| 词汇 | trace-element |
| 释义 | trace element noun[ C ] uk /ˈtreɪs ˌel.ɪ.mənt/ us /ˈtreɪs ˌel.ɪ.mənt/ one of several types of simple chemical substance that are necessary for healthy growth and development, and exist in animals and plants in very small amounts微量元素 Biochemistry adipose adrenalin albumin aldosterone amino acid endonuclease endorphin enzymatic enzymatically enzyme messenger RNA mRNA mycoprotein non-enzymatic nuclease serotonin spike protein T level testosterone transfer RNA Examples of trace elementtrace element Calculation of simultaneous isotopic and traceelement variations during water-rock interaction with applications to carbonate diagenesis. The heat stable factor which effects these increases in growth could be a specific ion or a traceelement. Major and traceelement abundances were measured on fused discs and pressed pellets, respectively. We use traceelement geochemistry to constrain the protolith source of the amphibolites. The effect of crustal contamination on lava compositions is most readily apparent in major and traceelement data. An amelioration of body weight gain, reduction of mortality and restoration of traceelement levels were estimated in infected chickens. Based on petrographical investigations, 44 representative samples were selected for major and traceelement analyses. The traceelement variation within groups is very small. Copper is an essential traceelement but most diets contain a little more copper than is needed. Identification of petrogenetic processes using covariance plots of traceelement data. Appendices provide clearly tabulated data on major and traceelement analyses for all the samples discussed in these chapters. It exhibits a wide traceelement compositional range. We therefore suggest that the analysed part of the gabbroic pegmatite represents a 'cumulate' from which an incompatible traceelement-enriched melt has escaped. Representative basalt samples were selected for major and traceelement analysis, excluding those with obvious alteration. The changes in major and traceelement composition of the samples are very complex and seem not to change systematically. See all examples of trace element 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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