揭开无氧呼吸的神秘面纱:一个解决问题的练习。

IF 1.6 Q2 EDUCATION, SCIENTIFIC DISCIPLINES Journal of Microbiology & Biology Education Pub Date : 2024-08-19 DOI:10.1128/jmbe.00044-24
Tomas Linder
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引用次数: 0

摘要

厌氧呼吸反应对全球元素的生物地球化学循环至关重要。然而,细胞呼吸不仅可以在缺氧的情况下发生,而且还涉及无机底物(如 AsO33-、Fe2+、H2、H2S、Mn2+、NH3 和 S0)的氧化,这对许多本科生来说往往是陌生的。本文介绍了一个解决问题的练习,向学生介绍呼吸作用的热力学基本原理,尤其侧重于氧化还原(还原-氧化)电位(E0´)的作用。在练习中,学生们将探究不同还原剂和氧化剂对之间的氧化还原电位差(ΔE0´)如何影响自然环境中缺氧时微生物代谢反应的允许范围。
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Demystifying anaerobic respiration: a problem-solving exercise.

Anaerobic respiration reactions are of fundamental importance to global biogeochemical cycling of elements. Yet, the idea that cellular respiration can occur not only in the absence of oxygen but also involve the oxidation of inorganic substrates (e.g., AsO33-, Fe2+, H2, H2S, Mn2+, NH3, and S0) is often foreign to many undergraduate students. This article describes a problem-solving exercise where students are introduced to the thermodynamic fundamentals of respiration with a particular focus on the role of redox (reduction-oxidation) potentials (E0´). In the exercise, the students investigate how the difference in redox potential (ΔE0´) between different pairs of reductants and oxidants affects the range of permissible microbial metabolic reactions in natural environments when oxygen is absent.

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来源期刊
Journal of Microbiology & Biology Education
Journal of Microbiology & Biology Education EDUCATION, SCIENTIFIC DISCIPLINES-
CiteScore
3.00
自引率
26.30%
发文量
95
审稿时长
22 weeks
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