首页
登录
职称英语
【B1】 [br] 【B4】 [originaltext] Scientists have developed a new cancer drug. So
【B1】 [br] 【B4】 [originaltext] Scientists have developed a new cancer drug. So
游客
2023-08-01
41
管理
问题
【B1】 [br] 【B4】
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
results
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2886670.html
相关试题推荐
[originaltext]Ittakesmorethangoodlookstobeanairhostess.Brainswi
[originaltext]Ittakesmorethangoodlookstobeanairhostess.Brainswi
[originaltext]Ittakesmorethangoodlookstobeanairhostess.Brainswi
[originaltext]W:Taxi!I’mgoingtotheNationalMuseumofArt.Howlongdoesi
[originaltext]W:Taxi!I’mgoingtotheNationalMuseumofArt.Howlongdoesi
[originaltext]Duringthepastdecade,therehasbeenarapidincreaseinvi
[originaltext]Kenyawasabeautifulcountryinhabitedbydifferentgroupso
[originaltext]W:Nowpeoplearesufferingmorestress,especiallywomen.Iwond
[originaltext]W:Nowpeoplearesufferingmorestress,especiallywomen.Iwond
【B1】[br]【B11】[originaltext]TheBookofPoemswasabookofthepoemsand
随机试题
[originaltext]M:Today,weinviteMs.Lesleytotalkabouteducation.Howdoes
Fordecades,thedebateaboutbalancingworkandfamilylifehasbeenframed
Beginninginthe1950sand1960s,Japanbegandevelopingareputationforit
Completetheformbelow.WriteNOMORETHANTHREEWORDSAND/ORANUMBERforeach
Chemistrydidnotemergeasascienceuntilafterthescientificrevolution
审稿题:审读短稿,按审稿的基本要求指出其中存在的错误或缺漏。(本题20分)
A.3个月 B.9个月 C.12个月 D.18个月 E.24个月体重为出
男性,48岁。查体时B超检查发现左侧肾下极有一4.5cm×3.2cm实性占位,肾
下列建筑可采用自然通风方式防烟的是()。A.建筑高度为62m的公共建筑 B.
贷款人应根据审慎性原则,实行统一审贷和授权审批。()
最新回复
(
0
)