What made Hercules (Hercules) famous? Detailed answer

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What made Hercules (Hercules) famous? Detailed answer

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What made Hercules (Hercules) famous?

This mythological Greek demigod performed 12 feats unattainable for mere mortals. For this, he was taken to heaven, where he now shines with the constellation Hercules.

Author: Mendeleev V.A.

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Where was the lightning rod invented long before Franklin?

The Leaning Tower of Nevyansk, located in what is now the Sverdlovsk region, was equipped with a lightning rod a quarter of a century before it was designed by Benjamin Franklin.

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Random news from the Archive

Wearable biosensors from old CDs 30.07.2022

As online music listening services become more popular, CDs are falling into disuse. However, some of them can still be used, since the gold foil contained in them can be used in the production of wearable biosensors.

Although CDs are made primarily from polycarbonate, they contain a thin layer of foil. Most CDs have this aluminum foil, although some use gold.

Because thin layers of gold are also used in flexible skin-attached biosensors, researchers at Binghamton University in New York asked if gold from discs could be used for this purpose.

Under the guidance of graduate student Matthew Brown and Associate Professor Ahyon Koch, a method was developed in which gold CDs were first soaked in acetone for 90 seconds, which destroyed the polycarbonate, weakening the bond between it and the foil, then a sheet of polyimide adhesive tape was applied to the foil. which both foil and gold peeled off from polycarbonate.

Using a commercially available fabric cutting machine, the gold foil and its tape backing were cut into flexible patterns that can be repeatedly applied to and removed from the skin. In combination with other electronics, these biosensors can be used to monitor the electrical activity of the heart and user muscles, as well as to measure lactose, glucose, pH and oxygen levels. All data can be sent to a smartphone via Bluetooth.

The entire fabrication process takes only 20-30 minutes, does not require expensive equipment, and costs about $1,5 per sensor.

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