Colorimetric method for the estimation of malathion.

An improved colorimetric method for the quantitative estimation of thymine.

The Hunter (1) procedure was originally developed for the calorimetric d&&ion of minute amounts of thymine. In this procedure thymine is coupled under air with p-diazobenzenesulfonic acid in carbonate solut.ion, and a red color is subsequently produced by the addition of sodium hydroxide and hydroxylamine. Thymine was determined by this means in hydrolysates of dcsoxypentose nucleic acids (DNA)...

A Method for the Colorimetric Estimation of Carnosine.

A colorimetric method for the estimation of serum magnesium.

I955 The author wishes to express his sincere appreciation to Dr R. E. Hungate for an introduction to the fascinating cattle protozoa and for many stimulating discussions during the course of the experiments. The investigation was supported in part by funds for biological and medical research by the State of Washington, initiative measure number 171. In clinical work, where general electrolyte ...

A Colorimetric Method for the Estimation of Blood Calcium

A colorimetric method for the estimation of succinic dehydrogenase activity.

Many methods for the measurement of succinic dehydrogenase activity have been proposed (l-20). These have varied from measurement of the entire system of electron transport with oxygen as the final acceptor (5, 21), to the determination of succinic dehydrogenase activity itself (6, 9, 22). The assay of succinic dehydrogenase alone was made possible by the finding that phenazine methosulfate can...