Microbiology Glossary


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Microbiology Glossary

Part 1 - German terms with English translations.

See Grammatical Notes for an explanation of column 2.

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German		English	Comments
überlagern		to blanket	E. g.: blanket a culture with CO₂
Überlagerung		Blanketing
überlebend		Surviving
Überlebensfaktor		Survival factor	N/N₀ in sterilization, where N₀ is the initial count and N is the count after sterilization
Überzug	m	Coating
Ultradünnschicht		Ultra-thin section	Very thin slice for examination with a transmission electron microscope
Ultrazentrifuge	f	Ultracentrifuge	An ultracentrifuge runs at very high speed and sufficiently high ‘g’ force to sediment protein molecules. Very small volume, usually observed with an optical system, and in an armored enclosure.
umgekehrtes Mikroskop		Inverted microscope	Optical microscope designed so that the objective lens looks upward
Umkehrosmose		Reverse osmosis	Liquid is forced under high pressure through a membrane to purify water or to separate certain fermentation products
Umwälzer		Circulator
Umwurfsystem		Circulating system	Stirred vessel
untergärig		Bottom-fermenting	Yeast, usually in beer production
Unterleibstyphus		Typhoid fever	Pathogen: Salmonella typhi (usually in water with fecal pollution). Note: There is much confusion in German literature between typhoid fever and typhus!! Accurate translation may require knowledge of the situation, symptoms, and pathogen! Typhoid fever: Incubation 3 – 60 days, usually ca. 10 days. Headache, chill, fever increasing by steps over 5-7 days, lasting 2-3 weeks, rash in 2d week. Up to 30% fatalities if untreated (chloramphenicol, amicillin) Note: Other Salmonella species cause similar diseases. Note: S. typhi has previously been known as S. typhosa and Eberthella typhosa.
USP		USP	US Pharmacopeia; includes purity specifications