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Search Results for “air purification”
 
 
1) liquid air. The Columbia Encyclopedia, Sixth Edition. 2001
...liquid air, ordinary air that has been liquefied by compression and cooling to extremely low temperatures (see liquefaction). Its commercial preparation involves...

2) charcoal. The Columbia Encyclopedia, Sixth Edition. 2001
...of solids from solution. It is used in sugar refining, in water purification, in the purification of factory air, and in gas masks. By special heating or chemical...

3) thulium. The Columbia Encyclopedia, Sixth Edition. 2001
...Tm2O3, is called thulia. Thulium is the least abundant of the rare-earth metals. It is found in the minerals gadolinite and euxenite and in monazite, the chief commercial...

4) Estonia. The World Factbook. 2003
...however, the amount of pollutants emitted to the air have fallen steadily, the emissions of 2000 were 80% less than in 1980; the amount of unpurified wastewater discharged...

5) Chapter 20. Tabooed Persons. 5. Manslayers tabooed. Frazer, Sir James George. 1922. The Golden Bough
...such as have actually shed the blood of their enemies. In the island of Timor, when a warlike expedition has returned in triumph bringing the heads of the vanquished...

6) potassium. The Columbia Encyclopedia, Sixth Edition. 2001
...of other potassium compounds. The chlorate, KClO3, and perchlorate, KClO4, are used in explosives and fireworks. The hydroxide, or caustic potash, KOH, is used in...

7) chlorine. The Columbia Encyclopedia, Sixth Edition. 2001
...chloride. It burns if ignited in a hydrogen atmosphere and, if unignited, can form explosive mixtures with hydrogen; it also unites with the hydrogen in compounds...

8) 9. Summary. II. The Tennysons. Vol. 13. The Victorian Age, Part One. The Cambridge History of English and American Literature: An Encyclopedia in Eighteen Volumes. 190721
...of English poetic diction, the liberation and enrichment of English verse, and he uses them all as a conscious, careful artist. His poetry stands to theirs much as...

9) helium. The Columbia Encyclopedia, Sixth Edition. 2001
...is formed. Liquid helium-II has a number of unusual properties. It is sometimes called a superfluid because it has extremely low viscosity. It also has extremely...

10) Chapter 63. The Interpretation of the Fire-Festivals. 1. On the Fire-festivals in general. Frazer, Sir James George. 1922. The Golden Bough
...men, of animals, and of plants. According to the one theory the fire is a stimulant, according to the other it is a disinfectant; on the one view its virtue is positive,...

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