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
Glue stick glue sticks. Generic brands like M&G also manufacture glue sticks, utilising the twist action. Glue sticks can come in many sizes, the most common being 8g, 25g, 36g, and 40g. Glue stick compositions are often proprietary, and vary by manufacturer and type. One style contains the following ingredients: The reportable composition of a Pritt Stick is as follows: Other brands are using e.g. polyvinylpyrrolidone as the glue substance. Glue stick Glue sticks are solid adhesives in twist or push-up tubes. The user can apply glue by holding the open tube, and keeping their fingers clean. Most glue sticks are designed