| 词汇 | amylase |
| 释义 | amylase noun[ U ] chemistry specializeduk /ˈæm.ɪ.leɪz/ us /ˈæm.ə.leɪz/ an enzyme (= a chemical substance made by living cells) in saliva, plants, and in the pancreas that helps change starch into sugar淀粉酶（唾液、植物和胰腺中含有的淀粉酵素，帮助将淀粉糖转化为糖） Biochemistry adipose adrenalin albumin aldosterone amino acid endorphin enzymatic enzymatically enzyme fatty acid mRNA mycoprotein non-enzymatic nuclease nucleic acid spike protein T level testosterone trace element transfer RNA amylase | American Dictionaryamylase noun[ U ] us/ˈæm·əˌleɪs, -ˌleɪz/ biology an enzyme (= substance that causes chemical change) that helps to change starch (= substance found in plants) into sugar Examples of amylaseamylase Furthermore, serum amylase was elevated significantly only in the piglets with left-to-right shunts. Inheritance of a parotid secretory protein in mice and its use in determining salivary amylase quantitative variants. It is likely that the substrates of amylase in embryos are the starch granules accumulated during development. Genetic factors on both the second and third chromosomes were responsible for the variation in amylase specific activity and inducibility. The function of genetic factor(s) on the second chromosome is expected to be the repression of amylase activity in non-induced environments. The amylases that degrade the starchy endosperm after germination are largely secreted by the aleurone layer after imbibition (see below). A further interesting observation on the interaction between sugars and amylase gene expression comes from the shrunken-2 (sh-2) maize mutant. Increased concentrations of salivary gland extracts led to increased amylase activity (fig. 2). High correlations for the secondchromosome substitution lines and low correlations for the third-chromosome substitution lines were observed for amylase specific activities in different media. The function of the genetic factor(s) on the third chromosome is expected to be the induction of amylase activity in induced environments. The average activity of amylase for the second-chromosome substitution lines was lower than that for the third-chromosome substitution lines. The amylase activity in normal food may be affected by both induction and repression. The results of an analysis of variance showed that both second- and third-chromosome components are responsible for genetic variations in amylase activity and inducibility. Genetic variability of inducing factors of amylase and fitness. Aliquots ranging from 10 to 80 ml of gland extract (for amylase and protease activity respectively) were used for the enzyme assays. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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