Development of a Colorimetric Method for Functional Chloride Channel Assay

A Colorimetric Method for Determination of Serum Chloride.

HAVE INSTITUTED a colorimetric chloride procedure which has been in use for 3 years in our laboratory and has met with great success. This colorimetric method is based on a procedure used in automated syStems* (2, 3). It is extremely simple, quite accurate, and gives highly reproducible results even in the hands of student technicians. Those laboratories not having access to a chloridometer or ...

A new colorimetric method for the assay of erythromycin.

A chemical assay method which depends upon the development of intense absorption at 485 nm has been found satisfactory for the assay of erythromycin and its stearate from tablets, suspensions and other preparations. Its utility is brevokable for the determination of this antibiotic at all stages of manufacture, process and formulation, and it is more rapid and reproducible than the bioassay (JP...

A Colorimetric Assay Method for 3-Hydroxy-5-steroid Dehydrogenase

tissues such as adrenal, ovary, testis, and placenta. 3b-Hydroxy-D-steroid dehydrogenase is an imIt is a microsomal NAD-dependent enzyme that catportant enzyme of steroid hormone biosynthesis alyzes the conversion of pregnenolone to progesterpresent in steroidogenic tissues like adrenal, testis, one, a rate-limiting step in the biosynthesis of horand ovary of vertebrates. The enzyme is assayed ...

Colorimetric Assay for Antifungal Susceptibility

A colorimetric assay for releasable plasminogen activator.

We describe an equilibrium assay for measuring release of plasminogen activator form blood-vessel walls and report data from 125 individuals free of overt thromboembolic disease. Excess human plasminogen is added to the euglobulin fraction of plasma obtained before and after venous occlusion at mean systolic pressure. To measure plasmin generation in these samples, we used the chromogenic plasm...