The secondary structures of two proteins were examined by circular dichroism spectroscopy after adsorption onto a series of organically modified silica glasses. The glasses were prepared by the sol-gel technique and were varied in hydrophobicity by incorporation of 5% methyl, propyl, trifluoropropyl, or n-hexyl silane. Both cytochrome c and apomyoglobin were found to lose secondary structure af...

Surfactin originated from genus Bacillus is composed of a heptapeptide moiety bonded to the carboxyl and hydroxyl groups of a β-hydroxy fatty acid and it can be chemically modified to prepare the derivatives with different structures, owing to the existence of two free carboxyl groups in its peptide loop. This article presents the chemical modification of surfactin esterified with three differe...

Background: According to highlighted role of men in family planning, the use of reversible methods of contraception with no adverse effects on androgen-dependent metabolic reactions is very important. Therefore, in order to achieve a conductor combination in the designing contraceptive drugs, in the study, the effect of two drugs: Propylene glycol and Cyclo Hexyl on histological parameters of s...

A new ZORBAX stationary phase, Agilent ZORBAX Eclipse Plus Phenyl-Hexyl, separated five estrogen type steroids better than a C18 and better than three other phenyl columns under identical conditions, due to its unique selectivity for analytes containing phenyl groups. The comparisons support selectivity as the most important factor to optimize resolution, to separate peaks completely. Selectivi...

The dicyclo-hexyl-amine salt of RG108 (N-phthalyl-l-tryptophan) co-crystallizes with a water mol-ecule and a disordered mol-ecule of dimethyl-formamide (DMF), viz. dicyclo-hexyl-aminium (S)-2-(1,3-dioxoisoindolin-2-yl)-3-(1H-indol-3-yl)propanoate dimethyl-formamide solvate monohydrate, C(12)H(24)N(+)·C(19)H(13)N(2)O(4) (-)·C(3)H(7)NO·H(2)O. The conformation of the deprotonated compound is const...

The inhibition of mild steel corrosion in 1 M HCl solution by some ionic liquids (ILs) namely, 1-hexyl-3-methylimidazolium trifluoromethanesulfonate [HMIM][TfO], 1-hexyl-3-methylimidazolium tetrafluoroborate [HMIM][BF4], 1-hexyl-3-methylimidazolium hexafluorophosphate [HMIM][PF6], and 1-hexyl-3-methylimidazolium iodide [HMIM][I] was investigated using electrochemical measurements, spectroscopic...

In the title complex, [Pt(C(6)H(11))Cl(C(8)H(12))], the Pt(II) ion lies in a distorted square-planar environment defined by the Cl and cyclo-hexyl C atoms and the mid-points of the two π-coordinated double bonds of cyclo-octa-1,5-diene. As a result of the different trans influences of the Cl atom and the cyclo-hexyl group, the Pt-C bonds trans to the cyclo-hexyl group are longer than those tran...

in this research, effect of using hornbeam and beech branch woods in admixture with birch stem wood on their cmp pulp properties. using percentage of branch woods, with 20% constant content for birch stem wood, were 0, 16, 40, 56 and 80 in final mixture of hardwoods. the results indicated that cooking time, to reach 85% yield and under same cooking condition, and also refining quantity, to reac...

In the title compound, [Pd(NO(3))(2)(C(10)H(17)NO)(2)], the Pd(II) centre is located on an inversion center and is coordinated in a square-planar geometry by two O atoms of the monodentate nitrate groups and two carbonyl O atoms of the 1-cyclo-hexyl-pyrrolidin-2-one ligands.