Mixtures of aldonic and aldaric acids are difficult to analyse. Aldonic acids can be separated in a satisfactory way on anion-exchange resins with a solution of sodium chloride as eluent. Under these circumstances, however, aldaric acids show unacceptably long elution times and peak broadening. The ability of aldaric acids to form non-adsorbable complexes with magnesium ions lowers their elutio...

The extruded AZ61A magnesium alloy plates of 6 mm thickness were butt welded using friction stir welding (FSW) process. The corrosion behavior of the welds was evaluated by conducting immersion test in NaCl solution at different pH value, immersion time and chloride ion concentrations. An empirical relationship was established incorporating pH value, immersion time and chloride ion concentratio...

The characterization of a new irreversible optical absorption-based one-shot sensor for magnesium is described. The magnesium photoactive probe is 7-diethylamino-3-(3,4-ethylendioxybenzoyl)coumarin immobilized in a plasticized polymeric membrane. The magnesium selectivity can be explained in terms of size and charge density of magnesium and charge-separated resonance forms contribution in the e...

The purpose of this study was to determine whether chronic periodontitis can stand behind modifications in the salivary and blood concentration of some bivalent cations (Calcium, Magnesium, Zinc and Copper). For this purpose, we formed a group of 30 adult patients with clinically onset chronic periodontitis, and another one of 30 healthy patients as control. Both groups were free from acute ora...

OBJECTIVE To review the function and use of intravenous magnesium in magnesium depleted and non-magnesium depleted patients. DATA SOURCES A review of studies reported from 1966 to 1998 and identified through a MEDLINE search of the English-language literature on the use of intravenous magnesium. SUMMARY OF REVIEW Magnesium is a metalo-coenzyme that participates in numerous enzymatic reactio...

I t is well known that type 1 diabetes is associated with magnesium deficiency (1), which may be followed by vascular complications (2–5). As a consequence, magnesium supplementation has been advocated to diabetic patients to minimize the risk of serious complications (6– 8). The magnitude of hypomagnesemia in diabetic subjects is, however, difficult to establish because most studies have repor...

Magnesium plays a key role in regulating insulin action, insulin-mediated glucose uptake, and vascular tone. Intracellular magnesium depletion may result in a defective tyrosine–kinase activity at the insulin receptor level, in a postreceptorial impairment in insulin action, and clinically in a worsening of insulin resistance. Intraand extracellular alterations of magnesium metabolism have been...

Major depression is a mood disorder characterized by a sense of inadequacy, despondency, decreased activity, pessimism, anhedonia and sadness where these symptoms severely disrupt and adversely affect the person's life, sometimes to such an extent that suicide is attempted or results. Antidepressant drugs are not always effective and some have been accused of causing an increased number of suic...

We investigated factors influencing alkaline phosphatase activity in the course of developing criteria for the establishment of a standardized method for its determination in human serum at 30 degrees C. The effects of pH, phosphorylatable acceptor (2-amino-2-methyl-1-propanol and diethanolamine), 4-nitrophenyl phosphate, magnesium ion, zinc ion, temperature, volume fraction of specimen, and de...

The folding and catalytic function of RNA molecules depend on their interactions with divalent metal ions, such as magnesium. As with every molecular process, the most basic knowledge required for understanding the close relationship of an RNA with its metal ions is the stoichiometry of the interaction. Unfortunately, inventories of the numbers of divalent ions associated with unfolded and fold...