... Fuentes, ‘La Dimensión Económica de los Acuerdos de Paz’, in Ruben Zamora et al. (eds), A Cinco Anos de la Firma de la Paz en Guatemala: un Balance Critico, Serie Debate 51 ( ...
Tópico(s): Local Government Finance and Decentralization
2009 - Taylor & Francis | New Political Economy
Jesús Jiménez-Román, Gabriel Lazcano-Gómez, Karina Martínez-Baez, Mauricio Turati, Rosario Gulías-Cañizo, Luis Fernando Hernández-Zimbrón, Lenin David Ochoa-de la Paz, Rubén Zamora, Roberto González-Salinas,
AIM: To compare the effect of phacoemulsification on intraocular pressure (IOP) in patients with primary open angle glaucoma (POAG) and pseudoexfoliation glaucoma (PXG). METHODS: A retrospective comparative case series conducted at the Glaucoma Department at the Association to Prevent Blindness in Mexico. The study enrolled consecutive patients having phacoemulsification with intraocular lens (IOL) implantation and a diagnosis of POAG or PXG. Data about IOP values and number of glaucoma medications ...
Tópico(s): Retinal Diseases and Treatments
2017 - Press of International Journal of Ophthalmology (IJO PRESS) | International Journal of Ophthalmology
H. M.J.A. van Liempd, Ora Oudgenoeg‐Paz, Ruben Fukkink, Paul Leseman,
Exploration plays a key role in the development of children. While exploring, children develop new skills by perceiving and acting upon the possibilities for action that are specified in the environment. This study examined the relations between young children's exploration during free play and the spatial characteristics of the indoor playroom space in childcare centers, using an observation scheme based on Gibson's theory of perception-action affordances. The study was carried out in mixed-age ...
Tópico(s): Children's Rights and Participation
2017 - Elsevier BV | Early Childhood Research Quarterly
Produção Nacional
Revisado por pares
Liana Pinho Ferreira, Rachel Costa Sabry, Patrícia Mirella da Silva, Tarsis F. Gesteira, Lidiane de Souza Romão, Marcela Pinheiro Paz, Rubens Galdino Feijó, Maximiano Pinheiro Dantas Neto, Rodrigo Maggioni,
This is the first report of Perkinsus sp. (Bivalvia: Veneridae) infecting wild clams of the species Anomalocardia brasiliana in Brazil. The gill lamellae and rectum of 150 specimens of A. brasiliana collected in the Timonha river estuary (Ceará, Northeastern Brazil) in March 2012 were incubated in Ray's fluid thioglycollate medium (RFTM) for detection of Perkinsus sp. In RFTM, the prevalence of Perkinsus sp. was 14.7% (22/150) and the intensity of infection ranged from very light (1–10 cells across the ...
Tópico(s): Marine Bivalve and Aquaculture Studies
2014 - Elsevier BV | Experimental Parasitology
Rosalía Cristina Paz, Rubén Rocco, Herminda Reinoso, Ana Menéndez, Fernando L. Pieckenstain, Óscar A. Ruiz,
Tópico(s): Plant responses to water stress
2012 - Springer Science+Business Media | Journal of Plant Growth Regulation
Rogelio Sánchez‐Vega, H. Mújica-Paz, Rúben Márquez-Meléndez, Michael Ngadi, E. Ortega‐Rivas,
ABSTRACT Apple juice was pasteurized by an ultra-high temperature treatment (UHT) at 115, 125 and 135C for 3 and 5 s, and compared with a high-voltage pulsed electric field treatment (PEF) at ranges between 33 and 42 kV/cm with frequencies of 150, 200, 250 and 300 pulses per second (pps). Enzyme inactivation and physicochemical properties of the treated juices were compared using a nontreated sample as control. The UHT treatment was more efficient in enzyme inactivation, reducing 95% the residual activity ...
Tópico(s): Food Drying and Modeling
2009 - Wiley | Journal of Food Processing and Preservation
Leandro A. Miranda, Dante A. Paz, Rubén Dezi, A Pisanó,
Changes in the pituitary cells involved in amphibian metamorphosis were studied in Bufo arenarum tadpoles with inhibited thyroid function. After hatching, larvae were treated for 5 months with potassium perchlorate (KCIO4), a goitrogenic substance known to prevent absorption of iodine from water or food, resulting in impaired thyroid hormone synthesis. Treated larvae continued to grow but halted their development in premetamorphosis, showing hyperplasic thyroid glands with disorganized follicles ...
Tópico(s): Physiological and biochemical adaptations
1995 - Elsevier BV | General and Comparative Endocrinology
Leandro A. Miranda, Dante A. Paz, Rubén Dezi, A Pisanó,
Tópico(s): Neurobiology and Insect Physiology Research
1995 - Springer Science+Business Media | Cell and Tissue Research
Roberto González-Salinas, Luis Fernando Hernández-Zimbrón, Rosario Gulías-Cañizo, Mario Alberto Sánchez-Vela, Lenin David Ochoa-de la Paz, Ruben Zamora, Hugo Quiroz–Mercado,
The integrin family of cell adhesion molecules mediates homeostasis, signal transduction, and various other interactions between the cell and the extracellular matrix. Integrins are type-1 transmembrane glycoproteins located on the cell surface, widely expressed in leukocytes, which play an important role in the inflammatory pathway. The purpose of this review is to summarize the current state of anti-integrin therapy and to assess ongoing clinical trials in ocular disease. We performed a search ...
Tópico(s): Immune Response and Inflammation
2017 - Taylor & Francis | Seminars in Ophthalmology
Pablo Bordón, Rubén Paz, Carolina Peñalva, Gisela Del Carmen Vega Rodríguez, Mario Monzón, Lidia García,
Bags used to protect and accelerate the ripening of bananas are a clear example of the environmental problem of packaging waste. Small pieces of these non-biodegradable bags are frequently disposed on the soil by accident (environmental conditions and poor handling during the harvest) and remain there for years. This work focuses on the development of protective biodegradable bags reinforced with banana fiber, obtained from waste of the banana plants, thus promoting a circular economy and a more ...
Tópico(s): biodegradable polymer synthesis and properties
2021 - Multidisciplinary Digital Publishing Institute | Agronomy
Zaida Ortega, Francisco Romero, Rubén Paz, Luis Suárez, Antonio Benítez, María Dolores Marrero-Alemán,
This paper compares the mechanical properties of different natural fiber composites produced by rotational molding as a way of waste valorization from campaigns to control invasive plant species in Macaronesia. Rotomolded parts produced with polymeric matrices (polyethylene) and filled with up to 20% by weight of cellulosic fibers obtained from Arundo donax L., Pennisetum setaceum, and Ricinus communis plants were characterized in terms of tensile, flexural, and impact strength. It was found that ...
Tópico(s): Additive Manufacturing and 3D Printing Technologies
2021 - Multidisciplinary Digital Publishing Institute | Polymers
Dragan Kusić, Uroš Božič, Mario Monzón, Rubén Paz, Pablo Bordón,
Several natural materials and vegetable waste have relevant mechanical properties, mainly in its fiber format. Particularly, banana fiber (BF) provides a close behavior to the widely spread glass fibers, which places it in an advantageous position for use as a reinforcing material in plastic composites. This work characterizes the behavior of acrylonitrile butadiene styrene (ABS), high impact polystyrene (HIPS), and high density polyethylene (HDPE) reinforced with short fibers of bananas from the Canary ...
Tópico(s): Microplastics and Plastic Pollution
2020 - Multidisciplinary Digital Publishing Institute | Materials
Rubén Paz, R. Moriche, Mario Monzón, Carlos Joshua García Montagut,
The influence of manufacturing parameters of filament extrusion and extrusion-based Additive Manufacturing (AM), as well as different post processing techniques, on the electrical conductivity of 3D printed parts of graphene nanoplatelets (GNP)-reinforced acrylonitrile butadiene styrene (ABS) has been analyzed. The key role of the manufacturing parameters to obtain electrically conductive filaments and 3D printed parts has been demonstrated. Results have shown that an increase in extrusion speed, as ...
Tópico(s): Advanced Sensor and Energy Harvesting Materials
2020 - Multidisciplinary Digital Publishing Institute | Polymers
Zaida Ortega, Jessica Castellano, Luis Suárez, Rubén Paz, N. Díaz, Antonio Benítez, María Dolores Marrero-Alemán,
This paper summarises the results obtained from the characterization assays from century plant (Agave americana L.), determining the chemical composition of different parts of the plant. Fibres were obtained by means of a mechanical device, specifically designed and built for Agave americana leaves processing. Obtained fibres were subjected to thermogravimetric analysis and infrared spectra, and their chemical composition was also determined by quantitative acid hydrolysis. Once obtained, fibres ...
Tópico(s): Polysaccharides Composition and Applications
2019 - Springer Nature | SN Applied Sciences
Mario Monzón, Rubén Paz, Martí Verdaguer, Luis Suárez, P. Badalló, Zaida Ortega, N. Díaz,
The use of natural fibres allows reducing environmental impact, due to their natural renewable origin and the lower energy needed for their production and processing. This work presents the mechanical characterization of a newly developed technical textile, with banana fibre treated by enzymes, comparing experimental results with numerical simulation based on the definition of the unit cell at micromechanical level. The experimental test shows that the composite with the fabric of banana fibre presents ...
Tópico(s): Additive Manufacturing and 3D Printing Technologies
2019 - Multidisciplinary Digital Publishing Institute | Materials
Eujin Pei, Giselle Hsiang Loh, David Harrison, Henrique A. Almeida, Mario Monzón, Rubén Paz,
Abstract Purpose The purpose of this paper is to extend existing knowledge of 4D printing, in line with Khoo et al. (2015) who defined the production of 4D printing using a single material, and 4D printing of multiple materials. It is proposed that 4D printing can be achieved through the use of functionally graded materials (FGMs) that involve gradational mixing of materials and are produced using an additive manufacturing (AM) technique to achieve a single component. Design/methodology/approach The ...
Tópico(s): Additive Manufacturing and 3D Printing Technologies
2017 - Emerald Publishing Limited | Assembly Automation
Mario Monzón, Zaida Ortega, A. Falcón Hernández, Rubén Paz, Zaida Ortega,
Digital light processing (DLP) is an accurate additive manufacturing (AM) technology suitable for producing micro-parts by photopolymerization. As most AM technologies, anisotropy of parts made by DLP is a key issue to deal with, taking into account that several operational factors modify this characteristic. Design for this technology and photopolymers becomes a challenge because the manufacturing process and post-processing strongly influence the mechanical properties of the part. This paper shows ...
Tópico(s): Manufacturing Process and Optimization
2017 - Multidisciplinary Digital Publishing Institute | Materials
Rubén Paz, Eujin Pei, Mario Monzón, Zaida Ortega, Luis Suárez,
4D printing is a technology that combines the capabilities of 3D printing with materials that can transform its geometry after being produced (e.g. Shape Memory Polymers). These advanced materials allow shape change by applying different stimulus such as heating. A 4D printed part will usually have 2 different shapes: a programmed shape (before the stimulus is applied), and the original shape (which is recovered once the stimulus has been applied). Lightweight parametric optimization techniques are ...
Tópico(s): Design Education and Practice
2017 - IOS Press | Integrated Computer-Aided Engineering
Jose Luis Pérez‐Gracia, Miguel F. Sanmamed, Ana Bosch, Ana Patiño‐García, Kurt A. Schalper, Víctor Segura, Joaquim Bellmunt, Josep Tabernero, Christopher J. Sweeney, Toni K. Choueiri, Miguel Martín, Juan P. Fusco, María E. Rodríguez-Ruiz, Alfonso Calvo, Celia Prior, Luis Paz‐Ares, Rubén Pı́o, Enrique González‐Billalabeitia, Álvaro González Hernández, David Páez, Josep M. Piulats, Alfonso Gúrpide, Mapi Andueza, Guillermo de Velasco, Roberto Pazo, Enrique Grande, Pilar Nicolás, Francisco Abad‐Santos, Jesús García-Donás, Daniel Castellano, María J. Pajares, Cristina Suárez, Rámón Colomer, Luis M. Montuenga, Ignacio Melero,
The discovery of reliable biomarkers to predict efficacy and toxicity of anticancer drugs remains one of the key challenges in cancer research. Despite its relevance, no efficient study designs to identify promising candidate biomarkers have been established. This has led to the proliferation of a myriad of exploratory studies using dissimilar strategies, most of which fail to identify any promising targets and are seldom validated. The lack of a proper methodology also determines that many anti- ...
Tópico(s): Colorectal Cancer Treatments and Studies
2016 - Elsevier BV | Cancer Treatment Reviews
Mario Monzón, Rubén Paz, Eujin Pei, Zaida Ortega, Luis Suárez, Zaida Ortega, Maria Elena Alemán‐Domínguez, T. Plucinski, Nathan Clow,
The fourth dimension in 4D printing refers to the ability of materials to alter its form after they are produced, thereby providing additional functional capabilities and performance-driven applications. Stimuli materials provide this capability through the use of shape memory polymers. For this research, the property of programming the determined shape is achieved through controlled heat under laboratory conditions. This paper shows the potential to process and experiment with thermoplastic polyurethane ...
Tópico(s): Advanced Sensor and Energy Harvesting Materials
2016 - Springer Science+Business Media | The International Journal of Advanced Manufacturing Technology
Zaida Ortega, Moisés Morón, Mario Monzón, P. Badalló, Rubén Paz,
Natural fibers have been used as an alternative to synthetic ones for their greener character; banana fibers have the advantage of coming from an agricultural residue. Fibers have been extracted by mechanical means from banana tree pseudostems, as a strategy to valorize banana crops residues. To increase the mechanical properties of the composite, technical textiles can be used as reinforcement, instead of short fibers. To do so, fibers must be spun and woven. The aim of this paper is to show the ...
Tópico(s): Textile materials and evaluations
2016 - Multidisciplinary Digital Publishing Institute | Materials
Rodolfo Lacy, Mario J. Molina, Mabel Vaca, Carlos Serralde, Graciela Hernandez, Gerardo Ríos, Erika Guzman, Rubén Paz, Ricardo Requena Pérez,
Carbon capture, use and geological storage (CCUS) could be feasible when fossil fuel-power plants are close to oil and gas reservoirs where CO2-enhanced oil recovery (EOR) technologies are applicable. In this research, we used a novel “well-to-well” approach that included the operations from natural gas production at oil field to CO2 injection for EOR operations at depleted oil fields. This paper includes estimates for greenhouse gas (GHG) emissions arising from a hypothetical CCUS case with a natural ...
Tópico(s): Carbon Dioxide Capture Technologies
2015 - Elsevier BV | International journal of greenhouse gas control
Paz Catalán, Rubén Leta, A. Hidalgo, José Montiel, Xavier Alomar, David Viladés, Antonio Barros, Sandra Pujadas, Francesc Carreras, Josep M. Padró, Juan Cinca, Guillem Pons‐Lladó,
Purpose To assess the usefulness of preoperative coronary computed tomographic (CT) angiography in the detection of coronary artery disease (CAD) in nonselected patients scheduled to undergo noncoronary cardiovascular surgery to avoid unnecessary invasive coronary angiography (ICA). Materials and Methods The institutional review board approved the study protocol; informed consent was given. This prospective study involved 161 consecutive patients who underwent coronary calcium scoring and coronary ...
Tópico(s): Advanced X-ray and CT Imaging
2010 - Radiological Society of North America | Radiology
Pablo Cañizares, Rubén Paz, Cristina Sáez, Manuel A. Rodrigo,
In the work described here the technical and economic feasibilities of three Advanced Oxidation Processes (AOPs) have been studied: Conductive-Diamond Electrochemical Oxidation (CDEO), Ozonation and Fenton oxidation. The comparison was made by assessing the three technologies with synthetic wastewaters polluted with different types of organic compounds and also with actual wastes (from olive oil mills and from a fine-chemical manufacturing plant). All three technologies were able to treat the wastes, ...
Tópico(s): Electrochemical Analysis and Applications
2008 - Elsevier BV | Journal of Environmental Management
Pablo Cañizares, Leopoldo Martínez, Rubén Paz, Cristina Sáez, Justo Lobato, Manuel A. Rodrigo,
Abstract In this work, the electrochemical oxidation of an actual industrial waste with conductive diamond anodes has been studied. The wastewater is the effluent of a wastewater treatment plant consisting of a Fenton reactor followed by a settler and a sand filter, in which the wastes generated in an olive oil mill are treated. These wastes contain a residual chemical oxygen demand of nearly 700 mg dm −3 which cannot be further oxidized with the Fenton process. The electrolyses were carried out ...
Tópico(s): Electrochemical sensors and biosensors
2006 - Wiley | Journal of Chemical Technology & Biotechnology
Andrea Bernasconi, Roxana Marino, Alejandra Ribas, Jorge G. Rossi, Marta Ciaccio, Matías Oleastro, Alicia Ornani, Rubén Paz, Marco A. Rivarola, Marta Zelazko, Alicia Belgorosky,
STAT5 proteins are components of the common growth hormone and interleukin 2 family of cytokines' signaling pathway. Mutations in the STAT5b gene, described in 2 patients, lead to growth hormone insensitivity that resembles Laron syndrome. Clinical immunodeficiency was also present, although immunologic defects have not been well characterized thus far. Here we describe a 16-year-old girl who suffered generalized eczema and recurrent infections of the skin and respiratory tract since birth. She ...
Tópico(s): Digestive system and related health
2006 - American Academy of Pediatrics | PEDIATRICS
A. Maldonado, R. Asomoza, J. Cañetas‐Ortega, Elisa Zironi, Rubén Paz, Rodrigo Patiño, O. Solorza‐Feria,
The optical, electrical and structural properties of polycrystalline ZnO : In thin films grown from starting solutions with different pH values are reported. The films were deposited on glass substrates by spray pyrolysis at temperatures below 500°C. Zinc acetate dissolved in an aqueous solution was used as a precursor. Different amounts of acetic acid were added to change the pH of the solution to two different values. The average optical transmission of the films was above 85% and the film thickness ...
Tópico(s): Gas Sensing Nanomaterials and Sensors
1999 - Elsevier BV | Solar Energy Materials and Solar Cells
Ricardo Donate, Rubén Paz, R. Moriche, M.J. Sayagués, Maria Elena Alemán‐Domínguez, Mario Monzón,
Despite the dramatic change that Tissue Engineering or stem cell therapies have brought to current therapeutic strategies, there is a lack of functionalities in the available biomaterials for manufacturing scaffolds to treat several highly prevalent osseous diseases (osteochondral defects, osteoporosis, etc.). One promising approach to fill this gap involves the development of innovative piezoelectric scaffolds for improved bone regeneration. Scaffolds with the appropriate piezoelectricity can positively ...
Tópico(s): Bone Tissue Engineering Materials
2023 - Elsevier BV | Materials & Design
Pablo Bordón, Daniel Elduque, Rubén Paz, Carlos Javierre, Dragan Kusić, Mario Monzón,
The global consumption of thermoplastic materials of fossil origin continues to grow, generating high environmental impacts mainly due to the energy consumed during their production and processing. The use of natural materials, such as banana fiber (BF), present a sustainable alternative for the gradual replacement of these thermoplastic materials, potentially reducing the environmental impact and improving their mechanical performance. This work presents the development of HDPE compounds reinforced ...
Tópico(s): Microplastics and Plastic Pollution
2022 - Elsevier BV | Journal of Cleaner Production
Luis Suárez, Zaida Ortega, Francisco Romero, Rubén Paz, María Dolores Marrero-Alemán,
Abstract This paper assesses the modifications in the properties of rotomolded polyethylene (PE) and polylactic acid (PLA) composites obtained with 5 and 10% giant reed fibers, mainly focusing on the alterations due to a bio-disintegration process. Thermal properties (melting temperature and crystallinity degree), morphology (via optical and scanning electron microscopy), and chemical changes (by Fourier Transformed Infrared spectroscopy) were studied. Composites with untreated and NaOH-treated fibers ...
Tópico(s): Microplastics and Plastic Pollution
2022 - Springer Science+Business Media | Journal of Polymers and the Environment