coal tar derivative
11Diffusion of technology in Canada — This article outlines the history of the diffusion or spread of technology in Canada. Technologies chosen for treatment here include, in rough order, transportation, communication, energy, materials, industry, public works, public services… …
12wood — wood1 woodless, adj. /wood/, n. 1. the hard, fibrous substance composing most of the stem and branches of a tree or shrub, and lying beneath the bark; the xylem. 2. the trunks or main stems of trees as suitable for architectural and other… …
13Wood — /wood/, n. 1. Grant, 1892 1942, U.S. painter. 2. Leonard, 1860 1927, U.S. military doctor and political administrator. * * * I Hard, fibrous material formed by the accumulation of secondary xylem produced by the vascular cambium. It is the… …
14technology, 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… …
15phenol — phenolic /fi noh lik, nol ik/, adj. /fee nawl, nol/, n. Chem. 1. Also called carbolic acid, hydroxybenzene, oxybenzene, phenylic acid. a white, crystalline, water soluble, poisonous mass, C6H5OH, obtained from coal tar, or a hydroxyl derivative… …
16Benzene — For other uses, see Benzene (disambiguation). See also: Benzole Benzene …
17Acridine — Chembox new ImageFile=Acridine chemical structure.png ImageSize=250px IUPACName=Acridine OtherNames= Section1= Chembox Identifiers CASNo=260 94 6 PubChem=9215 SMILES=C1=CC=C2C(=C1)C=C3C=CC=CC3=N2 Section2= Chembox Properties C=13|H=9|N=1… …
18Isoquinoline — Chembox new Name = Isoquinoline ImageFile = Isoquinoline chemical structure.png ImageSize = 450px ImageName = Chemical structure of Isoquinoline IUPACName = Isoquinoline OtherNames = benzo [c] pyridine, 2 benzanine Section1 = Chembox Identifiers… …
19Benzofuran — This article is about the heterocyclic chemical compound. For its purportedly recreational derivative drug, nicknamed Benzo Fury , see 6 APB. Benzofuran IUPAC name …
20toluene — /tol yooh een /, n. Chem. a colorless, water insoluble, flammable liquid, C7H8, having a benzenelike odor, obtained chiefly from coal tar and petroleum: used as a solvent in the manufacture of benzoic acid, benzaldehyde, TNT, and other organic… …
