A gram-negative nonmotile rod which was capable of using 1,2-(14)C-ethylene glycol as a sole carbon source for growth was isolated from a brine pond, Great Salt Lake, Utah. The bacterium (ATCC 27042) required at least 0.85% NaCl for growth and, although the chloride ion was replaceable by sulfate ion, the sodium ion was not replaceable by potassium ion. The maximal concentration of salt tolerat...

We study the effect of functional groups (CH3*4, OCH3, CH3, Cl, CN, F*4) on the electronic transport properties of 1,4-benzenediamine molecular junctions using the non-equilibrium Green function method. Exchange and correlation effects are included at various levels of theory, namely density functional theory (DFT), energy level-corrected DFT (DFT+Σ), Hartree-Fock and the many-body GW approxima...

Tetradentate complexes of Zn (II) Schiff bases derived from DHA, o-phenylenediamine, 4- N, Diethyl amino Salicylaldehyde (L1) and Dehydroacetic Acid (DHA), 4-methyl-o-phenylenediamine, 5-bromo (L2) have been synthesized characterized by elemental analysis, magnetic susceptibility, thermal X-ray diffraction, 1HNMR, Mass, IR,UV visible spectra conductometry. The ligand field parameters found to o...

A water soluble, Bronsted acid, 5-sulfosalicylic acid as an efficient organocatalyst was used for the synthesis of physiologically active 2-substituted benzimidazole derivatives from o-phenylenediamine and aromatic aldehydes in ethanol at reflux condition. Cost-effectiveness, use of non-hazardous solvents, metal free and commercially available catalyst, single-step, environmentally fri...

A retinoic acid epoxidase is present in rat kidney homogenates. It is found in the particulate fraction, and is dependent on ATP, NADPH, and oxygen. It is stimulated by Fe2+ and inhibited by Mn2+, Zn2+, Cu2+, EDTA, and N,N'-diphenyl-para-phenylenediamine. Its properties are closest to those of microsomal lipid peroxidases previously studied. Epoxidase activity is not affected by the rat's vitam...

Original Article Gel staining Gel electrophoresis Native-PAGE Proteins Peroxidase activity Haptoglobin phenotyping N,N,N′,N′-tetramethyl-p-phenylenediamine,

The aerobic respiratory chain of Escherichia coli is branched. In aerobically grown cells harvested in midexponential phase, a respiratory chain containing only b-type cytochromes is predominant. This chain contains a terminal oxidase which is a b-type cytochrome, referred to as cytochrome o. However, when the bacteria are grown under conditions of oxygen limitation, additional components of th...

Many strong and extreme sensitizing chemicals, such as para-phenylenediamine (PPD), toluene-2,5-diamine (TDA) and other aromatic amines or cross-reacting substances, are ingredients in hair dye products. The chemistry of hair dyeing and the immunological reactions to the potent sensitizing hair dye components are complex and have not been fully clarified up until now. Recently 2-methoxymethyl-p...

A bioassay for the possible carcinogenicity of technical-grade 4-chloro-o-phenylenediamine was conducted using Fischer 344 rats and B6C3F1 mice. 4-Chloro-o-phenylenediamine was administered in the feed, at either of two concentrations, to groups of 49 or 50 male and 50 female animals of each species. For male and female rats, the high and low time-weighted average dietary concentrations of 4-ch...