Though highly favoured N = 82 also strongly affects the relative abundances of even Z , even N isotopes, no comparable development precedes this neutron number. There is, however, a distinct relative abundance displacement at Z = 52 (tellurium) which appears to have significant consequences. ...
你好，relative abundance具有"相对多度,相对丰度,元素丰度"的意思。例句：Arachnida and Cecidomyidae had a higher relative abundance than other families being 0.3465 and 0.2309,respectively.蜘蛛类的相对丰盛度最高 （信息提供来自知米背单词）...
Atomic weight is the averagemassofatomsof anelement, calculated using the relative abundance ofisotopesin a naturally-occurring element. It is the weighted average of the masses of naturally-occurring isotopes. What Is It Based On? Prior to 1961, a unit of atomic weight was based on 1/16th ...
The term "relative" in RAM means "relative to the standard amu", not "relative abundance of isotopes", but the latter is relevant, in that anisotopehas an atomic mass, but anelementhas a relative atomic mass, as defined above. The RAM is fractional, not only because of the isotopic com...
Isotopic homogeneity of iron in the early solar nebula Studies of the relative abundance variations of three or more isotopes of an element can in principle determine if the initial reservoir of material was a... XK Zhu,Y Guo,RK O'Nions,... - 《Nature》 被引量: 274发表: 2001年 New W...
In stellar evolution theory, the fractional abundance of H by mass is known as X, that of He is known as Y, and that of all other elements are known as Z. In stars, the abundances are determined from the strengths of absorption lines in the spectrum combined with other parameters in ...
The relative abundance of tritiated-airborne species was studied for the air of the beam-line tunnel at high-energy accelerators as well as atmospheric a... T Miura,Y Oki,T Suzuki,... - 《Applied Radiation & Isotopes》 被引量: 0发表: 1993年 Dynamic Colloid?Water Partitioning of Pyrene th...
The relative atomic mass of an element is a weighted average of the masses of the atoms of the isotopes. It takes account of the abundance of each of the isotopes of the element. ... relative atomic masses are often rounded to the nearest whole number, but are actually not whole numbers...
The distance to the nearest breeding colony had a relatively high influence on shearwater abundance; the further away from colony areas the less likely it was to detect birds attending longliners (Tables 1 and 2). The number of hooks in each setting had a very low effect on the presence...
Metabolomics can play a particularly important role in elucidating novel anabolic and catabolic pathways in bacteria and fungi, and in understanding the dynamics of metabolism. In these approaches, an isotopically labelled substrate, with an artificially high abundance of isotopic label, is fed to the...