INTERNAL-COMBUSTION; INTERNAL-COMBUSTION ENGINE a.
heat) of a comparatively heavy oil, as petroleum or kerosene. In all of these the gas is mixed with a definite amount of air, the charge is composed in the cylinder and is then exploded either by a flame of gas (flame ignition -- now little used), by a hot tube (tube ignition) or the like, by an electric spark (electr…
INVERT a.
d; converted; as, invert sugar. Invert sugar (Chem.), a variety of sugar, consisting of a mixture of dextrose and levulose, found naturally in fruits, and produced artificially by the inversion of cane sugar (sucrose); also, less properly, the grape sugar or dextrose obtained from starch. See Inversion, Dextrose, Levul…
KERATIN n.
A nitrogenous substance, or mixture of substances, containing sulphur in a loose state of combination, and forming the chemical basis of epidermal tissues, such as horn, hair, feathers, and the like. It is an insoluble substance, and, unlike elastin, is not dissolved even by gastric or pancreatic juice. By decompositio…
KNEAD v.
lly with the hands; esp., to work, as by repeated pressure with the knuckles, into a well mixed mass, as the materials of bread, cake, etc.; as, to knead dough. The kneading, the making of the cake, the heating of the oven, and the baking. Shak.