the quantitative structure–property relationship (qspr) method is used to develop the correlation between structures of crude oil hydrocarbons (80 compounds) and their boiling point and water solubility. sub-structural molecular fragments (smf) calculated from structure alone were used to represent molecular structures. a subset of the calculated fragments selected using stepwise regression (fo...

turbulence structure on the gas side of a wavy stratified flow was experimentally investigated in a near horizontal 18.7 cm (h) 10 cm (w) 5.5m (l) rectangular duct.by applying the variable interval time averaging (vita) technique to the hot wire anemometer measurements frequency of occurrence of turbulent events were detected near the air-water interface. experimental results showed that freque...

The multi-subunit eukaryotic translation elongation factor 1 (eEF1) consists of two functionally distinct parts: G-protein eEF1A and guanine nucleotide exchange factor eEF1B. Here, we report on the cloning of cDNAs of both the α and γ subunits of the eEF1B from the ciliated protozoan Tetrahymena pyriformis. The open reading frame of the eEF1Bγ cDNA encodes a 399-amino acid long polypeptide with...

in the present work, the quantum theoretical calculations of the molecular structure of the 1-(1, 3-benzothiazol-2-yl)-3-(thiophene-5-carbonyl) thiourea has been predicted and are evaluated using density functional theory (dft) in gas phase. the geometry of the title compound was optimized by b3lyp/6-311+g and b3lyp/6-311+g* methods and the experimental geometrical parameters of the title compo...

This work describes the uncertainty calculation for determination of chromium oxide in leather. Following various steps which includes assembling a list sources uncertainty, with help basic formula used to calculate measure and as all parameters cause an influence on result because value associated it then effect diagram is made shows correlation between these indicates their result.All individ...

a thermodynamic analysis of the counter flow wet cooling tower (cwct) in the steelmaking unit of the khuzestan steel company (ksc) is performed in this paper. we evaluated both energy and exergy formulations for analyzing the heat and mass transfer, exergy and second-law efficiency in this cooling tower. the lewis factor le f is an indication of the relative rates of heat and mass transfer in a...

The nucleotide sequence of a 3120 bp region of the E. coli chromosome that includes the entire ptr gene has been determined. The proposed coding region for Protease III is 2889 nucleotides long, which would encode a protein consisting of 962 amino acids with a calculated molecular mass of 107,719 daltons. The predicted primary structure of the protein includes a 23-residue signal sequence, clea...

the possibility of chemical modification of peptides and proteins under the condition of proteolytic digestions and fabms analysis was investigated. the results ;indicate that among the amino acid constituents of peptides and proteins: serinefcysteine, and cystine are the most sensitive residues which undergo chemical modificadons under the exprimenta1 conditions. the chemical modification of t...

Hydrodynamic performance of gas microbearings, fabricated with deep X-ray lithography and electroplating, will be presented in this article. Static performance in terms of load parameters and attitude angles was calculated using Molecular Gas Lubrication (MGL) theory. Threshold speed and allowable rotor mass were calculated to investigate safe operating conditions of the fabricated gas microbea...