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  2. pH - Wikipedia

    en.wikipedia.org/wiki/PH

    The pH level of food influences its flavor, texture, and shelf life. [33] Acidic foods, such as citrus fruits, tomatoes, and vinegar, typically have a pH below 4.6 [34] with sharp and tangy taste, while basic foods tastes bitter or soapy. [35] Maintaining the appropriate pH in foods is essential for preventing the growth of harmful ...

  3. Soil pH - Wikipedia

    en.wikipedia.org/wiki/Soil_pH

    Soil pH is a measure ... 4.5–5.0 Strongly acidic: 5.1–5.5 ... examples are projects to breed aluminium-tolerant and manganese-tolerant varieties of cereal crops ...

  4. Acid dissociation constant - Wikipedia

    en.wikipedia.org/wiki/Acid_dissociation_constant

    At pH ≤ pK a − 2 the substance is said to be fully protonated and at pH ≥ ... 3.4: 5.2 Aniline: 10.62: 3.6: 4.6 ... For aqueous solutions the pH scale is the ...

  5. Propylene glycol - Wikipedia

    en.wikipedia.org/wiki/Propylene_glycol

    2.0% for general food categories; 2.5% for frozen dairy products; 5% for alcoholic beverages; 5% for nuts and nut products; 24% for confections and frostings; 97% for seasonings and flavorings; The European Food Safety Authority authorizes propylene glycol for use in food manufacturing, establishing a safe daily intake of 25 mg per kg of body ...

  6. Gastric acid - Wikipedia

    en.wikipedia.org/wiki/Gastric_acid

    The lowest pH of the secreted acid is 0.8, [5] but the acid is diluted in the stomach lumen to a pH of between 1 and 3. There is a small continuous basal secretion of gastric acid between meals of usually less than 10 mEq/hour. [6] There are three phases in the secretion of gastric acid which increase the secretion rate in order to digest a ...

  7. Amylase - Wikipedia

    en.wikipedia.org/wiki/Amylase

    Optimum pH 6.7–7.0 5.4–5.5 4.0–4.5 Optimum temperature in brewing ... wild animals eating a broad range of foods tend to have more copies of amylase. This may ...

  8. Palm oil - Wikipedia

    en.wikipedia.org/wiki/Palm_oil

    Food producers are required to list the specific type of vegetable fat used, including palm oil. Vegetable oils and fats can be grouped together in the ingredients list under the term "vegetable oils" or "vegetable fats" but this must be followed by the type of vegetable origin (e.g., palm, sunflower, or rapeseed) and the phrase "in varying ...

  9. Fecal pH test - Wikipedia

    en.wikipedia.org/wiki/Fecal_pH_test

    The pH of human faeces is variable but the average is pH 6.6 for normal faeces. [1] [2] A lower faecal pH (very acidic stool) can indicate a digestive problem such poor absorption of carbohydrates or fats, [3] lactose intolerance, [4] an infection such as E. coli or rotavirus, or overgrowth of acid-producing bacteria (such as lactic acid bacteria).

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