We have used a variational approach to calculate some thermodynamic properties of the quasi-one dimensional liquid 3He such as the energy, entropy, free energy, equation of state and heat capacity at finite temperature. We have employed the Lennard-Jones potential as the inter-atomic interaction. We have seen that the total energy increases by increasing both temperature and density....

Two single-stranded nucleic acid-binding proteins, UP1 and UP2, that were originally reported by Herrick and Alberts (Herrick, G., and Alberts, B. (1976) J. Biol. Chem. 251,2124-2132) have been purified to apparent homogeneity from calf thymus by high performance liquid chromatography. The amino acid sequence of UP1 (Williams, K. R., Stone, K. L., LoPresti, M. B., Merrill, B. M., and Planck, S....

The high-pressure liquid chromatographic separation of ail of the known metabolites of vitamin D2 and vitamin D3 found in biological fluids has been achieved. This technique has been successfully applied to the analysis of vitamin D mixtures, purification of vitamin D metabolites, and identification of radioactive peaks. Some theoretical bases for the observed resolutions are suggested. Supplem...

A h igh-per formance l i q u i d chromatography (HPLC) method has been deve loped f o r t h e s e p a r a t i o n of o l e f i n , s a t u r a t e , and a r o m a t i c hydrocarbons found i n h i g h b o i l i n g d i s t i l l a t e s and r e s i d u e s of s h a l e o i l and i n whole s h a l e o i l s . The dual-column chromatographic system uses s i l i c a g e l i n one column and s i l i...

a user-friendly and inexpensive ionic liquid-based single-drop microextraction (il-sdme) method was developed to preconcentrate trace amounts of aminophenol isomers (aps) from human urine, hair dye and water samples prior to analysis by high performance liquid chromatography-ultraviolet spectrophotometry detection (hplc-uv). under optimum conditions (i.e., 3.5 µl of 1-hexyl-3-methylimidazolium ...

Due to the complexity of proteomes, developing methods of sample fractionation, separation, concentration, and detection have become urgent to the identification of large numbers of proteins, as well as the acquisition of those proteins in low abundance. In this work, liquid isoelectric focusing (LIEF) combined with 2D-LC-MS/MS was applied to the proteome of Saccharomyces cerevisiae. This yield...

The present contribution discusses recent advances in ultra-high-pressure liquid chromatography (UHPLC) and multi-dimensional (MDLC) technology. First, new developments UHPLC column technology system design are highlighted. latter includes a description of novel injector concept enabling method speed-up, emerging detectors, instrument diagnostics approaches. Next, online MDLC workflows reviewed...