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glass medicine

18.07.2003

British dentists have developed a new way to prevent caries.

On one of the molars at the back, so as not to interfere, the doctor glues a two-millimeter grain of glass of a special composition that can dissolve very slowly in saliva. Fluorine ions are introduced into the glass. Gradually released, they protect tooth enamel from caries.

A side effect of this remedy was also revealed: it eliminates the sensitivity of the teeth to too cold or too hot food, which is characteristic of many. The glass "bead" should be replaced every two years.

Soluble glass will find application in animal husbandry. A glass tablet with trace elements necessary for the animal, such as copper or cobalt, is allowed to be swallowed by a cow. The tablet enters one of the sections of the complex stomach and, gradually dissolving, releases the necessary trace elements.

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Etiquette is in the genes 29.04.2012

Why do some people become donors or treat their neighbors with delicious pies, while others spread gossip and always swear? Scientists from the University of Buffalo and the University of California believe that the cause is a combination of genes and hormones.

It is believed that the hormones oxytocin and vasopressin affect how people relate to each other. Laboratory tests have shown that people communicate better and excel at economic games when they inhale an aerosol containing oxytocin. However, no large-scale studies on this topic have been conducted so far.

In the new study, instead of injecting oxytocin, scientists focused on the biology of hormones. Hormones work by binding to receptors in cells. These receptors have different forms, for example, the oxytocin receptor has two forms, and vasopressin has even more.

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It turned out that people who look at the world from a negative point of view and are less likely to help others do not have a form of receptor associated with kindness and a positive attitude towards people. The "positive" version of the gene allows you to overcome the feeling that the whole world is filled with danger, deceit and violence.

The results of the study do not indicate a direct relationship between genes and social behavior - most of the links between DNA and social behavior are very complex and much deeper than the form of receptors. However, generosity, caring, a sense of civic duty, etc. associated with certain genes, and this can be detected. It is possible that in the future, a person's potential integrity can be detected with a simple DNA test.

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