Propolis propolis has approximately 50 constituents, primarily resins and vegetable balsams (50%), waxes (30%), essential oils (10%), and pollen (5%). Propolis also contains persistent lipophilic acaricides, a natural pesticide that deters mite infestations. In neotropical regions, in addition to a large variety of trees, bees may also gather resin from flowers in the genera "Clusia" and "Dalechampia", which are the only known plant genera that produce floral resins to attract pollinators. "Clusia" resin contains polyprenylated benzophenones. In some areas of Chile and Argentina Andean valleys, propolis contains viscidone, a terpene from "Baccharis" shrubs, and in Brazil and Paraguay, naphthoquinone epoxide has
Danny Dunn and the Universal Glue a pair of pants was worth the lesson." McGraw-Hill MacDonald and Jane's Archway Books Pocket Books Danny Dunn and the Universal Glue Danny Dunn and the Universal Glue is the fifteenth and final novel in the "Danny Dunn" series of juvenile science fiction/adventure books written by Raymond Abrashkin and Jay Williams. The book was first published in 1977. Professor Bullfinch develops a glue which is stronger than any known glue. He christens it "Irenium" in honor of Irene, of whom he is fond. The Blaze Chemical Company, which built a factory after draining a swamp, has leaked a chemical into