refractory heat shield
21Transformation (genetics) — An unrelated process called malignant transformation occurs in the progression of cancer. In molecular biology transformation is the genetic alteration of a cell resulting from the direct uptake, incorporation and expression of exogenous genetic… …
22lead processing — Introduction preparation of the ore for use in various products. Lead (Pb) is one of the oldest metals known, being one of seven metals used in the ancient world (the others are gold, silver, copper, iron, tin, and mercury). Its low… …
23Atomic hydrogen welding — (AHW) is an arc welding process that uses an arc between two metal tungsten electrodes in a shielding atmosphere of hydrogen. The process was invented by Irving Langmuir in the course of his studies of atomic hydrogen. The electric arc… …
24Nose cone — For the Transformers character, see Nosecone (Transformers). A nose cone that contained one of the Voyager spacecraft, mounted on top of a Titan III/Centaur launch vehicle …
25Egypt — /ee jipt/, n. 1. Arab Republic of. a republic in NE Africa. 64,791,891; 386,198 sq. mi. (1,000,252 sq. km). Cap.: Cairo. Arabic, Misr. Formerly (1958 71), United Arab Republic. 2. an ancient kingdom in NE Africa: divided into the Nile Delta… …
26Boron — (pronEng|ˈbɔərɒn) is a chemical element with atomic number 5 and the chemical symbol B. Boron is a trivalent nonmetallic element which occurs abundantly in the evaporite ores borax and ulexite. Boron is never found as a free element on… …
27Markyate Priory — One of the common seals of the Priory of Markyate Monastery information Order Benedictine Established 1145 …
28Perth — PERTH, a city, a royal burgh, and anciently the metropolis of the kingdom of Scotland, in the county of Perth, of which it is the capital; comprising the parishes of East Church, Middle Church, St. Paul, and West Church, and the late quoad… …
