网络释义 1. 化学元素丰度 化学元素丰度(Abundance of the chemical elements)是在测量上与所有元素相比较所得到含量多寡的比值。丰度可以是质量(等…zh.wikipedia.org|基于13个网页必应词典应用 准确权威无广告去官网了解更多 下载手机版必应词典 iOS Windows Phone Android 体验P C 版必应词典Win32 版Microsoft 商...
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(redirected fromAbundance of the chemical elements) Wikipedia "Cosmic Abundance of Elements, using Solar System as Standard" cosmic abundance The relative proportion of eachelementfound in the Universe. The standard cosmic abundance is based on that of the Solar System, determined from observations of...
1973. Abundance of the chemical elements in man's diet and possible relations with environmental factors. Sci. Total Environ. 1:375-394.Hamilton EI, Minski MI. Abundance of the chemical elements in man's diet and possible relations with environmental factors. Sci Total Environ 1972/1973;1: ...
The mass of the chemical elements in samples of prepared diet from the United Kingdom together with changes in the mass of the elements in sugar with refining is described. The mass of strontium in human bone is considered in relation to the distribution of calcareous rocks to illustrate how ...
This paper expands upon this theory by developing and estimating a directed technological change (DTC) model to analyze the relative abundance correlations of relative prices, world production, and R&D, as well as their growth rates, for the 87 chemical elements present in the Earth's crust. ...
The earth's crust is defined as the solid outer shell of the earth,and delimited fromthe top,the earth rigid surface,down deep to the Mohorovicic discontinuity.By such adefinition,the abundance of chemical elements in the crust is recalculated by a newmethod,named the regional geochemical meth...
- abundant, abundance, or abundancy in Wiktionary, the free dictionary. Abundance may refer to: Abundance (economics), the opposite of scarcities Abundance (ecology)...- The abundance of the chemical elements is a measure of the occurrences of the chemical elements relative to all other elements...
The earth's crust is defined as the solid outer shell of the earth,and delimited fromthe top,the earth rigid surface,down deep to the Mohorovicic discontinuity.By such adefinition,the abundance of chemical elements in the crust is recalc... C Io - 《Acta Geological Sinica》 被引量: 31发...
EIGHTY–EIGHT chemical elements have been isolated. Their separation by chemical means is sometimes easy, sometimes very difficult, and the best available tests differ greatly in sensitivity. Spectroscopic analysis provides a test for all constituents at once; but these tests, too, are unequally ...