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Related Concept Videos

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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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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Other Algae01:19

Other Algae

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The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
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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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Lipid Catabolism01:25

Lipid Catabolism

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Triglycerides serve as crucial long-term energy storage molecules in microorganisms, providing a dense source of metabolic energy. Their breakdown is mediated by lipases, which hydrolyze triglycerides into glycerol and free fatty acids. Each of these components follows distinct metabolic pathways, ultimately contributing to ATP synthesis and cellular energy homeostasis.Glycerol MetabolismGlycerol, released from triglyceride hydrolysis, is phosphorylated by glycerol kinase to form...
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Bioremediation00:46

Bioremediation

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Bioremediation is the use of prokaryotes, fungi, or plants to remove pollutants from the environment. This process has been used to remove harmful toxins in groundwater as a byproduct of agricultural run-off and also to clean up oil spills.
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Analysis of Fatty Acid Content and Composition in Microalgae
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High-Value Bioactive Molecules Extracted from Microalgae.

Carla Arenas Colarte1, Iván Balic2, Óscar Díaz2

  • 1Centro de Investigación Austral Biotech, Facultad de Ciencias, Universidad Santo Tomás, Santiago 8320000, Chile.

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|September 27, 2025
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Summary

Microalgae are sustainable biorefineries rich in proteins, lipids, and bioactive compounds. Optimizing extraction methods is key to unlocking their potential for functional foods and pharmaceuticals.

Keywords:
bioactive compoundsextractionmicroalgaemicrobialplantsustainability

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Area of Science:

  • Biotechnology and Sustainable Resources
  • Phycology and Biomolecular Science

Background:

  • Microalgae are unicellular photosynthetic organisms with high genetic diversity and metabolic capabilities.
  • They serve as sustainable cellular biorefineries, producing valuable biomolecules like proteins, lipids, and polysaccharides.
  • Cultivation conditions (light, temperature, nutrients) significantly influence biomolecule synthesis.

Purpose of the Study:

  • To review the nutritional and bioactive potential of microalgae.
  • To highlight advancements in microalgal extraction technologies.
  • To discuss microalgae applications in health-oriented industrial innovation.

Main Methods:

  • Literature review of current knowledge on microalgae.
  • Analysis of factors influencing biomolecule production.
  • Evaluation of different extraction techniques (mechanical, enzymatic, combined).

Main Results:

  • Microalgae are rich sources of high-value compounds, including proteins (up to 70% w/w), polyunsaturated fatty acids (DHA, EPA), and bioactive beta-glucans.
  • Extraction method selection is crucial for preserving the functionality of target compounds.
  • Industrial development is hindered by challenges in extraction efficiency, scalability, and regulatory approval.

Conclusions:

  • Microalgae possess significant potential for functional foods, pharmaceuticals, and biofuels.
  • Advances in extraction technologies are essential for industrial exploitation.
  • Further research and development are needed to overcome industrialization challenges and realize the full potential of microalgae.