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Prikaz rezultata 11-20 od 29
Mechanochemical synthesis of gamma-Bi2O3
(Elsevier, Amsterdam, 2004)
A series of gamma-Bi2O3 phases doped with Zn, Si, Pb and Fe was prepared by mechanochemical treatment of corresponding oxide mixtures with a nominal composition 6Bi(2)O(3) (.) MOx (MOx = ZnO, SiO2, PbO) and 12Bi(2)O(3) (.) ...
Investigation of sintering kinetics of NiO using photoacoustic spectroscopy
(Međunarodni Institut za nauku o sinterovanju, Beograd, 2004)
Sintering kinetics of NiO was investigated using photoacoustic spectroscopy. This method was used to follow the change of phase and amplitude of the photoacoustic signal of nickel-oxide samples sintered at 1373 K for 15-240 ...
Senescence-related changes in the antioxidant status of ginkgo and birch leaves during autumn yellowing
(Wiley, Hoboken, 2004)
The antioxidant status of birch and ginkgo leaves during autumnal senescence was characterized by the activities of catalase (CAT), peroxidase (POD), ascorbate peroxidase (APX) and superoxide dismutase (SOD). The contents ...
Changes in sterlet (Acipenser ruthenus L.) catch and length frequency distribution in the Serbian part of the Danube River during the twentieth century
(Polish Academy of Sciences, 2004)
Data from a sample of 262 sterlet (Acipenser ruthenus L.) specimens from the Serbian part of the Danube River were compared with data collected between 1948 and 1967. The recent sample was caught between September 2002 and ...
Photoacoustic properties of sintered NiO
(Walter De Gruyter Gmbh, Berlin, 2004)
The thermal diffusivity of NiO pellets was determined by the photoacoustic technique. A NiO powder, with a purity of 99.95 %, was pressed into pellets 10 mm in diameter. The average agglomerate size of the NiO powder was ...
Pairing in planar organic superconductors
(Institute of Physics,Belgrade Pregrevica 118, Zemun, Serbia and Montenegro, 2004)
The nature of superconductivity in planar organics is still a controversial problem. We investigate theoretically d-wave and anisotropic s-wave pairing in k-(BEDT-TTF)2X compounds. Assuming strong dimerization, we consider ...
Spectrofluorimetric Analysis of Synthetic and isolated lignin from Omorika
(22th International Symposium on Biophysic, 2004)
Lignin is the one of the main constituitive polymers of the plant cell wall that protect plant cell from different kond of stress. Lignin precursors, the plenolic alcohols, belong to the group of phenylpropanoid compounds. ...
Nature of structural changes in LSM-YSZ nanocomposite material during thermal treatments
(Elsevier Science Sa, Lausanne, 2004)
Nanocomposite powders in the system (La1-xSx)(a)MnO3-YSZ((1-y)) [LSM-YSZ], as an attractive cathode material for high operating solid oxide fuel cell (SOFC), were obtained through ultrasonic spray pyrolysis (1.7 MHz) method. ...
Ornithological diagnosis of Ovčarsko-Kablarska Gorge
(Univerzitet Crne Gore-Odsjek za BiologijuRepublički institut za Zaštitu PrirodePrirodnjački muzej Crne GoreUniverzitet Crne Gore-Institut za Biologiju mora, 2004)
Između planinskih masiva Ovčara i Kablara u zapadnoj Srbiji nalazi se klisura, nastala erozivnim radom Zapadne Morave. I pored antropogenih degradacionih procesa, Ovčarsko–Kablarska klisura se i dalje odlikuje velikom ...
Значај производних и социјалних функција букових шума у Србији
(Београд : Министарство шумарства ФНРЈ, 2004)
Klasifikacije funkcija šuma su mnogobrojne i različite, zavisno od vremena u kome su nastale i od kriterijuma prema kojima su sačinjene. Jedna od najsveobuhvatnijih i za naše i evropske uslove najznačajnijih je FAO ...