| http://www.w3.org/ns/prov#value | - D., XLvn, 239) states that acacia contains an oxydase which gives colors when a ten per cent, solution of acacia is mixed with a one per cent, solution of carbolic acid, naphthol, pyrogallol, cresol, thymol, guaiacol, vanillin, pyra- midon, morphine, apomorphine, physostigmine, adrenalin, bar- baloin, tannin, preparations of tar, and other compounds.
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