Tube amplifier on an EL-34 tube. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Tube Power Amplifiers
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Author: Anatoly Dragaikin; Publication: cxem.net
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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 bio-cement
18.03.2023
Bioengineers from the Technical University of Denmark have figured out how to reduce carbon emissions in the construction industry. Genetically modified bacteria capture carbon dioxide and use it to create calcium carbonate, one of the main elements of cement.
For their production, the researchers used the genes of coral polyps. These animals build "huge buildings" under water - coral reefs - calcareous structures that resemble cement in composition. Bioengineers have transferred genes from these living organisms to bacteria. The modified microorganisms produce an enzyme that binds carbon dioxide to calcium carbonate (limestone).
High temperatures when cement is heated during the manufacturing process lead to the release of carbon dioxide. In 2021 alone, according to the authors of the study, about 2,9 billion tons of carbon dioxide were emitted into the atmosphere during the production of this building material. This is about 7% of the total emissions.
The main idea of the new technology is to create a closed cycle production. Engineers propose using a bioreactor that will capture carbon dioxide released when heated and turn it into limestone. The finished material can be reused for cement production.
At present, the researchers have only tested their technology in the lab. To scale up production, it will be necessary to increase the resistance of bacteria for industrial applications and modify the production of cement. The technology has special requirements for a bioreactor, the bioengineers explain. Modified bacteria, like corals, work in a liquid environment, while the finished material is solid. Therefore, when designing a reactor, it is necessary to create a method for easily transporting finished calcium carbonate from the bioreactor.
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