impurity atmosphere
41Polyethylene terephthalate — PETE redirects here. For the first name, see Peter (disambiguation). For other uses, see Pete (disambiguation). Polyethylene terephthalate fibre IUPAC name …
42Epitaxy — refers to the method of depositing a monocrystalline film on a monocrystalline substrate. The deposited film is denoted as epitaxial film or epitaxial layer. The term epitaxy comes from a Greek root ( epi above and taxis in ordered manner ) which …
43Precipitation hardening — Precipitation hardening, also called age hardening, is a heat treatment technique used to increase the yield strength of malleable materials, including most structural alloys of aluminium, magnesium, nickel and titanium, and some stainless steels …
44Persian Jews — ethnic group group=Iranian Jews poptime= Persian Jews 250,000 to 350,000 (est.) region1 = flagcountry|Israel pop1 = 135,000 200,000 (including Kurdish Iranian Jews) region2 = flagcountry|United States pop2 = 100,000 region3 = flagcountry|Iran… …
45Persistent carbene — A stable carbene: isolated 1,3 dimesitylimidazol 2 ylidene in a Schlenk flask (stir bar also present). A persistent carbene (also known as stable carbene or Arduengo carbene) is a type of carbene demonstrating particular stability. The best known …
46Spray forming — Spray forming, also known as spray casting, spray deposition[1] and in situ compaction,[2] is a method of casting near net shape metal components with homogeneous microstructures via the deposition of semi solid sprayed droplets onto a shaped… …
47History of the Jews in Iran — The beginnings of Jewish history in Iran date back to late biblical times. The biblical books of Isaiah, Daniel, Ezra, Nehemiah, Chronicles, and Esther contain references to the life and experiences of Jews in Persia. In the book of Ezra, the… …
48radio — /ray dee oh /, n., pl. radios, adj., v., radioed, radioing. n. 1. wireless telegraphy or telephony: speeches broadcast by radio. 2. an apparatus for receiving or transmitting radio broadcasts. 3. a message transmitted by radio. adj. 4. pertaining …
49Electrical resistivity and conductivity — This article is about electrical conductivity in general. For the specific conductance of aqueous solutions, see Conductivity (electrolytic). For other types of conductivity, see Conductivity. Electrical resistivity (also known as resistivity,… …
50DEMONS, DEMONOLOGY — A demon is an evil spirit, or devil, in the ordinary English usage of the term. This definition is, however, only approximate. In polytheistic religions the line between gods and demons is a shifting one: there are both good demons and gods who… …
