双二倍性

Wheat germplasm lines were obtained from the posterity of Aegilops tauschii-Triticum Carthlicum amphiploid, and analysis results showed that the 30 germplasm lines have many excellent characters, such as multi-tillers, multi-spikes per plant, good disease resistance, large ear, etc., they are very useful in genetic improvemert of wheat.

从粗山羊草与硬粒小麦合成的双二倍体后代中选育出30个种质系，对其鉴定结果表明，它们的分蘖力、单株穗数、抗病性、穗长等性状表现优异，具有重要利用价值。

Fig 1 The results of two color FISH A:Normal sperms(a sperm nucleus with a red fluorescence domain was X sperm, and with a green fluorescence domian was Y sperm);B:Numeric chromosome abnormal sperm two green fluorescence domains within the same sperm nucleus which may be classified in Y disomic sperm or diploidy sperm, in the case of hybridization with two probes, one euchromosome specific and the other sex chromosome specific, this sperm could be discriminated as disomic or diploidy sperm

图1 双色荧光原位杂交结果 A：正常精子(精子头部有1个红色荧光信号者为X精子，有1个绿色荧光信号者为Y精子)；B：染色体数目异常精子两个绿色荧光信号同在1个精子核内，可为Y双体精子或二倍体精子，若用1条常染色体探针和1条性染色体探针进行双色荧光原位杂交，可以区别该精子属Y双体精子或二倍体精子

We coupled the IgG of monoclonal antibody N34 specific to UK and the Fab of monoclonal antibody SZ-51 specific to the membrane protein GMP-140 of activated platelet. The bispecific antibody (N34 SZ-51) is able to bind UK and plasma-clot simutaneously. It enhanced plasma clot lysis 5 fold by HUK whereas it enhanced plasma clot lysis 38 times by LUK. UK in association with the bispecific antibody didn't decrease the concentration of fibrinogen in the assay supernatants.

利用抗体介导使纤溶酶原激活剂定向到血栓表面，可大大提高其纤溶作用，我们用双功能团试剂将抗尿激酶的单克隆抗体N34的IgG和抗活化血小板膜蛋白GMP-l40的单抗SZ-5l的Fab片段通过二硫键共价偶联，合成的双专一性抗体（N34-SZ-51）既具有血栓亲和性也具有尿激酶亲和性，从而增加了尿激酶对血栓的专一性，使高分子量尿激酶溶栓率提高了5倍，使低分子量尿激酶溶栓率提高了38倍之多，且不影响血浆中纤维蛋白原的含量。

There was big difference among the 22 different materials in the disease resistance. Translocation lines Pm97033 showed the highest resistance in reaction than others. The percentage of diseased root and severed level were 11.3% and 5.4%; substitution lines Wan7107 showed medium resistance to the fungus, the percentage of diseased root and severity level were 21.4% and 10.6%; F5 generation of common wheat with Till showed higher resistance to take-all fungus than the PS progenies of common wheat with Aegilops tauschii or the other common wheat varieties.

菌饼＋菌粒法对宁春4号的致病力明显高于菌饼法和菌粒法，其病根率、严重度和病茎率分别达到100.0%，57.3%和28.6%。22个遗传背景不同的小麦材料间抗病性差异较大，其中小麦－簇毛麦易位系Pm97033的抗病性最强，病根率和严重度分别为11.3%和5.4%；代换系Wan7107次之，病根率和严重度分别为21.4%和10.6%；硬粒小麦－簇毛麦双二倍体(TH1)与普通小麦品种杂交后代的抗病性强于粗山羊草与普通小麦品种杂交后代。

DNA C-values might be one of important indices in the evaluation of angiospermous invasiveness. To test this viewpoint, we compared DNA 1C-values and basic genome sizes in 3,676 angiosperms. The results suggest that:(1) the two nuclear values vary greatly among different groups, e.g., significantly higher in herbs than in trees, in monocots than in dicots, in perennials than in non-perennials;(2) the two nuclear values both have significant effects on plant invasiveness, especially in herbs, dicots, monocots, perennials, non-perennials, diploids, polyploids, Compositae, and Poaceae, while not significant in trees and Fabaceae.

DNA C值与被子植物入侵性密切相关，为考察应用DNA C值评估被子植物入侵性的可靠性和局限性，我们统计分析了全世界范围内3676种被子植物的DNA 1C值（配子未发生DNA复制时的染色体DNA含量）及基因组大小（单个染色体组的DNA 含量），结果表明：1）DNA 1C值和基因组大小在被子植物不同类群中差异极大，例如在草本植物中显著高于木本植物，单子叶植物显著高于双子叶植物，多年生植物显著高于非多年生植物；2）两项指标都与被子植物入侵性显著负相关，尤其是在草本植物、双子叶植物、单子叶植物、多年生植物、非多年生植物、二倍体、多倍体、菊科和禾本科中，然而在木本植物、豆科植物中其与植物入侵性无显著关系。

The UV and IR spectroscopic studies of the monomer films showed that the photoreaction ratio of monomer (about 50%) was higher than the corresponding photosensitive polymer (about 10%, PVCi). The polarized IR spectra proved that obvious anisotropic absorption was displayed in the irradiated photosensitive film. With polarizing microscopy method, we found that these kinds of photoalignment films exhibited good alignment ability, and the stability of the photoalignment film could reach about 100℃. 2 A photosensitive self-assembled monolayer was fabricated that contained photo-cycloadditable groups, such as, coumarin and cinnamate. The reaction process were detected by contact angle method because the IR absorption of monolayer was very weak. The photosensitive self-assembled monolayer promote uniform alignment of nematic liquid crystals by LPUV, and it thermal stability could reach about 130℃. 3 A cationic bolaform amphiphiles was synthesized that had two photosensitive double bonds, and can be polymerized by ultraviolet. A layer-by-layer self-assembled deposition film was prepared in aqueous solution by using this material and poly (sodium 4-styrenesulfonate). The UV-Vis. spectra proved that the multilayers film was uniform and layer-by-layer. When LPUV irradiated the film, the photopolymerizable double bond underwent [2+2] cycloaddition, and the production of the reaction distributed along the polarized direction of incident LPUV. Polarized UV-Vis. spectra indicated that the irradiated self-assembled multiplayer film was anisotropic, and the dichromic ration is about 0.09, it is higher than the spin-coating method of photosensitive polymer or monomer. We used this anisotropic film as alignment layer of nematic liquid crystals, and obtained a uniform and stability alignment result, the static contrast ratio is about 100, which is very close to application of liquid crystal device. This thesis is an instance that the photochemical material was used in the physics region of liquid crystals, the route that was from photosensitive monomer, self-assembled monolayer film to self-assembled multiplayer film was undergone, by this logical research method photoailgnment of liquid crystal was extended and consummated.

围绕上述思路开展了如下工作：1合成了三种可进行光二聚反应的光敏小分子单体，LPUV 辐照制作了光控取向膜；用紫外-可见光谱法和红外光谱法分析了薄膜中的光化学反应，发现小分子的光反应程度可达到50%以上，至少比光敏高分子高出5倍；薄膜的偏振红外光谱证实，经过LPUV 辐照后薄膜出现了明显的各向异性；将小分子光控取向膜制成液晶器件，在偏光显微镜下观察看到均匀一致的液晶取向；并且热稳定性达到100℃左右，接近实用化要求。2制备了含肉桂酸、香豆素基团的自组装单层膜；采用接触角的方法监测自组装反应的动力学过程；紫外-可见光谱证实了自组装单层膜在石英基板表面形成；自组装单层膜经LPUV 辐照后能诱导液晶均匀取向，而且热稳定性可达130℃，热稳定性进一步提高。3合成了含有光敏双键的双季铵盐，在水溶液状态下将它和聚乙烯基苯磺酸钠沉积生成layer-by-layer 自组装多层膜，紫外-可见光谱证实这是一个逐层均匀的沉积；在LPUV 照射下，自组装膜中的光敏双键按照偏振方向发生[2+2]环加成反应，形成取向膜，用二向色性值评价的分子取向度高于高分子及小分子光控取向膜的水平；实验证明用自组装多层膜制成的液晶器件亮暗态均匀，静态对比度约为100，达到实用化器件的水平。

In order to analyze the conservation of maize centromeric satellite DNA and centromeric retrotransposon in the subspecies and relatives of Zea mays, dual fluorescence in situ hybridization was used to detect the existence and distribution of the above two repetitive sequences in Zea mays ssp. mexicana, Z. diploperennis, Z. perennis, Tripsacum dactyloides, Coix lacryma-jobi, and Sorghum bicolor.

为分析玉米着丝粒卫星DNA和着丝粒反转录转座子在玉米种的亚种及近缘种中的保守性，采用双色荧光原位杂交检测了这两种重复序列在墨西哥玉米、二倍体多年生类玉米、多年生类玉米、摩擦禾、薏苡、高粱中的存在和分布。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐