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It is reported that alkannin and shikonin isolated from the roots of Lithospermum erthyrorhizon or Alkanna tinctoria and their acylshikonin derivatives are potent selective inhibitors of DNA Topoisomerase Ⅰ.

文献报导紫草素和酰基紫草素等具有DNA拓扑异构酶Ⅰ的选择性抑制活性。本组曾合成得到少量环异紫草素（8），它对小鼠白血病P-388肿瘤细胞具有强烈的抑制作用。

Since methane is a potent greenhouse gas, things would have got very hot very quickly, to the detriment of any big animal that could not shed heat easily.

由于甲烷是一种效果强烈的温室气体，被此侵蚀的物质会急速地变热，即使身躯庞大的动物也无法摆脱，最终也只有毁灭的结局。

Protest leaders said they gathered about 500 liters of blood in a potent gesture, especially for Thailand, where many animist and superstitious beliefs coincide with the Buddhism practiced by the bulk of the country's 65 million people.

组织抗议的领导人说，他们已收集了500升鲜血。尤其是在泰国这个信仰万有灵论、间有各种迷信思想，且全国6500万人口中大部分信仰佛教的国度，这已是个强劲的信号。

Avermectins is one of highly potent anthelmintic and insecticidal agents discovered so far. The key to enhance avermectins production lies in screening of high-producing mutant and optimizing of culture conditions.

作为目前发现是为有效的杀虫剂之一的阿维菌素，其生产水平的提高关键在于阿维菌素高产突变株的获得以及发酵工艺的优化。

Avermectins are a series of 16-membered macrocyclic lactones produced by Streptomyces avermitilis with potent anthelmintic and insecticidal activity.

阿维链霉菌产生的阿维菌素是一组高效、低毒、广谱的杀虫抗生素，在医药、农业和畜牧业生产中具有良好的应用价值和广阔的市场前景。

These results indicate that the potent antianaphylaxis effect of myricetin may be associated with the inhibition of typeⅠand type Ⅳ allergic reaction.

杨梅素具有抗过敏作用，机制可能与抑制Ⅰ、Ⅳ型变态反应有关。

These results indicate that the potent antianaphylaxis effect of myricetin may be associated with the inhibition of typeⅠand type Ⅳ allergic reaction .

杨梅素具有抗过敏作用，机制可能与抑制Ⅰ、Ⅳ型变态反应有关。关键词杨梅素；抗过敏；被动皮肤过敏反应；瘙痒反应；迟发型超敏反应

RESULTS: Both two recipes showed potent antifebril,anticonvulsive and sedative effects.

采用酵母引起的大鼠发热模型、伤寒副伤寒疫苗引起的兔发热模型、士的宁致小鼠惊厥及电惊厥模型等观察了2种配方的解热、抗惊厥和镇静作用。

In the 1970s,TCM tipped off researchers to qinghaosu, a compound in sweetwormwood whose derivatives are potent antimalaria drugs.

在1970年代，在中药的启发下研究人员从青蒿中发现了青蒿素做为抗疟疾的良药。

In the 1970s, TCM tipped off researchers to qinghaosu, a compound in sweet wormwood whose derivatives are potent antimalaria drugs.

在1970年代，在中药的启发下研究人员从青蒿中发现了青蒿素做为抗疟疾的良药。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。