- 行业: Printing & publishing
- Number of terms: 178089
- Number of blossaries: 0
- Company Profile:
McGraw Hill Financial, Inc. is an American publicly traded corporation headquartered in Rockefeller Center in New York City. Its primary areas of business are financial, publishing, and business services.
A bioassay based upon the ability of some compounds (for example, vitamin B<sub>12</sub>) to enhance the growth of some organisms or compounds and to repress the growth of others; used to assay certain antibiotics.
Industry:Chemistry
An analytical technique including procedures for separating and reproducibly measuring a radioactive tracer.
Industry:Chemistry
1. Colorimetric analysis of solution colors with a filter applied to the eyepiece of a conventional colorimeter. 2. Inspection of a pair of Nessler tubes through a filter.
Industry:Chemistry
An analytical device that converts the concentration of an analyte in an appropriate sample into an electrical signal by means of a biologically derived sensing element intimately connected to, or integrated into, a transducer.
Industry:Chemistry
Quantitative chemical analysis that is based on measurement of the absolute disintegration rate of a radioactive component having a known specific activity.
Industry:Chemistry
Evidence for the presence or the identity of a substance that is obtained by techniques such as spectroscopy, chromatography, or electrophoresis.
Industry:Chemistry
In a chemical analysis, the measured value that is obtained in the absence of a specified component of a sample and that reflects contamination from sources external to the component; it is deducted from the value obtained when the test is performed with the specified component present. Also known as analytical blank.
Industry:Chemistry
Use of radioactive indicator to track the transfer of material between two liquid phases in equilibrium, such as titration of <sub>110</sub>AgNO<sub>3</sub> (silver nitrate, with the silver atom having mass number 110) against potassium chloride.
Industry:Chemistry
In chemical analysis, a selected sample whose composition is unknown except to the person submitting it; used to test the validity of the measurement process.
Industry:Chemistry
