Resultados de búsqueda - ((merce OR were) OR herece)*

  1. 81

    Electrochemical Evaluation of a Stainless Steel as Reinforcement in Sustainable Concrete Exposed to Chlorides por Santiago Hurtado, Griselda

    Publicado 2016
    “…For this research three concrete mixtures were produced, the first concrete was made with 100 % cement CPC 30R, the second mixture was considered sustainable concrete because using 80 % of cement CPC 30R and 20 % of silica fume and the third mixture was elaborated with 80 % of cement CPC 30R and 20 % of fly ash, these mixtures were designed according to the method ACI 211.1, in the specimens were embedded bars of AISI 304 stainless steel and AISI 1018 steel, the specimens were exposed in a solution at 3.5 % of NaCl, simulating a marine environment, for to evaluate the corrosion resistance were used electrochemical techniques of Half-Cell Potential, standard ASTM C-876-09 and the Linear Polarization Resistance, standard ASTM G59, results Ecorr and Icorr after 180 days of exposure show that, the best performance was presented concrete specimens produced with 20 % silica fume and reinforced with AISI 304 stainless steel, with corrosion potential (Ecorr) indicating a 10 % probability of corrosion and Icorr values that indicate a passivity level of corrosion.…”
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    Spatial distribution of the larval indices of Aedes aegypti in Guadalupe, Nuevo León, Mexico, with circular distribution analysis por Mercado Hernández, Roberto, Fernández Salas, Ildefonso, Villarreal Martínez, Homero Fernando

    Publicado 2003
    “…Arguments corresponding to the mean angle of house (260 degrees), recipient (265 degrees), and Breteau (247 degrees) indices were 0.2321, 0.2331, and 0.2225, respectively. In addition, arguments for the mean angle of herbaceous (277 degrees), shrub (318 degrees), and arboreal (333 degrees) vegetation were 0.2589, 0.1984, and 0.2367, respectively, and the 3 were located in the 4th quadrant. …”
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  5. 85

    Natural variability of essential oil and antioxidants in the medicinal plant Turnera diffusa por Urbizu González, Ana Lucía, Castillo Ruiz, Octelina, Martínez Ávila, Guillermo Cristian Guadalupe, Torres Castillo, Jorge Ariel

    Publicado 2017
    “…Polyphenol contents, antioxidant activities using ABTS and ferric reducing antioxidant power (FRAP) methods also were evaluated. Results: A total of 21 compounds were identified in the essential oils; nevertheless, only Eucalyptol, 1,4-Methanocycloocta[d]pyridazine, 1,4,4a,5,6,9,10,10a-octahydro-11,11- dimethyl-, (1`a,4`a,4a`a,10a`a) y Ethanone, 1-(1,3-dimethyl-3-cyclohexen-1-yl) were detected in the three sites. …”
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  12. 92

    Efecto de la microestructura y la concentración del ácido en la corrosión de aleaciones binarias Pb-Sn por Borrego Navejas, Rocío

    Publicado 2015
    “…Once microstructures were evaluated, five samples of each thermal treatment were submitted to measure mechanical properties and another sample was used to determine microhardness. …”
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  13. 93

    Efecto de la microestructura y la concentración del ácido en la corrosión de aleaciones binarias Pb-Sn por Borrego Navejas, Rocío

    Publicado 2015
    “…Once microstructures were evaluated, five samples of each thermal treatment were submitted to measure mechanical properties and another sample was used to determine microhardness. …”
    Enlace del recurso
    Tesis
  14. 94

    Smoking, depression, and suicide risk in the nursing staff of a Third-Level Hospital por Sánchez Núñez, Raquel Alejandra, Ramírez, C., Gómez Meza, Marco Vinicio

    Publicado 2014
    “…Another hetero-applied scale of nicotine dependency was also used, and the subjects’ socio-demographic records were reviewed. Results: A total of 527,232 nurses were studied. …”
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    Association of seventeen definitions of remission with functional status in a large clinical practice cohort of patients with rheumatoid arthritis por Carvalho, Danilo O., O. Ferreira, Ricardo J., Landewé, Robert, Vega Morales, David, Salomon Escoto, Karen, Veale, Douglas J., Chopra, Arvind, Da Silva, José A. P, Machado, Pedro M.

    Publicado 2020
    “…Methods: Longitudinal data from the METEOR database were used. Seventeen definitions of remission were tested: ACR/EULAR Boolean-based; Simplified/Clinical Disease Activity Index (SDAI/CDAI); and fourteen Disease Activity Score (DAS)-based definitions. …”
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