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Chemical constituents from the aerial parts of Musella lasiocarpa

Natural Products and Bioprospecting 2011年第1期1卷 41-47页

作者： Liao-Bin DONG Juan HE Xing-Yao LI Xing-De WU Xu DENG Gang XU Li-Yan PENG Yu ZHAO Yan LI Xun GONG Qin-Shi ZHAO State Key Laboratory of Phytochemistry and Plant Resources in West China Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China Graduate University of Chinese Academy of Sciences Beijing 100039China

Phytochemical investigation of the aerial parts of the monotypic plant,Musella lasiocarpa,led to the isolation of four rare bicyclic diarylheptanoids,musellarins B-E(2-5),two new phenylphenalenones,2-methoxy-9-(3′,4′-dihydroxyphenyl)-1H-phenalen-1-one(9),2-methoxy-9-(3′-methoxy-4′-hydroxyphenyl)-1H-phenalen-1-one(10),a new acenaphtylene derivative,trans-(1S,2S)-3-(4′-methoxyphenyl)-acenaphthene-1,2-diol(13),and two new sucrose esters,1,2′,3′,4′,6′-O-pentaacetyl-3-O-trans-p-coumaroylsucrose(16),1,2′,3′,4′,6′-O-pentaacetyl-3-O-cis-p-coumaroylsucrose(17),together with nine known *** addition,(4E,6E)-1-(3′,4′-dihydroxyphenyl)-7-(4′′-hydroxyphenyl)-hepta-4,6-dien-3-one(15)was isolated for the first time from a natural *** structures of new compounds were elucidated by analysis of their spectroscopic *** 2,6,8-10,12,and 14 were cytotoxic toward several of the human tumor cell lines(HL-60,SMMC-7721,A-549,MCF-7,and SW480).Of these,the new compound 9 was the most potent one,with IC50 values of 5.8,10.3,6.3,3.3,and 2.3μM,respectively.

关键词： monotypic diarylheptanoid phenylphenalenone acenaphtylene sucrose ester Musella lasiocarpa

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Small-Scale Spatial Patterns of <i>Copernicia alba</i>Morong near Bahia Negra, Paraguay

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Natural Resources 2013年第5期4卷 369-377页

作者： Michelle E. Cisz Michael J. Falkowski Blair Orr School of Forest Resources and Environmental Science Michigan Technological University Houghton USA

We assessed the spatial distribution of Copernicia alba Morong. In the study area, a lowland palm savanna floodplain, C. alba is the only overstory species. We hypothesized C. alba would be randomly distributed within natural stands. Palms were tallied in six randomly located 0.25 haplots and analyzed using a first-order, Ripley’s K function to assess the distribution of juvenile, adult, and total palm populations. While the total population had either aggregated or random distributions, when analyzing juvenile and adult population separately, we found juveniles were consistently more aggregated than the adults.

关键词： Ripley’s K-Function First Order Analysis Floodplain Fire Chaco monotypic Stands Disturbance Ecol-ogy Population Dynamics

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