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Diversity and structural composition of species in dipterocarp forests:a study from Fasiakhali Wildlife Sanctuary, Bangladesh

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Journal of Forestry Research 2018年第5期29卷 1241-1249页

作者： S.C.Das M.S.Alam M.A.Hossain Institute of Forestry and Environmental Sciences University of Chittagong

Fasiakhali Wildlife Sanctuary is a protected area composed of tropical remnant rainforest that harbor substantial number of large,old Garjan（Dipterocarpus spp.）*** present study assessed composition,structure and diversity of the species in this protected area.A total of 32 trees species were recorded with DBH ≥ 11 cm belonging to 24 genera and 19 *** forest is low in plant diversity as represented by Shannon–Wiener diversity and Simpson Dominance *** turbinatus was the most dominant species with maximum relative density,frequency,dominance,and importance value *** firmum and Tectona grandis followed in terms of *** structural composition indicated higher number of individuals in the medium growth classes（41 to 〈 511 cm DBH and 16–20 m height ranges）,whereas *** was the only species that dominated most of the growth *** stem density in lower growth classes indicated meager recruitment of regeneration which may be due to lower annual precipitation,increased grazing and *** study will help to understand the patterns of tree species composition and diversity in the remnant dipterocarp forests of *** will also contribute to identifying threatened plants to undertake *** based conservation and sustainable management of the Fasiakhali Wildlife Sanctuary.

关键词： Species diversity structural composition Protected area Importance value index Cluster analysis

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structural composition of oligomeric and polymeric proanthocyanidins from diff erent parts of grape pomace

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Journal of Polyphenols 2020年第1期2卷 11-23页

作者： Marta de Sá Patrícia Martins Baoshan Sun Pólo Dois Portos Instituto Nacional de Investigação Agrária e VeterináriaI.P.Quinta da AlmoinhaDois Portos 2565-191Portugal Bioprocess Engineering AlgaePARCWageningen UniversityWageningen 6700 AANetherlands School of Functional Food and Wine Shenyang Pharmaceutical UniversityShenyang 110016China

Grape pomace is one of the most abundant solid by-products generated during winemaking,rich in bioactive compounds,i.e.,*** major objective of this work was to characterize structurally oligomeric and polymeric proanthocyanidins of diff erent parts of grape pomace(seed,skin,and stem).Column chromatography techniques were used to isolate oligomeric and polymeric proanthocyanidins fractions from diff erent parts of grape *** purifi ed grape seed proanthocyanidins were used to assess the effi ciency of the three most frequently-used acidic degradation methods,using benzyl mercaptan,phloroglucinol,and cysteamine as *** structural characterization of proanthocyanidins in the different parts of grape pomace was further performed by the phloroglucinolysis and ESI-MS *** results showed signifi cant diff erences in the structural composition of proanthocyanidins among diff erent parts of pomace.A positive correlation was found between the mean degree of polymerization and percentage of galloylation,in both oligomeric and polymeric *** results provided useful information for the preparation of diff erent proanthocyanidins products from grape pomace.

关键词： structural composition proanthocyanidins grape pomaces

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