广口瓶
发表于 2025-3-26 22:12:46
Continuous Scintillation Counting of Amino Acid Analyzer Column EluatesThe widespread use of chromatographic separations of corn-pounds, and particularly the introduction of automated systems such as amino acid analyzers, has led to considerable interest in the development of automatic counting equipment which can be used in direct conjunction with column chromatography.
轻触
发表于 2025-3-27 02:22:17
The Microchemical Identification of Steroids from Biological MediaSteroid hormones are normally present in body tissues and fluids in microgram quantities. Therefore, it has become necessary to devise and apply microanalytical techniques to the isolation and identification of these compounds.
恶臭
发表于 2025-3-27 06:07:56
Quench Correction by Automatic External StandardizationNormalization of liquid scintillation counting data frequently calls for the application of a quenching correction factor. Because this factor may be different for each sample in a series of variable composition, a determination of the extent of quenching must be made for each sample counted.
杠杆
发表于 2025-3-27 11:56:12
Multiple Labeling to Determine Metabolic Pathways: Use of Labeling RatiosThe story of the metabolism of ethanol in man has been of interest to many people and to many kinds of research workers. Problems in physiology, pharmacology, biochemistry, psychology, and sociology are involved.
洁净
发表于 2025-3-27 15:34:54
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detach
发表于 2025-3-27 18:59:57
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四牛在弯曲
发表于 2025-3-28 00:57:15
C14-Labeling Using Carbene Insertion—Application to Saturated Hydrocarbonse of them than would be expected. This is due chiefly to difficulties in obtaining radioactive tracers in their proper chemical forms. Labeled compounds that can be purchased are generally expensive, are sometimes of questionable purity, and the time for delivery may be excessive.
TIGER
发表于 2025-3-28 05:06:43
Purification of High Specific Activity Acetic-H3 Anhydrideoying the double-isotope-derivative method for the assay of steroids in biological fluids. These difficulties have been experienced particularly during the assay for steroids which are present in very low concentration, e.g., testosterone and etiocholanolone.
temperate
发表于 2025-3-28 09:33:36
Analytical Studies Using Low Levels of Carbon-14 and Tritium: A Method for Determining the LabelingFull use of a specific label is achieved when procedures are also available which permit specific degradation of products and ultimate recovery of the isotope in a degradation product that pinpoints the exact location of the tagged atom.
使隔离
发表于 2025-3-28 10:35:59
https://doi.org/10.1007/978-3-662-64008-1e Co/Mo/S on Al.O. as a catalyst for this exchange, and to determine optimum conditions for yield and minimum decomposition. It was also hoped that as a result of determining the deuterium distribution in the molecule, some insight into the mechanism of exchange on this catalyst would be gained.