原文已被隐藏，你可用 快捷键 - 或点击 显示原文 按钮来查看原文
第1段
1 .This is Scientific American 60-Second Science. I'm Cynthia Graber. Got a minute?
该句暂无译文！
2 .If you need a new liver, doctors have about twelve hours to transport it from a donor.
该句暂无译文！
3 .That ticking clock severely limits the ability of doctors to get organs to patients.
该句暂无译文！
4 .Now researchers have demonstrated a method that kept rat livers viable up to four days.
该句暂无译文！
5 .The scientists lowered the livers to below freezing temperatures, while flooding the tissue with antifreeze chemicals to prevent the formation of damaging ice crystals.
该句暂无译文！
6 .But such cooling alone is not sufficient, due in part to the liver's wide variety of cell types and functions.
该句暂无译文！
7 .So the researchers also used machine perfusion: as the livers were cooled they were flushed with solutions that kept them operational.
该句暂无译文！
8 .They were perfused again as they were brought back to above-freezing temps.
该句暂无译文！
9 .All the rats that were implanted with 3-day-old livers survived for three months.
该句暂无译文！
10 .Nearly 60 percent of the rats with four-day-old livers survived.
该句暂无译文！
11 .In contrast, no rats that received 3- and 4-day-old livers preserved by currently used methods survived.
该句暂无译文！
12 .This work is an early step toward creating a system that could work in humans,
该句暂无译文！
13 .which would dramatically improve the chances of getting organs to people who desperately need them.
该句暂无译文！
14 .Thanks for the minute, for Scientific American 60-Second Science. I'm Cynthia Graber.
该句暂无译文！