首页> 外文学位 >Caracterizacion quimica de metabolitos aislados en un extracto con actividad antimicrobiana y antifungica de la ascidia Rhopalaea sp. proveniente del area de Cuajiniquil, Guanacaste, Costa Rica.
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Caracterizacion quimica de metabolitos aislados en un extracto con actividad antimicrobiana y antifungica de la ascidia Rhopalaea sp. proveniente del area de Cuajiniquil, Guanacaste, Costa Rica.

机译:海鞘Rhopalaea sp。中具有抗微生物和抗真菌活性的提取物中的分离代谢产物的化学表征。来自哥斯达黎加瓜纳卡斯特的Cuajiniquil地区。

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摘要

Marine ecosystems have a very large amount of resources, most of them are still partially unknown, and few have been exploited for development of new industrial and toxicological products. The objective of this investigation was to determine if ascidia Rhopalaea sp. from the Pacific coast of Costa Rica had these chemical defenses against the bacteria Staphylococcus aureus and fungi Geotrichum candidum, and if so, to determine their main secondary metabolites in the extract. Ascidian was collected from the zone of Cuajiniquil, Guanacaste, between December 2007 and March 2008. Activity evaluation against the Gram positive bacteria and fungi was performed on ethanolic (95%) and acetonic extracts. Both extracts showed activity against Geotrichum candidum but only the acetonic extract showed activity against Staphylococcus aureus. A coumarin and one hydroxyanthraquinone were isolated from a crude extract of Rhopalaea sp. as metabolites present in the active fraction. The purification and isolation were performed by chromatographic techniques and solid phase extraction. Structural information was obtained by spectroscopy analyses: Ultraviolet (UV-Visible), Fourier Transform Infrared (FT-IR), Liquid Chromatography Tandem Mass Spectrometry (LC/MS/MS), Gas Chromatography Mass Spectrometry (GC/MS), Nuclear Magnetic Resonance of Proton (1H-NMR), and Carbon-13 (13C-NMR). Further studies are necessary for a characterization of their active components of this extract and a possible elucidation of the mechanisms of action.
机译:海洋生态系统拥有大量资源,其中大多数仍然部分未知,并且很少被用于开发新的工业和毒理学产品。这项调查的目的是确定是否ascidia Rhopalaea sp.。来自哥斯达黎加太平洋沿岸的植物对金黄色葡萄球菌和真菌Geotrichum candidum具有化学防御作用,如果有的话,可以确定提取物中的主要次生代谢产物。在2007年12月至2008年3月之间,从瓜纳卡斯特(Guanacaste)的Cuajiniquil地区收集了海鞘。对乙醇(95%)和丙酮提取物进行了革兰氏阳性细菌和真菌的活性评估。两种提取物均显示出对念珠菌的活性,但仅丙酮提取物显示出对金黄色葡萄球菌的活性。从Rhopalaea sp。的粗提物中分离出香豆素和一种羟基蒽醌。作为活性部分中存在的代谢物。纯化和分离通过色谱技术和固相萃取进行。结构信息是通过光谱分析获得的:紫外线(UV-可见),傅立叶变换红外(FT-IR),液相色谱串联质谱(LC / MS / MS),气相色谱质谱(GC / MS),核磁共振质子(1H-NMR)和碳-13(13C-NMR)。为了表征该提取物的活性成分并阐明其作用机理,有必要进行进一步的研究。

著录项

  • 作者

    Borbon Alpizar, Henry.;

  • 作者单位

    University of Puerto Rico, Mayaguez (Puerto Rico).;

  • 授予单位 University of Puerto Rico, Mayaguez (Puerto Rico).;
  • 学科 Chemistry Organic.
  • 学位 M.S.
  • 年度 2009
  • 页码 66 p.
  • 总页数 66
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 有机化学;
  • 关键词

  • 入库时间 2022-08-17 11:38:24

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