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CAN A VIRUS MAKE YOU FAT?
Although the idea sounds more like the premise of a B movie than scientific theory two scientists at the University of Wisconsin in Madison believe they've found a virus that causes some people to get fat. Nikhil Dhurandhar and Richard Atkinson reported recently that when they injected a virus known as AD36 into mice and chickens, the animals' body fat increased. Because humans were unlikely to volinteer for such exiperimentation, the scientists decided to test for the presence of antibodies to the virus. Of 154 people tested, about 15 percent of those who were obese had the antibodies. None of the lean people did.
However, the findings don't necessarily prove that the virus caused obesity in the test group. As several virologists have pointed out, obese people may simply be more susceptible to such a virus.
Fonte:
http://news.bbc.co.uk/2/hi/uk_news/scotland/edinburgh_and_east/8639
283.stm (acessado e adaptado em 22/04/10)
Assinale a alternativa que traduz corretamente a expressão: Royal Zoological Society's Pantanal Conservation Initiative (ℓ 19 a 21).
Brazil wants to count trees in the Amazon rainforest
By Channtal Fleischfresser
February 11, 2013
Photo: Flickr/Nico Crisafulli
Brazil is home to roughly 60 percent of the Amazon, about half of what remains of the world’s tropical rainforests. And now, the country has plans to count its trees. A vast undertaking, the new National Forest Inventory hopes to gain “a broad panorama of the quality and the conditions in the forest cover”, according to Brazil’s Forestry Minister Antonio Carlos Hummel.
The census, set to take place over the next four years, will scour 3,288,000 square miles, sampling 20,000 points at 20 kilometer intervals and registering the number, height, diameter, and species of the trees, among other data.
The initiative, aimed to better allocate resources to the country’s forests, is part of a large-scale turnaround in Brazil’s relationship to its forests. While it once had one of the worst rates of deforestation in the world, last year only 1,797 square miles of the Amazon were destroyed – a reduction of nearly 80% compared to 2004.
(www.smartplanet.com. Adaptado.)
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