首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Researchers say extra vitamin E fed to turkeys appears to help control infections from listeria(李氏杆菌). People who eat foods that
Researchers say extra vitamin E fed to turkeys appears to help control infections from listeria(李氏杆菌). People who eat foods that
admin
2015-01-31
48
问题
Researchers say extra vitamin E fed to turkeys appears to help control infections from listeria(李氏杆菌). People who eat foods that contain this bacteria can get listeriosis(李氏杆菌病).
This disease is especially dangerous to pregnant women, newborn babies and people with weakened defenses. The United States has more than two thousand cases of listeriosis each year and five hundred people die of it. Some cases have been linked to poultry(家禽)products that have not been cooked enough. The researchers found that vitamin E improved the ability of turkeys to fight the growth of listeria. The findings could help other meat industries as well.
Irene Wesley led the study for the United States Department of Agriculture. Researchers from Iowa State University and the University of Arkansas also took part. The findings appeared in Poultry Science magazine earlier this year.
Vitamin E is found in oils from vegetables, grains and animals. It helps protect some kinds of fatty acids that are necessary for healthy cells. Vitamin E helps prevent oxygen from combining with these fats to cause damage to cells.
Turkeys need vitamin E for normal development. But the scientists added extra amounts to the diet of two groups of turkeys. The birds were one day old. Two other groups were not given any extra vitamin E. After six weeks, the researchers infected all the young turkeys with listeria. The scientists then tested the birds for the presence of the bacteria over a period of time.
The results showed that the birds that received extra vitamin E did not get infected as often as the others. The birds that received the largest amount had the lowest number of infections.
The scientists say vitamin E has a similar effect on chickens. They say chickens and turkeys that receive added vitamin E develop more infection-fighting cells called lymphocytes. The increased number of these cells appears to also help protect against other diseases that can be carried by birds.
The scientists continue tests. They want to see if vitamin E can stop other dangerous bacteria that can enter food. They are testing it against salmonella and Campylobacter.
Which of the following is the EXCEPTION about the function of vitamin E?
选项
A、It helps protect some necessary fatty acids for healthy cells.
B、Vitamin E only helps control infections from listeria.
C、Vitamin E helps the poultry develop more infection-fighting cells.
D、Extra amounts of vitamin E can improve the quality of meat.
答案
B
解析
细节题。此题采用排除法。根据短文第四段中It helps protect some kinds offatty acids that are necessary for healthy cells.Vitamin E helps prevent oxygen fromcombining with these fats to cause damage to cells.可知选项A、D表述正确;根据倒数第二段中added vitamin E develop more infection—fighting cells可知选项C表述正确。故选B。
转载请注明原文地址:https://kaotiyun.com/show/ogq7777K
0
大学英语四级
相关试题推荐
Alotofpeopleinstinctivelybelieve—withoutreallyknowing—thatpoorreadersarenotespeciallysmart.Anewstudybyres
Alotofpeopleinstinctivelybelieve—withoutreallyknowing—thatpoorreadersarenotespeciallysmart.Anewstudybyres
Alotofpeopleinstinctivelybelieve—withoutreallyknowing—thatpoorreadersarenotespeciallysmart.Anewstudybyres
Alotofpeopleinstinctivelybelieve—withoutreallyknowing—thatpoorreadersarenotespeciallysmart.Anewstudybyres
A、Thewomanshouldbealerttoheavytraffic.B、Manypeoplegotothecountrysideattheweekend.C、Thewomanshouldguardagain
Peoplewhosejobsrequirethemtositforlongperiodsoftimesufferasmuchfrombackpainaspeoplewholiftalldaylong.
Peoplewhosejobsrequirethemtositforlongperiodsoftimesufferasmuchfrombackpainaspeoplewholiftalldaylong.
Peoplewhosejobsrequirethemtositforlongperiodsoftimesufferasmuchfrombackpainaspeoplewholiftalldaylong.
随机试题
牙髓电活力测试可能出现假性反应,引起假阳性反应的原因不包括下列哪一项()
A.气胸B.空气栓塞C.低钾血症D.高血糖致高渗性非酮性昏迷E.导管性脓毒症施行肠外营养最常见的并发症是()
下列关于数罪并罚的做法与说法。哪些是错误的?()(2002年卷二第39题)
()审核的审核准则主要依据自身的职业安全健康管理体系文件。
下列选项中,属于水利工程质量监督机构的质量监督权限的是()。
存在()的情况,责任人终身不得重新取得会计从业资格证书。
甲公司为增值税一般纳税人,主要从事机电产品的生产销售,并下设运输部门负责所售货物的运输服务并对外承接其他运输劳务。2016年2月发生如下业务:(1)销售机电产品一批,产品不含税销售收入200万元;另取得含税货运收入20万元,价款已经全部收到。
纳税人在纳税年度发生的经营亏损,可以用下一年度的所得弥补;下一纳税年度的年所得不足弥补的,可以逐年延续弥补,但是延续弥补期最长不得超过5年。()
流水线生产是指生产对象按照一定的工艺路线顺序地通过各个工作地,并按照统一的生产速度完成工业作业的生产过程。
根据上海市统一规划,新扬子江码头将洗去征尘,转换角色,一改昔日军港码头的_______,嬗变成黄浦江45公里美丽岸线中一段特别风景。今后,当我们流连忘返,徜徉其间,享受习习江风,观赏浦江两岸美景的时候,千万别忘了海军扬子江码头——这朵昔日洁白无比的海上
最新回复
(
0
)