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People's memory works better in the dark.

16.05.2017

American scientists have found that human memory works much better with closed eyes.

The researchers set out to find out if human memory really works best with eyes closed and in the dark. A group of volunteers was shown a film they had never seen before. After the end of the viewing, all participants in the experiment recounted in detail the events shown in the film.

The experiment involved dividing people into groups. One of them was allowed to close her eyes while remembering the moments of the film, while the others were not allowed to do so. Comparing the results obtained, it turned out that by closing the eyes, a person activates his memory. All those who did this remembered much more from the material just viewed than the rest. Thus, scientists have proved that indeed, people in the dark or with their eyes closed are able to activate memory and concentrate better.

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New method for creating powerful batteries 08.05.2024

With the development of technology and the expanding use of electronics, the issue of creating efficient and safe energy sources is becoming increasingly urgent. Researchers at the University of Queensland have unveiled a new approach to creating high-power zinc-based batteries that could change the landscape of the energy industry. One of the main problems with traditional water-based rechargeable batteries was their low voltage, which limited their use in modern devices. But thanks to a new method developed by scientists, this drawback has been successfully overcome. As part of their research, scientists turned to a special organic compound - catechol. It turned out to be an important component that can improve battery stability and increase its efficiency. This approach has led to a significant increase in the voltage of zinc-ion batteries, making them more competitive. According to scientists, such batteries have several advantages. They have b ... >>

Alcohol content of warm beer 07.05.2024

Beer, as one of the most common alcoholic drinks, has its own unique taste, which can change depending on the temperature of consumption. A new study by an international team of scientists has found that beer temperature has a significant impact on the perception of alcoholic taste. The study, led by materials scientist Lei Jiang, found that at different temperatures, ethanol and water molecules form different types of clusters, which affects the perception of alcoholic taste. At low temperatures, more pyramid-like clusters form, which reduces the pungency of the "ethanol" taste and makes the drink taste less alcoholic. On the contrary, as the temperature increases, the clusters become more chain-like, resulting in a more pronounced alcoholic taste. This explains why the taste of some alcoholic drinks, such as baijiu, can change depending on temperature. The data obtained opens up new prospects for beverage manufacturers, ... >>

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Turning ordinary material into a magnet 10.08.2020

Ferromagnetism is a phenomenon that occurs in a material when most of the electrons in its atoms rotate in the same direction. In non-magnetic materials, oppositely directed electron spins usually cancel each other out, destroying the magnetic field.

There are not many substances in the world that initially exhibit ferromagnetic properties. The most common of them are well known to us: these are iron, cobalt and nickel, as well as their alloys. That's why when creating electronic devices, the arsenal of engineers is so limited to these trinity.

However, scientists claim that they managed to induce magnetism in a material that was not magnetic before. This is pyrite, "fool's gold" - a mineral that inexperienced miners often mistake for gold nuggets. Using a technique known as electrolytic gating, the researchers endowed it with uncharacteristic properties.

First, they placed pyrite in contact with an electrolyte, after which they applied a weak - only 1 volt - discharge to the connection. This made it possible to move positively charged molecules in the area of ​​contact between pyrite and electrolyte, thereby creating a measurable magnetic force. Interestingly, as soon as the voltage was turned off, the magnetism also disappeared. This feature can help in the design of future generation electronics.

“By applying voltage, we are actually injecting electrons into the material. It turns out that if a sufficiently high concentration of electrons is reached, then the material spontaneously acquires magnetic properties. Previously, all this was discussed only in theory, and we were damn surprised that our method worked. I’m sure that Since the experiment was successful with pyrite, then in the future we will be able to make other materials ferromagnetic," Chris Layton, lead author of the study, shared with the press.

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