Gum-resins are solidified juices obtained from plants. They contain a gum, which is soluble in water, and a resin, which dissolves in spirit, so that the body usually is nearly quite soluble in dilute alcohol; but there are usually present in addition essential oil, and a variety of impurities. The gum-resins have frequently a strong and characteristic taste and smell. They are solid, opaque, and brittle. The common gum-resins are aloes, ammoniacum, asafoetida, bdellium, galbanum, gamboge, myrrh, olibanum, opoponax, sagapenum, and scammony. Research Gum-Resin
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Research Gum-Resin
