piperine

/pip-uh-reen, -er-in/US // ˈpɪp əˌrin, -ər ɪn //UK // (ˈpɪpəˌraɪn, -rɪn) //

胡椒碱,胡椒素,哌嗪,哌啶

Definitions

n.名词 noun

1
Chemistry.
- : a white, crystalline alkaloid, C17H19NO3, obtained from pepper and other piperaceous plants and also prepared synthetically: used as an insecticide.

Pepper owes its properties to an alkaloid, piperine, and to a volatile oil.
Piperine colours the sulphuric acid blood-red, and is turned dark-brown, almost black by the cerium oxide (Sonnenschein).
He has proved that the alkaloid so obtained is identical with that prepared from piperine.
One-half ounce balsam copaiba, one-quarter ounce liquorice powder, one-half drachm piperine.
It also contains a mere trace of piperina or piperine, one of the most valuable constituents of black pepper.