what's the buzz

A team of researchers at the University of California, San Francisco, led by Stanton A Glantz and scientists at the China Centre for Disease Control and Prevention, analysed the levels of four markers to establish differences in nicotine and carcinogen delivery between the two type of cigarettes.
The research was carried out in a Chinese city where 135 smokers of herbal cigarettes were compared to 143 people who took ‘regular’ tobacco cigarettes.
The examination of the urine samples and evaluating questionnaires showed no major difference in the levels of all four markers: cotinine and trans-3’-hydroxycotinine (two markers of nicotine intake); and total 4-(methylnitrosamino)-1-(3-pyridyl)-butanol and total polycyclic aromatic hydrocarbons.

Healthy mind really does live in a healthy body
A new study has proved an old saying “healthy mind lives in a healthy body”.
Researchers at the University of Gothenburg, Sweden, said regular exercise boosts brain power of young adults. It improves blood flow to the brain that could help build new brain cells. The study involved nearly all Swedish men born between 1950 and 1976.
Scientists discovered that cardiovascular fitness was linked with overall intelligence. The participants also scored on tests of logical, verbal, technical and visuospatial capabilities and even socioeconomic status and educational attainment later in life.
Researcher Georg Kuhn said cardiovascular exercise increases blood flow to the brain, supplying it with more oxygen and nutrients.
Moreover, during exercise, growth factors are produced that could improve brain structure over time. This not only includes more and stronger connections between nerve cells, but also more neurons and supporting cells.

Net addiction doubles teen self harm
High school students who are hooked on to the net are likely to self-harm, according to a new study.
Researchers from the University of Sydney and Notre Dame made the finding after questioning 1,618 students aged 13 to 18 from Guangzhou in China. It was found that one in six reported some form of self-injury in the previous six months like hitting, burning or cutting themselves.
Also, more than one in 10 reported moderate or severe internet addiction. They confessed feeling depressed when they were incapable of accessing the web.
“In recent years, with the greater availability of the internet in most Asian countries, internet addiction has become an increasing mental problem among adolescents,” said the authors in the study.
It added: “Many studies have reported associations between internet addiction, psychiatric symptoms and depression among adolescents”. However, researchers clarified that self-harm did not necessarily mean the intent to kill yourself.

Moist snuff high in carcinogenic content
A new American study has found astonishingly high levels of toxic and carcinogenic substances in smokeless tobacco often called moist snuff. Researchers in Minnesota discovered that moist snuff is contaminated with polycyclic aromatic hydrocarbons (PAHs) that may cause cancer.
Irina Stepanov and colleagues found that the use of moist snuff surged nearly 80 times between 1986-2003, partly due to the belief that it is safer than smoking cigarettes.
However, smokeless tobacco can cause precancerous oral lesions and oral, esophageal, and pancreatic cancer.
The team examined the PAHs in 23 moist snuff samples from the most popular American brands. They found 23 different PAHs in the samples out of which 9 were carcinogens.
Thus, it was established that PAHs are one of largest groups of cancer-causing substances in moist snuff.

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