• JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
  • JoomlaWorks Simple Image Rotator
 
  Bookmark and Share
 
 
Master's Dissertation
DOI
https://doi.org/10.11606/D.75.2009.tde-11032010-111805
Document
Author
Full name
Suzi Oliveira Marques
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2009
Supervisor
Committee
Berlinck, Roberto Gomes de Souza (President)
Burtoloso, Antonio Carlos Bender
Furlan, Maysa
Title in Portuguese
Estudo químico da esponja Dysidea robusta
Keywords in Portuguese
Dysidea
Ceramida
HPLC-PDA-MS
Metabólito secundário
Abstract in Portuguese
Esponjas do gênero Dysidea (Ordem: Dictyoceratida) caracterizam-se por apresentarem grande diversidade de metabólitos secundários, muitos dos quais apresentam potentes atividades biológicas. Este trabalho descreve o estudo de duas amostras de esponjas da espécie Dysidea robusta, DR1 e DR2, coletadas no litoral da Bahia em 1999. Tal estudo consistiu no fracionamento das amostras, nas análises de seus extratos brutos por LC-MS e técnicas de RMN- mono e bidimensionais. Dentre os extratos de DR1, a fração DR1-EP-5A obtida do extrato éter de petróleo apresentou uma mistura de três ceramidas saturadas (22, 23 e 24). Já da amostra DR2, as frações do extrato aquoso DR2-AQ-6B e DR2-AQ-6D mostraram ser constituídas por derivados do ácido pirodisinóico (18, 19, 20 e 21). Com exceção do ácido pirodisinóico (18), os demais compostos isolados ainda não foram relatados na literatura.
Title in English
Chemical study of the brazilian sponge Dysidea robusta
Keywords in English
Dysidea
Ceramides
HPLC-PDA-MS
Secondary metabolite
Abstract in English
Sponges of the genus Dysidea (Order: Dyctioceratida) are characterized as sources of several biologically active secondary metabolites. This work describes the study of two samples of D.robusta, DR1 and DR2, both collected at the Bahia state coastline, in 1999. The investigation aimed the crude extract fractionation and analysis by LC-MS and by 1D and 2D NMR techniques. Among the extracts DR1, the fraction DR1-EP-5A obtained from the petroleum ether extract showed a mixture of three saturated ceramides, represented by 22, 23 and 24. From the DR2 sample, the fractions obtained from the aqueous extract DR2-AQ-6B and -6D presented pirodisinoic acid derivates 18, 19, 20 and 21. Except for pyrodisinoic acid (18), all other isolated compounds haven´t been reported in the literature yet.
 
WARNING - Viewing this document is conditioned on your acceptance of the following terms of use:
This document is only for private use for research and teaching activities. Reproduction for commercial use is forbidden. This rights cover the whole data about this document as well as its contents. Any uses or copies of this document in whole or in part must include the author's name.
Publishing Date
2010-08-17
 
WARNING: Learn what derived works are clicking here.
All rights of the thesis/dissertation are from the authors
CeTI-SC/STI
Digital Library of Theses and Dissertations of USP. Copyright © 2001-2024. All rights reserved.