In order to investigate the role of glutathione in response to salt stress in the thermophilic fungus,
, the biomass and the intracellular pool of protein and the glutathione + glutathione disulphid (GSH + GSSG) was measured for four days in a medium with NaCl or KCl added and in the basal medium. Due to the osmotic and ionic stress imposed by the salts, the growth of
was delayed and the inhibitory effect of KCl exceeded that of NaCl. Glutathione seemed to be involved in the response of
towards high concentrations of salt, as the level of stress was negatively correlated with the amount of total glutathione. Salt stress did not result in an increased intracellular protein production. GSH accumulated while nutrients were abundant and were subsequently degraded later, suggesting that nutrients stored in GSH are used when the medium is depleted.
Authors:H. Aage, B. Andersen, A. Blom, and I. Jensen
The solubility of magnesium-ammonium-phosphate (struvite) has been studied employing radioisotope32P as tracer. The amount of sample in solution is determined by measuring the Cherenkov radiation due to the fast -particles emitted from this radionuclide. The themodynamic solubility product is determined at various temperatures and compared with former results.
Authors:Ketan Pimparkar, Bernard Yen, John R. Goodell, Veronique I. Martin, Wen-Hsuan Lee, John A. Porco Jr., Aaron B. Beeler, and Klavs F. Jensen
In an effort to utilize microfluidics to enable photochemistry, we have devised a method for fabrication of devices with UV-transmissive glass. The photochemical device is successfully incorporated into a system utilizing high-pressure capillary mercury lamps and cooling system. We have demonstrated the ability to carry out photochemical transformations with substantial rate acceleration. Furthermore, we highlight the ability to carry out analytical-scale reactions on a pulse flow automated system while modulating wavelength and residence time to identify optimal photochemical reaction conditions. The analytical conditions were also successfully converted to continuous-flow preparative scale.