Propolis recently been isolated from red propolis, and prenylated acids such as 4-hydroxy-3,5-diprenyl cinnamic acid have been documented. An analysis of propolis from Henan, China found sinapinic acid, isoferulic acid, caffeic acid, and chrysin, with the first three compounds demonstrating antibacterial properties. Also, Brazilian red propolis, largely derived from "Dalbergia ecastaphyllum" plant resin, has high relative percentages of the isoflavonoids 3-hydroxy-8,9-dimethoxypterocarpan and medicarpin. Other flavonoids commonly present include galangin and pinocembrin. Caffeic acid phenethyl ester (CAPE) is also a component of some varieties of propolis from New Zealand. Occasionally, worker bees will even gather various caulking compounds of human manufacture, when
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