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What are children afraid of? Detailed answer

Big encyclopedia for children and adults

Directory / Big encyclopedia. Questions for quiz and self-education

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Did you know?

What are children afraid of?

1) darkness, terrible dreams,

2) punishment, shouting,

3) monsters, ghosts, fairy-tale characters,

4) loneliness,

5) death of one's own and parents,

6) hooligans, bandits,

7) injections, doctors.

Author: Mendeleev V.A.

 Random interesting fact from the Great Encyclopedia:

What is the difference between white rhinos and black rhinos?

Black and white rhinoceroses got such names unjustifiably - they can all be dark gray, and light gray, and brown. The error arose due to the fact that the British colonists took the Dutch "wijd" for the word "white" - "white", but it should have been "wide" - "wide", since this species has a wide mouth. And since white rhinos appeared, the species with a narrow mouth was called the black rhinoceros.

 Test your knowledge! Did you know...

▪ How does a rattlesnake rattle?

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See other articles Section Big encyclopedia. Questions for quiz and self-education.

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Latest news of science and technology, new electronics:

Machine for thinning flowers in gardens 02.05.2024

In modern agriculture, technological progress is developing aimed at increasing the efficiency of plant care processes. The innovative Florix flower thinning machine was presented in Italy, designed to optimize the harvesting stage. This tool is equipped with mobile arms, allowing it to be easily adapted to the needs of the garden. The operator can adjust the speed of the thin wires by controlling them from the tractor cab using a joystick. This approach significantly increases the efficiency of the flower thinning process, providing the possibility of individual adjustment to the specific conditions of the garden, as well as the variety and type of fruit grown in it. After testing the Florix machine for two years on various types of fruit, the results were very encouraging. Farmers such as Filiberto Montanari, who has used a Florix machine for several years, have reported a significant reduction in the time and labor required to thin flowers. ... >>

Advanced Infrared Microscope 02.05.2024

Microscopes play an important role in scientific research, allowing scientists to delve into structures and processes invisible to the eye. However, various microscopy methods have their limitations, and among them was the limitation of resolution when using the infrared range. But the latest achievements of Japanese researchers from the University of Tokyo open up new prospects for studying the microworld. Scientists from the University of Tokyo have unveiled a new microscope that will revolutionize the capabilities of infrared microscopy. This advanced instrument allows you to see the internal structures of living bacteria with amazing clarity on the nanometer scale. Typically, mid-infrared microscopes are limited by low resolution, but the latest development from Japanese researchers overcomes these limitations. According to scientists, the developed microscope allows creating images with a resolution of up to 120 nanometers, which is 30 times higher than the resolution of traditional microscopes. ... >>

Air trap for insects 01.05.2024

Agriculture is one of the key sectors of the economy, and pest control is an integral part of this process. A team of scientists from the Indian Council of Agricultural Research-Central Potato Research Institute (ICAR-CPRI), Shimla, has come up with an innovative solution to this problem - a wind-powered insect air trap. This device addresses the shortcomings of traditional pest control methods by providing real-time insect population data. The trap is powered entirely by wind energy, making it an environmentally friendly solution that requires no power. Its unique design allows monitoring of both harmful and beneficial insects, providing a complete overview of the population in any agricultural area. “By assessing target pests at the right time, we can take necessary measures to control both pests and diseases,” says Kapil ... >>

Random news from the Archive

A new way to recycle plastic 05.10.2021

Engineers from the Federal Polytechnic School of Lausanne (EPFL, Switzerland) have developed a new method for plastic recycling based on polymer reassembly.

Proteins are one of the main organic compounds that make up our world. Like DNA, they form part of the polymer family; proteins are long chains of molecules or monomers known as amino acids. The sequence of these links makes up the structure of the protein and, therefore, determines its properties. In nature, protein chains are broken down into their constituent amino acids, and cells join these amino acids together to form new proteins.

In the laboratory, scientists first tried to replicate this natural cycle outside of living organisms. They took proteins and divided them into amino acids. Then they put the amino acids into a cell-free biological system that assembled new proteins with completely different structures and functions. "It is important to note that when you break down and assemble proteins in this way, the quality of the proteins produced is exactly the same as the newly synthesized protein. Indeed, you are creating something new," the authors of the work add.

What is the link between protein assembly and plastic recycling? Because both compounds are polymers, the mechanisms that are natural to proteins can be applied to plastics as well. While this analogy may seem promising, the scientists warn that the development of such techniques won't happen overnight. This will require a radically different way of thinking. Polymers are strands of pearls, but synthetic polymers are mostly pearls of the same color, and when the color is different, the color consistency rarely matters. In addition, there is no efficient way to assemble synthetic polymers from pearls of different colors by controlling their sequence.

This new approach to plastic recycling seems to be the only one that truly fits the circular economy postulate.

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