首页
登录
职称英语
Researchers have known that secondhand smoke can be just as dangerous for non
Researchers have known that secondhand smoke can be just as dangerous for non
游客
2025-01-15
35
管理
问题
Researchers have known that secondhand smoke can be just as dangerous for nonsmokers as smoking is for smokers, but now there’s fresh evidence quantifying just how hazardous the after-burn from cigarettes can be, and how quickly it affects your body. Scientists at the Oregon Department of Health documented for the first time an hourly buildup of a cancer- causing compound from cigarette smoke in the blood of nonsmokers working in bars and restaurants in the state.
Reporting in the American Journal of Public Health, the researchers found that waitstaff and bartenders working a typical night shift gradually accumulated higher levels of NNK, a carcinogen in cigarette smoke, at the rate of 6% each hour they worked. NNK is known to be involved in inducing lung cancer in both lab rats and smokers.
"We were somewhat surprised by the immediacy of the effect and the fact that we could measure the average hourly increase," says Michael Stark, the lead author of the study and a principal investigator at the Mulmomah County Health Department in Oregon.
The authors are confident that the increases in NNK in the workers they tested most likely came from their exposure to smoke—the study included a control group of similar subjects in restaurants where no smoking was allowed. "There is experimental evidence from studies where you put nonsmokers in a room, blow smoke into the room and measure their artery function, that you see the platelets get sticky, which can cause clots and lead to a heart attack, and the ability of the arteries to dilate decreases very rapidly," says Dr. Matthew McKenna, director of the office on smoking and public health for the Centers for Disease Control.
All of which could mean more time loitering outside buildings and in alleyways for smokers intent on grabbing a puff. Thirteen states now prohibit smoking in restaurants altogether (most of these include bars as well), and while 11 states still put no restrictions on lighting up, individual cities within those states—such as Austin in Texas, for example have passed legislation banning smoking in eating establishments and other public areas.
It’s just getting harder to refute the scientific evidence; in a study done in Scotland several months after that nation instituted a ban on smoking in public places, researchers found that following the ban, bar patrons showed stronger lung capacity and reduced levels of inflammation (a red flag for a number of chronic diseases, including heart disease and asthma). "We made it pretty clear that the science on this is pretty irrefutable," says McKenna. And if smokers have fewer places to smoke, that message may finally get heard. [br] NNK is usually considered to be one of the direct causes of______.
选项
A、asthma
B、lung cancer
C、heart attacks
D、high blood pressure
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3913486.html
相关试题推荐
Researchershaveknownthatsecondhandsmokecanbejustasdangerousfornon
Researchershaveknownthatsecondhandsmokecanbejustasdangerousfornon
Researchershaveknownthatsecondhandsmokecanbejustasdangerousfornon
[originaltext]QuestionNo.6Accordingtosomeresearchers,menwhoeatcooked
ResearchersatMITaredevelopingnewtechnologyforconvertingheatintoli
ResearchersatMITaredevelopingnewtechnologyforconvertingheatintoli
ResearchersatMITaredevelopingnewtechnologyforconvertingheatintoli
I’dliketodiscusssomeofthewaysresearcherstrytomeasurequalityofli
I’dliketodiscusssomeofthewaysresearcherstrytomeasurequalityofli
I’dliketodiscusssomeofthewaysresearcherstrytomeasurequalityofli
随机试题
Hisstomachbeganto______becauseofthebadfoodhehadeaten.A、painB、acheC
Today,theCityofLondonisthebusinesscenterofLondonwhereyoucanfindA、b
一氧化碳检测报警仪的检测范围为( )。A.0~0.1% B.0~0.2%
埋弧焊是工业生产中常用的焊接方法,其主要优点有()。A.热效率较高,工件坡口可较
发生脱位率最高的关节是A、肩关节 B、肘关节 C、髋关节 D、膝关节 E
巴比妥钠盐遇二氧化碳易产生沉淀,原因是该类药物性质属于A.酸碱两性 B.弱碱性
工作期间,若工作负责人必须长时间离开工作现场时,应由()变更工作负责人,履行变更
根据下列资料回答问题。 已知2010年该省限额以下批发和零售企业零售额相比
下列国内机构中,无法提供理财服务的是()。 A.基金公司B.保险公司C.
下列对于环境影响评价的说法正确的是( )。A.环评是编写对规划和建设项目实施后
最新回复
(
0
)