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Related Concept Videos

Biofuels01:25

Biofuels

74
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...
74
Oxidation of Alcohols02:37

Oxidation of Alcohols

18.2K
In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
18.2K
Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate02:21

Oxidation of Alkenes: Syn Dihydroxylation with Potassium Permanganate

18.1K
Alkenes can be dihydroxylated using potassium permanganate.  The method encompasses the reaction of an alkene with a cold, dilute solution of potassium permanganate under basic conditions to form a cis-diol along with a brown precipitate of manganese dioxide.
18.1K
Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids02:04

Oxidation of Alkenes: Anti Dihydroxylation with Peroxy Acids

8.1K
Diols are compounds with two hydroxyl groups. In addition to syn dihydroxylation, diols can also be synthesized through the process of anti dihydroxylation. The process involves treating an alkene with a peroxycarboxylic acid to form an epoxide. Epoxides are highly strained three-membered rings with oxygen and two carbons occupying the corners of an equilateral triangle. This step is followed by ring-opening of the epoxide in the presence of an aqueous acid to give a trans diol.
8.1K
Lipid Catabolism01:25

Lipid Catabolism

1.3K
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...
1.3K
Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide02:44

Oxidation of Alkenes: Syn Dihydroxylation with Osmium Tetraoxide

13.5K
Alkenes are converted to 1,2-diols or glycols through a process called dihydroxylation. It involves the addition of two hydroxyl groups across the double bond with two different stereochemical approaches, namely anti and syn. Dihydroxylation using osmium tetroxide progresses with syn stereochemistry.
13.5K

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Analysis of Fatty Acid Content and Composition in Microalgae
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Lipid extraction from microalgae cell using persulfate-based oxidation.

Yeong Hwan Seo1, Mina Sung1, You-Kwan Oh2

  • 1Department of Civil and Environmental Engineering, KAIST, 373-1, Guseong-dong, Yuseong-gu, Daejeon 305-701, Republic of Korea.

Bioresource Technology
|November 29, 2015
PubMed
Summary
This summary is machine-generated.

Persulfate effectively extracts microalgae lipids, achieving over 95% efficiency. This cheaper, solid oxidant offers a competitive alternative to hydrogen peroxide for biodiesel production.

Keywords:
Fenton-like reactionLipid extractionMicroalgaeOxidationPersulfate

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Area of Science:

  • Biotechnology
  • Chemical Engineering
  • Renewable Energy

Background:

  • Microalgae are a promising source for biodiesel production.
  • Efficient lipid extraction is crucial for economic viability.
  • Current methods often rely on expensive or hazardous oxidants.

Purpose of the Study:

  • To investigate persulfate as a cost-effective oxidant for microalgae lipid extraction.
  • To compare persulfate's efficiency against hydrogen peroxide.
  • To evaluate the combined approach of iron-based coagulation and persulfate extraction.

Main Methods:

  • Microalgae cells were concentrated at pH 3 with 200 mg/L ferric chloride.
  • Lipid extraction was performed using persulfate as the oxidant.
  • Extraction efficiency was measured at varying persulfate concentrations and temperatures.

Main Results:

  • Over 95% lipid extraction efficiency was achieved using 2mM persulfate at 90°C.
  • Persulfate demonstrated higher efficiency compared to 0.5% hydrogen peroxide under identical conditions.
  • The combined iron-based coagulation and persulfate extraction showed competitive performance.

Conclusions:

  • Persulfate is a powerful, cost-effective oxidant for microalgae lipid extraction.
  • It presents a viable and cheaper alternative to hydrogen peroxide.
  • This method can potentially reduce the process burden in microalgae-derived biodiesel production.