首页
登录
职称英语
【B1】 [br] 【B2】 [originaltext] Scientists have developed a new cancer drug. So
【B1】 [br] 【B2】 [originaltext] Scientists have developed a new cancer drug. So
游客
2024-03-03
33
管理
问题
【B1】 [br] 【B2】
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
invade
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3502928.html
相关试题推荐
[originaltext]Hello,everyone.Wewilltalkaboutthetechnologytoday.You
[originaltext]Goodmorning,everyone.I’mgoingtotalkabouttheenvironme
[originaltext]Goodmorning,everyone.I’mgoingtotalkabouttheenvironme
[originaltext]Moderator:Goodevening,ladiesandgentlemen.It’smygr
[originaltext]Aswithsomanyotherthingsinlife,exercisemayworkbest
[originaltext]Aswithsomanyotherthingsinlife,exercisemayworkbest
[originaltext]Anewsystemhasbeendevelopedtomeasurethehealthofthe
[originaltext]Anewsystemhasbeendevelopedtomeasurethehealthofthe
[originaltext]Anewsystemhasbeendevelopedtomeasurethehealthofthe
[originaltext]W:Hi,Jim.Whatareyoudoing?M:Oh,hi,Linda.I’mworkingon
随机试题
Thefacesofelderly,happily-marriedpeoplesometimesresembleeachother
WhichofthefollowingstatementsisNOTtrue?A、ThePuritansbelievedthattheR
Thenewshehadlandedonthemoonspreadallovertheworld.A、whichB、that
[originaltext]M:ProfessorJohnson’slectureissoboring.Idon’tthinkit’su
男,56岁。戴上颌义齿,戴义齿时前牙区牙龈疼痛。查:缺失。托式黏膜支持式可摘义齿
目前企业所得税税率一般为()。A.3% B.17% C.25% D
对某公司的司法性事件及监管调查会引发()A.系统性风险 B.战略风险 C.声
物业房屋及设施设备维修保养的主要内容包括()。A:对房屋及设施设备进行定期检查
肩峰前下方,当肩峰与肱骨大结节之间的腧穴是( ) A.肩贞 B.肩髎 C
根据《混凝土结构工程施工质量验收规范》的规定,结构混凝土的强度等级必须符合设计要
最新回复
(
0
)