Now showing items 969-988 of 7543

    • Del Valle, Luciano; Escala Astorquiza, Andrés (The American Astronomical Society, 2014)
      We study the interaction of an unequal-mass binary with an isothermal circumbinary disk, motivated by the theoretical and observational evidence that after a major merger of gas-rich galaxies, a massive gaseous disk with a ...
    • Poblete Olivares, Patricio; Munro, J. Ian; Papadakis, Thomas (ELSEVIER, 2006-03-07)
      To any sequence of real numbers < a(n)>(n >= 0), we can associate another sequence < a(s)>(s >= 0), which Knuth calls its binomial transform. This transform is defined through the rule as = Bsan = Sigma(n) (-1)(n) ...
    • Biguetti, Claudia; Cavalla, Franco; Tim, Carla; Pinto Saraiva, Patrícia; Orcini, Wilson; De Andrade Holgado, Leandro; Muniz Rennó, Ana; Akemi Matsumoto, Mariza (Springer Verlag, 2019)
      Objective The aim of the study was to analyze bone matrix (BMX) organization after bone grafting and repair using a new bioactive glass-ceramic (Biosilicate®) associated or not with particulate autogenous bone graft. Material ...
    • Figureau, A.; Soto, M. A.; Tohá, J. (Churchill Livingstone, 2000)
      A new cryptology that uses biomolecules as carriers of hidden information is described here. The huge dimension of biopolymers permits the insertion there of private messages and the rapidity and specificity of biomolecular ...
    • San Martín, Francisca; Valles, Ignacio; Kracht Gajardo, Willy Andrés; Vargas Valero, José Tomás; Aguilar, Claudio (MDPI, 2021)
      Acidithiobacillus ferrooxidans has been shown to be a good depressant of pyrite in freshwater and seawater flotation. However, the effect of these bacteria over copper-activated pyrite has not been studied. At the industrial ...
    • San Martín, F.; Kracht Gajardo, Willy; Vargas T., Ling (Elsevier, 2018)
      In Cu-Mo deposits it is usual to find considerable amounts of pyrite (FeS2). When processing this kind of ore by flotation, pyrite is rejected using lime to increase the pH to alkaline conditions (pH similar to 10-12). In ...
    • Casas de Prada, Jesús; Martínez, J.; Moreno, L.; Vargas Valero, Tomás (1998-08)
      A two-dimensional (2-D) model for a heap or dump bioleaching of a copper ore containing mainly chalcocite and pyrite has been developed. The rate of the mineral sulfide dissolution was related to the rate of oxidation ...
    • Guerrero-Castillo, Pedro; Reyes, Sarita; Robles, Juana; Simirgiotis, Mario J.; Sepulveda, Beatriz; Fernandez-Burgos, Ronald; Areche, Carlos (Elsevier Ltd, 2019)
      Pouteria lucuma fruit is widely used to prepare cakes, ice creams and juice or also commercialized as pulp and flour. As result of this business thousands of tons of seeds are generated as an agricultural waste. This study ...
    • Gutiérrez, Mario F.; Alegría-Acevedo, Luisa F.; Méndez-Bauer, Luján; Bermudez, Jorge; Dávila-Sánchez, Andrés; Buvinic, Sonja; Hernández-Moya, Nadia; Reis, Alessandra; Loguercio, Alessandro D.; Farago, Paulo V.; Martin, Javier; Fernández Godoy, Eduardo (Elsevier Ltd, 2019)
      Objectives: To evaluate the effect of addition of zinc oxide and copper nanoparticles (ZnO/CuNp) into universal adhesives, on antimicrobial activity (AMA), cytotoxicity (CTX), water sorption (WS) and solubility (SO), ...
    • Muthuchamy, Maruthupandy; Muneeswaran, Thillaichidambaram; Rajivgandhi, Govindan; Christophe Quero, Franck; Muthusamy, Anand; Ji-Ming, Song (Elsevier, 2020)
      In the present study, we report CuO and ZnO nanoparticles (NPs) synthesized through biological route using Camellia japonica plant leaf extract and their efficiency detection of cysteine and dihydronicotinamide adenine ...
    • Rajivgandhi, Govindan; Maruthupandy, Muthuchamy; Muneeswaran, Thillaichidambaram; Ramachandran, Govindan; Manoharan, Natesan; Quero, Franck; Anand, Muthusamy; Song, Ji Ming (Academic Press, 2019)
      © 2018 Elsevier Ltd Copper oxide nanoparticles (CuO NPs) were synthesized biologically using leaf extract of Camilla japonica. The typical UV–visible spectral peak of CuO NPs was observed at a wavelength of ∼290 nm, which ...
    • Herrera C., Daniel; Pinto Neira, J.; Fuentealba, D.; Sepúlveda, C.; Rosenkranz, Andreas; González, M.; Escalona, N. (Elsevier, 2020)
      Carbon nanotubes-supported Ni catalysts were investigated for the hydrogenation of furfural as a biomass-derived furanic model compound at the liquid-liquid interface of Pickering emulsions in a batch reactor at 200 degrees ...
    • Slanzi, Gino; Pizarro, Gaspar; Velásquez, Juan D. (Elsevier, 2017)
      Throughout the years having knowledge of Web users' interests, navigational actions and preferences has gained importance due to the objectives of organizations and companies. Traditionally this field has been studied from ...
    • Arriaza Echanes, C.; Campo Giraldo, J. L.; Quezada, C. P.; Espinoza Gonzáles, Rodrigo Andrés; Rivas Álvarez, P.; Pacheco, M.; Bravo, D.; Pérez Donoso, J. M. (Elsevier, 2021)
      CuInS2 (CIS) nanoparticles have unique chemical, toxicological and optoelectronic properties that favor their technological applications. In the present work we report a novel one step biomimetic method for the aqueous ...
    • Karthikeyan, Chandrasekaran; Varaprasad, Kokkarachedu; Akbari-Fakhrabadi, Ali; Hameed, Abdulrahman Syedahamed Haja; Sadiku, Rotimi (Elsevier, 2020)
      As a result of the existence of drug-resistant bacteria and the attendant deficiency of innovative antibiotics, the therapeutic and the clinical sectors are, continually, in search of appropriate multifunctional nanomedicines. ...
    • Sepúlveda, P.; Le Roux, Jacobus; Lara, L. E.; Orozco, G.; Astudillo, V. (EGU Journals, 2015)
      Hotspot oceanic islands typically experience subsidence due to several processes related to migration of the oceanic plate away from the mantle plume and surface flexural loading. However, many other processes can interrupt ...
    • Rajivgandhi, Govindan; Maruthupandy, Muthuchamy; Muneeswaran, Thillaichidambaram; Anand, Muthusamy; Quero, Franck; Manoharan, Natesan; Li, Wen Jun (Academic Press Inc., 2019)
      The ability of a natural stabilizing and reducing agent on the synthesis of silver nanoparticles (Ag NPs)was explored using a rapid and single-pot biological reduction method using Nocardiopsis sp. GRG1 (KT235640)biomass. ...
    • Díaz de Vivar, Enriqueta; Baggio, Sergio; Garland, María Teresa; Baggio, Ricardo (BLACKWELL PUBLISHING, 2005-06)
      The title ionic zinc - acetate complex, [Zn(C2H3O2)(C12H12N2) (2)](2)(S3O6) center dot 5H(2)O, contains a ZnN4O2 nucleus provided by the three bidentate ligands acting in a chelating mode. The trithionate unit, in turn, ...
    • Abriola, Sergio; Barceló Baeza, Pablo; Figueira, Diego; Figueira, Santiago (AI Access Foundation, 2018)
      Bisimulation provides structural conditions to characterize indistinguishability from an external observer between nodes on labeled graphs. It is a fundamental notion used in many areas, such as verification, graph-structured ...
    • Mujica Fernández, Nicolás; Lathrop, Daniel P. (ELSEVIER SCIENCE, 2005-10-01)
      We report on experimental observations of a gravity-wave instability forced by a highly turbulent free-surface Taylor-Couette flow. We observe a subcritical bifurcation from a highly turbulent base state, the mean flow of ...