Putty of Professor Mendeleev. simple recipes

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FACTORY TECHNOLOGIES AT HOME - SIMPLE RECIPES
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Putty of Professor Mendeleev. Simple recipes and tips

Factory technologies - simple recipes

Directory / Factory technology at home - simple recipes

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Here is the recipe Putties of Professor Mendeleev.

Good, clean wax (100 g) is taken and melted over low heat; the melted wax is drained to remove foam and sediment that may form at the bottom of the vessel. Then, rosin (400 g) is gradually added to the melted wax and the mixture is heated, stirring constantly over low heat, until the turpentine smell completely disappears, after which 150 g of mummy and a little linseed oil (5-20 g) are added, depending on which consistency want to have a putty.

One of the properties of this putty is that, due to its cementing properties, it prevents air from penetrating through it.

Author: Korolev V.A.

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Sensor for artificial lens 29.10.2007

German engineers have made a sensor that maintains constant pressure in the artificial lens.

When the lens clouded by cataract is removed from the patient's eye, there is a danger of atrophy of the optic nerve and blindness. To avoid this, you need to maintain a certain level of pressure in the eye. A person has to constantly use drugs and regularly be examined by a doctor. Scientists from the Fraunhofer Institute for Microcircuits and Microelectronic Systems have figured out how to help such patients.

"We built the sensor directly into the artificial lens," says Thomas van den Boom, head of the biohybrid systems group. The sensor consists of two electrodes and a microtransmitter. The top electrode is flexible, the bottom one is rigid. When the pressure changes, the upper sensor moves away from the lower one, which changes the electrical capacitance of the entire system. This change can be measured and the pressure calculated.

The sensor transmits information to the antenna of the receiver located in the temple of the glasses. The measurement results are displayed on their glasses so that a person always knows if the pressure has reached a critical value. An antenna in the temple of the glasses supplies the sensor with energy using electromagnetic radiation. This is understandable: you can place a battery in glasses, but hardly in a lens.

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