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alum 中文解釋 wordnet sense Collocation Usage Collins Definition
Noun
/ˈaləm/,
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alums, plural;
  1. A colorless astringent compound that is a hydrated double sulfate of aluminum and potassium, used in solution medicinally and in dyeing and tanning

  2. Any of a number of analogous crystalline double sulfates of a monovalent metal (or group) and a trivalent metal

  1. a white crystalline double sulfate of aluminum: the ammonium double sulfate of aluminum
  2. alumnus: a person who has received a degree from a school (high school or college or university)
  3. Alum is both a specific chemical compound and a class of chemical compounds. The specific compound is the hydrated potassium aluminium sulfate with the formula KAl(SO4)2.12H2O. The wider class of compounds known as alums have the related stoichiometry, AB(SO4)2.12H2O.
  4. A type of immune adjuvant (a substance used to help boost the immune response to a vaccine). Also called aluminum sulfate.
  5. Any one of several aluminum compounds used in pools to form a gelatinous floc on sand filters or to coagulate and precipitate suspended particles in the water.
  6. aluminium sulphate, added to gelatine in the sizing of paper to stabilise the gelatine.
  7. chemical used in acid hardening fixing baths.
  8. also called hydrated aluminum sulfate or papermaker’s alum. A papermaking chemical that’s typically used when adding rosin size to pulp, alum imparts water-resistant properties to paper. In practical terms, it keeps paper from clinging to the presses, see also rosin, sizing.
  9. A common name for aluminum sulfate (Al2(SO4)3, used as a coagulant.
  10. An alum is a double salt comprising a sulphate salt of a monovalent element, with the sulphate salt of a trivalent element. The most well known example is potash alum (aluminium potassium sulphate) KAl(SO4)2.12H2O which is used to clear murky water.
  11. In the papermaking context, alumina sulfate: A12(SO4)3 ù 14H20, A12(SO4)3 ù 18H20, or a mixture of these hydrates. ...
  12. Mixed double salts of aluminum sulphate with potassium sodium or ammonium sulfate. (Potassium salt, when pure, was most commonly called "Alum."). (Al2(SO4)3 ^. K2SO4 ^. 24H2O); (Al2(SO4)3 ^. (NH4)2SO4 ^. 24H2O); (Al2(SO4)3 ^. Na2SO4 ^. 24H2O).
  13. A salt used to prepare a skin for binding, rendering it soft, flexible, and white in colour. See also tawing.
  14. an odorless, colorless substance used as a topical antibiotic, as an adjuvant in some vaccines and sometimes as placebo.
  15. The term used in papermaking for aluminium sulphate. Its action on rosin size is to precipitate the size upon the fibres giving them a degree of water repellency.
  16. alum and was used as an astringent in mouthwashes and gargles, dermatological preparations and as the styptic in styptic pencils.
  17. (aluminum sulphate and potassium) material used as a fixative and mordant agent in the dyeing of fibers.
  18. An astringent crystalline substance used in rosin sizing to hold paper fibers together; responsible for introducing acid into the paper.
  19. Also called aluminum sulfate. (1) Chemical release agent, used when pure fiber furnish is run at low basis weight to prevent sticking to the paper machine presses. ...
  20. abbreviation for Alumnus, Alumna, Alumni, or Alumnae
  21. aluminum sulfate, commonly called Floc. Used to help clarify water. Causes small particles to join together so they can be trapped in filter. Alum lowers the pH of the water.
  22. An acidic substance used in papermaking to adjust the pH level of water in pulp and to fix rosin (a sizing agent first used in the 18th century) to cellulose fibers, giving paper a less permeable surface to prevent bleeding. ...
  23. It is a white bright devalue of aluminum. Hydrated aluminum potassium sulfate is ordinarily great great great great great great great great great great great great great great good great good great good great good great good great well great well great well well well well well well well well ...
  24. (Aluminum Sulfate) - An aluminum sulfate compound, used to cause suspended solids in the water to congeal into filterable masses. (flocculate)
  25. crystalline potassium aluminum sulfate,  was used medicinally as a topical astringent, that is a compound which caused the bodies tissues to draw together or constrict.  It was effective in slowing the flow of blood or other bodily fluids. ...