منابع مشابه
Photometric Determination of Estrogens
The Kober color test for the identification of natural estrogens (1) is a 2-phase reaction. The first effect of heating estrogens with the phenolsulfonic acid reagent is the production of a yellowish brown-colored solution; when this solution is chilled, carefully diluted with water, and then reheated, its color gives way to a characteristic pink. The Z-phase nature of the reaction renders its ...
متن کاملPhotometric Determination of Quasar Candidates
We describe an efficient and fast method for the detection and classification of quasars using a machine learning tool, making use of photometric information from SDSS DR7 data release. The photometric information used are the ten independent colours that can be derived from the 5 filters available with SDSS and the machine learning algorithm used is a difference boosting neural network (DBNN) ...
متن کاملPhotometric determination of catalase activity.
Catalase activity may be measured quantitatively by the method of von Euler and Josephson (1) by allowing the enzyme solution to react with hydrogen peroxide for varying periods of time and measuring the excess peroxide remaining by titration with potassium permanganate. The similarity of this titration procedure to the assay of ascorbic acid by titration with 2:6-dichlorophenolindophenol sugge...
متن کاملDirect photometric determination of globulin in serum.
A convenient method for direct photometric determination of total globulin in serum has been developed using a one-tube, one.reagent system. The analysis is based on a variation of the Hopkins-Cole reaction, in which glyoxylic acid condenses with the tryptophan residues present in globulin to produce a purple color. In the presence of copper and under the conditions of the analysis, color inten...
متن کاملDetermination of Glutaraldehyde by Photometric Microtitration
The deteriorating quality of the environment and consequently stricter emission limits force the produc ers of pollutants to modernize their current technolo gies, to reduce technologies with toxic materials or to v minimalize emissions. The industrial use of formaldehyde in various fields such as textile, wood, leather, and food process ing industry causes a major environmental problem. For...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1941
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)51394-6