tetrad

英

美

网络  四分体; 四联球菌; 四联体; 四分子; 四分孢子

复数：tetrads　

计算机

英英释义

noun

• the cardinal number that is the sum of three and one
  Synonym:four4IVquaternquaternionquaternaryquaternityquartetquadrupletfoursomeLittle Joe

双语例句

• First, we construct the symmetrized null tetrad from which the spin coefficients and Dirac equation are derived.
  首先，构造对称化零标架，计算旋系数，导出Dirac方程，并对其进行化简。
• At both tetrad and pollen mother cell stages, the amount of polysaccharides in pollen cells of male sterility line was slightly higher than that of its maintainer lines.
  在花粉母细胞和四分体时期，不育系细胞中多糖物质的含量稍高于保持系细胞中的含量，但它们之间差异不显著。
• 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。
• 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 Huangshan A-type granites with tetrad REE: constraints on Mesozoic lithospheric thinning of the southeastern Yangtze craton?
  高度演化的黄山A型花岗岩：对扬子克拉通东南部中生代岩石圈减薄的约束？
• The pairing and segregating of homologous chromosomes at the frist and second division of meiosis were conformed with PMC meiosis, and finally, the tetrad were formation.
  在减数第一和第二次分裂中，同源染色体的配对和分离基本正常，最后形成四分体。
• This phenomenon occurs in the early tetrad stage.
  这个现象在早期四分体阶段出现。
• It appears however that the formation of megaspore tetrad associated with the high GA3/ ZT ratio.
  高水平的ZT/IAA有利于大孢子母细胞和花粉粒的形成，而大孢子四分体的形成则需要高的GA3/ZT比值。
• The results are as follows: During anther early development, only few ATPase precipitates located in small vacuoles and the nucleus of microspore mother cell and tetrad microspore.
  结论如下：在花药发育过程中，小孢子母细胞和四分体内的ATPase很少，仅在细胞核及小液泡中分布有少量的ATPase。
• Chromosomes out of nuclei can be seen both at prophase ⅱ and tetrad period.
  前期Ⅱ和四分体时期可观察到核外染色体；