通过微生物在不同微观环境中的尘埃中降解酸盐的基础降解
Dong-Min Ye1, Hao Yang1, Ting-Ting Xu1
1Guangdong Key Laboratory of Environmental Pollution and Health, School of Environment, Jinan University, Guangzhou 510632, China.
Environmental science & technology
|June 20, 2023
概括
在室内灰尘中发现了甲酸单 (me-PAE) 和甲酸 (PAE) 一起存在. 一些me-PAE比其母PAE度更高,这表明可能发生微生物降解.
科学领域:
- 环境科学 环境科学
- 微生物学 微生物学
- 毒理学 毒理学 毒理学
背景情况:
- 甲酸单 (me-PAE) 是人类暴露于甲酸 (PAE) 的已确立生物标志物.
- 关于me-PAE的环境来源和分布的研究有限.
研究的目的:
- 调查PAE和me-PAE在室内灰尘中的同时发生和度.
- 分析尘埃样本中的细菌多样性.
- 探索 ME-PAE 度与与 PAE 降解相关的基因之间的关系.
主要方法:
- 从各种微环境中收集尘埃样本.
- 使用分析技术量化PAE和me-PAE的度.
- 使用16S rRNA测序来表征细菌群落.
- 编码可能参与PAE降解的酶的精选和定量基因.
主要成果:
- 在所有尘埃样本中,me-PAE与PAE一起检测到.
- 九种PAE的度在108~1450μg/g之间,16种me-PAE的度在6.00~21.6μg/g之间.
- 低分子量me-PAE (例如,单甲基甲酸盐,单甲基甲酸盐) 的度比它们的母化合物更高.
- 蛋白质细菌,动态细菌,细菌群和菌群是占主导地位的细菌类 (>90%的丰度).
- 来自公共汽车和空调装置的灰尘表现出最高的细菌物种丰富和多样性.
- 编码疑似PAE降解酶的基因丰富度增加与更高的me-PAE度相关.
结论:
- 室内尘埃藏着PAE和me-PAE,有可能在现场形成me-PAE.
- 尘埃中的细菌群体,特别是在交通繁忙的地区,可能在甲酸盐代谢中发挥作用.
- 调查结果提供了对室内环境中的me-PAE概况和来源的见解,有助于准确评估人类暴露.
相关概念视频
Environmental Applications of Microorganisms
77
Microorganisms play a pivotal role in maintaining ecosystem balance by recycling essential elements such as carbon, nitrogen, and phosphorus, as well as supporting processes like bioremediation, wastewater treatment, and biofuel production.Microbes in Elemental CyclesIn the carbon cycle, microorganisms decompose organic matter, releasing carbon dioxide via aerobic respiration. This carbon dioxide is subsequently used by photosynthetic organisms to synthesize organic compounds, closing the...
77
Types of Toxins
1.8K
Humans continually engage with an environment rich in potentially harmful chemicals. These are introduced to our bodies through inhalation, ingestion, or skin contact. These chemicals exist in various forms, such as air and environmental pollutants, agricultural chemicals, organic solvents, and heavy metals.
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
Air pollutants, primarily gases, pose significant threats to respiratory health, leading to conditions like hypoxia, lung cancer, and in extreme cases, death.
Environmental pollutants like...
1.8K
Types of Step-Growth Polymers: Polyesters
2.3K
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...
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...
2.3K
Lipid Catabolism
102
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...
102
Chemical Agents for Microbial Control
141
Chemicals play important roles in controlling microbial growth by targeting microbial structures and functions as sanitizers, antiseptics, disinfectants, and sterilants.Alcohols are commonly used sanitizers, effectively disrupting lipid membranes, which compromises cell integrity. They are also used as antiseptics and disinfectants due to their rapid action and versatility.Phenols and their derivatives phenolics , known for denaturing proteins and disrupting cell membranes, are particularly...
141


