C. Guzmán, José Luis Carrera, Héctor Durán-Muñoz, Javier Berumen, Alberto Ortiz, Omar A. Guirette-Barbosa, Angélica Arroyo, Jorge Brizuela, Fabio Abel Gómez Becerra, Andrés Blanco Ortega, Héctor Ramón Azcaray, Marlen Hernández Ortiz,
Virtual sensing is crucial in order to provide feasible and economical alternatives when physical measuring instruments are not available. Developing model-based virtual sensors to calculate real-time information at each targeted location is a complex endeavor in terms of sensing technology. This paper proposes a new approach for model-based virtual sensor development using computational fluid dynamics (CFD) and control. Its main objective is to develop a three-dimensional (3D) real-time simulator ...
Tópico(s): Plant Water Relations and Carbon Dynamics
2018 - Multidisciplinary Digital Publishing Institute | Sensors
Ricardo Acosta Ortiz, Omar Acosta Berlanga, Aida Esmeralda García Valdez, Rafael Aguirre Flores, José Guadalupe Télles Padilla, María Guadalupe Méndez Padilla,
A rapid and efficient method to obtain self-healing epoxy resins is discussed. This method is based on the use of a thiol-disulfide oligomer obtained by partial oxidation of a multifunctional thiol using a hypervalent iodine (III) compound as oxidant. The oligomer was characterized by Fourier transform infrared spectroscopy (FTIR), Raman and nuclear magnetic resonance spectroscopies, and gel permeation chromatography (GPC). The oligomer was a joint component of the thiol-ene system along with a tetra- ...
Tópico(s): Photochromic and Fluorescence Chemistry
2016 - Hindawi Publishing Corporation | Advances in Materials Science and Engineering
Germán Bayona, Andrés Valencia, Alejandro Mumbrú Mora, María Dolores Hernández Rueda, Johan Ortiz, Omar Montenegro,
El corazonamiento del pozo SALTARIN-1A, perforado en el sector Este de la cuenca de los Llanos, es el primer registro de roca de la parte superior de la Formacion Carbonera (124.1 m perforados) y las formaciones Leon (344,8 m) y Guayabo (441,8 m). La integracion de las observaciones litofaciales, petrologicas y paleontologicas permitieron definir ambientes sedimentarios, superficies de correlacion estratigraficas, la edad de los estratos y posibles areas de procedencia. Estos pozos estratigraficos ...
Tópico(s): Geological and Tectonic Studies in Latin America
2008 - | Geología Colombiana
Lizbeth Guilbert, Cristian J. Ortíz, Omar Espinosa, Elisa Sepúlveda, Tatiana Piña, Paul Joo, Carlos Zerrweck,
The latest diabetes consensus identified obesity as key component of the metabolic syndrome. The role of bariatric surgery over such syndrome has been less explored with a lack of long term studies, and especially among Mexicans. Retrospective study including patients with metabolic syndrome submitted to laparoscopic gastric bypass at a single institution with complete data after 24 months. The objective was to analyze the improvement of the syndrome and each component. Demographic, anthropometric, ...
Tópico(s): Diet and metabolism studies
2018 - Wolters Kluwer | International Journal of Surgery
Luisa M. Arias-Giraldo, Marina Muñoz, Carolina Hernández, Giovanny Herrera, Natalia Velásquez-Ortiz, Omar Cantillo‐Barraza, Plutarco Urbano, Andrés M. Cuervo, Juan David Ramírez,
Abstract Background Triatomines are hematophagous insects that play an important role as vectors of Trypanosoma cruzi , the causative agent of Chagas disease. These insects have adapted to multiple blood-feeding sources that can affect relevant aspects of their life-cycle and interactions, thereby influencing parasitic transmission dynamics. We conducted a characterization of the feeding sources of individuals from the primary circulating triatomine genera in Colombia using amplicon-based next-generation ...
Tópico(s): Parasitic Diseases Research and Treatment
2020 - BioMed Central | Parasites & Vectors
Luisa M. Arias-Giraldo, Marina Muñoz, Carolina Hernández, Giovanny Herrera, Natalia Velásquez-Ortiz, Omar Cantillo‐Barraza, Plutarco Urbano, Juan David Ramírez,
Triatomines (Hemiptera: Reduviidae) are the insect vectors of Trypanosoma cruzi , the causative agent of Chagas disease. The gut bacterial communities affect the development of T . cruzi inside the vector, making the characterization of its composition important in the understanding of infection development. We collected 54 triatomine bugs corresponding to four genera in different departments of Colombia. DNA extraction and PCR were performed to evaluate T . cruzi presence and to determine the discrete ...
Tópico(s): Parasitic Diseases Research and Treatment
2020 - Public Library of Science | PLoS ONE
Mauricio Velázquez-Martínez, Silvia López-Ortíz, Omar Hernández‐Mendo, Pablo Díaz‐Rivera, Sergio Pérez‐Elizalde, Jaime Gallegos–Sánchez,
Grazing behavior, diet selection and weight gain of heifers (with or without social models) were assessed in an unfamiliar site containing high plant diversity. The study was performed within a tropical forest ecosystem containing a mixture of grass forb/herb, shrub and tree species. Ten inexperienced crossbred Bos taurus × Bos indicus heifers (7 ± 1 months old) were randomly assigned to one of two groups: naive or naive + social model (sm) and two experienced heifers (16 months old) were assigned to the ...
Tópico(s): Rabbits: Nutrition, Reproduction, Health
2010 - Elsevier BV | Livestock Science
Bodo E. Knudsen, Ricardo Miyaoka, Ketul Shah, Timothy R. Holden, Thomas Türk, Renato N. Pedro, Carly Kriedberg, Bryan Hinck, Omar Ortiz-Alvarado, Manoj Monga,
Objectives To evaluate the durability of 4 next-generation flexible ureteroscopes in a randomized, multi-institutional, prospective study. Methods Patients at 3 institutions were randomized to 1 of 4 flexible ureteroscopes: the Wolf Viper, Olympus URF-P5, Gyrus-ACMI DUR-8 Elite (DUR-8E), and Stryker FlexVision U-500. Each center used 1 scope from each manufacturer until it needed major repair (primary endpoint). Intraoperative data included total time of use, number of scope insertions through an ...
Tópico(s): Renal and Vascular Pathologies
2009 - Elsevier BV | Urology
Omar Ortiz-Alvarado, J. Kyle Anderson,
Tópico(s): MRI in cancer diagnosis
2010 - Springer Science+Business Media | World Journal of Urology
Ruth Noriega‐Cisneros, Omar Ortiz‐Avila, Edgar Esquivel‐Gutiérrez, Mónica Clemente‐Guerrero, Salvador Manzo‐Ávalos, Rafael Salgado‐Garciglia, Christian Cortés‐Rojo, István Boldogh, Alfredo Saavedra‐Molina,
Diabetes mellitus (DM) is a significant risk factor for the development of cardiovascular complications. This study was undertaken to investigate the effect of chronic administration of ethanolic extract of Eryngium carlinae on glucose, creatinine, uric acid, total cholesterol, and triglycerides levels in serum of streptozotocin- (STZ-) induced diabetic rats. Triglycerides, total cholesterol, and uric acid levels increased in serum from diabetic rats. The treatment with E. carlinae prevented these ...
Tópico(s): Mangiferin and Mango Extracts
2011 - Hindawi Publishing Corporation | Biochemistry Research International
Ken Haberman, Omar Ortiz-Alvarado, Ekkarin Chotikawanich, Manoj Monga,
Background and Purpose: Despite the evolution and progressive improvements of ureteroscopes, problems related to visibility and maneuverability can still hinder the goals of surgical intervention. We evaluate the attributes of a dual-channel flexible ureteroscope compared with a single-channel device and discuss the implications for expanded techniques afforded by this new technology. Materials and Methods:In vitro measurements of active deflection, irrigant flow through the working channel, luminescence, ...
Tópico(s): Ureteral procedures and complications
2011 - Mary Ann Liebert, Inc. | Journal of Endourology
Omar Ortiz-Alvarado, Ricardo Miyaoka, Carly Kriedberg, David Leavitt, Angela Moeding, Michelle Stessman, Manoj Monga,
Objective To investigate the use of fish oil in the dietary management of hypercalciuric stone formers. Prostaglandins have been linked to urinary calcium excretion, suggesting a role for omega-3 fatty acids in the treatment of hypercalciuric urolithiasis. Methods We retrospectively studied a cohort of patients treated at our stone clinics from July 2007 to February 2009. Patients' urinary risk factors for stone disease were evaluated with pre- and post-intervention 24-hour urine collections. All patients ...
Tópico(s): Alcohol Consumption and Health Effects
2011 - Elsevier BV | Urology
Ricardo Miyaoka, Omar Ortiz-Alvarado, Carly Kriedberg, Shaheen Alanee, Ekkarin Chotikawanich, Manoj Monga,
Prevalence of kidney stone disease is increasing worldwide, and several factors may be involved. We aimed to establish a correlation between stress and kidney stones.We prospectively evaluated 200 patients with a diagnosis of kidney stone disease having them self-respond to a validated questionnaire to measure stress (Perceived Stress Scale-10 [PSS-10]). Stone-related characteristics and potential stressing factors were assessed. Variables that were significant on the univariate analysis were used ...
Tópico(s): Muscle and Compartmental Disorders
2011 - Mary Ann Liebert, Inc. | Journal of Endourology
Omar Ortiz-Alvarado, Ricardo Miyaoka, Carly Kriedberg, Angela Moeding, Michelle Stessman, Manoj Monga,
Objectives To examine the effects of dietary manipulation and pyridoxine medical management for idiopathic hyperoxaluria in patients with nephrolithiasis. Methods A retrospective longitudinal study of the patients treated in our stone clinics from July 2007 to February 2009 was performed. All patients were evaluated with pre- and postintervention 24-hour urine collection and met a registered dietician. Recommendations to keep urine volume above 2 L per day, sodium restriction, protein moderation, ...
Tópico(s): Paleopathology and ancient diseases
2011 - Elsevier BV | Urology
Omar Ortiz-Alvarado, Ricardo Miyaoka, Carly Kriedberg, Angela Moeding, Michelle Stessman, J. Kyle Anderson, Manoj Monga,
The aim of this study was to investigate the current impact of dietary counseling on the risk for urolithiasis.A retrospective cohort study of the patients treated in our stone clinics from July 2007 to February 2009 was carried out. Patients' urinary risk factors for stone disease were evaluated with pre- and postintervention 24-hour urine collections. All patients received dietary recommendations from a registered dietician at each visit.One hundred thirty-seven subjects were identified and managed ...
Tópico(s): Pediatric Urology and Nephrology Studies
2011 - Mary Ann Liebert, Inc. | Journal of Endourology
Omar Ortiz‐Avila, Carlos Alberto Sámano-García, Elizabeth Calderón‐Cortés, Ismael H. Pérez-Hernández, Ricardo Mejía‐Zepeda, Alain R. Rodríguez-Orozco, Alfredo Saavedra‐Molina, Christian Cortés‐Rojo,
Tópico(s): Natural Antidiabetic Agents Studies
2013 - Springer Science+Business Media | Journal of Bioenergetics and Biomembranes
Omar Ortiz‐Avila, Marco Alonso Gallegos‐Corona, Luis A. Sánchez‐Briones, Elizabeth Calderón‐Cortés, Rocío Montoya‐Pérez, Alain R. Rodríguez-Orozco, Jesús Campos‐García, Alfredo Saavedra‐Molina, Ricardo Mejía‐Zepeda, Christian Cortés‐Rojo,
Tópico(s): Peroxisome Proliferator-Activated Receptors
2015 - Springer Science+Business Media | Journal of Bioenergetics and Biomembranes
Omar Ortiz‐Avila, Mauricio Esquivel-Martínez, Berenice Eridani Olmos‐Orizaba, Alfredo Saavedra‐Molina, Alain R. Rodríguez-Orozco, Christian Cortés‐Rojo,
Diabetic encephalopathy is a diabetic complication related to the metabolic alterations featuring diabetes. Diabetes is characterized by increased lipid peroxidation, altered glutathione redox status, exacerbated levels of ROS, and mitochondrial dysfunction. Although the pathophysiology of diabetic encephalopathy remains to be clarified, oxidative stress and mitochondrial dysfunction play a crucial role in the pathogenesis of chronic diabetic complications. Taking this into consideration, the aim ...
Tópico(s): Phytochemicals and Antioxidant Activities
2015 - Hindawi Publishing Corporation | Journal of Diabetes Research
M. J. Castro-Alonso, Carlos E. Ortíz, Sixto Omar Garcia Perez, Rajeswari Narayanasamy, G. Fajardo-San-Miguel, H. Herrera‐Hernandez, Nagamani Balagurusamy,
Tópico(s): Concrete and Cement Materials Research
2017 - Springer Science+Business Media | Environmental Science and Pollution Research
Omar Ortiz‐Avila, María del Consuelo Figueroa–García, Claudia Isabel Garcia‐Berumen, Elizabeth Calderón‐Cortés, Jorge A. Mejía‐Barajas, Alain R. Rodríguez-Orozco, Ricardo Mejía‐Zepeda, Alfredo Saavedra‐Molina, Christian Cortés‐Rojo,
Tópico(s): Pharmacology and Obesity Treatment
2017 - Springer Science+Business Media | Journal of Bioenergetics and Biomembranes
Pedro Limón-Covarrubias, David Ávalos-Cueva, Gonzalo Valdés, Óscar Javier Reyes Ortiz, Rey Omar Adame Hernández, José Roberto Galaviz-González,
In most cases, stone mastic asphalt (SMA) mixtures placed in thin layers and subjected to stress develop early cracks (potentially resulting from being improperly affixed to the underlying layer, placed over previously cracked asphalt pavement, or placed over Portland cement concrete slabs). However, the filler used in SMA production is very influential on the performance of the mix. Fillers used in this type of mixture have a low plastic index or are inert (calcium carbonate or lime), so it is important ...
Tópico(s): Innovative concrete reinforcement materials
2019 - Multidisciplinary Digital Publishing Institute | Materials
Produção Nacional
Liliana Cuevas, Juan Carlos Ayala, Orlando Alberto Velásquez-Jiménez, Jorge Navarro-Alean, Luis Gabriel González-Higuera, Nayib Zurita Medrano, Juan David Hernández-Restrepo, Jorge Augusto Herrera Chaparro, Douglas Omar Ortiz Espinel, Zuluaga-Zuluaga Mauricio, Giovanni Bonilla Ardila,
Para emitir las recomendaciones específicas frente a la población de pacientes con cáncer, se tomaron en cuenta diversas observaciones en pacientes con patologías oncológicas en momentos de COVID-19, que muestran riesgo mayor de complicaciones en esta población, así como las recomendaciones publicadas por las siguientes instituciones y asociaciones: National Comprehensive Cancer Network (NCCN), American College of Surgeons (ACS), American Society of Clinical Oncology (ASCO), European Society of Surgical ...
Tópico(s): Surgical site infection prevention
2020 - | Revista Colombiana de Cirugía
Pedro La Hera, Daniel Ortíz Morales, Omar Mendoza‐Trejo,
Dynamic motion primitives (DMPs) is a motion planning method based on the concept of teaching a robot how to move based on human demonstration. To this end, DMPs use a machine learning framework that tunes stable non-linear differential equations according to data sets from demonstrated motions. Consequently, the numerical solution of these differential equations represent the desired motions. The purpose of this article is to present the steps to apply the DMPs framework and analyse its application ...
Tópico(s): Manufacturing Process and Optimization
2021 - Elsevier BV | Computers and Electronics in Agriculture
Claudia Isabel Garcia‐Berumen, Manuel Alejandro Vargas-Vargas, Omar Ortiz‐Avila, Rosa María Piña–Zentella, Minerva Ramos‐Gómez, María del Consuelo Figueroa–García, Ricardo Mejía‐Zepeda, Alain R. Rodríguez-Orozco, Alfredo Saavedra‐Molina, Christian Cortés‐Rojo,
Non-alcoholic fatty liver disease (NAFLD) is characterized by lipid accumulation in hepatocytes, and in advanced stages, by inflammation and fibrosis. Excessive ROS production due to mitochondrial dysfunction contributes to NAFLD development, making the decrease in mitochondrial ROS production an emerging target to alleviate NAFLD. Previously, we have shown that avocado oil, a source of several bioactive compounds with antioxidant effects, decreases oxidative stress by improving the function of the ...
Tópico(s): Phytochemicals and Antioxidant Activities
2022 - Frontiers Media | Frontiers in Pharmacology
Cristian Adrián Márquez‐Ramírez, José Lucio Hernández de la Paz, Omar Ortiz‐Avila, Andres Raya‐‐Farias, Juan Carlos González‐Hernández, Alain R. Rodríguez-Orozco, Rafael Salgado‐Garciglia, Alfredo Saavedra‐Molina, Daniel Godínez‐Hernández, Christian Cortés‐Rojo,
Tópico(s): Antioxidant Activity and Oxidative Stress
2018 - Elsevier BV | Nutrition
Claudia Isabel Garcia‐Berumen, Omar Ortiz‐Avila, Manuel Alejandro Vargas-Vargas, Bricia A. del Rosario-Tamayo, Clotilde Guajardo-López, Alfredo Saavedra‐Molina, Alain R. Rodríguez-Orozco, Christian Cortés‐Rojo,
High fat or fructose induces non-alcoholic fatty liver disease (NAFLD) accompanied of mitochondrial dysfunction and oxidative stress. Controversy remains about whether fructose or fat is more deleterious for NAFLD development. To get more insights about this issue and to determine if the severity of liver disease induced by fructose or fat is related to degree of mitochondrial dysfunction, we compared the effects of diets containing high fat (HF), fructose (Fr) or high fat plus fructose (HF + Fr) on NAFLD ...
Tópico(s): Alcohol Consumption and Health Effects
2019 - BioMed Central | Lipids in Health and Disease
Keegan Kang, Sergey Kushnarev, Wong Wei Pin, Omar Ortiz, Jacob Chen Shihang,
Multivariable calculus is one of the core subjects which engineering students study at university. Students may end up memorizing formulae in multivariable calculus due to the lack of ability in visualizing 3D surfaces, and hence not gain much intuition for the subject. We developed an in-house virtual reality (VR) application with the intention for students to visualize concepts in Multivariable Calculus. In order to evaluate the effectiveness of the VR application (which we term as the treatment), ...
Tópico(s): Virtual Reality Applications and Impacts
2020 - Institute of Electrical and Electronics Engineers | IEEE Access
Rafael Ortíz‐Alvarado, Omar Guzmán‐Quevedo, Rosalío Mercado-Camargo, Thomas Haertlé, Caroline Vignes, Francisco Bolaños‐Jiménez,
Gustatory papillae and associated taste buds receive and process chemical information from the environment. In mammals, their development takes place during the late phase of embryogenesis. However, the cellular factors that regulate the differentiation of taste papillae remain largely unknown. Here, we show by quantitative real time RT‐PCR that both isoforms of tryptophan hydroxylase (TPH1 and TPH2), the first and rate limiting enzyme of serotonin (5‐HT) synthesis, are expressed in developing circumvallate ...
Tópico(s): Regulation of Appetite and Obesity
2006 - Wiley | FEBS Letters
Manuel Feria‐Ortiz, Uri Omar García‐Vázquez,
We describe a new species of lizard of the genus Plestiodon from the Sierra Madre del Sur of Guerrero, Mexico. Plestiodonnietoi sp. nov. shares a characteristic with all members of the P. brevirostris group in that the scale that medially bordersthe postgenial is wider than long. This species is most similar to P. brevirostris and P. indubitus from which it differs byhaving the following combination of characters: large adult size, interparietal enclosed posteriorly by parietals, and a pale lateral ...
Tópico(s): Plant and animal studies
2012 - Q15088586 | Zootaxa
Giovanni Scala Marchini, Omar Ortiz-Alvarado, Ricardo Miyaoka, Carly Kriedberg, Angela Moeding, Michelle Stessman, Manoj Monga,
Objective To elucidate the effect of a patient-centered combined nutritional and medical therapy approach on stone disease management, guided by 24-hour urinary stone risk. Materials and Methods We retrospectively analyzed the records of patients treated at our multidisciplinary stone clinic from July 2007 to February 2009. Included were adult stone formers who presented with severe urinary abnormalities or whose urinary parameters failed to improve with dietary changes. Urinary risk factors for ...
Tópico(s): Renal function and acid-base balance
2013 - Elsevier BV | Urology