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KAJIAN FITOKIMIA Hopea mengarawan DAN IMPLIKASINYA PADA KEMOTAKSONOMI HOPEA Sahidin, Sahidin; Hakini, EuisH; Syah, Yana M; Juliawaty, Lia D; Achmad, Sjamsul A.; Din, Laily Bin; Latip, Jalifah
BERITA BIOLOGI Vol 8, No 2 (2006)
Publisher : Research Center for Biology-Indonesian Institute of Sciences

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1360.734 KB) | DOI: 10.14203/beritabiologi.v8i2.2036

Abstract

Nine resveratrol oligomers have been isolated from the stem bark of Hopea mengarawan i.e. diptoindonesin D (1), balanocarpol (2), ampelopsin A (3), hopeaphuran (4), heimiol A (5), parviflorol (6), a-viniferin (7), isohopeaphenol (8), and vaticanol B (9).The structures of these compounds were determined based on spectroscopic evidence such as UV, IR, 1-D, 2-D NMR and comparison with the reported data. Those compounds implied that Hopea tends to produce resveratrol dimers. Moreover, in subgenus level, besides ampelopsin A (3) and isohopeaphenol (9), resveratrol oligomers in H. mengarawan the same as in H.dryobalanoides. It indicated that H. mengarawan and H. dryobalanoid.es came from the same subgenus.
Time-Kill Assay of 4-Hydroxypanduratin A Isolated from Kaempferia Pandurata Against Foodborne Pathogens Soerya Dewi Marliyana; Didin Mujahidin; Yana M Syah; Yaya Rukayadi
Molekul Vol 12, No 2 (2017)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (402.658 KB) | DOI: 10.20884/1.jm.2017.12.2.363

Abstract

Time–kill assay was performed for 4-hydroxypanduratin A that was isolated from Kaempferia pandurata rizhome against four important foodborne pathogens, namely Bacillus cereus ATCC 21772, Bacillu subtilis ATCC 6633, Staphylococcus aureus ATCC 29737,  and  Proteus mirabilis ATCC 21100. The methods have been investigated in term of Minimum Inhibitory Concentration (MIC) and killing time curve using methods of Clinical and Laboratory Standards Institute (CLSI) guidelines. The results showed that 4-hydroxypanduratin A rapid acting in killing bacteria as follow: B. cereus : 1×MIC for 4 h, P. mirabilis: 4×MIC for 0.5 h, meanwhile  B. subtilis and S. aureus were 1×MIC for 2 h. In conclusion, 4-hydroxypanduratin A showed strong antimicrobial activity against four important foodborne pathogens.