Sax found average chiasma frequencies of 2 . 3 to 2 . 5 per bivalent in pines and larches Sax发现松树和落叶松每条二价染色体的平均交叉频率是2 . 3 2 . 5 。
The hemolytic activity was optimally assayed at 20 ? , at ph 7 . 5 , and in the presence of 10 mm mg2 + 溶血活性是二价离子依赖的,热敏感的(溶血活性热灭活温度是45 ) 。
In addition , divalent metal adduction provided improved positive mode ionization efficiency for these peptides 此外,二价金属加合提高了这些肽段的正离子模式离子化效率。
The chiasmata can slip off the ends of the bivalents , and thus chiasma frequency may be reduced by terminalization 有时交叉可以从二价体末端处滑开,因此移端过程可以降低交叉频率。
Vitamin b12 is destroyed by oxidizing and reducing agents , by aldehydes , ascorbic acid , ferrous salts , vanillin and acacia 维生素b12被氧化剂和还原剂、醛类抗坏血酸、二价铁盐、香草醛和阿拉伯树胶破坏。
Heating installations for different sources of energy ; use of heat pumps including electrically operated compressors in bivalent heating installations 不同能源用采暖设备.第2部分:二价采暖设备的热力泵包
Terminalization the movement of chiasmata to the end of the bivalent arms , a process that may occur during late prophase i of meiosis 交叉)移端:发生在第一次减数分裂后期,染色体交叉向二价体染色体臂的末端移动的过程。
Synapsis ( pairing ) the association of homologous chromosomes during the prophase stage of meiosis that leads to the production of a haploid number of bivalents 联会(配对) :能产生单倍二价体的减数分裂前期,同源染色体的联合现象。
To compare the complement lytic system between cephalochordate and cartilaginous fish , lip shark ( chiloscyllium plagiosum ) serum complement activities were investigated 溶血活性是二价离子依赖的,热敏感的(溶血活性热灭活温度是45 ) 。
Presently two preparations of meningococcal vaccines are registered in hong kong - the bivalent serogroups a c and the quadrivalent serogroups a , c , y w135 二价疫苗可以预防a型和c型脑膜炎双球菌,四价疫苗则可以预防a c w135和y型脑膜炎双球菌。