Abstract Heteronuclear calcium–iron carbonyl cation complexes in the form of [CaFe(CO) n ] + ( =5–12) are produced gas phase. Infrared photodissociation spectroscopy conjunction with quantum chemical calculations confirm that =10 complex is coordination saturated ion where a Fe(CO) 4 fragment bonded Ca(CO) 6 through two side‐on bridging ligands. Bonding analysis indicates it best described by b...

background: to evaluate and compare the efficacy of mineral trioxide aggregate (mta) and traditionally used calcium hydroxide (ca(oh)2) in inducing root end formation of immature roots of traumatized young permanent anterior teeth. materials and methods: the study was carried out on 22 nonvital, immature permanent maxillary incisors. samples were allotted into two groups – group i mta and group...

Factors modifying calcium efflux from rabbit skeletal muscle sarcoplasmic reticulum vesicles were examined after phosphate-supported calcium uptake reached steady state. Increasing external Ca”+ promoted calcium efflux by a mechanism that exhibited Michaelis-Menten kinetics; V,,, at 25” with 5 mM MgATP as substrate and 50 mM phosphate as calcium-precipitating anion was -400 nmol/mg/min and the ...

The purpose of this study was to investigate the effects of physical training and calcium intake on bone mineral density (BMD) of students with mental retardation. Forty mentally retarded boys (age 7-10 years old) were randomly assigned to four groups (no differences in age, BMD, calcium intake and physical activity): training groups with or without calcium supplementation (Tr+Ca+ and Tr+Ca-) a...

The effect of taurine on calcium homeostasis of isolated cochlear spiral ganglion neurons under normal and ototoxic conditions was investigated using fluo-3 calcium imaging. Sole application of taurine (15 mM) induced an increase in intracelluar Ca(2+) concentration ([Ca(2+)](i)), which was largely inhibited either by the application of an L-type calcium-channel blocker nifedipine or a calcium-...

A study was conducted to evaluate the effects of dietary supplementation of phytase B (product of the Aspergillus niger phyB gene expressed in Trichoderma reesei) on feed intake, laying performance, eggshell quality, and on phosphorus and calcium balance in laying hens. Seventy-two, 40 weeks old Hy Line Brown hens were fed for 14 weeks the following four phosphorus-deficient (0.12% nonphytate p...

Different Aluminum: alkaline earth metal atomic weight ratios effects on structure transformations in alanates nanopowders were studied. Changes in crystal structures from alane to alanates by increasing alkaline earth metals dopants in the mixture with slight changes in crystal structures from rhombohedral centered – trigonal (alane) to trigonal (magnesium alanate), and monoclinic (calcium ala...

Fluorescent indicators were used to detect stimulus-evoked changes in presynaptic levels of intracellular sodium (Na1) and calcium (Ca1) in granule cell parallel fibers in brain slices from rat cerebellum. Ca, increased during stimulation, and three exponentials were needed to approximate its return to prestimulus levels. Ca, decayed to -10% of peak levels with T 100 ms, to -1% of peak values w...

We examined the mechanism by which cyclic AMP-dependent protein kinase (PK) stimulates the calcium pump of cardiac sarcoplasmic reticulum vesicles. The Ca dependence of calcium uptake rates by 30 /ig/ml canine cardiac sarcoplasmic reticulum was measured at 25 °C in 120 mM KCl, 40 mM histidine buffer (pH 6.8), 5 mM MgATP, and an ATP-regenerating system (75 fig/ml pyruvate kinase + 5 mM phosphoen...