Best example of positive feedback is the release of oxytocin during childbirth. Oxytocin is a reproductive hormone in females. Though it is also secreted in males, its function is yet unclear.
Brewing [edit]. In brewing, a carboy or demijohn is a glass or plastic vessel used in fermenting beverages such as wine, mead, cider, perry, and beer. Usually it is fitted with a rubber stopper and a fermentation lock to prevent bacteria and oxygen from entering during the fermentation process. 4.5 L (1.2 US gal) carboy is usually called a jug. A 57 L (15 US gal) carboy is usually called a demijohn (in the Philippines, dama juana. ). Demijohn is an old word that formerly referred to any glass vessel with a large body and small neck, enclosed in wickerwork.
Cujo is a small ghostly dog that appears in the episode Shades of Gray.. Though seemingly harmless, he can change from a cute little puppy into an enormous, rabid dog monster. Cujo is the ghost of a guard dog for Axion Industries. He came back to the human world in order to reclaim a squeaky toy he had left in the dog kennels. Cujo first appeared at Danny's school and, after transforming, ran off to Axion Industries, with Danny in hot pursuit.