Thursday, May 29, 2014

Why don’t the highly educated smoke?


It’s well established that adults with college degrees are much less likely to smoke than adults with less 
education, but the reasons for this inequality are unclear. A new Yale study shows that the links between smoking and education in adulthood are in fact explained by characteristics and choices made in adolescence. The study appears in the journal Social Science Research.

The study uses data collected over 14 years to link the smoking and educational histories of adults ages 26 to 29 to their experiences in adolescence. It turns out that differences in smoking by the level of education the person will eventually complete appear as early as age 12, long before that education is obtained, writes author Vida Maralani, assistant professor of sociology at Yale.

Maralani’s study shows that educational disparities in adult smoking are anchored to experiences from early in life. School policies, peers, and expectations about the future measured at ages 13 to 15 predict smoking at ages 26 to 29. 
              “This means that in order to reduce educational inequalities in smoking, we have to figure out exactly which characteristics before age 12 predict that a child will both not take up smoking and stay committed to school,” Maralani said.

Maralani also shows that commonly assumed explanations such as college aspirations and analytical skills do not explain the links between smoking and education in adulthood. Instead, Maralani argues, the families in which kids grow up and children’s non-cognitive skills may matter far more than realized in explaining the robust association between education and smoking in adulthood.

Maralani writes, “Overall, educational inequalities in adult smoking are better understood as a bundling of advantageous statuses that develops in childhood, rather than the effect of education producing better health.”

Funding for this study was provided by the Robert Wood Johnson Foundation Health & Society Scholars program.


Source:
Yale University

Tuesday, May 6, 2014

Retinal Damage may avoid by A Cup of Coffee: Study

Its time to rejoice! for coffee drinkers


 Its time to rejoice! for coffee drinkers, 
The food scientists say that a cup of coffee may helpful in prevention of deterioration of eyesight and possible blindness from retinal degeneration of due to glaucoma.

According to study published in Journal of Agricultural and Food Chemistry (December 2013). A raw coffee , just 1 percent caffeine, but exist 7 to 9 percent Chlorogenic Acid (CLA), an antioxidant that prevent retinal degeneration in mice.

The retina is a thin tissue layer, present at back wall of the eye with millions of light sensitive cells and other nerve (cranial) cells that helps to to organize visual information.. Other than this, it is an metabolically active tissues, demanding high levels of oxygen and making it prone to prone oxidative stress.
The depletion of oxygen lead to production of free radicals and later cause tissue damage and loss of sight.

In process,mice eyes treat with nitric acid(HNO3) may cause generation of free radicals and lead to retinal degeneration, but a mice pretreated with CLA developed no damage to retina.

The study is "important in understanding functional foods, that is, natural foods that provide beneficial health effects," said Chang Y. Lee, professor of food science and the study's senior author.
"Coffee is the most popular drink in the world, and we are understanding what benefit we can get from that," Lee said.

In fact previous studies have shown that coffee also cuts the risk of such chronic diseases as Parkinson's, prostate cancer, diabetes, Alzheimer's and age-related cognitive declines

Since scientists know that CLA and its metabolites are absorbed in the human digestive system, the next step for this research is to determine whether drinking coffee facilitates CLA to cross a membrane known as the blood-retinal barrier. If drinking coffee proves to deliver CLA directly into the retina, doctors may one day recommend an appropriate brew to prevent retinal damage. Also, if future studies further prove CLA's efficacy, then synthetic compounds could also be developed and delivered with eye drops. 





Source:
Journal of Agricultural and Food Chemistry