同位素分馏

因此，有关同位素分馏方面的定量描述及应用工作，应该以Cramer模型III为基础。

Therefore , quantitative description and application concerning isotope fractionation should be based on the Cramer model III.

氧的非质量同位素分馏还将在（古）大气臭氧活性、火山喷发柱化学和O、S、N生物地球化学循环等研究中发挥更大作用。

This demonstrates that mass-independent oxygen isotope fractionation will play a more important role in the research on ( ancient ) atmospheric ozone activity , chemistry in volcanic plumes and O , S and N biogeochemical cycle .

烟草叶中异构和反异构烷烃的成因及其光合作用C同位素分馏效应

Origin and biosynthetic effects on the stable carbon isotopic compositions of 3-methyl and 2-methyl alkanes in tobacco leaves

影响Fe同位素分馏的因素主要有生物有机作用和无机作用两种方式。

Fractionation of Fe isotopes is controlled by biological and inorganic processes .

造成自然界B的同位素分馏的主要原因在于流体&固体反应体系的pH条件和水／岩比值变化。

Boron isotopic fractionation mostly results from the pH and water / rock ratio change in the fluid-rock interaction system .

植物营养元素的含量和δ~（13）C值随海拔而变化的特征及营养元素相互作用对碳同位素分馏作用的影响

Altitudinal variations of nutrient concentrations and carbon isotope compositions in a c_3 plant and the effects of nutrient interactions on carbon isotope discrimination in limestone areas of Southwest China

质谱测定过程中，涂样溶液最佳的pH值范围为2～7，如果涂样溶液的pH值超出这个范围，就会引起较大的氯同位素分馏。

The best pH range of loading solution was 2 ~ 7 . If the pH value of loading solution was beyond the range , the observed fractionation of chlorine isotope would appear .

生物气CO2和CH4之间的碳同位素分馏系数αc>1.055，具有CO2还原途径成气的特征。

The fractionation coefficients (α c ) of the CH4 and CO2 of the biogenic gases are more than 1 . 055 , characteristic of the CO2 reduction pathway .

上述Re-Os同位素分馏校正方法将改善用ICP-MS进行Re-Os定年时的精密度和准确度。

The correction method for Re-Os isotope fractionation presented by this paper will improve the precision and accuracy of the Re-Os dating by using ICP-MS.

用蒸发实验研究了浓度为10-6级的硼在水和稀HCl溶液蒸发时的挥发度、同位素分馏和甘露醇的影响。

Evaporation experiments were undertaken to determine the volatility of levels of ppm concentration of boron in water and dilute HCl in the presence and absence of equimolar mannitol and / or cesium .

根据岩浆来源CO2和CH4之间的碳同位素分馏值计算，目前该区深部岩浆热源的温度应高于514℃。

And now , the temperature of mantle derived magma intrusion should be higher than 514 ℃ according to the carbon isotopic fractionation between the mantle derived CO 2 and CH 4 escaped from the deep reservoir .

相反，低生产力阶段Ca同位素分馏作用弱，海水中44Ca相对降低，记录在有孔虫壳体中的4δ4Ca值呈低值。

Contrarily , during the low productivity , calcium isotope plays a weak role in isotopic distillation , resulting in a decrease of ~ ( 44 ) Ca in sea water and a low value of δ ~ ( 44 ) Ca in creatural shell .

本文拟合的硅酸盐熔体-水体系氢同位素分馏等值线在P-T空间的形态变化特征与矿物-水体系存在较大差异。

The contours of hydrogen isotope fractionation between silicate melts and water are constructed in P - T space , which are apparently different from those for brucite - water system .

沉水植物光合作用中碳同位素分馏的分析表明，沉水植物的δ13C值同水中溶解无机碳的浓度有关，从而与影响其改变的各种因素相关。

According to the model of stable carbon isotopic fractionation in submerged plant , the concentration of dissolved inorganic carbon ( DIC ) is an important environmental factor influencing the δ 13C of submerged plants .

依据流纹岩熔体与水之间氢同位素分馏的压力效应，成功地模拟了美国西部GlassCreek流纹岩δD值和水含量变化规律与岩浆去气之间的关系。

In terms of pressure effect on hydrogen isotope fractionation in the rhyolitic melt - water system , the unusual variability in the δ D values and H2O contents of the Glass Creek rhyolites from western United States are successfully modeled in the course of magmatic degassing .

水岩作用中硼同位素分馏与硅化交代强度成正相关关系，并且是硅置换11B，造成岩石亏损11B，而呈现低的δ11B值；

Boron isotope fractionation is positive to the silicification intensity and the deficit of 11 B may be resulted from replacement 11 B by Si during the water rock reaction ;

与H2O平衡以后的[CO3]2-与Ca2+]结合生成文石，此过程体现矿物形成过程中氧同位素分馏的结构效应。

The second step is the combination of Ca 2 + with the [ CO 3 ] 2 - equilibrated with water to form aragonite , which bears oxygen isotope fractionation due to the structural effect when forming aragonite crystal .

26个大豆基因型和18个小麦基因型的叶片和种子的稳定碳同位素分馏值（△13C）在正常供水和缺水的田间条件下皆有明显的基因型差别。

Significant differences of carbon isotope discrimination ( △ 13 C ) in leaves and seeds among 26 genotypes of soybean and 18 genotypes of wheat with varying drought resistance were observed both under wet or dry field soil condition .

植被枯落物成为表土层有机质以及表土层被埋藏后的有机质更新过程，均存在碳同位素分馏效应，有机质δ13C显著增大。

The fractionation of carbon isotope was happened during both the transformation of vegetation debris into topsoil organic matter ( OM ) and its regeneration after the topsoil buried , which resulted in a significant increase of SOM δ 13 C.

湖水与沉积物间的同位素分馏因素α＝1.009±0.002，来源水的δ￣6Li值变化范围为＋6.1‰－－28.6‰，由它们的来源所决定。

The apparent isotopic fractionation factor between brine and lake sediments is 1.009 ± 0.002 . The δ 6Li value of source water ranges from + 6.1 ‰ to-28.60 ‰, depending on their origin .

由于明显的同位素分馏和不同地质体中截然不同的δ7Li值，锂同位素应用十分广泛，且在壳-幔演化、陆壳风化、卤水和污染水体示踪等研究领域取得显著成效。

Larger isotope fractionation and different lithium isotopic values in geological reservoirs make Li find extensive applications in environmental geochemistry , such as upper continental crust weathering , brine and polluted water tracing , etc.

在400℃以上的高温条件下，云母－水体系的氧同位素分馏与温度之间的相关性不明显，并且云母相对于水亏损18O达1‰－2.5‰。

At temperature above 400 ℃, the dependence of isotopic fractionation between mica and water on temperature is not significant , and mica tends to be depleted in 18O ( up to 1 ‰ - 2.5 ‰) relative to water .

综述了点特异性天然同位素分馏核磁共振技术（SNIF-NMR）的原理、发展历程以及在葡萄酒质量评价中的应用。

The operation mechanism and development process of SNIF-NMR were summarized in this paper . Besides , its application in grape wine quality evaluation was introduced .

对于有机碳含量较高的有机碳标准物质、植物和现代土壤样品，在850℃氧化条件下，恒温2.5h，足以保证样品有机质氧化完全，不会产生同位素分馏；

For those samples with high organic matter contents , such as pure organic standard samples , plants and modern soil , samples can be oxidized completely and no isotope fractionation occur when they are oxidized for 2.5 hours at temperature of 850 ℃ .

砷浓度与δ98Mo比值呈现出弱正相关，表明铁的还原溶解导致砷为释放到地下水中，而钼同位素分馏可以作为此过程的间接指示。

Arsenic concentration was found weakly positively correlated with δ 98Mo ratio in Datong Basin , indicating that large Mo fractionation resulted from reductive dissolution of Fe oxyhydroxides could be used as a signal of As release into groundwater .

煤成甲烷碳同位素分馏的动力学模拟

Kinetic modeling of carbon isotope fractionation of coal - derived methane

石英锡石水体系氧同位素分馏作用实验研究

Experimental Studies of Oxygen Isotope Fractionation between Quartz-Cassiterite and Water

氧的非质量同位素分馏及其地学应用

Mass-Independent Oxygen Isotope Fractionation and Its Application to Earth Sciences

常见稀土氧化物矿物中氧同位素分馏研究

Study on Oxygen Isotope Fractionation in Common RE Oxide Minerals

海洋天然气水合物氢氧同位素分馏初探

Hydrogen and oxygen isotopic fractionation of gas hydrate formation : Experimental study