The volume of excavation in cubic yards,
A by-product of the brewing industry. Spent yeasts are hydrolysed and concentrated to produce a food which is high in protein and B vitamins, and can be used as a flavour enhancer,
Theory of colour vision which proposes that the eye contains three systems of colour perception, with maximum response to three primary colours. It is the theory adopted for the realization of colour photography. There is little biochemical support for the theory, but the practice is justified by the physical possibility of matching practically every natural colour by the addition of contributions from three primary colours. See colour.
The basic substance from which it has been suggested that all known elements may have been derived through nucleogenesis fusion of fundamental particles to form nuclei. It would have a density of 1016 kgm-3, and would consist chiefly of neutrons.
A contagious tropical disease occurring in children living in hot humid climates, due to infection with Treponema pertenue, and characterized by raspberry-like papules on the skin; as in syphilis, the bones and joints may later become infected. Also framhoesia, pian.
Yellow jack. An acute infectious disease caused by a virus, conveyed to man by the bite of the Mosquito Aedes aegypti Stegomyia fasciata; characterized by high fever, acute hepatitis, jaundice, and haemorrhages in the skin and from the stomach and bowels; it occurs in tropical America and West Africa,
A heavy colourless, isotropic artificial gemstone that is used as a simulant for diamond. Abbrev YAG.
Scattering of particles by action of coulomb force.
A yellow powder which is the first stage in the production of uranium from ore concentrates, and is often produced at the mine itself. Approx composition U3O8.
In Oligochaeta, yellowish cells forming a layer investing the intestine and playing a role in connection with nitrogenous excretion; chloragen cells.