ALUM

ălˈəm, any one of a series of isomorphous double salts that are hydrated sulfates of a univalent cation (e.g., potassium, sodium, ammonium, cesium, or thallium) and a trivalent cation (e.g., aluminum, chromium, iron, manganese, cobalt, or titanium). The name alum commonly refers to potassium aluminum sulfate dodecahydrate, or potash alum, KAl(SO4)2·12H2O, a colorless-to-white, crystalline compound. It is used in water purification, leather tanning, mordant dyeing, as an astringent, and in baking powder; it occurs in nature as the mineral kalunite. Sodium aluminum sulfate, or soda alum, NaAl(SO4)2·12H2O, is also used in baking powder. Ammonium aluminum sulfate, or ammonia alum, NH4Al(SO4)2·12H2O, is used in tanning, in dyeing and fireproofing textiles, in vegetable glues and porcelain cements, and in water purification. Chromium potassium sulfate, or chrome alum, KCr(SO4)2·12H2O, is used as a mordant in dyeing, in tanning, and in photographic fixing baths to harden gelatin films and plates. Aluminum sulfate, Al2(SO4)3·18H2O, is also called alum. A pseudoalum is a double sulfate salt of a divalent cation (e.g., magnesium or calcium) and a trivalent cation (e.g., aluminum).

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The Columbia Encyclopedia, Sixth Edition Copyright© 2004, Columbia University Press. Licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.

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Questia Books and Articles on: Alum
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books on: Alum  - 1595 results

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...6. Wine 74 7. Alum 80 8. Cloth 95...in the late 1430s 147 3 Alum prices 150 4 Imported cloth...Constantinople in the later 1430s 147 A3.1 Alum Prices 150 A4.1 Imported cloth...
...red when treated with greasy mordants and alum, a secret jealously preserved by Eastern...McDowell in 1986 analysed as madder with alum. 15 The next earliest madder dyeing...Germer decided on the Roman dating as alum mordanted wool was not known in the Middle...
...VII. The Royal Alum Works 82...included such products as soap, saltpeter, alum, sulphur, oil, salt, glass, and cloth...Treasury from the profits of monopoly was the alum project, which resulted so disastrously...
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journal articles on: Alum  - 100 results

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...relies on the addition of chemicals such as alum (aluminium sulfate) as coagulants and the...percent natural coagulant + 20 percent alum); residual turbidity of clarified water...WHO standards for drinking water. When alum (Al.sub.2SO.sub.4) was used, however, the...
...Quran and other blessings. Some women put alum (shabbih) in the beads so that if the evil...eye. Both the blue beads and the white alum serve as protection against the evil eye...was a healer. She took three pieces of alum (shabbih), one personifying men, the...
...Cohort <br/ Armstrong 1994 Alum Canada Ca-coh <br/ Milham 1979 Alum USA Cohort <br/ Moulin 2000 Alum France Cohort...
...money, commodities, slaves, grain, wine, alum, cloth, and metals. A final chapter deals...it was under strict government control. Alum, which was used as a dye in the European...was dominated by the Genoese, who mined alum in Anatolia. Details about end-use localities...
...of a student currently enrolled in the Alum Rock Union School District and of three...news article ran under this headline: "Alum Rock Chief Pitches His Reform Plan: Focus...Carrillo announced drastic moves to "revive" Alum Rock schools, which he termed "significantly...
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magazine articles on: Alum  - 198 results

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Baylor Selects Alum as New President. After fits and starts, Baylor Universitys search for a new president ended with the choice of Baylor alumnus...
Potty Mouth: Seinfeld Alum Julia Louis-Dreyfus Loves Bad Words and Gay Marriage. by Brandon Voss THE FOURTH SEASON of the CBS sitcom The New Adventures...
Rider of the Storm: As Reality TV Alum Jim Morrison Takes Stab at Public Office, a Contest He Won in a New York City Gay Bar Becomes an Issue in the Campaign. by...
Real World Recovery: In a Confessional New Book, Gay Real World Alum Chris Beckman Puts the Spotlight on a New Generation Fighting Addiction. by Michael Giltz "If Id started using drugs...
...other than aluminum adjuvants (also called alum-based adjuvants) had been used on U.S...Although the only U.S.-approved adjuvant is alum-based,others -- such as squalene -- have...immunizations" are mixed with adjuvants -- such as alum, squalene and squalene liquids -- to provide...
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newspaper articles on: Alum  - 1299 results

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Bartlett Alum Paladino Making an Impact at Harper...Miazga Daily Herald Correspondent Bartlett alum Chris Paladino has made an immediate impact...Lamothe at North Central: Burlington Central alum Bobbie Lamothe is now a member of the North...
Wave Alum Eby Reaps Football Award. by Mike Miazga...picked up some football hardware. Eby, a 2004 alum of the Perry Street school in Elgin, was...third in the country. Pucci at Loras: Jacobs alum Natalie Pucci is the leading scorer on the...
Larkin Alum Allison Earns Another Player of Week Award...start the week. Sikora at Augustana: Elgin alum Kelly Sikora is now a sophomore forward for...start the week. Mohney at Elmhurst: Huntley alum Andrew Mohney is a 6-7 junior center on the...
D-C Alum Rynders Earns Volleyball Honor at Beloit...Lamothe at North Central: Burlington Central alum Bobbie Lamothe is now a member of the North...Northwesterns 3-0 loss to Michigan. Cary-Grove alum Cassie McLaughlin had 5 kills and hit .400...
Jacobs Alum Zimka Helps NIU Soccer to National Ranking...Miazga Daily Herald Correspondent Jacobs alum Joe Zimka has played a major role in the...midfielder Jose Alvarado, a Burlington Central alum. Alvarado is a two-time all-conference selection...
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encyclopedia articles on: Alum  - 12 results

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ALUM al m, any one of a series of isomorphous double salts that are hydrated sulfates...cation (e.g., aluminum, chromium, iron, manganese, cobalt, or titanium). The name alum commonly refers to potassium aluminum sulfate dodecahydrate, or potash alum, KAl(SO 4 ) 2 12H 2 O, a colorless-to-white, crystalline compound. It is used in...
KALUNITE see alum . ____________________ Copyright 2009 Columbia University Press. Used with the permission of Columbia University Press. All rights reserved.
...vomiting. Direct, or gastric, emetics, which act directly on the stomach, include syrup of ipecac , sulfate of zinc or copper, alum , ammonium carbonate, mustard in water, or copious quantities of warm saltwater. Indirect, or systemic, emetics, such as apomorphine...
...24,826), Savoie dept., SE France, situated on Lake Bourget at the foot of the Alps. It is a popular resort and spa. The towns alum and sulfur springs have been frequented since Roman times. There are ruins of Roman baths. ____________________ Copyright...
...boarded by hand or machine to bring up the grain in a birds-eye effect. It probably originated with the Arabs in North Africa as an alum-tanned product typically dyed red. The process later spread to the Levant, to Turkey, and along the Mediterranean, where sumac...
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