四体的

The structure and expression pattern of each storage protein was investigated using one-dimensional SDS-PAGE. Our results showed that the protein content of each fraction in endosperm of autotetraploid rice line is mostly higher than that of its corresponding diploid rice line.

结果表明：同源四倍体水稻胚乳蛋白各组分含量与相应的二倍体相比，大部分呈增加趋势；同源四倍体水稻胚乳蛋白的亚基类型与相应的二倍体水稻基本一致，仅在全蛋白电泳和清、球蛋白电泳中各发现1条差异条带。

The research of matrixes is continuously an important aspect of the quaternion division algebra. The purpose of this paper is to discuss the property of skew self-conjugate matrix. The definition of skew self-conjugate matrix on real quaternion division algebra is given.

四元数体上矩阵的研究是四元数代数理论中的一个重要方面，本文研究实四元数体上斜自共轭矩阵的性质，给出实四元数体上斜自共轭矩阵的定义。

Compared diploid fodder beet with tetraploid fodder beet, tetraploid plants put up characteristics of bigger and thicker dark green leaf, more folds on leaf, stronger footstalk and so on .we can take those characters as the advancing index in testing tetraploid fodder beet.

饲用甜菜四倍体植株与二倍体植株相比，表现出叶片增大变厚，叶色浓绿，叶面多皱褶，叶柄粗壮等特点，可以将这些特点作为饲用甜菜四倍体田间初步筛选的指标。

With the stable genetic tetraploidy and the fertility in the nature environments, this allotetraploid population presented the key factors to form a new species with 200 chromosomes.

异源四倍体鲫鲤稳定的染色体数目和正常的性腺结构以及自然条件下的生殖传代行为，说明该异源四倍体鲫鲤已成为一个染色体数目为4n=200、遗传性状稳定的新型四倍体鱼群体，具备形成新种所需的关键因素。

With the stble genetic tetraploidy and the fertility in the nature environments, this allotetraploid population presented the key factors to form a new species with 200 chromosomes.

异源四倍体鲫鲤稳定的染色体数目和正常的性腺结构以及自然条件下的生殖传代行为，说明该异源四倍体鲫鲤已成为一个染色体数目为4n=200、遗传性状稳定的新型四倍体鱼群体，具备形成新种所需的关键因素。

The invention relates to polyimide molding powder with low melt viscosity and a preparation method, which uses 3,4'- diamino diphenyl ether, 3,3',4,4'-diphenyl ketone dicarboxylic anhydride, 3,3',4,4'-biphenyltetracarboxylic dianhydride, 3,3',4,4'- triphenyl diether dicarboxylic anhydride, 3,3',4,4'- diphenyl ether dicarboxylic anhydride and other monomers to polymerize at 100 to 140 DEG C, to get molding powder with a melt viscosity in the range of 1000Pa.s to 5000Pa.s.

本发明属于一种低熔体粘度聚酰亚胺模塑粉及制备方法，是采用3，4′-二氨基二苯醚同3，3′，4，4′-二苯酮四酸二酐、3，3′，4，4′-联苯四酸二酐、3，3′，4，4′-三苯二醚四酸二酐、3，3′，4，4′-二苯醚四酸二酐等单体在100～140℃聚合，获得熔体粘度在1000Pa.s～5000Pa.s范围内的模塑粉。

Herbacium were isobilateral leaves, and those of G. hirsutum and C. barbadense were dorsiventral leaves. The reciprocal F〓 of cross G. arboreum×G. herbacium were also isobilateral leaves, while reciprocal F〓 cross of G. hirsutum×G. barbadense were also dorsiventral leaves. The quadrispecific hybrids F〓 were isobilateral leaves, regardless of their cytoplasms. The structures of the leaf stalks and the stems were analogous to each other among the four cultivated cotton species except their diameters varied with species.

四个栽培棉种及其种间杂种F〓的形态学和细胞遗传学观察四个栽培棉种的植株、叶片、茎杆以及花器等器官都有明显的差异；叶片、茎杆以及叶柄的横切面结构观察结果表明，两个二倍体栽培棉种的叶片横切面构造为等面叶，两个四倍体栽培棉种却均为背腹叶；F〓正反交的叶片也为等面叶，F〓正反交F〓仍为背腹叶，而它们的四元杂交种均为等面叶；四个栽培棉种的叶柄和茎的横切面结构基本一致，只是直径形状和和维管束多少的不同，四元杂种的叶柄和茎的横切面结构的差异不明显。

The cytogenetics of interspecific hybrids among the four cultivated cotton species were studied in this paper and results are as follows: The diploid interspecific hybrid (G. arboreum×G. herbacium) F〓 had a four-chromosome-ring at the meiotic metakinesis. The synapses of tetraploid hybrid (G. hirsutum ×G. barbadense) F〓 was found to be regular, which mainly formed bivalents, sometimes some univalents, multivalents and chromosome bridge.

四个栽培棉种间杂交种F〓的细胞学观察结果表明，F〓减数分裂中期Ⅰ，形成一个环状四价体，直接证明了亚洲棉与草棉之间存在一对相互易位；F〓减数分裂中期Ⅰ联会基本正常，主要形成二价体，偶尔出现一些单价体和多价体，以及染色体桥。

Four bidentate NS ester ligands, two bidentate NS amide ligands, tridentate MBPA and tetradentate BMBPA ligands have been synthesized.

合成了四种含有酯基的NS二齿配体-CYE系列物，两种含有酰胺基的NS二齿配体，三齿配体MBPA和四齿配体BMBPA。

Pitardii,all from the Jinshajiang Valley of Yunnan and Sichuan, were cytologically studied in this work. Among 34 populations of C.reticulata studied here, 21 were found to be tetraploids (2n=60), 11 hexaploids (2n = 90), and the remaining two diploids (2n = 30). Tetraploid was reported in C. reticulata for the first time and its karyomophology was studied.

reticulata及其两个近缘种(怒江山茶C.saluenensis和西南山茶C.pitardii)进行了细胞学研究。34个居群的云南山茶花中，21个居群是四倍体类型(2n=60)，11个居群是六倍体类型(2n=90)，另2个居群为二倍体(2n=30)，云南山茶花的四倍体类型为首次发现，并且进行了核形态研究。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。