Browsing by Subject "Chitosan"

Avaliação da atividade antimicrobiana de nanopartículas de cobre, prata e bimetálicas cobre/prata incorporadas em quitosana

Videira, Vanessa de Cassia Gomes [UNIFESP] (Universidade Federal de São Paulo, 2022-11-21)

As infecções microbianas tem sido um problema recorrente mesmo na era moderna dos antibióticos. Neste sentido, o uso de nanomateriais, em especial nanopartículas metálicas como prata e cobre têm sido avaliadas. Estes metais ...

Chitosan Cross-Linked Pentasodium Tripolyphosphate Micro/Nanoparticles Produced by Ionotropic Gelation

Severino, Patricia; Silva, Classius F. da [UNIFESP]; da Silva, Mariana A.; Santana, Maria H. A.; Souto, Eliana B. (Springer India, 2016)

Chitosan cross-linked pentasodium tripolyphosphate particles were produced by ionotropic gelation. The aim of this study was to evaluate the influence of the molar mass and deacetylation degree of chitosan and of the ...

Chitosan Cross-Linked Pentasodium Tripolyphosphate Micro/Nanoparticles Produced by Ionotropic Gelation

Severino, Patricia; Silva, Classius F. da [UNIFESP]; da Silva, Mariana A.; Santana, Maria H. A.; Souto, Eliana B. (Springer India, 2016)

Chitosan cross-linked pentasodium tripolyphosphate particles were produced by ionotropic gelation. The aim of this study was to evaluate the influence of the molar mass and deacetylation degree of chitosan and of the ...

Chitosan does not inhibit enzymatic action of human pancreatic lipase in Langmuir monolayers of 1,2-didecanoyl-glycerol (DDG)

Souza, Adriano L.; Pavinatto, Felippe J.; Caseli, Luciano [UNIFESP]; Volpati, Diogo; Miranda, Paulo B.; Oliveira, Osvaldo N. (Elsevier B.V., 2014-11-01)

In this study, we tested the hypothesis according to which chitosan reduces lipid digestion by blocking the access of lipases to ingested fat. Because lipase action takes place mostly at interfaces, we produced Langmuir ...

Chitosan-solid lipid nanoparticles as carriers for topical delivery of tretinoin

Ridolfi, Daniela M.; Marcato, Priscyla D.; Justo, Giselle Z. [UNIFESP]; Cordi, Livia; Machado, Daisy; Duran, Nelson (Elsevier B.V., 2012-05-01)

Tretinoin (TRE) or all-trans retinoic acid is employed in the topical treatment of various skin diseases including acne and psoriasis. However, its use is strongly limited by side effects and high chemical instability. TRE ...

Controlled fabrication of gold nanoparticles biomediated by glucose oxidase immobilized on chitosan layer-by-layer films

Caseli, Luciano [UNIFESP]; Santos, David S. dos; Aroca, Ricardo F.; Oliveira, Osvaldo N. (Elsevier B.V., 2009-06-01)

The control of size and shape of metallic nanoparticles is a fundamental goal in nanochemistry, and crucial for applications exploiting nanoscale properties of materials. We present here an approach to the synthesis of ...

Desenvolvimento de filme baseado em enzima β-galactosidase através de imobilização com blenda polimérica para aplicação em biossensor

Rita, Samia Giordano Santa [UNIFESP] (Universidade Federal de São Paulo, 2023-05-25)

Biossensores são dispositivos que detectam um analito em uma determinada amostra. Esses materiais vêm sendo muito estudados por serem baratos, de fácil manejo e adaptáveis para diversas aplicações, desde a remoção de ...