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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Sensors. Quartz thermal converters. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Electrician's Handbook

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Quartz thermal converters - these are devices that use the dependence of the natural frequency of a quartz element on temperature. Are used for measurement of temperatures from-80 to +250 °C.

The operation of these sensors is based on the fact that the dependence of the transducer frequency on temperature and the linearity of the conversion function change depending on the orientation of the cut relative to the axes of the quartz crystal. Sensors are widely used in digital thermometers.

Author: Koryakin-Chernyak S.L.

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Akrikhin against rabies in cows 08.04.2002

Mad cow disease, which has affected many countries, as it turned out, is also transmitted to people, causing them a severe neurological disease - Creutzfeldt-Jakob disease.

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The discovery was made in the same laboratory where Stanley Prusiner, who received the 1997 Nobel Prize for the discovery of prions, works. These proteins, present in any organism, sometimes take on an abnormal configuration, which leads to various diseases, including rabies in cows. Moreover, abnormal prion molecules are able to change the structure of normal ones according to their pattern, which is why the disease occurs. The first experiments were carried out on mice infected with the "wrong" prions. After a few days of human treatment with quinacrine, these pathogenic prions disappeared and were no longer detected in the patient.

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