A method for controlling the gastric pH of rabbits to low acidity (pH > 4) by using different antacids was investigated, and the physiological state of rabbits during gastric-acidity control and repeated bioavailability tests was also examined in terms of hemocytological and clinicobiochemical parameters. Neither dried aluminum hydroxide gel (DAH) nor synthetic aluminum silicate (SAS) could ele...

We introduce a nonbonded three-body harmonic potential energy term for Mg-O-H interactions for improved edge surface stability in molecular simulations. The new potential term is compatible with the Clayff force field and is applied here to brucite, a layered magnesium hydroxide mineral. Comparisons of normal mode frequencies from classical and density functional theory calculations are used to...

PURPOSE Critically evaluate the experimental evidence and clinical trial outcomes as the basis for use of magnesium (Mg) supplements as therapy for calcium oxalate nephrolithiasis. MATERIALS AND METHODS Literature search of MedLine and Web of Science through January 2005; articles cited in papers found by searches. RESULTS Magnesium inhibits calcium oxalate crystallization in human urine an...

Suspension of magnesium and aluminum hydroxide (30--60 mEq/24h) or a comparable volme of water was orally administered by gastric intubation to two groups of 20 male Wistar rats each over 60 days. The antacid treatment led to a significant increase in the height (0.464 +/- 0.02 mm v. 0.318 +/- 0.06) and in the volume (472 +/- 32 mm3v.328 +/- 45) of the fundic mucosa of the stomach, in the avera...

A sulfate solution containing 1773.965 mg/L Mn2+, 3216.178 Mg2+ and 566.254 Ca2+ was used to perform the maximum recovery of manganese minimum magnesium. Carbonate precipitation due better selectivity for over magnesium other impurities compared hydroxide precipitation. Four factors were studied: pH value, contact time, reaction temperature sodium carbonate consumption. Analysis variance (ANOVA...

The hydride shift mechanism of D-Xylose Isomerase converts D-glucose to D-fructose. In this work, we compute features of a “hydroxide once” mechanism for the hydride shift with quantum chemical calculations based on the 3KCO (linear) and 3KCL (cyclic) X-ray/neutron structures. The rigid boundary conditions of the active site “shoe-box”, together with ionization states and proton orientations, e...

Mineral wools are the most common insulation materials in buildings worldwide. However, mineral wool waste is often considered unrecyclable because of its fibrous nature and low density. In this paper, rock wool (RW) and glass wool (GW) were studied as alkali-activated material precursors without any additional co-binders. Both mineral wools were pulverized by a vibratory disc mill in order to ...