Browsing by Author "201-0489765"
Now showing items 1-20 of 24
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Herrera, Bárbara A.; Bruna Larenas, Tamara; Sierpe Bustamante, Rodrigo; Lang Pontony, Erika; Urzúa Acevedo, Marcela; Flores Carrasco, Marcos; Jara Vergara, Paul; Yutronic Sáez, Nicolás (Elsevier, 2020)In this work, we present a solid silicon substrate functionalized with modified beta-cyclodextrin monolayers as an optimal surface for organic contaminant uptake. The inclusion and capture of three potential pollutants, ...
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Urzúa Acevedo, Marcela; Briones, X. G.; Carrasco, L. P.; Encinas, M. V.; Petri, D. F. S. (ELSEVIER SCI LTD, 2010-06-02)The adsorption behavior of several amphiphilic polyelectrolytes of poly(maleic anhydride-alt-styrene) functionalized with naphthyl and phenyl groups, onto amino-terminated silicon wafer has been studied by means of null- ...
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Urzúa Acevedo, Marcela; Ríos, Hernán E. (2003)The Du Noüy method has been employed to study the interfacial properties of poly(4-vinylpyridine) N-n-alkyl quaternized with hexyl, octyl and decyl bromide, at the chloroform/water interface. The interfacial tension is ...
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Ríos, Hernán E.; González Navarrete, Javier; Peña, María L.; Sagredo, Claudio D.; Urzúa Acevedo, Marcela (ELSEVIER SCIENCE BV, 2010-05-04)The interfacial properties of poly-2-(dimethylamino) ethyl methacrylate-N-alkyl quaternized with octyl, decyl, dodecyl and tetradecyl bromide are studied from the chloroform to the water/chloroform interface. In order ...
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Urzúa Acevedo, Marcela; Sandoval, Claudia; González Nilo, Fernando; Leiva, Angel; Gargallo, Ligia; Radic, Deodato (JOHN WILEY, 2006-11-05)The phase behavior of blends containing N-alkylitaconamic acid-co-styrene copolymers (NAIA-co-S) with poly(N-vinyl-2-pyrrolidone) (PVY) of two different weight average molecular weights (M-w($) over bar), poly(2-vinylpyridine) ...
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Urzúa Acevedo, Marcela; Sandoval, Claudia; González Nilo, Fernando; Leiva, Angel; Gargallo, Ligia; Radić, Deodato (2006)The phase behavior of blends containing N-alkylitaconamic acid-co-styrene copolymers (NAIA-co-S) with poly(N-vinyl-2-pyrrolidone) (PVP) of two different weight average molecular weights (M̄w̄), poly(2-vinylpyridine) (P2VPy) ...
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Leiva, Angel; Fuentes, Irma; Bossel, Esteban; Urzúa Acevedo, Marcela; Méndez, Maximiliano; Pino, Maximiliano; Radïc, Deodato; Márquez, Valeria; González Nilo, Fernando (John Wiley and Sons Inc., 2014)© 2014 Wiley Periodicals, Inc.In this article, innovative applications of amphiphilic triblock and pentablock copolymers in the synthesis of gold nanoparticles are reported. The synthesis of gold nanoparticles is performed ...
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Basha, K. Anver; Balakrishnan, Thavikkannu; Urzúa Acevedo, Marcela; Leiva, Angel; Alegría, Luz; Gargallo, Ligia; Radic, Deodato (2008)The free radical copolymerization of phenoxyethyl methacrylate (POEMA) and glycidyl methacrylate (GMA) was carried out using ,'-azobisisobutyronitrile (AIBN) in 2-butanone solution at 3331K. The copolymers were characterized ...
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Acevedo Pizarro, Betzabé (Universidad de Chile, 2015)En este trabajo de tesis se realizó un estudio sobre la formación de agregados por copolímeros en bloque lineales e hiper ramificados en disolución acuosa. Estos agregados proporcionan un medio no polar donde es posible ...
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Leiva, Angel; Saldías, César; Quezada, Caterina; Toro Labbé, Alejandro; Espinoza-Beltrán, Francisco J.; Urzúa Acevedo, Marcela; Gargallo, Ligia; Radic, Deodato (2009)Block copolymers have been extensively used in the synthesis of many types of nanoparticles, where generally are considered as stabilizer and protective agent. In this work a double function of the biodegradable triblock ...
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Muñoz, Lisa; Pineda, Fabiola; Martínez, Carola; Sancy, Mamié; Urzúa Acevedo, Marcela; Flores Carrasco, Marcos; Encinas, María V.; Páez, Maritza A. (Elsevier, 2019)To better understand the effect of surface treatments on the efficiency of protective coatings of aluminum alloys, this study assessed different surface treatments for the aluminum alloy AA2024, including mechanical ...
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Villalobos, Valeria; Leiva, Ángel; Ríos, Hernán E.; Pavez, Jorge; Silva, Carlos P.; Ahmar, Mohammed; Queneau, Yves; Blamey, J. M.; Chávez, Francisco P.; Urzúa Acevedo, Marcela (American Chemical Society, 2018)© 2018 American Chemical Society. Inhibiting pathogenic bacterial adherence on surfaces is an ongoing challenge to prevent the development of biofilms. Multilayer polyelectrolyte films are feasible antibacterial materials. ...
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Urzúa Acevedo, Marcela; Mendizábal Emaldía, Fernando; Cabrera, Walton J.; Ríos, Hernán E. (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2005-06-01)The interfacial properties ofpoly(maleic acid-alt-1-alkene) disodium salts at hydrocarbon/water interfaces are determined. In all the studied systems, the interfacial tension decreases markedly with the polyelectrolyte ...
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Leiva, Angel; Muñoz, Natalia; Urzúa Acevedo, Marcela; Gargallo, Ligia; Radic, Deodato (Sociedade Brasileira de Química, 2010)Foram sintetizados uma série de copolímeros enxertados biodegradáveis pelo enxerto da e-captolactona sobre dextrana de diferentes pesos moleculares. Os polímeros obtidos foram caracterizados por infravermelho com transformada ...
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Rojas Blanco, L.; Urzúa Acevedo, Marcela; Ramírez Bon, R.; Espinoza Beltrán, F. J. (Elsevier, 2012)In this work, TiO2–N powders were synthesized by high-energy ball milling, using commercial titanium dioxide (TiO2) in the anatase phase and urea to introduce nitrogen into TiO2 in order to enhance their photocatalytic ...
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Poly(ethylene oxide)s hydrophobically modified. Adsorption and spreading at the air-water interface Leiva, Angel; Urzúa Acevedo, Marcela; Gargallo, Ligia; Radic, Deodato (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2006-07-01)A comparative study of spread and adsorbed monolayer of poly(ethylene oxide)s of different molecular weight hydrophobically modified with alkyl isocyanates of different length chain is reported. The modification of the ...
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Méndez-López, Maximiliano; Saldías, Cesar; Urzúa Acevedo, Marcela; Villalobos, Valeria; Schmidt, Mathias; Radić, Deodato; Leiva, Angel (American Scientific Publishers, 2017)Copyright © 2017 American Scientific Publishers All rights reserved. In this work, we report an interesting method for simultaneous obtaining and immobilization of gold nanoparticles onto polymer thin films. Polymer-based ...
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Cabrera, Walton J.; Kaempfe, Marianne A.; Urzúa Acevedo, Marcela; Ríos, Hernán E. (ACADEMIC PRESS INC ELSEVIER SCIENCE, 2006-03-01)The effect of 1-decanol on the potentiometric response of three ion-selective electrodes to large cationic species is analyzed. The electrodes were constructed with plasticized PVC membranes. The results suggest that ...
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Silva, Rubens A.; Urzúa Acevedo, Marcela; Petri, Denise F. S.; Dubin, Paul L. (AMER CHEMICAL SOC, 2010-07-04)Ellipsometry was used to investigate the influence of ionic strength (I) and pH on the adsorption of bovine serum albumin (BSA) or β-lactoglobulin (BLG) onto preabsorbed layers of two polycations: poly(diallyldimethylam ...
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Urzúa Acevedo, Marcela; Leiva, Angel; Espinoza-Beltrán, Francisco J.; Briones, Ximena; Saldías, Cesar; Pino, Maximiliano (2012)Nanocomposed films constituted by gold nanoparticles immobilized onto polyelectrolytes were obtained and studied. To obtain the films, amino terminated silicon wafer surfaces were put in contact with aqueous solution of ...