Bitter principles stimulate the digestive system. Valerianic acid is sedative. The resin components, lupulon and humulon are antiseptic against Gram- positive bacteria. Asparagin is diuret ic Research suggested that the anti-
316 Hura crepitans Linn.
spasmodic effect is stronger than the sedative, and hops also possess antihistaminic and anti-oxytocic properties. (Cases of amenorrhoea and dysmenorrhoea are treated with hops.)
Hop extracts exert different effects on CNS in mice. They show hypothermic, hypnotic, sedative, muscle relaxing and spontaneous locomotor activities, besides potentiating pentobarbital anaesthesia in mice.
Humulone inhibited induced inflammation in mice.
The dried strobila containing humulone and lupulone showed antidiabetic activity in experimental rats.
Hop mash or extract is used in the preparation of toothpaste for inhibiting Gram-positive bacteria and in hair preparations for preventing dandruff formation. It is also used in skin- lightening creams.
Hura crepitans Linn.
Family b Euphorbiaceae.
Habitat Native to tropical America; introduced into India.
English Sandbox tree, Monkey Dinner-bell.
Action Seed, bark and fresh latex— emetocathartic, antileprotic. Seed— insecticidal, piscidal.
In South America, a poultice made from the latex is used for treating cutaneous leishmaniasis. Highly irritant and tumour-promoting deterpene esters (DTC) have been detected in the
latex. Latex gave the triterpenes, 24- methylene cycloartanol, cycloartanol and butyrospermol. Sap of the plant gave a diterpene hexaol ester, huratoxin, and a glycolipoprotein, crepitin.
Hydnocarpus kurzii (King) Warb.
Synonym H. heterophylla auct. non-Bl.
Taractogenos Kurzii King.
Habitat Assam and Tripura.
Ayurvedic Tuvaraka (related