| 1. | Zhao : what are the main function and targets of bti
赵：英国国际贸易局的主要职责和目标是什么？ |
| 2. | However , it is not very effective in highly polluted water
但要注意的是bti在污水中的防治效果欠佳。 |
| 3. | Is also a microbial insecticide with a nature and mode of action very similar to those of bti
，亦是一种微生物杀虫剂，其特性及作用模式与 |
| 4. | Some bti products with a sustained release formulation may offer an extended larvicidal activity
有些bti产品有特殊配方，可持续发挥功效，令杀灭蚊子幼虫的时间得以延长。 |
| 5. | Bti is most effective when used in the early larval stage when the larvae are actively feeding
Bti用于早期阶段的蚊子幼虫，效果比较理想，因为这时幼虫正处于活跃摄食的状态。 |
| 6. | The insecticide , which is proven to be effective against mosquito larvae , has a low level of toxicity to humans
Bti已证明能有效对付蚊子幼虫，且毒性不高，不会损害人体健康。 |
| 7. | If it is used for preventive control , repeated application at a 7 - day interval is recommended in most situations
若把bti是用作预防幼虫滋生，在大多数情况之下，每隔七日便需要施放一次。 |
| 8. | With its highly specific mode of action against a narrow host spectrum , it does not pose risks to other non - target organisms or the environment when used properly
Bti的作用极具专门针对性，所杀灭的对象有限，如使用得宜，不会危害其他生物或环境。 |
| 9. | However , the sequence indicated no homology that of cryla ( b ) and cryla ( a ) . sds - page showed that el - 1 and el - 2 expressed full - length 130kda protein in e . coll however , the recombinant plasmid from el - 1 and el - 2 , was transformed respectively by electi operation into acrystalliferous mutant bti ips 78 / ll ( serotype h14 ) and resulted in bl - i and bl - 2
2 .将p了夕和cy时基因以及它们重组休插人大肠杆菌表达载休puhe一24 ，分别获得了3种重组质粒plz19 、 plzcyta和休21ga .将重组质粒转化到不同大肠杆菌受休菌xli ， dhs仪，获得了5种含有不同基因型的转化子 |
| 10. | The 38mda plasmid containing cryla ( b ) and cryii genes from ybt - 791 was purified and transformed by electroporation into the acrystalliferous mutants 4d10 ( serotype h3ab ) and bti ips 78 / 11 ( serotype h14 ) . the two different serotype transformants , mbl - 1 and mbl - 2 harboring cryl a ( b ) and cryii were obtained , respectively . sds - page analysis showed that the transformants could express 130kda and 65kda proteins
并将携带有cry a ( b )和cry基因的38mda质粒分别电转化到不同血清型苏云金芽胞杆菌无晶体突变株4d10 ( h _ ( 3ab ) )和btiips ? 78 11 ( h _ ( 14 ) )中，证明了相同基因型在不同血清型受体中有不同的杀虫活性。 |
