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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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Types of biofuels. General provisions. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Alternative energy sources

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Photosynthesis of green plants allows accumulating the energy received from the sun's rays in organic matter, which is synthesized from carbon dioxide, water and some "biogenic" elements of the soil. Every year on Earth, photosynthesis forms about 120 billion tons of dry organic matter, which is energetically equivalent to 40 billion tons of oil (more than 10 times the world level of its consumption).

The chemical energy stored by plants can be used as energy. In general, biomass provides one seventh of the fuel consumed in the world. The energy obtained from biomass is 4 times greater than the total energy of nuclear power plants in the world.

In the countries of the European Union, the share of biomass energy in the total renewable energy production is 55%. The most efficient biomass energy is used in Portugal, Spain, France, Germany, Denmark, Italy. The total biomass resources in Western Europe (in million tons of dry matter per year) are: wood and wood waste - 150, agricultural waste - 250, urban waste - 75, biomass grown specifically on energy plantations - 250 million tons.

Author: Labeish V.G.

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Effect of stress on brain structure 24.07.2023

Recent research by cell biology and anatomy professor Xi-Kwong Jun Liu of Louisiana State University New Orleans reveals the impact of stress on brain structure. These results highlight potential therapeutic targets in the prevention and treatment of related pathologies.

In a mouse study, Liu and her team found that a single stressful event causes rapid and lasting changes in astrocytes, the brain cells responsible for clearing waste products from the brain.

Stressors lead to detachment of the ends of astrocytes from synapses, which serve to transfer information between neurons.

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