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Micro UNCW Test II

Micro UNCW Test II - Term Definition Bacteria that can only...

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Term: Bacteria that can only grow in reduced oxygen levels Definition: Microaerophile Term: Bacterium capable of growing in high salt concentrations Definition: Halophile Term: bacterium that respires in the presence of oxygen and ferments in its absence is called Definition: Facultative Anaerobe Term: Bacteria that are able to grow at extremely low water availability Definition: xerophiles Term: Only grow in presence of oxygen Definition: Aerophiles
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Term: Bacterium that is able to grow on top of jam that is left uncovered Definition: osmophiles Term: Agent which is able to prevent the growth of bacteria which may or may not be lethal Definition: Bacterialstatic Term: Autoclave parameters at sealevel Definition: 121 degrees C, 15 psi, 15 minutes Term: E. coli can replicate every Definition: 20 minutes Term: These counting chambers are used to perform direct microscopic counts of bacteria Definition: Petroff-Hauser Counting Chambers
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Term: Flash Pasteurization Definition: 71 C, 15 seconds. Have to be very precise. Term: Bulk Pasteurization Definition: 63-66 C, 30 minutes. A lot of heat = a lot of time = expensive. Term: Cold Sterilizaton Definition: Expose to radiation and sterilize. Term: Gamma Radiation Definition: Penetrates well Term: UV light/X rays Definition: Doesn't penetrate well. UV light sterilizes well, but paper can block sterilization.
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Term: Filter Sterilization Definition: Used for heat sensitive products. Term: HEPA Filters Definition: Used to sterilize air. Draws air through fibers. Has to take 99.9% (of 0.3um) all bacteria and most viruses. Term: Ethylene Oxide Definition: Used to sterilize in hospitals. Gas sterilization. Explosive risk and carcinogen. Mix with stable gas like Nitrogen. Term: Sterilants Definition: Term used for sporicide, kills endospores. Term: Bactericidal Definition: Kills bacteria including spores
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Term: Vircidal Definition: Kills viruses, influenza Term: Selective Toxicity Definition: Best drugs have highest selective toxicity.
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