Primary study on the components and main physico-chemical as well as biological properties of the oil of Alpinia galanga (L.) Wild in Phu Tho-Vietnam
2016; Academic Journals; Volume: 15; Issue: 48 Linguagem: Inglês
10.5897/ajb2016.15525
ISSN1684-5315
AutoresVan Loi Nguyen, Quynh Uyen Nguyen,
Tópico(s)Moringa oleifera research and applications
ResumoThe oil of Alpinia galanga (L.) Willd in Phu Tho was obtained by steam distillation and dried with Na2SO4. By Gas chromatography-mass spectrometry (GC-MS) method, 29 components in the oil were predicted by comparing their retention times and molecular weights with the standards’. In particular, there were 10 hydrocarbons such as monoterpenes: 29.15%, sesquiterpenes: 21.06%, and 19 oxygenated components like aldehydes (7.29%), alcohols (32.43%), ketones (1.09%), and esters (7.57%). Physico-chemical properties, antioxidant activities as well as antimicrobial activities of the oils were also analyzed. The density (at 20°C), acid index and ester index of the oil were 0.812 g/ml; 0.653 mg KOH/g and 0.728 mg KOH/g, respectively. The antioxidant activity was determined by using 1,1-diphenyl-2-picrylhydrazol (DPPH) radical percentage inhibition and it was 47.15±0.34%. Antimicrobial activity against Salmonella typhi, Bacillus cereus, Staphylococcus aureus and Escherichia coli of the oil was identified by agar diffusion method. Key words: Oil of Alpinia galangal (L.) Willd in Phu Tho-Vietnam, components, physico-chemical, biological activity.
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