PubMed · 8432492
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N Hymowitz, M Feuerman, M Hollander, R J Frances. 1993. Smoking deterrence using silver acetate.. https://doi.org/10.1176/ps.44.2.113
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The use of dry mycelium of Rhizopus oryzae as biocatalyst for ester production in organic solvent has been studied. Mycelia with notable carboxylesterase activity were produced when different Tweens (20, 40, 60 and 80) were employed as main carbon source for the growth. Dry mycelium of four strains of Rhizopus oryzae proved effective for efficiently catalysing the synthesis of different flavour esters (hexylacetate and butyrate, geranylacetate and butyrate) starting from the corresponding alcohol and free acid, including acetic acid. The esterification of the racemic mixture of 2-octanol and butyric acid proceeded with high enantioselectivity (R-ester produced with enantiomeric excess > or =97%) when Rhizopus oryzae CBS 112.07 and Rhizopus oryzae CBS 260.28 were employed.
The simulation of a microbial transformation course is an important tool for the optimal design or characterization of industrial processes. Usually, models are developed to describe a specific part of the culture such as microbial growth and most of the time ignore the influence of physical and chemical environment on growth dynamics of the microorganism. In this work we propose a method which combines the description of the evolution of components involved in the bioprocess including biomass and the physical environment generated mainly by the bioreactor characteristics and operational conditions. Stoichiometric, kinetic, fluid dynamics and mass transfer models are linked to predict the course of the Escherichia coli culture under the influence of different experimental conditions and types of bioreactors. A set of 22 kinetic and physical parameters obtained from independent experiments and from literature are used in order to predict glucose, biomass, acetate, dissolved oxygen and CO(2) concentrations in airlift and stirred tank bioreactors.
We synthesized an analogue of the thyromimetic GC-1 bearing the same hydrophobic appendage as the estrogen receptor antagonist ICI-164,384. While having reduced affinity for the thyroid hormone receptors compared to GC-1, it behaves in a manner consistent with a competitive antagonist in a transactivation assay.