Photosynthesis - Energy efficiency of photosynthesis: ..

derived what is called Planck's constant (universally referred to by the symbol h) to demonstrate his theory of the quantization of energy. He realized that the light energy given off by burning bodies varies with the frequency of their vibrating atoms, and produced the formula E = nvh, n = 1, 2, 3, . . . .

The quantum efficiency of photosynthesis in macroalgae …

The quantum efficiency of photosynthesis in macroalgae and submerged ..

The quantum efficiency of photosynthesis ..

Quantum physics explains how the light energy of a photon is absorbed by the right sort of receptor, kicking an electron loose and commencing the process of photosynthesis by creating a source of potential energy between the separated electron and the hole it formerly occupied. Gaining and losing electrons "is the name of the game in redox reactions," said Wrighton, who added, "It has long been known that the photoexcited molecules are both more potent oxidants and more potent reductants than the ground electronic state" (). When a photon is absorbed to create an electron and a hole, something thermodynamically unstable is produced, and there's always the tendency for the electron and the hole to recombine. Back electron transfer is, metaphorically, a short circuit that bleeds the potential energy of the charge separation before it can aggregate at a distant site within the system and be put to use.

and efficiency of artificial photosynthesis

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Harrison MT, Edwards EJ, Farquhar GD, Nicotra AB, Evans JR (2009) Nitrogen in cell walls of sclerophyllous leaves accounts for little of the variation in photosynthetic nitrogen-use efficiency.

Osaka-based Panasonic has come up with an artificial photosynthesis system that achieves an energy conversion efficiency of 0.3 percent.

Photosynthetic efficiency - Wikipedia

“Artificial photosynthesis is the same as photosynthesis in terms of using solar energy to produce oxygen with water. But we are trying to produce something that is useful and in high demand,” said Akihiko Ono, a researcher at the organic materials laboratory of Toshiba’s Corporate Research and Development Center.

lifetime and a 95% quantum efficiency for one ..

What next? All of that captured light energy needs to be converted into a different form; that's the whole point of photosynthesis. We aren't quite ready for that, though. The light harvesting complex just collects the light; the nearby reaction center is where the conversion process begins. You can think of the light harvesting complex as an antenna or as a funnel that sends energy to the reaction center, where the process of converting the energy into ATP (and, later, carbohydrates) will begin.

Wrighton and other chemists around the world are trying to use what has been learned about photosynthesis in nature to create a

Atomic-Scale 3-D Images Help Unravel the Mysteries Of Photosynthesis

The effect is to harvest light from a slightly broader range of the visible spectrum. That makes for a more efficient process. Because sunlight contains wavelengths that range all across the visible spectrum (and beyond), the more of these wavelengths that can be captured, the more efficient photosynthesis can be.

light phase of photosynthesis and the efficiency of the ..

Other biomolecular processes such as thetransfer of electrons within macromolecules (like in reaction centres in photosyntheticsystems), the structural change of a chromophore upon absorption of photons(like in vision processes) or the recognition of a molecule by another (as inolfaction processes), are influenced by specific vibrational motions. The results of this research therefore suggest that acloser examination of the vibrational dynamics involved in these processescould provide other biological prototypes exploiting truly non-classicalphenomena.

Quantum mechanics explains efficiency of photos..

If artificial photosynthesis devices with that kind of efficiency were set up on a parcel of land measuring 10,000 sq. meters, it would be capable of producing 3,700 liters of methanol, the company estimates.