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Latest Photosynthetic reaction centre Stories

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...

Lab-made Complexes Absorb More Sunlight
2013-08-21 15:47:02

Washington University in St. Louis A ring of protein and pigments, half synthetic and half natural, can be used to quickly prototype light-harvesting antennas that absorb more sunlight than fully natural ones In diagrams it looks like a confection of self-curling ribbon with bits of bling hung off the ribbon here and there. In fact it is a carefully designed ring of proteins with attached pigments that self-assembles into a structure that soaks up sunlight. The scientists who made it...

2013-07-10 15:19:39

Photosynthesis takes place in specialized membrane systems, made up of stacked disks linked together by unstacked planar leaflets. An LMU team has now identified a protein that tucks the membrane in at the edge of each stack. By making use of sunlight to generate molecular oxygen and other energy-rich chemical compounds that other organisms can utilize as nutrients, photosynthesis provides the basis for almost all life on Earth. Radiant energy from the Sun is captured by pigment-protein...

Quantum Secret In Photosynthesis Uncovered
2013-06-21 11:20:36

ICFO-The Institute of Photonic Sciences The efficient conversion of sunlight into useful energy is one of the challenges which stand in the way of meeting the world's increasing energy demand in a clean, sustainable way without relying on fossil fuels. Photosynthetic organisms, such as plants and some bacteria, have mastered this process: In less than a couple of trillionths of a second, 95 percent of the sunlight they absorb is whisked away to drive the metabolic reactions that provide...

2013-04-22 09:57:07

University of Chicago researchers have created a synthetic compound that mimics the complex quantum dynamics observed in photosynthesis and may enable fundamentally new routes to creating solar-energy technologies. Engineering quantum effects into synthetic light-harvesting devices is not only possible, but also easier than anyone expected, the researchers report in the April 18 edition of Science Express. The researchers have engineered small molecules that support long-lived quantum...

2012-07-03 10:24:17

Research on the Water Oxidation Reaction in Plants and Bacteria Helps Solve an Important Piece of the Solar Energy Conversion Puzzle; Represents a Major Step Toward a New Generation of Photovoltaics New research led by chemists in the Baruch ´60 Center for Biochemical Solar Energy Research at Rensselaer Polytechnic Institute is seeking to detail the individual steps of highly efficient reactions that convert sunlight into chemical energy within plants and bacteria. In a paper...

2012-05-24 19:40:04

Quantum physics and plant biology seem like two branches of science that could not be more different, but surprisingly they may in fact be intimately tied. Researchers at the U.S. Department of Energy's (DOE) Argonne National Laboratory and the Notre Dame Radiation Laboratory at the University of Notre Dame used ultrafast spectroscopy to see what happens at the subatomic level during the very first stage of photosynthesis. "If you think of photosynthesis as a marathon, we're getting a...

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....

Miscanthus-sun-Web
2011-09-24 09:02:06

International Panel of Scientists Point the Way Forward Photosynthesis is one of nature´s finest miracles. Through the photosynthetic process, green plants absorb sunlight in their leaves and convert the photonic energy into chemical energy that is stored as sugars in the plants´ biomass. If we can learn from nature and develop an artificial version of photosynthesis we would have an energy source that is absolutely clean and virtually inexhaustible. “Solar energy is...

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...