首页
登录
职称英语
【B1】 [br] 【B9】 [originaltext] Scientists have developed a new cancer drug. So
【B1】 [br] 【B9】 [originaltext] Scientists have developed a new cancer drug. So
游客
2024-03-03
67
管理
问题
【B1】 [br] 【B9】
Scientists have developed a new cancer drug. So far, they have tested it only on laboratory animals. The drag is designed to invade and kill cancer cells but not healthy ceils.
First, the drag enters the cancer and destroys the supply of blood. Then it releases poison to destroy the cancer cells.
Researchers at the Massachusetts Institute of Technology in Cambridge carried out the study. The results appeared in Nature magazine. A school news release called the drug an "anti-cancer smart bomb."
Ram Sasisekharan is a professor at M.I.T. He says his team had to solve three problems. They had to find a way to destroy the blood vessels, then to prevent the growth of new ones. But they also needed the blood vessels to supply chemicals to destroy the cancer.
So, the researchers designed a two-part "nanocell". The cell is measured in nanometers, or one thousand millionth of a meter.The particle used was two hundred nanometers--much, much smaller than a human hair.
The scientists say it was small enough to pass through the blood vessels of the cancer, but it was too big to enter normal blood vessels. The surface of the nanocells also helped them to avoid natural defenses.
The scientists designed the cell as a balloon inside a balloon. They loaded the outer part with a drug that caused the blood vessels to fall in on themselves. That cut off the blood supply and trapped the nanocell inside the cancer. Then, the nanocell slowly released chemotherapy drags to kill the cancer cells.
The team says the treatment shrank the cancer and avoided healthy cells better than other treatments.
选项
答案
The particle used was two hundred nanometers--much, much smaller than a human hair.
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3502935.html
相关试题推荐
【B1】[br]【B9】[originaltext]Themostimportantpartofbeinganormalweigh
【B1】[br]【B6】[originaltext]Themostimportantpartofbeinganormalweigh
【B1】[br]【B5】[originaltext]Themostimportantpartofbeinganormalweigh
【B1】[br]【B2】[originaltext]Themostimportantpartofbeinganormalweigh
[originaltext]Billygrabbedhisfishingrodfromtheclosetandheadedfor
[originaltext]Billygrabbedhisfishingrodfromtheclosetandheadedfor
[originaltext]Writtencommunicationhasbeenthecenterofcivilizationfor
[originaltext]W:I’mgladthatyouhavedecidedtotakealook.It’sabeautifu
[originaltext]W:I’mgladthatyouhavedecidedtotakealook.It’sabeautifu
[originaltext]W:I’mgladthatyouhavedecidedtotakealook.It’sabeautifu
随机试题
Forthispart,youareallowedthirtyminutestowriteacompositiononthetopi
We’vejustinstalledafanto______cookingsmellsfromthekitchen.A、ejectB、e
目前我国期货交易所采用的交易形式是()。A、公开喊价交易B、柜台(OTC)交易C、计算机撮合交易D、做市商交易C国内期货交易所均采用计算机撮合成
[originaltext]W:Youdon’tlooktoowell.Maybeyoushouldtakethedayofffro
党领导中国人民实现“中国梦”,必须要:A.搞好党的建设 B.不断推动科学发
到试运行阶段,该工程共包括A、B两个单位工程,单位工程A办理了中间交接,单位工程
创新的最主要特点是新颖性和()。A:多层次性 B:具有价值 C:体现文化
某土坝的坝体为黏性土,坝壳为砂土,其有效空隙率n=40%,原水位(▽1)时流网如
恶性混合瘤的主要治疗手段是A.化学治疗 B.冷冻治疗 C.放射治疗 D.手
甲公司向开户银行P银行申请签发的本票超过提示付款期限后,甲公司申请退款,P银
最新回复
(
0
)