分子分离

TheMn complexes with internal quaternary ammonium and/or pyridinium salt, either formed in-situ or isolated, displayedsignificantly higher activities than analogous complexes and Jacobsens catalyst in theaforementioned reaction.

通过研究发现，含有分子内季铵盐和／或吡啶盐的手性吡咯烷Mn配合物，无论是原位生成的还是分离的，都比类似的配合物以及Jacobsen催化剂的活性明显高。

It reversibly binds oxygen, is soluble in water, and is made from polymer units that are known to be safe in the body.

这种分子可与氧气结合、分离，可溶于水，由高分子单元合成，据了解在人体内具有安全性。

Disclosure is a method of separately recovering deoxyribonucleic acid and ribonucleic acid from a biological sample solution.

本发明涉及把生物试样中含有的脱氧核糖核酸和核糖核酸分子，从同一试样中简便且安全地分别分离及回收的方法及装置。

The physical maps of mtDNAs from N.taihuensis Chen,Salvelinus taxa and Salmo salar were analyzed.Genetic distances between mtDNAs were calculated by the formula of Nei and Li(1979).Phylogenetic reconstruction method,UPGMA,was used to analyze the genetic relationships and the molecular dendrogram was established and revealed:the genetic distance between Salvelinus taxa and Salmo salar is 12.23% and that between N.taihuensis Chen and Salvelinus taxa-S.salar is 21.36%.Thisc indicates that Salangidae diverged from Salmoninae earlier.

比较了鲑形目3种鱼的线粒体DNA物理图谱，根据限制性位点差异法计算它们之间的遗传距离，利用UPGMA聚类分析法构建分子聚类图，结果表明：红点鲑属与大西洋鲑先聚在一起，再与太湖新银鱼相聚，前两者间遗传距离为12.33%，亲缘关系较近，太湖新银鱼与这两者间的遗传距离为21.36%，亲缘关系较远，表明银鱼科与鲑科分离较早。

The basis for membrane separations is the difference in permeability of a semiporous membrane to different molecular sizes .

膜分离技术的基础是不同大小的分子对半渗透膜渗透性不同。

Abstract〕 Objective To research the effects of plasma on expression of erythrocyte CD55 molecules by means of natural and separative experimental system.

目的：用自然与分离实验体系探讨血浆对红细胞 CD55 分子表达的影响规律。

Evidence from seed-coat micromorphological features supports placement of Ripogonum outside Smilacaceae and inclusion of Heterosmilax in Smilax, which are also consistent with palynological and molecular evidence. Within Smilax, seed-coat micromorphological features suggest close relationships between most of the species of sect.

种皮形态分析结果支持将Ripogonum属从菝葜科中分离、独立成科，支持将肖菝葜属与菝葜属合并的观点，这与孢粉学和分子证据的分析结果一致；推测肖菝葜属和菝葜属的土茯苓组sect。

Sarsolenone, a novel diterpenoid with [9. 3. 1] carbon skeleton, was isolated from the marine Sarcophyton solidum Tixier-Durivault in South China sea.

Sarsolenone是从我国南海软珊瑚(Sarcophyton solidum Tixier-Durivault)中分离出来的一种结构独特的二萜类化合物，分子基本骨架为[9.3.1]桥环双环结构。

In the present study, we applied water-insoluble nickel oxide and nickel subsulfide to induce morphological transformation of human embryonic lung cells and to probe the differentially expressed genes related to the transformation.

因此本研究试图用两种水不溶性镍化合物诱发人胚肺细胞的恶性转化模型，并分离、克隆与之相关的差异表达基因，为深入研究镍致癌的分子机理提供初步的资料。

Results Based on morphological characteristics, biological characteristics and phylogenetic evidences, we studied the taxonomy of the strain YY0801 isolated from Phytomia zonata (Diptera: Syrphidae).

从黄道蚜蝇昆虫体内分离到螺原体YY0801，并对其进行了形态学、基本生物学及分子生物学特性研究。

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。