نتایج جستجو برای: cigarette
تعداد نتایج: 30900 فیلتر نتایج به سال:
BACKGROUND When lung cancer fears emerged in the 1950s, cigarette companies initiated a shift in cigarette design from unfiltered to filtered cigarettes. Both the ineffectiveness of cigarette filters and the tobacco industry's misleading marketing of the benefits of filtered cigarettes have been well documented. However, during the 1950s and 1960s, American cigarette companies spent millions of...
OBJECTIVE The current study explored the practicality of preventing underage retail cigarette sales and the relationship to cigarette supplies among adolescents. METHOD In Fort Morgan, Colorado, an isolated rural community with below-average socioeconomic status and a large Latino population, supervised teenaged employees repeatedly attempted to buy cigarettes from every store over a 9-month ...
Epigenetic Effects and Molecular Mechanisms of Tumorigenesis Induced by Cigarette Smoke: An Overview
Cigarette smoking is one of the major causes of carcinogenesis. Direct genotoxicity induced by cigarette smoke leads to initiation of carcinogenesis. Nongenotoxic (epigenetic) effects of cigarette smoke also act as modulators altering cellular functions. These two effects underlie the mechanisms of tumor promotion and progression. While there is no lack of general reviews on the genotoxic and c...
This study considers the extent to which daily consumption of cigarettes in young adults varies by age at first cigarette and duration of smoking. Data come from a random sample of 21- to 30-year-old members of a large HMO in the Detroit area. Daily cigarette consumption by current smokers varied by duration of daily smoking: the longer the duration, the higher the number of cigarettes smoked. ...
REVIEWER COMMENTS. Cigarette smoke is a common respiratory irritant that contributes to exacerbations of childhood asthma and rhinitis. This study provided evidence supporting the association between lower secondhand cigarette-smoke exposure and never smoking among young teenagers, which suggests an additional reason to counsel patients and their families regarding the immediate and long-term r...
It has been shown, that smoking results in a lower yield of surfactant associated phospholipids in bronchoalveolar lavage (BAL). Indirect evidence suggests impaired secretion. In the present study, we investigated the influence of cigarette smoke on surfactant secretion in cultured rat alveolar type II cells. Smoke exposure was achieved by bubbling the smoke of four cigarettes through Dulbecco'...
OBJECTIVE To examine the relationship between spending on electronic cigarettes (e-cigarettes) and disease symptoms compared with the relationship between 30-day e-cigarette use and disease symptoms among adult cigarette smokers in the U.S. METHODS We analyzed data from the Tobacco and Attitudes Beliefs Survey which included 533 respondents aged 24+ who were current cigarette smokers and e-ci...
BACKGROUND Despite their growing popularity, the potential respiratory toxicity of electronic cigarettes (e-cigarettes) remains largely unknown. One potential aspect of e-cigarette toxicity is the effect of e-cigarette vapor on lung surfactant function. Lung surfactant is a mixture of lipids and proteins that lines the alveolar region. The surfactant layer reduces the surface tension of the alv...
Cigarette smoking is highly prevalent in people with substance use disorders (SUDs) and is associated with significant physical health problems. Posttraumatic stress disorder (PTSD) is also highly associated with both SUDs and cigarette smoking and may serve as a barrier to smoking cessation efforts. In addition, people with PTSD are more likely to hold positive smoking outcome expectancies (i....
A Randomized Trial of the Effect of E-cigarette TV Advertisements on Intentions to Use E-cigarettes.
INTRODUCTION Adolescents' use of electronic cigarettes (e-cigarettes) and exposure to e-cigarette TV advertising have increased in recent years, despite questions about their safety. The current study tests whether exposure to e-cigarette TV advertisements influences intentions to use e-cigarettes in the future and related attitudes. METHODS A parallel-group randomized controlled experiment w...
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