The deposits of clinoptilolite (CLI) in Iran after activation with sodium chloride or sodium hydroxide solution was subjected to ion exchange with some heavy and toxic cations. The results showed that the absorption for Ca2+ (7.5 ppm), Cu2+ (50 ppm), Zn2+ (40 ppm), Cd2+ (40 ppm), Pb2+ (500 ppm) and Al3+ (5 ppm) were 95.2, 96.70, 93.30,99.12, 99.2 and 90.0 percents, respectively. The noteworth...

Hypertension is a predictor of dementia and is associated with subtle deficits in cognitive performance in strokeand dementia-free individuals.1 Younger hypertensive individuals may be as vulnerable to subtle progressive decline in cognitive ability as older individuals, although the pathophysiological mechanisms involved may be different.1,2 Hypertension-associated structural and functional ch...

The percentage composition of Al13, [AlO4Al12(OH)24(H2O)12]7+, in water treatment coagulants is an important criterion in the development and use of polymeric coagulants. Polymeric coagulants are generally used in cold climates or with highly turbid waters. Size exclusion chromatography flame atomic absorption spectrometry (SEC-FAAS) can separate Al13 and monomeric Al within 6 min. The percenta...

Military service personnel have been reported to experience increased mental and physical problems after combat deployment.1,2 Likewise, attrition from military service and increased use of mental health services have been observed.1,2 Recent large prospective epidemiological studies have shown a covariation of combat exposure with selfreported posttraumatic stress disorder and depressive sympt...

The intensity of the tryptophan fluorescence of the alpha subunits of guanine nucleotide-binding regulatory proteins increases when they bind guanosine 5'-O-(3-thio)triphosphate (GTY gamma S). The kinetics of the fluorescence enhancement and of the measured binding of [35S]GTP gamma S are well correlated. The addition of Mg2+ to the nucleotide-bound proteins causes a further, rapid increase in ...

Cardiovascular surgical procedures/history/trends. The cardiovascular surgery was and has been intensely scrutinized and evaluated. Cardiac surgeons have, in turn, consistently directed the efforts in collecting, analyzing and applying the surgical results in order to improve quality and reassess conducts and procedures1. In this context, the Brazilian cardiac surgery is one of the most respect...

The title compound, hepta-sodium trialuminium tetrakis(diarsenate), has been isolated as single crystals from a solid-state reaction. Its structure, which is isotypic with that of the Na7Fe3(X 2O7)4 (X = As, P) family of compounds, consists of AlO6 octa-hedra sharing their vertices with As2O7 groups, forming a three-dimensional [Al3(As2O7)4]∞ framework incorporating channels occupied by the sod...

Stroke is one of the most feared untoward sequelae associated with atrial fibrillation (AF) ablation procedures, whereas bleeding is the most common.1,2 We typically explain to patients that intensive anticoagulation during ablation is necessary to decrease the likelihood of stroke, even though some increase in bleeding and vascular complications will occur. In the present issue of Circulation,...