density of positive meaning in English
正片密度
Examples
- Different amount of copies in different tissues attribute to the different density of positive signals . the result of the experiment suggested that the transgenic animals can be produced by spermatozoa - mediated gene transfer after the entrapment of liposome . and because the exogenous dna occurs losing the segments . partly integration , or existin g outside of genome dna , the rate of chimerism is relatively high
结果表明： ( 1 )脂质体包裹外源基因转染精子的方法，可将外源基因导入受精卵中，能够获得转基因动物，并得到了较高的转基因阳性率； ( 2 )精子携带的外源dna的整合过程是随机的，在受精过程和胚胎早期分化过程中可能发生了片段丢失、不完全整合或游离于基因组存在而产生嵌合体。