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Journals and Conferences
A simple method to evaluate rough values of complex-formation constants has been developed. We have determinedk 1*-values for Cu+2 and aromatic hydrazides.k 1* is suitable for comparison with biological results.
A compound originally prepared by Alfred Werner but structurally misassigned has been shown by three independent X-ray structural analyses to be a hexanuclear species which can now be regarded as Werner's second hexol, his first being that famous for being the first non-carbon containing species to be optically resolved.
Cu2+-complexes with different monodentate ligands PYR, e.g. pyridine, 2,4,6-collidine and imidazole, catalyse the oxidation ofo-phenylenediamine (H2B) to 3,5-dihydro-2-amino-3-iminophenazine (PHEN) by O2. Investigation of the electron paramagnetic resonance during reaction gives interesting details on the function of Cu2+ as a catalyser. The formation of… (More)
The possible role of the metabolism of heavy metal ions in the process of ageing is discussed. It is suggested that, during this process, Cu2+ and Fe3+ as strong complexing ions, inhibit the activity of other metal enzymes by replacing their metal ion-activator. The relative stability of Cu2+- and Fe3+-complexes with various chelating compounds related to… (More)
The activity of hexokinase has been determined in the presence of different metal ions. Besides Mg2+, the ions Co2+, Ni2+, Mn2+, Zn2+, and Cd2+ show remarkable activation. The differences are explained by superposition of an activating and an inhibiting function. The specifity problem is discussed.
The affinity of H+ and various metal-ions towards complexing agents of biological importance is characterised by the formation constantk*. The binding state of Cu2+ in human plasma is discussed and the amount of free Cu2+ is estimated to about 10−6 moles per liter.