Obligate aerobe

Bacillus stearothermophilus Aerobe, obligate thermophUe (growth range co. 45°-80°C.) + 0... 

Obligate aerobe Bacteria which require the presense of oxygen, such as Pseudomonas flourescens. A few strains of this species are capable of utilizing nitrate to allow anaerobic respiration. 

Mechanism and sulphur oxidation Apart from its intrinsic interest the economic importance of acid corrosion and more lately interest in ore leaching, has stimulated considerable work on the oxidation of sulphur, Fe and Mn. It must be stressed that the Thiobacilli are obligate aerobes, i.e. that depend on molecular oxygen as a terminal electron acceptor. Possible reactions for the oxidation of sulphur are... 

We can see that for type 1 processes, high growth rate is obligately linked to a high rate of product formation. Indeed, this is the case for all products produced by a fermentative mode of metabolism, eg ethanol, lactic add, acetone. Chemostat studies have shown that for most aerobic processes when growth is limited by some nutrient other than the carbon source, the yield of product decreases with increase in spedfic growth rate (p or D p = dilution rate (D) in chemostat culture). Conversely, both the biomass yield and the spedfic rate of substrate utilisation (qs g substrate g biomass-1 h-1) increase with spedfic growth rate. 

Alcoholic fermentation, ethanol production, has been best known for a few decades by S. cerevisiae. Many obligate aerobic fungi, such as common moulds of the genera Aspergillus, Fusarium and Mucor are also well known for their ability to produce ethanol.2 The benefits are ... 

The azo reductases in aerobic bacteria were found to be existent when azoreductases from obligate aerobic bacteria were isolated and characterized from strains K22 and KF46 and were shown to be flavin-free after purification, characterization, and comparison 364, 362,363. These intracellular azoreductases showed high specificity to dye structures. Furthermore, Blumel and Stolz cloned and characterized the genetic code of the aerobic azo reductase from Pagmentiphaga... 

Nitrate and oxygen also may play an important role in determining the rate of azo dyes reduction. Wuhrmann et al. demonstrated that obligate aerobes might actually decolorize azo dye compounds under temporary anoxic conditions. However, high nitrite concentrations in the mixed liquor of activated sludge plants could significantly inhibit dye removal. 

Santos H, Fareleira P, Xavier AV, et al. 1993. Aerobic metabolism of carbon reserves by the obligate anaerobe Desulfovibrio gigas. Biochem Biophys Res Commun 195 551-7. 

Alcaligenes faecalis Obligately aerobic. Gram negative rods or cocci, occur in ... 

Streak any anaerobes recovered onto TSA and incubate aerobically to determine whether these are true (obligate) anaerobes. 

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