The investigation of the structure of the lecithins and cephalins (phosphatidylethanolamines) from natural sources gave rise to the question, whether the phosphoric acid in these substances is attached to the (Yor P-carbon atom of the glycerol moiety. Since the acid and alkaline hydrolysis of natural lecithins yielded mixtures of CYand p-glycerophosphoric acid (GPA), it was assumed that they ex...

AIM To evaluate the cytotoxicity of 15% citric acid, 5% phosphoric acid and 2.5% NaOCl on cultured fibroblasts using MTT colorimetric assay. METHODOLOGY Irrigating solutions of 5% phosphoric acid, 15% citric acid, and 2.5% NaOCl, diluted at 0.1% and 0.5%, were applied to cell cultures of 3T3L1 fibroblasts. The cell viability was determined by means of MTT colorimetric assay after a period of ...

Extensive hydrogen-bonds between the hydroxyl-rich BiOCl surface and phosphoric acid significantly facilitate oxygen vacancy formation, O2 activation, deep toluene oxidation.

introdouction: esthetic demands of patients have led to the introduction of tooth-colored restorations wherecomposite resins are bonded to the enamel using acid etch techniques. total etch adhesion systems are still considered as the gold standard among bonding systems. however, clinicians have a tendency to use adhesive systems with simpler application procedures. the aim of the present study ...

While investigating the enzymatic conversion of n-glyceric acid-3phosphoric acid to pyruvic acid and phosphoric acid, an essential step both in glycolysis and fermentation, Meyerhof and Lohmann (1) observed the formation of a hitherto unknown organic phosphoric acid ester. They succeeded in isolating the new intermediary compound by virtue of the ease of crystallization of the silver-barium sal...

Maintaining phosphoric slurry within the optimal temperature range is of great significance in improving the quality of the phosphoric acid product. Due to the lack of integral parts and the limited number of expert rules, general fuzzy controllers are commonly incapable of achieving accurate output. This paper proposed a novel fuzzy controller based on variable universes of discourse (VUD) to ...

Multibubblesonoluminescence (MBSL) emission spectra at different forcing frequencies ( 20, 580, 850 KHz and 1.1 MHz) in Sulphuric acid and Phosphoric acid, under different noble gases atmosphere ( Ar, Xe and He) have been investigated. Using lower frequency we observed the presence of new emissions lines which may indicate the formation of ionized species with very high energy level inside the ...

In this study, extraction of amoxicillin (AMOX) ions from aqueous solution by liquid-liquid extraction (LLE) was investigated. The LLE process by response surface methodology (RSM) was carried out based on central composite design (CCD). The organic phase consisted of extractant and toluene as diluent. In this process, triethylamine (TEA), di-2-ethylhexyl phosphoric acid and mono-2-ethylhexyl p...

In this study, different methods, including acid hydrolysis (phosphoric and formic acid), thermohydrolysis, microwave methods were tested for recycling of fiberboards made 100 % beech 70 + 30 pine wood fibers, which are widely sold in the market. The impacts using on fibers investigated with help a device that determines fiber dimensions according to optical principles. laboratory setting, test...