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New functionalities in cellulosic fibers developed by chemical modification / Celulozna vlakna novih funkcionalnih svojstava dobijanja hemijskim modifikovanjem
(Univerzitet u Nišu - Tehnološki fakultet, Leskovac, 2007)
This paper gives an overview of the current state in the field of cellulosic fibers functionalization by chemical modification. Emphasis is placed on the selective (periodate and TEMPO oxidation) and non-selective (permanganate ...
XPS and contact angle study of cotton surface oxidation by catalytic bleaching
(Elsevier Science Bv, Amsterdam, 2007)
Surface chemistry and wetting properties of cotton fibres as affected by catalytic bleaching have been investigated. Two types of cotton fabric have been analysed: the regular and a model cotton fabric. In the regular - ...
Synthesis and settings behavior of alpha-TCP from calcium deficient hyroxyapatite obtained by hydrothermal method
(Natl Inst Optoelectronics, Bucharest-Magurele, 2007)
The aim of this work is the investigation of alpha-tricalcium-phosphate (alpha-TCP) formation from calcium-deficient hydroxyapatite (CDHAP), synthesized by hydrothermal method from CaCl2, EDTA, NaH2PO4 center dot 2H(2)O ...
Sintering behaviour of nanosized HAP powder
(Trans Tech Publications Ltd, Durnten-Zurich, 2007)
The influences of temperature and time on sintering behaviour of nanosized HAP powder were investigate in this paper. The calcium hydroxyapatite powder, with the average crystallite size of 34 +/- 1 nm, was uniaxially ...
Substituent and structural effects on the kinetics of the reaction of N-(substituted phenylmethylene)-m- and -p-aminobenzoic acids with diazodiphenylmethane / Efekti supstituenata i strukture na kinetiku reakcije N-(supstituisanih)-m- i -p-aminobenzoevih kiselina sa diazodifenilmetanom
(Serbian Chemical Society, Belgrade, 2007)
The rate constants for the reaction of twenty-two N-(substituted phenylmethylene)- m- and -p-aminobenzoic acids with diazodiphenylmethane were determined in absolute ethanol at 30 °C. The effects of substituents on the ...
The effect of substrate polarity on the lipase-catalyzed synthesis of aroma esters in solvent-free systems
(Elsevier, Amsterdam, 2007)
The aim of this study was to compare activities of commercial lipases in synthesis of various esters in solvent-free system and in isooctane. Moreover, the effect of substrate polarity (expressed as log P) on solvent-free ...
Carbon-13 substituent chemical shifts in N-1-p-substituted phenyl-5-methyl-4-carboxy uracils
(Elsevier Science Bv, Amsterdam, 2007)
The C-13 NMR chemical shifts of seven N-1-p-substituted phenyl-5-methyl-4-carboxy uracils have been measured in deuterated dimethyl sulfoxide (DMSO-d sigma). The correlation analysis for the substituent-induced chemical ...
Size and surface effects on the MRI relaxivity of manganese ferrite nanoparticle contrast agents
(Amer Chemical Soc, Washington, 2007)
Superparamagnetic MnFe2O4 nanocrystals of different sizes were synthesized in high-boiling ether solvent and transferred into water using three different approaches. First, we applied a ligand exchange in order to form a ...
The effect of fermentation medium composition on lipase production by yeast Candida utilis / Uticaj sastava fermentacione podloge na prinos produkovanih lipaza pomoću kvasca Candida utilis
(Univerzitet u Nišu - Tehnološki fakultet, Leskovac, 2007)
In this work lipolytic activity of various microorganisms isolated from spoiled soybean oil was studied. Wild yeast strain identified as Candida utilis was chosen for the producing microorganism based on the activity shown ...
Threshold voltage in MOSFETs and MODFETs as a problem of nonlinear dynamics
(Natl Inst Optoelectronics, Bucharest-Magurele, 2007)
A widely known (and also very well examined) problem of threshold voltage in MOSFETs and MODFETs has been described with the tools of nonlinear dynamics. Some interesting features of such devices have been derived, together ...