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November 13, 2019

November 2019 Quiz

November 2019 Quiz
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LSG-manganese capacitors – Energy storage and conversion

Supercapacitors (also known as ultracapacitors, electrochemical capacitors, or double-layer capacitors) are electrochemical devices that store and release charge and deliver high power densities over short periods of time. Their ability to store electrical energy efficiently and release electrical energy very quickly makes them ideally suited for applications where short-time backup...
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Chromate in toys, leather and drinking water

Chromate is allergenic, carcinogenic and extremely toxic. It is therefore subject to strict monitoring. It is present in different concentrations in drinking water, toys, textiles, leather and many other materials.
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Sodium in dairy products

The sodium content of beverages is usually determined indirectly through a precipitation reaction with silver nitrate. This approach assumes that the chloride ions are present in a molar ratio of 1:1 with the sodium ions, which is not always the case. On the other hand, established methods for the direct...
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