Chemical Composition and Antimicrobial Activity of Essential Oil from the Rhizomes of Curcuma pambrosima Growing in Vietnam

Chemistry of Natural Compounds -     

Essential Oil Compositions and Antimicrobial Activity of the Leaves and Rhizomes of Alpinia calcicola from Vietnam

Chemistry of Natural Compounds -     

Essential oil constituents and biological activities of Peristrophe bicalyculata and Borreria verticillata

Peristrophe bicalyculata (Retz) Nees (Acanthaceae) or 'The Goddess of Mercy' and Borreria verticillata (L.) G.F.W. Mey., (Rubiaceae), or 'Irawo-Ile' (Yoruba, South-west, Nigeria), are annual herbs, which are poorly exploited. The volatile oils obtained by hydrodistillation in an all glass Clevenger-type apparatus from the plant samples have been investigated by gas chromatography-mass spectrometry (GC-MS). With respect to the oil of P. bicalyculata, beta-caryophyllene (33.9%), alpha-zingiberene (10.4%), germacrene D and globulol (5.0%) were the compounds occurring in abundance. The oil of B. verticillata had an abundance of phytol (56.3%) and 1, 8-cineole (20.4%), with sizeable proportions of alpha-pinene (7.1%) and p-cymene (4.0%). In addition, the volatile oils displayed promising in-vitro antimicrobial activity against the tested micro-organisms, (MIC 12.5-22.3 microg/mL), while only the oil of P. bicalyculata displayed in-vitro cytotoxicity to MCF-7 (human breast tumor) and MDA-MB-468 (human breast tumor) cells. The present investigation may be the first of its kind for the evaluation of the volatile oil constituents of the studied plants.     

Chemical Composition and Antimicrobial Activity of the Leaf Essential Oil of Vernonia solanifolia

Chemistry of Natural Compounds -