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Prikaz rezultata 6801-6810 od 6826
The synthesis of nanosized calcium-hydroxyapatite particles by the catalytic decomposition of urea with urease / Sinteza nanostrukturnih prahova kalcijum-hidroksiapatita katalitičkom razgradnjom uree ureazom
(Institut bezbednosti, Beograd, 2004)
In this paper, the synthesis of nanosized calcium-hydroxyapatite particles by the catalytic decomposition of urea with urease is presented. As reagents for the Ca-hydroxyapatite synthesis, the various amounts of CaCl2, ...
Biodiesel I: Historical background, present and future production and standards - professional paper / Biodizel I. - istorijat, proizvodnja i standardi
(Association of Chemical Engineers of Serbia, 2004)
Biodiesel is defined as a fuel which may be used as pure biofuel or at high concentration in mineral oil derivatives, in accordance with specific quality standards for transport applications. The main raw material used for ...
The adhesion of epoxy cataphoretic coating on phosphatized hot-dip galvanized steel / Adhezija epoksidne kataforetske prevlake na fosfatiranom pocinkovanom čeliku
(Association of Chemical Engineers of Serbia, 2006)
The influence of hot-dip galvanized steel surface pretreatment on the adhesion of epoxy cataphoretic coating was investigated. Phosphate coatings were deposited on hot-dip galvanized steel and the influence of fluoride ...
Ionization energies of hypervalent Li2F, Li2Cl and Na2Cl molecules obtained by surface ionization electron impact neutralization mass spectrometry
(John Wiley & Sons Ltd, W Sussex, 2003)
Ionization energies of hypervalent Li2F, Li2Cl and Na2Cl molecules detected by surface ionization electron impact neutralization mass spectrometry are reported. The ionization energies were 3.78 +/- 0.2 eV for Li2F, 4.93 ...
Emulsion stability evaluation using fractal dimensions approach
(8th Conference of the Yugoslav Materials Research Society, 2007)
There are many developed strategies for evaluating emulsion stability, aimed at determining the life circle of emulsions. Most of them are based on rheological properties of emulsions. There are, however, very few based ...
Biodiesel synthesis at high pressure and temperature: Analysis of energy consumption on industrial scale
(Elsevier Sci Ltd, Oxford, 2009)
Analysis of several different schemes for industrial FAME production at higher pressure and temperature (catalytic or non-catalytic synthesis) was realized with the aim to find the best route to reduce the energy consumption ...
Fitness-for-purpose assessment of repaired feedwater heater / Ocena podobnosti za upotrebu zagrejača napojne vode posle popravke
(Society for Structural Integrity and Life, Institute for Material Testing, 2006)
The leakage of tube-tubesheet joint of feedwater heater on the inlet required redesign and repair by additional tube welding. The original design took into account only the sealing, and subsequently after some period leakage ...
Durability of sulfur concrete in various aggressive environments
(Elsevier Sci Ltd, Oxford, 2011)
Durability of sulfur concrete with different fillers, as well as Portland cement concrete, was tested in the solutions of HCl, H(2)SO(4), and NaCl. Regarding mass changes, in the solutions of HCl and H(2)SO(4) sulfur ...
Substituent and solvent effects on the UV/vis absorption spectra of 5-(3-and 4-substituted arylazo)-4,6-dimethyl-3-eyano-2-pyridones
(Elsevier Science Bv, Amsterdam, 2006)
Absorption spectra of seventeen 5-(3- and 4-substituted arylazo)-4,6-dimethyl-3-cyano-2-pyridones have been recorded in 12 protic and aprotic solvents in the range 200-600 nm. The effects of substituents on the absorption ...
Influence of Hydrolysis on the Osmotic Coefficients of the System {yZnCl(2) + (1-y)ZnSO4}(aq) at Temperature 298.15 K
(Amer Chemical Soc, Washington, 2009)
Isopiestic vapor pressure measurements were made for {yZnCl(2) + (1 - y)ZnSO4}(aq) solutions with ZnCl2 ionic strength fractions of y = (0.2640, 0.5042, 0.7533, and 1) at the temperature 298.15 K, using KCl(aq) as the ...