Previous reports from this laboratory (R. K. Rasmussen and H. P. Klein, Biochem. Biophys. Res. Commun. 28:415, 1967) indicated that many organic compounds can stimulate the acetylcoenzymeA (CoA) carboxylase of Saccharomyces cerevisiae strain LK2G12. The enzyme from this organism appears to differ from that reported by Matsuhashi et al. (Biochem. Z. 340:243, 1964; Biochem. Z. 340:263, 1964), who...

Incubation of GDP-[(14)C]mannose with liver microsomes and magnesium ions led to the formation of dolichol monophosphate mannose and of other acidlabile compounds that contain oligosaccharides. Formation of these compounds was enhanced by addition of an acceptor lipid in the same fractions of DEAE-cellulose chromatography where bound dolichol is found. Alkaline treatment of the oligosaccharides...

Studying seemingly simple metathesis reactions between ZnCl(2) and (t)BuMgCl has, surprisingly, revealed a much more complex chemistry involving mixed magnesium-zinc compounds that could be regarded as Mg-Zn hybrids. Thus, the reaction of equimolar amounts of ZnCl(2) and (t)BuMgCl reveals the formation of the unprecedented mixed Mg-Zn complex [(THF)(4)Mg(mu-Cl)(2)Zn((t)Bu)(Cl)] (1), as a result...

Stable structures and stoichiometries of binary Mg−N compounds are explored at pressures from ambient up to 300 GPa using ab initio evolutionary simulations. In addition to Mg3N2, we identified five nitrogen-rich compositions (MgN4, MgN3, MgN2, Mg2N3, and Mg5N7) and three magnesium-rich ones (Mg5N3, Mg4N3 and Mg5N4), which have stability fields on the phase diagram. These compounds have peculia...

In the second part of review, aspects changes in magnesium metabolism under conditions severe stress, mechanisms anti-stress protection body with participation magnesium, features water-electrolyte at cellular level, anti-inflammatory effect and role processes detoxification acute poisoning certain poisons are consi-dered. The main body’s defence to suppress oxidative stress by limiting product...

In this study, the effect of temperature on the diffusion welding of AZ31 magnesium alloy and 7075 aluminum was discussed. Diffusion welding temperature was the most important parameter since all mechanisms are sensitive to temperature in Diffusion welding method. Intrusive contacts between the two alloys at temperatures of 430, and 440 °C 450 and took 60 min. In all tests constant pressure and...

In multi-species grassland communities, plant growth and development are modified by both a number of habitat-related factors and physico-chemical processes resulting from the neighbourhood of other species. Plant interactions mediated through chemical substances are identified within the allelopathic processes. The allelopathic process involves excretion of bioactive compounds from plant or mi...

Boron-based materials have been widely studied for hydrogen storage applications. Examples of these compounds are borohydrides and boranes. However, all present some disadvantages that hindered their potential application as in the solid-state. Thus, different strategies developed to improve dehydrogenation properties materials. The purpose this review is provide an overview recent advances (fo...