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Technical Glossaries




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Optical Microscopy


microbiology translation
Microbiology Glossary

Part 2, English terms and abbreviations with explanations.

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Term Explanation
AACC American Association of Cereal Chemists
AATCC American Association of Textile Chemists and Colorists
AC medium General growth medium. Peptone, beef extract, yeast extract, malt extract, dextrose, ascorbic acid, 0.1% agar, pH 7.2. AC Broth does not have agar.
ACES (2-[(2-amino-2-keto-ethyl)amino]ethanesulfonic acid. Buffer for pH range 6.1-7.5
Acid food Generally, a food with pH naturally  < 4.0, so that it is (relatively) safe from bacterial spoilage
Acidophilus Lactobacillus acidophilus
ADA N-[2-acetamido]-2-iminodiacetic acid; Buffer for pH range 6.0-7.2
Agar diffusion (1) a procedure for detecting growth inhibitors (antibiotics) by measuring the diameter of a zone of inhibition around a sample of growth inhibitor on an agar plate. (2) a procedure for detecting antigen-antibody reactions from samples diffusing toward each other through agar
Agar droplet (count) Counting procedure in which the a dilution of sample is placed (at increasing dilutions) into three tubes of melted agar. Small droplets of the agar are placed on the bottom of a Petri dish, incubated, and examined under magnification.
Agar, Noble Specially washed agar, by the method of Noble and Tonney. Highly purified.
AHT Antihyaluronidase Titration Test
AMP 2-amino-2-methyl-1-propanol; Buffer for pH range 9.0-10.5
AMPSO 3-[(1,1-dimethyl-2-hydroxyethyl)amino]-2-hydroxypropane-sulfonic acid; Buffer for pH range 8.3-9.7
AOAC Association of Official Analytical Chemists
APHA American Public Health Association
API American Petroleum Institute
APT Agar All-purpose agar with Tween 80
ARS Autonomously replicating sequence (DNA)
ATP Adenosine triphosphate.
ATP assay A procedure for detecting living cells by  using their ATP content to excite chemiluminescence, typically with the luciferin/luciferase reaction.
ATS medium Used for mycobacteria. Egg yolk suspension, glycerol extract of potatos, Malachite green; ATS: American Trudeau Society.
AU Absorbance unit
AWWA American Water Works Association

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