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Приказ резултата 121-130 од 183
Supercritical carbon dioxide extraction of carrot fruit oil - Comparison with hydrodistillation and modelling
(CHISA 2006 - 17th International Congress of Chemical and Process Engineering, 2006)
In this study the compositions of Carrot fruit (Daucus carrota, cultivar Chanteney) essential oil obtained by hydrodistillation and its extract obtained by supercritical carbon dioxide extraction at 313 K and 10 MPa were ...
Simplex optimization of artificial neural networks for the prediction of minimum detectable activity in gamma-ray spectrometry
(Elsevier, Amsterdam, 2006)
A three-layer feed-forward artificial neural network (ANN) with a back-propagation learning algorithm was used to predict the minimum detectable activity (AD) of radionuclides (Ra-226, U-238, U-235, K-40, Th-232, Cs-134, ...
Assessment of gamma dose rates from terrestrial exposure in Serbia and Montenegro
(Oxford Univ Press, Oxford, 2006)
The gamma dose rates due to naturally occuring terrestrial radionuclides (Ra-226, Th-232 and K-40) were calculated based on their activities in soil samples, determined by gamma-ray spectrometry. A total of 140 soil samples ...
Optimization of arsenic behavior during concentrate roasting process
(CHISA 2006 - 17th International Congress of Chemical and Process Engineering, 2006)
Copper concentrates almost always contain certain quantity of arsenic, from 0.01-1%. Domestic concentrates processed in Bor Smelting Plant usually contain small quantity of arsenic (0.05-0.15%) except from Bor concentrate ...
A kinetic study of D-glucose oxidation by bromine in aqueous solutions
(Elsevier Sci Ltd, Oxford, 2006)
The kinetics of the oxidation Of D-glucose to D-gluconic acid by bromine in aqueous solution were studied using potentiometric techniques and theoretical considerations of complex bromine-bromide-pH equilibria. The pH has ...
A kinetic study of the thermal degradation of ammonium species inside a 3D zincophosphate
(Elsevier Science Bv, Amsterdam, 2006)
Ammonium ions remain inside the 3D zincophosphate framework after the hydrothermal crystallization. These species in co-operation with sodium cations exert a specific templating role in the formation of the open-framework ...
Preparation of a-TCP cements from calcium deficient hydroxyapatite obtained by hydrothermal method
(Trans Tech Publications Ltd, Durnten-Zurich, 2006)
In this paper the synthesis of bioactive cement based on al-Ca-3(PO4)(2) (a-TCP) and calcium deficient hydroxyapatite (CDHAp), obtained by hydrothermal method from CaCl2, EDTA, NaH(2)PO(4)(.)12H(2)O and urea at 160 degrees ...
Investigations of cell immobilization in alginate: rheological and electrostatic extrusion studies
(Wiley, Hoboken, 2006)
In this study, the process of electrostatic extrusion as a method for cell immobilization was investigated. We have assessed the effects of concentrations of yeast cells (as a model cell type) and Na alginate on the size ...
Uticaj pratećih komponenata vlakana konoplje na njihovu električnu otpornost / Influence of accompanying substances of hemp fibres on their electric resistance
(Savez hemičara i tehnologa Srbije, 2006)
U cilju iznalaženja zadovoljavajućeg postupka modifikovanja vlakana konoplje u ovom radu su prikazane zavisnosti između hemijskog sastava, finoće i električne otpornosti. Prema proceduri za određivanje hemijskog sastava ...
An evidence for a chain to network transformation during the microwave hydrothermal crystallization of an open-framework zinc terephthalate
(Springer, Dordrecht, 2006)
A 3-D open-framework and a chain-structured zinc terephthalate are obtained by hydrothermal crystallization under microwave heating at 180 degrees C. The study shows that these structures have rather similar principal ...