tetrad

Cytokinesis was simultaneous and the arrangement of microspores in the tetrad was tetrahedral.

胞质分裂为同时型,四分体中小孢子排列呈正四面体形.

Stability of the complexes shows the "Tetrad effect".

配合物稳定性呈四分组效应。

During the mitosis of microspore mother cells, the nucleus of tapetum divides into two. The primary sporogenous cells develop into microsporocyte by mitosis. The microsporocyte undergoes simultaneous meiotic division and produces tetrahedral tetrad.

初生造孢细胞经过有丝分裂，形成次生造孢细胞，然后次生造孢细胞发育成小孢子母细胞，小孢子母细胞经过减数分裂形成四分体，胞质分裂为同时型。

The result showed: 1% Snailase+ 1.2% Cellulase+ 0.5% Hemicellulase is the best enzyme combination on isolation of protoplasts from potato tetrad after cold pretreatment, the highest yield up to 78.05%;

结果表明：用1%蜗牛酶+1.2%纤维素酶+0.5%半纤维素酶的混合酶液能大量游离出经低温预处理的马铃薯四分体小孢子原生质体，原生质体的最高产率达78.05%；

Tetrad effect of REE in apatites from pegmatite No.3, Altay, Xijiang and its implications

新疆阿尔泰可可托海3号伟晶岩脉磷灰石矿物中稀土元素四分组效应及其意义

Different levels of Pi had no significant effects on the tetrad effect of MRE, but it notable increased the enrichment of HREE in wheat leaves.

不同Pi处理对四重效应无明显作用，但进一步加强HREE在小麦叶片中的富集。

Microspore mother cells meiosis was conformed to simultaneous type with mostly tetrahedral and decussate tetrad.

小孢子母细胞减数分裂属于同时型，小孢子在四分体中的排列方式多数为四面体形，少数为十字交叉形。

After the tetrad was formed, the nuclear envelope and the golgi bodies show a particular activity which is probably related to the exine depositing.

四分体小孢子形成后，核被膜及高尔基体显得非常地活跃，他们可能与外壁的沉积有关。

The results showed that microsporogenesis could process normally and there was no difference in the tapetal cell between 8A and 8B lines before tetrad stage.

结果表明：不育系和保持系都能正常进行减数分裂，绒毡层细胞无明显差异，形成了正常的四分孢子。

A summary on surgical treatment of 297 patients with Fallot's tetrad

法洛四联症297例外科治疗

A study on the "tetrad effect" of lanthanide by stoichimetric displacement model of retention

用计量置换模型研究镧系元素四素组效应

In this paper the fine structure of the distribution model of REE in Karst deposits-the tetrad effect and its meaning are discussed.

本文阐述喀斯特沉积物中稀土分布模式的精细结构&稀土四重效应特征及其研究意义。

The tapetum begins to vary at the stage of tetrad with the cytoplasm anther cell.

小孢子孢原为多细胞,小孢子母细胞减数分裂产生四面体型的小孢子四分体.

Megaspore tetrad is linear. The chalazal megaspore develops into an embryo sac of Polygonum type.

大孢子四分体为线形, 合点端功能大孢子发育成为蓼型胚囊.

In the framework of Hayashi's gravitation theory with torsion, the general form of parallelism tetrad field in Schwarzshild coordinate system is presented.

在有挠引力理论框架内，给出施瓦西坐标系平行标架场的一般形式。

The abortion of 8-602A occurred from the archesporial cell stage to the tetrad stage, mainly at the stage of archesporial cell.

8-602A败育发生于孢原细胞时期至四分体时期，主要是孢原细胞时期。

Hypodermal archesporium is 2 or 3 cells; a single cell well developed into megaspore mother cell. Undergoes meiotic divisions, produces a linear tetrad.

大孢子孢原细胞2~3个，其中1个发育为大孢子母细胞，大孢子母细胞减数分裂形成直线四分体，合点端的大孢子为功能大孢子，珠孔端3个大孢子退化。

At tetrad stage, dyad, triad, tetrad with micronucleus and polyad appeared.

四分体时期出现二分体、三分体、含微核的异常四分体及多分体。

The meiosis behavior of pollen mother cell of sterile plant was normal and tetrads were formed. However degradation of tetrad callose wall was abnormal.

不育株花粉母细胞减数分裂过程基本正常，可形成四分体，但四分体胼胝质壁不能适时解体，小孢子或于胼胝质壁内彻底败育解体，或发育至单核中期败育；

The chalazal megaspore of a linear tetrad develops into a polygonum type sac.

四分体线行排列,合点端的大孢子发育为蓼型胚囊.

Reduced spinor formalism by means of tetrad calculus with application to yang's gravitational field equations

标架形式的简化旋量体系及其对杨振宁方程的应用

At this point each chromosome consist of a pair of chromatids and the two associated chromosomes are termed a tetrad.

此时每条染色体由一对染色单体构成,这两条联合的染色体称为四分体.

Embryological observation of ovary culture shows that haploid plants are from megaspore tetrad, while diploid plants are probably from nucellus cell.

同时在珠心细胞中观察到旺盛的分裂活动和细胞团的形成，这可能是二倍体植株的来源。

According to the observation of meiosis II telophase tetrad of Chinese fir, the meiosis of tetrad is single plane, the division mode of cytoplast is simultaneous.

根据对杉木末期Ⅱ四分体的观察，杉木四分体分裂方式主要是单平面分裂方式，其胞质分裂方式为同时型。

The investigation of the CCTV feature-programme titles shows that the commonest ones are those of the modifier modified word structure in tetrad pattern, whose basic rhythmic unit is disyllabic foot.

对中央电视台栏目名的考察和分析表明，电视栏目名以四字格偏正结构最为常见，双音节音步是其基本的韵律单位。

The process of pollen abortion begins with vacuole formation and gradual enlargement in the tetrad.

花粉败育的过程从四分体开始，细胞质内液泡逐渐增大，接着细胞器解体，细胞核解体。

Callose exists mainly in transverse walls during dyad, triad and tetrad stages, a little in side walls.

二分体、三分体、四分体时期，胼胝质荧光主要存在于大孢子之间的横壁上，侧壁内胼胝质荧光较弱。

The characteristics of tetrad was that the nucleus and Golgi bodies being in the active state.

四分孢子的显著特征是细胞核和高尔基体呈活跃状态.

Microspore abortion occurred after the tetrad formation.

小孢子败育发生在四分体形成以后.

A Simple Method to Correct Genetic Distance Between Linked Genes and a Correction of Calculating Data in Tetrad Analysis in Neurospora crassa

链孢霉四分体分析连锁基因距离矫正的一种简便方法和计算数据的修正