Biosorption of copper by yeasts.

The ability to accumulate copper from aqueous solutions was determined with different yeast species. Yeast cells did not show any significant differences in process kinetics. The uptake was very fast and was influenced by environmental factors.

Microbial transformation of hexachlorocyclohexane.

Some microorganisms are able to accumulate and to metabolize the pesticide lindane (gamma-hexachlorocyclohexane, gamma-HCH) and other HCH-isomers. Microbial activities, detected metabolites, transformation rates, concentrating factors are reviewed. The results are discussed in respect to use microbiological processes for purification of contaminated water and soil and for recycling of waste HCH-isomers.

Kinetic studies of phenol degradation by Rhodococcus sp. P1. II. Continuous cultivation.

The degradation of phenol by Rhodococcus sp. P1 was studied in continuous culture systems. The organism could be adapted by slowly increasing concentration, step by step, up to 30.

Kinetic studies of phenol degradation by Rhodococcus sp. P1. I. Batch cultivation.

Rhodococcus sp. P1 utilizes phenol as the sole carbon and energy source via the beta-ketoadipate pathway. In batch cultivation, concentrations up to 2.

Degradation of 3-aminophenol by Arthrobacter spec. mA3.

The bacterial strain mA3 capable of utilizing 3-aminophenol as the sole source of carbon, energy and nitrogen for growth was isolated from an enrichment culture and identified as an Arthrobacter species. Utilization of 0.68 mg/ml 3-aminophenol by batch cultures of this organism was characterized by a specific growth rate (mu) of 0.

Phenol hydroxylase from Rhodococcus sp. P 1.

The enzyme phenol hydroxylase (EC 1.14.13.

Degradation of phenolic compounds by the yeast Candida tropicalis HP 15. II. Some properties of the first two enzymes of the degradation pathway.

The first two enzymes of the phenol degradation pathway were determined and characterized in crude extracts from Candida tropicalis HP 15. The phenol hydroxylase (EC 1.14.

Degradation of phenolic compounds by the yeast Candida tropicalis HP 15. I. Physiology of growth and substrate utilization.

The yeast Candida tropicalis HP 15 was able to utilize phenol up to concentrations of 2.5 g/l as a sole carbon and energy source. Phenol was metabolized via the beta-ketoadipate pathway by an inducible enzyme system.

[Microbial side chain splitting of phenylurea and carbonic acid anilides].

A Gram- negative rod-shaped bacterium 28/1 isolated by enrichment cultures is able to hydrolyze the amide bond of some phenylurea herbicides and acid anilide herbicides by an inducible amidase. 7.5% of 0.

[On the physiology of growth and riboflavin overproduction of Eremothecium ashbyii. III. Investigations on the incorporation of radioactive labeled substrates in cell material and riboflavin (author's transl)].

The incorporation of glycine-2-14C and adenine-U-14C in cell material and riboflavin was investigated in order to determine the proportions metabolites were channeled in growth processes and product synthesis of Eremothecium ashbyii. Extraction- and measurement methods were developed to compare the incorporation of radioactive metabolites into different cell fractions. Young cells incorporate the labeled compounds in a high rate into the cell material.