Epidemiological studies indicate that dietary magnesium influences atherogenesis. Magnesium inhibits plaque formation in animals receiving a high cholesterol diet, whereas the effect of magnesium in animals on low-fat diet has not been explored. Magnesium sulfate was given in the drinking water (50 mg/mL) to 7-week-old apolipoprotein E-deficient (apoE(-)(/)(-)) mice (n=30). Control animals (n=3...

Magnesium ion is a significant constituent of cell cytoplasm and participates in many intracellular enzymatic reactions. Although total cell magnesium can be rather easily determined by atomic absorption spectroscopy, the free magnesium is more difficult to measure and is much less than the total because of magnesium binding to cellular organelles or ionic constituents. Moreover, since magnesiu...

The effect of impregnation sequence on the formation of Pt/Ni bimetallic nanoparticles supported on g-Al2O3 was investigated for catalysts with Pt/Ni atomic ratios of 3/1 and 1/1. These bimetallic catalysts were prepared with a fixed Pt loading (5 wt.%) by incipient impregnation of one metal precursor and calcination, followed by the impregnation of the second metal precursor and a second calci...

ultrastructural changes in immature articular carilage were studied after treatment of 5-weeks-old rats with ofloxacin, a fluoroquinolone, and in magnesium deficiency.we concluded that quinolone-induced arthropathy is probably due to chelation of functionally available magnesium in joint cartilage as magnesium deficiency in joint cartilage could impair chondrocyte-matrix- interaction which is m...

The kinetics of the CO + NO and CO + O2 reactions have been studied over several different Pd/Al2O3 powder catalysts covering a wide range of average Pd particle sizes. The structure-insensitive nature of the CO + O2 reaction over Pd has been exploited to determine the relative dispersions in several Pd/Al2O3 powder catalysts by measuring the rate of that reaction and normalizing against surfac...

Ni-based catalysts as replacement for noble metal catalysts are of particular interest in the catalytic conversion of biomass due to their cheap and satisfactory catalytic activity. The Ni/SiO2 catalyst has been studied for the hydrogenolysis of glycerol, and doping with phosphorus (P) found to improve the catalytic performance significantly because of the formation of Ni2P alloys. However, in ...

This report presents a method for the quantitative determination of magnesium and calcium in a single specimen of urine, stool, and food by formation and calorimetric determination of their respective phosphates. The method makes use of some of the principles advanced by Roe and Kahn (1) for determination of serum calcium, and by Denis (2) for serum magnesium. Phosphorus determinations are perf...

Amongst the many ways of constructing the amide bond, there has been a growing interest in the use of metal-catalysed methods for preparing this important functional group. In this tutorial review, highlights of the recent literature have been presented covering the key areas where metal catalysts have been used in amide bond formation. Acids and esters have been used in coupling reactions with...

Two late transition metal catalysts based on 2,6-bis(imino)pyridine iron(II) were synthesized by introducing methyl substitution (catalyst A) and t-Butyl substitution (catalyst B) at the ortho position of the aryl rings of the ligand. Comparative ethylene polymerizations using the catalysts showed quiet different behaviors. The activity of catalyst A was higher than that of catalyst B in all of...