amorphous alumina
41Glass ionomer cement — A Glass Ionomer Cement (GIC) is one of a class of materials commonly used in dentistry as filling materials and luting cements. These materials are based on the reaction of silicate glass powder and polyalkeonic acid. These tooth coloured… …
42Grain boundary strengthening — (or Hall Petch strengthening) is a method of strengthening materials by changing their average crystallite (grain) size. It is based on the observation that grain boundaries impede dislocation movement and that the number of dislocations within a …
43clay mineral — any of a group of hydrous aluminum silicate minerals, as kaolinite, illite, and montmorillonite, that constitute the major portion of most clays. [1945 50] * * * Any of a group of important hydrous aluminum silicates with a layered structure and… …
44glass — A transparent substance composed of silica and oxides of various bases. [A.S. glaes] cover g. a thin g. disk or plate covering an object examined under the microscope. SYN: coverslip. Crookes g. a spectacle lens combined with …
45Saponite — Sap o*nite, n. [Sw. saponit, fr. L. sapo, onis, soap.] (Min.) A hydrous silicate of magnesia and alumina. It occurs in soft, soapy, amorphous masses, filling veins in serpentine and cavities in trap rock. [1913 Webster] …
46Guanine — chembox ImageFile1 = Guanine chemical structure.png ImageSize1 = 150px ImageFileL2 = Guanine 3D balls.png ImageSizeL2 = 100px ImageFileR2 = Guanine 3D vdW.png ImageSizeR2 = 100px IUPACName = 2 amino 1 H purin 6(9 H ) one OtherNames = 2 amino 6… …
47Water fluoridation — Fluoridation does not affect the appearance, taste or smell of drinking water.[1] Water fluoridation is the controlled addition of fluoride to a public water supply to reduce tooth decay. Fluoridated water has flu …
48Mellitic acid — Mellitic acid[1] IUPAC name Benzene 1,2,3,4,5,6 h …
49Optical fiber — A bundle of optical fibers A TOSLINK fiber optic audio c …
50Electron beam physical vapor deposition — or EBPVD is a form of physical vapor deposition in which a target anode is bombarded with an electron beam given off by a charged tungsten filament under high vacuum. The electron beam causes atoms from the target to transform into the gaseous… …
