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Thinness genes

20.04.2012

Geneticists from France, Switzerland and England, having examined the genomes of several tens of thousands of people, found on the 16th chromosome a group of 28 genes that determine the weight of a person.

Normally, each of us has two such groups, received from the father and mother. But in some, as a result of a mutation, all these 28 genes are present in triplicate. Such people are 20 times more likely than average to be abnormally thin. After that, geneticists studied the chromosomes of 3500 obese people.

It turned out that none of them had a triple set of "thinness genes", but some of these genes had only one copy. Those with this mutation are 43 times more likely to be severely obese than normal. True, the 16th chromosome is to blame for only one percent of all cases of obesity.

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Passenger power 13.07.2009

At one of the Tokyo stations, ceramic piezoelectric elements were installed in a 25 square meter section of the floor so that passing crowds of passengers would generate energy.

If the experiment is successful, the entire station will be equipped with piezoelectric elements, and passengers will be powered by ticket vending machines, turnstiles that allow passengers to enter the platform, and information boards. True, for this it is necessary to create a system of batteries that store energy during peak hours and give it away when there are few passengers.

On average, 400 thousand people pass through the station chosen for the experiment per day, and it is believed that the energy generated by the "energy floor" would be enough to burn a 25-watt light bulb for a day.

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