Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Valfredo T. Fávere"'
Publikováno v:
Química Nova, Vol 33, Iss 7, Pp 1476-1481 (2010)
The quaternary chitosan was synthesized by reaction of chitosan with glycidyl trimethylammonium chloride. it was characterized by infrared spectra and conductometric titration. Adsorption of reactive blue 4 (RB4) and reactive red 120 (RR120) by quate
Externí odkaz:
https://doaj.org/article/19dff9e6d3b047c4997b52f87a36109c
Publikováno v:
Polímeros, Vol 16, Iss 2, Pp 116-122 (2006)
The aim of this study was to impregnate the chelating agent 3,3-bis-N,N,bis-(carboxymethyl)aminomethyl-o-cresolsulfonephthalein in chitosan and to investigate the adsorption of Cu(II) ions. The chemical modification was confirmed by FTIR spectrometry
Externí odkaz:
https://doaj.org/article/4df11fb2489c42d3909dbfa33a96b1bf
Autor:
Rogério Laus, Mauro C. M. Laranjeira, Amarildo O. Martins, Valfredo T. Fávere, Rozângela C. Pedrosa, Jean C. Benassi, Reginaldo Geremias
Publikováno v:
Química Nova, Vol 29, Iss 1, Pp 34-39 (2006)
Externí odkaz:
https://doaj.org/article/60fdb8101e4c4eaa8b538ba9a0f62a84
Publikováno v:
Polímeros, Vol 15, Iss 3, Pp 218-223 (2005)
O sal quaternário de quitosana foi sintetizado com cloreto de glicidil trimetil amônio. A modificação química foi caracterizada por espectrometria no IV, RMN de 13C e ¹H, e mmol/g de grupos quaternários presentes na matriz polimérica por cond
Externí odkaz:
https://doaj.org/article/1c260f76b53a416ca58132dffa345472
Publikováno v:
Polímeros, Vol 15, Iss 1, Pp 6-12 (2005)
In this work chitosan microspheres were prepared by the simple coacervation method and crosslinked using epichlorhydrin or glutaraldehyde for the controlled release of diclofenac sodium. The effects of the crosslinking agents on chitosan microspheres
Externí odkaz:
https://doaj.org/article/1d2a76cec5b44b2b9cdc19afe55aa6bf
Publikováno v:
Anais da Academia Brasileira de Ciências, Vol 73, Iss 4, Pp 525-532 (2001)
Bioceramic composites were obtained from chitosan and hydroxyapatite pastes synthesized at physiological temperature according to two different syntheses approaches. Usual analytical techniques (X-ray diffraction analysis, Fourier transformed infrare
Externí odkaz:
https://doaj.org/article/71c0163bcc2a471587f2383a27251407
Autor:
Atche Josué, Mauro C. M. Laranjeira, Valfredo T. Fávere, Irene Yukiko Kimura, Rozangela C. Pedrosa
Publikováno v:
Polímeros, Vol 10, Iss 3, Pp 116-121 (2000)
Microesferas de quitosana com grau de desacetilação médio de 85,6% foram enxertadas com poli(ácido acrílico) para aplicação como sistemas de liberação controlada de fármacos. O corante eosina impregnado nas microesferas de quitosana modific
Externí odkaz:
https://doaj.org/article/20c7c69a9a7b4770b76ff9621260512f
Autor:
Fernando Antonio Simas Vaz, Valfredo T. Fávere, Gustavo Amadeu Micke, Jacqueline Pereira Vistuba, Marcone Augusto Leal de Oliveira, Ana Carolina Oliveira Costa, Luciano Vitali, Fabiana Della Betta
Publikováno v:
Talanta. 123:45-53
The aim of this study was to develop a new multilayer coating with crosslinked quaternary ammonium chitosan (hydroxypropyltrimethyl ammonium chloride chitosan; HACC) and κ-carrageenan for use in capillary electrophoresis. A new semi-permanent multil
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b510234359f249bc5e40329aa571e9e0
https://doi.org/10.1016/j.talanta.2014.01.047
https://doi.org/10.1016/j.talanta.2014.01.047
Autor:
Tiago Bortolotto, Reginaldo Geremias, Rozangela Curi Pedrosa, Valfredo T. Fávere, Danilo Wilhelm-Filho
Publikováno v:
Ecotoxicology and Environmental Safety. 79:116-121
The aim of this study was to evaluate the efficacy of the treatment of acid mine drainage (AMD) with calcinated coal mining waste using Allium cepa L. as a bioindicator. The pH values and the concentrations of aluminum, iron, manganese, zinc, copper,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e9342211a5451c9d966af5b058cc59e3
https://doi.org/10.1016/j.ecoenv.2011.12.010
https://doi.org/10.1016/j.ecoenv.2011.12.010
Publikováno v:
Chemistry and Ecology. 27:515-522
The common onion Allium cepa can be easily used in ecotoxicological bioassays to evaluate the bioavailability and adverse effects of pollutants and complex mixtures like waste, industrial effluent or coal-mining drainage that contain elevated levels
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::db20eb6513b7fdc887d2a9b251bd51b8
https://doi.org/10.1080/02757540.2011.602972
https://doi.org/10.1080/02757540.2011.602972