| 单词 | biological assay | 
| 释义 | > as lemmasbiological assay  b.  Esp. in  biological assay (= bioassay n.), the determination of the strength of a substance by means of a test on an organism, usually in comparison with the effect of a standard preparation. ΘΚΠ the world > action or operation > endeavour > trial or experiment > trial, test, or testing > 			[noun]		 > specific tests or testing > of strength of a substance on an organism bioassay1912 biological assay1922 biological assay1926 immunoassay1959 1922    Burn  & Dale Rep. Biol. Stand. I. 50  				We do not assume that it will be necessary to make a new batch of the Standard for the assay of every batch of the commercial extract. 1927    J. H. Burn  & J. M. Ellis in  Pharmaceut. Jrnl. 9 Apr. 384/1 		(title)	  				The Biological Assay of the Specific Alkaloid of Ergot. 1928    H. H. Dale in  J. H. Burn Methods Biol. Assay p. x  				The most serious difficulty in biological assay is that due to the variability of the living reagent. 1961    Lancet 22 July 214/1  				The daily urinary loss of vitamin B12..was measured in three patients by microbiological assay. biological assay   biological assay  n. measurement of the concentration, potency, or other properties of a substance by its qualitative or quantitative effect on living cells or organisms. ΘΚΠ the world > action or operation > endeavour > trial or experiment > trial, test, or testing > 			[noun]		 > specific tests or testing > of strength of a substance on an organism bioassay1912 biological assay1922 biological assay1926 immunoassay1959 1926    Lancet Nov. 982/1  				Dr. J. H. Burn, director of the society's pharmacological laboratories, will read a paper on Some Methods of Biological Assay. 1953    S. K. Kon  & J. W. G. Porter in  G. H. Bourne  & G. W. Kidder Biochem. & Physiol. of Nutrition ix. 323  				Thiamine-deficient rats..have a considerably slowed heart beat (bradycardia), which has been used as the basis of a biological assay of the vitamin. 1999    New Scientist 23 Jan. 62 		(advt.)	  				You will develop and carry out biological assays for the discovery of novel insecticidal and nematicidal agents. < as lemmas  | 
	
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