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Jorge zambrano

Carolina Díaz-Cárdenas, Angela Cantillo, Laura Yinneth Rojas, Tito Sandoval, Susana Fiorentino, Jorge Robles, Freddy A Ramos, María Mercedes Zambrano, Sandra Baena
In order to select halophilic microorganisms as a source of compounds with cytotoxic activities, a total of 135 bacterial strains were isolated from water and sediment samples collected from the Zipaquirá salt mine in the Colombian Andes. We determined the cytotoxic effects of 100 crude extracts from 54 selected organisms on the adherent murine mammary cell carcinoma 4T1 and human mammary adenocarcinoma MCF-7 cell lines. These extracts were obtained from strains of Isoptericola, Ornithinimicrobium, Janibacter, Nesterenkonia, Alkalibacterium, Bacillus, Halomonas, Chromohalobacter, Shewanella, Salipiger, Martellela, Oceanibaculum, Caenispirillum and Labrenzia...
December 22, 2017: AMB Express
Jorge Luis Zambrano-Martinez, Carlos T Calafate, David Soler, Juan-Carlos Cano
Traffic congestion is an important problem faced by Intelligent Transportation Systems (ITS), requiring models that allow predicting the impact of different solutions on urban traffic flow. Such an approach typically requires the use of simulations, which should be as realistic as possible. However, achieving high degrees of realism can be complex when the actual traffic patterns, defined through an Origin/Destination (O-D) matrix for the vehicles in a city, remain unknown. Thus, the main contribution of this paper is a heuristic for improving traffic congestion modeling...
December 15, 2017: Sensors
Nancy Gisela González Garza, Janice Azucena Chuc Koyoc, Jorge Ariel Torres Castillo, Eduardo Alejandro García Zambrano, David Betancur Ancona, Luis Chel Guerrero, Sugey Ramona Sinagawa García
Moringa oleifera (Moringaceae) is a specie of significant importance because of its multiple nutraceutical properties, that has led to increase in its consumption. The seeds contain a high percentage of protein (37.48%). However, little is known about the bioactive properties of these proteins and peptides, especially those generated by enzymatic hydrolysis. The objective of this study was to evaluate the biofunctional properties of total hydrolysates (TH) and peptide fractions from protein isolates of moringa seeds...
December 2017: Journal of Food Science and Technology
Ulises Novoa, Diego Arauna, Marisol Moran, Madelaine Nuñez, Sebastián Zagmutt, Sergio Saldivia, Cristian Valdes, Jorge Villaseñor, Carmen Gloria Zambrano, Daniel R Gonzalez
Diabetic cardiomyopathy refers to the manifestations in the heart as a result of altered glucose homeostasis, reflected as fibrosis, cellular hypertrophy, increased oxidative stress, and apoptosis, leading to ventricular dysfunction. Since physical exercise has been indicated as cardioprotective, we tested the hypothesis that high-intensity exercise training could reverse the cardiac maladaptations produced by diabetes. For this, diabetes was induced in rats by a single dose of alloxan. Diabetic rats were randomly assigned to a sedentary group or submitted to a program of exercise on a treadmill for 4 weeks at 80% of maximal performance...
2017: Oxidative Medicine and Cellular Longevity
Paloma López-Montemayor, Jorge E Valdez-García, Denise Loya-García, Julio C Hernandez-Camarena
PURPOSE: Report on the safety, efficiency and refractive outcomes of LASIK surgery in patients aged 65 or older. METHODS: This study includes a case series of patients ≥65 years that underwent corneal refractive surgery during the period June 2010 to June 2015 at Hospital Zambrano Hellion, Monterrey, Mexico. Inclusion criteria were normal topography, central corneal thickness >500 μm, preoperative manifest refraction spherical equivalent (MRSE) up to -8...
June 23, 2017: International Ophthalmology
Victor J Del Brutto, Jorge G Ortiz, Oscar H Del Brutto, Robertino M Mera, Mauricio Zambrano, José Biller
OBJECTIVE: Cerebral small vessel disease (SVD) is inversely associated with cognitive performance. However, whether the total SVD score is a better predictor of poor cognitive performance than individual signatures of SVD is inconclusive. We aimed to estimate the combined and independent predictive power of these MRI findings. METHODS: Atahualpa residents aged ≥60 years underwent brain MRI. Cognitive performance was measured by the Montreal Cognitive Assessment (MoCA)...
May 26, 2017: International Journal of Geriatric Psychiatry
Juan Carlos Bastidas, Jorge Julián Vélez, Jeannette Zambrano, Adela Londoño
Design and redesign of water quality monitoring networks were evaluated for two similarly sized watersheds in the tropical Andes via optimization techniques using geographic information system technology (GIS) and a matter-element analysis of 5-day biological oxygen demand (BOD5) and total suspended solids (TSS). This resulted in a flexible, objectively based design for a 1128-km(2) watershed without prior water quality data (La Miel River), and a network redesign of a 1052-km(2) watershed with historical water quality monitoring (Chinchiná River)...
September 2017: Environmental Science and Pollution Research International
Jorge A Sanhueza, Tomás Zambrano, Carlos Bahamondes-Avila, Luis A Salazar
Different factors affecting athletic performance are well established: intensity and type of training, anthropometric characteristics as well as an important psychological component. However, the contribution of the genetic background has been less investigated. The aim of the present study was to investigate the influence of polymorphisms within genes associated with stress and anxiety (5HTT, CRH2R, ACE, NK1R, 5HT1AR and CRF-BP) on the physical capability and sports performance in triathletes. One hundred and ninety two (192) unrelated Chilean triathletes who participated in the 2014 70...
December 2016: Journal of Sports Science & Medicine
Jorge Andrés Carvajal, María José Zambrano, Nur Mónica Theodor, Luis Emilio Moreno, Thiare Rosario Olguín, Paula Sofía Vanhauwaert, Nevenka Belén Rojas, Ana María Delpiano
Many pharmacological agents have been investigated to manage preterm labor; we postulate that a combination of tocolytic drugs may achieve a better effect in the prevention of uterine contractions without dose-dependent adverse effects. The aim of this study was to evaluate the inhibitory effect of dual combinations of tocolytics in vitro. Human myometrium was obtained during elective cesarean sections (term without labor; n = 40). Myometrial strips were placed in organ baths for the measurement of isometric tension...
April 2017: Reproductive Sciences
Robin L Chazdon, Eben N Broadbent, Danaë M A Rozendaal, Frans Bongers, Angélica María Almeyda Zambrano, T Mitchell Aide, Patricia Balvanera, Justin M Becknell, Vanessa Boukili, Pedro H S Brancalion, Dylan Craven, Jarcilene S Almeida-Cortez, George A L Cabral, Ben de Jong, Julie S Denslow, Daisy H Dent, Saara J DeWalt, Juan M Dupuy, Sandra M Durán, Mario M Espírito-Santo, María C Fandino, Ricardo G César, Jefferson S Hall, José Luis Hernández-Stefanoni, Catarina C Jakovac, André B Junqueira, Deborah Kennard, Susan G Letcher, Madelon Lohbeck, Miguel Martínez-Ramos, Paulo Massoca, Jorge A Meave, Rita Mesquita, Francisco Mora, Rodrigo Muñoz, Robert Muscarella, Yule R F Nunes, Susana Ochoa-Gaona, Edith Orihuela-Belmonte, Marielos Peña-Claros, Eduardo A Pérez-García, Daniel Piotto, Jennifer S Powers, Jorge Rodríguez-Velazquez, Isabel Eunice Romero-Pérez, Jorge Ruíz, Juan G Saldarriaga, Arturo Sanchez-Azofeifa, Naomi B Schwartz, Marc K Steininger, Nathan G Swenson, Maria Uriarte, Michiel van Breugel, Hans van der Wal, Maria D M Veloso, Hans Vester, Ima Celia G Vieira, Tony Vizcarra Bentos, G Bruce Williamson, Lourens Poorter
Regrowth of tropical secondary forests following complete or nearly complete removal of forest vegetation actively stores carbon in aboveground biomass, partially counterbalancing carbon emissions from deforestation, forest degradation, burning of fossil fuels, and other anthropogenic sources. We estimate the age and spatial extent of lowland second-growth forests in the Latin American tropics and model their potential aboveground carbon accumulation over four decades. Our model shows that, in 2008, second-growth forests (1 to 60 years old) covered 2...
May 2016: Science Advances
Oscar Martínez-Santiago, Yovani Marrero-Ponce, Stephen J Barigye, Huong Le Thi Thu, F Javier Torres, Cesar H Zambrano, Jorge L Muñiz Olite, Maykel Cruz-Monteagudo, Ricardo Vivas-Reyes, Liliana Vázquez Infante, Luis M Artiles Martínez
This report examines the interpretation of the Graph Derivative Indices (GDIs) from three different perspectives (i.e., in structural, steric and electronic terms). It is found that the individual vertex frequencies may be expressed in terms of the geometrical and electronic reactivity of the atoms and bonds, respectively. On the other hand, it is demonstrated that the GDIs are sensitive to progressive structural modifications in terms of: size, ramifications, electronic richness, conjugation effects and molecular symmetry...
May 27, 2016: International Journal of Molecular Sciences
Martha L Chadid, Jorge Carpio, Pedro Valdivieso, Milton Zambrano, Javier García-Ferreyra, Pedro Valdivieso-Mejía
OBJECTIVE: Establish the number of metaphase II oocytes that are needed for optimum blastulation rate and to achieve a better rate of gestation. METHODS: Retrospective study. Women diagnosed with infertility. There were 110 women submitted to IVF/ICSI, excluding third day transfers and those with canceled cycles. After controlled ovarian stimulation, cultivation continued to blastocysts. RESULTS: Average age of the patients: 33.41. IVF technique: 73 patients, 66...
2015: JBRA Assisted Reproduction
Jorge Jesús Veloz, Nicolás Saavedra, Marysol Alvear, Tomás Zambrano, Leticia Barrientos, Luis A Salazar
Tooth decay is an infectious disease, whose main causative agent identified is Streptococcus mutans (S. mutans). Diverse treatments have been used to eradicate this microorganism, including propolis. To date, it has been shown that polyphenols from Chilean propolis inhibit S. mutans growth and biofilm formation. However, the molecular mechanisms underlying this process are unclear. In the present study, we assessed the effect of Chilean propolis on the expression and activity of the glycosyltransferases enzymes and their related genes...
2016: BioMed Research International
Lourens Poorter, Frans Bongers, T Mitchell Aide, Angélica M Almeyda Zambrano, Patricia Balvanera, Justin M Becknell, Vanessa Boukili, Pedro H S Brancalion, Eben N Broadbent, Robin L Chazdon, Dylan Craven, Jarcilene S de Almeida-Cortez, George A L Cabral, Ben H J de Jong, Julie S Denslow, Daisy H Dent, Saara J DeWalt, Juan M Dupuy, Sandra M Durán, Mario M Espírito-Santo, María C Fandino, Ricardo G César, Jefferson S Hall, José Luis Hernandez-Stefanoni, Catarina C Jakovac, André B Junqueira, Deborah Kennard, Susan G Letcher, Juan-Carlos Licona, Madelon Lohbeck, Erika Marín-Spiotta, Miguel Martínez-Ramos, Paulo Massoca, Jorge A Meave, Rita Mesquita, Francisco Mora, Rodrigo Muñoz, Robert Muscarella, Yule R F Nunes, Susana Ochoa-Gaona, Alexandre A de Oliveira, Edith Orihuela-Belmonte, Marielos Peña-Claros, Eduardo A Pérez-García, Daniel Piotto, Jennifer S Powers, Jorge Rodríguez-Velázquez, I Eunice Romero-Pérez, Jorge Ruíz, Juan G Saldarriaga, Arturo Sanchez-Azofeifa, Naomi B Schwartz, Marc K Steininger, Nathan G Swenson, Marisol Toledo, Maria Uriarte, Michiel van Breugel, Hans van der Wal, Maria D M Veloso, Hans F M Vester, Alberto Vicentini, Ima C G Vieira, Tony Vizcarra Bentos, G Bruce Williamson, Danaë M A Rozendaal
Land-use change occurs nowhere more rapidly than in the tropics, where the imbalance between deforestation and forest regrowth has large consequences for the global carbon cycle. However, considerable uncertainty remains about the rate of biomass recovery in secondary forests, and how these rates are influenced by climate, landscape, and prior land use. Here we analyse aboveground biomass recovery during secondary succession in 45 forest sites and about 1,500 forest plots covering the major environmental gradients in the Neotropics...
February 11, 2016: Nature
Francisco Gerardo Yanowsky-Escatell, Leonardo Pazarín-Villaseñor, Jorge Andrade-Sierra, Miguel Angel Zambrano-Velarde, Francisco Martin Preciado-Figueroa, Christian Jesús Santana-Arciniega, Rogelio Ignacio Galeno-Sánchez
INTRODUCTION: serum albumin the biomarker most frequently used as one of three biochemical criteria for diagnosis of protein energy wasting (PEW). However, as a nutritional parameter it's unreliable in chronic kidney disease (CKD). The subjective global assessment (SGA) has been recommended for nutritional evaluation and the PEW in CKD. OBJECTIVE: determine association between the levels of serum albumin and SGA in patients with end stage renal disease (ESRD) who started peritoneal dialysis (PD)...
December 1, 2015: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
Oscar H Del Brutto, Robertino M Mera, Jorge Macias, Gabriela Morales, Mauricio Zambrano
All studies attempting to find an association between vitamin D deficiency and cerebrovascular diseases have been conducted at latitudes far away from the Equator, where living conditions, cardiovascular risk factors, and sunshine exposure are different from tropical regions. We aimed to assess cerebrovascular correlates of vitamin D deficiency in community-dwelling older adults living in Atahualpa, a village located in rural coastal Ecuador. Out of 267 individuals enrolled in the neuroimaging substudy of the Atahualpa Project, 220 (82%) signed the informed consent...
December 2015: International Journal of Stroke: Official Journal of the International Stroke Society
Laura Rodríguez-Osorio, Diana Pazmiño Zambrano, Carolina Gracia-Iguacel, Jorge Rojas-Rivera, Alberto Ortiz, Jesus Egido, Emilio González Parra
Sevelamer is a non-calcium phosphate binder used in advanced chronic kidney disease (CKD) and in dialysis for hyperphosphataemia control. Several experimental, observational studies and clinical trials have shown that sevelamer has pleiotropic effects, beyond hyperphosphataemia control, including actions on inflammation, oxidative stress, lipid profile and atherogenesis, vascular calcification, endothelial dysfunction and the reduction of several uremic toxins. This is the biological basis for its global effect on cardiovascular morbidity and mortality in patients with chronic kidney disease...
2015: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
Luis Leyton, Melissa Hott, Francisca Acuña, Jorge Caroca, Magdalena Nuñez, Carolina Martin, Angara Zambrano, Margarita I Concha, Carola Otth
Herpes simplex virus type-1 (HSV-1) is ubiquitous and is able to establish a lifelong persistent latent infection in neurons of infected individuals. It has been estimated that in approximately 70% of the population over 50 years old, the virus enters the brain and infects neurons, and possibly undergoes recurrent reactivation episodes during lifetime, especially in immunodepressed individuals. We previously showed that the sensors AMP-dependent kinase (AMPK) and Sirtuin 1 (Sirt1), involved in survival pathways and neuroprotection, were affected during the course of HSV-1 infection...
July 2, 2015: Virus Research
Jorge E Valdez-García, Julio C Hernandez-Camarena, Rosa Martínez-Muñoz
The purpose of this study was to evaluate the correlation of important risk factors for LASIK retreatment and the retreatment rate. A retrospective cohort study was conducted. Records of patients who underwent LASIK between January 2011 and January 2012 at the Zambrano-Hellion Medical Center, Tec de Monterrey (México), and posteriorly underwent LASIK retreatment were identified and risk factors to receive retreatment were assessed using relative risk. Main outcomes were retreatment rate, risk factors for retreatment, and uncorrected distance visual acuity (UDVA)...
February 2016: International Ophthalmology
Yadira Díaz-Aguila, Francisco Castelán, Estela Cuevas, Elena Zambrano, Margarita Martínez-Gómez, Alvaro Muñoz, Jorge Rodríguez-Antolín, Leticia Nicolás-Toledo
Consumption of sugar-sweetened beverages promotes the development of metabolic syndrome (MetS) and type 2 diabetes mellitus in humans. One factor related to the appearance of MetS components is the dysfunction of the adrenal gland. In fact, the experimental generation of hyperglycemia has been associated with morphological and microvascular changes in the adrenal glands of rats. We hypothesized that high sucrose consumption from infancy promotes histological disruption of the adrenal glands associated with the appearance of metabolic syndrome indicators...
March 2016: Anatomical Science International
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