The present investigation aimed at the determination of Cr addition on microstructure, phase composition, and mechanical properties Al-Cu-Y-Zr alloy. Quasi-binary alloys ternary Al-Cu-Y system with atomic rotation Cu/Y = 4/1 have a narrow solidification range high solidus temperature. 0.3% in Al-5.1Cu-1.7Y-0.3Zr alloy provides formation novel quaternary Al81–85Cu7–10Y3–4Cr5 phase. L12-Al3(Zr,Y)...

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 ...