Washington, Apr 7: Using insecticides-chemical or biological-to kill older mosquitoes may be a more sustainable way of controlling malaria, according to entomologists.

Andrew Read, a Penn State professor of biology and entomology, says that the new approach to attack older mosquitoes may lead to evolution-proof insecticides that never become obsolete.

London, Apr 7: Unlike men, women do not engage in risky financial decisions when given testosterone, Swedish researchers have shown.

Although earlier studies have found correlations between testosterone levels and risky behaviour in men, including one that found that male securities traders with more testosterone in their saliva made riskier financial decisions, the latest study has suggested that women are a safer pair of hands on the stock-market trading floor than men when given the hormone.

Washington, Apr 7 : It might not come as a surprise to most wives, mothers and female workers, but a new study has found that women cope better under strain than men.

What''s more, people of either sex with certain genetic advantages handle stress nicely.

Some people appear to be resilient to difficult conditions, whereas others react adversely to such challenges, incurring a range of physical and mental disorders. Much research has shown that the way in which the brain and body adapt to acute and chronic stress are critical for physical and mental health.

Washington, April 7 : Kids lacking an ability to regulate their behaviour, or to delay gratification in exchange for a larger reward, are more likely to become overweight by their pre-teen years, according to a study.

"Obesity in childhood and adolescence appears to track into adulthood, increasing the risk of developing cardiovascular disease, diabetes mellitus and certain cancers in adulthood," the authors write as background information in one of the articles.

Washington, April 7: Children and adolescents can be prevented from consuming an average of 235 excess calories per day by replacing consumption of sugar-sweetened beverages (SSBs) with water, according to a study.

Such a replacement may prove very helpful in dealing with childhood overweight and obesity, and address dental cavities and other health problems associated with added sugar, say the study’s authors.

This lifestyle change will have no detrimental effects on nutrition, they add.

Washington, April 7: Mario Capecchi, Nobel Laureate for Medicine in 2007, has announced the invention of a technique to reveal the stem cells camouflaged in the pancreas.

The achievement made in collaboration with Eugenio Sangiorgi, a researcher from the Catholic University of Rome, is important because, to date, scientists don''t have a method to distinguish a priori between a stem cell and any other cell in the same tissue.

“We can only infer that a cell really is a stem cell by observing its behaviour," says Sangiorgi.