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Droughts may increase in South America by the end of the century
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A 50% rise in the level of CO2 could reduce rainfall in the Amazon more than deforestation
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Researchers Investigate Remote Control of Enzymes Using Laser Light
Written by AZoOpticsMar 17 2021
The activity of enzymes in industrial processes, laboratories, and living beings can be remotely controlled using light. This requires their immobilization on the surface of nanoparticles and irradiation with a laser.
Near-infrared light can penetrate living tissue without damaging it. The nanoparticles absorb the energy of the radiation and release it back in the form of heat or electronic effects, triggering or intensifying the enzymes catalytic activity. This configures a new field of study known as plasmonic biocatalysis.
Research conducted at the University of São Paulo s Chemistry Institute (IQ-USP) in Brazil investigated the activity of enzymes immobilized on gold nanoparticles controlled by infrared laser irradiation. An article reporting the results is published in
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IMAGE: Manipulator arm on the HyBIS hybrid remotely operated vehicle collecting crust samples from the Rio Grande Rise view more
Credit: Bramley Murton
The abundant biological and mineral diversity of the Rio Grande Rise, a seamount in the depths of the Atlantic Ocean about 1,500 km from the coast of Brazil, is probably due to a great extent to little-known microscopic creatures.
Researchers affiliated with the University of São Paulo s Oceanographic Institute (IO-USP), collaborating with colleagues at the UK s National Oceanography Center, investigated the microorganisms inhabiting the seamount s ferromanganese crusts and concluded that bacteria and archaea are probably responsible for maintaining the abundant local life, besides being involved in the process of biomineralization that forms the metals present in the crusts.