Journal . Uphioxylin. W. Bcttiuk. Nieuw. Tijdsch. 18S8, 1. is the name given by the author to a crystallinesubstance which occurs together with a volatile pungent oiland a tannin matter iu the root of serp*ittitiium,one of the Indian Apocynea. It forms orange-yellowtetragonal crystals, which have a sharp burning taste, andw hich are difficultly soluble iu water, more easily in alcohol,and very readily soluble in chloroform, benzene, and carbonbisulphide. The empirical formula is CielliiOg; in itsproperties and reactions ophioxylin resembles juglone, b
Journal . Uphioxylin. W. Bcttiuk. Nieuw. Tijdsch. 18S8, 1. is the name given by the author to a crystallinesubstance which occurs together with a volatile pungent oiland a tannin matter iu the root of serp*ittitiium,one of the Indian Apocynea. It forms orange-yellowtetragonal crystals, which have a sharp burning taste, andw hich are difficultly soluble iu water, more easily in alcohol,and very readily soluble in chloroform, benzene, and carbonbisulphide. The empirical formula is CielliiOg; in itsproperties and reactions ophioxylin resembles juglone, butdiffers from the latter in its melting point, 71°8, juglonemelting at 151—154.—C. A. K. The rind (Fig. 1) of the root consists of a thin layer ofcork consisting of rather large i-ells, which covers a laverof large cells arranpeil tangentially, in which a few cellsare of horny appearance. The bast (Fig. 2) as well a» the Vis. 2. nfliftS. rind of the stalk are much 6rmer; the pith consists of1—2 rows of cells arranged somewhat radially ; the bastfibres, which consist of larger groups, are porous andthickened to a narrow bore; Siindy crystals of calciumoxalate occur in individual cells in the pith as well as in rig. 3.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
