Search Results - (piensa OR (composition OR (compcppcppcppcppcppcccppeso OR compcppcppcppcppcppcccppeso)))

Search alternatives:

  1. 381

    Petrology and geochemistry of meta-ultramafic rocks in the Paleozoic Granjeno Schist, northeastern Mexico: Remnants of Pangaea ocean floor by Torres Sánchez, Sonia Alejandra, Augustsson, Carita, Jenchen, Uwe, Barboza Gudiño, José Rafael, Alemán Gallardo, Eduardo Alejandro, Ramírez Fernández, Juan Alonso, Torres Sánchez, Darío, Abratis, Michael

    Published 2017
    “…We suggest different tectonic settings for metamorphism of its serpentinite and talc-bearing rocks based on petrographic and geochemical compositions. According to the REE ratios (LaN/YbN = 0.51–20.0 and LaN/SmN = 0.72–9.1) and the enrichment in the highly incompatible elements Cs (0.1 ppm), U (2.8 ppm), and Zr (60 ppm) as well as depletion in Ba (1 – 15 ppm), Sr (1–184ppm),Pb(0.1–14ppm),andCe(0.1–1.9ppm)the rocks have mid-ocean ridge and subduction zones characteristics.TheserpentinitecontainsAl-chromite,ferrian chromiteandmagnetite.TheAl-chromiteischaracterized byCr#of0.48to0.55suggestingaMORBorigin,andCr#of 0.93 to 1.00 for the ferrian chromite indicates a prograde metamorphism.Weproposeatleasttwoserpentinization stagesoflithosphericmantlefortheultramaficrockofthe GranjenoSchist,(1)afirstinanocean-floorenvironment atsub-greenschisttogreenschistfaciesconditionsand(2) later a serpentinization phase related to the progressive replacement of spinel by ferrian chromite and magnetite atgreenschisttolowamphibolitefaciesconditionsduring regional metamorphism. …”
    Get full text
    Article
  2. 382

    Corrosion Behavior of Galvanized Steel Embedded in Concrete Exposed to Soil Type MH Contaminated With Chlorides by Baltazar Zamora, Miguel Ángel, Mendoza Rangel, José Manuel, Croche, René, Gaona Tiburcio, Citlalli, López, Luis, Olguín, Francisco, Almeraya Calderón, Facundo

    Published 2019
    “…In such concrete specimens a carbon steel bar AISI 1018 and Galvanized Steel was embedded as reinforcement, the mixed concrete was of ratio water/cement (w/c) = 0.45 (compressive strength, f'c = 350 kg/cm2), according to ACI 211.1, using cements Portland Cement Composite [CPC 30R (Type I) and CPC 30R RS (Type V)]. …”
    Get full text
    Article
  3. 383

    Satisfaction of an employee in a sports entity: design and validation of a measurement scale by Reyes Robles, Marina, Medina Rodríguez, Rosa Elena, Ramírez Siqueiros, María Grethel, López Walle, Jeanette M., Ceballos Gurrola, Oswaldo

    Published 2018
    “…Satisfactory values were obtained, resulting in Kaiser-Meyer-Olkin values of .91, and the Bartlett test was statistically significant with a value (χ² = 3296.01, gl = 378; p <. 001), six factors were extracted with eigen values greater than 1 and that together explain 69.08% of the total variance. the indices of the model in the confirmatory factor analysis were satisfactory: χ2 / df = 1.29, NNFI = .99, CFI = .99, and RMSEA = .03., The results of internal consistency using Cronbach's alpha index with values in this case greater than .70, composite reliability (CR) with values between .88 and .94, and the average variance index extracted (AVE), meanwhile, alsoshowed adequate values, in a range between .60 and .83. …”
    Get full text
    Article
  4. 384

    Aluminosilicates as a Double-Edged Sword: Adsorption of Aflatoxin B1 and Sequestration of Essential Trace Minerals in an In Vitro Gastrointestinal Poultry Model by Hernández Martínez, Sara Paola, Delgado Cedeño, Armando, Ramos Zayas, Yareellys, Franco Molina, Moisés Armides, Méndez Zamora, Gerardo, Marroquín Cardona, Alicia Guadalupe, Kawas Garza, Jorge R.

    Published 2023
    “…X-ray diffraction analysis showed that C-1 is a montmorillonite, C-2 is a beidellite, C-3 is a beidellite-Ca-montmorillonite, and C-4 is a clinoptilolite. The elemental compositions of the clays showed alumina, silica, iron, calcium, and sodium contents. …”
    Get full text
    Article
  5. 385

    Relocation and seismotectonic interpretation of the seismic swarm of August – December of 2012 in the Linares area, northeastern Mexico by Gómez Arredondo, Carmen Maricela, Montalvo Arrieta, Juan Carlos, Iglesias Mendoza, Arturo, Espindola Castro, Victor H.

    Published 2016
    “…The fault plane solutions were generated for individual earthquakes and through the use of the composite mechanism technique. The focal mechanism solutions show pure reverse faulting; the SW dipping NNW – SSE trending nodal plane is the inferred fault plane (strike ~150°, dip ~50° and rake ~67°), which reveals that maximum horizontal stress (SHmax > Shmin > Sv) predominates in the area. …”
    Get full text
    Article
  6. 386
  7. 387
  8. 388
  9. 389

    Caracterización de las sucesiones areno - conglomeráticas del eoceno en la región de las Choapas, Veracruz. by Coronado González, Jesús Margil

    Published 2019
    “…With the isotope geochemistry of Sm/Nd, the isotopic ratios, model ages and Nd epsilon were obtained, in order to be correlated with data of possible source areas. Rocks with compositions similar to those identified in this work have been described in the Chiapas Massif and the Guichicovi Complex, in the Maya Block; and in complexes exhumed by the Polochic-Motagua Fault System, in Chortis Block.…”
    Get full text
    Tesis
  10. 390

    Caracterización de las sucesiones areno - conglomeráticas del eoceno en la región de las Choapas, Veracruz. by Coronado González, Jesús Margil

    Published 2019
    “…With the isotope geochemistry of Sm/Nd, the isotopic ratios, model ages and Nd epsilon were obtained, in order to be correlated with data of possible source areas. Rocks with compositions similar to those identified in this work have been described in the Chiapas Massif and the Guichicovi Complex, in the Maya Block; and in complexes exhumed by the Polochic-Motagua Fault System, in Chortis Block.…”
    Get full text
    Tesis
  11. 391
  12. 392
  13. 393
  14. 394

    Artificial neural network modeling of phenol adsorption onto barley husks activated carbon in an airlift reactor by Loredo Cancino, Margarita

    Published 2013
    “…Purpose and method of the study: The production of activated carbon from barley husks (BH) by chemical activation with zinc chloride was optimized by using a 23 factorial design with replicates at the central point, followed by a central composite design with two responses (the yield and iodine number) and three factors (the activation temperature, activation time, and impregnation ratio). …”
    Get full text
    Tesis
  15. 395

    Artificial neural network modeling of phenol adsorption onto barley husks activated carbon in an airlift reactor by Loredo Cancino, Margarita

    Published 2013
    “…Purpose and method of the study: The production of activated carbon from barley husks (BH) by chemical activation with zinc chloride was optimized by using a 23 factorial design with replicates at the central point, followed by a central composite design with two responses (the yield and iodine number) and three factors (the activation temperature, activation time, and impregnation ratio). …”
    Get full text
    Tesis
  16. 396

    Artificial neural network modeling of phenol adsorption onto barley husks activated carbon in an airlift reactor by Margarita Loredo-Cancino

    Published 2013
    “…Purpose and method of the study: The production of activated carbon from barley husks (BH) by chemical activation with zinc chloride was optimized by using a 23 factorial design with replicates at the central point, followed by a central composite design with two responses (the yield and iodine number) and three factors (the activation temperature, activation time, and impregnation ratio). …”
    Get full text
    info:eu-repo/semantics/doctoralThesis
  17. 397

    La satisfacción de clientes/deportistas y trabajadores en entidades deportivas como determinante de los servicios deportivos. by Reyes Robles, Marina

    Published 2018
    “…Results: satisfactory indices were obtained within the exploratory and confirmatory factor analyzes, the values resulting from the reliability: Cronbach’s alpha, composite reliability and average variance extracted were acceptable for most if the factors except for the facility factor of the client/athlete survey that did not meet the recommended value, the correlation indexes, it is observed that all the factor of the poll of client/athlete survey as for the workers correlate positive and significantly among all the factors. …”
    Get full text
    Tesis
  18. 398

    Recubrimientos bimodales de WC-co-VC nanoestructurado aplicados por rociado térmico como alternativa del cromo hexavalente para trenes de aterrizaje. by Valladares Hernández, Julio César

    Published 2018
    “…To evaluate the coatings a central composite experimental design was used to study the effect vanadium carbide content and nanostructured particles concentration on the hardness, coefficient of friction and wear rate of WC-17Co-VC bimodal coatings. …”
    Get full text
    Tesis
  19. 399

    La satisfacción de clientes/deportistas y trabajadores en entidades deportivas como determinante de los servicios deportivos. by Reyes Robles, Marina

    Published 2018
    “…Results: satisfactory indices were obtained within the exploratory and confirmatory factor analyzes, the values resulting from the reliability: Cronbach’s alpha, composite reliability and average variance extracted were acceptable for most if the factors except for the facility factor of the client/athlete survey that did not meet the recommended value, the correlation indexes, it is observed that all the factor of the poll of client/athlete survey as for the workers correlate positive and significantly among all the factors. …”
    Get full text
    Tesis
  20. 400

    Recubrimientos bimodales de WC-co-VC nanoestructurado aplicados por rociado térmico como alternativa del cromo hexavalente para trenes de aterrizaje. by Valladares Hernández, Julio César

    Published 2018
    “…To evaluate the coatings a central composite experimental design was used to study the effect vanadium carbide content and nanostructured particles concentration on the hardness, coefficient of friction and wear rate of WC-17Co-VC bimodal coatings. …”
    Get full text
    Tesis

Search Tools: