Recently, some researchers have suggested that individuals that are overweight live longer. But what is the real key to longevity? Dietitians of Canada (DC) has looked at the evidence and concludes that all individuals, regardless of their weight, can benefit from healthy eating and regular physical activity. Moreover, excess weight is clearly linked to serious health consequences. Prevention and treatment of overweight and obesity remains a priority. Body Mass Index (BMI) is the method of classification recommended for use by Health Canada. It is a standardized index of weight-for-height describing health risks. Evidence suggests individuals classified as underweight (BMI lower than 18.
A chemist at the National Institute of Standards and Technology (NIST) has demonstrated a relatively simple, inexpensive method for detecting and measuring elusive hazards such as concealed explosives and toxins, invisible spoilage in food or pesticides distributed in soil by wind and rain. The prototype method is more sensitive than conventional techniques for detecting traces of these materials, which are polar - like water molecules, having distinct electrically positive and negative ends - and do not readily evaporate. As described in a new paper, * NIST researcher Tom Bruno enhanced a technique called "headspace analysis, " which is the detection and analysis of trace levels of chemical compounds from a solid or liquid that are released into the surrounding atmosphere.
In a new report, University of Illinois professor Barbara H. Fiese urges local, state, and federal governments, businesses, and community leaders to promote family mealtimes as a matter of public policy. "There are few things parents can do that are as effective in protecting their families as taking 18 to 20 minutes to eat together and talk with each other three to five times a week, " said Fiese, a U of I professor of human development and family studies and the director of the U of I's Family Resiliency Center. Research indicates the following benefits of family mealtimes: Teens who eat five or more meals a week with their families are less likely to smoke cigarettes and marijuana and to abuse alcohol.
An animal study at Purdue University has shown that adding ascorbic acid and sugar to green tea can help the body absorb helpful compounds and also demonstrates the effectiveness of a model that could reduce the number of animals needed for these types of studies. Mario Ferruzzi, associate professor of food science and nutrition, adapted a digestion model with human intestinal cells to show that adding ascorbic acid to green tea would increase the absorbability of catechins found in the tea. Catechins, a class of polyphenols common in tea, cocoa and grape, are antioxidants thought to fight heart disease, stroke, cancer, diabetes and other health problems.
Scientists in China are reporting the "intriguing" discovery that a natural plant hormone, applied to crops, can help plants eliminate residues of certain pesticides. The study is scheduled for the Sept. 23 issue of ACS' Journal of Agricultural and Food Chemistry, a bi-weekly publication. Jing Quan Yu and colleagues note that pesticides are essential for sustaining food production for the world's growing population. Farmers worldwide use about 2.5 million tons of pesticides each year. Scientists have been seeking new ways of minimizing pesticide residues that remain in food crops after harvest - with little success. Previous research suggested that plant hormones called brassinosteroids (BRs) might be an answer to the problem.
A study has found that the location of fruit and chocolate items in a canteen can influence purchase of those items; but not in the direction that researchers predicted. Katarzyna Chapman and Professor Jane Ogden of the University of Surrey are presenting the findings of their study today, Friday 11 September, at the British Psychological Society's Division of Health Psychology Annual Conference at Aston University. The researchers changed the location of fruit and chocolate in the university canteen each week over three weeks so that either chocolate or fruit was positioned either close to the tills or to one side of the canteen. Katarzyna Chapman said: "We would have expected sales of products to have gone up when they were found by the checkout - as people may have purchased them on impulse.