Diphenylene- methane oxide. Colourless plates, mp 98-5 'C.
The use of photographic film, often with an image intensifier screen, to record the intensities of X-rays which have passed through tissue in medicine or eg some mechanical structure in engineering. The X-rays are emitted by essentially a point source and the image is the shadow formed by the specimen.
Non-chemical photographic process in which light discharges a charged dielectric surface. It is the basis of most office photocopiers. An image is projected onto a drum whose surface is a charged dielectric. This is dusted with a dielectric polymer powder, which adheres to the charged areas, rendering the image visible. Permanent images can be obtained by transferring particles to a suitable backing surface eg paper or plastic and fixing, usually by heat. Used for document copying, for making lithographic surfaces, usually on paper, for small-offset printing and as a photoresist,
An electromagnetic wave of short wavelength ca 10
A compact high intensity discharge lamp, with the arc operating in a quartz envelope containing xenon gas at high pressure; widely used for motion picture projection,
A high-speed printer using xerographic techniques as in many photocopiers,
TN for a thermoplastic of the nitro
C6H4CH32, dimethylbenzenes. There are three isomers which all occur in coaltar but cannot be separated by fractional distillation: is an important starting material for polyester synthetic fibres such as Terylene. Commercial preparation termed xylol. Used, in micro
Symbols for the number of copies of the haploid chromosome number or basic chromosome set. x Chem Symbol for mole fraction.
A condition in which all skin pigments other than golden and yellow ones disappear, as in goldfish.