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.
1 Bhut-in Indian lore, usually an evil ghost of a dead man who died through tragedy or execution (aka bhoot). 2  Black shuck-in British lore, a large, black, spectral dog that portends death. 3  Bogey-in English folklore, evil spirits that travel alone or together to do mischief. Kere-in Greek folklore, the spirit of a dead person that bothers the living. 2  Knocker-in Cornwallish folklore, a spirit that dwells in mines and can either be a help or hindrance. 3  Kobold-in Germanic lore, a spirit that can be pesky or even malevolant.