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  2. Paracetamol - Wikipedia

    en.wikipedia.org/wiki/Paracetamol

    Paracetamol, [a] or acetaminophen, [b] is a non-opioid analgesic and antipyretic agent used to treat fever and mild to moderate pain. [13] [14] [15] It is a widely available over-the-counter drug sold under various brand names, including Tylenol and Panadol.

  3. Gravimetric analysis - Wikipedia

    en.wikipedia.org/wiki/Gravimetric_analysis

    Gravimetric analysis describes a set of methods used in analytical chemistry for the quantitative determination of an analyte (the ion being analyzed) based on its mass. The principle of this type of analysis is that once an ion's mass has been determined as a unique compound, that known measurement can then be used to determine the same analyte's mass in a mixture, as long as the relative ...

  4. McFarland standards - Wikipedia

    en.wikipedia.org/wiki/McFarland_standards

    A 0.5 McFarland standard is prepared by mixing 0.05 mL of 1.175% barium chloride dihydrate (BaCl 2 •2H 2 O), with 9.95 mL of 1% sulfuric acid (H 2 SO 4). [ 1 ] Now there are McFarland standards prepared from suspensions of latex particles, which lengthens the shelf life and stability of the suspensions.

  5. Dram (unit) - Wikipedia

    en.wikipedia.org/wiki/Dram_(unit)

    The dram (alternative British spelling drachm; apothecary symbol ʒ or ℨ; [a] abbreviated dr) [4] [5]: C-6–C-7 [6] is a unit of mass in the avoirdupois system, and both a unit of mass and a unit of volume in the apothecaries' system. [5] It was originally both a coin and a weight in ancient Greece. [7]

  6. Hydrostatic weighing - Wikipedia

    en.wikipedia.org/wiki/Hydrostatic_weighing

    Example 1: If a block of solid stone weighs 3 kilograms on dry land and 2 kilogram when immersed in a tub of water, then it has displaced 1 kilogram of water. Since 1 liter of water weighs 1 kilogram (at 4 °C), it follows that the volume of the block is 1 liter and the density (mass/volume) of the stone is 3 kilograms/liter.

  7. 4-Acetamidobutanal - Wikipedia

    en.wikipedia.org/wiki/4-Acetamidobutanal

    4-Acetamidobutanal, also known as N-acetyl-γ-aminobutyraldehyde, N-acetyl-GABAL, or N-acetyl-GABA aldehyde, is a metabolic intermediate in the biosynthesis of γ- ...

  8. Ringelmann scale - Wikipedia

    en.wikipedia.org/wiki/Ringelmann_scale

    Ringelmann smoke charts, 1897. The Ringelmann scale is a scale for measuring the apparent density or opacity of smoke. [1] [2] It was developed by a French professor of agricultural engineering Maximilien Ringelmann of La Station d'Essais de Machines in Paris, who first specified the scale in 1888.

  9. Common-path interferometer - Wikipedia

    en.wikipedia.org/wiki/Common-path_interferometer

    Precision measurements of an optical surface are also extremely dependent on the quality of the auxiliary optics. Because the scatterplate interferometer is a common-path interferometer, the reference and test paths are automatically matched so that a zero order fringe can be easily obtained even with white light.