New denitrifying bacteria that could degrade pyridine under both aerobic and anaerobic conditions were isolated from industrial wastewater. The successful enrichment and isolation of these strains required selenite as a trace element. These isolates appeared to be closely related to Azoarcus species according to the results of 16S rRNA sequence analysis. An isolated strain, pF6, metabolized pyr...

The adsorption of pyridine onto silver colloids has been investigated by Raman spectroscopy experiments and by ab initio DFT and MP2 calculations. The solvation dynamics of the pyridine in water has been studied by a molecular dynamics simulation. The results are compared with the latest available experimental and theoretical data. It is found that the pyridine is essentially hydrogen bonded to...

the mucopolysaccharidoses are a clinically and genetically heterogenous group of lysosomal storage diseases caused by defects in different enzymes for mucopolysaccharid degradation (glycosaminoglycans). except for mucopolysaccharide storage disease type ii (hunter disease), all are transmitted through an autosomal recessive mode of inheritanceinheritance. clinical feature of these metabolic dis...

Dacarbazine is an antitumor prodrug which is used for the treatment of malignant metastatic melanoma and Hodgkin’s disease. It requires initial activation in liver through an N-demethylationreaction. The active metabolite prevents the progress of disease via alkylation of guanine bases in DNA strands. In order to investigate the importance of imidazole ring and its dynamictautomerization in ant...

A series of Schiff Bases of Ni(II) and Cu(II) using acetylacetone (acac), salicylaldehyde (sal), ethylenediamine (en), and o-phenylendiarnine (dabe) were prepared and characterized. The electronic spectra of some copper chelates in various organic solvents depend strongly on the solvent used and the d-d band of Cu(II) shifts to red with the increase of the Donor Number (DN) of solvent. The ...

The cathodic polarographic wave observed for solutions of AlCl, in pyridine is due not to reduction of Al(III), but to reduction of the solvent, in which process Al(II1) plays an essential role, apparently by polarizing the pyridine through the formation of a Lewis acid-base adduct with the pyridine nitrogen. Macroscale electrolysis of pyridine solutions of AlCl, at a mercury cathode results in...

The title co-crystal, C(9)H(9)NO(2)·C(6)H(6)O(2), is composed of one 2,6-diacetyl-pyridine mol-ecule and one resorcinol mol-ecule as the asymmetric unit. In the 2,6-diacetyl-pyridine mol-ecule, the two carbonyl groups are anti-periplanar to the pyridine N atom. In the crystal, the 2,6-diacetyl-pyridine and resorcinol mol-ecules are connected by two O-H⋯O hydrogen bonds, forming planar chains of...

Polymer-supported oxidic osmium catalysts based on cross-linked poly(4-vinyl pyridine) were synthesized by various routes and characterized by a number of physical techniques (Raman, IR, XPS, “C and 15N solid-state NMR spectroscopy). Model compounds of type Os,O,L, (L = pyridine, 4-iso-propyl pyridine, and 4-tert-butyl pyridine) were obtained under the conditions of the catalyst synthesis. The ...

The degradation of pyridine, widely used in the synthesis of vitamins, drugs, rubber chemicals, herbicides and pesticides, can be photocatalyzed by semiconductor catalysts. Since zinc oxide promotes faster pyridine photocatalytic oxidation reactions than TiO2, the former appears to be a suitable alternative to TiO2 for water treatment contaminated with pyridine. The photodegradation efficiency ...