repeated crystallization
101liquid — liquidly, adv. liquidness, n. /lik wid/, adj. 1. composed of molecules that move freely among themselves but do not tend to separate like those of gases; neither gaseous nor solid. 2. of, pertaining to, or consisting of liquids: a liquid diet. 3 …
102praseodymium — /pray zee oh dim ee euhm, pray see /, n. Chem. a rare earth, metallic, trivalent element, named from its green salts. Symbol: Pr; at. wt.: 140.91; at. no.: 59; sp. gr.: 6.77 at 20°C. [1880 85; < NL, equiv. to praseo (comb. form repr. Gk prásios… …
103zone melting — a process of purifying any of various metals and other materials, as germanium or silicon, by passing it in bar form through an induction coil. Also called zone refining. Cf. cage zone melting. [1955 60] * * * Any of a group of techniques used to …
104Haeckel, Ernst — ▪ German embryologist Introduction in full Ernst Heinrich Philipp August Haeckel born Feb. 16, 1834, Potsdam, Prussia [Germany] died Aug. 9, 1919, Jena, Ger. German zoologist and evolutionist who was a strong proponent of Darwinism and who… …
105industrial polymers, major — Introduction chemical compounds used in the manufacture of synthetic industrial materials. In the commercial production of plastics, elastomers, man made fibres, adhesives, and surface coatings, a tremendous variety of polymers are… …
106magnesium processing — Introduction preparation of the ore for use in various products. Magnesium (Mg) is a silvery white metal that is similar in appearance to aluminum but weighs one third less. With a density of only 1.738 grams per cubic centimetre, it… …
107Sharīʿah — ▪ Islamic law Introduction also spelled Sharia the fundamental religious concept of Islām, namely its law, systematized during the 2nd and 3rd centuries of the Muslim era (8th–9th centuries AD). Total and unqualified submission to the… …
108technology, history of — Introduction the development over time of systematic techniques for making and doing things. The term technology, a combination of the Greek technē, “art, craft,” with logos, “word, speech,” meant in Greece a discourse on the arts, both… …
109Pentateuch — • The name of the first five books of the Old Testament. Catholic Encyclopedia. Kevin Knight. 2006. Pentateuch Pentatuch † …
110threshold — 1. The point at which a stimulus first produces a sensation. 2. The lower limit of perception of a stimulus. 3. The minimal stimulus that produces excitation of any structure; e.g., the minimal stimulus eliciting a moto …
