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  2. Oxidative/fermentation glucose test - Wikipedia

    en.wikipedia.org/.../fermentation_glucose_test

    To perform the OF-glucose test, two tubes of OF-glucose medium are inoculated with the test organism. A layer of mineral oil is added to the top of the deep in one of the tubes to create anaerobic conditions. Oil is not added to the other tube to allow for aerobic conditions. The tubes are then incubated for 24–48 hours.

  3. Bacteriological water analysis - Wikipedia

    en.wikipedia.org/wiki/Bacteriological_water_analysis

    Bacteriological water analysis is a method of analysing water to estimate the numbers of bacteria present and, if needed, to find out what sort of bacteria they are. It represents one aspect of water quality. It is a microbiological analytical procedure which uses samples of water and from these samples determines the concentration of bacteria ...

  4. Durham tube - Wikipedia

    en.wikipedia.org/wiki/Durham_tube

    Durham tubes are used in microbiology to detect production of gas by microorganisms. They are simply smaller test tubes inserted upside down in another test tube so they are freely movable. The culture media to be tested is then added to the larger tube and sterilized , which also eliminates the initial air gap produced when the tube is ...

  5. Fermentation - Wikipedia

    en.wikipedia.org/wiki/Fermentation

    In ethanol fermentation, one glucose molecule is converted into two ethanol molecules and two carbon dioxide (CO 2) molecules. [11] [12] It is used to make bread dough rise: the carbon dioxide forms bubbles, expanding the dough into a foam. [13] [14] The ethanol is the intoxicating agent in alcoholic beverages such as wine, beer and liquor. [15]

  6. Instruments used in microbiology - Wikipedia

    en.wikipedia.org/wiki/Instruments_used_in...

    Cragie tube: see link: Desiccator: to dry things Durham's tube: used to detect gas production in sugar fermentation media; the tube is placed in an inverted fashion so that gases produced get trapped in it and do not float away to the surface Gas-pak: releases gases to remove oxygen from a closed container, usually for anaerobiosis: Glass slide

  7. In vitro - Wikipedia

    en.wikipedia.org/wiki/In_vitro

    In vitro testing has been used to characterize specific adsorption, distribution, metabolism, and excretion processes of drugs or general chemicals inside a living organism; for example, Caco-2 cell experiments can be performed to estimate the absorption of compounds through the lining of the gastrointestinal tract; [20] The partitioning of the ...

  8. Test tube - Wikipedia

    en.wikipedia.org/wiki/Test_tube

    A boiling tube is a large test tube intended specifically for boiling liquids. A test tube filled with water and upturned into a water-filled beaker is often used to capture gases, e.g. in electrolysis demonstrations. A test tube with a stopper is often used for temporary storage of chemical or biological samples.

  9. Thioglycolate broth - Wikipedia

    en.wikipedia.org/wiki/Thioglycolate_broth

    However, they are poisoned by high concentrations of oxygen. They gather in the upper part of the test tube, but not the very top. 5: Aerotolerant organisms do not require oxygen as they metabolise energy anaerobically. Unlike obligate anaerobes, though, they are not poisoned by oxygen. They can be found evenly spread throughout the test tube.