b1a meaning in English
都江堰龙池
见义勇为
送温暖工程
Examples
- A rapid uptake of avermectin b1a was observed and steady - state levels were reached within 14 to 18 days . depuration of avermectin bia residues in muscle of sturgeon was relatively rapid with more than 50 % clearance occurring after about 4 - 6 days in control water
Avmb _ ( 1a )在鲟鱼体内的残留消除比较迅速，大约经过4 - 6天的消除期，体内残留量大约消除50 ；经过14 - 18天的消除期，体内残留量消除超过95 。 - 281 double crossover mutants were examined by fermentation experiments and hplc analysis for production of polyketides . besides avermectin b1a and b2a , a new compound ( about l ~ 4ug / ml ) which showed a retention time and fragmentation patterns identical to those of the authentic sample of 22 , 23 - dihydroavermectin bla by hplc and lc / ms analysis were detected in culture extracts of 27 isolates
在筛选的281个双交换突变株中，有27株除了产生阿维菌素b1a和b2a ，还产生一个新组分，经hplc和lc ms分析，证实该组分为c - 22 ， 23双氢阿维菌素b1a (即伊维菌素b1a ) 。 - Compounds with bcf values < 100 are considered to be of little environmental concern and not expected to bioconcentrate into tissues . in this in vivo test , the low uptake of avermectin b1a and its low persistence in sturgeon muscle demonstrate that it will neither bioaccumulate in individual organisms nor biomagnify in the food chain
在试验中，鲟鱼对水中的avmb _ ( 1a )摄取率较低， avmb _ ( 1a )在鲟鱼体内消除迅速，以及avmb _ ( 1a )较低的bcf值，表明不易在水生生物食物链中被生物浓缩，不易在水生生物体内富集，对环境和人类的健康影响较小。 - It is effective in controlling different phytophagous pests of field crop , ornamentals , vegetables , fruits and in controlling fire ants . to assess the potential impact of avermectins on the environment , the bioaccumulation potential of avermectin b1a , its major component , in sturgeon ( a . schrenckif ) was examined
本文对阿维菌素( avermectin ， avm )环境毒理的一部分内容进行试验研究，主体试验部分为研究进入到淡水中的阿维菌素在鲟鱼体内的生物富集和生物消除规律。 - Shaking flask experiments and hplc analyses showed that the four mutants no longer produced the toxic oligomycin , and only made four components of avermectins b , which were avermectin b1a , b1b , b2a , b2b . the yields of avermectins b in these mutants were separately equal to those in cz8 - 73 . this revealed that olma genes deletion did n ' t affect the biosynthesis of avermectins
将4株经southern杂交验证正确的基因缺失突变株进行摇瓶发酵和hplc检测，发现4个突变株均不再产生寡霉素而仅产阿维菌素b组分，阿维菌素的总产量和b1的产量与出发菌株相当，说明寡霉素pks基因簇的缺失并不影响阿维菌素的生物合成。