Microorganisms aerobic

Microorganisms associated with corrosion are of two types, aerobic and anaerobic. Aerobic microorganisms readily grow in an environment containing oxygen, while the anaerobic species thrive in an environment virtually devoid of atmospheric oxygen. 

Aerobe Microorganism growing in the presence of air or requiring air for growth. 

In Desulfovibrio, as in other strict anaerobes and some aerobic microorganisms, pyruvate is oxidatively decarboxylated by pyruvate oxidoreductase (FOR) according to the following reaction ... 

Besides the aerobic microorganisms there are also anaerobic ones. These exist and multiply where no dissolved oxygen is present. Saprophytic bacteria produce organic acids and alcohols. The methane bacteria will then convert these compounds into cells plus carbon dioxide and methane. The methane may be recovered and binned as fuel. If any sulfur is present it will eventually be converted to H2S. 

Acrylonitrile is readily degraded by aerobic microorganisms in water, especially if there is time for acclimation (Cherry et al. 1956 Mills and Stack 1953, 1955 Stover and Kincannon 1983). After 27 days of acclimation, about 70% of the acrylonitrile initially present in river water was degraded under laboratory conditions, yielding acrylic acid and ammonia. Complete degradation occurred under ideal conditions where nutrients were added to promote microbial growth (Cherry et al. 1956). 

Two studies compared the effect of rifaximin to that of neomycin and/or of rifampicin [72, 73] on the fecal flora in rats. In the first study [72] the antibiotic (1, 10, 30 and 100 mg/kg orally for 7 days) did inhibit both aerobic (especially coliforms and cocci) and anaerobic bacterial growth. Its activity was similar to that of neomycin and stronger than that of rifampicin. In the second investigation [73] the antibiotic effect on aerobic microorganisms was specifically investigated. Oral rifaximin treatment (50 mg/kg for 3 days) caused a marked reduction in the number of total aerobic bacteria and salmonellae, while neomycin led only to a decrease in salmonella counts, but did not cause statistically significant changes in the total aerobic bacterial population. 

In a preliminary study [70], intrapocket administration of rifaximin in patients with periodontal disease was studied from both microbiological and clinical points of view. The activity of this antibiotic against the microorganisms isolated from periodontal pockets is shown in table 3. The high local concentration of rifaximin should likely exceed the observed MIC values. Indeed, its topical application was followed by a quick disappearance of anaerobic bacteria and a marked reduction of aerobic microorganisms. This was accompanied by a significant clinical improvement. 

Aerobic aerobic microorganisms utilize oxygen as a terminal electron acceptor and possess superoxide dismutase or catalase enzymes which are capable of degrading peroxide radicals. 

Bacillus Bacilli are characterized as Gram-positive aerobic microorganisms which produce endospores. This genus is heterotrophic and diverse, comprising 10% of the bacterial population. 

The odourous substances scrubbed out of the air are used by aerobic microorganisms as a substrate and are thus removed from the water. 

Many [NiFe] hydrogenases (from anaerobic or semi-aerobic microorganisms) dissolved in aerobic buffer contain two unpaired electrons. One of these is located on the [3Fe-4S]... 

Both SODs and catalases are ubiquitous among aerobic microorganisms. 

Aerobic Microorganisms and Aerobic Treatment of Soiid Wastes... 

Such xenobiotics as aliphatic hydrocarbons and derivatives, chlorinated ahphatic compounds (methyl, ethyl, methylene, and ethylene chlorides), aromatic hydrocarbons and derivatives (benzene, toluene, phthalate, ethylbenzene, xylenes, and phenol), polycyclic aromatic hydrocarbons, halogenated aromatic compounds (chlorophenols, polychlorinated biphenyls, dioxins and relatives, DDT and relatives), AZO dyes, compounds with nitrogroups (explosive-contaminated waste and herbicides), and organophosphate wastes can be treated effectively by aerobic microorganisms. 

BioGEE HC is a bioremediation product for the in situ or ex situ remediation of soil or groundwater. It consists of a blend of several strains of aerobic microorganisms selected for their ability to degrade hydrocarbon contaminants. The BioGEE HC technology has been used in multiple full-scale apphcations and is commercially available. 

The vendor claims that the addition of oxygen during air sparging enhances the aerobic microorganism growth, accelerating breakdown of contaminants in the aquifer. 

Bioremediation aims at innocuous end-products. In aerobic systems, CP mineralization is frequently achieved. Anaerobic processes often produce less-chlorinated end-products, which are environmentally less harmful and easier to degrade by aerobic microorganisms than the starting compounds. The pathways of CP biodegradation are well characterized. 

Aerobic microorganisms decompose this organic matter to the point that the water loses all its dissolved oxygen, and anaerobic microorganisms start functioning. This... 

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