Претраживање
Приказ резултата 1511-1520 од 1678
Geochemistry of Ni in the Cretaceous-Tertiary succession Fiskeler (Fish Clay) at Stevns Klint (Denmark): cheto-smectite of the black marl
(Journal of the Serbian Chemical Society, 2006)
The Cretaceus-Tertiary (KT) boundary at Stevns Klint (the Hojerup succession), Fiskeler, consists of a thin red clay layer overlain by a thick one of black marl. These two layers are made up mainly from cheto-smectite and ...
Cretaceous-paleogene boundary fish clay at hojerup (Stevns Klint, Denmark): Zn, Pb and PEE in kerogen
(Journal of the Serbian Chemical Society, 2008)
Geochemical analyses of Zn, Pb and rare earth elements (La, Ce, Nd, Sm, Eu, Tb, Yb and Lu) in the kerogen of the black marl at the Cretaceous - Paleogene boundary Fish Clay at Hojerup were performed. Substantial proportions ...
A power interruption technique for determining the difference between electron and gas temperatures in the argon d.c. arc supplied with aqueous aerosol
(Spectroscopy Letters, 2003)
The difference between electron and gas temperatures in a low current U-shaped d.c. arc with aqueous aerosol supply was studied using a power interruption technique. Monitoring of the temporal evolution of recombination ...
The vanadium isotopic constitution of petroleum asphaltenes: La Luna Formation (Venezuela)
(Journal of the Serbian Chemical Society, 2000)
High resolution mass spectrometry indicates that the isotopic abundance of (50)vanadium (V) of the Late Cretaceous La Luna petroleum asphaltenes and related source kerogen of marine origin (both highly enriched with V GT ...
Some problems connected with boron determination by atomic absorption spectroscopy and the sensitivity improvement
(Journal of the Serbian Chemical Society, 2001)
Two atomizers were compared: an N2O-C2H2 flame and a stabilized U-shaped DC arc with aerosol supply. Both the high plasma temperature and the reducing atmosphere obtained by acetylene addition to the argon stream substantially ...
Experimental study of physical parameters significant in fullerene synthesis
(Journal of the Serbian Chemical Society, 2003)
In this work, the effect of physical parameters on the yield of fullerene, synthesized in a hollow cathode plasma reactor is investigated. The experimental investigations done previously have shown that the fullerene yield ...
Optical diagnostics of fullerene synthesis in the RF thermal plasma process
(Journal of the Serbian Chemical Society, 2005)
In this work, the results of an optical emission study of fullerene synthesis in an inductively coupled radio frequency thermal plasma reactor are presented. The emission spectroscopy studies, based on the use of the Swan ...
Multiple charged nitrogen ion beam irradiation of fullerene thin films
(Fullerenes Nanotubes and Carbon Nanostructures, 2007)
In this work, the results of structural modification of fullerene thin films bombarded by multiple charged nitrogen ions have been reported. The properties of as-deposited and irraditated fullerene thin films have been ...
Optical emission study of RF thermal plasma during fullerene synthesis
(Fullerenes Nanotubes and Carbon Nanostructures, 2005)
Results on studies of molecular spectra emitted in the initial stages of fullerene synthesis during processing of graphite powder in RF thermal plasma conditions are presented in this work. CN-usually present in carbon ...
Synthesis and crystal structure of 1,2,3,4-tetrahydro-9-aminoacridine tetrachlorozincate(II) monohydrate / Sinteza i kristalna struktura 1,2,3,4-tetrahidro-9-aminoakridin-tetrahlorocinkata(II) monohidrata
(Journal of the Serbian Chemical Society, 2010)
In the reaction of ZnCl(2) with tacrine hydrochloride in water novel tetracoordinated (C(13)H(15)N(2))(2)[ZnCl(4)]-H(2)O complex was obtained and characterized by elemental analysis, molar conductivity and X-ray analysis. ...