• Refine Query
  • Source
  • Publication year
  • to
  • Language
  • 1
  • Tagged with
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • 1
  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Caracteriza??o da composi??o qu?mica de extratos de boldos in natura e produtos comerciais derivados do boldo

Costa, Fernando Henrique Marques 14 June 2017 (has links)
Incluir como ag?ncias financiadoras: Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq); Funda??o de Amparo ? Pesquisa do Estado de Minas Gerais (FAPEMIG). / Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2018-03-08T19:58:06Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) fernando_henrique_marques_costa.pdf: 968489 bytes, checksum: 0df569b110148887e113292d0d960db5 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-03-09T18:48:31Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) fernando_henrique_marques_costa.pdf: 968489 bytes, checksum: 0df569b110148887e113292d0d960db5 (MD5) / Made available in DSpace on 2018-03-09T18:48:31Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) fernando_henrique_marques_costa.pdf: 968489 bytes, checksum: 0df569b110148887e113292d0d960db5 (MD5) Previous issue date: 2017 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (Capes) / Conselho Nacional de Desenvolvimento Cient?fico e Tecnol?gico (CNPq) / Funda??o de Amparo ? Pesquisa do estado de Minas Gerais (FAPEMIG) / O consumo popular do boldo (P. boldus) ? feito com fins medicamentosos para tratar problemas relacionados ao f?gado e a m? digest?o. Apesar de ser uma planta mundialmente conhecida, no Brasil outras esp?cies tamb?m recebem o nome de boldo, portanto ? comum a confus?o entre os seus v?rios tipos. Nesse contexto, o presente estudo objetiva estudar a composi??o qu?mica dos extratos de duas esp?cies de boldos (V. condensata e P. barbatus) e quatro produtos comerciais (boldo, eparema, hepatilon, e ch? de boldo) provenientes do P. boldus. Al?m disso, ? feita uma compara??o dos extratos com os produtos comerciais. As folhas das esp?cies V. condensata e P. barbatus foram submetidas ? macera??o para o preparo dos extratos aquoso (EA) em duas temperaturas (25 e 100 ?C), etan?lico (EE) e hex?nico (EH) na propor??o de 1:10 (amostra/solvente). Para o preparo dos produtos comerciais, cinco amostras de 10 mL de cada produto, de mesmo lote, foram misturadas e armazenadas em frasco ?mbar. Tanto os extratos preparados quanto os produtos comerciais foram secos em fluxo de ar e aquecimento para posterior derivatiza??o antes da an?lise por CG-EM. Os extratos polares foram os que extra?ram a maior quantidade de compostos, destacando-se os extratos aquosos que se assemelham aos produtos comerciais. Os carboidratos foram os compostos majorit?rios nas duas esp?cies e nos quatro produtos comerciais. Em rela??o aos ?cidos graxos, estes foram identificados em maiores quantidades nos extratos hex?nicos, e os compostos arom?ticos, apenas nos produtos comerciais. Ao final do estudo, concluiu-se que a t?cnica da derivatiza??o e posterior an?lise por CG-EM se mostrou eficiente na identifica??o de compostos presentes nas esp?cies do boldo e nos produtos comerciais que n?o foram encontrados na literatura. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Qu?mica, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2017. / The popular consumption of boldo (P. boldus) is made for medical purposes to treat problems related to liver and poor digestion. In spite of being a world-known plant, in Brazil other species also receive the name of Boldo, therefore is common the confusion between its several types. In this context, the present study aims to study the chemical composition of the extracts of two species of boldos (V. condensata and P. barbatus) and four commercial products (boldo, eparema, hepatilon, and boldo) from P. boldus. In addition a comparison of the extracts with the commercial products is made. The leaves of the species V. condensata and P. barbatus were submitted to maceration to prepare aqueous extracts (EA) at two temperatures (25 and 100 ? C), ethanolic (EE) and hexane (EH) in the ratio of 1:10 (Sample / solvent). For the preparation of the commercial products, five 10 ml samples of each product of the same batch were mixed and stored in an amber bottle. Both the prepared extracts and the commercial products were dried in air stream and heated for further derivatization prior to GC-MS analysis. The polar extracts were the ones that extracted the largest amount of compounds, standing out the aqueous extracts that resemble the commercial products. Carbohydrates were the major compounds in both species and in the four commercial products. In relation to fatty acids, these were identified in greater amounts in the hexane extracts, and the aromatic compounds, only in commercial products. At the end of the study, it was concluded that the technique of derivatization and subsequent analysis by CG-EM was efficient in identifying compounds present in Boldo species and in commercial products that were not found in the literature.

Page generated in 0.0399 seconds