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9.103  Articles
1 of 911 pages  |  10  records  |  more records»
Plasma sprayed coatings composed of stoichiometric hydroxyapatite have been extensively used to improve integration of metallic implants in the host bone, as hydroxyapatite (HA) is normally regarded as similar to the mineralized phase of bone. However, th... see more

A theoretical study was conducted to determine the ionization constants of N-substituted amino acid derivatives using HF, DFT, and MP2 calculation methods. The extent of compatibility of these methods was determined by discussing the theoretical variables... see more

The samples of vanadium substituted bismuth tungstates with a cubic structure were obtained by solid state method. The unit cell volume of the compounds slightly contracts with increasing tungsten content and in case of vanadium doping. Thermal expansion ... see more

The constants of ionization pKBH + of substituted 6,9-dichloracridines have been determined in the mixed ethanol – water solvent (50 mole percent of ethanol) at the temperature of 25°C by the method of potentiometric titration. It has been shown that thes... see more

By the interaction of the substituted aryl isocyanates with the series of 3-arylmethyl-1,3,7-triazaspiro[ 4.4]nonane-2,4-diones in the propanol-2 medium the series of the substituted aryl amides of 3-arylmethyl-2,4-dioxo-1,3,7-triazaspiro[4.4]nonane-7-car... see more

Aim. To study the acid-base properties of derivatives of 2-(benzoylamino)(1-R-2-oxoindolin-3-ylidene)acetic acid substituted by the location 1 of oxoindolin fragment.Results and discussion. The compounds studied are weak acids, their strength decreases wi... see more

A spectrophotometric method was developed for the determination of ascorbic acid in mixtures with cysteine using the reduction of 18-molybdodiphosphate heteropoly complex. In order to decrease the influence of the 18-molybdodiphosphate reduction with cyst... see more

Substitution of Ti+4 and Zn+2 ions on magnetic material BaFe12-xTix/2Znx/2O19 (x = 0 and 2) using the wet milling method has been performed. This research was conducted to get information the influence of Ti-Zn substitution on magnetic properties and its ... see more

A series of Al substituted Ni spinel ferrites with the empirical formula , where x = 0.0, 0.1, 0.2, 0.3, 0.4 and 0.5, were prepared by conventional ceramic double sintering method. DC electric properties and initial permeability ( ) were carried out for t... see more

1 of 911 pages  |  10  records  |  more records»