Browsing by Author "Urzúa Acevedo, Marcela"
Now showing items 1-16 of 16
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Bonardd, Sebastián; Saldías, César; Ramírez, Oscar; Radić, Deodato; Recio, Francisco J.; Urzúa Acevedo, Marcela; Leiva, Angel (Elsevier Ltd, 2019)A novel method to obtain catalytic bio-nanocomposites based on chitosan containing different amounts of gold nanoparticles generated in situ is reported. The formation of gold nanoparticles takes place in solid phase ...
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Briones, Ximena G.; Encinas, María V.; Petri, Denise F.S.; Pavez, Jorge E.; Tapia, Ricardo A.; Yazdani-Pedram Zobeiri, Mehrdad; Urzúa Acevedo, Marcela (2011)The adsorption of hydrophobically modified polyelectrolytes derived from poly(maleic anhydride-alt-styrene) (P(MA-alt-St)) containing in their side chain aryl-alkyl groups onto amino- or methyl-terminated silicon wafers ...
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González Navarrete, Javier; Toral Ponce, María; Leiva, Angel; Yazdani-Pedram Zobeiri, Mehrdad; Ríos, Hernán; Briones-Olarán, Ximena; Urzúa Acevedo, Marcela (Elsevier B.V., 2016)Adsorption of As (V) by poly (N-octyl-4-vinylpyridinium) bromide (P4VPyC8), used as solid phase, was studied. Determination of As (V) was carried out by direct measurement of the fluorescence intensity on the solid phase. ...
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Ríos, Hernán E.; Fonseca, Carla K.; Brito, Cristián; Urzúa Acevedo, Marcela; Cabrera, Walton J. (2006)The surface properties of poly(mono-n-alkylmaleate-alt-N-vinyl-2- pyrrolidone) sodium salts derivatives with n=8, 10, 12, 16, and 18 carbon atoms in the side chain were analyzed. The surface tension behavior suggests that ...
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Leal, M. S.; Briones, X.; Villalobos, V.; Queneau, Y.; Leiva, A.; Ríos, H. E.; Pavez, J.; Silva, C. P.; Carrasco, C.; Neira Carrillo, Andrónico; Roth, A. D.; Tamayo, Laura; Urzúa Acevedo, Marcela (American Chemical Society, 2019)Surfaces were prepared with polyelectrolyte derivatives of poly(styrene-alt-maleic anhydride) (PSMA) functionalized with amino acids of different hydropathy indices, with the aim of evaluating the effect of the chemical ...
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López Urzúa, Naima (Universidad de Chile, 2018)La combustión residencial de biomasa es una fuente de energía común de calefacción y cocina en Chile especialmente en las ciudades del centro y sur. Sin embargo, al mismo tiempo produce importantes cantidades de ...
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Toral Ponce, María; González Navarrete, Javier; Leiva, Angel; Ríos, Hernán E.; Urzúa Acevedo, Marcela (2009)The ability of solid N-alkyl quaternized poly(4-vinylpyridine) with hexyl, octyl and decyl bromide for the retention of chromate and dichromate forms of Cr(VI) in aqueous solutions is studied. The retention of Cr(VI) was ...
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Basha, Kottur Anver; Balakrishnan, Thavikkannu; Urzúa Acevedo, Marcela; Leiva, Angel; Alegria, Luz; Gargallo, Ligia; Radic, Deodato (2009)Phenoxyethyl methacrylate (POEMA) and butyl methacrylate (BMA) were copolymerized by free-radical copolymerization using ,'-azobisisobutyronitrile (AIBN) in 2-butanone solution at 3331K. Copolymers were characterized by ...
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Cabrera, Walton J.; Urzúa Acevedo, Marcela; Ríos Pella Lillo, Hernán Eugenio (Academic Press Inc., 2003)The effect of phenols containing different electron-withdrawing substituents on the potentiometric responses of several liquid PVC membranes containing the complex trioctylmethylammonium-nitrate, TOMA+NO3 -, is analyzed. ...
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Briones Sierra, Diego Hernán (Universidad de Chile, 2008)La contaminación, la pérdida de hábitat, los disturbios, el cambio del uso del suelo están todos implicados en el deterioro ambiental, sin embargo, la relación causa efecto no puede ser demostrada sin datos de monitoreo ...
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Brito Martínez, Cristián Enrique (Universidad de Chile, 2007)En este trabajo se evaluaron los aspectos ambientales que tienen relación al uso y manipulación de sustancias peligrosas, se identificaron dos aspectos significativos los que corresponden ala formación de aerosoles de ...
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Cabrera, Walton J.; Urzúa Acevedo, Marcela; Rios Peña Lillo, Hernán (2005)The influence of decyl alcohol on the potentiometric response of three para-alkylbenzenesulfonate (p-RBS) electrodes is analyzed. The results are clearly dependent on the membrane surface polarity due to the presence of ...
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Atalah, Joaquín; Blamey, Lotsé; Muñoz Ibacache, Sebastián; Gutiérrez, Felipe; Urzúa Acevedo, Marcela; Encinas, María Victoria; Páez, Maritza; Sun, Junsong; Blamey, Jenny M. (Springer, 2020)Violacein is an intensely purple pigment synthesized by various genera of bacteria that has been discovered to have a wide range of interesting biological activities which range from anticarcinogenic to antibacterial. One ...
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Silva, Rubens A.; Urzúa Acevedo, Marcela; Petri, Denise F.S. (2009)The adsorption behavior of polycations at ionic strengths (I) ranging from 0.001 to 0.1 onto silicon wafers was studied by means of ellipsometry, contact angle measurements and atomic force microscopy (AFM). Polycations ...
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Calfumán, Karla; Honores, Jessica; Isaacs, Mauricio; Quezada, Diego; Valdebenito, Javier; Urzúa Acevedo, Marcela (Wiley-VCH Verlag, 2019)Atrazine is a pesticide used to control broadleaf weeds, however its wide distribution and its high persistence in the soil and in surface waters has resulted in a public and environmental health problem. Present results ...
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Ríos, Hernán E.; González Navarrete, Javier; Vargas, Víctor; Urzúa Acevedo, Marcela (Elsevier, 2011)Poly (N,N-dimethyl-N,N-diallyl ammonium) chloride, a highly hydrophilic polyelectrolyte, was hydrophobically modified and the surface properties of the resulting amphipathic polyelectrolytes were determined. The surface ...