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  2. Orange (fruit) - Wikipedia

    en.wikipedia.org/wiki/Orange_(fruit)

    Orange (fruit) Orange—whole, halved, and peeled segment. An orange, also called sweet orange to distinguish it from the bitter orange ( Citrus × aurantium ), is the fruit of a tree in the family Rutaceae. Botanically, this is the hybrid Citrus × sinensis, between the pomelo ( Citrus maxima) and the mandarin orange ( Citrus reticulata ).

  3. Methyl orange - Wikipedia

    en.wikipedia.org/wiki/Methyl_orange

    Methyl orange is a pH indicator frequently used in titration because of its clear and distinct color variance at different pH values. Methyl orange shows red color in acidic medium and yellow color in basic medium. Because it changes color at the p Ka of a mid strength acid, it is usually used in titration of strong acids in weak bases that ...

  4. Acridine orange - Wikipedia

    en.wikipedia.org/wiki/Acridine_orange

    Acridine orange is an organic compound that serves as a nucleic acid -selective fluorescent dye with cationic properties useful for cell cycle determination. Acridine orange is cell-permeable, which allows the dye to interact with DNA by intercalation, or RNA via electrostatic attractions. When bound to DNA, acridine orange is very similar ...

  5. pH indicator - Wikipedia

    en.wikipedia.org/wiki/PH_indicator

    Low pH color Transition low end Transition high end High pH color Gentian violet (Methyl violet 10B) yellow 0.0 2.0 blue-violet Malachite green (first transition) yellow 0.0 2.0 green Malachite green (second transition) green 11.6 14.0 colorless Thymol blue (first transition) red 1.2 2.8 yellow Thymol blue (second transition) yellow 8.0 9.6 blue

  6. Orange juice - Wikipedia

    en.wikipedia.org/wiki/Orange_juice

    Orange juice is a liquid extract of the orange tree fruit, produced by squeezing or reaming oranges. It comes in several different varieties, including blood orange, navel oranges, valencia orange, clementine, and tangerine. As well as variations in oranges used, some varieties include differing amounts of juice vesicles, known as "pulp" in ...

  7. Xylenol orange - Wikipedia

    en.wikipedia.org/wiki/Xylenol_orange

    Xylenol orange is an organic reagent, most commonly used as a tetrasodium salt as an indicator for metal titrations. When used for metal titrations, it will appear red in the titrand and become yellow once it reaches its endpoint. Historically, commercial preparations of it have been notoriously impure, [2] sometimes consisting of as little as ...