Article
Polymeric hydrogels obtained using a redox initiator: Application in Cu(II) ions removal from aqueous solutions
Fecha
2014Autor
Herrera-Gomez, A.
Bravo-Sanchez, M.
Ceballos-Sanchez, O.
Vazquez-Lepe, M.O.
Institución
Resumen
The active approach for background modeling is described in this report. Under this technique, the background is assessed during the optimization of the peak parameters. In contrast, under the traditional (static ) approach, the background is defined prior to peak fitting. The active has many advantages over the static, such as that the peak areas are often underestimated under the static approach. The active technique allows for treating the background as a combination of various background types. There are many reports in the literature where some of the features of the active approach are employed. Also described in this report is the Shirley-Vegh-Salvi-Castle (SVSC) background, which is a variant of the Shirley-Proctor-Sherwood method that does not require iterations. The advantages of the SVSC over the Shirley-Proctor-Sherwood background are fully described. Copyright " 2014 John Wiley & Sons, Ltd.",,,,,,"10.1002/sia.5453",,,"http://hdl.handle.net/20.500.12104/43783","http://www.scopus.com/inward/record.url?eid=2-s2.0-84908164965&partnerID=40&md5=3b22c892c8ccf0d1f6884c8ee74df4d9",,,,,,"10-nov",,"Surface and Interface Analysis",,"897 905",,"46",,"Scopus WOS",,,,,,"Active approach; Static approach; Svsc background",,,,,,"Practical methods for background subtraction in photoemission spectra",,"Article"
"45478","123456789/35008",,"Reynoso-Orozco, R., CINVESTAV-IPN, Mexico, Centro Universitario de Ciencias Biológicas y Agropecuarias (CUCBA), UDG, Mexico, Departamento de Biología Celular y Molecular, CUCBA, Universidad de Guadalajara, Km 15.5 Carr. a Nogales, AP 3982, Zapopan, Jalisco. C.P. 45110, Mexico; Santerre, A., Centro Universitario de Ciencias Biológicas y Agropecuarias (CUCBA), UDG, Mexico, University Paris XI, France; Delgado-Saucedo, J.I., U.D.G., Mexico; Solís, J.C., Centro Universitario de Ciencias Biológicas y Agropecuarias (CUCBA), UDG, Mexico, U.D.G., Mexico; Velázquez-Magaña, S., Centro Universitario de Ciencias Biológicas y Agropecuarias (CUCBA), UDG, Mexico, Universidad Autónoma de Baja California, Mexico; Puebla-Pérez, A.M., U.D.G., Mexico",,"Reynoso-Orozco, R. Santerre, A. Delgado-Saucedo, J.I. Solis, J.C. Velazquez-Magana, S. Puebla-Perez, A.M.",,"2008",,"In normal and tumoral cells, the polyamines (PAs) putrescine (Pu), spermidine (Spd) and spermine (Spm) are required in multiple fundamental cell cycle functions. High levels of PAs have been reported in many types of cancer, which is why they were proposed as biomarkers of cancer growth. In the present work, their utility as biomarkers of the evolution of the murine L5178Y lymphoma is reported in different body fluids, cells and tissues. Findings were also applied to the follow-up of the previously reported anti-tumor effect of Bursera fagaroides. Cation exchange chromatography was used to determine the PAs levels in urine, peritoneal cells, circulating lymphocytes, spleenocytes, mesothelium and liver of BALB/c mice at days 10, 17 and 24 of tumoral evolution. PAs levels were also measured in urine from mice treated, intraperitoneally or orally, with the hydroalcoholic extract of the bark of B. fagaroides. Spd and Spm urinary levels were not detectable, while Pu increase in urine is the best biomarker to detect lymphoma growth. Furthermore, Pu urinary levels decreased significantly in mice treated intraperitoneally with B. fagaroides. In this model, variations of the Pu urinary level is an effective biomarker of neoplastic growth as it allows to follow the evolution of L5178Y lymphoma, providing an in vivo assay for the antitumoral effect of B. fagaroides and other drugs.",,,,,,,,,"http://hdl.handle.net/20.500.12104/43699","http://www.scopus.com/inward/record.url?eid=2-s2.0-46749150432&partnerID=40&md5=8ca2acab6477be9a6e0457dd051651c3",,,,,,"5",,"Interciencia",,"384 388",,"33",,"Scopus WOS",,,,,,,,,,,,"Polyamines as biomarkers of the antitumoral activity of Bursera fagaroides",,"Article"
"45519","123456789/35008",,"Galindo-Velasco, E., Facultad de Medicina Veterinaria y Zootecnia, Universidad de Colima, Km 4, Carretera Colima-Manzanillo, 28100, Tecomún, Colima, Mexico; Cruz-Vázquez, C., Instituto Tecnológico, Km 18, Carretera Aguascalientes-San Luis Postosí, Municipio El Llano, 20330, Aguascalientes, Mexico; Lezama-Gutiérrez, R., Facultad de Medicina Veterinaria y Zootecnia, Universidad de Colima, Km 4, Carretera Colima-Manzanillo, 28100, Tecomún, Colima, Mexico; Reyes-Velázquez, W., Centro Universitario de Ciencias Biológicas y Agropecuarias, Universidad de Guadalajara, Km 15.5, Carretera Guadalajara-Nogales, 44100, Zapopan, Jalisco, Mexico; Aguilar-Espinoza, S., Facultad de Ciencias Biológicas Agropecuarias, Universidad de Colima, Km 40, Carretera Colima- Manzanillo, 28100, Tecomún, Colima, Mexico; Pescador-Rubio, A., Facultad de Ciencias Biológicas Agropecuarias, Universidad de Colima, Km 40, Carretera Colima- Manzanillo, 28100, Tecomún, Colima, Mexico",,"Galindo-Velasco, E. Cruz-Vazquez, C. Lezama-Gutierrez, R. Reyes-Velazquez, W. Aguilar-Espinoza, S. Pescador-Rubio, A.",,"2008",,"The objective of the work was to study H. irritans population fluctuation in a cattle herd in Tecoman, Colima, Mexico. The cattle herd was visited weekly from March 2003 to May 2004; on each occasion, ten animals were randomly selected to estimate infestation by direct visualization method. Temperature and relative humidity (RH) were recorded daily. Population fluctuation was described and periods and population peaks were identified. Pearson's correlation analysis was calculated (P < 0.05) between temperature and RH, with fly average number per animal for each population period. H. irritans infestation had fluctuations, but with presence of flies all the year; the highest infestation was observed in summer, where two population peaks were present, with 236 and 120 flies per animal, respectively; the activity in autumn and winter also showed fluctuations and the population had an increment in spring, where a population peak could be observed, as well as at the beginning of the study (156 flies/animal) and at the end (323 flies/animal). In the first population period, a significant correlation coefficient (0.93) was found with temperature, similar situation was observed in the fourth period (-0.57); no significant coefficients were found in other population periods for the climatic factors in study.",,,,,,,,,"http://hdl.handle.net/20.500.12104/43740","http://www.scopus.com/inward/record.url?eid=2-s2.0-70350433409&partnerID=40&md5=fd2a25c5d5097b6751f6bb133586b0f2",,,,,,"2",,"Veterinaria Mexico",,"181 186",,"39",,"Scopus WOS",,,,,,"Cattle; Climatic factors; Haematobia irritans; Mexico; Population fluctuation",,,,,,"Population fluctuation of Haematobia irritans (Diptera: Muscidae) in a cattle herd in Tecoman, Colima, Mexico [Fluctuación poblacional de Haematobia irritans (Diptera: Muscidae) en un hato bovino en Tecomún, Colima, México]",,"Article"
"45539","123456789/35008",,,"Sánchez Navarro, Enrique E.",,"1999",,,,,,,,,,"0188-252X",,"http://hdl.handle.net/20.500.12104/43760",,"Español",,,,"27",,"Comunicación y sociedad",,"43-88",,,,"CLASE",,,,,,,,"Medios de comunicación masiva",,"Flujos globales, nacionales y regionales de programación televisiva. El caso de México",,,,"journalArticle",
"45487","123456789/35008",,"Morán-Quiroz, J.L., Departamento de Química, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara México, Blvd. Marcelino García Barragan 1451 Guadalajara, Jalisco, Mexico; Orozco-Guareño, E., Departamento de Química, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara México, Blvd. Marcelino García Barragan 1451 Guadalajara, Jalisco, Mexico; Manríquez, R., Departamento de Madera, Celulosa y Papel, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara México, Km 15.5 Carretera Guadalajara-Nogales Guadalajara, Jalisco 45020, Mexico; Carbajal-Arizaga, G.G., Departamento de Química, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara México, Blvd. Marcelino García Barragan 1451 Guadalajara, Jalisco, Mexico; De La Cruz, W., Centro de Nanociencias y Nanotecnología, Universidad Nacional Autónoma de México México, Km 107 Carretera Tijuana-Ensenada Ensenada, Baja-California 22830, Mexico; Gomez-Salazar, S., Departamento de Ingeniería Química, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara México, Blvd. Marcelino García Barragan 1451. Guadalajara, Jalisco, Mexico",,"Moran-Quiroz, J.L. Orozco-Guareno, E. Manriquez, R. Carbajal-Arizaga, G.G. De La Cruz, W. Gomez-Salazar, S.",,"2014",,"Poly(acrylic acid-co-acrylamide) hydrogels were prepared via free-radical solution polymerization, crosslinked with ethylene-glycol-dimethacrylate, potassium persulfate/ammonium bisulfite as the initiator, and applied in the removal of Cu(II) ions from aqueous solutions. Molar ratios of acrylamide/acrylic acid moieties and the amount of crosslinking agent were varied to determine the swelling capacities of hydrogels and maximum metal uptake. Polymerization kinetics was investigated by 1H-NMR. Hydrogel physicochemical properties were characterized by nitrogen sorption measurements, elemental analysis, FTIR, and X-ray photoelectron spectroscopy (XPS). Swelling results indicated that hydrogels were swollen up to 27,500%. Hydrogels showed equilibrium Cu(II) adsorption capacities of 211.7 mg g-1 and fast kinetics (?20 min). Langmuir isotherm fitted adsorption equilibrium data. FTIR and XPS results helped in elucidating the presence of monodentate copper complex on the surface of hydrogels. A simple synthesis route of hydrogels using the redox initiator suggests the potential application in the removal of toxic metals from aqueous streams. " 2013 Wiley Periodicals, Inc.