Resultados de búsqueda - "time"

Structural characterization of the equatorial F region plasma irregularities in the multifractal context por Joshi, Neelakshi, Rosa, Reinaldo R., Savio, Siomel, Kherani, Esfhan Alam, de Meneses, Francisco Carlos, Stephany, Stephan, Muralikrishna, Polinaya

“…The multifractal detrended fluctuation analysis and the p-model fit are used to analyze the plasma density fluctuation time series. The result shows the presence of multifractality with degree of multifractality 0.53–0.93 and 0.3≤p≤0.4 cascading probability for the first experiment. …”
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Electrospun Polyvinylpyrrolidone-Gelatin and Cellulose Acetate Bi-Layer Scaffold Loaded with Gentamicin as Possible Wound Dressing por López Calderón, Héctor Daniel, Avilés Arnaut, Hamlet, Galán Wong, Luis Jesús, Almaguer Cantú, Verónica, Laguna Camacho, J. R., Calderón Ramón, C., Escalante Martínez, J. E., Arévalo Niño, Katiushka

“…Once the values of the main variables for the electrospinning were optimized, a three-hour processing time was established to allow the separation of the material from the collector. …”
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Magnesium Removal from an Aluminum A-332 Molten Alloy Using Enriched Zeolite with Nanoparticles of SiO2 por Muñoz Arroyo, R., Hernández García, H. M., Escobedo Bocardo, J. C., Granda Gutiérrez, E. E., Acevedo Dávila, Jorge Leobardo, Aguilar Martínez, Josué Amilcar, Garza Gómez, A.

“…The Mg content of the molten alloy was measured after different periods of the injection time. Zeolites enriched with 2.5 and 5 wt-% of SiO2(NPs) were demonstrated to be the better mixtures, removing Mg from an initial content of 1.6 to a final content of 0.0002 and 0.0101 wt-%, respectively, in 45 min of injection.…”
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Differences in the presentation and treatment of primary liver tumors at a hepatology center and an oncology center por Rojas Pintor, K.P., Arizmendi Villarreal, M.A., Aparicio Salas, J.E., Moreno Peña, Diana Patricia, Hernández Barajas, David, Cordero Pérez, Paula, Muñoz Espinosa, Linda Elsa

“…Materials and methods: A retrospective observational study was conducted at the Hepatology Center (HC) and the University Center Against Cancer (UCAC), within the time frame of 2012---2018. HCC or intrahepatic CC was confirmed in 109 patients. …”
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Corrosion Behavior of Galvanized Steel Embedded in Concrete Exposed to Soil Type MH Contaminated With Chlorides por Baltazar Zamora, Miguel Ángel, Mendoza Rangel, José Manuel, Croche, René, Gaona Tiburcio, Citlalli, López, Luis, Olguín, Francisco, Almeraya Calderón, Facundo

“….% NaCl as aggressive agent by weight of soil, the exposure time was 260 days where, the results show that when the presence of NaCl in the soil was increased to 2 and 3% the levels of corrosion are from high to very high in all concretes, presenting a little better performance the concretes reinforced with galvanized steel and a small benefit could be identified or related to the properties of a denser and less impermeable matrix that presented the concrete mix made with cement CPC 30R RS.…”
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Electrochemical behaviour of galvanized steel embedded in concrete exposed to sand contaminated with NaCl por Baltazar Zamora, Miguel Ángel, Santiago Hurtado, Griselda, Moreno L., V.M., Croche B., R., De La Garza Garza, M., Estupiñan López, Francisco Humberto, Zambrano Robledo, Patricia del Carmen, Gaona Tiburcio, Citlalli

“…These specimens were exposed in a marine sand contaminated with 0, 1, 2 and 3% NaCl, the exposure time was 260 days where, according to the electrochemical results of ecorr and icorr, we could determine that the better performance of the specimens was galvanized steel and concrete made with cement CPC 30R RS, this research demonstrated the importance of developing special to elaborated concrete durability in aggressive environment such as is the ground where uproots all reinforced concrete structures.…”
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Effect of Cathodic Protection on Reinforced Concrete with Fly Ash Using Electrochemical Noise por García Contreras, Jorge, Gaona Tiburcio, Citlalli, López Cazares, Irene, Sánchez Díaz, Guillermo, Ibarra Castillo, Juan Carlos, Jáquez Muñoz, Jesús Manuel, Nieves Mendoza, Demetrio, Maldonado Bandala, Erick, Olguín Coca, Javier, López León, Luis Daimir, Almeraya Calderón, Facundo

“…The analysis of electrochemical noise-time series showed that the mixtures microstructure influenced the corrosion process. …”
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Characterization of Corrosion Behavior of Painted Galvanized Steel under Accelerated Conditions por Vázquez Rodríguez, Francisco Javier, De La Garza Garza, M., Gaona Tiburcio, Citlalli, Maldonado Bandala, Erick, Baltazar Zamora, Miguel Ángel, Garza C. R. de, J., García, R.O., Garza Montes de Oca, Nelson Federico, Ramírez R., J.L., Almeraya Calderón, Facundo

“…The results after 1080 and 3500 hours of exposure are presented, with adhesion measure (ASTM D-3359) and scratch resistance measure (D-1654) for each exposure time, as well as the characterization of corrosion attack through the mapping analysis of Scanning Electron Microscope / Energy Dispersive X-ray. …”
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Mg-Ca0.3 Electrochemical Activity Exposed to Hank’s Physiological Solution and Properties of Ag-Nano-Particles Deposits por González Murguía, José Luis, Veleva, Lucien, Rodríguez Gattorno, Geonel, Figueroa Torres, Mayra Zyzlila, Feliu, Sebastián

“…A combination of immersion test, electrochemical techniques (PDP, EIS, EN), and surface characterization methods (SEM-EDS, XRD, and XPS) were carried out. The pH change over time, the lower mass loss (≈20%), and the lower concentration of the released Mg2+ ions (≈3.6 times), as well as the lower level of the surface degradation, allowed to consider the positive effect of Ca, presenting Mg-Ca0.3 alloy with lower electrochemical activity than that of Mg. …”
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Observation of environments with different restorative potential results in differences in eye patron movements and pupillary size por Martínez Soto, Joel, De la Fuente Suárez, Luis Alfonso, Gonzáles Santos, Leopoldo, Barrios, Fernando A.

“…Eye movements related to LRP photographs were characterized by a greater number of fixations compared to those related to HRP. Fixation times predicted an inverse relation, with LRP settings having a significantly shorter time per fixation than HRP pictures. …”
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Copper Induces Damage, Oxidative Stress and Cell Death in Endothelium of Chronic Intoxicated Wistar Rats por Fernández Rodarte, Bernardo Alfonso, Soto Domínguez, Adolfo, González Navarro, Alejandro, Mellado Ayala, Maximiliano, Piña Mendoza, Edgar, Rodríguez Rocha, Humberto, Montes de Oca Luna, Roberto, Guerra Leal, Jesús Dante

“…Twenty-four male Wistar rats were included, the distribution of the groups was time-depending chronic exposition to copper, and a control group. …”
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Production and Preliminary Characterization of Linseed Mucilage-Based Films Loaded with Cardamom (Elettaria cardamomum) and Copaiba (Copaifera officinalis) por Treviño Garza, Mayra Zulema, Saldívar Vázquez, Ana Karen, López Villarreal, Sonia Martha, Lara Banda, María del Refugio, Elizondo Luévano, Joel Horacio, Chávez Montes, Abelardo, Báez González, Juan Gabriel, Rodríguez Luis, Osvelia Esmeralda

“…In addition, the solubilization time of the films (in artificial saliva) to release the active compounds fluctuates between 9 and 12 min. …”
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Use of Electrochemical Noise for the Study of Corrosion by Passivated CUSTOM 450 and AM 350 Stainless Steels por Almeraya Calderón, Facundo, Villegas Tovar, José Miguel, Lara Banda, María del Refugio, Jáquez Muñoz, Jesús Manuel, Estupiñan López, Francisco Humberto, Gaona Tiburcio, Citlalli

“…Two methods of data analysis were applied concerning EN: the domain of frequencies (power spectral density, PSD) and the time–frequency domain (Hilbert-Huang Transform). …”
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Field Evaluation of a Novel Trap Baited with Carbon Dioxide Produced by Yeast for the Collection of FemaleAedes aegyptiMosquitoes in Mexico por Laguna Aguilar, Maricela, Alvarado Moreno, Marcela Selene, Sánchez Rodríguez, Olga Saraí, Ramírez Jiménez, Rocío, Zárate Nahón, Erwy Arvid, Sánchez Casas, Rosa María, Fernández Salas, Ildefonso, Rebollar Téllez, Eduardo Alfonso

“…Production of carbon dioxide [Y = -631.24 + 941.26 (log x)] and the rate of mosquitoes captured per time period [Y = 20.29 + 23.50 (log x)] were best explained by logarithmic regressions. …”
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Detection of emerging pollutants using aptamer-based biosensors: recent advances, challenges, and outlook por Flores Contreras, Elda A., González González, Reyna Berenice, González González, Everardo, Melchor Martínez, Elda M., Parra Saldívar, Roberto, Iqbal, Hafiz M. N.

“…Furthermore, the superior characteristics of aptasensors have led to their applicability in the detection of harmful pollutants present in ever-increasing concentrations in different environmental matrices and water bodies, seeking to achieve simple and real-time monitoring. Considering the above-mentioned critiques and notable functional attributes of aptamers, herein, we reviewed aptamers as a fascinating interface to design, develop, and deploy a new generation of monitoring systems to aid modern bioanalytical sensing applications. …”
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Cosmological perturbation theory in f(Q,T) gravity por Nájera, Antonio, Fajardo, Amanda

“…We also derived a coupled system of differential equations between δ, the density contrast and v in the H << k limit and with negligible time derivative of the scalar perturbation potentials, which will be useful in future studies to see whether this class of theories constitute a good alternative to dark matter. …”
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Fault tolerant control by flatness approach por Martínez Torres, César

“…For such systems, it is possible to find a set of variables, named flat outputs such that states and control inputs can be expressed as functions of flat outputs and their time derivatives. The fault detection and isolation block has to provide a fast and accurate fault isolation, this action is carried out by exploiting the non-uniqueness property of the flat outputs, in fact if a second set of flat outputs algebraically independent and differentially coupled of the first are found, the number of residues augments. …”
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Antimicrobial Effect of Lactobacillus reuteri on Cariogenic Bacteria Streptococcus gordonii, Streptococcus mutans,and Periodontal Diseases Actinomyces naeslundii and Tannerella for... por Baca Castañon, Magda Lorena, De la Garza Ramos, Myriam Angélica, Alcázar Pizaña, Andrea Guadalupe, Grondin, Yohann, Coronado Mendoza, Anahí, Sánchez Nájera, Rosa Isela, Cárdenas Estrada, Eloy, Medina de la Garza, Carlos Eduardo, Escamilla García, Erandi

“…Before determining the antimicrobial action of L. reuteri on cariogenic bacteria and periodontal disease, the behavior and cell development time of each pathogenic bacterium were studied. Once the conditions for good cell growth of each of selected pathogens were established according to their metabolic requirements, maximum exponential growth was determined, this being the reference point for analyzing the development or inhibition by LAB using the Kirby Bauer method. …”
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Afectaciones en la producción de cerdos en una granja comercial en el noreste de México por Sánchez Dávila, Fernando, González Martínez, Fidencio, Bosque González, Alejandro Sergio del, Ibarra Gil, Humberto, Castillo Espinosa, Francisco J., Padilla Rivas, Gerardo Raymundo, Ledezma Torres, Rogelio Alejandro

“…Year group influenced the weaning-estrus interval, obtaining the lowest values in the groups 1992 -1994, 1995-1997, and 2004-2006. As for the time of service, no significant effects were found for the variables studied. …”
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Innovación social: Conceptos y etapas por Abreu Quintero, José Luis

“…It was determined that innovation is the result of a long historical process, an accumulation of small improvements and failed attempts at a critical time to change the sign of the trend, the direction of a process, the quality of a product or technique of a procedure. …”
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