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An air ioniser (or negative ion generator or Chizhevsky's chandelier) is a device that uses high voltage to ionise (electrically charge) air molecules. Negative ions, or anions, are particles with one or more extra electrons, conferring a net negative charge to the particle. Cations are positive ions missing one or more electrons, resulting in ...
The Portable Aqua Unit for Lifesaving (short PAUL) is a portable ultrafiltration-based membrane water filter for humanitarian aid. It allows the decentralized supply of clean water in emergency and disaster situations for about 400 persons per unit per day. The filter is designed to function with neither chemicals nor energy nor trained personnel.
Water softening is the removal of calcium, magnesium, and certain other metal cations in hard water. The resulting soft water requires less soap for the same cleaning effort, as soap is not wasted bonding with calcium ions. Soft water also extends the lifetime of plumbing by reducing or eliminating scale build-up in pipes and fittings.
Tetrachloroethylene is a derivative of ethylene with all hydrogens replaced by chlorine. 14.49% of the molecular weight of tetrachloroethylene consists of carbon and the remaining 85.5% is chlorine. It is the most stable compound among all chlorinated derivatives of ethane and ethylene.
July 9, 2024 at 1:58 PM. By Blake Brittain. WASHINGTON (Reuters) -A 97-year-old judge who was suspended from a U.S. appellate court last year after being accused of unfitness due to cognitive and ...
United States. The Report from Iron Mountain is a 1967 anti-war satire written by Leonard C. Lewin. [1] The book purports to be a leaked report authored by a Special Study Group tasked by the Kennedy Administration to plan the transition from a wartime economy and assess the potential social impacts of a "condition of general world peace." [1 ...
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