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Litsea citrata oil can be divided into citral,light and heavy fractions. Curves of liquid-gas equilibriums, relating to the citral-heavy system and citral-light system,in vacuum and steam were obtained respectively by equilibrium experiments.

基于山苍子油具有可分成轻组分、柠檬醛组分和重组分三个部分的特性，在真空和水蒸气系统中，分别对柠檬醛-轻组分体系和重组分-柠檬醛体系进行平衡实验，得到两个体系的汽液相平衡组成和相平衡曲线。

Five oil fractions of petroleum ether extract from Mahonia duclouxiana Gagnep.

通过硅胶柱层析从长柱十大功劳Mahonia duclouxiana Gagnep。

Influences of types of modificator s and their added volume fractions on the structure and properties of The medium-chromium cast iron under the same experiment condition were investigated in this article.

探讨了在相同试验条件下，变质剂种类及其加入量对中铬铸铁组织和性能的影响。

The hydrophobic and hydrophilic organic fractions each accounted for about 50% of DOC of the secondary effluent samples. Hydrophobic acids were the largest group accounting for 42%, followed by hydrophilic acids and non-acid hydrophilic matters at 26% and 24%, respectively; nonacid hydrophobic matters at 8% were the smallest group.

实验结果表明：当生化出水中有机物浓度以DOC表征时，水中硫水性物质与亲水性物质各占50%，其中疏水酸浓度最高，约为42%，其次为亲水酸和非酸亲水物质，分别占25%和24%，非酸疏水物质仅为8%。

Based on the fact that noΔM,ΔMM orΔGM fractions were separated,we postulated that the hydrolysis mainly occurred between two guluronic acids making one guluronic acid residue on the reducing end and an unsaturated guluronic acid in the nonreducing end.

根据以上实验结果推测裂解位点位于两个古罗糖醛酸之间，使得一个古罗糖醛酸变成不饱和糖醛酸位于产物的非还原末端，而另一个古罗糖醛酸位于产物的还原末端。

In general, sunflower was suited to phytoremediation of moderately Pb-contaminated soil by phytoextraction.The result mentioned above showed that the main reasons that nutrient and EDTA could impact on phytoremediation efficiency was these as below: firstly, the addition of soil amendments transform soil Pb from nonresidual fractions to residual fraction substantially. Secondly, the grown period of tissues in C4 plants was short, so the replacement of C4 plants with C3 plants may increase times and efficiency of remediation.

根据上述结果，不同营养水平和EDTA对铅污染土壤植物修复的机理及效率可以归纳为：N、P、K的添加能使土壤中的非残留态Pb向残留态转化，因此N、P、K的添加能够增加菠菜和苣荬菜体内的铅积累；与C3型植物菠菜、苣荬菜相比，C4型的植物马齿苋由于构件成熟期短，较为适合作短期内铅污染土壤修复工程；在植物修复过程中，低浓度EDTA的分次添加能够显著提高修复的效率，并且能够减小螯合剂增加产生的二次污染。

The neutralizing activity of these antibodies and IgG fractions is acquired through post-translational modifications, through opsonization of virus particles into macrophages and immature dendritic cells, or through expression of antibodies on the surface of HIV-1-susceptible cells.

这些抗体或IgG片段的中和活性可以通过抗体分子翻译后的修饰，或介导巨噬细胞和未成熟树突状细胞的对病毒颗粒的调理作用，或者通过表达在HIV易感细胞表面来体现。

The experimental results of geochemical speciation in the soils show that more than 85% of 7Be, 137 Cs, 226 Ra and 228 Ra are bound to organic matter, Fe Mn oxy hydroxide and residual fractions.

岩溶山区表土中7Be、137Cs、226Ra和228Ra地球化学相分配的实验研究表明，4种核素绝大部分（85％以上）存在于FeMn氧化物、有机质及残渣相中。

Shanxi Yangling 712100, ChinaAbstract Screening of the effective anti-tumor fractions from acetic ester fraction and water fraction as well as alkaloids fraction and non-alkaloids fraction of Oxytropis Kansuensis on mice bearing S180 and H22 in vivo.

以甘肃棘豆提取物的乙酸乙酯部位、水相部位，以及生物碱和非生物碱部位，对荷S180和H22肿瘤小鼠进行了体内抗肿瘤实验。

The effects of the presence of palmitic acid and glycerin, in varying mass fractions on the oxygen and water vapor permeability of corn starch based edible coatings were examined.

研究了添加不同量软脂酸和甘油对淀粉基可食膜的水蒸气透过率和氧气透过率的影响，并用于番茄果实的保鲜试验。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。