Científica: Depósitos recientes

Mostrando ítems 541-560 de 806

Properties of gypsum composites containing vermiculite and polypropylene fibers: Numerical and experimental results

OSMAN, GENCEL; del Coz Diaz, Juan Jose; Sutcu, Mucahit; KÖKSAL, Fuat; MARTINEZ BARRERA, GONZALO; BROSTOW, WITOLD KONRAD (Energy and Buildings, 2014-02-01)

We have added expanded vermiculite and polypropylene fibers with low thermal conductivity to light weight gypsum. Thermal conductivity of the composites decreases on addition of vermiculite aspore-maker. Physical and ...
Polypropylene Fiber Reinforced Polymer Concrete: effect of gamma radiation

MARTINEZ BARRERA, GONZALO; Martinez Hernandez, Ana; VELASCO SANTOS, CARLOS; MARTINEZ LOPEZ, MIGUEL; ORTIZ ESPINOZA, JESUS; LAREDO DOS REIS, JOAO MARCIANO (Smithers Group Company, 2014-02-01)

Design of polymer concrete involves extensive studies on their materials in order to get improved properties; specifically on the physicochemical properties of both polymer resin and mineral aggregates, including size and ...
Influence of 1D and 2D carbon fillers and their functionalisation on crystallisation and thermomechanical properties of injection moulded nylon 6,6 nanocomposites

NAVARRO PARDO, FABIOLA; Martinez_Hernandez, Ana L.; Castaño Meneses, Víctor Manuel; MEDELLIN RODRIGUEZ, FRANCISCO JAVIER; MARTINEZ BARRERA, GONZALO; VELASCO SANTOS, CARLOS (Hindawi, 2014-07-01)

Carbon nanotubes (CNTs) and graphene were used as reinforcing fillers in nylon 6,6 in order to obtain nanocomposites by using an injection moulding process. The two differently structured nanofillers were used in their ...
Waste tire particles and gamma radiation as modifiers of the mechanical properties of concrete

HERRERA SOSA, EDUARDO SADOT; MARTINEZ BARRERA, GONZALO; BARRERA DIAZ, CARLOS EDUARDO; CRUZ ZARAGOZA, EPIFANIO (Hindawi, 2014-03-01)

In polymer reinforced concrete, the Young’s modulus of both polymers and cement matrix is responsible for the detrimental properties of the concrete, including compressive and tensile strength, as well as stiffness. A novel ...
Polymer concrete reinforced with luffa fibers: effect of gamma radiation

MARTINEZ BARRERA, GONZALO; MARTINEZ LOPEZ, MIGUEL; VIGUERAS SANTIAGO, ENRIQUE; OSMAN, GENCEL; BEYCIOGLU, AHMET; LAREDO DOS REIS, JOAO MARCIANO (Rev. Téc. Ing. Univ. Zulia, 2014-03-01)

The interest of many research groups regarding manufacture of composite materials by using natural fibers is increasing world-wide. The main objectives involve the improvement of mechanical properties, mainly those related ...
Waste and recycling materials used in concrete

MARTINEZ BARRERA, GONZALO; BROSTOW, WITOLD KONRAD; HERNANDEZ LOPEZ, SUSANA (International Journal of Advances in Science Engineering and Technology, 2015-03-01)

Materials with higher strength and high performanceprovide excellent benefits. But after a very short useful-life become waste and contribute to environmental degradation. Some investigations are focused on recycling by ...
Recovery and modification of waste tire particles and their use as reinforcements of concrete

HERRERA SOSA, EDUARDO SADOT; MARTINEZ BARRERA, GONZALO; BARRERA DIAZ, CARLOS EDUARDO; CRUZ ZARAGOZA, EPIFANIO; UREÑA NUÑEZ, FERNANDO (Hindawi, 2015-08-01)

Environmental pollution caused by solid wastes is increasing in the last decades; one of these is referred to automotive tires, which are recycled by differentmethods, includingmechanical grinding. One of the most recurrent ...
Waste materials from Tetra Pak packages as reinforcement of polymer concrete

MARTINEZ LOPEZ, MIGUEL; MARTINEZ BARRERA, GONZALO; BARRERA DIAZ, CARLOS EDUARDO; UREÑA NUÑEZ, FERNANDO; BROSTOW, WITOLD KONRAD (Hindawi, 2015-09-01)

In this work, different concentrations (from 1 to 6 wt%) and sizes (0.85, 1.40 and 2.36 mm) of waste Tetra Pak particles replaced partially silica sand in polymer concrete. As is well known Tetra Pak packages are made up ...
Novel Porous Materials Solution for Instability Decrease of Problem Soils under Buildings

LOPEZ LARA, TERESA; HERNANDEZ ZARAGOZA, JUAN VOSCO; CARREON FREYRE, DORA CELIA; ROJAS GONZALEZ, EDUARDO; MARTINEZ BARRERA, GONZALO; HORTA RANGEL, JAIME MOISES; RODRIGUEZ MORALES, NORMA PAULINA (Wulfenia Org, 2015-10-01)

Problem clay soils represent a great cracking problem for all light buildings over them because of volumetric instability caused by variations in moisture. A generalized solution has been to extract them and substituted ...
Synthesis of EDTA core dendrimers through a consecutive esterification-CuAAC process

Ramírez Palma, María Teresa; Apolonio, Víctor M.; González, Jaime; Martínez Barrera, Gonzalo; Corona-Becerril, David; Cuevas-Yañez, Erick (Taylor and Francis, 2017-12-01)

A novel class of thermostable G0 and G1-dendrimers was synthesized from the coupling of both propargyl and azido esters derived from EDTA through copper catalyzed azide-alkyne cycloaddition. The branching and size in ...
Characterization of recycled polycarbonate from electronic waste and its use in hydraulic concrete: improvement of compressive performance

DE LA COLINA MARTINEZ, ANA LAURA; MARTINEZ BARRERA, GONZALO; BARRERA DIAZ, CARLOS EDUARDO; Ávila Córdoba, Liliana Ivette; UREÑA NUÑEZ, FERNANDO (Techno Press, 2017-11-01)

Transparency, excellent toughness, thermal stability and a very good dimensional stability make Polycarbonate (PC) one of the most widely used engineering thermoplastics. Polycarbonate market include electronics, automotive, ...
Civil engineering applications of polymer composites

MARTINEZ BARRERA, GONZALO; OSMAN, GENCEL; LAREDO DOS REIS, JOAO MARCIANO (Hindawi, 2016-02-01)

Researches have been done in order to improve performance of concrete and structures. As we know, polymers provide huge opportunities for the advancement of materials research, the improvement of material property, and the ...
Effect of size and composition on the second harmonic generation from lithium niobate powders at different excitation wavelengths

SANCHEZ DENA, OSWALDO; GARCIA RAMIREZ, EMMA VIANEY; FIERRO RUIZ, CESAR DAVID; VIGUERAS SANTIAGO, ENRIQUE; FARIAS MANCILLA, JOSE RURIK; REYES ESQUEDA, JORGE ALEJANDRO (IOPSCIENCE, 2017-03-15)

LiNbO3 microcrystalline systems, possessing almost stoichiometric composition, were produced by varying the temperature and time parameters in the annealing processes following a mechanochemical reaction of raw powders. ...
Optical properties of carbon nanostructures produced by laser irradiation on chemically modified multi-walledcarbon nanotubes

VIGUERAS SANTIAGO, ENRIQUE; HERNANDEZ LOPEZ, SUSANA; REYES CONTRERAS, DELFINO; FARIAS MANCILLA, JOSE RURIK; FLORES GALLARDO, SERGIO GABRIEL; HERNANDEZ ESCOBAR, CLAUDIA ALEJANDRA; ZARAGOZA CONTRERAS, ERASTO ARMANDO (Optics & Laser Technology, 2016-10-01)

This research focused on the nanosecond(Nd:YAG-1064 nm) laser pulse effect on the optical and morphological properties of chemically modified multi-walled carbon nanotubes(MWCNT).Two sus- pensions of MWCNT in tetrahydrofuran ...
Conductive Polymer Composites Synthesized from Diacetylene-Functionalized Linseed Oil and MWCNT: Gamma Irradiation and Organic Vapor Sensing

RAMIREZ JIMENEZ, ALEJANDRO; HERNANDEZ LOPEZ, SUSANA; BUCIO CARRILLO, EMILIO; VIGUERAS SANTIAGO, ENRIQUE (Scrivener Publishing, 2017-04-01)

Epoxidized linseed oil (ELO) was synthesized and functionalized with propargylamine (PA) or 3-ethynylaniline (EA) and the products were crosslinked to obtain the diacetylene-functionalized epoxidized linseed oil polymers ...
Click chemistry of multi-walled carbon nanotubes-G-1,3-diazido-2-isopropanol with alkyne groups

ESTEVEZ MARTINEZ, YOXKIN; DURON TORRES, SERGIO MIGUEL; Alaniz Lumbreras, Pedro Daniel; JIMENEZ SANDOVAL, SERGIO JOAQUIN; RAMIREZ PALMA, MARIA TERESA; GONZALEZ ARRATIA, JAIME; Cuevas Yáñez, Erick; Castaño Meneses, Víctor Manuel (Advanced Study Center Co. Ltd. (St.Petersburg, Russia), 2017-12-08)

The click chemistry was employed on oxidized multiwall carbon nanotubes for their functionalization with 1,3-diazido-2-isopropanol (2N3OH). Phenylacetylene and propargylamine are used as alkyne groups, catalyzed with copper ...
Acoplamiento de nanoparticulas de oro con el factor de crecimiento epidermico ( nps de au-egf) y determinacion de sus interacciones

GONZALEZ PEDROZA, MARIA GUADALUPE (Universidad Autónoma del Estado de México, 2016-09)

En la actualidad, los usos biomédicos del acoplamiento de nanopartículas de oro (NPs de Au) con el Factor de Crecimiento Epidérmico (EGF) han tenido un gran auge dentro de la comunidad científica debido a su actividad ...
Modelling and Simulation of the Radiant Field in an Annular Heterogeneous Photoreactor Using a Four-Flux Model

ALVARADO ROLON, OSCAR; NATIVIDAD RANGEL, REYNA; ROMERO ROMERO, RUBI; Hurtado Alva, María de Lourdes; RAMIREZ SERRANO, ARMANDO (Hindawi, 2018-01-28)

This work focuses on modeling and simulating the absorption and scattering of radiation in a photocatalytic annular reactor. To achieve so, a model based on four fluxes (FFM) of radiation in cylindrical coordinates to ...
Removal of Pb, Cu, Cd, and Zn Present in Aqueous Solution Using Coupled Electrocoagulation-Phytoremediation Treatment

FERNIZA GARCIA, FRANCISCO; AMAYA CHAVEZ, ARACELI; ROA MORALES, GABRIELA; BARRERA DIAZ, CARLOS EDUARDO (International Journal of Electrochemistry, 2017-07-02)

This study presents the results of a coupled electrocoagulation-phytoremediation treatment for the reduction of copper, cadmium, lead, and zinc, present in aqueous solution. The electrocoagulation was carried out in a batch ...
Estructura y propiedades magnéticas de polímeros de coordinación de Mn, Co y Cu basados en ligantes trans, trans-muconato y derivados de 2,2’-bipiridinas

Jaramillo Garcia , Jonathan (Universidad Autónoma del Estado de México, 2017-12-07)

In the present work the coordination polymers [Mn(muco)(5,5´-dmbp) (OH2)]n (1); [Cu(OH2) (4,4-dmbp) (muco)]n·2H2O (3); [Cu(OH2)(5,5´-dmbp)(muco)]n·2H2O (4), where (muco) is the bridging ligand trans, trans-muconic acid ...

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