Environmental Microbiology

Sulphur cycle

Sulphur cycle

Sulphur cycle Sulphur is found in living organisms in the form of compounds such as amino acids, coenzymes and vitamins. It can be utilised by different types of organisms in several forms. In its elemental form, sulphur is unavailable to most organisms. However, certain bacteria such as Acidithiobacillus are able to oxidise it to sulphate, a …

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Nitrogen Cycle

Nitrogen Cycle All organisms need nitrogen to synthesize protein, nucleic acids, and other nitrogen containing compounds. Molecular nitrogen (N2) makes up almost 80% of the Earth’s atmosphere. For plants to assimilate and use nitrogen, it must be fixed, that is, taken up and combined into organic compounds. The activities of specific microorganisms are important to …

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Bioremediation Earth’s surface became contaminated with natural and xenobiotic toxic chemicals. Examples include polluted aquifers and other water bodies, mining areas, and industrial sites contaminated with petrochemical products, pesticides, heavy metals, radionuclides and many of the xenobiotics The basic principle of bioremediation involves utilizing the activity of microorganisms naturally present in the soil and water, or …

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the carbon cycle

The Carbon Cycle

The Carbon Cycle The primary biogeochemical cycle is the carbon cycle. In biogeochemical cycles elements are oxidized and reduced by microorganisms to meet their metabolic needs. All organisms, including plants, microbes, and animals, contain large amounts of carbon in the form of organic compounds such as cellulose, starches, fats, and proteins. Autotrophs perform an essential …

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