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词汇 Anaerobic organism
分类 英语词汇 英语翻译词典
释义

Anaerobic organism

中文百科

厌氧生物

厌氧生物，或称厌气生物，是指一种不需要氧气生长的生物。牠们大致上可以分为三种，即专性厌氧生物、兼性厌氧生物及耐氧厌氧生物 。人体内的厌氧生物多存在于消化系统中，有些种类的厌氧细菌会产生毒素。

厌氧生物可以是单细胞的（例如原生生物和细菌），但也可以是多细胞的（例如一些多毛纲生物）。

英语百科

Anaerobic organism 厌氧生物

Spinoloricus nov. sp., a metazoan that metabolises with hydrogen, lacking mitochondria and instead using hydrogenosomes.
Aerobic and anaerobic bacteria can be identified by growing them in test tubes of thioglycollate broth: 1: Obligate aerobes need oxygen because they cannot ferment or respire anaerobically. They gather at the top of the tube where the oxygen concentration is highest. 2: Obligate anaerobes are poisoned by oxygen, so they gather at the bottom of the tube where the oxygen concentration is lowest. 3: Facultative anaerobes can grow with or without oxygen because they can metabolise energy aerobically or anaerobically. They gather mostly at the top because aerobic respiration generates more ATP than either fermentation or anaerobic respiration. 4: Microaerophiles need oxygen because they cannot ferment or respire anaerobically. However, they are poisoned by high concentrations of oxygen. They gather in the upper part of the test tube but not the very top. 5: Aerotolerant organisms do not require oxygen as they metabolise energy anaerobically. Unlike obligate anaerobes however, they are not poisoned by oxygen. They can be found evenly spread throughout the test tube.

An anaerobic organism or anaerobe is any organism that does not require oxygen for growth. It may react negatively or even die if oxygen is present. An anaerobic organism may be unicellular (e.g. protozoans, bacteria) or multicellular.
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