Chemical Stability of Disodium Phenyl Phosphate in Carbonate-Bicarbonate Buffer

A sodium carbonate-bicarbonate buffer for alkaline phosphatases.

For the study of alkaline phosphatase systems a non-phosphate-containing buffer is required. The buffers in common use for the alkaline pH range are ammonia, borate, glytine and veronal. Ammonia and borate have a retarding effect on the rate of ,enzymic hydrolysis of phosphoric esters. Glycine activates phosphatase when present in very low concentrations (0 1-1 mm), but in the concentrations us...

Coral reef calcifiers buffer their response to ocean acidification using both bicarbonate and carbonate.

Central to evaluating the effects of ocean acidification (OA) on coral reefs is understanding how calcification is affected by the dissolution of CO(2) in sea water, which causes declines in carbonate ion concentration [CO(3)(2-)] and increases in bicarbonate ion concentration [HCO(3)(-)]. To address this topic, we manipulated [CO(3)(2-)] and [HCO(3)(-)] to test the effects on calcification of ...

Electrochemical Investigation of Mo(VI)-MTB-ClO-3 System in Phosphate Buffer

The reduction mechanism of molybdenum-methyl thymol blue (MTB)-chlorate system has been investigated in water on a mercury electrode. As this system is very sensitive for ultratrace determination of molybdenum, the actual mechanism involved was studied. Electrochemical techniques, including dc tast polarography and cyclic voltammetry were employed. It is shown that, the cathodic wave of mol...

CALCIUM PHOSPHATE CEMENT: STUDY OF (BETA-TRICALCIUM PHOSPHATE, DICALCIUM PHOSPHATE AND CALCIUM CARBONATE SYSTEM

Calcium phosphate cements (CPCs), using B-tricalcium phosphate (ß-TCP, Ca3 (P04)2), dicalcium phosphate (DCP, CaHP04), calcium carbonate (Ca CO3), and hydroxylapatite (HAp, Ca10(P04)6(OH)2) as powder cement and disodium hydrogen phosphate (Na2HP04) solution as liquid component were prepared. After mixing the powder and liquid constituents, injectable and self-setting calcium phosphate cements (...

Chemical stability of grain boundaries in β-tricalcium phosphate ceramics