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Приказ резултата 1951-1960 од 2086
Dual responsive antibacterial Ag-poly(N-isopropylacrylamide/itaconic acid) hydrogel nanocomposites synthesized by gamma irradiation
(European Polymer Journal, 2015)
Thermo- and pH-sensitive Ag-P(NiPAAm/IA) hydrogel nanocomposites were prepared by in situ reduction of Ag+ ions with gamma irradiation. P(NiPAAm/IA) copolymer hydrogel matrices have been previously synthesized by radiation ...
Crystallinity changes and melting behavior of the uniaxially oriented iPP exposed to high doses of gamma radiation
(Polymer Degradation and Stability, 2005)
Samples of isotactic polypropylene (iPP) oriented via solid-state stretching at elevated temperature (draw ratios of 1, 3, 5, 7.5, 10, 12.5 and 15) were analyzed. Gel content measurements, wide-angle X-ray diffraction ...
Modelling the position of analyte emission maxima in low temperature direct current arc plasma using statistical procedures
(Spectrochimica Acta. Part B: Atomic Spectroscopy, 2012)
In low temperature argon arc plasma, emission spectral lines of different analytes have characteristic radial distributions with emission maxima distributed over a wide plasma region, from the arc axis toward the arc ...
Principal component analysis of the main factors of line intensity enhancements observed in oscillating direct current plasma
(Spectrochimica Acta. Part B: Atomic Spectroscopy, 2010)
Enhancement of emission line intensities by induced oscillations of direct current (DC) arc plasma with continuous aerosol sample supply was investigated using multivariate statistics. Principal component analysis (PCA) ...
The effect of potassium addition on plasma parameters in argon dc plasma arc
(Journal of Physics. D: Applied Physics, 2010)
The effect of potassium addition on the radial distribution of temperature and electron number density in a U-shaped direct current (dc) argon plasma operating at different arc currents has been studied by optical emission ...
Temporal responses of spectral line intensities emitted by d.c. arc plasma with aerosol supply studied by power interruption technique
(Spectrochimica Acta. Part B: Atomic Spectroscopy, 2003)
The responses to the fast interruption of the arc current have been studied for the spectral line intensities of several elements emitted by U-shaped direct current (d.c.) arc plasma with aerosol supply. The arc was burned ...
Electron spin resonance study of the kerogen/asphaltene vanadyl porphyrins: air oxidation
(Fuel, 2001)
Thermal behavior of vanadyl porphyrins was studied by electron spin resonance during heating of the kerogens isolated from the La Luna (Venezuela), Maganik(Montenegro) and Serpiano (Switzerland) bituminous rocks at 150 and ...
Study of aerosol sample interaction with dc plasma in the presence of oscillating magnetic field
(Spectrochimica Acta. Part B: Atomic Spectroscopy, 2005)
Oscillating magnetic field was used to Study the efficiency of the aerosol sample introduction into the dc plasma. At atmospheric plasmas, the effect of magnetic field is reduced to Lorentz forces on the current carrying ...
The role of demixing effect in analyte emission enhancement by easily ionized elements in d.c. plasma
(Spectrochimica Acta. Part B: Atomic Spectroscopy, 2000)
The effect of easily ionized elements (EIE) in d.c. plasma (DCP) has been modeled and experimentally investigated. The introduction of the EIEs in the U-shaped DCP decreases a potential barrier due to an internal radial ...
Vanadium of petroleum asphaltenes and source kerogens (La Luna Formation, Venezuela): isotopic study and origin
(Fuel, 2002)
High-resolution mass spectrometry indicates that the isotopic abundance of (50)vanadium (V) of the Late Cretaceous La Luna petroleum asphaltenes and related source kerogens of marine origin (both highly enriched with V GT ...