Various morphologies of magnesium carbonate hydrates have been synthesized by carefully adjusting the reaction temperature and pH value of the initial reaction solution in the precipitation process. At lower temperatures (from room temperature to 328 K) and lower pH values (variation with the reaction temperature), magnesium carbonate hydrates are prone to display needlelike morphology, and the...

BACKGROUND The neutrophil-to-lymphocyte ratio (NLR) has emerged as a new marker of inflammation associated with the severity of several respiratory and cardiac diseases. MATERIALS AND METHODS We investigated whether the degree of systemic inflammation in sarcoidosis patients as measured by the NLR is associated with pulmonary hypertension (PH). RESULTS A NLR > 3.5 occurred with a significan...

Stroke remains a significant problem despite decades of work on neuroprotective strategies. NMDA receptor (NMDAR) antagonists are neuroprotective in preclinical models, but have been clinically unsuccessful, in part due to side effects. Here we describe a prototypical GluN2B-selective antagonist with an IC50 value that is 10-fold more potent at acidic pH 6.9 associated with ischemic tissue comp...

1. The maximum rate of CO(2) production of Bacillus butyricus was found to be at a pH value of 7; of Bacillus subtilis at pH 6.8. If the pH value be raised or lowered there is a progressive decrease in the rate of production of CO(2). 2. Spontaneous recovery follows the addition of alkali to either organism, while addition of acid is followed by recovery only upon addition of an equivalent amou...

Two methodologies for obtaining accurate blood gas and electrolyte values during cardiopulmonary bypass (CPB) are traditional laboratory analyzers, which use an electrochemical technology, and continuous in-line monitoring systems, which use a fluorometric and/or spectrophotometric technology. The purpose of the present study was to evaluate the accuracy of a new continuous in-line monitor, the...

When living cells of Nitella are exposed to a solution of sodium acetate and are then placed in a solution of brilliant cresyl blue made up with a borate buffer mixture at pH 7.85, a decrease in the rate of penetration of dye is found, without any change in the pH value of the sap. It is assumed that this inhibiting effect is caused by the action of sodium on the protoplasm. This effect is not ...

Each biological system possesses a widely unrecognized buffer to maintain acid-base balance specific pH. The skin pH is crucial for physiological function. In aged or diseased skin, increase observed and may negatively affect health. Skin care products with that slightly more acidic than the average normal have an adequate buffering capacity, are considered beneficial skin. However, capacity of...

We recently described two mutant recA proteins, (G160N)recA and (H163A)recA, which have full single-stranded DNA-dependent ATP hydrolysis activity but which are unable to promote the ATP-dependent strand exchange reaction under standard reaction conditions (pH 7.5). These mutant proteins, however, are able to promote strand exchange at pH 6.0 to 6.8. Here we show that this activation correlates...

in this study, the effect of hormon ovafact (gnrha) on biological semen characteristics (motility duration, percentage of motile spermatozoa, spermatocrit, sperm density, milt volume, ph, na+, k+, ca+, mg2+, total protein, cholesterol and glucose) in sub species commons, comets, wakins and fantail goldfish (carassius auratus gibelio) males was compared. from each treatment ten males has been in...

The aim of this study was to evaluate the effect of acetic NaF solutions on fluoride-containing restorative materials. As the pH value of solution decreased, the degree of microhardness change in restorative materials increased- regardless of product. Dyract AP (DA) and F2000 (F2) (polyacid-modified resin composites) showed the greatest decrease in microhardness after immersion for three days. ...