Overview

microorganism

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activated sludge process

Overview page. Subjects: Environmental Science.

A sewage and waste-water treatment. The sludge produced after primary treatment is pumped into aeration tanks, where it is continuously stirred and aerated, resulting in the formation of...

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agent of disease

Overview page. Subjects: Environmental Science.

Any factor (such as a micro‐organism, a chemical substance, or a form of radiation) that is essential for the occurrence of a disease.

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alimentary canal

Overview page. Subjects: Medicine and Health.

(ali-ment-er-i)

the long passage, extending from the mouth to the anus, through which food passes to be digested and absorbed.

The alimentary canal

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ammonification

Overview page. Subjects: Environmental Science.

The biochemical process in which ammonia is produced by micro‐organisms through the decomposition of organic matter.

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anaerobic decomposition

Overview page. Subjects: Environmental Science.

The breakdown of organic matter caused by anaerobicmicro‐organisms in an oxygen‐free environment.

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autoimmune disease

Overview page. Subjects: Medicine and Health.

A heterogeneous group of diseases, some of obscure etiology, including rheumatoid arthritis and ulcerative colitis, characterized by development of antibodies that attack the host's cells...

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bioreactor

Overview page. Subjects: Chemistry.

A large stainless steel tank used to grow producer microorganisms in the industrial production of enzymes and other chemicals. After the tank is steam-sterilized, an inoculum of the...

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chemotherapy

Overview page. Subjects: Medicine and Health.

The use of chemicals, especially drugs, in the treatment of disease. The term is often used specifically to denote drug therapy for cancer, as distinct from treatments with radiation...

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culture

Overview page. Subjects: Biological Sciences.

A population of micro-organisms or of the dissociated cells of a tissue grown, for experiment, in a nutrient medium: they multiply by asexual division.

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decay

Overview page. Subjects: Chemistry — Environmental Science.

To graduate decrease or decompose. 1. The breakdown of organic matter by micro‐organisms. 2. The decrease of a radioactive substance because of nuclear emission of alpha or beta particles,...

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