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
2023-12-23
60
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/3298926.html
相关试题推荐
Researchersallovertheworldhavebeenseekingfordetermininghowearlyinfan
Nowresearchersaredirectingmoreattentiontothesocialandculturalimpetus
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
Someconsumerresearchersdistinguish【C1】______"rational"motivesand"emot
随机试题
Mylittlebrotheristooyoung______gotoschool.A、toB、thatC、nottoA本题考查固定句型。
Formanyyoungpeople,thelate1960swasaperiodofrevoltagainstthemor
HowtoGettheMostfromYourCollegeProfessorI.Dailyroutineincollege—Get
[audioFiles]audio_eufm_j99_001(20082)[/audioFiles]A、Shedidn’tunderstandwhat
以下关于光纤特性的叙述中,不正确的是()。A.光纤传输信号传输损耗小 B.光
胎先露的指示点,以下哪项不恰当A.臀先露--臀部 B.枕先露--枕骨 C.额
最特异的诊断肺结核的方法是A:肺功能检查 B:X线检查 C:结核菌素试验
下列不是会员制期货交易所的是()。A.上海期货交易所 B.大连商品交易所
A.CPI记分1 B.CPI记分2 C.CPI记分3 D.CPI记分4
A.摆动性 B.通用性 C.连续性 D.简并性 E.特异性UGC、UGU
最新回复
(
0
)