Using batch cultures, we determined transformation rate coefficients for microbial transformation of 2,4-dichlorophenoxyacetic acid butoxyethyl ester (2,4-DBE) in periphyton-dominated ecosystems. Rates of 2,4-DBE loss were measured over short periods of time (usually less than 10 h), and first-order transformation rate coefficients (k(1)) were determined under the specific conditions of low 2,4...

M icbial Trsform aion of O rgnotin C om punds uder im uated Ldfill C onitions Liöping 2007 The cycling of tin is a topic of concern because of its anthropogenic entry of organotin compounds into the environment. Special attention is given to the transformation of organotins and the methylation of inorganic tin, since these processes often give rise to more toxic formulations. By far the largest...

The conversion of zearalenone by various microorganisms was studied. A new polar metabolite was formed in addition to alpha- and beta-zearalenols. The structure of the new metabolite was determined as zearalenone-4-O-sulfate conjugate on the basis of enzymatic and acid hydrolysis, followed by mass spectrometry, nuclear magnetic resonance, and infrared spectroscopic analysis. The results obtaine...

Ž . Although dissimilatory iron reducing bacteria DIRB are capable of reducing a number of metals in oxides and soluble forms, the factors controlling the raterextent of magnetite reduction and the nature of the mineral products resulting from magnetite reduction are not well understood. This study was carried out to investigate mechanisms and biogeochemical processes occurring during magnetite...

Soil enrichment technique was followed to isolate the fungi capable of performing biotransformation of albendazole. Among the 5 fungi isolated, Aspergillus fumigatus, A. niger and Penicillium chrysogenum could transform albendazole to one metabolite and Fusarium moniliforme could transform albendazole to two metabolites. The transformation was confirmed by HPLC. Based on LC-MS-MS analysis, the ...

Steroids are widespread in nature and are important compounds present in living systems. These compounds include different sterols, bile salts and steroid hormones like estrogen, androgens, testosterones etc. and have numerous therapeutic applications. Microbial biotransformation of steroids is one of the applications of microorganisms in the large-scale industries and it also have certain adva...

Poly-γ-glutamate (PGA), a novel polyamide material with industrial applications, possesses a nylon-like backbone, is structurally similar to polyacrylic acid, is biodegradable and is safe for human consumption. PGA is frequently found in the mucilage of natto, a Japanese traditional fermented food. To date, three different types of PGA, namely a homo polymer of D-glutamate (D-PGA), a homo polym...