FTIR gas-phase kinetic study on the reactions of some acrylate esters with OH radicals and Cl atoms.

Acrylate esters are α,β-unsaturated esters that contain vinyl groups directly attached to the carbonyl carbon. These compounds are widely used in the production of plastics and resins. Atmospheric degradation processes of these compounds are currently not well understood.

Night-time atmospheric chemistry of methacrylates.

Background, Aim, And Scope: Methacrylates are α, β-unsaturated esters that are widely used in the polymer plastics and resins production. Kinetic information of NO(3) radical reactions is especially scarce and a good understanding of all the atmospheric oxidation processes of these compounds is necessary in order to determine lifetimes in the atmosphere and to evaluate the impact of these reactions on the formation of ozone and other photooxidants.

Materials And Methods: The experiments have been carried out using the relative technique in a static Teflon reactor at room temperature and atmospheric pressure (N(2) as bath gas) using gas chromatography (GC)-flame ionization detection (FID) as detection system.

Purification of 6-phosphogluconolactonase from bass (Dicentrarchus labrax L.)liver.

The enzyme 6-phosphogluconolactonase (EC 3.1.1.

Regulation of the pentose phosphate cycle in bass (Dicentrarchus labrax L.) liver.

The influence in the activities of the glucose-6-phosphate dehydrogenase and 6-phosphogluconate dehydrogenase produced by the ratio changes NADPH/NADP is studied. The intracellular ratios of 20 and 10 are enough to achieve total inhibition of these two enzymes, respectively. Measurements of a number of metabolic intermediates show that the concentrations of Krebs cycle compounds are higher than those of glycolytic pathway metabolites.

NADP-dependent isocitrate dehydrogenase from bass (Dicentrarchus labrax L.) liver.

The isocitrate dehydrogenase from bass liver was purified to homogeneity by gel filtration, affinity and ion exchange chromatographies. The molecular weight was estimated by gel filtration chromatography to about 120,000. Analysis of the enzyme on sodium dodecyl sulphate polyacrylamide gel electrophoresis showed it to be a dimeric protein.