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  • 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

Obten??o de sistemas macroemulsionados a partir de ?leos vegetais, para incorporar extrato seco de punica granatum

Abrantes, Antonio C?sar Nobre de 30 June 2016 (has links)
Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2017-01-03T18:22:01Z No. of bitstreams: 1 AntonioCesarNobreDeAbrantes_DISSERT.pdf: 2550671 bytes, checksum: cb02cd1401011998407d1b88ed485674 (MD5) / Approved for entry into archive by Arlan Eloi Leite Silva (eloihistoriador@yahoo.com.br) on 2017-01-04T20:35:17Z (GMT) No. of bitstreams: 1 AntonioCesarNobreDeAbrantes_DISSERT.pdf: 2550671 bytes, checksum: cb02cd1401011998407d1b88ed485674 (MD5) / Made available in DSpace on 2017-01-04T20:35:17Z (GMT). No. of bitstreams: 1 AntonioCesarNobreDeAbrantes_DISSERT.pdf: 2550671 bytes, checksum: cb02cd1401011998407d1b88ed485674 (MD5) Previous issue date: 2016-06-30 / As emuls?es s?o formula??es empregadas em diferentes segmentos da ind?stria, principalmente na ?rea aliment?cia, terap?uticas, cosm?ticas. Os ?leos de Linum usitatissimum e Sesamun indicum apresentam propriedades anti-inflamat?rias, em raz?o da presen?a de ?cidos graxos essenciais, podendo ter aplica??o na prepara??o de medicamentos pelo potencial farmacol?gico. O objetivo desse trabalho foi usar as propriedades farmacol?gicas do Punica granatum, como ativo, em sistema emulsionado, para aplica??o fitoter?pica. As emuls?es foram obtidas a partir de diagrama tern?rio utilizando a ?gua destilada como fase aquosa e a lecitina de Glycine max como tensoativo. Na prepara??o dos dois diagramas, na fase oleosa, utilizou-se os ?leos de Linum usitatissimum e Sesamun indicum. Nos diagramas obtidos, na regi?o de emuls?o do tipo O/A, foram escolhidos seis sistemas (tr?s em cada diagrama) por apresentar maior estabilidade. Os conservantes adicionados aos sistemas foram metilparabeno (Nipargin) e propilparabeno (Nipazol) e o estabilizador de emuls?es, hidrocol?ide Xanthan Gum (goma xantana). Da casca do vegetal Punica granatum foi obtido extrato aquoso, e em seguida liofilizado. Foram definidos tr?s percentuais (0,3%, 0,5% e 1,0%) de extrato liofilizado em cada sistema. Essas formula??es foram caracterizadas atrav?s das t?cnicas de medida pH, viscosidade, condutividade, estabilidade acelerada e estabilidade t?rmica. Antes de adicionar o bioativo foi empregada a espectrofotometria no Ultravioleta para quantificar o bioativo presente no p? da casca da rom?. A formula??es com a adi??o do extrato tiveram seus valores de pH diminu?dos e viscosidade aumentada quanto maior foi o percentual do extrato no meio. Isso se deve por que o extrato apresenta fen?is de car?ter ?cido e a quantidade maior de extrato no meio precisa de mais mol?culas para hidratar esse extrato, tornando o meio com menos ?gua livre. / Emulsions are formulations used in different industry segments, mainly in the food, pharmaceutical, cosmetic industry. The Linum usitatissimum and Sesamun indicum oils have anti-inflammatory properties, due to the presence of essential fatty acids and they can be applied in the preparation of drugs for the pharmacological potential. The aim of this study was to use the dried extract of Punica granatum to incorporate in the macro emulsified system, as active one, for herbal application. The emulsions were obtained from ternary diagram using distilled water as aqueous phase and Glycine max lecithin as surfactant. In preparing the two diagrams in the oil phase, the Linum usitatissimum and Sesamun indicum oils were used. In the diagrams obtained in the region of emulsion type O / A, they were selected six systems (three in the diagram) due to presenting greater stability. Preservatives added to systems were methylparaben (Nipagin?) and propylparaben (Nipazol?) and stabilizer of emulsions, hydrocolloid xanthan gum (xanthan gum). From peel Punica granatum plant, was obtained the aqueous extract, and then lyophilized. They have been defined three percentage (0.3%, 0.5% and 1.0%) of lyophilized extract in each system. These formulations were characterized by measuring pH techniques, viscosity, conductivity, accelerated stability and thermal stability. Before adding the bioactive was used the spectrophotometry in the ultravioleta and infrared to quantify the bioactive present in the pomegranate peel powder, and was also applied to the optical microscopy technique to determine the droplet size. The formulations with the addition of the dry extract of Punica granatum had their pH values decreased and viscosity increased as higher was the percentage of the extract in the medium. This happens because the extract has phenols of acid character and the largest amount of extract in the middle needs more molecules to hydrate this formulation, making the middle less free water.

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