2.5 and 1.25 per cent gelatin have been titrated potentiometrically in the absence of salts and in the presence of two concentrations (0.0750 and 0.0375micro) of NaCl, MgCl(2), K(2)SO(4), and MgSO(4). The data have been used to calculate values of +/- S = v(z) - (v - 1)(z), where v(z) = v(2) - (v(2) - v) r(x)/18. The maximum and minimum values of S with NaCl were used to calculate the mean dist...

Bovine 6S procarboxypeptidase A can be dissociated into its three subunits by acylation with dimethyl maleic anhydride. The deacylated subunits are obtained in a largely native form due to instability of the bonds to dimethyl maleate at pH values near neutrality. The seven first residues of subunit III are identical to residues 18-24 of bovine chymotrypsinogen B and very similar with the same r...

Various ion-selective electrodes based on valinomycin (Table 1) have been widely used for determination of the K + concentration in whole blood, blood plasma, and undiluted and diluted blood serum, as well as in diluted urine [for a review see (1)]. Plasticized poly(vinylchloride) membranes (columns 2 and 3 in Table 1) have been of special interest. Although these electrodes, especially the one...

Concurrent equilibrium studies are of most extreme imperative to manage organic, medicinal and ecological issues emerging because of cutting edge specialized improvements. But in manufactured blends experienced in research facilities, metal ions or ligands never exist in secluded form requiring a top to bottom investigation of multi-metal and multi-ligand equilibria in solution. Accordingly the...

Nitrapyrin (Nt) at 10 ppm, compared to water control, added to a soil-sand-peat medium decreased shoot growth of tomatoes (Lycopersicon esculentum Mill. cv. Marglobe) grown with NOJ-N nutrition but had no effect on growth with NH.-N nutrition. While plant water stress was decreased by NI compared to the control with NOJ-N nutrition, the toxic effect of increased uncombined NH. concentration in ...

The physico-chemical and microbial characteristics in soil was investigated in order to study the mobility and bioavailability of Chromium in the environment. In the present investigation the role of soil microbes along with some physico-chemical agents (UV ray, Mn and Fe) were studied for possible oxidation of Cr(III) to Cr(VI) in laboratory conditions. Photochemical oxidation of Cr(III) to Cr...