首页
登录
职称英语
【B1】 [br] 【B5】 [originaltext] Scientists have developed a new cancer drug. So
【B1】 [br] 【B5】 [originaltext] Scientists have developed a new cancer drug. So
游客
2024-03-03
64
管理
问题
【B1】 [br] 【B5】
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
magazine
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3502931.html
相关试题推荐
[originaltext]Goodmorning,everyone.I’mgoingtotalkabouttheenvironme
[originaltext]Goodmorning,everyone.I’mgoingtotalkabouttheenvironme
[originaltext]Goodmorning,everyone.I’mgoingtotalkabouttheenvironme
[originaltext]Moderator:Goodevening,ladiesandgentlemen.It’smygr
[originaltext]Aswithsomanyotherthingsinlife,exercisemayworkbest
[originaltext]Aswithsomanyotherthingsinlife,exercisemayworkbest
[originaltext]Aswithsomanyotherthingsinlife,exercisemayworkbest
[originaltext]Anewsystemhasbeendevelopedtomeasurethehealthofthe
[originaltext]Anewsystemhasbeendevelopedtomeasurethehealthofthe
[originaltext]W:Hi,Jim.Whatareyoudoing?M:Oh,hi,Linda.I’mworkingon
随机试题
Agreatdealofattentionisbeingpaidtodaytotheso-calleddigitaldivid
TopromotethedevelopmentofChina-USrelations,ChinaneedstoknowtheUnited
AA。图中黑色小三角经过移动依次得到后面各图中的位置。观察发现,第一幅图左上角黑色三角形顺时针移动一格得到下一幅图中的位置,另一个黑色三角形逆时针移动一格得到下
2011年末,我国城乡就业人数碇以76420万人,比2002年增加3140万人。
A公司从B公司处租入设备一台,试用期3年。合同规定,A公司在3年内每年年末向B公
某8层民用钢框架结构,平面规则,剖面如题图所示。首层层高7.2m,二层及以上楼层
资料:Demystifyinghowsocialandhuman-lik
某商店的两件商品成本价相同,一件按成本价多25%出售,一件按成本价少13%出售,
在丰富的教学实践基础上,把学习过程概括为学——思——行的统一过程的学者是我国古
(2018年真题)《水利水电规程施工安全防护设施技术规范》(SL714-2015
最新回复
(
0
)