Magnesium history

In 1915 the price of magnesium was 11.00/kg of the year. On a constant doUar basis, the price of magnesium decreased steadily until the 1950s and has fluctuated mostly in the 3.00 to 4.00/kg range since that time. The price history of magnesium on a constant doUar basis from 1930 to 1990 is shown in Figure 9. The 1994 price for magnesium was 3.37/kg. 

The characteristics of these alloys make them ideal for boat and shipbuilding, for which a long history of satisfactory performance is on record for the higher magnesium alloys. Where strength is less critical the lower magnesium alloys may be used with similar success and are recommended for aqueous conditions. 

Diverse thermogravimetric results can be obtained from samples with different pre-histories for example, TG and DTG curves showed that magnesium hydroxide prepared by precipitation methods has a different temperature of decomposition from that for the naturally occurring material.32 It follows that the source and/or the method of formation of the sample should be ascertained. 

Vanadate, dioxybis(oxamato)-bond-length ratios, 1,57 Vanadate, heptacyano-potassium salt structure, I, 72 Vanadate, hexafluoro-dipotassium salt history, I, 21 potassium salt history, 1,21 tripotassium salt history, 1,21 Vanadate, pentachloro-stereochemistry, 1,40 Vanadate, pentafluorooxy-stereochemistry, I, 50 Vanadates biochemistry, 3,456 calcium/magnesium ATPase inhibition, 6, 567 competition with phosphates physiology, 6,665 protonation, 3,1026 sodium pump, 6, 557 in uranium purification from ore, 6, 899 Vanadates, hexafluoro-, 3. 482,531 Vanadates, oxoperoxo-, 3,501 Vanadates, pentacarbonyl-, 3, 457 Vanadium biology, 6,665 determination, 1. 548 extraction... 

Metallic components of zinc, aluminium and magnesium (or their alloys) are unsuitable for service with bromomethane because of the formation of pyrophoric Grig-nard-type compounds. The Case History attributes a severe explosion to ignition of a bromomethane-air mixture by pyrophoric methylaluminium bromides produced by corrosion of an aluminium component. 

Kroll (magnesium-reduction) process manufacture of, 24 851—853 price history of, 24 861t sodium-reduction process manufacture of, 24 853... 

Ziprasidone, pimozide, mesoridazine, and thioridazine have been shown to prolong the QT interval, and drugs with this potential have been associated with torsade de pointes-type arrhythmias and sudden death. Perform a baseline ECG and measure serum potassium and magnesium before initiation of treatment and periodically during treatment, especially during a period of dose adjustment. Patients with QT interval over 450 msec should not receive mesoridazine or thioridazine. Avoid ziprasidone in patients with histories of significant cardiovascular illness (eg. 

Contraindications Allergy to tartrazine dye, bleeding disorders, GI bleeding or ulceration, history of hypersensitivity to choline magnesium trisalicylate, aspirin, or NSAIDs. 

The history of the bromides dates from the discovery of bromine by A. J. Balard1 in 1824. He prepared potassium bromide by the action of bromine on potash lye, and calcined the residue remaining on evaporating the product to dryness. The bromine in sea-water may be present as alkali bromide, but more probably as magnesium bromide. It is, however, uncertain how the bromides are distributed and similar remarks apply to the bromides present in spring and mine waters. Potassium bromide is used in chemical laboratories medicinally in some nervous diseases and in photography. 

The weathering of surface rocks has had a critical role in the chemical evolution of the continental crust for most of the Earth s history. In the presence of air and water, mafic minerals tend to rapidly weather into iron (oxy)(hydr)oxides, clays, and other silicate minerals, and at least partially water-soluble salts of alkalis (sodium and potassium) and alkaline earths (calcium and magnesium). In contrast, quartz in felsic and intermediate igneous rocks is very stable in the presence of surface air and water, which explains why the mineral readily accumulates in sands and other sediments. 

R. D. Smith, The History and use of magnesium alkoxides in the nonaqueous deacidification of books, documents and works of art on paper. Paper presented at the 1983 Annual Meeting of Internationale Arbeitsgemeinschaft der Archiv-, Bibliothek- und Graphikrestauratoren (LADA), The Hague, Netherlands,... 

Folk R.L. (1974) The natural history of crystalline calcium carbonate Effect of magnesium content and salinity. J. Sediment. Petrol. 44,40-53. 

Lowenstam H.A. (1961) Mineralogy, 180/160 ratios, and strontium and magnesium contents of recent and fossil brachiopods and their bearing on the history of the oceans. J. Geol. 69, 241-260. 

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