Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12104/44262
Title: Rheology of wormlike micelles from non-equilibrium molecular dynamics
Author: Mendoza, L.D.
Rabelero, M.
Escalante, J.I.
Macias, E.R.
Gonzalez-Alvarez, A.
Bautista, F.
Soltero, J.F.A.
Puig, J.E.
Issue Date: 2008
Abstract: The linear and non-linear viscoelastic behaviors of polymer-like micellar solutions of cetyltrimethylammonium tosilate (CTAT) with added NaOH and tetraethyl orthosilicate (TEOS) to produce precursors of mesoporous materials are studied. The effect of TEOS/CTAT (T/C) ratio at fixed CTAT concentration, CTAT concentration at fixed T/C and aging time are reported. The systems show increasingly larger deviations from near-Maxwell behavior upon increasing T/C ratio, CTAT concentration and aging. Moreover, in steady and unsteady shear-flow, shear banding develops between two critical shear rates, which tend to fade as the T/C ratio and aging increase. The Granek-Cates model is employed to analyze linear viscoelastic behavior. The Bautista-Manero-Puig (BMP) model is used here to reproduce the steady and transient nonlinear rheology of these systems. We explain these results in terms of the changes in inter-macromolecular interactions that arise out of the presence of colloidal additives in the viscoelastic gel. The ordered mesoporous materials were identified by X-ray diffractometry (XRD) and high-resolution transmission electron microscopy. " 2008 Elsevier Inc. All rights reserved.",,,,,,"10.1016/j.jcis.2007.12.024",,,"http://hdl.handle.net/20.500.12104/44262","http://www.scopus.com/inward/record.url?eid=2-s2.0-39549120680&partnerID=40&md5=562c34cff0f862a997b9bb612e41a019
http://ovidsp.ovid.com/ovidweb.cgi?T=JS&CSC=Y&NEWS=N&PAGE=fulltext&D=prem&AN=18221750",,,,,,"1",,"Journal of Colloid and Interface Science",,"290
297",,"320",,"Scopus
MEDLINE
WOS",,,,,,"Colloidal additives; Inter-macromolecular interactions; Polymer-like micelles; Viscoelastic behavior",,,,,,"Rheological behavior of surfactant-based precursors of silica mesoporous materials",,"Article" "46065","123456789/35008",,"González-Mercado, A., División de Genética, Centro de Investigación Biomédica de Occidente, IMSS, Mexico, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico; Sánchez-López, J.Y., División de Genética, Centro de Investigación Biomédica de Occidente, IMSS, Mexico, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico; Ibarra, B., División de Genética, Centro de Investigación Biomédica de Occidente, IMSS, Mexico, Universidad de Guadalajara, Guadalajara, Jalisco, Mexico",,"Gonzalez-Mercado, A.
Sanchez-Lopez, J.Y.
Ibarra, B.",,"2013",,"Objective. To know risk factors and the frequency of osteoporosis (OP) in postmenopausal women. Materials and methods. Bone mineral density was measured in lumbar spine of 513 postmenopausal women from a hospital of Guadalajara, Jalisco during 2007-2008. The cutoff points of the associated variables were obtained by ROC curves and odds ratio (OR) by logistic regression. Results. The 25.2% (95%CI 21.44-28.96) of the women was OP. The variables associated with OP and cutoff points were age >60 years, weight <71kg, height <1.54m and BMI <9.2kg/m2, with OR greater than 3.19 (p<0.0001). Conclusions. It is recommended setting cutoff points to estimate risk factors for OP more accurately in each population.",,,,,,,,,"http://hdl.handle.net/20.500.12104/44286","http://www.scopus.com/inward/record.url?eid=2-s2.0-84890701998&partnerID=40&md5=1ce8321fe8dfc1f804c518ddbf023049",,,,,,"6",,"Salud Publica de Mexico",,"627
630",,"55",,"Scopus
WOS",,,,,,"Bone density; Mexico; Postmenopausal osteoporosis",,,,,,"Risk factors for osteoporosis in postmenopausal women from Guadalajara, Jalisco [Factores de riesgo para osteoporosis en mujeres posmenopáusicas de guadalajara, Jalisco]",,"Article" "46059","123456789/35008",,"Reynaga-Delgado, E., Centro de Investigaciones Biológicas Del Noroeste, Col. Playa Palo de Santa Rita Apdo, La Paz, BCS 23090, Mexico; Gómez-Salazar, S., Universidad de Guadalajara-Centro Universitario de Ciencias Exactas e Ingenierías, Blvd. Marcelino García Barragán 1451, Guadalajara, Jalisco, Mexico; Ascencio-Valle, F., Centro de Investigaciones Biológicas Del Noroeste, Col. Playa Palo de Santa Rita Apdo, La Paz, BCS 23090, Mexico; Rodriguez-Estrella, R., Centro de Investigaciones Biológicas Del Noroeste, Col. Playa Palo de Santa Rita Apdo, La Paz, BCS 23090, Mexico; Celis, A., Universidad de Guadalajara-Centro Universitario de Ciencias de la Salud, Sierra Mojada 950, Guadalajara, Jalisco, Mexico; Villarruel-López, A., Universidad de Guadalajara-Centro Universitario de Ciencias Exactas e Ingenierías, Blvd. Marcelino García Barragán 1451, Guadalajara, Jalisco, Mexico",,"Reynaga-Delgado, E.
Gomez-Salazar, S.
Ascencio-Valle, F.
Rodriguez-Estrella, R.
Celis, A.
Villarruel-Lopez, A.",,"2013",,"The risk exposure to agents causing waterborne diseases (WBD), such as bacteria, parasites, and metals (Cr, Cd, Mn, and Pb) in a group of volunteers (n =20) and an external group of three locations of the El Ahogado Basin, Mexico, is reported. A complete blood count (CBC) was made on the volunteers, and factor analysis was used for the CBC. Bacteria and parasitological agents were also monitored at the six sites of the El Ahogado Basin between 2008 and 2010. The measured blood concentrations of Cu, Mn, and Pb were 37.1, 4.6, and 7.1 ?g/g, indicating the lowest exposure of volunteers to Mn and Pb and the highest exposure to Cu. The volunteer groups of the El Ahogado Basin are more exposed to agents causing WBD compared to the volunteers of the external group.",,,,,,"10.2175/106143013X13736496909392",,,"http://hdl.handle.net/20.500.12104/44280","http://www.scopus.com/inward/record.url?eid=2-s2.0-84888604074&partnerID=40&md5=8dcf1cdcc358a3b4042ce31c79a866ad",,,,,,"11",,"Water Environment Research",,"2175
2183",,"85",,"Scopus
WOS",,,,,,"Biomarkers; Cross-sectional study; Environmental epidemiology; Unsafe water; Water quality",,,,,,"Risk exposure to agents causing waterborne diseases in the El Ahogado Basin, Mexico",,"Article" "46028","123456789/35008",,"Matute, Esmeralda Universidad de Guadalajara",,"Matute, Esmeralda Universidad de Guadalajara",,"2006",,,,,,,,,,"0188-8900","http://hdl.handle.net/20.500.12104/44249",,,"Español",,,,"32",,"Fuentes humanísticas",,"19-26",,,,"CLASE",,,,,,,,"Investigación educativa",,,,"Habilidades cognitivas y lectura de un texto en escolares",,"journalArticle" "46054","123456789/35008",,"Reinhold, JohnG., Department of Biochemistry, Faculty of Medicine, University of Guadalajara, Guadalajara, Mexico",,"Reinhold JohnG.",,"1976",,"[No abstract available]",,,,,,"10.1016/S0140-6736(76)91104-1",,,"http://hdl.handle.net/20.500.12104/44275","http://www.scopus.com/inward/record.url?eid=2-s2.0-0017312161&partnerID=40&md5=532b7ab0b685ad24fcf5b09ff78dae59",,,,,,"7995",,"The Lancet",,"1132
1133",,"308",,"Scopus",,,,,,,,,,,,"RICKETS IN ASIAN IMMIGRANTS",,"Letter" "46033","123456789/35008",,"Rodríguez-Martínez, L., Adolfo López Mateos Avenue, 1801 Aguascalientes, Aguascalientes, Mexico; Mora, M., Autonomous University of Aguascalientes, Universidad Avenue, 940 Aguascalientes, Aguascalientes, Mexico; Álvarez, F., Autonomous University of Aguascalientes, Universidad Avenue, 940 Aguascalientes, Aguascalientes, Mexico; Garza, L., Autonomous University of Aguascalientes, Universidad Avenue, 940 Aguascalientes, Aguascalientes, Mexico; Durán, H., Universidad de Guadalajara, Periforico Norte, 799 Zapopan, Jalisco, Mexico; Muñoz, J., Autonomous University of Aguascalientes, Universidad Avenue, 940 Aguascalientes, Aguascalientes, Mexico",,"Rodriguez-Martinez, L.
Mora, M.
Alvarez, F.
Garza, L.
Duran, H.
Munoz, J.",,"2012",,"Service-oriented software engineering (SoSE) is a new paradigm for building software systems, fostered by the availability of a new -but already mature- computing technology based on services. SoSE advances the current object-oriented and the component-based software engineering paradigms. Under that new paradigm, multiple software-system development life cycle (SDLC) methodologies have been proposed; however, none of them have gained a total acceptance as the dominant SDLC in SoSE. On this theoretical and practical situation, we believe that a research is required to reach more standardized and stabilized knowledge about SDLCs in SoSE. Thus, this article reviews nine recent SDLCs proposed for SoSE with the aim to present a descriptive-comparative landscape of a relevant range of SDLCs for SoSE. Such description-comparison is guided by two criteria: (i) the extent of completeness of each SDLC, with respect to the proposed phases, activities and delivered artifacts, and (ii) the extent of the Boehm-Turner's Rigor-Agility balance. Our results suggest that only three of the nine SDLCs studied already provide the best level of completeness and Rigor-Agility. Finally, we consider that the reported descriptivecomparative framework and their findings from each SDLC can be useful also for comparing and elaborating future SDLCs in SoSE.",,,,,,,,,"http://hdl.handle.net/20.500.12104/44254","http://www.scopus.com/inward/record.url?eid=2-s2.0-84861040714&partnerID=40&md5=d434c66c94c1d73e5f03ed9fea3839e8
http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1665-64232012000200003&lng=es&nrm=iso&tlng=en; http://132.248.9.1:8991/F/QYBFCDEMMK86QP7AN8HS2AYCPJC21Q8TXQAKE7H5DVGALAVUKF-12173?func=full-set-set&set_number=029909&set_entry=000131&format=999",,,,,,"2",,"Journal of Applied Research and Technology",,"94
113",,"10",,"Scopus
PERIODICA
ScIELO
WOS",,,,,,"Boehm-Turner's Rigor-Agility balance level; Service-oriented software engineering (SoSE); Service-oriented software systems (SoSS); Software development methodologies; System development life cycle (SDLC) / Engineering, Electrical & Electronic; Engineering, Multidisciplinary",,"Programación",,,,"Review of relevant system development life cycles (SDLCs) in service-oriented software engineering (SoSE)",,"Review" "46052","123456789/35008",,"Castillo-Tejas, J., Facultad de Ciencias Básicas, Ingeniería y Tecnología, Universidad Autónoma de Tlaxcala, Calzada Apizaquito S/N, Apizaco, Tlaxcala, 90300, Mexico; Alvarado, J.F.J., Departamento de Ingeniería Química, Instituto Tecnológico de Celaya, Avenida Tecnológico y García Cubas S/N, Celaya, Guanajuato, 38010, Mexico; Carro, S., Facultad de Ciencias Básicas, Ingeniería y Tecnología, Universidad Autónoma de Tlaxcala, Calzada Apizaquito S/N, Apizaco, Tlaxcala, 90300, Mexico; Pérez-Villaseñor, F., Facultad de Ciencias Básicas, Ingeniería y Tecnología, Universidad Autónoma de Tlaxcala, Calzada Apizaquito S/N, Apizaco, Tlaxcala, 90300, Mexico; Bautista, F., Departamento de Ingeniería Química CUCEI, Universidad de Guadalajara, Boulevard M.García Barragán No. 1451, Guadalajara, Jalisco, 44430, Mexico; Manero, O., Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Ciudad Universitaria, Distrito Federal, 04510, Mexico",,"Castillo-Tejas, J.
Alvarado, J.F.J.
Carro, S.
Perez-Villasenor, F.
Bautista, F.
Manero, O.",,"2011",,"In this work, the rheology of complex fluids, i.e., surfactants of varying concentration in a Lennard-Jones fluid, is analyzed with non-equilibrium molecular dynamics simulations. The molecular model considers that the surfactant molecule is composed of a hydrophilic head, affine to solvent, and a hydrophobic tail made of four monomers. The solvent is modeled by a Lennard-Jones fluid, which shows mostly a Newtonian behavior, but at relatively high shear rates, a slight shear-thinning followed by a slight shear thickening are exhibited. The intermolecular potential produces an equilibrium configuration, in which the surfactant molecules self-assemble in a wormlike micelle. With the aim to analyze the system behavior with various stress fields, two flows are simulated under non-equilibrium conditions: (1) simple shear and (2) Poiseuille's flow. In simple shear, by keeping the velocity of the upper plate of the flow cell constant, a monotonic flow curve is predicted within a range of shear rates. At low shear rates, a concentration-dependent Newtonian region of viscosity ?0 corresponds to an isotropic condition in which the wormlike micelle preserves its equilibrium conformation. At intermediate shear rates, the solution exhibits a slight shear thinning, generating bands placed normal to the gradient direction (gradient banding). At high shear rates the solution exhibits shear-thickening, with bands now generated normal to the vorticity direction. These predictions by molecular models explain, to our knowledge for the first time, experiments in shear-thickening wormlike micellar solutions, where shear-thickening appears simultaneously with bands generated perpendicular to the vorticity axis. In Poiseuille's flow, we also find agreement between predictions of the model with theoretical developments and experiments performed by other authors. " 2010 Elsevier B.V.
URI: http://hdl.handle.net/20.500.12104/44273
http://www.scopus.com/inward/record.url?eid=2-s2.0-78651445326&partnerID=40&md5=306858e3f09d47b3f756de5d6946b7cc
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