Single-ended tube amplifier 15 watts. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Tube Power Amplifiers
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Author: A. Shikhatov; Publication: bluesmobile.com/shikhman
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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 Protein hydrogel for drug delivery
28.09.2019
A team of scientists from the Tandon School of Engineering at New York University (USA) has created the first biocompatible protein-based drug delivery system that is so durable that it can live in the body for more than two weeks and is able to provide a sustained release of drugs. This hydrogel is an important step for the future of drug delivery, tissue engineering and regenerative medicine.
Hydrogels are three-dimensional polymeric networks that turn from solution to gel in response to physical or chemical influences, such as temperature or an acidic environment. In these polymer matrices, like in a capsule, loads such as small molecules can be placed. The new hydrogel consists of one protein domain (section of the protein polypeptide chain) and passes from solution to gel at low temperatures. It exhibits many of the same properties as a synthetic hydrogel. Its main advantage is biocompatibility, so it is best used in biomedicine.
In their experiment, the scientists placed a curcumin molecule in a hydrogel. They found that the hydrogel is stabilized by the molecular entanglement of protein nanofibers, creating a porous matrix capable of binding a small molecule that is afraid of water. Together with this molecule, the entanglement of the fibers increases, which ensures the mechanical integrity and thermal stability of the hydrogel. Due to this, the hydrogel, when it enters the human body, is destroyed more slowly, and the drug is released longer.
Going forward, the researchers will try to develop protein hydrogels that can respond to specific temperatures for various drug delivery applications.
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