Zobrazeno 1 - 10 of 56 pro vyhledávání: '"Fernando, Hallwass"'
1
Akademický článek
Development of active PHB/PEG antimicrobial films incorporating clove essential oil
Autor: Ivo Diego de Lima Silva, Michelle Félix de Andrade, Viviane Fonseca Caetano, Fernando Hallwass, Andréa Monteiro Santana Silva Brito, Glória Maria Vinhas
Publikováno v: Polímeros, Vol 30, Iss 2 (2020)
Abstract In this work were developed and evaluated new antimicrobial films of polyhydroxybutyrate (PHB) additivated with polyethyleneglycol (PEG) and clove essential oil (CEO). The PHB/PEG/CEO films were prepared using the solution casting technique.
Externí odkaz: https://doaj.org/article/397274d366d64bc4bf4809add153ddf3
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2
Residual dipolar couplings as a tool for structural analysis of ionic liquids
Autor: Higor D. F. de Melo, Daiane S. Carvalho, Fernando Hallwass, Ulrich Sternberg, Armando Navarro-Vázquez
Publikováno v: Chemical Communications. 59:4806-4809
Swelling of an acrylonitrile/N-N-dimethylacrylamide copolymer in ionic liquids provides residual dipolar couplings which are applied to conformational analysis of the bulk ionic liquid.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::04851cd1d513e537ef4342bdb8752bd3
https://doi.org/10.1039/d3cc00929g
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5
Akademický článek
ATRIBUIÇÃO DA ESTEREOQUÍMICA DA α-SANTONINA ATRAVÉS DAS MEDIDAS DO ACOPLAMENTO DIPOLAR RESIDUAL
Autor: Rubens R. Teles, José A. A. França, Armando Navarro-Vázquez, Fernando Hallwass
Publikováno v: Química Nova, Vol 38, Iss 10, Pp 1345-1350 (2015)
The measurement of nuclear magnetic resonance parameters in an anisotropic media, such as residual dipolar coupling (RDC), has proven to be an excellent methodology for the refinement of chemical structures, being used as a complementary tool in the
Externí odkaz: https://doaj.org/article/307493b8b9b644f3979090f454fdd74f
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6
Avaliação do potencial antioxidante e antimicriobiano do extrato de angico-de-caroço em filmes de quitosana
Autor: Viviane Fonseca Caetano, Janilson Silvestre da Hora, Ivo Diego de Lima Silva, Fernando Hallwass, Glória Maria Vinhas
Publikováno v: Revista Brasileira de Agrotecnologia. 11:21-24
A quitosana é um biopolímero atóxico, biodegradável e biocompatível obtido a partir da reação de desacetilação da quitina. É um polímero que tem grande potencial para ser utilizado como matriz polimérica para fins de embalagens ativas ali
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2fb0564fbe6c5fd57cf9c1780fadeb5a
https://doi.org/10.18378/rebagro.v12i2.8972
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8
Single experiment measurement of residual dipolar couplings in aqueous solution using a biphasic bisperylene imide chromonic liquid crystal
Autor: Danilo G.B. da Silva, Fernando Hallwass, Armando Navarro-Vázquez
Publikováno v: Magnetic Resonance in Chemistry. 59:408-413
The use of the biphasic isotropic/nematic region in a bisperylene imide-based lyotropic liquid crystal system allows the extraction of proton-carbon 1 DCH residual dipolar couplings in aqueous solution from a single F1-coupled HSQC experiment. The me
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a2c235fc3a707e7b81c2e1e896fd11e6
https://doi.org/10.1002/mrc.5120
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9
Akademický článek
Aqueous Barbier Allylation of Aldehydes Mediated by Tin
Autor: Ivani Malvestiti, Lothar W. Bieber, Marcelo Navarro, Fernando Hallwass, Lívia N. Cavalcanti, Maria Ester S. B. Barros, Dimas J. P. Lima, Ricardo L. Guimarães
Publikováno v: Molecules, Vol 12, Iss 9, Pp 2089-2105 (2007)
The aqueous tin-mediated Barbier reaction affords good to excellent yields and moderate syn diastereoselectivity under basic and acidic conditions. The high yields and stereoselectivity observed in the case of o-substituted aldehydes suggest a cyclic
Externí odkaz: https://doaj.org/article/c3d0c553e5d04170acaab3397125f70e
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10
Akademický článek
Aplicação de análise de componentes principais para verificação de atribuições de sinais nos espetros de RMN ¹H: o caso dos 3-aril (1,2,4)-oxadiazol-5-carboidrazida benzilidenos Principal component analysis for verifying ¹H NMR spectral assignments: the case of 3-aryl (1,2,4)-oxadiazol-5-carbohydrazide benzylidenes
Autor: João Bosco P. da Silva, Ivani Malvestiti, Fernando Hallwass, Mozart N. Ramos, Lúcia F. C. da Costa Leite, Eliezer J. Barreiro
Publikováno v: Química Nova, Vol 28, Iss 3, Pp 492-496 (2005)
The ¹H NMR data set of a series of 3-aryl (1,2,4)-oxadiazol-5-carbohydrazide benzylidene derivatives synthesized in our group was analyzed using the chemometric technique of principal component analysis (PCA). Using the original ¹H NMR data PCA all
Externí odkaz: https://doaj.org/article/2301764b92384cff8c66ea6663301f7f
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