Browsing by Author "Blanco, E."

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    Conversion of levulinic acid over Ag substituted LaCoO3 perovskite
    (2021) Seguel, J.; Leal, E.; Zarate, X.; Saavedra-Torres, M.; Schott Verdugo, Eduardo Enrique; Díaz de León, J.N.; Blanco, E.; Escalona, N.; Pecchi, G.; Sepúlveda, C.
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    Electrodes based on zeolites modified with cobalt and/or molybdenum for pesticide degradation : part II—2,4,6-trichlorophenol degradation
    (2020) Castro, J.; Fernández, F.; Olivares, F.; Berríos, C.; Garrido-Ramírez, E.; Blanco, E.; Escalona, Néstor; Aspée, A.; Barrías, P.; Ureta-Zañartu, M. S.
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    Enhancing the Biosorption Capacity of Macrocystis pyrifera: Effects of Acid and Alkali Pretreatments on Recalcitrant Organic Pollutants Removal
    (Elsevier, 2025) Varas, M.; Castro-Rojas, J.; Contreras-Porcia, L.; Ureta-Zanartu, M.S.; Blanco, E.; Escalona, N.; Muñoz, E.; Garrido Ramirezm, E.
    © 2025 by the authors.The effects of acid and alkali pretreatments on the physicochemical and textural properties of Macrocystis pyrifera were evaluated to assess its potential for removing recalcitrant organic pollutants from aquatic systems. Untreated (UB), acid-pretreated (ACPB), and alkali-pretreated (ALPB) seaweed biomass were characterized using SEM, FTIR-ATR, N2 adsorption–desorption, and potentiometric titrations. Adsorption isotherms and kinetic studies, using methylene blue (MB) as a model pollutant, were conducted to evaluate removal performance. All biosorbents exhibited Langmuir behavior, with maximum adsorption capacities of 333 mg g−1 (UB), 189 mg g−1 (ACPB), and 526 mg g−1 (ALPB). FTIR-ATR and SEM analyses revealed that alkali pretreatment increased the abundance of hydroxyl, carboxylate, and sulfonated functional groups on the seaweed cell walls, along with greater porosity and surface roughness, resulting in enhanced MB adsorption. In contrast, acid pretreatment increased the exposure of carboxylic, amine, and amide functional groups, reducing the electrostatic interactions. The adsorption energy values further supported this, while the intra-particle diffusion model indicated a two-step process involving MB diffusion onto the seaweed surface, followed by diffusion into internal pores. These findings highlight the potential application of Macrocystis pyrifera-based biosorbents in the treatment of wastewater containing recalcitrant organic pollutants.
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    Enhancing the Biosorption Capacity of Macrocystis pyrifera: Effects of Acid and Alkali Pretreatments on Recalcitrant Organic Pollutants Removal
    (Multidisciplinary Digital Publishing Institute (MDPI), 2025) Varas, M.; Castro-Rojas, J.; Contreras-Porcia, L.; Ureta-Zanartu, M.S.; Blanco, E.; Escalona, N.; Muñoz, E.; Garrido Ramirezm, E.
    © 2025 by the authors.The effects of acid and alkali pretreatments on the physicochemical and textural properties of Macrocystis pyrifera were evaluated to assess its potential for removing recalcitrant organic pollutants from aquatic systems. Untreated (UB), acid-pretreated (ACPB), and alkali-pretreated (ALPB) seaweed biomass were characterized using SEM, FTIR-ATR, N2 adsorption–desorption, and potentiometric titrations. Adsorption isotherms and kinetic studies, using methylene blue (MB) as a model pollutant, were conducted to evaluate removal performance. All biosorbents exhibited Langmuir behavior, with maximum adsorption capacities of 333 mg g−1 (UB), 189 mg g−1 (ACPB), and 526 mg g−1 (ALPB). FTIR-ATR and SEM analyses revealed that alkali pretreatment increased the abundance of hydroxyl, carboxylate, and sulfonated functional groups on the seaweed cell walls, along with greater porosity and surface roughness, resulting in enhanced MB adsorption. In contrast, acid pretreatment increased the exposure of carboxylic, amine, and amide functional groups, reducing the electrostatic interactions. The adsorption energy values further supported this, while the intra-particle diffusion model indicated a two-step process involving MB diffusion onto the seaweed surface, followed by diffusion into internal pores. These findings highlight the potential application of Macrocystis pyrifera-based biosorbents in the treatment of wastewater containing recalcitrant organic pollutants.
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    Genetic determinants of BMI from early childhood to adolescence : the Santiago Longitudinal Study
    (2019) Justice, A.E.; Chittoor, G.; Blanco, E.; Graff, M.; Wang, Y.; Albala, C.; Santos Martín, José Luis; Angel, B.; Lozoff, B.; Voruganti, V.S.; North, K.E.; Gahagan, S.
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    Intron Retention As An Alternative Splice Variant of the Rat Urocortin 1 Gene
    (2006) Blanco, E.; Andrés Coke, María Estela; Forray Claps, María Inés; Gysling Caselli, Katia
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    Relevant aspects of the conversion of guaiacol as a model compound for bio-oil over supported molybdenum oxycarbide catalysts
    (2020) Blanco, E.; Aguirre Abarca, Diego Alejandro; Díaz de León, J. N.; Escalona, Néstor
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    Study of supported bimetallic MoRe carbides catalysts for guaiacol conversion
    (2020) Blanco, E.; Díaz de León, J. N.; García Fierro, J. L.; Escalona, Néstor
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    Trans-ancestry genome wide association study of childhood body mass index identifies novel loci and age specific effects
    (2025) Downie, C.G.; Shrestha, P.; Okello, S.; Yaser, M.; Lee, H.H.; Wang, Y.; Krishnan, M.; Chen, H.-H.; Justice, A.E.; Chittoor, G.; Josyula, N.S.; Gahagan, S.; Blanco, E.; Burrows, R.; Correa-Burrows, P.; Albala, C.; Santos Martin, José Luis; Angel, B.; Lozoff, B.; Hartwig, F. P.; Horta, B.; Brina, K. R.; Isasi, C.R.; Qi, Q.; Gallo, L. C.; Perreira, K. M.; Thyagarajan, B.; Daviglus, M.; Van Horn, L.; Gonzalez, F.; Bradfield, J.P.; Hakonarson, H.; Grant, S.F.A.; Below, J.E.; Felix, J.; Graff, M.; Divaris, K.; North, K.E.
    Over the past 30 years, obesity prevalence has markedly increased globally, including among children. Although genome-wide association studies (GWASs) have identified over 1,000 genetic loci associated with obesity-related traits in adults, the genetic architecture of childhoodobesity is less well characterized. Moreover, most childhood obesity GWASs havebeenrestrictedto severelyobese children,in relatively small sample sizes, and in primarily European-ancestry populations. To identify genetic loci associated with early-childhood body mass index (BMI), we performed GWAS of BMI Z scores in eight ancestrally diverse cohorts: ZOE 2.0 cohort, the Santiago Longitudinal Study (SLS), the Vanderbilt University BioVU biobank, the Geisinger MyCode Health Initiative biobank, Study of Latino (SOL) Youth, Pelotas (Brazil) Birth Cohort, Cameron County Hispanic Cohort (CCHC), and Viva La Familia cohort. We subsequently performed inverse-variance-weighted fixed-effect meta-analysis of these results with previously published GWAS summary statistics of BMIZscores of children in the Early GrowthGenetics (EGG) Consortium and the Norwegian Mother andChild Cohort (MoBa), constituting a final total of 84,804 individuals. We identified 39 genome-wide significant loci associated with childhood BMI, including three putatively novel loci (EFNA5 and DTWD2, RP11-2N5.1 on chromosome 5, and LSM14A on chromosome 19). We also observed a dynamic nature of genetic loci-BMI associations across the life course, with distinct effects across childhood and adulthood, highlighting possible critical periods for early-childhood interventions. These findings strengthen calls for larger population-based studies of children across age strata and across diverse populations.
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    Water footprints and irrigated agricultural sustainability : the case of Chile
    (2016) Donoso H., Guillermo; Blanco, E.; Franco, G.; Lira, G.