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Related Concept Videos

Green Algae01:21

Green Algae

533
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...
533
Other Algae01:19

Other Algae

262
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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Red Algae01:23

Red Algae

570
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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Towards green extraction methods from microalgae learning from the classics.

Paola Imbimbo1, Luigi D'Elia1, Davide Liberti1

  • 1Department of Chemical Science, University of Naples Federico II, via Cinthia 4, 80126, Naples, Italy.

Applied Microbiology and Biotechnology
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Microalgae offer valuable bioactive compounds beyond biofuels. This review explores green extraction methods for high-purity compounds, advancing the microalgal biorefinery concept.

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Compressed fluid extractionGreen chemistryLipidsMicroalgaeMicrowave-assisted extractionSwitchable solvents

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Area of Science:

  • Biotechnology
  • Marine Biology
  • Green Chemistry

Background:

  • Microalgae are recognized for biofuel potential and rich bioactive compounds.
  • High market demand exists for microalgal bioactive molecules with health benefits.
  • The microalgal biorefinery approach focuses on fractionating biomass into high-value products.

Purpose of the Study:

  • To review technical advancements in microalgal biomass fractionation.
  • To compare conventional extraction methods with emerging green techniques.
  • To highlight methods preserving the biological activity of extracted compounds.

Main Methods:

  • Comparative analysis of conventional extraction techniques.
  • Evaluation of green extraction methods: switchable solvents, microwave-assisted extraction, and compressed fluid extraction.
  • Focus on downstream processing for high-purity compound isolation.

Main Results:

  • Conventional methods often yield single compound classes with environmental drawbacks.
  • Green extraction techniques offer reduced environmental impact and potential for higher purity.
  • New procedures are crucial to maintain the bioactivity of extracted molecules.

Conclusions:

  • Developing green downstream platforms is essential for sustainable microalgal biorefineries.
  • Advanced extraction techniques like switchable solvents and MACE/CFE show promise.
  • Optimizing extraction processes ensures the recovery of high-value, bioactive compounds from microalgae.