MARA TANIA SILVA ALCANTARA
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Artigo IPEN-doc 24184 Effect of gamma radiation on polyvinylpyrrolidone hydrogels2017 - OLIVEIRA, M.J.A.; VASQUEZ, P.A.S.; ALCANTARA, M.T.S.; MUNHOZ, M.M.L.; LUGAO, A.B.Polyvinylpyrrolidone (PVP) hydrogels have been investigated as drug delivery matrices for the treatment of wounds, such as cutaneous leishmaniasis, and matrices with silver nanoparticles for chronic wounds and burns. The preparation of such hydrogels can occur by various cross-linking methods, such as gamma, chemical, physical, among others. The most feasible for wound dressings is gamma irradiation from cobalt-60, because gamma irradiation simultaneously promotes crosslinking and sterilization, leaving the wound dressing ready for use. The objective of this work was to investigate the effect on physico- chemical properties of gamma radiation on PVP hydrogel according to the radiation absorbed dose variation. The PVP hydrogels were irradiated with doses of 5, 15, 25, 35, 45, 55, 65, 75 and 95kGy at dose rate of 5 kGy/h and characterized by swelling, thermogravimetric and mechanical analysis. Results shown a favorable dose range window for processing of these hydrogels related to the application. The results showed that mechanical strength was affected at doses starting at 25 kGy.Resumo IPEN-doc 16197 Hydrogel: the influence of oxygen on the properties of PVP membranes2009 - ALCANTARA, M.T.S.; LUGAO, A.B.The aim of this study is to verify the influence of dissolved oxygen on the synthesis of PVP hydrogels membranes. The hydrogels were prepared in different conditions (i.e., with oxygen dissolved and replacing the oxygen dissolved by nitrogen). The samples were crosslinked by gamma rays. The gel fraction and swelling kinetic in hydrogels membranes were analyzed to study the influence of natural oxygen in membranes prepared. The swelling results showed large differences on cross linking densities from samples irradiated with and without oxygen, however no difference was verified on gel fraction.Artigo IPEN-doc 10629 Estudo da reticulacao induzida por radiacao ionizante de poli(vinil pirrolidona)(PVP)/carboximetil celulose (CMC)2005 - ALCANTARA, M.T.S.; CHIRINOS, H.; AMARAL, R.H.; ROGERO, S.O.; LUGAO, A.B.Artigo IPEN-doc 19590 Estudo das propriedades mecânicas de hidrógeis utilizando planejamento experimental2013 - ALCANTARA, MARA T.S.; TAQUEDA, MARIA E.S.; GIANNINI, DANIELLE R.; BRANT, ANTONIO J.C.; RIELLA, HUMBERTO G.; LUGAO, ADEMAR B.Artigo IPEN-doc 15157 The influence of water quality on properties of hydrogel membranes prapared by ionizing radiation2009 - ALCANTARA, MARA T.S.; SISTI, CRISTINA; FURUSAWA, HELIO A.; LUGAO, ADEMARArtigo IPEN-doc 17084 Effect of different plasticizers on poly(N-vinyl-2-pyrroplidone) hydrogels cross-linked by radiation2011 - ALCANTARA, MARA T.S.; GIANNINI, DANIELLE R.; BRANT, ANTONIO J.C.; RIELLA, HUMBERTO G.; LUGAO, ADEMAR B.