News tagged with tobacco smoke
Study IDs key protein for cell death, offers way to kill cancer cells by forcing them into programmed-death pathway
When cells suffer too much DNA damage, they are usually forced to undergo programmed cell death, or apoptosis. However, cancer cells often ignore these signals, flourishing even after chemotherapy drugs have ...
Genetics May 14, 2013 | 5 / 5 (9) | 0 |
(Medical Xpress) -- E-cigarettes, or electronic cigarettes, are promoted as a safer alternative to smoking. However, a new study published in the journal Chest, shows that these e-cigarettes cause immediate change ...
Health Jan 06, 2012 | 3.2 / 5 (10) | 18 |
Using marijuana carries legal risks, but a new study shows that the consequences of occasionally lighting up do not include long-term loss of lung function, according to a new study by University of Alabama at Birmingham ...
Health Jan 10, 2012 | 3.8 / 5 (5) | 0 |
(Medical Xpress) -- Though emphasizing that quitting is the best remedy to combat health problems for smokers, Cornell researchers have found a way to make cigarettes less toxic.
Health Jan 03, 2012 | 4 / 5 (4) | 0
(AP) -- Supreme Court Justice Antonin Scalia exercised a rarely used power last fall to let Philip Morris USA and three other big tobacco companies delay making multimillion-dollar payments for a program ...
Other Jun 30, 2011 | 5 / 5 (3) | 0
Tobacco companies knew that cigarette smoke contained radioactive alpha particles for more than four decades and developed "deep and intimate" knowledge of these particles' cancer-causing potential, but they deliberately ...
Health Sep 28, 2011 | 5 / 5 (3) | 10 |
(Medical Xpress) -- Levels of second-hand smoke exposure among non-smoking adults fell by almost 30 per cent after smoke free legislation was introduced in England in 2007, researchers in the Department for ...
Health Dec 14, 2011 | 5 / 5 (3) | 1
Newly published research led by Dr. David Spence of Western University, Canada, shows that eating egg yolks accelerates atherosclerosis in a manner similar to smoking cigarettes. Surveying more than 1200 patients, Dr. Spence ...
Cardiology Aug 13, 2012 | 5 / 5 (3) | 0
(AP)—A federal judge on Tuesday ordered tobacco companies to publish corrective statements that say they lied about the dangers of smoking and that disclose smoking's health effects, including the death on average of 1,200 ...
Health Nov 27, 2012 | 5 / 5 (3) | 3
Smoking marijuana on an occasional basis does not appear to significantly damage the lungs, according to a new study.
Health Jan 12, 2012 | 3.5 / 5 (4) | 0
(Medical Xpress)—Doug Brugge, a professor of public health and community medicine at Tufts, assesses the possible reasons.
Inflammatory disorders Nov 12, 2012 | 4.7 / 5 (3) | 0
While smoking remains legal, the number of smokers is never going to fall significantly, argues public health doctor in a letter to this week's BMJ.
Health Oct 25, 2011 | 5 / 5 (2) | 0
Mayo Clinic researchers have amassed additional evidence that secondhand smoke kills and smoke-free workplace laws save lives. The study will be presented to the American Heart Association's Scientific Sessions on Monday ...
Health Nov 14, 2011 | 5 / 5 (2) | 0 |
New analysis casts doubt on results of tobacco industry studies into safety of cigarette additives
Health Dec 20, 2011 | 5 / 5 (2) | 0 |
From the cherry red tip of a lighted cigarette through the respiratory tract to vital lung cells, the havoc created by tobacco smoke seems almost criminal, activating genes and portions of the immune system to create inflammation ...
Medical research Jan 18, 2012 | 5 / 5 (2) | 0 |
Tobacco smoking is the practice where tobacco is burned and the vapors either tasted or inhaled. The practice began as early as 5000–3000 BC. Many civilizations burnt incense during religious rituals, which was later adopted for pleasure or as a social tool. Tobacco was introduced to the old world in the late 1500s where it followed common trade routes. The substance was met with frequent criticism, but became popular nonetheless. German scientists formally identified the link between smoking and lung cancer in the late 1920s leading the first anti-smoking campaign in modern history. The movement, however, failed to reach across enemy lines during the Second World War, and quickly became unpopular thereafter. In 1950, health authorities again began to suggest a relationship between smoking and cancer. Scientific evidence mounted in the 1980s, which prompted political action against the practice. Rates of consumption from 1965 onward in the developed world have either peaked or declined. They however continue to climb in the developing world.
Smoking is the most common method of consuming tobacco, and tobacco is the most common substance smoked. The argicultural product is often mixed with other additives and then pyrolyzed. The resulting vapors are then inhaled and the active substances absorbed through the alveoli in the lungs. The active substances trigger chemical reactions in nerve endings which hightens heart rate, memory, alertness, and reaction time. Dopamine and later endorphins are released, which are often associated with reward and pleasure. As of 2000, smoking is practiced by some 1.22 billion people. Men are more likely to smoke than women, however the gender gap declines with younger age. The poor are more likely to smoke than the wealthy, and people of developing countries than those of developed countries.
Many smokers begin during adolescence or early adulthood. During the early stages, smoking provides pleasurable sensations and thus serves as a source of positive reinforcement. After an individual has smoked for many years, the avoidance of withdrawal symptoms and negative reinforcement become the key motivations.
For more information about Tobacco smoking, read the full article at
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