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Related Concept Videos

Oxygenic Photosynthesis01:26

Oxygenic Photosynthesis

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Oxygenic photosynthesis is a fundamental process in which light energy is harnessed to drive the oxidation of water, leading to the production of molecular oxygen (O₂), adenosine triphosphate (ATP), and nicotinamide adenine dinucleotide phosphate (NADPH). This process is essential for sustaining aerobic life on Earth and is primarily carried out by cyanobacteria, algae, and plants. The core of oxygenic photosynthesis lies in the thylakoid membranes, where chlorophyll pigments facilitate...
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The light reactions of photosynthesis assume a linear flow of electrons from water to NADP+. During this process, light energy drives the splitting of water molecules to produce oxygen. However, oxidation of water molecules is a thermodynamically unfavorable reaction and requires a strong oxidizing agent. This is accomplished by the first product of light reactions: oxidized P680 (or P680+), the most powerful oxidizing agent known in biology. The oxidized P680 that acquires an electron from the...
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What is Photosynthesis?00:39

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Photosynthesis is a multipart, biochemical process that occurs in plants as well as in some bacteria. It captures carbon dioxide and solar energy to produce glucose. Glucose stores chemical energy in the form of carbohydrates. The overall biochemical formula of photosynthesis is 6 CO2 + 6 H2O + Light energy → C6H12O6 + 6 O2. Photosynthesis releases oxygen into the atmosphere and is largely responsible for maintaining the Earth’s atmospheric oxygen content.
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What is Photosynthesis?01:00

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All living organisms on Earth are directly or indirectly dependent on photosynthesis. It is the only biological process that can capture energy from sunlight and convert it into chemical energy that every organism can use to power its metabolism. Photosynthesis is also the source of oxygen required by many living organisms.
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Anoxygenic photosynthesis is a phototrophic process that captures light energy to drive carbon fixation without producing molecular oxygen. Unlike oxygenic photosynthesis, which utilizes water as an electron donor and releases oxygen, anoxygenic phototrophs use alternative electron donors such as hydrogen sulfide (H₂S), elemental sulfur (S⁰), or thiosulfate (S₂O₃²⁻). This process is carried out by diverse groups of bacteria, including purple bacteria, green...
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Photosystem II01:22

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The multi-protein complex photosystem II (PS II) harvests photons and transfers their energy through its bound pigments to its reaction center, and ultimately to photosystem I (PSI) through the electron transport chain. The pigments responsible for caputirng the light energy in photosystems include chlorophyll a, chlorophyll b, and carotenoids.
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Generating Electric Current by Bioartificial Photosynthesis.

Babu Halan1, Jenny Tschörtner1, Andreas Schmid2

  • 1Department of Solar Materials, Helmholtz Centre for Environmental Research GmbH - UFZ, Leipzig, Germany.

Advances in Biochemical Engineering/Biotechnology
|December 11, 2017
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Summary
This summary is machine-generated.

Bioartificial photosynthesis harnesses solar energy for sustainable power. This technology, a fusion of bioelectrochemical systems and photovoltaics, generates electricity from sunlight and water, offering a promising renewable energy source.

Keywords:
Artificial photosynthesisCyanobacteriaExtracellular electron transferHydrogenMicrobial fuel cellsPhotobioelectrochemical systemsPhotovoltaics

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Area of Science:

  • Biotechnology
  • Renewable Energy
  • Photovoltaics

Background:

  • Bioartificial photosynthesis is an emerging field within bioelectrochemical systems (BESs).
  • It integrates biological components with electrodes for energy conversion.
  • This technology offers a sustainable energy pathway using abundant solar energy.

Purpose of the Study:

  • To review recent advancements, challenges, and future prospects in bioartificial photosynthesis.
  • To focus on light-harvesting technologies at the intersection of BESs and photovoltaics.
  • To compare bioartificial photosynthesis with other artificial systems mimicking natural photosynthesis.

Main Methods:

  • Discussion of fundamental principles and operational units of bioartificial photosynthesis.
  • Presentation of selected photobioelectrochemical systems using photosynthetic organisms.
  • Analysis of electron generation and transfer mechanisms.

Main Results:

  • Exploration of achievable current output and theoretical maxima.
  • Identification of factors influencing photocurrent efficiency and performance limitations.
  • Highlighting of scale-up bottlenecks for energy conversion enhancement.

Conclusions:

  • Bioartificial photosynthesis generates electrical energy from sunlight and water without organic feedstock.
  • Further research is needed to enhance energy conversion efficiency and overcome scale-up challenges.
  • This technology holds significant potential for sustainable energy generation.