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Related Concept Videos

Biofuels01:25

Biofuels

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The microbial conversion of organic matter into biofuels holds potential as a renewable energy source. Among biofuel sources, microalgae are recognized as a highly efficient and adaptable feedstock for biodiesel production, owing to their rapid biomass accumulation, elevated lipid productivity, and capacity to proliferate in diverse aquatic systems, including freshwater, marine, and wastewater habitats. Unlike terrestrial crops, microalgae do not compete for land and can achieve significantly...
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Green Algae01:21

Green Algae

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Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
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Reduction of Alkenes: Catalytic Hydrogenation02:13

Reduction of Alkenes: Catalytic Hydrogenation

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Alkenes undergo reduction by the addition of molecular hydrogen to give alkanes. Because the process generally occurs in the presence of a transition-metal catalyst, the reaction is called catalytic hydrogenation.
Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the...
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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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Red Algae01:23

Red Algae

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Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...
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Overview of Algae01:28

Overview of Algae

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The kingdom Archaeplastida encompasses red and green algae, along with land plants. Unlike other protists with chloroplasts that arose through secondary endosymbiosis, only red and green algae originated from primary endosymbiotic events. This diverse group of eukaryotic organisms contains chlorophyll and performs oxygenic photosynthesis.Algae exist in various forms, from large brown kelp in coastal waters to green scum in puddles and stains on rocks or soil. Some species are responsible for...
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Cultivation of Green Microalgae in Bubble Column Photobioreactors and an Assay for Neutral Lipids
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Challenges and opportunities for hydrogen production from microalgae.

Melanie Oey1, Anne Linda Sawyer2, Ian Lawrence Ross1

  • 1Institute for Molecular Bioscience, The University of Queensland, St Lucia, Qld, Australia.

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|January 24, 2016
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Microalgae can produce carbon-neutral hydrogen fuel from sunlight and water. This review explores microalgal technology

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Area of Science:

  • Renewable energy technologies
  • Biotechnology
  • Sustainable fuels

Background:

  • Global population growth and economic development necessitate a 50% increase in fuel demand by 2050.
  • Achieving a 50-80% reduction in carbon dioxide (CO2) emissions is crucial for energy and climate security.
  • The current energy landscape relies heavily on fuels (80%) rather than electricity (20%).

Purpose of the Study:

  • To evaluate the potential of microalgal technologies for commercial, solar-driven hydrogen (H2) production from water.
  • To summarize global technology drivers and the theoretical limits of microalgal H2 production.
  • To explore strategies for next-generation microalgal systems within the evolving H2 economy.

Main Methods:

  • Review of existing literature on microalgal H2 production systems.
  • Analysis of technological drivers and economic feasibility.
  • Assessment of engineering strategies for enhanced H2 yield.

Main Results:

  • Microalgae represent an advanced, CO2-neutral fuel source for H2 production.
  • Current microalgal systems for biofuels are at the demonstration scale.
  • Solar-driven H2 production using microalgae shows significant theoretical potential.

Conclusions:

  • Microalgal H2 production is a promising renewable energy strategy to meet future fuel demands.
  • Further development of engineered microalgal systems is needed for commercial viability.
  • Integrating microalgal H2 into the broader H2 economy is essential for decarbonization efforts.