Pezo, Lato

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Authority KeyName Variants
orcid::0000-0002-0704-3084
  • Pezo, Lato (19)
Projects
Osmotic dehydration of food - energy and ecological aspects of sustainable production Advanced technologies for monitoring and environmental protection from chemical pollutants and radiation burden
Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200051 (Institute of General and Physical Chemistry, Belgrade) Investigation of contemporary biotechnological processes in animal feed production aimed at increasing food competitiveness, quality and safety
Dynamics of nonlinear physicochemical and biochemical systems with modeling and predicting of their behavior under nonequilibrium conditions Application of advanced oxidation processes and nanostructured oxide materials for the removal of pollutants from the environment, development and optimisation of instrumental techniques for efficiency monitoring
Natural products of wild, cultivated and edible plants: structure and bioactivity determination Directed synthesis, structure and properties of multifunctional materials
Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200012 (Istitute of Material Testing of Serbia - IMS, Belgrade) Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200222 (Institute for Food Technology, Novi Sad)
Cellular and molecular basis of malignant and cardiovascular diseases-clinical implications Modulation of antioxidative metabolism in plants for improvement of plant abiotic stress tolerance and identification of new biomarkers for application in remediation and monitoring of degraded biotopes
Development and application of multifunctional materials using domestic raw materials in upgraded processing lines Synthesis, processing and characterization of nanostructured materials for application in the field of energy, mechanical engineering, environmental protection and biomedicine

Author's Bibliography

Experimental and computational study of the two-fluid nozzle spreading characteristics

Pezo, Milada L.; Pezo, Lato; Dragojlović, Danka; Čolović, Radmilo; Čolović, Dušica; Vidosavljević, Strahinja; Hadnađev, Miroslav; Đuragić, Olivera

(2021)

TY  - JOUR
AU  - Pezo, Milada L.
AU  - Pezo, Lato
AU  - Dragojlović, Danka
AU  - Čolović, Radmilo
AU  - Čolović, Dušica
AU  - Vidosavljević, Strahinja
AU  - Hadnađev, Miroslav
AU  - Đuragić, Olivera
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8921
AB  - Spray nozzles are widely used in processing industry for spreading evenly large amount of fluids. The expansion of fluid depends on the nozzle type, the parameters of the nozzle and the characteristics of the working fluids. The experiments were performed for five fluid types used in food/pharma/animal feed application (glycerol, soybean oil, molasses, hydroxypropyl methylcellulose, tara gum), three diameters of the nozzle (1 mm, 3 mm, 5 mm) and three fluid temperatures (40 °C, 50 °C and 60 °C). An experimentally validated numerical model was developed, based on laminar two-phase flow, investigating different liquids, assuming the ideal gas flow, applying the finite volume method and volume of the fluid model with interface tracking. The effects of liquid parameters, nozzle diameter and liquid temperature on the characteristics of the jet were also analysed by artificial neural network model. The nozzle diameter strongly influenced the spreading characteristics of the jet, while the temperature affected the liquid viscosity. The increase of the temperature also led to the augment of the spreading angle of the fluid passing from the nozzle and also the enhancement of the spaying liquid expansion. © 2020 Institution of Chemical Engineers
T2  - Chemical Engineering Research and Design
T1  - Experimental and computational study of the two-fluid nozzle spreading characteristics
VL  - 166
SP  - 18
EP  - 28
DO  - 10.1016/j.cherd.2020.11.027
ER  - 
@article{
author = "Pezo, Milada L. and Pezo, Lato and Dragojlović, Danka and Čolović, Radmilo and Čolović, Dušica and Vidosavljević, Strahinja and Hadnađev, Miroslav and Đuragić, Olivera",
year = "2021",
url = "https://vinar.vin.bg.ac.rs/handle/123456789/8921",
abstract = "Spray nozzles are widely used in processing industry for spreading evenly large amount of fluids. The expansion of fluid depends on the nozzle type, the parameters of the nozzle and the characteristics of the working fluids. The experiments were performed for five fluid types used in food/pharma/animal feed application (glycerol, soybean oil, molasses, hydroxypropyl methylcellulose, tara gum), three diameters of the nozzle (1 mm, 3 mm, 5 mm) and three fluid temperatures (40 °C, 50 °C and 60 °C). An experimentally validated numerical model was developed, based on laminar two-phase flow, investigating different liquids, assuming the ideal gas flow, applying the finite volume method and volume of the fluid model with interface tracking. The effects of liquid parameters, nozzle diameter and liquid temperature on the characteristics of the jet were also analysed by artificial neural network model. The nozzle diameter strongly influenced the spreading characteristics of the jet, while the temperature affected the liquid viscosity. The increase of the temperature also led to the augment of the spreading angle of the fluid passing from the nozzle and also the enhancement of the spaying liquid expansion. © 2020 Institution of Chemical Engineers",
journal = "Chemical Engineering Research and Design",
title = "Experimental and computational study of the two-fluid nozzle spreading characteristics",
volume = "166",
pages = "18-28",
doi = "10.1016/j.cherd.2020.11.027"
}
Pezo, M. L., Pezo, L., Dragojlović, D., Čolović, R., Čolović, D., Vidosavljević, S., Hadnađev, M.,& Đuragić, O. (2021). Experimental and computational study of the two-fluid nozzle spreading characteristics.
Chemical Engineering Research and Design, 166, 18-28.
https://doi.org/10.1016/j.cherd.2020.11.027
Pezo ML, Pezo L, Dragojlović D, Čolović R, Čolović D, Vidosavljević S, Hadnađev M, Đuragić O. Experimental and computational study of the two-fluid nozzle spreading characteristics. Chemical Engineering Research and Design. 2021;166:18-28
Pezo Milada L., Pezo Lato, Dragojlović Danka, Čolović Radmilo, Čolović Dušica, Vidosavljević Strahinja, Hadnađev Miroslav, Đuragić Olivera, "Experimental and computational study of the two-fluid nozzle spreading characteristics" Chemical Engineering Research and Design, 166 (2021):18-28,
https://doi.org/10.1016/j.cherd.2020.11.027 .

Blending performance of the coupled Ross static mixer and vertical feed mixer - Discrete element model approach

Pezo, Lato; Pezo, Milada L.; Banjac, Vojislav; Jovanović, Aca; Krulj, Jelena; Kojić, Jovana; Kojić, Predrag

(2020)

TY  - JOUR
AU  - Pezo, Lato
AU  - Pezo, Milada L.
AU  - Banjac, Vojislav
AU  - Jovanović, Aca
AU  - Krulj, Jelena
AU  - Kojić, Jovana
AU  - Kojić, Predrag
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9118
AB  - The mixing quality of the pigeon diet mix was studied after the mixing in the Ross-type static mixer (pre-mixer) and the vertical feed mixer (final mixer in the line). Three different experiments were performed: firstly, the possibilities of static mixer were investigated, secondly the blending performance of the vertical feed mixer, and the combination of these approaches in the third experiment. The Discrete Element Method was used in numerical modelling of granular flow in the pre-mixer and the vertical feed mixer, to predict the inter-particle mixing quality, and the results of the mixing. The results of the model were compared with appropriate experiments. The main goal was to foresee the behaviour of mixture in two type of mixers and to evaluate the combined mixing action of these two mixers, in order to explore the possibilities to increase the mixing quality, shorten the mixing time and to reduce the energy consumption.
T2  - Powder Technology
T1  - Blending performance of the coupled Ross static mixer and vertical feed mixer - Discrete element model approach
VL  - 375
SP  - 20
EP  - 27
DO  - 10.1016/j.powtec.2020.07.104
ER  - 
@article{
author = "Pezo, Lato and Pezo, Milada L. and Banjac, Vojislav and Jovanović, Aca and Krulj, Jelena and Kojić, Jovana and Kojić, Predrag",
year = "2020",
url = "https://vinar.vin.bg.ac.rs/handle/123456789/9118",
abstract = "The mixing quality of the pigeon diet mix was studied after the mixing in the Ross-type static mixer (pre-mixer) and the vertical feed mixer (final mixer in the line). Three different experiments were performed: firstly, the possibilities of static mixer were investigated, secondly the blending performance of the vertical feed mixer, and the combination of these approaches in the third experiment. The Discrete Element Method was used in numerical modelling of granular flow in the pre-mixer and the vertical feed mixer, to predict the inter-particle mixing quality, and the results of the mixing. The results of the model were compared with appropriate experiments. The main goal was to foresee the behaviour of mixture in two type of mixers and to evaluate the combined mixing action of these two mixers, in order to explore the possibilities to increase the mixing quality, shorten the mixing time and to reduce the energy consumption.",
journal = "Powder Technology",
title = "Blending performance of the coupled Ross static mixer and vertical feed mixer - Discrete element model approach",
volume = "375",
pages = "20-27",
doi = "10.1016/j.powtec.2020.07.104"
}
Pezo, L., Pezo, M. L., Banjac, V., Jovanović, A., Krulj, J., Kojić, J.,& Kojić, P. (2020). Blending performance of the coupled Ross static mixer and vertical feed mixer - Discrete element model approach.
Powder Technology, 375, 20-27.
https://doi.org/10.1016/j.powtec.2020.07.104
Pezo L, Pezo ML, Banjac V, Jovanović A, Krulj J, Kojić J, Kojić P. Blending performance of the coupled Ross static mixer and vertical feed mixer - Discrete element model approach. Powder Technology. 2020;375:20-27
Pezo Lato, Pezo Milada L., Banjac Vojislav, Jovanović Aca, Krulj Jelena, Kojić Jovana, Kojić Predrag, "Blending performance of the coupled Ross static mixer and vertical feed mixer - Discrete element model approach" Powder Technology, 375 (2020):20-27,
https://doi.org/10.1016/j.powtec.2020.07.104 .
1
1

Prediction model based on artificial neural network for pyrophyllite mechano-chemical activation as an integral step in production of cement binders

Terzić, Anja; Radulović, Dragan; Pezo, Milada; Stojanović, Jovica; Pezo, Lato; Radojević, Zagorka; Andrić, Ljubiša

(2020)

TY  - JOUR
AU  - Terzić, Anja
AU  - Radulović, Dragan
AU  - Pezo, Milada
AU  - Stojanović, Jovica
AU  - Pezo, Lato
AU  - Radojević, Zagorka
AU  - Andrić, Ljubiša
PY  - 2020
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9042
AB  - The optimal outputs of pyrophyllite mechano-chemical activation in an ultra-centrifugal mill performing under different technological conditions were determined by analytical modeling and verified via Artificial Neural Network in order to be employed in the production of cement-based binders. Cluster Analysis and Principal Component Analysis were utilized in assessment of the effect of activation process parameters on the activated pyrophyllite quality. Artificial Neural Network which performed with high prediction accuracy, i.e. 0.914 during the training period, was sufficient for precise prediction of activated pyrophyllite quality in a wide range of processing parameters. The probability of utilization of observed activation products was estimated through interrelation of technological parameters (mesh size sieve, activation period, specific energy consumption) and acquired characteristics of pyrophyllite (grain diameter, specific surface area). The optimal products singled out from each activation sequence were used as mineral additives in the mix-designs of four cement binders (cement replacement portion was 30%). Influence of activated pyrophyllite additions on the cement chemistry, mineral phase compositions and microstructures of the cement binders were monitored by instrumental techniques (DTA/TGA, XRD, SEM). Activated pyrophyllite showed characteristics of pozzolana as it slightly accelerated early stages of hydration, decreased cement hydration energy and increased the quantity of cement mineral alite at later hydration stages. Micron-sized crystalline foila characteristic for mechanically activated pyrophyllite formed micro-reinforcement within cement binder microstructure.
T2  - Construction and Building Materials
T1  - Prediction model based on artificial neural network for pyrophyllite mechano-chemical activation as an integral step in production of cement binders
VL  - 258
SP  - 119721
DO  - 10.1016/j.conbuildmat.2020.119721
ER  - 
@article{
author = "Terzić, Anja and Radulović, Dragan and Pezo, Milada and Stojanović, Jovica and Pezo, Lato and Radojević, Zagorka and Andrić, Ljubiša",
year = "2020",
url = "https://vinar.vin.bg.ac.rs/handle/123456789/9042",
abstract = "The optimal outputs of pyrophyllite mechano-chemical activation in an ultra-centrifugal mill performing under different technological conditions were determined by analytical modeling and verified via Artificial Neural Network in order to be employed in the production of cement-based binders. Cluster Analysis and Principal Component Analysis were utilized in assessment of the effect of activation process parameters on the activated pyrophyllite quality. Artificial Neural Network which performed with high prediction accuracy, i.e. 0.914 during the training period, was sufficient for precise prediction of activated pyrophyllite quality in a wide range of processing parameters. The probability of utilization of observed activation products was estimated through interrelation of technological parameters (mesh size sieve, activation period, specific energy consumption) and acquired characteristics of pyrophyllite (grain diameter, specific surface area). The optimal products singled out from each activation sequence were used as mineral additives in the mix-designs of four cement binders (cement replacement portion was 30%). Influence of activated pyrophyllite additions on the cement chemistry, mineral phase compositions and microstructures of the cement binders were monitored by instrumental techniques (DTA/TGA, XRD, SEM). Activated pyrophyllite showed characteristics of pozzolana as it slightly accelerated early stages of hydration, decreased cement hydration energy and increased the quantity of cement mineral alite at later hydration stages. Micron-sized crystalline foila characteristic for mechanically activated pyrophyllite formed micro-reinforcement within cement binder microstructure.",
journal = "Construction and Building Materials",
title = "Prediction model based on artificial neural network for pyrophyllite mechano-chemical activation as an integral step in production of cement binders",
volume = "258",
pages = "119721",
doi = "10.1016/j.conbuildmat.2020.119721"
}
Terzić, A., Radulović, D., Pezo, M., Stojanović, J., Pezo, L., Radojević, Z.,& Andrić, L. (2020). Prediction model based on artificial neural network for pyrophyllite mechano-chemical activation as an integral step in production of cement binders.
Construction and Building Materials, 258, 119721.
https://doi.org/10.1016/j.conbuildmat.2020.119721
Terzić A, Radulović D, Pezo M, Stojanović J, Pezo L, Radojević Z, Andrić L. Prediction model based on artificial neural network for pyrophyllite mechano-chemical activation as an integral step in production of cement binders. Construction and Building Materials. 2020;258:119721
Terzić Anja, Radulović Dragan, Pezo Milada, Stojanović Jovica, Pezo Lato, Radojević Zagorka, Andrić Ljubiša, "Prediction model based on artificial neural network for pyrophyllite mechano-chemical activation as an integral step in production of cement binders" Construction and Building Materials, 258 (2020):119721,
https://doi.org/10.1016/j.conbuildmat.2020.119721 .

Application of soybean oil and glycerol in animal feed production, ANN model

Dragojlović, Danka; Pezo, Lato; Čolović, Dušica; Vidosavljević, Strahinja; Pezo, Milada L.; Čolović, Radmilo; Kokić, Bojana; Đuragić, Olivera

(2019)

TY  - JOUR
AU  - Dragojlović, Danka
AU  - Pezo, Lato
AU  - Čolović, Dušica
AU  - Vidosavljević, Strahinja
AU  - Pezo, Milada L.
AU  - Čolović, Radmilo
AU  - Kokić, Bojana
AU  - Đuragić, Olivera
PY  - 2019
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/8821
AB  - In the past few decades the diet preparation in feed production has evolved towards more complicated technological operations, which include different liquid addition. A wide scale of different liquids is used in contemporary animal feed production, from oils and glycerol to more expensive products in a liquid form, such as enzymes, flavourings, amino acids, vitamins and others. In the presented study the liquid addition in feed production was observed, with a specific goal to investigate the spraying systems in order to better understand the effects of fluids, such as soybean oil and glycerol, on feed production. The dispersion angles of spraying nozzle for glycerol and soybean oil were determined as an indicator of the uniform application of liquids during feed production. Dispersion of the material was accomplished using the two-fluid nozzle. The performance of Artificial Neural Network (ANN) was compared with experimental data in order to develop rapid and accurate method for prediction of dispersion angle. The ANN model showed high prediction accuracy (r2 = 0.945).
T2  - Acta Periodica Technologica
T1  - Application of soybean oil and glycerol in animal feed production, ANN model
IS  - 50
SP  - 51
EP  - 58
DO  - 10.2298/APT1950051D
ER  - 
@article{
author = "Dragojlović, Danka and Pezo, Lato and Čolović, Dušica and Vidosavljević, Strahinja and Pezo, Milada L. and Čolović, Radmilo and Kokić, Bojana and Đuragić, Olivera",
year = "2019",
url = "https://vinar.vin.bg.ac.rs/handle/123456789/8821",
abstract = "In the past few decades the diet preparation in feed production has evolved towards more complicated technological operations, which include different liquid addition. A wide scale of different liquids is used in contemporary animal feed production, from oils and glycerol to more expensive products in a liquid form, such as enzymes, flavourings, amino acids, vitamins and others. In the presented study the liquid addition in feed production was observed, with a specific goal to investigate the spraying systems in order to better understand the effects of fluids, such as soybean oil and glycerol, on feed production. The dispersion angles of spraying nozzle for glycerol and soybean oil were determined as an indicator of the uniform application of liquids during feed production. Dispersion of the material was accomplished using the two-fluid nozzle. The performance of Artificial Neural Network (ANN) was compared with experimental data in order to develop rapid and accurate method for prediction of dispersion angle. The ANN model showed high prediction accuracy (r2 = 0.945).",
journal = "Acta Periodica Technologica",
title = "Application of soybean oil and glycerol in animal feed production, ANN model",
number = "50",
pages = "51-58",
doi = "10.2298/APT1950051D"
}
Dragojlović, D., Pezo, L., Čolović, D., Vidosavljević, S., Pezo, M. L., Čolović, R., Kokić, B.,& Đuragić, O. (2019). Application of soybean oil and glycerol in animal feed production, ANN model.
Acta Periodica Technologica(50), 51-58.
https://doi.org/10.2298/APT1950051D
Dragojlović D, Pezo L, Čolović D, Vidosavljević S, Pezo ML, Čolović R, Kokić B, Đuragić O. Application of soybean oil and glycerol in animal feed production, ANN model. Acta Periodica Technologica. 2019;(50):51-58
Dragojlović Danka, Pezo Lato, Čolović Dušica, Vidosavljević Strahinja, Pezo Milada L., Čolović Radmilo, Kokić Bojana, Đuragić Olivera, "Application of soybean oil and glycerol in animal feed production, ANN model" Acta Periodica Technologica, no. 50 (2019):51-58,
https://doi.org/10.2298/APT1950051D .
1
1

The joint mixing action of the static pre-mixer and the rotating drum mixer – Discrete element method approach

Pezo, Lato; Pezo, Milada L.; Jovanović, Aca; Čolović, Radmilo; Vukmirović, Đuro; Banjac, Vojislav; Đuragić, Olivera

(2018)

TY  - JOUR
AU  - Pezo, Lato
AU  - Pezo, Milada L.
AU  - Jovanović, Aca
AU  - Čolović, Radmilo
AU  - Vukmirović, Đuro
AU  - Banjac, Vojislav
AU  - Đuragić, Olivera
PY  - 2018
UR  - http://linkinghub.elsevier.com/retrieve/pii/S092188311830147X
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7673
AB  - In this study, the mixing performance of coupled mixing action of the Komax static mixer (which is used as a pre-mixer) and rotating drum (applied as the final mixer) was explored in the maize meal mixing operation. The main objective of this paper was to predict the behaviour of the previously grinded maize particles, during the mixing process in static mixer and drum mixer, and to explore the possibilities to shorten the mixing time in the main mixer (in order to reduce the energy consumption). Three different experiments were performed: in the first experiment, possibilities of static mixer were explored, second experiment showed the mixing performance of rotating drum, and the combination of these two mixing devices was investigated in the third experiment. Homogeneity of the obtained mixtures was determined experimentally, by the “Microtracers” method. The Discrete Element Method was used for modelling of granular flow in the pre-mixing and final mixing applications, and to predict the inter-particle mixing quality within a static mixer and the rotating drum mixer. The results of the numerical simulation are compared with appropriate experimental results. The possible industrial application of this model could be the optimization of parameters of mixing systems taking into account the quality and the duration of the mixing process.
T2  - Advanced Powder Technology
T1  - The joint mixing action of the static pre-mixer and the rotating drum mixer – Discrete element method approach
VL  - 29
IS  - 7
SP  - 1734
EP  - 1741
DO  - 10.1016/j.apt.2018.04.008
ER  - 
@article{
author = "Pezo, Lato and Pezo, Milada L. and Jovanović, Aca and Čolović, Radmilo and Vukmirović, Đuro and Banjac, Vojislav and Đuragić, Olivera",
year = "2018",
url = "http://linkinghub.elsevier.com/retrieve/pii/S092188311830147X, http://vinar.vin.bg.ac.rs/handle/123456789/7673",
abstract = "In this study, the mixing performance of coupled mixing action of the Komax static mixer (which is used as a pre-mixer) and rotating drum (applied as the final mixer) was explored in the maize meal mixing operation. The main objective of this paper was to predict the behaviour of the previously grinded maize particles, during the mixing process in static mixer and drum mixer, and to explore the possibilities to shorten the mixing time in the main mixer (in order to reduce the energy consumption). Three different experiments were performed: in the first experiment, possibilities of static mixer were explored, second experiment showed the mixing performance of rotating drum, and the combination of these two mixing devices was investigated in the third experiment. Homogeneity of the obtained mixtures was determined experimentally, by the “Microtracers” method. The Discrete Element Method was used for modelling of granular flow in the pre-mixing and final mixing applications, and to predict the inter-particle mixing quality within a static mixer and the rotating drum mixer. The results of the numerical simulation are compared with appropriate experimental results. The possible industrial application of this model could be the optimization of parameters of mixing systems taking into account the quality and the duration of the mixing process.",
journal = "Advanced Powder Technology",
title = "The joint mixing action of the static pre-mixer and the rotating drum mixer – Discrete element method approach",
volume = "29",
number = "7",
pages = "1734-1741",
doi = "10.1016/j.apt.2018.04.008"
}
Pezo, L., Pezo, M. L., Jovanović, A., Čolović, R., Vukmirović, Đ., Banjac, V.,& Đuragić, O. (2018). The joint mixing action of the static pre-mixer and the rotating drum mixer – Discrete element method approach.
Advanced Powder Technology, 29(7), 1734-1741.
https://doi.org/10.1016/j.apt.2018.04.008
Pezo L, Pezo ML, Jovanović A, Čolović R, Vukmirović Đ, Banjac V, Đuragić O. The joint mixing action of the static pre-mixer and the rotating drum mixer – Discrete element method approach. Advanced Powder Technology. 2018;29(7):1734-1741
Pezo Lato, Pezo Milada L., Jovanović Aca, Čolović Radmilo, Vukmirović Đuro, Banjac Vojislav, Đuragić Olivera, "The joint mixing action of the static pre-mixer and the rotating drum mixer – Discrete element method approach" Advanced Powder Technology, 29, no. 7 (2018):1734-1741,
https://doi.org/10.1016/j.apt.2018.04.008 .
7
3
6

Discrete element model of particle transport and premixing action in modified screw conveyors

Pezo, Milada L.; Pezo, Lato; Jovanović, Aca; Terzić, Anja; Andrić, Ljubiša; Lončar, Biljana; Kojić, Predrag S.

(2018)

TY  - JOUR
AU  - Pezo, Milada L.
AU  - Pezo, Lato
AU  - Jovanović, Aca
AU  - Terzić, Anja
AU  - Andrić, Ljubiša
AU  - Lončar, Biljana
AU  - Kojić, Predrag S.
PY  - 2018
UR  - https://linkinghub.elsevier.com/retrieve/pii/S0032591018304480
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7719
AB  - In this paper, five types of horizontal single-pitch screw conveyors with modified geometry, with three different lengths (400, 600 and 800 mm) were investigated for transport and auxiliary mixing action of two materials: natural zeolite and quartz aggregate (sand) with particle sizes 3, 4 and 5 mm. The geometry of the screw transporter is changed by welding three additional helices oriented in the same or the opposite direction from screw cutting edges, enabling the premixing of materials, during the transport. The proper mixing of the observed materials provides an adequate disposition of zeolite particles within the composite and prevents agglomeration and interference with cement hydration. Zeolite application as a binder in a building material is a possible solution to environmental pollution problems caused by cement production. The influences of screw length, particle diameter, the studied geometry variations of screw design, on the mixing performances of the screw conveyor-mixer during material transport were explored. All investigations were performed experimentally and numerically, by using Discrete Element Method (DEM). The experimental results and the results of the DEM investigation were used for the development of mathematical models for the prediction of mixing quality, which are presented in the form of second order polynomial and artificial neural network model.
T2  - Powder Technology
T1  - Discrete element model of particle transport and premixing action in modified screw conveyors
VL  - 336
SP  - 255
EP  - 264
DO  - 10.1016/j.powtec.2018.06.009
ER  - 
@article{
author = "Pezo, Milada L. and Pezo, Lato and Jovanović, Aca and Terzić, Anja and Andrić, Ljubiša and Lončar, Biljana and Kojić, Predrag S.",
year = "2018",
url = "https://linkinghub.elsevier.com/retrieve/pii/S0032591018304480, http://vinar.vin.bg.ac.rs/handle/123456789/7719",
abstract = "In this paper, five types of horizontal single-pitch screw conveyors with modified geometry, with three different lengths (400, 600 and 800 mm) were investigated for transport and auxiliary mixing action of two materials: natural zeolite and quartz aggregate (sand) with particle sizes 3, 4 and 5 mm. The geometry of the screw transporter is changed by welding three additional helices oriented in the same or the opposite direction from screw cutting edges, enabling the premixing of materials, during the transport. The proper mixing of the observed materials provides an adequate disposition of zeolite particles within the composite and prevents agglomeration and interference with cement hydration. Zeolite application as a binder in a building material is a possible solution to environmental pollution problems caused by cement production. The influences of screw length, particle diameter, the studied geometry variations of screw design, on the mixing performances of the screw conveyor-mixer during material transport were explored. All investigations were performed experimentally and numerically, by using Discrete Element Method (DEM). The experimental results and the results of the DEM investigation were used for the development of mathematical models for the prediction of mixing quality, which are presented in the form of second order polynomial and artificial neural network model.",
journal = "Powder Technology",
title = "Discrete element model of particle transport and premixing action in modified screw conveyors",
volume = "336",
pages = "255-264",
doi = "10.1016/j.powtec.2018.06.009"
}
Pezo, M. L., Pezo, L., Jovanović, A., Terzić, A., Andrić, L., Lončar, B.,& Kojić, P. S. (2018). Discrete element model of particle transport and premixing action in modified screw conveyors.
Powder Technology, 336, 255-264.
https://doi.org/10.1016/j.powtec.2018.06.009
Pezo ML, Pezo L, Jovanović A, Terzić A, Andrić L, Lončar B, Kojić PS. Discrete element model of particle transport and premixing action in modified screw conveyors. Powder Technology. 2018;336:255-264
Pezo Milada L., Pezo Lato, Jovanović Aca, Terzić Anja, Andrić Ljubiša, Lončar Biljana, Kojić Predrag S., "Discrete element model of particle transport and premixing action in modified screw conveyors" Powder Technology, 336 (2018):255-264,
https://doi.org/10.1016/j.powtec.2018.06.009 .
6
4
9

Antioxidant Activity of Selected Polyphenolics in Yeast Cells: The Case Study of Montenegrin Merlot Wine

Đorđević, Neda O.; Todorović, Nevena; Novaković, Irena T.; Pezo, Lato; Pejin, Boris; Maraš, Vesna; Tešević, Vele V.; Pajović, Snežana B.

(2018)

TY  - JOUR
AU  - Đorđević, Neda O.
AU  - Todorović, Nevena
AU  - Novaković, Irena T.
AU  - Pezo, Lato
AU  - Pejin, Boris
AU  - Maraš, Vesna
AU  - Tešević, Vele V.
AU  - Pajović, Snežana B.
PY  - 2018
UR  - http://www.mdpi.com/1420-3049/23/8/1971
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/7858
AB  - Screens of antioxidant activity (AA) of various natural products have been a focus of the research community worldwide. This work aimed to differentiate selected samples of Merlot wines originated from Montenegro, with regard to phenolic profile and antioxidant capacity studied by survival rate, total sulfhydryl groups and activities of glutathione peroxidase (GPx), glutathione reductase and catalase in H2O2–stressed Saccharomyces cerevisiae cells. In this study, DPPH assay was also performed. Higher total phenolic content leads to an enhanced AA under both conditions. The same trend was observed for catechin and gallic acid, the most abundant phenolics in the examined wine samples. Finally, the findings of an Artificial Neural Network (ANN) model were in a good agreement (r2 = 0.978) with the experimental data. All tested samples exhibited a protective effect in H2O2–stressed yeast cells. Pre-treatment with examined wines increased survival in H2O2–stressed cells and shifted antioxidative defense towards GPx–mediated defense. Finally, sensitivity analysis of obtained ANN model highlights the complexity of the impact that variations in the concentrations of specific phenolic components have on the antioxidant defense system.
T2  - Molecules
T1  - Antioxidant Activity of Selected Polyphenolics in Yeast Cells: The Case Study of Montenegrin Merlot Wine
VL  - 23
IS  - 8
SP  - 1971
DO  - 10.3390/molecules23081971
ER  - 
@article{
author = "Đorđević, Neda O. and Todorović, Nevena and Novaković, Irena T. and Pezo, Lato and Pejin, Boris and Maraš, Vesna and Tešević, Vele V. and Pajović, Snežana B.",
year = "2018",
url = "http://www.mdpi.com/1420-3049/23/8/1971, http://vinar.vin.bg.ac.rs/handle/123456789/7858",
abstract = "Screens of antioxidant activity (AA) of various natural products have been a focus of the research community worldwide. This work aimed to differentiate selected samples of Merlot wines originated from Montenegro, with regard to phenolic profile and antioxidant capacity studied by survival rate, total sulfhydryl groups and activities of glutathione peroxidase (GPx), glutathione reductase and catalase in H2O2–stressed Saccharomyces cerevisiae cells. In this study, DPPH assay was also performed. Higher total phenolic content leads to an enhanced AA under both conditions. The same trend was observed for catechin and gallic acid, the most abundant phenolics in the examined wine samples. Finally, the findings of an Artificial Neural Network (ANN) model were in a good agreement (r2 = 0.978) with the experimental data. All tested samples exhibited a protective effect in H2O2–stressed yeast cells. Pre-treatment with examined wines increased survival in H2O2–stressed cells and shifted antioxidative defense towards GPx–mediated defense. Finally, sensitivity analysis of obtained ANN model highlights the complexity of the impact that variations in the concentrations of specific phenolic components have on the antioxidant defense system.",
journal = "Molecules",
title = "Antioxidant Activity of Selected Polyphenolics in Yeast Cells: The Case Study of Montenegrin Merlot Wine",
volume = "23",
number = "8",
pages = "1971",
doi = "10.3390/molecules23081971"
}
Đorđević, N. O., Todorović, N., Novaković, I. T., Pezo, L., Pejin, B., Maraš, V., Tešević, V. V.,& Pajović, S. B. (2018). Antioxidant Activity of Selected Polyphenolics in Yeast Cells: The Case Study of Montenegrin Merlot Wine.
Molecules, 23(8), 1971.
https://doi.org/10.3390/molecules23081971
Đorđević NO, Todorović N, Novaković IT, Pezo L, Pejin B, Maraš V, Tešević VV, Pajović SB. Antioxidant Activity of Selected Polyphenolics in Yeast Cells: The Case Study of Montenegrin Merlot Wine. Molecules. 2018;23(8):1971
Đorđević Neda O., Todorović Nevena, Novaković Irena T., Pezo Lato, Pejin Boris, Maraš Vesna, Tešević Vele V., Pajović Snežana B., "Antioxidant Activity of Selected Polyphenolics in Yeast Cells: The Case Study of Montenegrin Merlot Wine" Molecules, 23, no. 8 (2018):1971,
https://doi.org/10.3390/molecules23081971 .
9
8
9

Optimization of the classification process in the zigzag air classifier for obtaining a high protein sunflower meal - Chemometric and CFD approach

Banjac, Vojislav; Pezo, Lato; Pezo, Milada L.; Vukmirović, Đuro; Colovic, Dusica; Fistes, Aleksandar; Čolović, Radmilo

(2017)

TY  - JOUR
AU  - Banjac, Vojislav
AU  - Pezo, Lato
AU  - Pezo, Milada L.
AU  - Vukmirović, Đuro
AU  - Colovic, Dusica
AU  - Fistes, Aleksandar
AU  - Čolović, Radmilo
PY  - 2017
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1492
AB  - In this study, sunflower meal is ground by a hammer mill after which air zigzag gravitational air classifier is used for separating sunflower hulls from the kernels in order to obtain protein rich fractions. Three hammer mill sieves with sieve openings diameter of 3, 2 and 1 mm were used, while three air flows (5, 8.7 and 12.5 m(3)/h) and three feed rates (30%, 60% an 90% of bowl feeder oscillation maximum rate) were varied during air classification process. For describing the effects of the test variables on the observed responses Principal Component Analysis, Standard Score analysis and Response Surface Methodology were used. Beside experimental investigations, CFD model was used for numerical optimization of sunflower meal air classification process. Air classification of hammer milled sunflower meal resulted in coarse fractions enriched in protein content. The decrease in sieve openings diameter of the hammer mill sieve increased protein content in coarse fractions of sunflower meal obtained at same air flow, and at the same time decreased matching fraction yield. Increase in air flow lead to the increase in protein content along the same hammer mill sieve. Standard score analysis showed that optimum values for protein content and ratio of coarse and fine fractions have been obtained by using a sieve with 1 mm opening diameter, air flow of 12.5 m(3)/h and 60% of the maximum feeder rate. Fraction ratio and protein content were mostly affected by the linear term of air flow and the sieve openings diameter of the hammer mill sieve in the Second Order Polynomial model. The main focus of CFD analysis was on the particle simulation and the evaluation of the separation efficiency of the zigzag classifier. (C) 2017 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
T2  - Advanced Powder Technology
T1  - Optimization of the classification process in the zigzag air classifier for obtaining a high protein sunflower meal - Chemometric and CFD approach
VL  - 28
IS  - 3
SP  - 1069
EP  - 1078
DO  - 10.1016/j.apt.2017.01.013
ER  - 
@article{
author = "Banjac, Vojislav and Pezo, Lato and Pezo, Milada L. and Vukmirović, Đuro and Colovic, Dusica and Fistes, Aleksandar and Čolović, Radmilo",
year = "2017",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/1492",
abstract = "In this study, sunflower meal is ground by a hammer mill after which air zigzag gravitational air classifier is used for separating sunflower hulls from the kernels in order to obtain protein rich fractions. Three hammer mill sieves with sieve openings diameter of 3, 2 and 1 mm were used, while three air flows (5, 8.7 and 12.5 m(3)/h) and three feed rates (30%, 60% an 90% of bowl feeder oscillation maximum rate) were varied during air classification process. For describing the effects of the test variables on the observed responses Principal Component Analysis, Standard Score analysis and Response Surface Methodology were used. Beside experimental investigations, CFD model was used for numerical optimization of sunflower meal air classification process. Air classification of hammer milled sunflower meal resulted in coarse fractions enriched in protein content. The decrease in sieve openings diameter of the hammer mill sieve increased protein content in coarse fractions of sunflower meal obtained at same air flow, and at the same time decreased matching fraction yield. Increase in air flow lead to the increase in protein content along the same hammer mill sieve. Standard score analysis showed that optimum values for protein content and ratio of coarse and fine fractions have been obtained by using a sieve with 1 mm opening diameter, air flow of 12.5 m(3)/h and 60% of the maximum feeder rate. Fraction ratio and protein content were mostly affected by the linear term of air flow and the sieve openings diameter of the hammer mill sieve in the Second Order Polynomial model. The main focus of CFD analysis was on the particle simulation and the evaluation of the separation efficiency of the zigzag classifier. (C) 2017 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.",
journal = "Advanced Powder Technology",
title = "Optimization of the classification process in the zigzag air classifier for obtaining a high protein sunflower meal - Chemometric and CFD approach",
volume = "28",
number = "3",
pages = "1069-1078",
doi = "10.1016/j.apt.2017.01.013"
}
Banjac, V., Pezo, L., Pezo, M. L., Vukmirović, Đ., Colovic, D., Fistes, A.,& Čolović, R. (2017). Optimization of the classification process in the zigzag air classifier for obtaining a high protein sunflower meal - Chemometric and CFD approach.
Advanced Powder Technology, 28(3), 1069-1078.
https://doi.org/10.1016/j.apt.2017.01.013
Banjac V, Pezo L, Pezo ML, Vukmirović Đ, Colovic D, Fistes A, Čolović R. Optimization of the classification process in the zigzag air classifier for obtaining a high protein sunflower meal - Chemometric and CFD approach. Advanced Powder Technology. 2017;28(3):1069-1078
Banjac Vojislav, Pezo Lato, Pezo Milada L., Vukmirović Đuro, Colovic Dusica, Fistes Aleksandar, Čolović Radmilo, "Optimization of the classification process in the zigzag air classifier for obtaining a high protein sunflower meal - Chemometric and CFD approach" Advanced Powder Technology, 28, no. 3 (2017):1069-1078,
https://doi.org/10.1016/j.apt.2017.01.013 .
10
7
8

DEM/CFD approach for modeling granular flow in the revolving static mixer

Pezo, Milada L.; Pezo, Lato; Jovanović, Aca; Lončar, Biljana; Čolović, Radmilo

(2016)

TY  - JOUR
AU  - Pezo, Milada L.
AU  - Pezo, Lato
AU  - Jovanović, Aca
AU  - Lončar, Biljana
AU  - Čolović, Radmilo
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1090
AB  - DEM/CFD (Discrete Element Method/Computational Fluid Dynamic) approach was used to develop a three dimensional model of fluid flow and mixing process of solid particles within the revolving static mixer, type Komax. Static mixers are widely used in process industry, food industry, pharmaceutical and chemical industry. Mixing process adds significant value to the final product and it can be regarded as a key process. The quality and the price of the product often depend on mixing efficiency. Both design and operation of the mixing unit itself have a strong influence on the quality produced. In this paper, DEM is used for modeling granular flow of zeolite spheres in the revolving Komax static mixer and CFD method was used for modeling fluid flow through the Eulerian multiphase model. Coupling of these two methods provides reliable analysis of particle motion and flow pattern of the working fluid. The objective of this paper is to predict the behavior of particles after several rotations of the revolving static mixer. This type of device is used for premixing action before the main mixing process, for significant reduction of mixing time and energy consumption. This type of premixing action is not investigated in detail in the open literature. The results of the numerical simulation are compared with appropriate experimental results. The special design revolving static mixer, made of transparent Plexiglas was used for this experiment. Mixing quality was examined by RSD (relative standard deviation) criterion. Application of this model provides the optimization of the number of revolutions and geometrical parameters of mixing process taking into account the quality of the mixing process. (c) 2016 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
T2  - Chemical Engineering Research and Design
T1  - DEM/CFD approach for modeling granular flow in the revolving static mixer
VL  - 109
SP  - 317
EP  - 326
DO  - 10.1016/j.cherd.2016.02.003
ER  - 
@article{
author = "Pezo, Milada L. and Pezo, Lato and Jovanović, Aca and Lončar, Biljana and Čolović, Radmilo",
year = "2016",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/1090",
abstract = "DEM/CFD (Discrete Element Method/Computational Fluid Dynamic) approach was used to develop a three dimensional model of fluid flow and mixing process of solid particles within the revolving static mixer, type Komax. Static mixers are widely used in process industry, food industry, pharmaceutical and chemical industry. Mixing process adds significant value to the final product and it can be regarded as a key process. The quality and the price of the product often depend on mixing efficiency. Both design and operation of the mixing unit itself have a strong influence on the quality produced. In this paper, DEM is used for modeling granular flow of zeolite spheres in the revolving Komax static mixer and CFD method was used for modeling fluid flow through the Eulerian multiphase model. Coupling of these two methods provides reliable analysis of particle motion and flow pattern of the working fluid. The objective of this paper is to predict the behavior of particles after several rotations of the revolving static mixer. This type of device is used for premixing action before the main mixing process, for significant reduction of mixing time and energy consumption. This type of premixing action is not investigated in detail in the open literature. The results of the numerical simulation are compared with appropriate experimental results. The special design revolving static mixer, made of transparent Plexiglas was used for this experiment. Mixing quality was examined by RSD (relative standard deviation) criterion. Application of this model provides the optimization of the number of revolutions and geometrical parameters of mixing process taking into account the quality of the mixing process. (c) 2016 The Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved.",
journal = "Chemical Engineering Research and Design",
title = "DEM/CFD approach for modeling granular flow in the revolving static mixer",
volume = "109",
pages = "317-326",
doi = "10.1016/j.cherd.2016.02.003"
}
Pezo, M. L., Pezo, L., Jovanović, A., Lončar, B.,& Čolović, R. (2016). DEM/CFD approach for modeling granular flow in the revolving static mixer.
Chemical Engineering Research and Design, 109, 317-326.
https://doi.org/10.1016/j.cherd.2016.02.003
Pezo ML, Pezo L, Jovanović A, Lončar B, Čolović R. DEM/CFD approach for modeling granular flow in the revolving static mixer. Chemical Engineering Research and Design. 2016;109:317-326
Pezo Milada L., Pezo Lato, Jovanović Aca, Lončar Biljana, Čolović Radmilo, "DEM/CFD approach for modeling granular flow in the revolving static mixer" Chemical Engineering Research and Design, 109 (2016):317-326,
https://doi.org/10.1016/j.cherd.2016.02.003 .
11
12
13

Granular flow in static mixers by coupled DEM/CFD approach

Pezo, Lato; Pezo, Milada L.; Jovanović, Aca; Kosanic, Nenad; Petrović, Aleksandar Lj.; Levic, Ljubinko

(2016)

TY  - JOUR
AU  - Pezo, Lato
AU  - Pezo, Milada L.
AU  - Jovanović, Aca
AU  - Kosanic, Nenad
AU  - Petrović, Aleksandar Lj.
AU  - Levic, Ljubinko
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1307
AB  - The mixing process greatly influences the mixing efficiency, as well as the quality and the price of the intermediate and/or the final product. Static mixer is used for premixing action before the main mixing process, for significant reduction of mixing time and energy consumption. This type of premixing action is not investigated in detail in the open literature. In this article, the novel numerical approach called Discrete Element Method is used for modelling of granular flow in multiple static mixer applications (1-3 Komax or Ross mixing elements were utilized), while the Computational Fluid Dynamic Method was chosen for fluid flow modelling, using the Eulerian multiphase model. The main aim of this article is to predict the behavior of granules being gravitationally transported in different mixer configuration and to choose the best configuration of the mixer taking into account the total particle path, the number of mixing elements and the quality of the obtained mixture. The results of the numerical simulations in the static mixers were compared to experimental results, the mixing quality is examined by RSD (relative standard deviation) criterion, and the effects on the mixer type and the number of mixing elements on mixing process were studied. The effects of the mixer type and the number of mixing elements on mixing process were studied using analysis of variance (ANOVA). Mathematical modelling is used for optimization of number of Ross and Komax segments in mixer in order to gain desirable mixing results.
T2  - Hemijska industrija
T1  - Granular flow in static mixers by coupled DEM/CFD approach
VL  - 70
IS  - 5
SP  - 539
EP  - 546
DO  - 10.2298/HEMIND151013060P
ER  - 
@article{
author = "Pezo, Lato and Pezo, Milada L. and Jovanović, Aca and Kosanic, Nenad and Petrović, Aleksandar Lj. and Levic, Ljubinko",
year = "2016",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/1307",
abstract = "The mixing process greatly influences the mixing efficiency, as well as the quality and the price of the intermediate and/or the final product. Static mixer is used for premixing action before the main mixing process, for significant reduction of mixing time and energy consumption. This type of premixing action is not investigated in detail in the open literature. In this article, the novel numerical approach called Discrete Element Method is used for modelling of granular flow in multiple static mixer applications (1-3 Komax or Ross mixing elements were utilized), while the Computational Fluid Dynamic Method was chosen for fluid flow modelling, using the Eulerian multiphase model. The main aim of this article is to predict the behavior of granules being gravitationally transported in different mixer configuration and to choose the best configuration of the mixer taking into account the total particle path, the number of mixing elements and the quality of the obtained mixture. The results of the numerical simulations in the static mixers were compared to experimental results, the mixing quality is examined by RSD (relative standard deviation) criterion, and the effects on the mixer type and the number of mixing elements on mixing process were studied. The effects of the mixer type and the number of mixing elements on mixing process were studied using analysis of variance (ANOVA). Mathematical modelling is used for optimization of number of Ross and Komax segments in mixer in order to gain desirable mixing results.",
journal = "Hemijska industrija",
title = "Granular flow in static mixers by coupled DEM/CFD approach",
volume = "70",
number = "5",
pages = "539-546",
doi = "10.2298/HEMIND151013060P"
}
Pezo, L., Pezo, M. L., Jovanović, A., Kosanic, N., Petrović, A. Lj.,& Levic, L. (2016). Granular flow in static mixers by coupled DEM/CFD approach.
Hemijska industrija, 70(5), 539-546.
https://doi.org/10.2298/HEMIND151013060P
Pezo L, Pezo ML, Jovanović A, Kosanic N, Petrović AL, Levic L. Granular flow in static mixers by coupled DEM/CFD approach. Hemijska industrija. 2016;70(5):539-546
Pezo Lato, Pezo Milada L., Jovanović Aca, Kosanic Nenad, Petrović Aleksandar Lj., Levic Ljubinko, "Granular flow in static mixers by coupled DEM/CFD approach" Hemijska industrija, 70, no. 5 (2016):539-546,
https://doi.org/10.2298/HEMIND151013060P .
1
1
1

Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash

Savić-Biserčić, Marjetka; Pezo, Lato; Ignjatovic, Ivana Sredovic; Ignjatovic, Ljubisa; Savić, Andrija B.; Jovanović, Uroš D.; Andrić, Velibor

(2016)

TY  - JOUR
AU  - Savić-Biserčić, Marjetka
AU  - Pezo, Lato
AU  - Ignjatovic, Ivana Sredovic
AU  - Ignjatovic, Ljubisa
AU  - Savić, Andrija B.
AU  - Jovanović, Uroš D.
AU  - Andrić, Velibor
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1220
AB  - Two mechanical extraction techniques were used for the extraction of environmentaly interesting components of coal fly ash: shaking, during which the extraction process lasted from 6 up to 24 h, and sonication that lasted from 15 up to 60 min, using water as extractant. The concentration of anions in fly ash extracts was determined by ion chromatography, while atomic absorption spectrometry was used for determination of: As, Pb, Cd, Ni, Cr, Zn, Cu, Fe, Mn and Al. The ultrasonication yielded slightly higher amounts of extracted anions as well as Pb, Al, Mn and Fe cations, while shaking-assisted extraction was more efficient for the Cr, As, Zn and Ni ions. The changes in pH value, particle size distribution within colloid solution, zeta potential and conductivity during ultrasound-assisted extraction were measured in order to explain changes that occur on the surface of fly ash particles contacting water and different processes (adsorption, ion exchange and flocculation) that develop under natural conditions. Principal Component Analysis was used for assessing the effect of observed process parameters. It is essential to evaluate quantity of these elements leachable from coal fly ash into the surface waters in natural conditions in order to prevent contamination of the environment.
T2  - Journal of the Serbian Chemical Society
T1  - Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash
VL  - 81
IS  - 7
SP  - 813
EP  - 827
DO  - 10.2298/JSC151222027B
ER  - 
@article{
author = "Savić-Biserčić, Marjetka and Pezo, Lato and Ignjatovic, Ivana Sredovic and Ignjatovic, Ljubisa and Savić, Andrija B. and Jovanović, Uroš D. and Andrić, Velibor",
year = "2016",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/1220",
abstract = "Two mechanical extraction techniques were used for the extraction of environmentaly interesting components of coal fly ash: shaking, during which the extraction process lasted from 6 up to 24 h, and sonication that lasted from 15 up to 60 min, using water as extractant. The concentration of anions in fly ash extracts was determined by ion chromatography, while atomic absorption spectrometry was used for determination of: As, Pb, Cd, Ni, Cr, Zn, Cu, Fe, Mn and Al. The ultrasonication yielded slightly higher amounts of extracted anions as well as Pb, Al, Mn and Fe cations, while shaking-assisted extraction was more efficient for the Cr, As, Zn and Ni ions. The changes in pH value, particle size distribution within colloid solution, zeta potential and conductivity during ultrasound-assisted extraction were measured in order to explain changes that occur on the surface of fly ash particles contacting water and different processes (adsorption, ion exchange and flocculation) that develop under natural conditions. Principal Component Analysis was used for assessing the effect of observed process parameters. It is essential to evaluate quantity of these elements leachable from coal fly ash into the surface waters in natural conditions in order to prevent contamination of the environment.",
journal = "Journal of the Serbian Chemical Society",
title = "Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash",
volume = "81",
number = "7",
pages = "813-827",
doi = "10.2298/JSC151222027B"
}
Savić-Biserčić, M., Pezo, L., Ignjatovic, I. S., Ignjatovic, L., Savić, A. B., Jovanović, U. D.,& Andrić, V. (2016). Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash.
Journal of the Serbian Chemical Society, 81(7), 813-827.
https://doi.org/10.2298/JSC151222027B
Savić-Biserčić M, Pezo L, Ignjatovic IS, Ignjatovic L, Savić AB, Jovanović UD, Andrić V. Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash. Journal of the Serbian Chemical Society. 2016;81(7):813-827
Savić-Biserčić Marjetka, Pezo Lato, Ignjatovic Ivana Sredovic, Ignjatovic Ljubisa, Savić Andrija B., Jovanović Uroš D., Andrić Velibor, "Ultrasound and shacking-assisted water-leaching of anions and cations from fly ash" Journal of the Serbian Chemical Society, 81, no. 7 (2016):813-827,
https://doi.org/10.2298/JSC151222027B .
1
3
3

Chemical speciation of metals in unpolluted soils of different types: Correlation with soil characteristics and an ANN modelling approach

Marković, Jelena P.; Jović, Mihajlo D.; Smičiklas, Ivana D.; Pezo, Lato; Šljivić-Ivanović, Marija Z.; Onjia, Antonije E.; Popović, Aleksandar R.

(2016)

TY  - JOUR
AU  - Marković, Jelena P.
AU  - Jović, Mihajlo D.
AU  - Smičiklas, Ivana D.
AU  - Pezo, Lato
AU  - Šljivić-Ivanović, Marija Z.
AU  - Onjia, Antonije E.
AU  - Popović, Aleksandar R.
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1059
AB  - The distribution of elements in soil fractions affects their mobility and availability and thus their potential beneficial or harmful impact on ecosystems, biota and humans. Different mineralogical and chemical characteristics of soil influence elemental distribution. In the present study, chemical speciation of macro and micro elements (Al, Fe, Mn, K, Cd, Cr, Cu, Li, Ba, Ni, Pb and Zn) in unpolluted soils of different types, collected from the territory of the Republic of Serbia, were analysed by sequential extraction procedure. The impact of the physicochemical soil properties on the content, distribution, mobility and availability of elements was investigated. Principal component analysis was employed for the evaluation and characterization of the experimental data, understanding of the relationships between soil properties and the distribution, affiliation and connection of the elements. Finally, an artificial neural network (ANN) model was developed to explore the applicability of this approach for the prediction of the elemental distribution based on soil properties. Good agreement between the model and the experimental results implied that the ANN could be considered as a useful tool for control and prediction purposes. (C) 2016 Elsevier B.V. All rights reserved.
T2  - Journal of Geochemical Exploration
T1  - Chemical speciation of metals in unpolluted soils of different types: Correlation with soil characteristics and an ANN modelling approach
VL  - 165
SP  - 71
EP  - 80
DO  - 10.1016/j.gexplo.2016.03.004
ER  - 
@article{
author = "Marković, Jelena P. and Jović, Mihajlo D. and Smičiklas, Ivana D. and Pezo, Lato and Šljivić-Ivanović, Marija Z. and Onjia, Antonije E. and Popović, Aleksandar R.",
year = "2016",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/1059",
abstract = "The distribution of elements in soil fractions affects their mobility and availability and thus their potential beneficial or harmful impact on ecosystems, biota and humans. Different mineralogical and chemical characteristics of soil influence elemental distribution. In the present study, chemical speciation of macro and micro elements (Al, Fe, Mn, K, Cd, Cr, Cu, Li, Ba, Ni, Pb and Zn) in unpolluted soils of different types, collected from the territory of the Republic of Serbia, were analysed by sequential extraction procedure. The impact of the physicochemical soil properties on the content, distribution, mobility and availability of elements was investigated. Principal component analysis was employed for the evaluation and characterization of the experimental data, understanding of the relationships between soil properties and the distribution, affiliation and connection of the elements. Finally, an artificial neural network (ANN) model was developed to explore the applicability of this approach for the prediction of the elemental distribution based on soil properties. Good agreement between the model and the experimental results implied that the ANN could be considered as a useful tool for control and prediction purposes. (C) 2016 Elsevier B.V. All rights reserved.",
journal = "Journal of Geochemical Exploration",
title = "Chemical speciation of metals in unpolluted soils of different types: Correlation with soil characteristics and an ANN modelling approach",
volume = "165",
pages = "71-80",
doi = "10.1016/j.gexplo.2016.03.004"
}
Marković, J. P., Jović, M. D., Smičiklas, I. D., Pezo, L., Šljivić-Ivanović, M. Z., Onjia, A. E.,& Popović, A. R. (2016). Chemical speciation of metals in unpolluted soils of different types: Correlation with soil characteristics and an ANN modelling approach.
Journal of Geochemical Exploration, 165, 71-80.
https://doi.org/10.1016/j.gexplo.2016.03.004
Marković JP, Jović MD, Smičiklas ID, Pezo L, Šljivić-Ivanović MZ, Onjia AE, Popović AR. Chemical speciation of metals in unpolluted soils of different types: Correlation with soil characteristics and an ANN modelling approach. Journal of Geochemical Exploration. 2016;165:71-80
Marković Jelena P., Jović Mihajlo D., Smičiklas Ivana D., Pezo Lato, Šljivić-Ivanović Marija Z., Onjia Antonije E., Popović Aleksandar R., "Chemical speciation of metals in unpolluted soils of different types: Correlation with soil characteristics and an ANN modelling approach" Journal of Geochemical Exploration, 165 (2016):71-80,
https://doi.org/10.1016/j.gexplo.2016.03.004 .
18
16
18

Elemental analysis of mussels and possible health risks arising from their consumption as a food: The case of Boka Kotorska Bay, Adriatic Sea

Tanaskovski, Bojan; Jović, Mihajlo D.; Mandic, Milica; Pezo, Lato; Degetto, Sandro; Stanković, Slavka

(2016)

TY  - JOUR
AU  - Tanaskovski, Bojan
AU  - Jović, Mihajlo D.
AU  - Mandic, Milica
AU  - Pezo, Lato
AU  - Degetto, Sandro
AU  - Stanković, Slavka
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1099
AB  - The present study investigated the essential and non-essential elements in cultivated and wild mussels and assessed the health risk arising from their consumption as an impact of rapid growth and intensive production of Mytilus galloprovincialis in the mussel farms of the Boka Kotorska Bay. The concentrations of macro, micro, nonessential and even the small amounts of potentially toxic elements in the cultivated and wild mussels were influenced by industry, tourism and the geohydrology of the Bay. In the case of cultivated mussels, the limiting factor, i.e., the element the elevated concentration of which restricts mussels consumption, was Zr, while in the case of wild mussels the limiting factors were Cr and As. The sites with cultivated mussels stand out as sites with the highest calculated element pollution index, the total hazard index and with higher estimated risk to the health of consumers. (C) 2016 Elsevier Inc. All rights reserved.
T2  - Ecotoxicology and Environmental Safety
T1  - Elemental analysis of mussels and possible health risks arising from their consumption as a food: The case of Boka Kotorska Bay, Adriatic Sea
VL  - 130
SP  - 65
EP  - 73
DO  - 10.1016/j.ecoenv.2016.04.007
ER  - 
@article{
author = "Tanaskovski, Bojan and Jović, Mihajlo D. and Mandic, Milica and Pezo, Lato and Degetto, Sandro and Stanković, Slavka",
year = "2016",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/1099",
abstract = "The present study investigated the essential and non-essential elements in cultivated and wild mussels and assessed the health risk arising from their consumption as an impact of rapid growth and intensive production of Mytilus galloprovincialis in the mussel farms of the Boka Kotorska Bay. The concentrations of macro, micro, nonessential and even the small amounts of potentially toxic elements in the cultivated and wild mussels were influenced by industry, tourism and the geohydrology of the Bay. In the case of cultivated mussels, the limiting factor, i.e., the element the elevated concentration of which restricts mussels consumption, was Zr, while in the case of wild mussels the limiting factors were Cr and As. The sites with cultivated mussels stand out as sites with the highest calculated element pollution index, the total hazard index and with higher estimated risk to the health of consumers. (C) 2016 Elsevier Inc. All rights reserved.",
journal = "Ecotoxicology and Environmental Safety",
title = "Elemental analysis of mussels and possible health risks arising from their consumption as a food: The case of Boka Kotorska Bay, Adriatic Sea",
volume = "130",
pages = "65-73",
doi = "10.1016/j.ecoenv.2016.04.007"
}
Tanaskovski, B., Jović, M. D., Mandic, M., Pezo, L., Degetto, S.,& Stanković, S. (2016). Elemental analysis of mussels and possible health risks arising from their consumption as a food: The case of Boka Kotorska Bay, Adriatic Sea.
Ecotoxicology and Environmental Safety, 130, 65-73.
https://doi.org/10.1016/j.ecoenv.2016.04.007
Tanaskovski B, Jović MD, Mandic M, Pezo L, Degetto S, Stanković S. Elemental analysis of mussels and possible health risks arising from their consumption as a food: The case of Boka Kotorska Bay, Adriatic Sea. Ecotoxicology and Environmental Safety. 2016;130:65-73
Tanaskovski Bojan, Jović Mihajlo D., Mandic Milica, Pezo Lato, Degetto Sandro, Stanković Slavka, "Elemental analysis of mussels and possible health risks arising from their consumption as a food: The case of Boka Kotorska Bay, Adriatic Sea" Ecotoxicology and Environmental Safety, 130 (2016):65-73,
https://doi.org/10.1016/j.ecoenv.2016.04.007 .
1
9
8
10

The geochemistry model of the surface sediment determined by using ED-XRF technique: a case study of the Boka Kotorska bay, Adriatic Sea

Tanaskovski, Bojan; Jović, Mihajlo D.; Milicic, Ljiljana; Pezo, Lato; Mandic, Milica; Stanković, Slavka

(2016)

TY  - JOUR
AU  - Tanaskovski, Bojan
AU  - Jović, Mihajlo D.
AU  - Milicic, Ljiljana
AU  - Pezo, Lato
AU  - Mandic, Milica
AU  - Stanković, Slavka
PY  - 2016
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/1111
AB  - The spatial distribution of major oxides (Na2O, K2O, SiO2, Al2O3, Fe2O3, CaO, MgO, MnO, TiO2, P2O5) and numerous elements (Cr, Co, Ni, Cu, Zn, As, Se, Pb, Sn, Sb, Ba, Sr, Br, Rb, Zr, Mo, Cs, Y, V, Ga, La, U, Th, Nb, W, Sc, Ge, Gd, Yb, Hf, and Ce) was determined by using energy dispersive X-ray fluorescence spectrometry on the basis of previously measured organic matter and carbonates. The optimal measuring variables for the investigated oxides and elements were determined by using five standard reference materials. The carbonated sediment type can be determined on the basis of the highest Sr, Sc, La, Nb, Hf, and Yb concentrations followed with the lowest concentrations of the remaining elements and the negative Ce anomaly. The complexity of the obtained data was also examined by principal component analysis (PCA) and cluster analysis (CA) in the identifying geochemical composition of the surface sediment. Boka Kotorska bays geographical position, orographical configuration, and hydrographic characteristics influence the geochemistry model of the surface sediment, quite different from the open sea.
T2  - Environmental Science and Pollution Research
T1  - The geochemistry model of the surface sediment determined by using ED-XRF technique: a case study of the Boka Kotorska bay, Adriatic Sea
VL  - 23
IS  - 12
SP  - 11777
EP  - 11789
DO  - 10.1007/s11356-016-6353-6
ER  - 
@article{
author = "Tanaskovski, Bojan and Jović, Mihajlo D. and Milicic, Ljiljana and Pezo, Lato and Mandic, Milica and Stanković, Slavka",
year = "2016",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/1111",
abstract = "The spatial distribution of major oxides (Na2O, K2O, SiO2, Al2O3, Fe2O3, CaO, MgO, MnO, TiO2, P2O5) and numerous elements (Cr, Co, Ni, Cu, Zn, As, Se, Pb, Sn, Sb, Ba, Sr, Br, Rb, Zr, Mo, Cs, Y, V, Ga, La, U, Th, Nb, W, Sc, Ge, Gd, Yb, Hf, and Ce) was determined by using energy dispersive X-ray fluorescence spectrometry on the basis of previously measured organic matter and carbonates. The optimal measuring variables for the investigated oxides and elements were determined by using five standard reference materials. The carbonated sediment type can be determined on the basis of the highest Sr, Sc, La, Nb, Hf, and Yb concentrations followed with the lowest concentrations of the remaining elements and the negative Ce anomaly. The complexity of the obtained data was also examined by principal component analysis (PCA) and cluster analysis (CA) in the identifying geochemical composition of the surface sediment. Boka Kotorska bays geographical position, orographical configuration, and hydrographic characteristics influence the geochemistry model of the surface sediment, quite different from the open sea.",
journal = "Environmental Science and Pollution Research",
title = "The geochemistry model of the surface sediment determined by using ED-XRF technique: a case study of the Boka Kotorska bay, Adriatic Sea",
volume = "23",
number = "12",
pages = "11777-11789",
doi = "10.1007/s11356-016-6353-6"
}
Tanaskovski, B., Jović, M. D., Milicic, L., Pezo, L., Mandic, M.,& Stanković, S. (2016). The geochemistry model of the surface sediment determined by using ED-XRF technique: a case study of the Boka Kotorska bay, Adriatic Sea.
Environmental Science and Pollution Research, 23(12), 11777-11789.
https://doi.org/10.1007/s11356-016-6353-6
Tanaskovski B, Jović MD, Milicic L, Pezo L, Mandic M, Stanković S. The geochemistry model of the surface sediment determined by using ED-XRF technique: a case study of the Boka Kotorska bay, Adriatic Sea. Environmental Science and Pollution Research. 2016;23(12):11777-11789
Tanaskovski Bojan, Jović Mihajlo D., Milicic Ljiljana, Pezo Lato, Mandic Milica, Stanković Slavka, "The geochemistry model of the surface sediment determined by using ED-XRF technique: a case study of the Boka Kotorska bay, Adriatic Sea" Environmental Science and Pollution Research, 23, no. 12 (2016):11777-11789,
https://doi.org/10.1007/s11356-016-6353-6 .
5
2
4

Modified screw conveyor-mixers - Discrete element modeling approach

Pezo, Lato; Jovanović, Aca; Pezo, Milada L.; Čolović, Radmilo; Lončar, Biljana

(2015)

TY  - JOUR
AU  - Pezo, Lato
AU  - Jovanović, Aca
AU  - Pezo, Milada L.
AU  - Čolović, Radmilo
AU  - Lončar, Biljana
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/755
AB  - Screw conveyors are widely used in the food industry, building construction and mining companies, chemical, agricultural and processing industries, mostly for elevating and/or transporting bulk materials over short to medium distances. Despite their apparent simplicity, the improvement of the transport parameters is a very demanding task and designers usually have to rely on data obtained from empirical investigations. In this paper, fifteen horizontal single-pitch screw conveyors with modified geometry and the different lengths were investigated for premixing action, during the transport of materials. All investigations were performed experimentally and numerically, by using Discrete Element Method (DEM). The influences of screw length, observed geometry variations and different types of screw design, on the performances of the screw conveyor-mixer during material transport were explored. The auxiliary mixing action (used to improve the mixing process) was achieved during the transport of the material. The geometry of the screw conveyor is changed by adding three complementary helices oriented in the same or the opposite direction from screw blades. The particles of the material being transported tumble down from the top of the helix to the next free surface, and that segment of helix was used for additional mixing action. According to experiments and DEM analysis, the particle path length is increased, with the observed modification of screw conveyor, and the improved geometry could be determined for increasing the quality of mixing. (C) 2015 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.
T2  - Advanced Powder Technology
T1  - Modified screw conveyor-mixers - Discrete element modeling approach
VL  - 26
IS  - 5
SP  - 1391
EP  - 1399
DO  - 10.1016/j.apt.2015.07.016
ER  - 
@article{
author = "Pezo, Lato and Jovanović, Aca and Pezo, Milada L. and Čolović, Radmilo and Lončar, Biljana",
year = "2015",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/755",
abstract = "Screw conveyors are widely used in the food industry, building construction and mining companies, chemical, agricultural and processing industries, mostly for elevating and/or transporting bulk materials over short to medium distances. Despite their apparent simplicity, the improvement of the transport parameters is a very demanding task and designers usually have to rely on data obtained from empirical investigations. In this paper, fifteen horizontal single-pitch screw conveyors with modified geometry and the different lengths were investigated for premixing action, during the transport of materials. All investigations were performed experimentally and numerically, by using Discrete Element Method (DEM). The influences of screw length, observed geometry variations and different types of screw design, on the performances of the screw conveyor-mixer during material transport were explored. The auxiliary mixing action (used to improve the mixing process) was achieved during the transport of the material. The geometry of the screw conveyor is changed by adding three complementary helices oriented in the same or the opposite direction from screw blades. The particles of the material being transported tumble down from the top of the helix to the next free surface, and that segment of helix was used for additional mixing action. According to experiments and DEM analysis, the particle path length is increased, with the observed modification of screw conveyor, and the improved geometry could be determined for increasing the quality of mixing. (C) 2015 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved.",
journal = "Advanced Powder Technology",
title = "Modified screw conveyor-mixers - Discrete element modeling approach",
volume = "26",
number = "5",
pages = "1391-1399",
doi = "10.1016/j.apt.2015.07.016"
}
Pezo, L., Jovanović, A., Pezo, M. L., Čolović, R.,& Lončar, B. (2015). Modified screw conveyor-mixers - Discrete element modeling approach.
Advanced Powder Technology, 26(5), 1391-1399.
https://doi.org/10.1016/j.apt.2015.07.016
Pezo L, Jovanović A, Pezo ML, Čolović R, Lončar B. Modified screw conveyor-mixers - Discrete element modeling approach. Advanced Powder Technology. 2015;26(5):1391-1399
Pezo Lato, Jovanović Aca, Pezo Milada L., Čolović Radmilo, Lončar Biljana, "Modified screw conveyor-mixers - Discrete element modeling approach" Advanced Powder Technology, 26, no. 5 (2015):1391-1399,
https://doi.org/10.1016/j.apt.2015.07.016 .
26
21
31

Can the origin of some metals in the seagrass Posidonia oceanica be determined by the indexes of metals pollutions?

Stanković, Slavka; Jović, Mihajlo D.; Tanaskovski, Bojan; Mihajlovic, Marija L.; Joksimovic, Danijela; Pezo, Lato

(2015)

TY  - JOUR
AU  - Stanković, Slavka
AU  - Jović, Mihajlo D.
AU  - Tanaskovski, Bojan
AU  - Mihajlovic, Marija L.
AU  - Joksimovic, Danijela
AU  - Pezo, Lato
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/557
AB  - To assess metal pollution, Fe, Mn, Cu, Zn, Pb, Ni, Co, As, Cd, and Hg contents in samples of the seagrass Posidonia oceanica and surface sediment, collected at eight locations along the Montenegrin coast, were determined. The metal pollution index (MPI) and metal enrichment factor (EF) were then calculated. MPI and EF were lower in sediment than in P. oceanica at the same locations. This was very evident for EF values of Hg and Cd. Based on the Pearsons correlations and EF values, it was possible to conclude that the last two metals content in the seagrass did not originate from the crustal sources or natural weathering processes.
T2  - Environmental Science and Pollution Research
T1  - Can the origin of some metals in the seagrass Posidonia oceanica be determined by the indexes of metals pollutions?
VL  - 22
IS  - 11
SP  - 8253
EP  - 8263
DO  - 10.1007/s11356-014-3953-x
ER  - 
@article{
author = "Stanković, Slavka and Jović, Mihajlo D. and Tanaskovski, Bojan and Mihajlovic, Marija L. and Joksimovic, Danijela and Pezo, Lato",
year = "2015",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/557",
abstract = "To assess metal pollution, Fe, Mn, Cu, Zn, Pb, Ni, Co, As, Cd, and Hg contents in samples of the seagrass Posidonia oceanica and surface sediment, collected at eight locations along the Montenegrin coast, were determined. The metal pollution index (MPI) and metal enrichment factor (EF) were then calculated. MPI and EF were lower in sediment than in P. oceanica at the same locations. This was very evident for EF values of Hg and Cd. Based on the Pearsons correlations and EF values, it was possible to conclude that the last two metals content in the seagrass did not originate from the crustal sources or natural weathering processes.",
journal = "Environmental Science and Pollution Research",
title = "Can the origin of some metals in the seagrass Posidonia oceanica be determined by the indexes of metals pollutions?",
volume = "22",
number = "11",
pages = "8253-8263",
doi = "10.1007/s11356-014-3953-x"
}
Stanković, S., Jović, M. D., Tanaskovski, B., Mihajlovic, M. L., Joksimovic, D.,& Pezo, L. (2015). Can the origin of some metals in the seagrass Posidonia oceanica be determined by the indexes of metals pollutions?.
Environmental Science and Pollution Research, 22(11), 8253-8263.
https://doi.org/10.1007/s11356-014-3953-x
Stanković S, Jović MD, Tanaskovski B, Mihajlovic ML, Joksimovic D, Pezo L. Can the origin of some metals in the seagrass Posidonia oceanica be determined by the indexes of metals pollutions?. Environmental Science and Pollution Research. 2015;22(11):8253-8263
Stanković Slavka, Jović Mihajlo D., Tanaskovski Bojan, Mihajlovic Marija L., Joksimovic Danijela, Pezo Lato, "Can the origin of some metals in the seagrass Posidonia oceanica be determined by the indexes of metals pollutions?" Environmental Science and Pollution Research, 22, no. 11 (2015):8253-8263,
https://doi.org/10.1007/s11356-014-3953-x .
11
8
10

Application of Peleg Model on Mass Transfer Kinetics During Osmotic Dehydratation of Pear Cubes in Sucrose Solution

Pavelkic, Vesna M.; Brdarić, Tanja; Petrovic, Marija P.; Sekularac, Gavrilo M.; Kosevic, Milica G.; Pezo, Lato; Ilic, Marija A.

(2015)

TY  - JOUR
AU  - Pavelkic, Vesna M.
AU  - Brdarić, Tanja
AU  - Petrovic, Marija P.
AU  - Sekularac, Gavrilo M.
AU  - Kosevic, Milica G.
AU  - Pezo, Lato
AU  - Ilic, Marija A.
PY  - 2015
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/944
AB  - The applicability of Peleg model was investigated for predicting mass transfer kinetics during the osmotic dehydration (OD) process of pears, at different concentrations (40, 60 and 70%, w/w) and temperatures (20, 35 and 50 degrees C) of sucrose solution. Increase in sucrose solution concentration resulted in higher water loss (WL) and solid gain (SG) values through the osmotic treatment period. After 360 min of osmotic treatment of pears, WL ranged from 23.71 to 31.68% at 20 degrees C, from 24.80 to 40.38% at 35 degrees C and from 33.30 to 52.07% at 50 degrees C of initial weight of pears. The increase of dry mass of the samples, SG, after 360 min of osmotic treatment ranged from 3.02 to 6.68% at 20 degrees C, from 4.15 to 7.71% at 35 degrees C and from 5.00 to 8.92% at 50 degrees C. Pelegs rate constants, k(1)(WL) and k(1)(SG), decreased with increasing temperature, as well as decreased with increasing concentration of osmotic solution at constant temperature. Both capacity constants k(2)(WL) and k(2)(SG) also exhibited the inverse relationship between capacity constant and temperature, as well as concentration of the osmotic solution. Pelegs rate constants for WL and SG at all temperatures followed an Arrhenius type relationship. The predicted equilibrium values were very close to experimental ones, which was confirmed with high coefficients of determination and by the residual analysis.
T2  - Chemical Industry and Chemical Engineering Quarterly / CICEQ
T1  - Application of Peleg Model on Mass Transfer Kinetics During Osmotic Dehydratation of Pear Cubes in Sucrose Solution
VL  - 21
IS  - 4
SP  - 485
EP  - 492
DO  - 10.2298/CICEQ141014004P
ER  - 
@article{
author = "Pavelkic, Vesna M. and Brdarić, Tanja and Petrovic, Marija P. and Sekularac, Gavrilo M. and Kosevic, Milica G. and Pezo, Lato and Ilic, Marija A.",
year = "2015",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/944",
abstract = "The applicability of Peleg model was investigated for predicting mass transfer kinetics during the osmotic dehydration (OD) process of pears, at different concentrations (40, 60 and 70%, w/w) and temperatures (20, 35 and 50 degrees C) of sucrose solution. Increase in sucrose solution concentration resulted in higher water loss (WL) and solid gain (SG) values through the osmotic treatment period. After 360 min of osmotic treatment of pears, WL ranged from 23.71 to 31.68% at 20 degrees C, from 24.80 to 40.38% at 35 degrees C and from 33.30 to 52.07% at 50 degrees C of initial weight of pears. The increase of dry mass of the samples, SG, after 360 min of osmotic treatment ranged from 3.02 to 6.68% at 20 degrees C, from 4.15 to 7.71% at 35 degrees C and from 5.00 to 8.92% at 50 degrees C. Pelegs rate constants, k(1)(WL) and k(1)(SG), decreased with increasing temperature, as well as decreased with increasing concentration of osmotic solution at constant temperature. Both capacity constants k(2)(WL) and k(2)(SG) also exhibited the inverse relationship between capacity constant and temperature, as well as concentration of the osmotic solution. Pelegs rate constants for WL and SG at all temperatures followed an Arrhenius type relationship. The predicted equilibrium values were very close to experimental ones, which was confirmed with high coefficients of determination and by the residual analysis.",
journal = "Chemical Industry and Chemical Engineering Quarterly / CICEQ",
title = "Application of Peleg Model on Mass Transfer Kinetics During Osmotic Dehydratation of Pear Cubes in Sucrose Solution",
volume = "21",
number = "4",
pages = "485-492",
doi = "10.2298/CICEQ141014004P"
}
Pavelkic, V. M., Brdarić, T., Petrovic, M. P., Sekularac, G. M., Kosevic, M. G., Pezo, L.,& Ilic, M. A. (2015). Application of Peleg Model on Mass Transfer Kinetics During Osmotic Dehydratation of Pear Cubes in Sucrose Solution.
Chemical Industry and Chemical Engineering Quarterly / CICEQ, 21(4), 485-492.
https://doi.org/10.2298/CICEQ141014004P
Pavelkic VM, Brdarić T, Petrovic MP, Sekularac GM, Kosevic MG, Pezo L, Ilic MA. Application of Peleg Model on Mass Transfer Kinetics During Osmotic Dehydratation of Pear Cubes in Sucrose Solution. Chemical Industry and Chemical Engineering Quarterly / CICEQ. 2015;21(4):485-492
Pavelkic Vesna M., Brdarić Tanja, Petrovic Marija P., Sekularac Gavrilo M., Kosevic Milica G., Pezo Lato, Ilic Marija A., "Application of Peleg Model on Mass Transfer Kinetics During Osmotic Dehydratation of Pear Cubes in Sucrose Solution" Chemical Industry and Chemical Engineering Quarterly / CICEQ, 21, no. 4 (2015):485-492,
https://doi.org/10.2298/CICEQ141014004P .
3
6
8

DEM/CFD analysis of granular flow in static mixers

Jovanović, Aca; Pezo, Milada L.; Pezo, Lato; Levic, Ljubinko

(2014)

TY  - JOUR
AU  - Jovanović, Aca
AU  - Pezo, Milada L.
AU  - Pezo, Lato
AU  - Levic, Ljubinko
PY  - 2014
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/87
AB  - Mixing of powders, particles and/or granules obtains an economic importance in various technologies, and in the food, pharmaceutical and chemical industries. In many cases, the mixing process greatly influences the quality of the final product. The parameters of the mixing process and the design of equipment have a strong impact on the mixing efficiency, and the quality and the price of the intermediate or final product. In this study, the discrete element method (DEM) is used for modeling of granular flow in various multiple Komax and Ross mixing applications. Computational fluid dynamic (CFD) method was used for modeling of fluid flow through the Eulerian multiphase model. Coupling of these two methods provides reliable, sufficiently correct and adequate results of the proposed model compared to experimental measurements. The objective of this paper is to predict the behavior of particles in different static mixer configurations. The results of the numerical simulation are compared with appropriate experimental results. Application of this model provides the optimization of the geometry and parameters of mixing systems taking into account the quality of the mixing process and the cost of the final product. (C) 2014 Elsevier B.V. All rights reserved.
T2  - Powder Technology
T1  - DEM/CFD analysis of granular flow in static mixers
VL  - 266
SP  - 240
EP  - 248
DO  - 10.1016/j.powtec.2014.06.032
ER  - 
@article{
author = "Jovanović, Aca and Pezo, Milada L. and Pezo, Lato and Levic, Ljubinko",
year = "2014",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/87",
abstract = "Mixing of powders, particles and/or granules obtains an economic importance in various technologies, and in the food, pharmaceutical and chemical industries. In many cases, the mixing process greatly influences the quality of the final product. The parameters of the mixing process and the design of equipment have a strong impact on the mixing efficiency, and the quality and the price of the intermediate or final product. In this study, the discrete element method (DEM) is used for modeling of granular flow in various multiple Komax and Ross mixing applications. Computational fluid dynamic (CFD) method was used for modeling of fluid flow through the Eulerian multiphase model. Coupling of these two methods provides reliable, sufficiently correct and adequate results of the proposed model compared to experimental measurements. The objective of this paper is to predict the behavior of particles in different static mixer configurations. The results of the numerical simulation are compared with appropriate experimental results. Application of this model provides the optimization of the geometry and parameters of mixing systems taking into account the quality of the mixing process and the cost of the final product. (C) 2014 Elsevier B.V. All rights reserved.",
journal = "Powder Technology",
title = "DEM/CFD analysis of granular flow in static mixers",
volume = "266",
pages = "240-248",
doi = "10.1016/j.powtec.2014.06.032"
}
Jovanović, A., Pezo, M. L., Pezo, L.,& Levic, L. (2014). DEM/CFD analysis of granular flow in static mixers.
Powder Technology, 266, 240-248.
https://doi.org/10.1016/j.powtec.2014.06.032
Jovanović A, Pezo ML, Pezo L, Levic L. DEM/CFD analysis of granular flow in static mixers. Powder Technology. 2014;266:240-248
Jovanović Aca, Pezo Milada L., Pezo Lato, Levic Ljubinko, "DEM/CFD analysis of granular flow in static mixers" Powder Technology, 266 (2014):240-248,
https://doi.org/10.1016/j.powtec.2014.06.032 .
29
25
37

Antioxidant activity of propolis extracts from Serbia: A polarographic approach

Potkonjak, Nebojša I.; Veselinović, Dragan S.; Novaković, Miroslav M.; Gorjanovic, Stanislava Z.; Pezo, Lato; Suznjevic, Desanka Z.

(2012)

TY  - JOUR
AU  - Potkonjak, Nebojša I.
AU  - Veselinović, Dragan S.
AU  - Novaković, Miroslav M.
AU  - Gorjanovic, Stanislava Z.
AU  - Pezo, Lato
AU  - Suznjevic, Desanka Z.
PY  - 2012
UR  - http://vinar.vin.bg.ac.rs/handle/123456789/5101
AB  - Antioxidant activity (AO) of commercial propolis extracts (PEs), available on Serbian market, was determined by direct current (DC) polarography. Polarographic anodic current of 5.0 mmol L-1 alkaline solution of H2O2 was recorded at potentials of mercury dissolution. Decrease of the current was plotted against the volume of gradually added PEs. The volume of PE causing 20% current decrease was determined from the linear part of the plot. Antioxidant activity was expressed in H2O2 equivalent (HPEq), representing the volume of PE that corresponds to 1.0 mmol L-1 H2O2 decrease. Resulting HPEq ranged between 1.71 +/- 0.11 and 8.00 +/- 0.18 mu L. Range of 1,1-dipheny1-2-picryl hydrazyl (DPPH) radical scavenging activity was from 0.093 +/- 0.004% to 0.346 +/- 0.006%. Total phenolic content (TCP) of PE with superior AO activity was 5.31 +/- 0.05%g GAE, while the extract with the lowest activity contained 1.45 +/- 0.02%g GAE. Antioxidant activity, determined by polarographic method, was correlated with DPPH scavenging activity (R-2 = 0.991) and TCP (R-2 = 0.985). Validity of obtained results was further confirmed using ANOVA and post hoc Tukey HSD test. (C) 2012 Elsevier Ltd. All rights reserved.
T2  - Food and Chemical Toxicology
T1  - Antioxidant activity of propolis extracts from Serbia: A polarographic approach
VL  - 50
IS  - 10
SP  - 3614
EP  - 3618
DO  - 10.1016/j.fct.2012.07.029
ER  - 
@article{
author = "Potkonjak, Nebojša I. and Veselinović, Dragan S. and Novaković, Miroslav M. and Gorjanovic, Stanislava Z. and Pezo, Lato and Suznjevic, Desanka Z.",
year = "2012",
url = "http://vinar.vin.bg.ac.rs/handle/123456789/5101",
abstract = "Antioxidant activity (AO) of commercial propolis extracts (PEs), available on Serbian market, was determined by direct current (DC) polarography. Polarographic anodic current of 5.0 mmol L-1 alkaline solution of H2O2 was recorded at potentials of mercury dissolution. Decrease of the current was plotted against the volume of gradually added PEs. The volume of PE causing 20% current decrease was determined from the linear part of the plot. Antioxidant activity was expressed in H2O2 equivalent (HPEq), representing the volume of PE that corresponds to 1.0 mmol L-1 H2O2 decrease. Resulting HPEq ranged between 1.71 +/- 0.11 and 8.00 +/- 0.18 mu L. Range of 1,1-dipheny1-2-picryl hydrazyl (DPPH) radical scavenging activity was from 0.093 +/- 0.004% to 0.346 +/- 0.006%. Total phenolic content (TCP) of PE with superior AO activity was 5.31 +/- 0.05%g GAE, while the extract with the lowest activity contained 1.45 +/- 0.02%g GAE. Antioxidant activity, determined by polarographic method, was correlated with DPPH scavenging activity (R-2 = 0.991) and TCP (R-2 = 0.985). Validity of obtained results was further confirmed using ANOVA and post hoc Tukey HSD test. (C) 2012 Elsevier Ltd. All rights reserved.",
journal = "Food and Chemical Toxicology",
title = "Antioxidant activity of propolis extracts from Serbia: A polarographic approach",
volume = "50",
number = "10",
pages = "3614-3618",
doi = "10.1016/j.fct.2012.07.029"
}
Potkonjak, N. I., Veselinović, D. S., Novaković, M. M., Gorjanovic, S. Z., Pezo, L.,& Suznjevic, D. Z. (2012). Antioxidant activity of propolis extracts from Serbia: A polarographic approach.
Food and Chemical Toxicology, 50(10), 3614-3618.
https://doi.org/10.1016/j.fct.2012.07.029
Potkonjak NI, Veselinović DS, Novaković MM, Gorjanovic SZ, Pezo L, Suznjevic DZ. Antioxidant activity of propolis extracts from Serbia: A polarographic approach. Food and Chemical Toxicology. 2012;50(10):3614-3618
Potkonjak Nebojša I., Veselinović Dragan S., Novaković Miroslav M., Gorjanovic Stanislava Z., Pezo Lato, Suznjevic Desanka Z., "Antioxidant activity of propolis extracts from Serbia: A polarographic approach" Food and Chemical Toxicology, 50, no. 10 (2012):3614-3618,
https://doi.org/10.1016/j.fct.2012.07.029 .
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