Showing papers by "Dedy Darnaedi published in 2006"
01 Jan 2006
7 citations
TL;DR: Three new resveratrol oligomers, cotylelophenol C (1) (resveratro tetramer) and cOTylelosides A (2) and B (3) (O-glucosides of resver atrol trimer) were isolated from an acetone soluble part of stem of Cotylelobium lanceolatum (Dipterocarpaceae).
Abstract: Three new resveratrol oligomers, cotylelophenol C (1) (resveratrol tetramer) and cotylelosides A (2) and B (3) (O-glucosides of resveratrol trimer), together with four known glucosides of resveratrol oligomers (vaticasides A, B, C, D) and piceid, were isolated from an acetone soluble part of stem of Cotylelobium lanceolatum (Dipterocarpaceae). The structures of new compounds were determined by spectral data analysis. The characteristic properties observed in the NMR spectra of 1 were also discussed.
6 citations
TL;DR: In this article, a phytochemical investigation of an acetone extract of Cotylelobium lanceolatum stem resulted in the isolation of two orange pigments-two stilbene trimer derivatives, cotylelophenols D and E and an artifact derivative, COTylel-ophenol F. The structure and relative configuration were confirmed by ID and 2D NMR spectral data.
Abstract: A phytochemical investigation of an acetone extract of Cotylelobium lanceolatum stem resulted in the isolation of two orange pigments-two stilbene trimer derivatives, cotylelophenols D and E and an artifact derivative, cotylelophenol F. The structure and relative configuration were confirmed by ID and 2D NMR spectral data. Cotylelophenols D and E are the first examples of stilbene oligomers bearing an epoxy group. The biogenetic relationships between the isolates are also discussed.
5 citations
01 Jan 2006
TL;DR: In this article, the authors investigated the interrelationshep between diversity of tree and bird species existed in urban forest of Bandar Lampung City and found that urban forest vegetation is generally dominated by domesticicated species.
Abstract: This study investigated the inter-relationshep between diversity of tree and bird species existed in urban forest of Bandar Lampung City. The objectives of the study on Tree and Bird Species Diversity in Several Urban Forest Area of Bandar Lampung City are to know a) tree species diversity composition in urban forest vegetation, b) bird species diversity, and c) the correlation between those both components. The study conducted on six areas of urban forest in Bandar Lampung City. Tree sampling was measured within plot line having 20 m x 20 m size, while bird observation was done using direct watching method which was performed every morning (06.00 ~ 08.00) and evening (16.00 ~ 18.00) during tree days for each urban forest area. The biodiversity parameters used in this study are Margalef Species Richness Index, Shannon Biodiversity Index, and Modified Hill’s Ratio Index of Evenness. In all urban forest areas of Bandar Lampung City was identified 45 tree species (24 families) with index of species richness 6.22, index of species diversity 2.92, and index of evenness 0.60. Compared to closest natural vegetation (of Wan Abdul Rachman Provincial Park) the vegetation is very different (index of similarity 0.13). The study concluded that a) urban forest vegetation of Bandar Lampung City are generally dominated by domesticated species, 2) 24 birds species (16 families) were identified in all of urban forest area of Bandar Lampung City, and c) there is positive correlation between the tree species diversity and bird species diversity in urban forest of Bandar Lampung City.
3 citations