多价的

Resistant accessions, genetic basis, biochemical research and molecular marker are summarized in this article. We also discussed how to apply allelism test which using hybridize and molecular marker in different resistance materials in order to make a good use of resistant resources and provide useful information in the further research of the multiresistant mungbean breeding.

本文就绿豆抗豆象基因资源的发掘与利用及抗豆象特性的遗传机理与分离规律进行了总结与分析，对抗豆象的生化基础研究和分子标记进行了综述，探讨了抗豆象育种的重要性及尚需解决的问题，提出进行不同抗源的基因等位性鉴定、高效地利用抗源、培育多价抗豆象绿豆品种的重要性。

In this article, the latest progress in the study of DNA condensation in vitro induced by multivalent cations is reviewed covering the mechanism, process, influencing factors of DNA condensation and its recent applications in gene transfection.

本文综述了近十几年来以多价阳离子为缩合剂诱发的DNA体外缩合的研究进展，着重介绍了缩合的机理、过程、影响缩合的因素以及应用于转基因的最新成果。

In the second part of this dissertation, the theory of multivalent carbohydrate ligands binding to the lectins located on cell surface was used in the experimental design.

论文的第二部分主要是运用多价糖配体与细胞表面凝集素专一识别、结合的原理，设计和合成了与星状细胞表面M6P/IGF-Ⅱ受体具有特异性识别的六磷酸甘露糖修饰的人血清白蛋白（M6P-HSA），作为导向药物的载体。

The acidic composition can be prepared by mixing a monovalent or polyvalent cation and an organic acid in the presence of a strong oxyacid, wherein the resultant acidic composition is less corrosive to a ferrous metal than a solution of a mineral acid having the same acidic pH value as that of the acidic composition, and where in the acid composition is more biocidal than a mixture of the organic acid and a metal salt of the organic acid which mixture has the same acid normality value as that of the acidic composition.

所述酸性组合物可以在一种强羟基酸存在时，通过混合单价或多价阳离子和有机酸来制备，其中与具有相同的酸性pH值的无机酸溶液相比，所形成的酸性组合物对含铁金属的腐蚀性更小，并且与具有相同酸当量值的有机酸与有机酸金属盐的混合物相比，所述的酸组合物具有更强的杀生物作用。

The protective efficacy of the fusion DNA vaccines was surpass the polyvalent DNA vaccines and equivalent to that of the BCG vaccine, suggesting that fusion DNA vaccines represent a promising approach for the prevention of BT. So our experiment may be useful for the development of Bovis tuberculosis vaccine.

从攻毒保护效果来看，融合DNA疫苗组的保护效果明显优于多价DNA疫苗，达到了BCG疫苗的免疫保护水平，表明本研究制备的融合DNA疫苗具有良好的用前景，从而为牛结核病新型疫苗的研究奠定了基础。

The results showed that: at metaphase I, the homoeologous chromosome pairing among different F1 hybrids ranged from 2.0 to 11.4 bi-valents formed by homoeologous chromosomes per pollen mother cell, and very few multivalents, and even very few bivalents were formed by two chromosomes within one genome rather than homoeologous chromosomes in some PMCs; at anaphase I, all biva-lents were disjoined and most univalents were divided.

结果表明在中期I阶段，这些杂种一代的近缘染色体联会变化很大，每个花粉母细胞中二价体形成的数目从平均2个到11.4个不等，甚至在某些花粉母细胞中，还发现极少的多价体和非部分同源染色体所形成的单基因组内二价体；在后期I时，所有的二价体分离，同时多数单价体也分离，分离的二价体和分离的单价体都移向两极，从而形成两组染色体；因为这时完整花粉母细胞中分离的二价体在两组染色体中总是对应出现，从而根据半二价体上染色体重组的位置可以分析在二价体的四分体时期发生在非姊妹染色体之间的多种染色体交换类型，如单交换、三线双交换、四线双交换、四线三交换和四线多交换。

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。