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bacteria, planktonic

Overview page. Subjects: Medicine and Health.

In terms of food processing hygiene, bacteria that are floating freely on a surface, as opposed to those that have attached to the surface and formed a biofilm.

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dental unit water lines

Overview page. Subjects: Dentistry.


Part of a dental chair unit (DCU) used to provide water to cool and irrigate a variety of DCU-supplied instruments (i.e. turbine and conventional handpieces, ultrasonic...

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oral flora

Overview page. Subjects: Dentistry.

Micro-organisms that normally inhabit the oral cavity, of which bacteria are the predominant group. The oral cavity is sterile at birth, but quickly becomes colonized by bacteria (both...

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Overview page. Subjects: Zoology and Animal Sciences — Medicine and Health.

The living, proteinaceous, layered structure which surrounds the cells in many types of Protozoa. It is immediately below the cell membrane and surrounds the cytoplasm (it is not...

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Overview page. Subjects: Medicine and Health — Science and Mathematics.

Any small patch or region of abnormal tissue within the body. See amyloid plaque, gliosis. [From French plaquer to plate, from Middle Dutch placken to beat metal]

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Overview page. Subjects: Biological Sciences.

The area of soil immediately surrounding plant roots, which is altered by their growth, respiration, exchange of nutrients, etc. Within this zone a further zone is sometimes distinguished,...

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