Calcium complexes biology

Calcium-binding proteins, 6, 564, 572, 596 intestinal, 6, 576 structure, 6, 573 Calcium carbonate calcium deposition as, 6, 597 Calcium complexes acetylacetone, 2, 372 amides, 2,164 amino acids, 3, 33 arsine oxides, 3, 9 biology, 6, 549 bipyridyl, 3, 13 crown ethers, 3, 39 dimethylphthalate, 3, 16 enzyme stabilization, 6, 549 hydrates, 3, 7 ionophores, 3, 66 malonic acid, 2, 444 peptides, 3, 33 phosphines, 3, 9 phthalocyanines, 2,863 porphyrins, 2, 820 proteins, 2, 770 pyridine oxide, 3,9 Schiff bases, 3, 29 urea, 3, 9... 

The only common redox titration applied in the clinical laboratory is for the analysis of calcium in biological fluids. Calcium oxalate is precipitated and filtered, the precipitate is dissolved in acid, and the oxalate, which is equivalent to the calcium present, is titrated with standard potassium permanganate solution. This method is largely replaced now by more convenient techniques such as complex-ometric titration with EDTA (Chapter 9) or measurement by atomic absorption spectrophotometry (Chapter 17). 

Neurospora crassa calcium transport, 571 cation transport, 559 Neurosporin, 676 Neurotransmitters secretion calcium, 595 Neutral complexes electrical properties, 143 Neutron absorbers reprocessing irradiated nuclear fuel criticality, 926 Neutron activation analysis metal complexes biology, 550 Neutron capture fission product, 883 Nickel... 

Crystal Structure Studies of Calcium Complexes and Implications for Biological Systems... 

Since, as mentioned above, calcium plays veiy important role in biological systems, our studies are devoted to calcium complexes with polyphenol glycosides. So this review will be devoted mostly to describe the research done on calcium-carbohy-... 

An important aspect for materials with applications in the biomedical field is the use of nontoxic catalysts. Biologically nontoxic magnesium and calcium complexes have been successfully employed for the ROP of TMC however, the toxicity of the salen ligands has not been assessed, and polymerization... 

The factors considered above demonstrate that in many respects the rare earth ions resemble the alkaline earth ions in their complex-forming tendencies more closely than they do the d-transition elements. Indeed one of the more recent uses of the rare earth ions is as a substitute for calcium in biological systems. 

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