Magnus Bygren, Richard Weigel, Sir Richard Branson, Alfonso Martinez Cearra, Espen Ronneberg, Raj Persaud,
The Economist SAP The World This Week At the summits The World This Week Legal immigrants? Intelsat The Economist The Economist subscription service The ...
2001 - Gale Group | The Economist
C.M. Magariños-Ascone, Fidel Martínez Ruiz, Arantza San Millán, Elena Montes, Ignacio Regidor, M Pedro, Roberto Figueiras‐Méndez,
... for more papers by this authorFidel Martínez Ruiz, Fidel Martínez Ruiz Unidad de Biomateriales, Hospital Ramón y Cajal, ... for more papers by this authorFidel Martínez Ruiz, Fidel Martínez Ruiz Unidad de Biomateriales, Hospital Ramón y Cajal, ...
Tópico(s): Epilepsy research and treatment
2010 - Wiley | Movement Disorders
Gabriel Alejandro Martínez-Castañón, Nereyda Niño‐Martínez, Fidel Martínez‐Gutiérrez, J.R. Martínez-Mendoza, Facundo Ruíz,
Tópico(s): Gold and Silver Nanoparticles Synthesis and Applications
2008 - Springer Science+Business Media | Journal of Nanoparticle Research
Montserrat López-Carrizales, Esmeralda Mendoza‐Mendoza, René D. Peralta, Mario Alberto Pérez-Díaz, Diana Patricia Portales‐Pérez, Martín Magaña-Aquino, Antonio Aragón‐Piña, Ramiro Infante, Enrique Díaz Barriga‐Castro, Roberto Sánchez‐Sánchez, Gabriel Alejandro Martínez-Castañón, Fidel Martínez‐Gutiérrez,
The purpose of this study was to generate novel chitosan hydrogels (CHs) loaded with silver nanoparticles (AgNPs) and ampicillin (AMP) to prevent early formation of biofilms. AgNPs and CHs were characterized by UV-Vis, DLS, TEM, rheology, FT-IR, Raman, and SEM. The antibiofilm effect of the formulations was investigated against four multidrug-resistant and extensively drug-resistant pathogens using a colony biofilm, a high cell density and gradients model. Also, their hemostatic properties and cytotoxic ...
Tópico(s): Vibrio bacteria research studies
2020 - Elsevier BV | Colloids and Surfaces B Biointerfaces
Jorge Luis Velázquez-Velázquez, Andrés Santos-Flores, Javier Araujo-Meléndez, Roberto Sánchez‐Sánchez, Cristina Velasquillo, Carmen González, Gabriel Alejandro Martínez-Castañón, Fidel Martínez‐Gutiérrez,
Infections arising from bacterial adhesion and colonization on chronic wounds are a significant healthcare problem. Silver nanoparticles (AgNPs) impregnated in dressing have attracted a great deal of attention as a potential solution. The goal of the present study was to evaluate the anti-biofilm activities of AgNPs impregnated in commercial dressings against Pseudomonas aeruginosa, bacteria isolated of chronic wounds from a hospital patient. The antimicrobial activity of AgNPs was tested within ...
Tópico(s): Antimicrobial agents and applications
2014 - Elsevier BV | Materials Science and Engineering C
Carolina Sámano-Valencia, Gabriel Alejandro Martínez-Castañón, Fidel Martínez‐Gutiérrez, Facundo Ruíz, Jorge F. Toro‐Vázquez, Juan A. Morales‐Rueda, Leon Francisco Espinosa-Cristóbal, Norma Verónica Zavala-Alonso, Nereyda Niño‐Martínez,
The presence of bacterial resistance to antibiotics is a very important issue and the search of new alternatives is necessary. In this work, a combination of chitosan gel with silver or gold nanoparticles was prepared and characterized using thermal, rheology, bactericide, and biocompatibility analyses. ESEM images were also taken to visualize the incorporation of the nanoparticles into the gel matrix. Thermal analysis showed a better thermal stability in the chitosan‐gold nanoparticles gels compared ...
Tópico(s): Graphene and Nanomaterials Applications
2014 - Hindawi Publishing Corporation | Journal of Nanomaterials
Juan Carlos Castillo-Martínez, Gabriel Alejandro Martínez-Castañón, Fidel Martínez‐Gutiérrez, Norma V. Zavala-Alonso, Nuria Patiño‐Marín, Nereyda Niño‐Martínez, Valentin Zaragoza-Magaña, Claudio Cabral‐Romero,
The objective of this work was to determine the bactericidal and antibiofilm activities of gold nanorods (AuNRs) using plasmonic photothermal therapy (PPTT) against oral microorganisms. AuNRs were synthesized by the seed and growth solution method and the gold nanoclusters were characterized with a size of 33.2 nm ± 2.23 length and 7.33 nm ± 1.60 width. The efficacy of PPTT related to its temperature was done reaching 67°C. Minimum inhibitory concentration (MIC) and minimum bactericide concentration (MBC) ...
Tópico(s): Nanoplatforms for cancer theranostics
2015 - Hindawi Publishing Corporation | Journal of Nanomaterials
Mario Alberto Pérez-Díaz, Laura Boegli, Garth A. James, Cristina Velasquillo, Roberto Sánchez‐Sánchez, Rita-Elizabeth Martínez-Martínez, Gabriel Alejandro Martínez-Castañón, Fidel Martínez‐Gutiérrez,
Microbial resistance represents a challenge for the scientific community to develop new bioactive compounds. The goal of this research was to evaluate the antimicrobial activity of silver nanoparticles (AgNPs) against a clinical isolate of Streptococcus mutans, antibiofilm activity against mature S. mutans biofilms and the compatibility with human fibroblasts. The antimicrobial activity of AgNPs against the planktonic clinical isolate was size and concentration dependent, with smaller AgNPs having ...
Tópico(s): Antimicrobial Peptides and Activities
2015 - Elsevier BV | Materials Science and Engineering C
Elizabeth Alvarado-Gómez, Mario Alberto Pérez-Díaz, Donato Valdez‐Pérez, J. Ruiz-Garcı́a, Martín Magaña-Aquino, Gabriel Alejandro Martínez-Castañón, Fidel Martínez‐Gutiérrez,
A biofilm is a very complex consortium formed by a mix of different microorganisms, which have become an important health problem, because its formation is a resistance mechanism used by bacteria against antibiotics or the immune system. In this work, we show differences between some physicochemical properties of biofilms in mono- and multi-species, formed by bacteria from clinical samples of infected chronic wounds. Of the most prevalent bacteria in wounds, two mono- and one multi-species biofilms ...
Tópico(s): Antimicrobial Peptides and Activities
2017 - Elsevier BV | Materials Science and Engineering C
Montserrat López-Carrizales, Karla Itzel Velasco, Claudia G. Castillo, Andrés Flores, Martín Magaña, Gabriel Alejandro Martínez-Castañón, Fidel Martínez‐Gutiérrez,
The increase in the prevalence of bacterial resistance to antibiotics has become one of the main health problems worldwide, thus threatening the era of antibiotics most frequently used in the treatment of infections. The need to develop new therapeutic strategies against multidrug resistant microorganisms, such as the combination of selected antimicrobials, can be considered as a suitable alternative. The in vitro activities of two groups of conventional antimicrobial agents alone and in combination ...
Tópico(s): Kidney Stones and Urolithiasis Treatments
2018 - Multidisciplinary Digital Publishing Institute | Antibiotics
Mario Alberto Pérez-Díaz, Phaedra Silva-Bermúdez, Binisa Jiménez-López, Valentín Martínez-López, Yaaziel Melgarejo-Ramírez, Ana Brena-Molina, Clemente Ibarra, Isabel Baeza, M.E. Martínez-Pardo, Ma. Lourdes Reyes-Frías, Érik Agustín Márquez-Gutiérrez, Cristina Velasquillo, Gabriel Alejandro Martínez-Castañón, Fidel Martínez‐Gutiérrez, Roberto Sánchez‐Sánchez,
Treatment of severe or chronic skin wounds is an important challenge facing medicine and a significant health care burden. Proper wound healing is often affected by bacterial infection; where biofilm formation is one of the main risks and particularly problematic because it confers protection to microorganisms against antibiotics. One avenue to prevent bacterial colonization of wounds is the use of silver nanoparticles (AgNPs); which have proved to be effective against non-multidrug-resistant and ...
Tópico(s): Mesenchymal stem cell research
2018 - BioMed Central | Journal of Nanobiotechnology
Carlos Bermúdez‐Jiménez, Nereyda Niño‐Martínez, Nuria Patiño‐Marín, Fidel Martínez‐Gutiérrez, Facundo Ruíz, Horacio Bach, Gabriel Alejandro Martínez-Castañón,
Abstract Biofilms are matrices synthesized by bacteria containing polysaccharides, DNA, and proteins. The development of biofilms in infectious processes can induce a chronic inflammatory response that may progress to the destruction of tissues. The treatment of biofilms is difficult because they serve as a bacterial mechanism of defense and high doses of antibiotics are necessary to treat these infections with limited positive results. It has been demonstrated that photothermal therapy using gold ...
Tópico(s): Biosensors and Analytical Detection
2019 - Wiley | Journal of Biomedical Materials Research Part B Applied Biomaterials
Nereyda Niño‐Martínez, Gabriel Alejandro Martínez-Castañón, Antonio Aragón‐Piña, Fidel Martínez‐Gutiérrez, J.R. Martínez-Mendoza, Facundo Ruiz,
Silver nanoparticles with a narrow size distribution were synthesized over the surface of two different commercial TiO(2) particles using a simple aqueous reduction method. The reducing agent used was NaBH(4); different molar ratios TiO(2):Ag were also used. The nanocomposites thus prepared were characterized using transmission electron microscopy (TEM), scanning transmission electron microscopy (STEM), scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS), x-ray photoelectron spectroscopy ( ...
Tópico(s): Gold and Silver Nanoparticles Synthesis and Applications
2008 - IOP Publishing | Nanotechnology
Mario Alberto Pérez-Díaz, Elizabeth Alvarado-Gómez, Martín Magaña-Aquino, Roberto Sánchez‐Sánchez, Cristina Velasquillo, Carmen González, Adriana Ganem‐Rondero, Gabriel Alejandro Martínez-Castañón, Norma V. Zavala-Alonso, Fidel Martínez‐Gutiérrez,
The development of multi-species biofilms in chronic wounds is a serious health problem that primarily generates strong resistance mechanisms to antimicrobial therapy. The use of silver nanoparticles (AgNPs) as a broad-spectrum antimicrobial agent has been studied previously. However, their cytotoxic effects limit its use within the medical area. The purpose of this study was to evaluate the anti-biofilm capacity of chitosan gel formulations loaded with AgNPs, using silver sulfadiazine (SSD) as a ...
Tópico(s): Bacterial biofilms and quorum sensing
2015 - Elsevier BV | Materials Science and Engineering C
Elizabeth Alvarado-Gómez, Gabriel Alejandro Martínez-Castañón, Roberto Sánchez-Sánchez, Adriana Ganem‐Rondero, Miguel José Yacamán, Fidel Martínez‐Gutiérrez,
The skin wounds cause serious burden to healthcare systems. The lack of sterility of the innate barrier function of the skin facilitates the development of microbial communities within the wound environment especially in biofilm form. Since biofilm is difficult to eradicate, new treatments have been established, such as silver nanoparticles (AgNPs), which antimicrobial and anti-biofilm properties have been studied, nevertheless, their toxic effects are known too. Different concentrations of AgNPs ...
Tópico(s): Antimicrobial agents and applications
2018 - Elsevier BV | Materials Science and Engineering C
Iliana Jasso-Padilla, Bertha I. Juárez-Flores, Gregorio Álvarez-Fuentes, Alejandro De la Cruz Martínez, José Enrique González-Ramírez, Mario Moscosa-Santillán, Marco Martín González‐Chávez, Cuauhtémoc Oros‐Ovalle, Florian Prell, Peter Czermak, Fidel Martínez‐Gutiérrez,
BACKGROUND Inulin and other fructans are synthesized and stored in mezcal agave (Agave salmiana). Fructans provide several health benefits and have excellent technological properties, but only few data report their physiological effect when added in the diet. RESULTS Here, we studied the physiological effects of fructans obtained from A. salmiana when added in the diet of Wistar rats. Results showed favorable changes on Wistar rats when the fructans was added to their diet, including the decrease ...
Tópico(s): Food composition and properties
2016 - Wiley | Journal of the Science of Food and Agriculture
Daniel Vázquez-Maldonado, Vicente Espinosa-Solís, César Leyva‐Porras, Patricia Aguirre-Bañuelos, Fidel Martínez‐Gutiérrez, Manuel Román-Aguirre, María Zenaida Saavedra-Leos,
The effect of bacteria (Bacillus clausii) addition on the culturability and antioxidant activity of resveratrol prepared by spray drying was studied in this work. Inulin and lactose were employed as carrying agents and their performance compared. Resveratrol microencapsulated in inulin showed the highest antioxidant activity (26%) against free radicals. The co-encapsulated materials (bacteria and resveratrol) in inulin and lactose showed similar activities (21%, and 23%, respectively) suggesting that ...
Tópico(s): Probiotics and Fermented Foods
2020 - Multidisciplinary Digital Publishing Institute | Processes
Fidel Martínez Roget, Pilar Freire Esparís, Emilia Vázquez Rozas,
One of the main objectives of the Undergraduate Dissertation is to evaluate the skills associated with a degree. Student satisfaction with the training and skills acquired can be an indicator of the quality of higher education. This paper aims to analyse student satisfaction with Undergraduate Dissertation at the Faculty of Economics of the University of Santiago de Compostela (Spain). Based on a survey conducted among 130 students (75.7% of a total of 172 students who presented their UD during the ...
Tópico(s): Evaluation of Teaching Practices
2020 - Multidisciplinary Digital Publishing Institute | Education Sciences
Ramón Montes-Molina, Maria Antonia Madroñero-Agreda, Ana Belen Romojaro-Rodríguez, Vanessa Gallego-Mendez, Carolina Prados-Cabiedas, Cesar Marques-Lucas, Monica Pérez-Ferreiro, Fidel Martínez-Ruiz,
The aim of this study was to evaluate the effectiveness of an interferential pattern generated by two identical and independent lasers in the relief of knee pain.Low-level laser therapy (LLLT) is generally applied by a single probe.A double-blind controlled clinical trial was performed on 152 patients with knee pain who were randomly assigned into two different groups. Group I patients (n = 76) received interferential laser therapy generated by two identical laser probes located opposite each other ...
Tópico(s): Dental Anxiety and Anesthesia Techniques
2009 - Mary Ann Liebert, Inc. | Photomedicine and Laser Surgery
Juan Francisco Hernández-Sierra, Facundo Ruíz, Diana Corina Cruz Pena, Fidel Martínez‐Gutiérrez, Alberto Emilio Martínez, Amaury Pozos‐Guillén, Humberto Tapia-Pérez, Gabriel Alejandro Martínez-Castañón,
Dental caries is a worldwide public health problem for which Streptococcus mutans has been identified as the possible infectious etiology. In recent years nanotechnology has permitted the development of new properties of materials. The objective of this study was to compare the bactericidal and bacteriostatic effects of nanoparticles of silver, zinc oxide, and gold on S. mutans. We used the liquid dilution method to find the minimum inhibitory concentrations (MICs) and with subcultures obtained the ...
Tópico(s): Scientific and Engineering Research Topics
2008 - Elsevier BV | Nanomedicine Nanotechnology Biology and Medicine
Silvia Borrelli, Wesley F. Zandberg, Sankar Mohan, Mary Ko, Fidel Martínez‐Gutiérrez, Sarathy Karunan Partha, D.A.R. Sanders, Yossef Av‐Gay, Bernardine M. Pinto,
The galactofuran region of the mycobacterial cell wall consists of alternating 5- and 6-linked β-d-galactofuranose (β-d-Galf) residues, essential for viability. UDP-galactofuranose (UDP-Galf), the donor for Galf, is synthesised from UDP-galactopyranose (UDP-Galp) by the enzyme UDP-galactopyranose mutase (UGM), which is not found in humans, rendering it a therapeutic target. The in vitro properties, i.e. enzymatic activity, antimycobacterial activity, cellular toxicity, activity in mycobacterial-infected ...
Tópico(s): Tuberculosis Research and Epidemiology
2010 - Elsevier BV | International Journal of Antimicrobial Agents
María Pilar Murias Fernández, Simone Novello, Fidel Martínez Roget,
Abstract Murias P., Novello S. and Martinez F. The regions of economic well-being in Italy and Spain, Regional Studies. When analysing economic performance, regional studies highlight the limits of income-level indicators and recommend the use of multidimensional notions. This paper proposes a composite indicator of regional economic well-being based on data envelopment analysis, including income distribution, legacy for future generations or economic security, and which respects the distinctiveness ...
Tópico(s): Regional Development and Policy
2010 - Routledge | Regional Studies
Fidel Martínez‐Gutiérrez, Peggy L. Olive, Adriana Banuelos, E. Orrantia, Nereyda Niño‐Martínez, Elpidio Morales Sánchez, Facundo Ruíz, Horacio Bach, Yossef Av‐Gay,
Microbial resistance represents a challenge for the scientific community to develop new bioactive compounds. Nosocomial infections represent an enormous emerging problem, especially in patients with ambulatory treatment, which requires that they wear medical devices for an extended period of time. In this work, an evaluation of the antimicrobial activity of both silver and titanium nanoparticles was carried out against a panel of selected pathogenic and opportunistic microorganisms, some of them ...
Tópico(s): Antimicrobial agents and applications
2010 - Elsevier BV | Nanomedicine Nanotechnology Biology and Medicine
Fidel Martínez‐Gutiérrez, Emily P. Thi, Judith M. Silverman, Carolina Camargo de Oliveira, Sarah L. Svensson, Amanda Vanden Hoek, Elpidio Morales Sánchez, Neil E. Reiner, Erin C. Gaynor, Edward L.G. Pryzdial, Edward M. Conway, E. Orrantia, Facundo Ruíz, Yossef Av‐Gay, Horacio Bach,
The incorporation of nanoparticles (NPs) in industrial and biomedical applications has increased significantly in recent years, yet their hazardous and toxic effects have not been studied extensively. Here, we studied the effects of 24 nm silver NPs (AgNPs) on a panel of bacteria isolated from medical devices used in a hospital intensive care unit. The cytotoxic effects were evaluated in macrophages and the expression of the inflammatory cytokines IL-6, IL-10 and TNF-α were quantified. The effects ...
Tópico(s): Advanced Nanomaterials in Catalysis
2011 - Elsevier BV | Nanomedicine Nanotechnology Biology and Medicine
Ramón Montes-Molina, Almudena Prieto-Baquero, M. Elena, Ana Belen Romojaro-Rodríguez, Vanesa Gallego-Méndez, Fidel Martínez-Ruiz,
Background Interference is an important feature of the waves. When two or more in phase light waves meet, a new and reinforced wave is generated. Shoulder pain is a common clinical problem and laser is one of the treatments frequently used to relieve it. Objective To test the safety of interferential laser therapy generated by two independent low level lasers and compare its effectiveness with conventional single laser therapy in the reduction of shoulder musculoskeletal pain and associated disability. ...
Tópico(s): Pain Management and Treatment
2011 - Elsevier BV | Physiotherapy
... Cabiedas, Cesar Marques-Lucas, Monica Pérez-Ferreiro, and Fidel Martinez-Ruiz1 July 2009 | Photomedicine and Laser Surgery, Vol. ...
Tópico(s): Photodynamic Therapy Research Studies
2006 - Mary Ann Liebert, Inc. | Photomedicine and Laser Surgery
María Pilar Murias Fernández, Fidel Martínez Roget, Carlos de Miguel,
Tópico(s): Spatial and Panel Data Analysis
2006 - Springer Science+Business Media | Social Indicators Research
Fidel Martínez Roget, Xosé Antón Rodríguez González,
This paper is a study of rural tourism demand in Galicia by means of panel data. The dependent variable used is the number of overnight stays. Empirical results suggest that the number of overnight stays in rural tourism establishments depends basically on economic determinants, such as the price of services in rural tourism establishments, the extent of transport (travel) costs and the economic cycle (tourists' income). The income variable exhibits the highest elasticity. Besides the influence of ...
Tópico(s): Consumer Market Behavior and Pricing
2006 - SAGE Publishing | Tourism Economics
Fidel Martínez Roget, Xosé Antón Rodríguez González,
The degree of capacity utilization affects the measurement of total productivity. This paper uses establishment occupancy level as a proxy for establishment capacity utilization. Accordingly, the authors decompose total factor productivity (TFP) growth into technical progress, changes in allocative efficiency, changes in occupancy levels, changes in technical efficiency and scale effects. The empirical results show that the occupancy level component offers the most important contribution to TFP. ...
Tópico(s): Economic and Environmental Valuation
2006 - SAGE Publishing | Tourism Economics
Xosé Antón Rodríguez González, Fidel Martínez Roget, Ewa Pawłowska,
The last few decades have witnessed a dramatic increase in the mobility of higher education students. When fulfilling certain conditions, this type of mobility can actually be considered a type of tourist activity. This paper justifies the choice of the term "academic tourism" to describe such a form of tourism. Further to this, its primary purpose is to identify the main determinants that drive the demand of academic tourism in Galicia. An empirical analysis has been carried out using a dynamic ...
Tópico(s): Conferences and Exhibitions Management
2012 - Elsevier BV | Tourism Management