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Latest Light-harvesting complex Stories

How Did Algae Evolve To Switch Quantum Coherence On And Off?
2014-06-17 03:02:59

University of New South Wales A UNSW-led team of researchers has discovered how algae that survive in very low levels of light are able to switch on and off a weird quantum phenomenon that occurs during photosynthesis. The function in the algae of this quantum effect, known as coherence, remains a mystery, but it is thought it could help them harvest energy from the sun much more efficiently. Working out its role in a living organism could lead to technological advances, such as...

Photosynthetic Megacomplex Studied By Scientists
2013-11-29 06:52:19

Washington University in St. Louis Scientists able to study a photosynthetic complex -- arguably the most important bit of organic chemistry on the planet -- in its complete functioning state When sunlight strikes a photosynthesizing organism, energy flashes between proteins just beneath its surface until it is trapped as separated electric charges. Improbable as it may seem these tiny hits of energy eventually power the growth and movement of all plants and animals. They are literally...

2011-11-30 04:43:34

A biomimetic antenna for gathering sunlight may one day transform solar-powered devices. Sometimes when people talk about solar energy, they tacitly assume that we´re stuck with some version of the silicon solar cell and its technical and cost limitations. Not so. The invention of the solar cell, in 1941, was inspired by a newfound understanding of semiconductors, materials that can use light energy to create mobile electrons–and ultimately an electrical current....

2011-10-19 12:55:53

RUB biologists publish new model for protein transport in plant cells How the light-harvesting complexes required for photosynthesis get to their site of action in the plant cell is reported by RUB biologists in the Journal of Biological Chemistry. The team led by Prof. Dr. Danja Schünemann (RUB working group on the molecular biology of plant organelles) has demonstrated for the first time that a membrane protein interacts with a single soluble protein to anchor the subunits...

Image 1 - Nature Offers Lessons On Harvesting Solar Power
2011-09-23 04:26:01

  Clean solutions to human energy demands are essential to our future. While sunlight is the most abundant source of energy at our disposal, we have yet to learn how to capture, transfer and store solar energy efficiently. According to University of Toronto chemistry professor Greg Scholes, the answers can be found in the complex systems at work in nature. "Solar fuel production often starts with the energy from light being absorbed by an assembly of molecules," said Scholes, the...

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2010-05-11 07:40:45

The future of clean green solar power may well hinge on scientists being able to unravel the mysteries of photosynthesis, the process by which green plants convert sunlight into electrochemical energy. To this end, researchers with the U.S. Department of Energy (DOE)'s Lawrence Berkeley National Laboratory (Berkeley Lab) and the University of California (UC), Berkeley have recorded  the first observation and characterization of a critical physical phenomenon behind photosynthesis known...

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2010-05-03 14:07:06

University of Miami researcher examines the light harvesting properties of purple bacteria in hopes of adapting their natural designs in 'green' technologies for humans Purple bacteria were among the first life forms on Earth. They are single celled microscopic organisms that play a vital role in sustaining the tree of life. This tiny organism lives in aquatic environments like the bottom of lakes and the colorful corals under the sea, using sunlight as their source of energy. Its natural...

2010-02-03 22:18:10

A team of University of Toronto chemists have made a major contribution to the emerging field of quantum biology, observing quantum mechanics at work in photosynthesis in marine algae. "There's been a lot of excitement and speculation that nature may be using quantum mechanical practices," says chemistry professor Greg Scholes, lead author of a new study published this week in Nature. "Our latest experiments show that normally functioning biological systems have the capacity to use quantum...

2010-01-27 10:49:10

As so-called primary producers, plants use solar energy to synthesize the foodstuffs that sustain other forms of life. This process of photosynthesis works in much the same way as the solar panels that supply energy for domestic heating. Like these, plant leaves must cope with variations in the level and quality of ambient light. LMU researcher Professor Dario Leister and his colleagues at LMU Munich have been studying how this is accomplished in the thale cress, Arabidopsis thaliana. "It...

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2009-05-05 08:31:20

An international team of scientists has determined the structure of the chlorophyll molecules in green bacteria that are responsible for harvesting light energy. The team's results one day could be used to build artificial photosynthetic systems, such as those that convert solar energy to electrical energy. A research paper about the discovery was published on May 4, 2009 in the Proceedings of the National Academy of Sciences. The scientists found that the chlorophylls are highly efficient at...


Word of the Day
cruet
  • A vial or small glass bottle, especially one for holding vinegar, oil, etc.; a caster for liquids.
This word is Middle English in origin, and ultimately comes from the Old French, diminutive of 'crue,' flask.
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