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Приказ резултата 61-70 од 226
Thermal, oxidative and radiation stability of polyimides. Part IV: Polyimides based on N-[4-benzoyl-2-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)-phenyl]-acetamide and different diamines
(Elsevier Sci Ltd, Oxford, 2007)
Polyimide resins were obtained from the reaction between N-[4-benzoyl-2-(2,5-dioxo-2,5-dihydro-pyrrol-1-yl)-phenyl]-acetamide and the following compounds with terminal amino groups: urea, 4-[(4-aminophenyl)sulfonyl] aniline, ...
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 influence of thermomechanical treatment and chemical composition on recrystallization of Al-Mg alloys
(Savez inženjera metalurgije Srbije, Beograd, 2007)
Recrystallization behaviour of AlMg3, AlMg4.5Mn and AlMg6Mn alloy plates subjected to different thermomechanical treatments (TMTs), has been studied by means of optical microscopy and hardness measurements. Applied two-stage ...
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 ...
New functionalities in cellulosic fibers developed by chemical modification / Celulozna vlakna novih funkcionalnih svojstava dobijena hemijskim modifikovanjem
(Association of Chemical Engineers of Serbia, 2007)
This paper gives an overview of the current state in the field of cellulosic fibers functionalization by chemical modification. The emphasis is placed on the selective (periodate and TEMPO oxidation) and non-selective ...
Crystal structure of potassium lead bismuth oxide hydrate, K-1.09(Bi0.93Pb0.07)O-3 center dot 1/6H(2)O
(Oldenbourg Verlag, Munich, 2007)
Bi0.93H0.33K1.09O3.Pb-17(0.07), cubic, Im (3) over bar (no. 213), a = 10.013(l) angstrom, V = 1003.9 angstrom(3), Z = 12, R-gt(F) = 0.010, wR(ref)(F-2) = 0.023, T = 295 K.
Crystallization shelves for laboratory furnaces
(Wiley-VCH Verlag Gmbh, Weinheim, 2007)
Several designs of air coolers (modular bilateral "crystallization shelves"), installed in laboratory furnaces are presented. The setup allows easy regulation and simultaneous crystallization of several substances at ...
Wall-to-liquid mass transfer in fluidized beds and vertical transport of inert particles / Prenos mase zid-fluid u fluidizovanim slojevima i pri vertikalnom transportu inertnih čestica
(Serbian Chemical Society, Belgrade, 2007)
Mass transfer coefficients in single phase flow, liquid fluidized beds and vertical hydraulic transport of spherical inert particles were studied experimentally using 40 mm and 25.4 mm diameter columns. The mass transfer ...
Kinetic study of the reaction between sodium chloroacetate and potassium ethylxanthogenate / Kinetička ispitivanja reakcije između natrijum-hloracetata i kalijum-etil-ksantata
(Serbian Chemical Society, Belgrade, 2007)
The reaction kinetics of the synthesis of sodium ethyl xanthogeneacetate from potassium ethylxanthogenate and sodium chloroacetate in distilled water as the reaction medium at 25, 30, 35 and 40°C, were investigated. The ...
Bioactive glass and hydroxyapatite thin films obtained by pulsed laser deposition
(Elsevier, Amsterdam, 2007)
Bioactive glass (BG), calcium hydroxyapatite (HA), and ZrO2 doped HA thin films were grown by pulsed laser deposition on Ti substrates. An UV KrF* (lambda = 248 nm, tau gt = 7 ns) excimer laser was used for the multi-pulse ...