Article Abstract:
The differences in the activities of enzymes involved in poly-beta-hydroxybutyrate (PHB) metabolism are responsible for the greater accumulation of PHB in soybean as compared to chickpea bacteroids. However, in free-living cultures the chickpea bacteroids expresses all the enzymes necessary for PHB synthesis, and accumulate large amounts of PHB. The greater potential for the oxidation of malate to oxaloacetate in the chickpea bacteroid leads to the greater utilization of acetyl-coenzyme A in the tricarboxylic acid as compared to PHB synthesis.
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Article Abstract:
A study was conducted on isoprene consumption by soil microorganisms in a temperate forest soil using both in situ and in vitro techniques. Experiments revealed that isoprene loss stems from biological processes which confirm that consumption ceases by autoclaving the soil and that consumption rates increase with constant exposure to isoprene. Furthermore, microorganisms consume isoprene even at trace-level concentrations and that soil microorganisms provide a biological sink for atmospheric isoprene.
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Article Abstract:
Intact cells of Pseudomonas fluorescens 127-68 XVII, which contains the naphthalene dioxygenase system, were used to study the oxidation of benzocyclobutene (BCB). Gas chromatographic analysis of oxidation products showed the consistent presence of two metabolites with similar polarities and boiling points. Further characterization of these products identified them as BCB-1-ol, which represents the initial oxidation product of BCB, and BCB-1-one, the product of dehydrogenation of BCB-1-ol.
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