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Tri Murningsih
Bidang Botani, Pusat Penelitian Biologi-LIPI
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology

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AKTIVITAS ANTIOKSIDAN DAN ANALISIS KIMIA EKSTRAK DAUN JUNGRAHAB (Baeckeafrutescens L.) Tri Murningsih
BERITA BIOLOGI Vol 10, No 1 (2010)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v10i1.2060

Abstract

Extraction of Jungrahab (Baeckea frutescens L.) leaves was done by using organic solvent (ether). The antioxidant activity of the extract was investigated using l,l-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging assay. Ascorbic acid (vitamin C) was employed as a positif control. By virtue of their hydrogen donating ability, the extract and ascorbic acid exhibited reducing power.The extract was found has activity in free radical scavenging activity against DPPH. The antioxidant activity was supposed to be due to the composition of certain constituens e.g. 2,6-di(/-buthyl)-4-hidroxybenzoie acid (BHT-acid), 5,7-dihydroxy-6-methylflavanone and a-tocopherol (vitamin E) within the extract.
METIL EUGENOL, KHEMOTIPE DARIMINYAK ATSIRI Melaleuca spp. (MYRTACEAE) YANG TUMBUH DIKEBUN RAYA CIBODAS Tri Murningsih; Chairul Chairul; Emma Sri Kuncari
BERITA BIOLOGI Vol 9, No 6 (2009)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14203/beritabiologi.v9i6.859

Abstract

The essential oils of the fresh leaves of Melaleuca spp. (M. alternifolia Cheel, M. ericifolia Sm., M. squarrosa Donn, and M.genistifolia Sm.) from Cibodas Botanical Garden, Indonesia were isolated by a hydrodistillation method and analysed by a gas chromatography/mass spectrometry (GC/MS) technique. The various Melaleuca species showed differences within their relative essential oil compositions. The oils from all samples were of the methyl eugenol (10.30-71.25%) chemotype. The others major constituent were terpinen-4-ol (38.49%), linalool (19.65%) and bis(2-ethylhexyl)phtalate (66.09%) in the M. alternifolia, M. ericifolia, and M. genistifolia respectively.
Co-Authors Chairul Chairul Emma Sri Kuncari