antibiotic resistance clue found 细菌抗药性线索被发现-凯发k8官网

antibiotic resistance clue found 细菌抗药性线索被发现
文章来源:未知 文章作者:meng 发布时间:2009-09-13 05:54 字体: [ ] 
(单词翻译:双击或拖选)

us scientists have uncovered a defence 1 in bacteria that allows them to 2 off the threat of 4.

美国科学家发现细菌的防御机制,可以使其低档抗生素的威胁。

antibiotic3 resistance" width="226" border="0" src="/upimg/090913/4_060758_1.jpg" />
mrsa highlights the problem of antibiotic resistance

it is hoped the findings could help researchers boost the effectiveness of existing treatments.

the study published in science found that nitric 5(氧化一氮) produced by the bacteria eliminates some key effects of a wide range of antibiotics(抗生素).

one uk expert said 6 nitric oxide synthesis(合成,综合) could be an important advance for tackling 7 infections.

antibiotic resistance, for example with mrsa, is a growing problem and experts have long warned of the need to develop new treatments.

the latest research, done by a team at new york university, showed that in bacteria the production of nitric oxide - a small 8 made up of one nitrogen and one oxygen atom - increased their resistance to antibiotics.

they found the 10(酵素) responsible for producing nitric oxide were 11 specifically in response to the presence of the antibiotics.

they also showed that nitric oxide 12(减轻,缓和) damage caused by the drugs as well as 13 to neutralise many of the 14(有毒的) compounds within the antibiotic.

the researchers then showed that eliminating nitric oxide production in the bacteria allowed the antibiotics to work at lower, less toxic doses.

more effective

study leader, dr evgeny nudler, said developing new medicines to fight antibiotic resistance, such as that seen with mrsa is a "huge 15(障碍)".

"here, we have a short cut, where we don't have to invent new antibiotics.

"instead we can enhance the activity of well-established ones, making them more effective at lower doses.

dr matthew dryden, 16 in microbiology and communicable disease at royal hampshire county hospital and general secretary of the british society for antimicrobial chemotherapy, said if the 9 which creates nitric oxide could be 17(羞怯的,内向的), it could suppress the ability of the bacteria to 18(抵消,阻碍) antibiotics.

"this would be a useful 19(治疗的) advance, especially as we are running out of new classes of antibiotics and there is less antibiotic development in general."



点击收听单词发音收听单词发音  

1 zcwxr     
n.机械装置;机构,结构
参考例句:
  • the bones and muscles are parts of the mechanism of the body.骨骼和肌肉是人体的组成部件。
  • the mechanism of the machine is very complicated.这台机器的结构是非常复杂的。
2 n78ya     
v.照料(自己),(自己)谋生,挡开,避开
参考例句:
  • i've had to fend for myself since i was 14.我从十四岁时起就不得不照料自己。
  • he raised his arm up to fend branches from his eyes.他举手将树枝从他眼前挡开。
3 knjzd     
adj.抗菌的;n.抗生素
参考例句:
  • the doctor said that i should take some antibiotic.医生说我应该服些用抗生素。
  • antibiotic can be used against infection.抗菌素可以用来防止感染。
4 lzgzqt     
n.(用作复数)抗生素;(用作单数)抗生物质的研究;抗生素,抗菌素( antibiotic的名词复数 )
参考例句:
  • the discovery of antibiotics in the 20th century 20世纪抗生素的发现
  • the doctor gave me a prescription for antibiotics. 医生给我开了抗生素。
5 k4dz8     
n.氧化物
参考例句:
  • oxide is usually seen in our daily life.在我们的日常生活中氧化物很常见。
  • how can you get rid of this oxide coating?你们该怎样除去这些氧化皮?
6 11ff588a61bbc2b55de0b4c430fe2824     
抑制作用的,约束的
参考例句:
  • the high cost of borrowing is inhibiting investment by industry in new equipment. 借款的高成本抑制了企业对新设备的投资。
  • the pesticides affect the nervous system by inhibiting the enzyme cholinesterase. 这类农药抑制胆碱酯酶而影响神经系统。
7 9fczyd     
adj.狡猾的,奸诈的;(工作等)棘手的,微妙的
参考例句:
  • i'm in a rather tricky position.can you help me out?我的处境很棘手,你能帮我吗?
  • he avoided this tricky question and talked in generalities.他回避了这个非常微妙的问题,只做了个笼统的表述。
8 y6tzn     
n.分子,克分子
参考例句:
  • a molecule of water is made up of two atoms of hygrogen and one atom of oxygen.一个水分子是由p妈?f婘??妈?成的。
  • this gives us the structural formula of the molecule.这种方式给出了分子的结构式。
9 cpozf     
n.酵素,酶
参考例句:
  • above a certain temperature,the enzyme molecule will become unfolded.超过一定温度,酶分子将会展开。
  • an enzyme that dissolves the fibrin of blood clots.能溶解血凝块中的纤维的酶。
10 7881ad8ce9c83424f7874e70266ed2d8     
n. 酶,酵素
参考例句:
  • it was said that washing powders containing enzymes remove stains more efficiently. 据说加酶洗衣粉除污更有效。
  • among the enzymes which are particularly effective are pepsin, papain. 在酶当中特别有效的是胃朊酶、木瓜酶。
11 c3905c37f4127686d512a7665206852e     
adj. 激活的 动词activate的过去式和过去分词
参考例句:
  • the canister is filled with activated charcoal.蒸气回收罐中充满了活性炭。
12 7b47d4bec981196fce5005058bc2bd16     
减轻,缓解,缓和( alleviate的名词复数 )
参考例句:
  • heat often alleviates pain. 热常常能减缓疼痛。
  • a cold compress often alleviates pain. 冷敷常会减轻疼痛。
13 2rgzdc     
n.食物的一份&adj.帮助人的,辅助的
参考例句:
  • the poor children regularly pony up for a second helping of my hamburger. 那些可怜的孩子们总是要求我把我的汉堡包再给他们一份。
  • by doing this, they may at times be helping to restore competition. 这样一来, 他在某些时候,有助于竞争的加强。
14 inswc     
adj.有毒的,因中毒引起的
参考例句:
  • the factory had accidentally released a quantity of toxic waste into the sea.这家工厂意外泄漏大量有毒废物到海中。
  • there is a risk that toxic chemicals might be blasted into the atmosphere.爆炸后有毒化学物质可能会进入大气层。
15 t5yyu     
n.跳栏,栏架;障碍,困难;vi.进行跨栏赛
参考例句:
  • the weather will be the biggest hurdle so i have to be ready.天气将会是最大的障碍,所以我必须要作好准备。
  • she clocked 11.6 seconds for the 80 metre hurdle.八十米跳栏赛跑她跑了十一秒六。
16 2v0zp3     
n.顾问;会诊医师,专科医生
参考例句:
  • he is a consultant on law affairs to the mayor.他是市长的一个法律顾问。
  • originally,gar had agreed to come up as a consultant.原来,加尔只答应来充当我们的顾问。
17 fqvz0i     
a.拘谨的,拘束的
参考例句:
  • boys are often more inhibited than girls about discussing their problems. 男孩子往往不如女孩子敢于谈论自己的问题。
  • having been laughed at for his lameness,the boy became shy and inhibited. 那男孩因跛脚被人讥笑,变得羞怯而压抑。
18 vzlxb     
vt.对…起反作用,对抗,抵消
参考例句:
  • the doctor gave him some medicine to counteract the effect of the poison.医生给他些药解毒。
  • our work calls for mutual support.we shouldn't counteract each other's efforts.工作要互相支持,不要互相拆台。
19 si8zl     
adj.治疗的,起治疗作用的;对身心健康有益的
参考例句:
  • therapeutic measures were selected to fit the patient.选择治疗措施以适应病人的需要。
  • when i was sad,music had a therapeutic effect.我悲伤的时候,音乐有治疗效力。
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