大學英語作文-食品安全的福音-歐洲食品安全問題

1、高校英語作文 食品安全的福音歐洲食品安全問題歐洲一種罕見大腸桿菌的致命爆發(fā)引發(fā)了人們對食品安全問題的新的關注；在人們由于食品致病的一系列問題中,有一個最簡潔的問題卻經常難于甚至無法回答, 這就是,他們吃了什么導致生??？美國科學家開發(fā)了一種使用高科技光學掃描裝置的試驗性系統(tǒng)；這種檢測系統(tǒng)針對于食品包裝上市環(huán)節(jié)； 期望這個新科技能真的成為食品安全的福音；This is the VOA Special English Agriculture Report. Europes deadly outbreak of a rare form of E. coli bacteria has brought n

2、ew attention to food safety issues. One of the problems when people get sick from food is that the simplest question is often difficult or even impossible to answer. Just what did the people eat that made them sick. Of course, one way to avoid these medical mysteries is to keep dangerous organisms o

3、ut of the food supply. This is easier said than done, but scientists keep looking for new ways. Scientists in the United States have developed an experimental system that uses a high-tech optical scanner. The inspection system is meant for packing houses where produce is sorted for market. The syste

4、m is designed to identify the presence of contaminants like soil or animal waste on fresh produce. These can be sources of Escherichia coli, better known as E. coli. E. coli bacteria naturally live in the intestines of humans and many animals. Most kinds of E. coli are harmless but some can make peo

5、ple sick. The new scanner can also show damage and imperfections that might make the produce unappealing to shoppers. Scientists designed the system at a Department of Agriculture research center in Beltsville, Maryland. Moon Kim of the Agricultural Research Service led the team. MOON KIM: “ We were

6、 requested, we were asked, to develop a method to detect contamination in produce. So we started with the apple as the model sample.”The scanner uses a high-speed camera placed over the conveyer belt that moves the produce along. As the apples move along the belt, the scanner captures images of each

7、 piece of fruit. a The system is equipped with an ultraviolet lamp and halogen lamp that produces near-infrared light. A spectrograph device can use the near-infrared light bouncing off an apple to show evidence of damage. The ultraviolet light can show contaminants. Moon Kim says the team hopes the

8、 system will be available before long. MOON KIM: “ We are targeting for development in ”commercial plants for the next several years.The scanner can direct a sorting machine to separate the bad apples from the good ones. The system is currently able to show the surface of only half the apple as it speeds by. The inventers hope to improve the process so it can show the whole surface. And thats the VOA Special English Agriculture Report, writ