All Articles Tagged As: photosynthesis
Photosynthetic organisms need to cope with a wide range of light intensities, which can change over timescales of seconds to minutes. Too much light can damage the photosynthetic machinery and cause cell death. Scientists at the Carnegie Institution were part of a team that found that specific proteins in algae can act as a safety valve to dissipate excess absorbed light energy before it can wreak havoc in cells.
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Structure of artificial light harvesting antenna determined
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 | A large, international collaboration between Arizona State University, the University of California San Diego and the University of British Columbia, has come up with a surprising twist to photosynthesis by swapping a key metal necessary for turning sunlight into chemical energy. ...> Full Article |
 | An international science team has determined the structure of chlorophyll molecules in green bacteria, which are super-efficient at harvesting light energy. Because the interactions that lead to the assembly of the chlorophyll molecules are rather simple, so they provide good models for designing artificial systems. The research one day could be used to build artificial photosynthetic systems, such as those that convert solar energy to electrical energy. ...> Full Article |
Engineers at Oregon State University have discovered a way to use an ancient life form to create one of the newest technologies for solar energy, in systems that may be surprisingly simple to build compared to existing silicon-based solar cells. The secret: diatoms.
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Researchers at Washington University in St. Louis have figured out the orientation of a protein in the antenna complex to its neighboring membrane in a photosynthetic bacterium, a key find in the process of energy transfer in photosynthesis. Robert Blankenship, Ph.D., Markey Distinguished Professor of biology and chemistry in Arts & Sciences, led a team that for the first time combined chemical labeling with mass spectroscopy to verify the orientation.
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Photosynthesis produces the food that we eat and the oxygen that we breathe -- could it also help satisfy our future energy needs by producing clean-burning hydrogen? Researchers studying a hydrogen-producing, single-celled green alga, Chlamydomonas reinhardtii, have unmasked a previously unknown fermentation pathway that may open up possibilities for increasing hydrogen production.
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 | Berkeley Lab researchers create a nano-sized photocatalyst for artificial photosynthesis ...> Full Article |
Scientists from Queen Mary, University of London, have discovered that an ancient system of communication found in primitive bacteria, may also explain how plants and algae control the process of photosynthesis.
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 | It's all in the wiring: Biocomponents at the heart of an artificial photosystem ...> Full Article |
Using two simultaneous light-based probing techniques at the US Department of Energy's Brookhaven National Laboratory, a team of researchers has illuminated important details about a class of enzymes involved in everything from photosynthesis to the regulation of biological clocks.
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Researchers have used chemicals found in plants to replicate a key process in photosynthesis paving the way to a new approach that uses sunlight to split water into hydrogen and oxygen.
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 | Scientists mimic essence of plants' energy storage system ...> Full Article |
 | chemists see near-term promise in mimicking photosynthesis ...> Full Article |
Plants have an ambivalent relationship with light. They need it to live, but too much light leads to the increased production of high-energy chemical intermediates that can injure or kill the plant.
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Damage to plants seems to regulate its ability to trap energy from sunlight
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 | In a study of the molecular mechanisms by which plants protect themselves from oxidation damage should they absorb too much sunlight during photosynthesis, a team of researchers has discovered a molecular "dimmer switch" that helps control the flow of solar energy moving through the system of light harvesting proteins. This discovery holds important implications for the future design of artificial photosynthesis systems that could provide the world with a sustainable and secure source of energy. ...> Full Article |
 | Researchers report on the energy-transferring functions within the Fenna-Matthews-Olson photosynthetic light-harvesting protein, a pigment-protein complex in green sulfur bacteria that serves as a model system because it consists of only seven well-characterized pigment molecules ...> Full Article |
Scientists synthesise stable catalyst for water oxidation
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Research could lead to more efficient, cleaner hydrogen production
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In a technical advance that could allow researchers to watch cells as they act during the process of photosynthesis, scientists have developed a method that extends the power of fluorescence-mediated bio-imaging to see discrete pigments inside live cells of bacteria.
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Plants trees and algae do it. Even some bacteria and moss do it, but scientists have had a difficult time developing methods to turn sunlight into useful fuel. Now, Penn State researchers have a proof-of-concept device that can split water and produce recoverable hydrogen.
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 | If we wanted to create the ideal environmentally friendly energy source, it would be a fuel that is easy and economical to produce, and one that does not pollute the air when burned. That is exactly what researchers at ASU intend to develop in a new program that uses bacteria and sunlight to generate hydrogen, a clean fuel that produces no greenhouse gases. ...> Full Article |
 | Singlet oxygen, a byproduct of the photosynthetic process by which certain cells convert sunlight into energy, is a highly toxic and reactive substance that tears cells apart. Now scientists have become the first to solve the structure of a protein complex that protects these cells from singlet oxygen. The findings not only advance knowledge of how cells sense the presence of singlet oxygen, but also how they turn on critical genes to defend themselves from its effects. ...> Full Article |
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