The cellular level and activity of the general amino acid permease, the product of the GAP1 gene of Saccharomyces cerevisiae, are regulated at the level of transcription by two systems, the products of URE2/GLN3 and NIL1 in response to the nitrogen sources of the growth medium and inactivation in response to the presence of glutamine or glutamate. Active permease is phosphorylated. The addition...

The human body is in a constant state of turnover, that is, being synthesized, broken down and/or converted to different compounds. The dynamic nature of in vivo kinetics of human metabolism at rest and in stressed conditions such as exercise and pathophysiological conditions such as diabetes and cancer can be quantitatively assessed with stable, nonradioactive isotope tracers in conjunction wi...

By taking inspiration from the food industry, an assay was investigated as a potential screening tool to test efficiency of new phenolic antioxidants. The method based on spectrophotometric measurement stable free radical 1,1-diphenyl-2-picryl hydrazyl (DPPH) which, in its form, has absorbance maxima at 515 nm. disappearance this band, upon reaction with antioxidant, monitored reveal kinetic pa...

The kinetics of blood neutrophils was investigated by means of the in vitro radioactive diisopropyl fluorophosphate method in 35 patients with a chronic, steady-state neutropenia. There were 17 patients in whom the half disappearance time of neutrophils was normal. In 10 of these patients, the production of neutrophils was low and in 7, production was normal. In 18 patients the half disappearan...

the objective of this study was to determine the effects of hulled and hull-less barley grains’ chemical treatment on disappearance of dry matter (dm), starch and cncps carbohydrate fractions. for barley grain treatment, naoh, formaldehyde and urea were used at 35, 4 and 35 gr/kg dm respectively. three mature rams (one year old) of zel breed were rumen cannulated to calculate ruminal disappeara...

wax precipitate is one of the most serious issues the oil industry is currently facing, since it can cause some troubles such as increasing of the pressure losses in pipe which subsequently increases the required power for pumpage. to remove this problem, prediction of wax disappearance temperature (wdt) seems necessary. in this study, the pressure influence on the wax disappearance temperature...

We have studied the role of complement in lipopolysaccharide (LPS)-induced hypotension and disseminated intravascular coagulation (DIC) by comparing the effects of injection of three preparations of LPS from E. Coli 0111:B4, S. minnesota Re595, and S. marcescens. Injections of nonlethal doses of these LPS preparations into normal rabbits produced decreases in mean arterial blood pressure during...

Two tall fescue [Lolium arundinaceum (Schreb.) Darbysh] forages, one an experimental host plant/endophyte association containing a novel endophyte that produces low or nil concentrations of ergot alkaloids (HM4) and the other a typical association of Kentucky 31 tall fescue and the wild-type endophyte (Neotyphodium coenophialum; E+), were autumn-stockpiled following late-summer clipping and fer...