致死剂量

In subsequent experiments, the antioxidant enzyme activities of superoxide dismustase, catalase and glutathione peroxidase in juvenile goldfish exposed to single compound and equitoxic binary mixtures of 2-chlorophenol and 2, 4-dichlorophenol were investigated. Finally, the relationship between lethal doses and effective concentrations in the experiments are discussed.

第二部分通过系统研究氯酚类化合物单一化合物和等毒性二元混合物暴露对鲤科金鱼幼鱼的急性联合毒性作用方式和肝脏组织内三种细胞抗氧化酶(SOD， CAT和GSH-Px)的活性变化，探讨了水生生物急性致死剂量与效应浓度之间在数值上可能存在的相关性。

A study of housefly esterase by means of a sensitive colorimetric method［J］.

不同杀虫剂亚致死剂量处理对烟粉虱生长发育的影响［J］。

The results indicated that the treatment of irradiation restrained the growth and differentiation of protocorm, especially to roots.The LD50 is 67.23Gy, because the protocorm is a integrate embryoids and higher tolerance was found. Ploidy analysis showed that most of aberrant seedlings go with the change of DNA and they were not euploid. When the plants trearted by irradiation, some of aberrant seedlings appeared stem forfication, and leaves appeared chlorophyll-deficient or green-white.,probably due to some genes' expression or closing.

结果表明：辐照处理对种胚原球茎的生长和分化有抑制作用，尤其是对根的抑制更为明显；由于种胚原球茎的完整性好，耐受性强，其辐照半致死剂量(LD50)为67.23Gy；流式细胞分析表明，大多数外部形态发生改变的植株其细胞内DNA的倍性发生了改变，出现相当多的非整倍体；此外，辐照产生的变异苗出现茎分叉、叶片缺绿或白绿相间等现象，可能是由于某些基因的表达与关闭引起的。

The results showed YYSXF could raise survival rate of the mice after irradition, increase activity of superoxide dismutose and reduce quantity of the lipid peroxide in liver and red blood cell, extenuate micronucleus formating in V79 4 cell, promote unscheduled DNA synthesis and induce production of interleukin 2 in spleen cells and protect bone marrow cells in mice.

结果表明养阴生血饮能提高致死剂量照射动物30d和小剂量多次照射60d及荷瘤小鼠1次照射后20d的存活率；能增加超氧化物岐化酶的活性；降低过氧化脂质的水平；减少细胞的微核形成；促进脾细胞DNA修复；诱导脾细胞产生白细胞介素－2；保护骨髓造血功能

Yes, the final report states "The barbiturate, previously reported as a lethal dose has been positively identified as Nembutal by the toxicologist".

是的最终的尸检报告指出：经毒物学家鉴别原先报告的达到致死剂量的戊巴比妥酸盐就是"戊巴比妥"。

The sry-gene chimerism of bone marrows, spleen and thymus of the receiptor, T-lymphocyte subpopulation of peripheral blood cells, ConA and LPS induced T and B cells proliferation activity tests, Mixed lymphocyte reaction between the donor and the receiptor and the third part, the incidence rate of GVHD and survival analysis were observed in mice after 8Gy TBI with MSCs and haplo-BMT treatment together.

通过观察半相合BMT联合MSCs治疗致死剂量照射小鼠后不同时间骨髓、胸腺和脾脏中供者细胞植入，外周血中的淋巴细胞亚群，ConA和LPS刺激的T、B淋巴细胞增殖，供受者及第三者混合淋巴细胞反应，急、慢性GVHD的发生率和生存分析，提示MSCs促进骨髓干细胞植入，加快T淋巴细胞增殖，促进体液免疫恢复，通过供受者免疫耐受，减少GVHD发生率，提高半相合BMT动物生存率。

Howevr,the time of plantlet induction was delayed and the percentage of responding anthers as well as the number of plantlets induced per anther significantly decreased after 3kR of 60Co γ-ray radiation which was considered as a semilethal exposure.

结果表明，1kR左右的γ射线对花粉的出苗率有促进效应；3kR时，花药出苗时间延长，出苗花药率和花药产苗率明显降低，视为半致死剂量；6kR时，虽有部分花药可以出苗，但花药产苗率极低。

Finally Western blot was used to detect the amount of b-lactamase in both bacterial periplasm and cytoplasm. Antibiotic tests showed that high concentrations of ampicillin inhibited the growth of E.

抗生素抗性分析发现，高浓度的氨苄青霉素抑制E.coli Top10 pcs+细菌的生长的氨苄青霉素剂量低于对照组，其半致死剂量IC50在700~800mg/mL之间。

Based on the data of seeding rate and root growth,it is concluded that the semi-lethal radiation dose of Platanus acerifolia Willd.dry seed was 50Gy,and the suitable dose range for radiation breeding was 50 to 250Gy.

通过对悬铃木辐射组与对照组成苗率和根长进行比较，初步推测悬铃木辐射的半致死剂量为50Gy，辐照诱变的适宜剂量为50至250Gy。

In vivo, composition E markedly protected mice from lethal challenge by heat-killed E. coli and heat-killed S. aureus. Conclusions:(1) Targeting on PGN, CpG DNA and lipid A, we successfully established the platform to screen anti-inflammatory traditional Chinese medicine using biosensor technology which is highly effective, objective and feasible.

该组分经MTT法测定对小鼠RAW264.7细胞活力无影响(≤400μg/ml)，经CCK-8法测定也对小鼠RAW264.7细胞活力无影响(≤800μg/ml)；对PGN、CpG DNA及LPS刺激小鼠RAW264.7细胞分泌TNF-α有显著的抑制作用，并呈现良好的剂量-效应关系；对致死剂量的热灭活大肠杆菌和热灭活金黄色葡萄球菌攻击小鼠有显著的保护作用。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。