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相关概念视频

Bioremediation00:46

Bioremediation

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.
Synthetic Biology02:55

Synthetic Biology

Synthetic biology is an interdisciplinary science that involves using principles from disciplines such as engineering, molecular biology, cell biology, and systems biology. It involves remodeling existing organisms from nature or constructing completely new synthetic organisms for applications such as protein or enzyme production, bioremediation, value-added macromolecule production, and the addition of desirable traits to crops, to name a few.
Golden rice
Golden rice is a genetically modified...
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...
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Production of Pharmaceuticals

Industrial insulin production uses genetically engineered E. coli expressing a proinsulin gene controlled by a tryptophan promoter and containing a methionine linker for later cleavage. The cells also carry ampicillin resistance for selective growth. Seed cultures are stored at −80 °C and production begins by thawing a small amount to inoculate starter cultures, which are progressively scaled to a 50,000-L bioreactor. In the bioreactor, E. coli grow in nutrient-rich media under sterile, tightly...
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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...
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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...

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相关实验视频

Updated: May 10, 2026

Isolation of Native Soil Microorganisms with Potential for Breaking Down Biodegradable Plastic Mulch Films Used in Agriculture
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一种嵌入在PLA中的工程酶,用于制造可自降解的塑料

M Guicherd1,2, M Ben Khaled1, M Guéroult1,2

  • 1Toulouse Biotechnology Institute, Université de Toulouse, CNRS, INRAE, INSA, Toulouse, France.

Nature
|July 17, 2024
PubMed
概括

一种新的聚酸 (PLA) 塑料包含一个优化的酶以快速生物降解. 这种酶化PLA薄膜在24周内达到家庭堆肥标准, 为塑料废物提供可持续的解决方案.

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科学领域:

  • 材料科学
  • 生物技术
  • 环境科学

背景情况:

  • 全球塑料生产,尤其是一次性塑料产品,造成了严重的环境污染.
  • 寻求可生物降解和可堆肥的塑料作为废物管理解决方案.
  • 聚酸 (PLA) 是一种常见的生物塑料,在土壤和家庭堆肥环境中呈现缓慢的生物降解.

研究的目的:

  • 开发一种基于聚酸 (PLA) 的塑料,在室温下具有增强的,快速的生物降解性和堆肥性.
  • 设计一种具有显著改善活性的高热稳定性PLA化酶.
  • 通过可扩展的工业工艺将这种酶整合到PLA中,用于实际应用.

主要方法:

  • 基于结构的合理工程PLA化剂,实现80倍的活动增加.
  • 在PLA中通过聚烯酸 (PCL) 主批使用融挤出分散酶.
  • 通过在160°C的融挤出产生酶化的PLA薄膜 (0.02%的酶).

主要成果:

  • 在家用堆肥条件下,酶化PLA薄膜在20至24周内完全分解.
  • 这种材料符合家庭堆肥标准.
  • 酶膜显示出适用于工业包装的机械性能和储存期间的稳定性.

结论:

  • 已经建立了一个可扩展的工业工艺,用于制造快速生物降解的PLA塑料.
  • 这种酶化的PLA为塑料废物管理提供了可行的解决方案,并支持堆肥和生物甲生产的应用.
  • 该材料与工业包装要求的兼容性和储存稳定性突显了其实际潜力.