SSS 2012-08-20
时间：2018-12-24 作者：英语课 分类：Scientific American(八)月
英语课
This is scientific American sixty seconds science. I am Amy Kraft. Got a minute?
Sweat potatoes contains fiber 1, vitamin A and calcium 2, but the way that scientists think they can make them even more healthful is literally 3 shocking. Researchers found that giving a jolt 4 of electricity to sweet potatoes increased the level of antioxidants known as polyphenols by sixty percent. The investigators 5 placed sweet potatoes in the solution of sodium 6 chloride. They found that zero point two amps direct current gave the potatoes nearly one and a half times more antioxidants than potatoes that weren't shocked. The research was presented at the national meeting of the American Chemical society.
It seems that electric zap stressed the potatoes into produce more polyphenols as protective mechanism 7. And the treatment did not sacrifice flavor. Previous research has shown that electrically super charging white potatoes increases antioxidant levels. So perhaps it is only a matter of time before other fruits and vegetables get shock therapy, too.
1 fiber
n.纤维，纤维质
- The basic structural unit of yarn is the fiber.纤维是纱的基本结构单元。
- The material must be free of fiber clumps.这种材料必须无纤维块。
2 calcium
n.钙(化学符号Ca)
- We need calcium to make bones.我们需要钙来壮骨。
- Calcium is found most abundantly in milk.奶含钙最丰富。
3 literally
adv.照字面意义，逐字地；确实
- He translated the passage literally.他逐字逐句地翻译这段文字。
- Sometimes she would not sit down till she was literally faint.有时候，她不走到真正要昏厥了，决不肯坐下来。
4 jolt
v.（使）摇动，（使）震动，（使）颠簸
- We were worried that one tiny jolt could worsen her injuries.我们担心稍微颠簸一下就可能会使她的伤势恶化。
- They were working frantically in the fear that an aftershock would jolt the house again.他们拼命地干着，担心余震可能会使房子再次受到震动。
5 investigators
n.调查者，审查者( investigator的名词复数 )
- This memo could be the smoking gun that investigators have been looking for. 这份备忘录可能是调查人员一直在寻找的证据。
- The team consisted of six investigators and two secretaries. 这个团队由六个调查人员和两个秘书组成。 来自《简明英汉词典》