The results of experimental studies on the phase formation CaAl2O4 (CA) and CaAl4O7 (CA2) from CaCO3-Al2O3 powder mixtures in temperature range 1250 - 1450 ° C ate presented. In order to calculate content raw materials charge, criterion obtaining high-alumina clinker with Al2O3 71 72 wt. % CaO 27 28 wt.% is proceeded. This mass ratio system state diagram suggests presence two calcium-aluminate ...

ion channels are responsible for control of cell function in excitable tissues such as heart and brain and also in organs and tissues traditionally thought to be non- excitable including liver and epithelium. in the present research, the effect of lead (pb2+) on ca2+ -dependent action potential and currents was studied in f77 neuronal soma membrane of helix aspersa. for this purpose, action pot...

the complexation reactions between mg2+, ca2+, sr2+ and ba2+ metal cations with 15-crown-5 (15c5) were studied in acetonitrile (an)-methanol (meoh) binary mixtures at different temperatures using conductometric method. 15c54 forms 1:1 complexes with mg2+, ca2+ and sr2+ cations in solutions. the ma2+ cation forms a 2:1 complex (ratio of lighand to cation) in solutions. a linear relation was obse...

Abstract Introduction Calmodulin (CaM) is a highly conserved mediator of calcium (Ca2+) dependent signalling. Its flexible structure allows CaM to bind and modulate many targets, including cardiac ion channels. Genotyping has revealed several mutations associated with congenital disorders heart rhythm, known as long QT-syndrome (LQTS). LQTS patients suffer from prolonged ventricular recovery ti...

TOPIC: Lung Cancer TYPE: Original Investigations PURPOSE: Non-small cell lung cancer (NSCLC), one of the leading causes cancer-related death, has a low 5-year survival rate owing to inevitable acquired resistance toward antitumor drugs, platinum-based chemotherapy, and targeted therapy. Epidermal growth factor (EGF)-EGF receptor (EGFR) signaling activates downstream events phospholipase C/inosi...

We developed a method to evaluate the activity of Na+–Ca2+ exchanger (NCX) and sarco-endoplasmic reticulum Ca2+-ATPase (SERCA) with fluorescence microscopy in mouse ventricular cardiomyocytes. In non-beating cardiomyocytes, α-adrenoceptor stimulation by phenylephrine caused decrease cytoplasmic Ca2+ concentration, which was inhibited SEA0400, an NCX inhibitor, but not cyclopiazonic acid, SERCA ...

Type 1 ryanodine receptor (RyR1) releases Ca2+ ions from the sarcoplasmic reticulum of skeletal muscle to initiate contraction. Multiple endogenous and exogenous effectors activate RyR1. Cryo-electron microscopy has identified binding sites three co-activators Ca2+, ATP caffeine, however, mechanism co-regulation synergy between these activators remains be determined. Here, we tested hypothesis ...

Effects of salt stress on absorption and distribution osmotic ions in wheat seedlings were studied with 4 winter varieties under NaCl by exploring dynamic changes Ca2+, K+, Na+, Ca2+/Na+, K+/Na+ Na+ limiting ability. The results showed that the contents Ca2+ ratio gradually decreased a manner both concentration dependent time dependent. extent reduction K+ root was much more severe than shoot. ...

extracellular ca 2+ concentration ([ca2+]o) may be one of the factors affecting atrial natriuretic factor (anf) release. in the previous studies, there are opposite reports about the effect of [ca2+]o on anf secretion. therefore, the effect of [ca2+]o depletion on anf secretion and gene expression was studied in the present research. isolated right atria from rats were perfused for 6 and 2 hour...

In this issue of Neuron, Mankin et al. (2015) show that CA2, an oft-neglected hippocampal subregion, has place representations that change from one episode to the next, even as the spatial environment does not. This finding may help explain how time is encoded in episodic memories.