metal impurity
121petroleum refining — Introduction conversion of crude oil into useful products. History Distillation of kerosene and naphtha The refining of crude petroleum owes its origin to the successful drilling of the first oil well in Titusville, Pa., in 1859. Prior to… …
122zinc processing — Introduction preparation of the ore for use in various products. Zinc (Zn) is a metallic element of hexagonal close packed (hcp) crystal structure and a density of 7.13 grams per cubic centimetre. It has only moderate hardness and can …
123Music of Hungary — Music of Hungary: Topics verbunkos táncház csárdás nóta History: (Samples) Genres Classical Folk Hardcor …
124Damascus Document — The Damascus Document (CD) (the Cairo Damascus document) or Damascus Rule is one of the most interesting texts of the Dead Sea Scrolls because it is the only Qumran sectarian work that was known before the discovery of the Dead Sea Scrolls. There …
125Vapour phase decomposition — (VPD) is a method used in the semiconductor industry to improve the sensitivity of atomic absorption spectroscopy (AAS) in order to detect metal impurities of very small concentrations on wafer surfaces. This can be achieved by enhancing the… …
126refractory — refractorily, adv. refractoriness, n. /ri frak teuh ree/, adj., n., pl. refractories. adj. 1. hard or impossible to manage; stubbornly disobedient: a refractory child. 2. resisting ordinary methods of treatment. 3. difficult to fuse, reduce, or… …
127Covalent superconductor — Covalent semiconductors are such solids as diamond, silicon, germanium, silicon carbide and silicon germanium where atoms are linked by covalent bonds. Most of those materials, at least in their bulk form, are well studied and rarely hit the… …
128KABBALAH — This entry is arranged according to the following outline: introduction general notes terms used for kabbalah the historical development of the kabbalah the early beginnings of mysticism and esotericism apocalyptic esotericism and merkabah… …
