&&&绝对丰度
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The regressive equation is Y=0.9323X, with R
2=0.9911. We could measure the absolute abundance in water without introducing particles of standard concentration.
R2 =0 .9911,两者具有显著的相关性。 本测定方法可以在不加入标准浓度的微球时 ,直接应用于各类微型浮游生物在水体中的绝对丰度的测量。
Quantitatively micropaleontological and
stable isotopic analyses have been performed on Quaternary calcareous nannofossils from ODP site 1143 in the southern South China Sea. Changes in absolute abundance, accumulation rate and carbon isotopic record of nannofossils have been applied to understanding the Quaternary evolution of surface water paleoproductivity in the southern South China Sea.
通过对南海南部 ODP1143站第四纪沉积中超微化石分析 ,从绝对丰度和堆积速率、Florisphaera profunda百分含量及碳同位素三个方面探讨了该区第四纪表层海水古生产力的变化特征。
Compared(with) the Loess of the Loess Plateau,Xiashu Loess were significantly higher in REE absolute abundance,because of its higher(content) of clay that adsorbed REEs(especially LREEs).
下蜀黄土REE绝对丰度明显高于黄土高原黄土,这主要是由于下蜀黄土中粘粒组分含量较高,对REE特别是轻稀土元素(LREE)产生较强的吸附作用造成的。
This paper makes a systematic analysis and comparison of type structure, intensity effect,aggcomeration effect, intercity differences, absolute abundance degree, relative degree, gereral degree, spatial structure and theme function.
文章对长江三角洲城市旅游资源的类型结构、强度效应、聚集效应、城际差异、绝对丰度、相对丰度、总丰度、空间结构及其主题功能进行了系统分析与比较。
With pure 'Li_2CO_3 and 'Li_2CO_3, a calibrated mass spectrometric measurement of the isotopic ratio of lithium occurring in Zigong, Sichuan has been carried out. The absolute isotopic abundance was found to be 7.50 (±0.08) atom% 'Li and 92.50 (±0.08) atom% ~7Li. The atomic weight of lithium is 6.7.
本文自制纯~6Li_2CO_3并用纯~7Li_2CO_3,经校准质谱测量求得质谱计的质量歧视效应的校正因数,从而对我国自贡锂测得其同位素的绝对丰度为:7.50(±0.08)原子%~6Li和92.50(±0.08)原子%~7Li,而锂原子量为6.7。
Z is absolute abundances of a composition with constant abundance.
Z 是绝对丰度恒定的某一成分的绝对丰度。
Foreign reagents of silicic acid and alumina could be replaced by native ones for the very similar experimental results.
国产与进口试剂性能不影响吡咯类含氮化合物的绝对丰度与相对分布的分析结果，两步分离法具备分析试剂国产化的条件。
However, the small variance in the absolute concentration and isomer parameter values of neutral nitrogen compounds in oils from the subsection of Chang-8 oil layer of the Yanchang Formation indicates the short migration distance of the oils.
结果表明,原油的中性含氮化合物在平面和剖面方向均存在着明显的运移分馏效应,但是长8油层组原油中咔唑类化合物的绝对丰度和异构体参数值变化较小,说明该油层组油气经历了短距离运移。
Based on documents home and abroad about nitrogencontaining compound,this paper points out that nitrogen-containing compound has significant use in geochemical research.
在调研了国内外大量含氮化合物文献基础上,指出含氮化合物在油气地球化学研究中有着重要的应用价值,首先含氮化合物在研究油气运移方向及路径方面有独特作用,例如吡咯类中性氮化合物可作为一种示踪剂用于油气运移研究——随着运移距离的增长,原油中吡咯类化合物的绝对丰度会减小;
ABSOLUTE MEASUREMENT OF SAMARIUM ISOTOPIC ABUNDANCES
钐同位素丰度的绝对测量
Absolute Determination of Samarium Isotopic Abundance by Multiple-collector Inductively Coupled Plasma Mass Spectrometry
绝对质谱法测量钐同位素丰度
Absolnte Zero
CHEMICAL ELEMENT ABUNDANCES IN THE EARTH AND IT'S MAJOR SHELLS
化学元素的地球丰度
Nixida's “Absolutely None”
西田的“绝对无”
查询“绝对丰度”译词为用户自定义的双语例句&&&&我想查看译文中含有：的双语例句
为了更好的帮助您理解掌握查询词或其译词在地道英语中的实际用法，我们为您准备了出自英文原文的大量英语例句，供您参考。&&&&&&&&&&&& Bryozoans are strictly colonial filter feeders and mostly benthonic organisms. With the exception of a few species which are uncalcified and thus have no certain fossil record and which may survive in fresh water, all fossil bryozoans and most of their modern representatives are restricted within marine environments. The study of bryozoans in the past centuries shows their wide distribution in strata of different ages ranging from Ordovician to Quaternary at different localities of the world and their various... Bryozoans are strictly colonial filter feeders and mostly benthonic organisms. With the exception of a few species which are uncalcified and thus have no certain fossil record and which may survive in fresh water, all fossil bryozoans and most of their modern representatives are restricted within marine environments. The study of bryozoans in the past centuries shows their wide distribution in strata of different ages ranging from Ordovician to Quaternary at different localities of the world and their various colonial shapes (e. g., spheric, hemispheric, irregularly massive, reticulate, stem-shaped or tree-shaped, encrusting, etc.), geological occurrences (e. g., sporadic,patched, stratified or biohermal) and skeletal structures at different levels, which might provide us with some important biological and ecological information.Although bryozoans are cosmopolitan organisms, results of comprehensive study of their constituents, absolute abundance, relative abundance, diversity, equilibrium, trophic structure and the zooarial morphology of bryozoan faunas may be useful for interpreting the environments where they lived or once lived.Bryozoans as a group are eurybathic. They are reportedly found at depths covering the intertidal zone to 8300m (Ryland, 1970), and are especially abundant at depths between 20m and 80m (Dodd and Stanton, 1981). In general, the encrusting and erect, flexible forms are usually found in shallow water, while the erect, rigid forms sometimes may be found in somewhat deeper or less turbulent water. In marine environments, there are often identical genera but different species at different depths.Bryozoans also can tolerate wide ranges of temperature variation. The abundance and diversity of bryozoan faunas may be higher in both tropical and polar regions, but the relative abundance might be more or less different at different latitudes.Substrate seems to be a more important limiting factor than temperature and depth. Most bryozoans require a hard substrate for attachment, although many encrusting forms actually occur on a flexible organic substrate. Their ideal substrates for attachment include base rocks, rock debris, pebbles, shells, sea grasses, hydroid stems, wood, other bryozoan colonies, fragmentary or whole skeleton of other dead or living organisms. Unstable sandy or muddy substrate is not favorable for the reproduction and growth of the zooids. Correspondingly, in the geologic record they often cropped out in thin-bedded limestone intercalated with shale, shelly marl a but they are not common in sandstone and mudstone which show features of rapid sedimentation.Salinity also is one of the important factors which influence the distribution of bryozoans. The diversities of bryozoan faunas reach their climax at normal marine salinity. It is reported that there are 30—40 or even more species in one valve of moulluscan shell under normal marine environments. In case the salinity is less than 20％ or more than 45‰, the diversity of bryozoan faunas would considerably decrease.Turbidity and turbulence of water also affect the growth and reproduction of zooids. Clean, slightly to moderately turbulent water is reported to be a favorite environment for the bryozoans. Generally speaking, encrusting and massive forms seem to be more common in somewhat turbulent water, while delicately-branched, pinnate, fenestrate forms are often found in cleaner and less turbulent water. Since light controls the distribution of planktons on which the bryozoans feed, the distribution of bryozoans is affected indirectly by light. This phenomenon is especially apparent in tropical regions.Different faunas often occur together with bryozoans in different ages. In the Paleozoic (mainly Late Paleozoic), some brachiopods, crinoids, small solitary corals and molluscs may occupy similar or identical habitat of bryozoans, whereas in the Mesozoic and Cenozoic, bryozoans are often found in faunas consisting of molluscs, algae and some serpulids.What is mentioned above is only abrief account of the ecology and本文概述了苔藓虫的生态分布特征,综述了水体深度、温度、盐度、底质、浊度、扰动强度、光照、伴生生物对苔藓虫的限制作用,并以早二叠世和晚第三纪苔藓虫动物群为例,说明通过对苔藓虫组合的组成、相对丰度、绝对丰度、分异度、均衡度、营养结构、空间结构、硬体形态以及伴生沉积物的沉积及地球化学特征的综合研究,可以提供可靠的生态学信息。 Pearce Diagrams,presented by Pearce,T.H.in 1968,can be used in modelling geological data.These diagrams are A/Z—B/Z plots,on which A and B are composi- tional abundances or complex linear combinations,Z is absolute abundances of a composition with constant abundance.Pearce Diagrams can be per- fetcly used in studying cogenesis,origin and variation of igneous rocks etc.,especially in fractional crystallization of magma.The paper comprehensively summarized the usage of Pearce Diagrams in studying... Pearce Diagrams,presented by Pearce,T.H.in 1968,can be used in modelling geological data.These diagrams are A/Z—B/Z plots,on which A and B are composi- tional abundances or complex linear combinations,Z is absolute abundances of a composition with constant abundance.Pearce Diagrams can be per- fetcly used in studying cogenesis,origin and variation of igneous rocks etc.,especially in fractional crystallization of magma.The paper comprehensively summarized the usage of Pearce Diagrams in studying igneous rocks and the choice of parameters A, B and Z,and developed a new interpreting method of A/Z vs B/Z trends on Pearce Diagrams based on the studies of predecessors.Pearce 图解是 Pearce,T.H.(1968)提出的用来模拟地球化学数据的图解。这些图解是 A/Z—B/Z 投影图,其中 A、B 代表成分丰度或其复杂的线性组合,甚至可以是 CIPW 标准矿物含量;Z 是绝对丰度恒定的某一成分的绝对丰度。Pearce 图解在研究岩浆岩同源性、岩浆岩的成因和演化等方面,尤其是在研究岩浆的分离结晶作用中有其独到之处。本文全面总结了 Pearce 图解在岩浆岩研究中的应用以及参数 A、B、Z 的选择等问题,并在前人研究的基础上,对 Pearce 图解中 A/Z 和 B/Z 投影点趋势解释等问题提出了新的解释方法,推广了这一图解的应用。 With pure 'Li_2CO_3 and 'Li_2CO_3, a calibrated mass spectrometric measurement of the isotopic ratio of lithium occurring in Zigong, Sichuan has been carried out. The absolute isotopic abundance was found to be 7.50 (±0.08) atom% 'Li and 92.50 (±0.08) atom% ~7Li. The atomic weight of lithium is 6.7. 本文自制纯~6Li_2CO_3并用纯~7Li_2CO_3,经校准质谱测量求得质谱计的质量歧视效应的校正因数,从而对我国自贡锂测得其同位素的绝对丰度为:7.50(±0.08)原子%~6Li和92.50(±0.08)原子%~7Li,而锂原子量为6.7。&nbsp&&&&&相关查询
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质谱图中的相对丰度表示的是什么意思
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又称同位素丰度比(isotopic abundance ratio).同位素分离理论中常采用来表示轻组分的含量.通常用符号R表示.定义为气体中轻组分的丰度C与其余组分丰度之和的比值.其表达式是R≡C/(1-C).也可为质谱图中相对于基峰的离子峰度(从峰高计).
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相对丰度：以质谱中基峰（最强峰）的高度为100%，其余峰按与基峰的比例加以表示的峰强度为相对丰度，又称相对强度。
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同位素丰度
isotopic abundance又称同位素相对丰度。自然界中存在的某一元素的各种的相对含量（以原子百分计）。地球上元素的同位素丰度只是指它们在中的含量，如的同位素：1H=99.985%，D=0.015%；的同位素丰度：16O=99.76%，17O=0.04%，18O=0.20%。[1]
同位素丰度名称
isotopic abundance
又称同位素相对丰度。
同位素丰度简介
自然界中存在的某一元素的各种的相对含量(以原子百分计)。
地球上元素的同位素丰度只是指它们在中的含量，如的同位素：1H=99.985%，D=0.015%；的同位素丰度：16O=99.76%，17O=0.04%，18O=0.20%。
同位素丰度有和绝对丰度之分。绝对丰度：指某一种同位素在所有总量中的相对份额，常以该同位素与1H(取1H=1012)或28Si(28Si=106)的比值表示。这种一般是由和陨石的实测结果给出，结合各元素的同位素的组成计算的。
：指同一元素各同位素的相对含量。如12C=98.90%。
某元素的同位素丰度一般是固定的，可是用非常准确的同位素分析法发现，元素的同位素丰度因来源不同而有某些出入，通常有一个暂定的平均值。如10B的为20.316%～19.098%，暂定平均值为20.0%。这种差异对轻元素较为明显。
同位素丰度规律
同位素丰度有以下规律：
①在27号以前的元素中，往往有一种同位素的占绝对优势。如14N为99.64%,15N为0.36%。大于27号的元素同位素的丰度趋向于平均，如锡的10种天然同位素中丰度最大的是120Sn，为32.4%。
②原子序数为偶数的元素中，往往是偶数同位素的丰度大。如硫的天然同位素中，32S的丰度为95.02%。[2]
．第9 章同位素丰度改变化合物（ Isotopically modified ... - 有机化学．[引用日期]
．同位素丰度．[引用日期]
中国核学会于1980年正式成...
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