Low frequency amplifier on a TDA1514 chip. Encyclopedia of radio electronics and electrical engineering
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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 Why you don't want to eat after exercising
23.04.2018
Those who are actively involved in sports or fitness know that after you give your best on the simulators, you don’t want to eat for a very long time. Obviously, after exercise, some mechanism is activated that suppresses appetite and hunger. But what is this mechanism?
Scientists from the Albert Einstein College of Medicine have suggested that it's all about the increase in body temperature - we warm up quite a lot due to physical activity.
Thermoregulation, like appetite, depends on the hypothalamus, a small area in the brain that controls a variety of physiological processes. Each process has its own group of nerve cells, but maybe the hypothalamic neurons that regulate eating behavior also sense temperature?
Cells that suppress appetite are found in the arcuate nucleus of the hypothalamus; their peculiarity is that they are able to directly feel the hormones and other substances that float in the blood (the brain, as we know, is protected from direct contact with the blood by the blood-brain barrier).
To find out if these neurons can respond to heat, the researchers treated them with the alkaloid capsaicin, which is found in hot peppers and which acts on heat receptors (which is why we feel how the pepper burns). Two-thirds of the cells of the arcuate nucleus felt capsaicin - that is, they have heat receptors and they are active.
From experiments with cells, they moved on to experiments on mice. When the animals were injected with a burning substance directly into the hypothalamus, into the region of these same neurons, the mice lost their appetite for 12 hours - they continued to eat, but ate noticeably less than usual. If heat receptors on neurons were blocked, then capsaicin did not suppress appetite.
When mice were run on a treadmill for 40 minutes, their temperature rose rapidly (including in the zone of the arcuate nucleus of the hypothalamus) and remained elevated for an hour - and mice after "fitness" also ate half as much as mice that did not exercise. But if mice with disabled thermal receptors on neurons ran on a treadmill, then they did not have any changes in their appetite - physical education did not affect their appetite.
That is, the hypothesis was confirmed: brain cells that suppress appetite really respond to heat. (To explain why this is necessary, for example, you can do this: a lot of physical activity happens when you have to run away from someone, and the desire to eat a hearty meal here would be inopportune.)
Most likely, the same mechanism has remained with us, and here you can come up with different options for how to use it to reduce weight. Although what is there to come up with - you just need to go to the gym.
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