Sappho. The most famous aphorisms

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APHORISMS OF FAMOUS PEOPLE
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Aphorisms of famous people. Sappho

Aphorisms of famous people

Free library / Aphorisms of famous people

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Sappho. The most famous aphorisms

If anger rages in your heart, keep your tongue from barking.
If death were a blessing, the gods would not be immortal.
To have beauty means to possess only beauty, but to have virtues means to possess beauty as well.
Love, a voluptuous-bitter monster, from which there is no defense.
None of the people can grow old forever, they can’t bloom forever.

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Water freezing point record broken 01.01.2022

Knowing how and why water turns to ice is essential to understanding a wide range of natural processes. Climate fluctuations, cloud dynamics and the water cycle are affected by the transformation of water and ice, as are animals living in freezing conditions.

Tree frogs, for example, survive the winter on land by allowing their bodies to freeze. This allows them to emerge from hibernation faster than species that hibernate deep underwater without freezing. But ice crystals can rupture cell membranes, so animals that use this technique need to find a way to prevent ice from forming in their cells and tissues. A better understanding of how water freezes can lead to a better understanding of these extreme species.

Although the rule of thumb is that water freezes at 0 degrees Celsius, water can remain liquid in the low temperature range under certain conditions. Until now, it was believed that this range stopped at minus 38 degrees Celsius. A little lower - and the water should freeze. For the first time, researchers have managed to keep water droplets in a liquid state at temperatures down to -44 degrees Celsius.

The opening was aided by very small droplets and a very soft surface. They started with droplets ranging in size from 150 nanometers, slightly larger than an influenza virus particle, to two nanometers, a cluster of just 275 water molecules. This range of droplet sizes has helped researchers unravel the role of size in the transformation of water into ice.

Since it is virtually impossible to observe the freezing process on such a small scale, the researchers used measures of electrical conductivity - since ice is more conductive than water - and light emitted in the infrared spectrum to capture the exact moment and temperature at which droplets transform from water to ice.

It has been found that the smaller the drop size, the colder it must be for ice formation, and for droplets 10 nanometers in size and smaller, the rate of ice formation drops sharply. In the smallest droplets they measured, ice did not form until the water reached -44°C.

The discovery could go a long way in preventing icing of man-made materials such as aviation and power systems, Ghasemi said. If water takes longer to freeze on soft surfaces, engineers can incorporate a mixture of soft and hard materials into their designs to keep ice from forming on those surfaces.

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