نتایج جستجو برای: solvent selection

تعداد نتایج: 372269  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید بهشتی - دانشکده علوم 1372

a simple, sensitive and selective method for solvent extraction and spectrophotemetric determination of lanthanum (ii) europium (iii), and cerium (iii) is described , the rare earth metals are extracted into chloroform solution of n-phenylbenzohydroxamic acid (pbha) at ph 9-10 various parameters are studied to optimize the extraction conditions. the molar absorptivity is found to increase from ...

Journal: :Current protein & peptide science 2010
Tuo Zhang Hua Zhang Ke Chen Jishou Ruan Shiyi Shen Lukasz Kurgan

Identification and prediction of RNA-binding residues (RBRs) provides valuable insights into the mechanisms of protein-RNA interactions. We analyzed the contributions of a wide range of factors including amino acid sequence, evolutionary conservation, secondary structure and solvent accessibility, to the prediction/characterization of RBRs. Five feature sets were designed and feature selection ...

2015
Nicholas R. Sandoval Keerthi P. Venkataramanan Theodore S. Groth Eleftherios T. Papoutsakis

BACKGROUND Biodiesel production results in crude glycerol waste from the transesterification of fatty acids (10 % w/w). The solventogenic Clostridium pasteurianum, an anaerobic Firmicute, can produce butanol from glycerol as the sole carbon source. Coupling butanol fermentation with biodiesel production can improve the overall economic viability of biofuels. However, crude glycerol contains gro...

2005
Peter K. Kilpatrick

GAWRYS, KEITH LOUIS. How Asphaltenes Aggregate: Role of Chemistry and Solvent. (Under the direction of Peter K. Kilpatrick) Asphaltenes from three crude oils were separated on a preparatory-scale into 20 30 discrete subfractions by sequential precipitation from mixtures of n-heptane and toluene. The earliest fractions precipitated were characterized by lower than average aromaticity and atomic ...

Journal: :the iranian journal of pharmaceutical research 0
jadranka odović faculty of pharmacy, university of belgrade, belgrade, serbia. katarina karljiković-rajić faculty of pharmacy, university of belgrade, belgrade, serbia. jasna trbojević-stanković dr dragiša mišović clinical center, belgrade, serbia. biljana stojimirovic institute of urology and nephrology, clinical center of serbia and school of medicine, belgrade, serbia. sote vladimirov faculty of pharmacy, university of belgrade, belgrade, serbia.

in this assay, the evaluation of lipophilicity of four ace-inhibitors and hydrochlorothiazide (hctz) with rp-tlc on cellulose layers was described using three binary solvent systems. the selected ace inhibitors had sufficiently different structures which can indicate the method suitability for their lipophilicity evaluation as the model substances in comparison with hctz. in addition, the linea...

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