Претраживање
Приказ резултата 61-70 од 1825
Uticaj rastvora amonijum-nitrata i natrijum-sulfata na mehanička svojstva i strukturu geopolimera na bazi elektrofilterskog pepela termoelektrana / Effects of ammonium nitrate and sodium sulfate solution on mechanical properties and structure of fly ash based geopolymers
(Univerzitet u Beogradu, Tehnološko-metalurški fakultet, 2015)
Geopolimeri na bazi tri različita uzorka elektrofilterskog pepela izloženi su dejstvu koncentrovanog rastvora NH4NO3 (480 g/dm3) i rastvora Na2SO4 (50 g/dm3) u periodu od 18 meseci. Promene mehaničkih svojstava geopolimera ...
Magnetna i električna svojstva keramičkih kompozitnih materijala na bazi nikl-cink-ferita i barijum-titanata dobijenih postupkom auto-sagorevanja / Magnetic and electric properties of ceramic composite materials based on nikel-zinc ferrite and barium titanate obtained by the auto-combustion route
(Univerzitet u Beogradu, Tehnološko-metalurški fakultet, 2017)
U ovoj doktorskoj disertaciji ispitivana su magneto-električna svojstva kompozitnih materijala koji se sastoje od magnetne faze, nikl-cink ferita, i feroelektrične faze, barijum titanata u razlicitim masenim odnosima. ...
Gradient analysis reveals a copper paradox on floodplain soils under long-term pollution by mining waste
(Elsevier, Amsterdam, 2012)
Arable alluvial soils are a globally important resource under increasing pressure from both industrial pollution and intensified agricultural land use. Quality of agricultural soils is ultimately defined by crop yields; ...
Quantification of compression wood severity in tracheids of Pinus radiata D. Don using confocal fluorescence imaging and spectral deconvolution
(Academic Press Inc Elsevier Science, San Diego, 2010)
Confocal fluorescence microscopy was used to examine the spectral characteristics of lignin autofluorescence in secondary cell walls of normal and compression wood from Pinus radiata. Using UV excitation, fluorescence ...
Intestinal helminths infection of rats (ratus norvegicus) in the Belgrade area (Serbia): the effect of sex, age and habitat
(Edp Sciences S A, Les Ulis Cedex A, 2011)
Gastrointestinal helminths of Norway rat (Rattus norvegicus) from the Belgrade area were studied as a part of a wider ecological research of rats in Serbia (data on the distribution, population ecology, economic and ...
Chemical and antioxidant properties of cultivated and wild fragaria and rubus berries
(Wiley-Hindawi, London, 2011)
Content of individual sugars, organic acids, total phenolics (TPH), some important phenolic compounds (kaempferol, myricetin, quercetin, and ellagic acid) and total antioxidant capacity (TAC) in the fruits of strawberry, ...
Evaluation of the composition and morphology of a WTi/Si system processed by a picosecond laser
(Korean Inst Metals Materials, Seoul, 2012)
In this work we studied the influence of laser radiation on the composition, structure and morphology of WTi thin films deposited on n-type (100) silicon wafers. The films were deposited by d.c. sputtering from a 70:30 at% ...
Solid State Synthesis of Extra Phase-Pure Li4Ti5O12 Spinel
(Međunarodni Institut za nauku o sinterovanju, Beograd, 2011)
Extra phase-pure Li4Ti5O12 spinel with particle sizes less than 500 nm was synthesized by solid state reaction of mechanochemicaly activated mixture of nano anatase and Li2CO3 for a very short annealing time, 4 h at 800 ...
Further study on fructooligosaccharides of Rhodobryum ontariense
(Adac-Cryptogamie, Paris, 2012)
The identification of nystose and 1(F)-beta-fructofuranosylnystose in the oligosaccharide-rich fraction of the moss Rhodobryum ontariense (Kindb.) Kindb. (Bryaceae) by thin layer chromatography and high pressure chromatography ...
Fatty Acids of Some Moss Species from Germany
(Asian Journal Of Chemistry, Sahibabad, 2011)
The fatty acid composition of three mosses collected in Germany was preliminary analyzed by gas chromatography (GC-FID) and gas I chromatography-mass spectrometry (GC-MS) for the first time. It was found that Hypnum ...