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Related Concept Videos

Bioplastics01:27

Bioplastics

Bioplastics derived from microbial processes present a sustainable alternative to conventional petroleum-based plastics. Among these, polyhydroxyalkanoates (PHAs), particularly polyhydroxybutyrates (PHBs), have emerged as prominent candidates due to their biodegradability and biocompatibility. These polymers are synthesized by a variety of bacteria, such as Cupriavidus necator and Pseudomonas putida, which naturally accumulate PHAs as intracellular carbon and energy reserves, especially under...
Types of Step-Growth Polymers: Polyesters01:20

Types of Step-Growth Polymers: Polyesters

The introduction of polyesters has brought major development to the textile industry. The wrinkle-free behavior of polyester blends has eliminated the need for starching and ironing clothes.
Polyesters are commonly prepared from terephthalic acid and ethylene glycol; the crude product is known as poly(ethylene terephthalate) or PET. However, polyesters are synthesized industrially by transesterification of dimethyl terephthalate with ethylene glycol at 150 °C. The two reactants and the polymer...
Microbial Bioremediation of Plastics01:28

Microbial Bioremediation of Plastics

Polyethylene terephthalate (PET) is a synthetic polymer widely utilized in the packaging industry, particularly for bottles and containers. Due to its chemical stability and durability, PET accumulates in the environment, contributing significantly to plastic pollution. It comprises repeating units of terephthalic acid and ethylene glycol, resulting in a semi-crystalline structure that is resistant to natural degradation processes.A notable breakthrough in plastic biodegradation came with the...
Polymers02:34

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
Polymers02:34

Polymers

The word polymer is derived from the Greek words “poly” which means “many” and “mer” which means “parts”. Polymers are long chains of molecules composed of repeating units of smaller molecules, known as monomers. They either occur naturally, such as DNA and proteins, or can be constructed synthetically, like plastics. They have varied structural characteristics, such as linear chains, branched chains, or complex networks, that contribute to the properties that they exhibit. Additionally,...
Production of Organic Acids01:25

Production of Organic Acids

Lactic acid, an important organic acid extensively applied in food, pharmaceutical, and biodegradable polymer industries, is primarily produced via microbial fermentation. This method is favored over chemical synthesis due to its environmental sustainability and capacity for enantiomerically pure product formation. Among various microbial processes, the fermentation of starch-based substrates stands out due to the abundance and renewability of raw materials like corn and potatoes.Hydrolysis of...

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The impact of synthetic biology.

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Updated: May 11, 2026

Scalable Step-by-Step Approach of Sustainable Bioplastic Production from Food Waste
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Future of microbial polyesters.

Gi Na Lee1, Jonguk Na

  • 1Korean Minjok Leadership Academy, 600 Bongwha-ro, Anheung-myeon, Hoengseong-gun, Gangwon-do 225-823, Republic of Korea.

Microbial Cell Factories
|May 30, 2013
PubMed
Summary
This summary is machine-generated.

Microorganisms produce polyhydroxyalkanoates (PHAs) as energy storage. Metabolic engineering can enhance PHA production for cost-effective, versatile biopolymers with tunable properties.

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Area of Science:

  • Biotechnology
  • Polymer Science
  • Microbiology

Background:

  • Microorganisms naturally synthesize polyhydroxyalkanoates (PHAs) as carbon and energy reserves under unfavorable growth conditions.
  • PHAs are polyesters composed of (R)-hydroxycarboxylic acids, with properties varying based on monomer composition and metabolic pathways.
  • Metabolic engineering enables the production of diverse PHAs, including non-natural polyesters incorporating lactate.

Discussion:

  • Reducing PHA production costs and enhancing material properties are crucial for widespread application.
  • Metabolic engineering offers strategies to develop microbial strains for high-yield PHA production from low-cost feedstocks.
  • Tailoring PHA monomer composition through metabolic engineering can yield polymers with properties comparable to petrochemical plastics.

Key Insights:

  • Microbial production of PHAs is a sustainable alternative to petrochemical polymers.
  • Metabolic engineering unlocks the potential for novel PHA structures and functionalities.
  • Optimizing microbial strains is key to achieving economically viable and high-performance bioplastics.

Outlook:

  • Future research will focus on advanced metabolic engineering techniques to expand the PHA monomer repertoire.
  • Developing efficient downstream processing methods will further reduce PHA production costs.
  • Integration of synthetic biology and systems biology approaches will accelerate the design of custom PHA materials.