蝎毒可用于制造杀虫剂
文章来源:未知 文章作者:enread 发布时间:2011-04-28 04:57 字体: [ ]  进入论坛
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Fables1 have long cast scorpions3 as bad-natured killers4 of hapless(倒霉的) turtles that naively5 agree to ferry them across rivers. Michigan State University scientists, however, see them in a different light. Ke Dong, MSU insect toxicologist and neurobiologist, studied the effects of scorpion2 venom6(毒液) with the hopes of finding new ways to protect plants from bugs7. The results, which are published in the current issue of the Journal of Biological Chemistry, have revealed new ways in which the venom works.

Past research identified scorpion toxin8's usefulness in the development of insecticides. Its venom attacks various channels and receptors that control their prey's nervous and muscular systems. One major target of scorpion toxins9 is the voltage-gated sodium10 channel, a protein found in nerve and muscle cells used for rapid electrical signaling.

"Interestingly, some scorpion toxins selectively affect one type of sodium channels, but not others," Dong said. "The goal of our scorpion toxin project is to understand why certain scorpion toxins act on insect sodium channels, but not their mammalian counterparts."

Dong and a team of researchers were able to identify amino acid(氨基酸) residues11(残基) in insect sodium channels that make the channels more vulnerable to the venom from the Israeli desert scorpion. The team also discovered that an important sodium channel voltage sensor12 can influence the potency13(效能,力量) of the scorpion toxin.

"Investigating the venom's effect on the voltage-gated sodium channel could provide valuable information for designing new insecticides that work by selectively targeting insect sodium channels," Dong said.

Several classes of insecticides act on sodium channels, but insects become resistant14 to them over time. The researchers are studying how insects develop resistance and what alternatives can be created to control resistant pests, Dong added.



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1 fables c7e1f2951baeedb04670ded67f15ca7b     
n.寓言( fable的名词复数 );神话,传说
参考例句:
  • Some of Aesop's Fables are satires. 《伊索寓言》中有一些是讽刺作品。 来自《现代英汉综合大词典》
  • Little Mexican boys also breathe the American fables. 墨西哥族的小孩子对美国神话也都耳濡目染。 来自辞典例句
2 scorpion pD7zk     
n.蝎子,心黑的人,蝎子鞭
参考例句:
  • The scorpion has a sting that can be deadly.蝎子有可以致命的螫针。
  • The scorpion has a sting that can be deadly.蝎子有可以致命的螫针。
3 scorpions 0f63b2c0873e8cba29ba4550835d32a9     
n.蝎子( scorpion的名词复数 )
参考例句:
  • You promise me that Black Scorpions will never come back to Lanzhou. 你保证黑蝎子永远不再踏上兰州的土地。 来自电影对白
  • You Scorpions are rather secretive about your likes and dislikes. 天蝎:蝎子是如此的神秘,你的喜好很难被别人洞悉。 来自互联网
4 killers c1a8ff788475e2c3424ec8d3f91dd856     
凶手( killer的名词复数 ); 消灭…者; 致命物; 极难的事
参考例句:
  • He remained steadfast in his determination to bring the killers to justice. 他要将杀人凶手绳之以法的决心一直没有动摇。
  • They were professional killers who did in John. 杀死约翰的这些人是职业杀手。
5 naively c42c6bc174e20d494298dbdd419a3b18     
adv. 天真地
参考例句:
  • They naively assume things can only get better. 他们天真地以为情况只会变好。
  • In short, Knox's proposal was ill conceived and naively made. 总而言之,诺克斯的建议考虑不周,显示幼稚。
6 venom qLqzr     
n.毒液,恶毒,痛恨
参考例句:
  • The snake injects the venom immediately after biting its prey.毒蛇咬住猎物之后马上注入毒液。
  • In fact,some components of the venom may benefit human health.事实上,毒液的某些成分可能有益于人类健康。
7 bugs e3255bae220613022d67e26d2e4fa689     
adj.疯狂的,发疯的n.窃听器( bug的名词复数 );病菌;虫子;[计算机](制作软件程序所产生的意料不到的)错误
参考例句:
  • All programs have bugs and need endless refinement. 所有的程序都有漏洞,都需要不断改进。 来自《简明英汉词典》
  • The sacks of rice were swarming with bugs. 一袋袋的米里长满了虫子。 来自《简明英汉词典》
8 toxin hn5wb     
n.毒素,毒质
参考例句:
  • Experts have linked this condition to a build-up of toxins in the body.专家已把这一病症与体内毒素的积累联系起来。
  • Tests showed increased levels of toxin in shellfish.检验表明水生有壳动物的毒素水平提高了。
9 toxins 18c3f40d432ba8dc33bad8fb82873ea8     
n.毒素( toxin的名词复数 )
参考例句:
  • The seas have been used as a receptacle for a range of industrial toxins. 海洋成了各种有毒工业废料的大容器。
  • Most toxins are naturally excreted from the body. 大部分毒素被自然排出体外。 来自《简明英汉词典》
10 sodium Hrpyc     
n.(化)钠
参考例句:
  • Out over the town the sodium lights were lit.在外面,全城的钠光灯都亮了。
  • Common salt is a compound of sodium and chlorine.食盐是钠和氯的复合物。
11 residues 3e5a3e323766c2626c2be0d6feafa1da     
n.剩余,余渣( residue的名词复数 );剩余财产;剩数
参考例句:
  • pesticide residues in fruit and vegetables 残留在水果和蔬菜中的杀虫剂
  • All organic and metallic residues on the wafers must be removed. 片子上所有的有机和金属残留物均必须清除。 来自辞典例句
12 sensor sz7we     
n.传感器,探测设备,感觉器(官)
参考例句:
  • The temperature sensor is enclosed in a protective well.温度传感器密封在保护套管中。
  • He plugged the sensor into a outlet.他把传感器插进电源插座。
13 potency 9Smz8     
n. 效力,潜能
参考例句:
  • Alcohol increases the drug's potency.酒精能增加这种毒品的效力。
  • Sunscreen can lose its potency if left over winter in the bathroom cabinet.如果把防晒霜在盥洗室的壁橱里放一个冬天,就有可能失效。
14 resistant 7Wvxh     
adj.(to)抵抗的,有抵抗力的
参考例句:
  • Many pests are resistant to the insecticide.许多害虫对这种杀虫剂有抵抗力。
  • They imposed their government by force on the resistant population.他们以武力把自己的统治强加在持反抗态度的人民头上。
TAG标签: plants venom scorpions
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