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Equilibrium analysis of solutions containing cations and ligands biologically interesting
No full textLead(II) deoxycholate and glycodeoxycholate solubility and building of relative electrodes.
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Complex formation between cadmium(II) and histidine or ornithine.
No full textThe behaviour of histidine and ornithine as ligands (L) towards cadmium(II) has been studied at 25-degrees-C. Complex formation between histidine and cadmium(II) has been investigated in two ionic media 1 M NaCl and 1 M NaClO4, while the system ornithine - cadmium(II) has been studied in 1 M NaCl.
Experimental data, obtained by measuring the electromotive force of galvanic cells containing glass and stationary diluted cadmium amalgam, were explained by assuming formation of CdL+, CdHL2+, CdH2L3+, CdL2, CdHL2+, and CdH2L22+. In 1 M NaClO4 species CdH2L22+ was not present in appreciable concentration. The stability constants of each complex have been determined showing that protonated species prevail in a wide range of concentration of reagents, even in neutral or moderately alkaline solution. The results have been discussed and compared with those obtained for aspartate and glutamate
ANALYSIS OF LIPIDS IN MILK
No full textChromatographic analysis has been used to separate threelipid fraction of milk: non polar lipids, glycolipids and phospholipids. Each of them was analysed by thin-layer chromatography and gas chromatography. Most of the components of the three fraction have been identified; the amounts of the different fatty acids were measured by means of gas chromatographic analysis of the various fractions
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