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Abstract
Extractions of medicinally useful materials from the rhizome of Alpinia calcarata Rosc. separately through solvents of decreasing polarities, viz., water, ethanol, diethyl ether and petroleum ether are also carried out. In the rhizome of A. calcarata the water extract has maximum yield.Odours vary in differently extracted materials. Diethyl ether and petroleum ether extracted materials show a sufficientdegree of unsaturation. All of the solvent extracted materials are dextro rotatory. Specific gravities, refractive indices, acid, saponification and iodine values of these variously extracted materials are also reported. Tests for the presence of specific natural products indicate the presence of steroids and flavonoids in most of the materials. Some of them possess carbohydrates also.
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References
- Abeywickrama K, AdhikariAACK, Paranagama P and Ganage CSP, 2006, The efiicacy of essential oil of Alpiniacalcarata (Rosc.) and its major constituent, 1,8-cineole, as protectants of cowpea against Callosobruchusmaculatus (F.) (Coleptera: bruchidae), Canad J Plant Sc, 86(3): 821-827.
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- Guenther E, 1963, The Essential Oils,Vol. II., D. Van Nostrand Company, U. S. A.
- I S: 548, 1984, Indian Standards Institution, Part-1, New Delhi.
- Pullaiah T, 2006, Encyclopedia of World Medicinal Plants, Regency Publications,Vol. 1., New Delhi, p. 124.
- Kong L, Qin M and Niwa M, 2004, Two new bis-labdanicditerpenoids from Alpiniacalcarata, Acta Bot Sin, 46(2), 159-164.
- The Wealth of India, 1985, A Dictionary of Indian Raw Materials & Industrial Products, Vol.1:A, CSIR, New Delhi, p. 198.
References
Abeywickrama K, AdhikariAACK, Paranagama P and Ganage CSP, 2006, The efiicacy of essential oil of Alpiniacalcarata (Rosc.) and its major constituent, 1,8-cineole, as protectants of cowpea against Callosobruchusmaculatus (F.) (Coleptera: bruchidae), Canad J Plant Sc, 86(3): 821-827.
Garratt DC, 1964, Vol. III, The Quantitative Analysis of Drugs, Chapman Hall International, London.
Guenther E, 1963, The Essential Oils,Vol. II., D. Van Nostrand Company, U. S. A.
I S: 548, 1984, Indian Standards Institution, Part-1, New Delhi.
Pullaiah T, 2006, Encyclopedia of World Medicinal Plants, Regency Publications,Vol. 1., New Delhi, p. 124.
Kong L, Qin M and Niwa M, 2004, Two new bis-labdanicditerpenoids from Alpiniacalcarata, Acta Bot Sin, 46(2), 159-164.
The Wealth of India, 1985, A Dictionary of Indian Raw Materials & Industrial Products, Vol.1:A, CSIR, New Delhi, p. 198.