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What reverse photosynthesis is all about

Scientists claim reverse photosynthesis ..

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'Reverse Photosynthesis' Produces Chemicals, Energy

It might seem complicated but reverse photosynthesis is pretty basic. You take the carbohydrates that plants and bacteria normally produce in photosynthesis and use light energy to convert them enzymatically into smaller products. These substances could be the most useful substances that we need in industry such as biofuels and the monomers for plastics production. It does seem that the oil industry could finally be displaced by mere enzymes.

Can Artificial Photosynthesis Reverse Climate Change?

The future is certainly renewable, but are we too late to prevent future centuries’ problems of global warming- and the rest! Here are some current US solutions to waste and warming for you to enjoy---there are some ads in this piece but we’ve allowed them for one blog only.

Reverse photosynthesis turns plants into biofuels

Plants burn these carbohydrates (and other products derived from them) through the process of respiration, the reverse of photosynthesis.

The whole process has been obvious to us, but The skill of this research is in winkling out how the reversing can be accomplished in a relatively efficient way. The efficiency lies in of a 100-fold increase in the enzyme activity which the authors note has never been observed before. Obviously these neglected areas of our biology can gift us immeasurable benefit if he potential of Professor Felby’s research is fulfilled. The suggestion is that this light-induced oxidation process may even be quite natural in our global Carbon Cycle, despite our ignorance of such a process to date.

Researchers at the University of Copenhagen have discovered a natural process they describe as reverse photosynthesis. In the process, the energy in solar rays breaks down, rather than builds plant material, as is the case with photosynthesis. The sunlight is collected by chlorophyll, the same molecule as used in photosynthesis. Combined with a specific enzyme the energy of sunlight now breaks down plant biomass, with possible uses as chemicals, biofuels or other products, that might otherwise take a long time to produce. By increasing production speed while reducing pollution, the discovery has the potential to revolutionize industrial production. The research results have now been published in Nature Communications.

Reverse photosynthesis is an ultra-efficient biofuel …

Chemically speaking, respiration is photosynthesis in reverse, as you can see in this equation:

In respiration energy is released fromsugars when electrons associated with hydrogen are transported to oxygen (theelectron acceptor), and water is formed as a byproduct. The mitochondriause the energy released in this oxidation in order to synthesize ATP. Inphotosynthesis, the electron flow is reversed, the water is split (not formed),and the electrons are transferred from the water to CO2 and in theprocess the energy is used to reduce the CO2 into sugar. Inrespiration the energy yield is 686 kcal per mole of glucose oxidized to CO2,while photosynthesis requires 686 kcal of energy to boost the electrons from thewater to their high-energy perches in the reduced sugar -- light provides thisenergy.

The citric acid cycle [TCA cycle] (oxidative) is one of the main cycles used by all aerobic organisms to generate energy by the oxidation of pyruvate. The rTCA reverses the reactions of the oxidative citric acid cycle. The oxidative TCA is used to generate energy through oxidation of acetate which is derived from different substances like fats, carbohydrates and proteins and procues carbon dioxide and ATP. The reductive citric acid cycle runs in reverse. That means it uses two molecules of carbon dioxide and ATP to generate carbohydrates, fats and proteins from acetyl-CoA. It is used for autotrophic growth ().
The green sulfur bacterium is the first organism where this cycle could be observed by Evans, Buchanan and Arnon 1966 (Arnon-Buchanan Cycle) (). It has also been found in anaerobic and microaerobic bacteria.
There are three reactions of the oxidative citric acid cycle which are known as irreversible (). The establishment of the reverse cycle from an oxidative TCA requires the replacement of three enzymes: The succinate dehydrogenase has to be replaced by the fumarate reductase, the NAD+-dependent 2-oxoglutarate dehydrogenase has to be replaced by the ferredoxin-dependent 2-oxoglutarat synthase and the citrate synthase has to be replaced by the ATP citrate lyase. The educt, Acetyl-CoA, of a constructed reverse TCA cycle which is further carboxylated to pyruvate is used by the cell. The electrons needed for the rTCA reactions are donated by ferredoxin and NAD(P)H and requires two ATP to form one pyruvate molecule.
We decided not to work with this cycle because we would have we had to use anaerobic cultivation conditions which we tried to avoid because of a lack of materials and equipment for this purpose.

Reverse Photosynthesis Turns Plants Into Biofuels and …
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  • Reverse Photosynthesis—New Biotech ..

    18/05/2010 · Best Answer: Yes, aerobic cellular respiration is the reverse of photosynthesis

  • Is photosynthesis reaction reversible? - Updated 2017

    Researchers at the University of Copenhagen have discovered a natural process they describe as reverse photosynthesis

  • Is photosynthesis reaction reversible or not

    there has been more oxygen put into the atmosphere and carbon dioxide removed by photosynthesis than the reverse…

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How is photosynthesis the reverse reaction of aerobic respiration

Reverse photosynthesis does not produce carbon dioxide and water as you might expect. Here is an exposition of how could solve the energy needs of a future generation! It simply uses the enzymes that would make the reaction work in the direction of polysaccharides and allows the power of light energy to force the reaction backward to produce smaller compounds from even very complex biomass substances such as cellulose, insect chitin, glycogen or starch. Cellulose of course is the basic component of all plant cell walls. So we can use this process to break down even waste into small substances such as glucose or alcohol. As an example, methanol or ethanol could be processed simply into fuel or plastic. What a gas!

Is photosynthesis a reversible reaction?

Researchers have discovered that monooxygenases, enzymes already widely used to make bioplastics and biofuel—a clean-burning fuel, or ethanol, made from agricultural waste instead of petroleum—work significantly faster and more efficiently when exposed to sunlight. The enzymes break down biomass to release sugars from plant fibers which are then fermented into ethanol. But without sunlight, the process takes a long time.

Reverse Photosynthesis, A New Energy source of the …

“Reverse photosynthesis,” as the researchers call it, isn’t just a manmade process. Some fungi and bacteria use it to access sugar and nutrients in plants. For humans, it may also be useful in breaking down the chemical bonds between carbon and hydrogen so as to convert plant-sourced methane into methanol, a liquid fuel.

‘Reverse photosynthesis’ uses sunlight to make fuel – …

"We use the term "reverse photosynthesis" because the enzymes use atmospheric oxygen and the Sun's rays to break down and transform carbon bonds, in plants among other things, instead of building plants and producing oxygen as is typically understood with photosynthesis,” says Postdoc Klaus Benedikt Møllers

Researchers do not yet know how widespread “reverse photosynthesis,” using light, chlorophyll and monooxygenases, is in nature, but there are many indications that fungi and bacteria use reverse photosynthesis as a “Thor's hammer" to access sugars and nutrients in plants.

The breakthrough is the result of collaborative, multidisciplinary research at the Copenhagen Plant Science Centre that spans the disciplines of plant science, biotechnology and chemistry. The research is mainly funded by the Danish Council for Independent Research.

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