Raúl Andrés Molina Benavides, Rómulo Campos Gaona, Hugo Sánchez Guerrero, Leónidas Giraldo Patiño, Alberto Stanislao Atzori,
Colombian mountain Páramos are considered natural areas with a very important role for human life. Páramos provide, both in mountain and lowland areas, a multitude of ecosystem services which start from vegetation to soil sustainability. The sustainability of Páramos is however impaired by several anthropogenic activities, including agricultural and livestock practices. A system thinking approach was applied in this work to improve the systemic understanding of factors affecting sustainability and ...
Tópico(s): Environmental and Cultural Studies in Latin America and Beyond
2019 - Multidisciplinary Digital Publishing Institute | Systems
Raúl Andrés Molina Benavides, Hugo Sánchez Guerrero, Rómulo Campos Gaona, Alberto Stanislao Atzori, Juan David Morales,
The contribution of Colombia to global emissions of greenhouse gases (GHGs) is low (0.37%); from this percentage, 38% is attributed to agriculture. There are few studies on GHGs emissions at the regional level for agriculture. Therefore, the aim of this research is to estimate dynamically GHG and carbon footprint produced by cattle in the department of Valle del Cauca, Colombia. GHG estimates were established as follows: Tier II of IPCC methodology (2006), and population trends, which were simulated ...
Tópico(s): Environmental Impact and Sustainability
2017 - National University of Colombia | Acta Agronómica
Agustı́n Guerrero-Hernández, Víctor Hugo Sánchez-Vázquez, Ericka Martínez-Martínez, Lizeth Sandoval‐Vazquez, Norma C. Perez-Rosas, Rodrigo Lopez‐Farias, Adán Dagnino-Acosta,
The sarcoplasmic/endoplasmic reticulum (SR/ER) is the main intracellular calcium (Ca2+) pool in muscle and non-muscle eukaryotic cells, respectively. The reticulum accumulates Ca2+ against its electrochemical gradient by the action of sarco/endoplasmic reticulum calcium ATPases (SERCA pumps), and the capacity of this Ca2+ store is increased by the presence of Ca2+ binding proteins in the lumen of the reticulum. A diversity of physical and chemical signals, activate the main Ca2+ release channels, i. ...
Tópico(s): Neuroscience and Neural Engineering
2019 - Springer Nature | Advances in experimental medicine and biology
Roberto Gamboa-Alvarado, Francisco Daniel Hernández-Castillo, Eugenio Guerrero Rodríguez, Abiel Sánchez-Arizpe, Ricardo Hugo Lira-Saldívar,
Gamboa Alvarado, Roberto; Hernandez Castillo, Francisco Daniel; Guerrero Rodriguez, Eugenio; Sanchez Arizpe, Abiel; Lira Saldivar, Ricardo Hugo Inhibicion del crecimiento micelial de rhizoctonia solani kuhn y phytophthora infestans mont. (de bary) con extractos vegetales metanolicos de hojasen (flourensia cernua d. ...
Tópico(s): Plant Pathogens and Fungal Diseases
2003 - | Revista mexicana de fitopatología(en línea)/Revista mexicana de fitopatología
Raúl Andrés Molina Benavides, Hugo Sánchez Guerrero, Daniel Mateus,
The livestock activity is linked to processes with environmental repercussions. Methane (CH4) and nitrous oxide (N2O) are two important greenhouse gases (GHG) emitted into the atmosphere by livestock during the processes of enteric fermentation and excreta management, which contribute to global warming. The objective of this paper was to review the amount of GHG emitted (kg CO2e) per kg of product generated from the main ruminant species (sheep, goats, buffaloes and bovines) used in tropical areas, under ...
Tópico(s): Effects of Environmental Stressors on Livestock
2018 - Universidad Nacional Abierta y a Distancia | Revista de Investigación Agraria y Ambiental
Raúl Andrés Molina Benavides, Hugo Sánchez Guerrero, Alberto Stanislao Atzori,
Se reconoce que el ambiente térmico es uno de los factores ecológicos más importantes para determinar el crecimiento, el desarrollo y la productividad de animales domésticos con efectos directos e indirectos sobre su fisiología y comportamiento. A pesar de tener una adaptación específica e individual, es muy común que, dentro de las variaciones de temperatura estacionales o diurnas, los animales se enfrenten a situaciones fuera de su zona de confort térmico. Debido al estrés calórico, las vacas ...
Tópico(s): Meat and Animal Product Quality
2017 - National University of Colombia | Acta Agronómica
Enrique Contreras, D. Domínguez, Hugo Tiznado, J. Guerrero-Sánchez, Noboru Takeuchi, G. Alonso‐Núñez, O. Contreras, Mercedes Teresita Oropeza-Guzmán, J. M. Romo-Herrera,
Herein, a series of N-doped carbon nanotube (CNx) samples were obtained by modifying the synthesis temperature. Consequently, the proportion of graphitic nitrogen (Ngraph) in the samples was systematically increased as a function of temperature. This allowed evaluation of the role of the CNx graphitic nitrogen in the oxygen reduction reaction (ORR). A correlation between the Ngraph content and the ORR onset potential was observed, which shifted to more positive potentials with an increase in kinetic ...
Tópico(s): Advanced battery technologies research
2019 - Royal Society of Chemistry | Nanoscale
Raúl Andrés Molina Benavides, Hugo Sánchez Guerrero,
La complejidad de los sistemas agropecuarios dadas sus múltiples interacciones de elementos bióticos y abióticos, hace que estudios integrales sean importantes para un mejor entendimiento y actuación frente a éstos. Este trabajo tuvo como objetivo estudiar la sostenibilidad de 8 sistemas ganaderos alto andinos. Se encontró en promedio carga animal de 0,5 UGG, producción de leche de 4 kg/vaca/día, intervalos de partos de 450 días y producciones de forraje de 2,45 t MS/ha con 14% PC y 60% FDN. En ...
Tópico(s): Plant and soil sciences
2017 - Universidad Nacional Abierta y a Distancia | Revista de Investigación Agraria y Ambiental
Omar Vergara‐Fernández, Rabí Mejía-Ovalle, Noel Salgado‐Nesme, Nathalie Rodríguez-Dennen, Javier Pérez-Aguirre, Víctor Hugo Guerrero-Guerrero, Juan Carlos Sánchez-Robles, Miguel Ángel Valdovinos-Díaz,
Tópico(s): Congenital gastrointestinal and neural anomalies
2013 - Springer Science+Business Media | Surgery Today
F. Vergara-Ovalle, Fructuoso Ayala‐Guerrero, Carlos Rosas, Hugo Sánchez-Castillo,
The Novel Object Recognition task (NOR) is widely used to study vertebrates' memory. It has been proposed as an adequate model for studying memory in different taxonomic groups, allowing similar and comparable results. Although in cephalopods, several research reports could indicate that they recognize objects in their environment, it has not been tested as an experimental paradigm that allows studying different memory phases. This study shows that two-month-old and older Octopus maya subjects can ...
Tópico(s): Chemical synthesis and alkaloids
2023 - Springer Science+Business Media | Animal Cognition
Jorge Cruz‐Huerta, Manuel Carrillo-Morales, Ericka Santacruz‐Juárez, Irán F. Hernández‐Ahuactzi, Jaime Escalante, Carolina Godoy‐Alcántar, Jorge Guerrero‐Álvarez, Herbert Höpfl, Hugo Morales‐Rojas, Mario Sánchez,
The dimethyl-, di-n-butyl-, and diphenyltin(IV) dithiocarbamate (dtc) complexes [{R2Sn(L-dtc)}x] 1−7 (1, L = L1, R = Me; 2, L = L1, R = n-Bu; 3, L = L2, R = Me, x = ∞; 4, L = L2, R = n-Bu; 5, L = L3, R = Me, x = 2; 6, L = L3, R = n-Bu, x = 2; 7, L = L3, R = Ph, x = 2) have been prepared from a series of secondary amino acid (AA) homologues as starting materials: N-benzylglycine (α-AA derivative = L1), N-benzyl-3-aminopropionic acid (β-AA derivative = L2), and N-benzyl-4-aminobutyric acid (γ-AA derivative = L3). The resulting compounds have been characterized ...
Tópico(s): Metal complexes synthesis and properties
2008 - American Chemical Society | Inorganic Chemistry
Alejandro Leal‐Sàenz, Kristen M. Waring, Mitra Menon, Samuel A. Cushman, Andrew J. Eckert, Lluvia Flores‐Rentería, José Ciro Hernández‐Díaz, Carlos A. López‐Sánchez, José Hugo Martínez Guerrero, Christian Wehenkel,
The phenotype of trees is determined by the relationships and interactions among genetic and environmental influences. Understanding the patterns and processes that are responsible for phenotypic variation is facilitated by studying the relationships between phenotype and the environment among many individuals across broad ecological and climatic gradients. We used Pinus strobiformis, which has a wide latitudinal distribution, as a model species to: (a) estimate the relative importance of different ...
Tópico(s): Tree-ring climate responses
2020 - Frontiers Media | Frontiers in Plant Science
Cervantes-Arista Clara, Angélica Román‐Guerrero, Víctor Hugo Oidor-Chan, Fernando Díaz de León‐Sánchez, Álvarez-Ramírez Erika Lorena, Clara Pelayo‐Zaldívar, Sierra-Palacios Edgar del Carmen, José Alberto Mendoza‐Espinoza,
The tunillo (Stenocereus stellatus [Pfeiffer] Riccobono) is a relatively little known cactus fruit with a significant pharmacological potential. However, all currently known variants are identified visually mostly on the basis of pulp color. Differences in chemical composition and pharmacological properties also remain largely unknown. Support vector machine classifiers were applied to UV-Visible spectra of liquid samples to obtain the following, color-based categories of tunillo fruits: A1-white, ...
Tópico(s): Bee Products Chemical Analysis
2020 - Elsevier BV | Food Chemistry
Pamela Yajaira Reyes-Rodríguez, Carlos Alberto Ávila‐Orta, Marlene Andrade-Guel, Dora A. Cortés‐Hernández, Adán Herrera-Guerrero, Christian Javier, J. Sánchez, Víctor Hugo Ramos-Martínez, Janett A. Valdez-Garza, Gilberto Francisco Hurtado-López,
Chronic kidney disease (CKD) is an increasing problem worldwide, usually detected by an increase of uremic toxins in the human bloodstream. In this study, Zn1-xMgxFe2O4 nanoparticles were synthesized and characterized as possible candidates for the adsorption of uremic toxins, such as urea, creatinine, and uric acid. The synthesis of nanoparticles from magnetic oxides of Fe, Zn, and Mg (Zn1-xMgxFe2O4, x = 0.0, 0.25, 0.5, 0.75, and 1.0) was carried out by sol-gel method at a heat treatment temperature ...
Tópico(s): Multiferroics and related materials
2020 - Elsevier BV | Ceramics International
Raúl Andrés Molina Benavides, Fernando Silva Aguilar, Sandra Milena Perilla Duque, Hugo Sánchez Guerrero,
<p>La influencia del clima sobre el comportamiento de los animales ha sido demostrada desde hace muchos años. Variables climáticas como la temperatura (T, °C), humedad relativa (HR, %), radiación solar (Rs, W/m2) y velocidad del viento (Vv, m/s), por fuera de sus rangos normales, pueden desplazar a los rumiantes de su zona de confort, generando en estos impactos negativos sobre su comportamiento, productividad y reproducción. Con el fin de caracterizar el ambiente térmico de la actividad ganadera en ...
Tópico(s): Meat and Animal Product Quality
2016 - National University of Colombia | Acta Agronómica
Mieke Titulaer, Alicia Melgoza‐Castillo, Arvind O. Panjabi, Alejandro Sánchez‐Flores, José Hugo Martínez Guerrero, Alberto Macías‐Duarte, Jesús A. Fernández,
We analyzed the diet of Baird's Sparrow (Ammodramus bairdii) and Grasshopper Sparrow (A. savannarum) in three different sites and sampling periods across the Chihuahuan Desert in northern Mexico. DNA from seeds in regurgitated stomach contents was sequenced using NGS technology and identified with a barcoding approach using the P6 loop of the trnL intron as genetic marker. During each sampling period, we collected random soil samples to estimate seed availability in the soil seed bank. Due to the ...
Tópico(s): Species Distribution and Climate Change
2017 - Public Library of Science | PLoS ONE
Carlos Augusto Bustamante Hinojosa, Rómulo Campos Gaona, Hugo Sánchez Guerrero,
The goal for this applied research was to assess the production and composition of buffalo milk when Oil Palm kernel flour and Oil Palm kernel cake are supplemented to their diet. Thirty buffaloes from the grasslands of the Andes valleys in Colombia with 1 to 3 lactations and an average weight of 575 kg were selected for the experimental. The animals were randomly assigned to one of three experimental groups: (T1 Control Group) with no diet supplements, (T2) 1000 g·day-1 of oil palm kernel cake and ...
Tópico(s): Ruminant Nutrition and Digestive Physiology
2017 - National University of Colombia at Medellín | Revista Facultad Nacional de Agronomía Medellín
Raúl Andrés Molina Benavides, Rómulo Campos Gaona, Alberto Stanislao Atzori, Luisa Fernanda Sánchez, Hugo Sánchez Guerrero,
In Colombia, livestock farming has been developed in highlands areas, with influence on these ecosystems and their ecosystem services. Reason why, in 2017, the Colombian issued legal regulations (Decree Law 870), which establishes the payment for environmental services (PES) as a key instrument in the conservation of strategic areas to achieve comprehensive rural development. The objective of this study was to evaluate the response of two type of highlands livestock agroecosystems to the implementation ...
Tópico(s): Complex Systems and Decision Making
2023 - Elsevier BV | Ecological Modelling
José Luis Guerrero-Naranjo, Hugo Quiroz-Mercado, Gustavo Sánchez-Bermúdez, Fernando Schoonewolff, Samantha Salinas Longoria, Rafael Romero Vera, Weng Tao, Richard L. Beckman, Virgilio Morales-Cantón, Asociacion para Evitar la Ceguera en Mexico I.A.P.,
Tópico(s): Neurological Disorders and Treatments
2013 - Cadmus Press | Investigative Ophthalmology & Visual Science
Produção Nacional
Revisado por pares
Lúcia Oliveira, Gonzalo Hagerman, Monzonís Torres, Carlos Miguel Lumi, J. A. C. Siachoque, Javier Cabrera Reyes, Javier Pérez-Aguirre, Juan Carlos Sánchez-Robles, Víctor Hugo Guerrero-Guerrero, Sthela Maria Murad‐Regadas, Vicente Gerardi Filho, Guillermo Rosato, E. Vieira, L. Marzan, Doryane Maria dos Reis Lima, Eduardo Londoño-Schimmer, Steven D. Wexner,
Tópico(s): Colorectal Cancer Surgical Treatments
2019 - Springer Science+Business Media | Techniques in Coloproctology
Hugo Quiroz–Mercado, Ermilo Sánchez-Buenfil, José Luis Guerrero-Naranjo, Daniel Ochoa‐Contreras, Matilde Ruiz‐Cruz, George Marcellino, Donald J. D’Amico,
Tópico(s): Vascular Malformations Diagnosis and Treatment
2001 - Springer Science+Business Media | Graefe s Archive for Clinical and Experimental Ophthalmology
Raúl Molina Benavides, Mauricio Vélez, Sandra Perilla Duque, Rómulo Campos Gaona, Hugo Sánchez Guerrero,
The consequences of climate change on agriculture have generated concern among researchers and decision-makers, especially regarding the effects it will have on this sector. The phenomenon is expected to affect the productivity of livestock systems, even more so in grazing livestock, where cattle and pastures are directly impacted by climatic variables. This study evaluated the climatic influence on bulk tank milk production and quality in 38 tropical dairy farms, using Pearson's partial correlation ...
Tópico(s): Agriculture Sustainability and Environmental Impact
2022 - Taylor & Francis | Italian Journal of Animal Science
Agustı́n Guerrero-Hernández, Martin Leonardo Gallegos-Gomez, Víctor Hugo Sánchez-Vázquez, María Cristina López-Méndez,
Acidic Ca(2+) stores, particularly lysosomes, are newly discovered players in the well-orchestrated arena of Ca(2+) signaling and we are at the verge of understanding how lysosomes accumulate Ca(2+) and how they release it in response to different chemical, such as NAADP, and physical signals. Additionally, it is now clear that lysosomes play a key role in autophagy, a process that allows cells to recycle components or to eliminate damaged structures to ensure cellular well-being. Moreover, lysosomes ...
Tópico(s): Cellular transport and secretion
2014 - Elsevier BV | Cell Calcium
L. E. López-González, J. Guerrero-Sánchez, Hugo Tiznado,
Tópico(s): Catalytic Processes in Materials Science
2023 - Elsevier BV | Surfaces and Interfaces
L. E. López-González, R. Ponce‐Pérez, Noboru Takeuchi, Hugo Tiznado, J. Guerrero-Sánchez,
• Adsorption of sorbitan monoacetate (SMA) on Cu (1 1 1) resulted stable mainly through physisorption. • Adsorption of SMA over Cu 2 O (1 1 1) surface showed a tendency to form coordination bonds. • The adsorption energy in Cu 2 O-SMA system strongly depends on the molecule internal conformation. This work reports a detailed density functional theory study of the adsorption of sorbitan monoacetate (SMA) molecules -as a model of the head group of sorbitan-derived surfactants- on Cu (1 1 1) and Cu 2 O (1 1 1) surfaces. ...
Tópico(s): Surface Chemistry and Catalysis
2022 - Elsevier BV | Applied Surface Science
Estela Guerrero De León, Hugo Alexis Sánchez-Martínez, Juan Morán-Pinzón, Esther del Olmo, José Luis López‐Pérez,
A considerable number of natural products have been published in recent years with misassigned structure, even though they had been correctly elucidated in the past. The availability of databases containing revised structures can prevent the amplification of errors in structural elucidation. NAPROC-13, a dereplication tool based on the 13C chemical shift, has been used to search for substances that, possessing the same chemical shifts, have been described with different structures. The correct structure ...
Tópico(s): Metabolomics and Mass Spectrometry Studies
2023 - American Chemical Society | Journal of Natural Products
Rómulo Campos Gaona, Katherine García Alegría, Mauricio Velez Terranova, Erika Andrea Hernández, Raúl Molina Benavides, Hugo Sánchez Guerrero, Carlos Vicente Durán Castro, Leónidas Giraldo Patiño,
<p>La producción lechera ha sido una de las grandes áreas del desarrollo de la Zootecnia. En ella se reúne el mejoramiento genético, logros en la producción de leche, disposición de la ubre, velocidad de ordeño, variación en la composición química, rendimiento lácteo en subproductos; así mismo, el avance en la nutrición para atender los<br />requerimientos de los altos volúmenes de leche, evolución en los sistemas de producción, innovaciones tecnológicas en el ordeño, higienización y aseguramiento ...
Tópico(s): Agricultural and Food Production Studies
2015 - National University of Colombia | Acta Agronómica
Martín-Leonardo Gallegos-Gómez, Elisa Greotti, María-Cristina López-Méndez, Víctor-Hugo Sánchez-Vázquez, Juan Manuel Arias, Agustı́n Guerrero-Hernández,
The Golgi apparatus (GA) is a bona fide Ca2+ store; however, there is a lack of GA-specific Ca2+ mobilizing agents. Here, we report that emetine specifically releases Ca2+ from GA in HeLa and HL-1 atrial myocytes. Additionally, it has become evident that the trans-Golgi is a labile Ca2+ store that requires a continuous source of Ca2+ from either the external milieu or from the ER, to enable it to produce a detectable transient increase in cytosolic Ca2+. Our data indicates that the emetine-sensitive ...
Tópico(s): Signaling Pathways in Disease
2018 - Nature Portfolio | Scientific Reports
Nicolás Cervantes-Escorcia, Omar‐Jacobo Santos‐Sánchez, Liliam Rodríguez‐Guerrero, Hugo Romero, Alberto González-Facundo,
Tópico(s): Extremum Seeking Control Systems
2018 - Springer Science+Business Media | Arabian Journal for Science and Engineering
J. I. Páez-Ornelas, H. N. Fernández-Escamilla, H.A. Borbón-Núñez, Hugo Tiznado, Noboru Takeuchi, J. Guerrero-Sánchez,
Atomic description of ALD in systems that combine large surface area and high reactivity is key for selecting the right functional group to enhance the ligand-exchange reactions.
Tópico(s): Electrocatalysts for Energy Conversion
2021 - Royal Society of Chemistry | Physical Chemistry Chemical Physics