00000ctm a22000007a 4500 UP-1685523046125413706 Buklod 20230503092606.0 m |o d | ta 071031s xx d r |||| u| (iLib)UPMNL-00000055053 UPM PHARM eng LG 996 1977 P4 O45 Oliveros, Mildred Balbin 1943- Chemical and morphological studies on Zingiber zerumbet (Linn.) Smith and its proposed variety Mildred Balbin-Oliveros. 65 leaves Available to the general public. Thesis (Doctor of Philosophy in Pharmacy)--University of the Philippines, 1977. This study on the chemistry of the essential oils and morphology of Zingiber zerumbet (L.)Sm. and its proposed variety reveals significant differences between these 2 plants. Their main chemical differences are the following: dried rhizomes of Zingiber zerumbet (L.)Sm. yield an essential oil which is dextrorotatory, congealing at 3(degrees C), and having zerumbone as its main constituent. Rhizomes of the proposed variety yield an oil which is levorotatory, congealing at -27(degrees C), and having 4-terpinenol as its main constituent. The morphological differences between Zingiber zerumbet (L.) Smith and its proposed variety are the following: Zingiber zerumbet (L.)Sm. has ovate lanceolate leaves, about 5 times longer than wide; a prominent ligule, about 1.5 to 3.5 cm long; an inflorescence which is avoid to oblong with an obtuse apex; bracts which are green, pink-edged, abovate mucronate; pale-yellow rhizomes; and oil cells measuring from 30-90 u. The proposed variety, on the other hand, has oblong lanceolate leaves, about 8 times longer than wide; a small ligule, about 1 to 2 mm long; a cone-like inflorescence with an acute apex; obovate acute bracts which are brownish-purple and green-edged; yellow-orange rhizomes; and oil cells measuring from 50-136 u. On the strength of these chemical and morphological differences, it is proposed that the other plant be classified as a variety of Zingiber zerumbet (L.) Sm. Plants Analysis. Ginger. FI UP UPMNL PHARM LG 996 1977 P4 O45 UPMNL UPMNL-MAIN LG 996 1977 P4 O45 Thesis