相关实验视频

Updated: Jul 2, 2025

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

Development of Sulfidogenic Sludge from Marine Sediments and Trichloroethylene Reduction in an Upflow Anaerobic Sludge Blanket Reactor

Published on: October 15, 2015

揭示暴露在微生物还原性脱的抑制机制:动力学和微生物反应

Zheng-Tao Li¹, Xin Song², Songhu Yuan³

¹MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou 310030, PR China.

|February 21, 2024

概括

(VI) 严重抑制三乙烯 (TCE) 的微生物脱,影响重要的细菌. 供应气减轻了这种情况,使得结合和TCE生物修复成为可能.

科学领域:

环境微生物学环境微生物学
生物修复是一种生物修复.
地质化学地质化学

背景情况:

地下含水层经常被工业活动造成的和三乙烯 (TCE) 污染.
了解微生物对这些混合污染物的反应对于有效的补救策略至关重要.

研究的目的:

在不同的TCE-Cr (III/VI) 条件下研究微生物脱动力学.
阐明微生物反应机制,包括社区转移和元基因组洞察力.

主要方法:

在复合TCE-Cr (III/VI) 污染下评估微生物脱动力学.
分析了微生物社区的转变,并采用了元基因组分析来了解反应机制.
评估了外源供应对微生物脱的影响.

主要成果:

降低性脱联合体显示出高的Cr (III) 耐药性,但极端的Cr (VI) 敏感性,抑制了脱.
吸收乙烯基的有机化物吸收细菌 (OHRB) 比吸收TCE的OHRB更容易受到Cr (III/VI) 的感染.
(III/VI) 干扰了产生H2的乙生成,导致电子供体缺乏,但外源H2供应减轻了这种抑制.
作为一个关键的OHRB,Dehalococcoides具有Cr (VI) 抵抗缺陷,但与协同的非OHRB合作,同时进行生物解毒.

结论:

微生物脱受到Cr (VI) 毒性的显著影响,影响不同的功能微生物群体不均.
外源供应可以克服由应力引起的电子供体缺陷.
脱球菌和协同作用的细菌可以实现和TCE的共同修复,为现场生物修复提供了洞察力.

关键词:

酸盐是什么意思酸盐是什么意思复合污染复合污染复合污染德哈洛科科伊德 (Dehalococcoides) 是一种除类植物.地下水的地下水.降低性去化是一种减少性去化.三乙烯是三乙烯的一种.

更多相关视频

Development and Validation of Chromium Getters for Solid Oxide Fuel Cell Power Systems

Development and Validation of Chromium Getters for Solid Oxide Fuel Cell Power Systems

Published on: May 26, 2019

Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1

Electrochemical Detection of Deuterium Kinetic Isotope Effect on Extracellular Electron Transport in Shewanella oneidensis MR-1

Published on: April 16, 2018

相关概念视频

The Electron Transport Chain

The Electron Transport Chain

The electron transport chain or oxidative phosphorylation is an exothermic process in which free energy released during electron transfer reactions is coupled to ATP synthesis. This process is a significant source of energy in aerobic cells, and therefore inhibitors of the electron transport chain can be detrimental to the cell's metabolic processes.
Inhibitors of the electron transport chain
Rotenone, a widely used pesticide, prevents electron transfer from Fe-S cluster to ubiquinone or Q...

E1 Reaction: Kinetics and Mechanism

E1 Reaction: Kinetics and Mechanism

Here, in contrast to the E2 reaction mechanism, we delve into the aspects of the E1 reaction mechanism, which has two steps: rate-limiting loss of the leaving group and abstraction of the beta hydrogen by a weak base. Typically, the experimental proof for the E1 mechanism is via kinetic studies or isotope studies. While the former demonstrates the first-order kinetics—the dependence of the reaction solely on substrate concentration—the latter proves the abstraction of hydrogen only...

Phase I Reactions: Reductive Reactions

Phase I Reactions: Reductive Reactions

Phase I biotransformation reductive reactions are chemical processes that modify drugs by introducing or revealing polar functional groups via reduction. Enzymes called reductases catalyze these reactions, playing a pivotal role in drug metabolism by transforming lipophilic drugs into more polar, water-soluble metabolites for easy excretion. An essential type of reductive reaction is the carbonyl group reduction, where aldehydes and ketones are reduced to alcohols. An example is the...

Indirect-Acting Cholinergic Agonists: Mechanism of Action

Indirect-Acting Cholinergic Agonists: Mechanism of Action

Indirect-acting cholinergic agonists work by interacting with an enzyme called acetylcholinesterase (AChE) in the synaptic cleft. They can be reversible or irreversible inhibitors and have different effects on the enzyme.
Reversible inhibitors like edrophonium bind to a specific part of the enzyme called the anionic catalytic site. They form noncovalent bonds, which means they are not strongly attached to the enzyme. This creates a temporary and less stable enzyme–inhibitor complex,...

Toxic Reactions: Overview

Toxic Reactions: Overview

When toxic substances penetrate the human body, they disseminate to various tissues, undergoing metabolic changes. This process yields reactive metabolites that may covalently bind with specific target molecules, resulting in toxicity.
Toxicity falls into two primary categories: local and systemic.
Local toxicity appears at the exposure site, such as protein denaturation caused by caustic substances.
In contrast, systemic toxicity requires the toxic agent's absorption and distribution,...