Transistors KP150 - KP640. Reference data

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The modern world of science and technology is developing rapidly, and every day new methods and technologies appear that open up new prospects for us in various fields. One such innovation is the development by German scientists of a new way to control optical signals, which could lead to significant progress in the field of photonics. Recent research has allowed German scientists to create a tunable waveplate inside a fused silica waveguide. This method, based on the use of a liquid crystal layer, allows one to effectively change the polarization of light passing through a waveguide. This technological breakthrough opens up new prospects for the development of compact and efficient photonic devices capable of processing large volumes of data. The electro-optical control of polarization provided by the new method could provide the basis for a new class of integrated photonic devices. This opens up great opportunities for ... >>

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Random news from the Archive A new way to split water has been developed 28.06.2023 Hydrogen is a promising energy source of the future, provided that its production is environmentally friendly. In addition, hydrogen plays an important role in the production of active ingredients and other significant substances. However, separating water molecules (H2O) into hydrogen gas (H2) and oxygen is a difficult task for chemists because water molecules are very stable. For successful splitting of water, it is necessary to activate it with a catalyst, which simplifies the reaction. A team of researchers led by Professor Armido Studer from the Institute of Organic Chemistry at the University of Münster (Germany) has developed a photocatalytic process in which water is activated through triarylphosphines, and not through transition metal complexes, as is done in most other processes. This groundbreaking approach, published in the journal Nature, opens the door to active radical chemistry research. Radicals are highly active reaction intermediates. The team successfully uses a special intermediate, the phosphine water radical cation, as an activated form of water from which hydrogen atoms can be easily split off and donated to other compounds. The reaction is controlled by light energy. "Our system provides an ideal platform for the study of previously unexplored chemical processes, where the hydrogen atom acts as a reactant in synthesis," says Prof. Studer. Dr. Christian Mück-Lichtenfeld, who carried out the theoretical analysis of activated water, notes: "The hydrogen-oxygen bond in this intermediate product is extremely weak, which allows the transfer of a hydrogen atom to various compounds." Dr. Jingjing Zhang, who is in charge of experimental research, adds: "Hydrogen atoms activated by water can be transferred to alkenes and arenes under mild conditions, in so-called hydrogenation reactions." Hydrogenation reactions are of great importance in the pharmaceutical industry, agrochemistry and materials science. This new method of water splitting, developed by a team of researchers, represents a significant advance in the use of hydrogen as a renewable energy source and an important component in the chemical industry. It opens the door to more efficient and environmentally friendly processes for producing hydrogen and other compounds from water, contributing to the development of a more sustainable and energy efficient technology.

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