thermal dissociation
81Zinc oxide — Other names Zinc white Calamine Identifiers …
82Photochromism — is the reversible transformation of a chemical species between two forms by the absorption of electromagnetic radiation, where the two forms have different absorption spectra. [ [http://pubs.acs.org/journals/chreay/thematic/00/photo.html Chemical …
83spectroscopy — spectroscopist /spek tros keuh pist/, n. /spek tros keuh pee, spek treuh skoh pee/, n. the science that deals with the use of the spectroscope and with spectrum analysis. [1865 70; SPECTRO + SCOPY] * * * Branch of analysis devoted to identifying… …
84nitrogen group element — ▪ chemical elements Introduction any of the chemical elements that constitute Group Va of the periodic table (see Figure >). The group consists of nitrogen (N), phosphorus (P), arsenic (As), antimony (Sb), and bismuth (Bi). The elements share… …
85Chemistry — For other uses, see Chemistry (disambiguation). Chemistry is the science of atomic matter (that made of chemical elements), its properties, structure, comp …
86Exhaust gas recirculation — (EGR) is a nitrogen oxide (NOx) emissions reduction technique used in most gasoline and diesel engines.EGR works by recirculating a portion of an engine s exhaust gas back to the engine cylinders. Intermixing the incoming air with recirculated… …
87Adiabatic flame temperature — In the study of combustion, there are two types of adiabatic flame temperature depending on how the process is completed: constant volume and constant pressure. The constant volume adiabatic flame temperature is the temperature that results from… …
88Copper-64 — 64Cu ATSM – copper (II) (diacetyl bis (N4 methylthiosemicarbazone)) – is being studied as a possible cancer therapy. Copper 64 is a radioactive nuclide of copper which has unique decay properties making it useful in nuclear medicine for both… …
89Langmuir, Irving — born Jan. 31, 1881, Brooklyn, N.Y., N.Y., U.S. died Aug. 16, 1957, Falmouth, Mass. U.S. physical chemist. He received a Ph.D. from the University of Göttingen, Ger. As a researcher for General Electric (1909–50), he investigated electrical… …
90organohalogen compound — Introduction any of a class of organic compounds (organic compound) that contain at least one halogen (halogen element) ( fluorine [F], chlorine [Cl], bromine [Br], or iodine [I]) bonded to carbon. They are subdivided into alkyl, vinylic, aryl,… …
