Epoxy resin may be reacted with itself in the presence of an anionic catalyst (a Lewis base such as tertiary amines or imidazoles) or a cationic catalyst (a Lewis acid such as a boron trifluoride complex) to form a cured network. This process is known as catalytic homopolymerisation.
A gorilla's lifespan is normally between 35 and 40 years, although zoo gorillas may live for 50 years or more. Colo, a female western gorilla at the Columbus Zoo and Aquarium was the oldest known gorilla, at 60 years of age when she died on January 17, 2017.
Gorillas, the largest living primates, make their homes in central and east Africa. They function in a well-developed social structure and often exhibit behavior and emotions similar to the human experience, including laughter and sadness. Poaching, disease and habitat destruction remain threats for gorillas, and WWF is working to designate new protected areas where populations can thrive.