When living cells of Nitella are exposed to a solution of sodium acetate and are then placed in a solution of brilliant cresyl blue made up with a borate buffer mixture at pH 7.85, a decrease in the rate of penetration of dye is found, without any change in the pH value of the sap. It is assumed that this inhibiting effect is caused by the action of sodium on the protoplasm. This effect is not ...

The electrochemical behavior of passive Fe and thin, sputter-deposited films of Fe2O3 was studied in borate and phosphate buffer pH 8.4 solutions. Cyclic voltammograms and in situ light absorption measurements which enable the monitoring of the oxide film thickness indicate a similar behavior of the Fe electrode in both pH 8.4 solution, especially a presence of a oxide-free surface at low catho...

The nitrate-selective copperised-cadmium (Cu-Cd) reduction reaction coupled directly to the highly sensitive nitrite ion chromatographic detection, produced a more precise method for determination of nitrate than any one of the two conventional methods. A borate buffer solution used in the reduction reaction, in place of the conventional ammonium-EDTA buffer solution, eliminated interferences f...

In 0.05 M potassium phosphate buffer (pH 7.0, ZO”), native rabbit muscle aldolase has been found to exhibit a molecular weight (mn N g, pZ) close to 160,000, in agreement with previous findings. Upon exposure to cold alkaline borate buffer (pH 12.5, p = 0.17, 0”), the enzyme spontaneously dissociates into its monomers which subsequently undergo slow hydrolytic degradation. Compensating for elec...

In 0.05 M potassium phosphate buffer (pH 7.0, ZO”), native rabbit muscle aldolase has been found to exhibit a molecular weight (mn N g, pZ) close to 160,000, in agreement with previous findings. Upon exposure to cold alkaline borate buffer (pH 12.5, p = 0.17, 0”), the enzyme spontaneously dissociates into its monomers which subsequently undergo slow hydrolytic degradation. Compensating for elec...

In 0.05 M potassium phosphate buffer (pH 7.0, ZO”), native rabbit muscle aldolase has been found to exhibit a molecular weight (mn N g, pZ) close to 160,000, in agreement with previous findings. Upon exposure to cold alkaline borate buffer (pH 12.5, p = 0.17, 0”), the enzyme spontaneously dissociates into its monomers which subsequently undergo slow hydrolytic degradation. Compensating for elec...

Cultures of C. elegans containing a high proportion of males were subjected to chemotactic tests by using the method of countercurrent separation. The responses of males and hermaphrodites were determined. Both types of worms preferred Na over 1/2 Ca(2), Cl over NO; they were attracted to NaCl, OH, cyclic AMP, pyridine, CO, in borate buffer (pH 8.8); and avoided CO in phosphate buffer (pH 6.0),...

Dicarbonyl sugars were separated by capillary electrophoresis as o-phenylenediamine derivatives (quinoxalines). Tetrabutylammonium bromide was used as a modifier; n-arabino-2-hexosulose (n-glucosone), D-lyxo-2-hexostdose (D-gdaCtOSOnC), 7-deoxy-L-galacto-2-hexosulose and 5-hydroxy-2,3dioxohexanal served as standards. The separation procedure was optimized with respect to pH, buffer and solute c...