Why can fruits ripen on their own? Detailed answer

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Why can fruits ripen on their own? Detailed answer

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Why can fruits ripen on their own?

One of the phytohormones synthesized by plants, ethylene gas, contributes to the ripening of fruits, and it is formed even if the fruit has already been plucked from the branch. Therefore, fruits are harvested unripe before long-term transportation, and they ripen on their own on the road. And for a controlled process, fruits are placed in chambers where ethylene is forcibly supplied. Already ripe fruits release even more gas, which can be used to speed up the ripening of unripe fruits at home, simply by putting them in one bag.

Authors: Jimmy Wales, Larry Sanger

Random interesting fact from the Great Encyclopedia:

Why don't we notice the rotation of the earth?

For a long time, people believed that the Earth was flat as a pancake and was supported by three whales (or three elephants). With the development of science, people's ideas about the Earth have changed. Although we know today that the Earth is moving, it is impossible for a person to notice this, being on its surface. It rotates with it and is too small compared to the huge globe.

We do not notice the rotation of the Earth, but we observe and feel its consequences - the change of day and night. If the Earth did not rotate, then on the side that faces the light, there would always be day, and the opposite side would always be in darkness. But it's good that this doesn't happen. Each point of the Earth is first on the illuminated side, then on the dark side. After 24 hours, everything repeats, since the period of the daily movement of the Earth is 24 hours.

We also do not notice the movement of the Earth around the Sun, but we cannot but see and feel the change of seasons. The Earth revolves around the Sun in 365,25 days. This period of time is called a year.

And together with the Sun and other planets, the Earth moves relative to the Milky Way. The Milky Way moves relative to other galaxies. There is nothing stationary in the universe.

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The interaction of electrons with phonons leads to overheating of the phone 24.10.2016

Researchers at the Massachusetts Institute of Technology (USA) have studied the interactions between particles in modern mobile digital devices - phones, tablets, laptops, etc. They found that the interaction of electrons with thermal particles called phonons can lead to the release of a large amount of heat, and sometimes to overheating.

In their experiments, the scientists used precisely timed laser pulses to measure the interaction between electrons and phonons in a very thin silicon wafer. The researchers found that as the concentration of electrons in silicon increases, they begin to destroy phonons and thereby reduce their ability to dissipate heat. "If phonons are scattered by electrons, they are not as good at removing heat. This creates a problem that we need to solve as chips get smaller," Liao said.

On the other hand, scientists say the same effect could be useful in designing thermoelectric generators that convert heat directly into electrical energy. In such devices, the process of phonon scattering can significantly reduce heat loss, significantly increasing their efficiency.

Interestingly, the researchers first began to observe this effect in silicon, which had an electron density of 1019 units. per cubic centimeter - this figure is comparable to or even lower than in some modern transistors.

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