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
71
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
[img]2010q3/ct_epem_epelist_0555_20111[/img][originaltext]Myfathercannotlive
国家“十五”攻关缺血性心血管疾病发病风险的评估是目前常用的健康风险评估方法之一,
不属于苯二氮类的镇静催眠药物是()。A:唑吡坦 B:阿普唑仑 C:奥沙西泮
挡土墙在墙后土压力作用下向后移动或转动时作用于墙背上的土压力叫做主动土压力。
缺铁性贫血的病因包括( )。A.铁消耗增加 B.膳食铁摄入不足 C.铁吸收
适合用来筹备子女教育金的投资工具是()。A:权证 B:教育储蓄和教育保险 C
2012—2015年,老龄机构单位数占社会服务机构单位数的比重最大的是:A
患者女,30岁。1月来脘腹痞塞不舒,不思饮食,恶心欲呕,泛吐痰涎,头晕目眩,体位
宋代下列哪些人享有继承权()A.在室女 B.遗腹子 C.户绝之女 D.奸
下列选项中,属于霍兰德提出的基本的职业兴趣类型的是()。A.现实型 B.研究
最新回复
(
0
)