Simón Octavio Valdéz‐Juárez, Anna Drake, Kevin J. Kardynal, Keith A. Hobson, Elizabeth Krebs, David J. Green,
Sex, age, body size, and breeding origin can influence the nonbreeding distribution of long-distance migratory birds. At continental scales, differential migration can lead to segregation of various classes or populations among different regions. At local scales, class segregation can occur among habitats of differing qualities, often due to dominance interactions related to sex, age, and body size. Conversion of natural habitats to agriculture in the Neotropics is leading to more birds wintering ...
Tópico(s): Animal Behavior and Reproduction
2018 - Oxford University Press | Ornithological Applications
Melissa García-Carrasco, Octavio Valdez-Baro, Luis Ángel Cabanillas-Bojórquez, Manuel de Jesús Bernal-Millán, M. Magdalena Rivera-Salas, Erick P. Gutiérrez‐Grijalva, J. Basilio Heredia,
Chitosan is a non-toxic, biodegradable, and biocompatible natural biopolymer widely used as a nanocarrier, emulsifier, flocculant, and antimicrobial agent with potential applications in industry. Recently, chitosan has been used as an encapsulating agent for bioactive plant compounds and agrochemicals by different technologies, such as spray-drying and nanoemulsions, to enhance antimicrobial activity. Chitosan nanocomposites have been shown to increase potential biocidal, antibacterial, and antifungal ...
Tópico(s): Postharvest Quality and Shelf Life Management
2023 - Multidisciplinary Digital Publishing Institute | Macromol—A Journal of Macromolecular Research
Sergio Medina‐Godoy, Silvia K. Rodríguez-Yáñez, Norma A. Bobadilla, Rosalba Pérez‐Villalva, Rafael Valdez-Ortiz, Enrique Hong, Silvia Luna‐Suárez, Octavio Paredes‐López, Ángel Valdéz-Ortiz,
The acidic-subunit of 11S seed storage globulin of Amaranthus hypochondriacus was recently modified by the incorporation of antihypertensive biopeptides: four units of Val–Tyr dipeptides (VY) in tandem and one of Ile–Pro–Pro tripeptide (IPP), was named AMC3. The in vivo effect of AMC3 enzymatic hydrolysates (AEH) produced in Escherichia coli, was evaluated in spontaneously hypertensive rats (SHR) by once-oral administration experiments. As positive control a SHR group received a dose of captopril (50 ...
Tópico(s): Biochemical effects in animals
2013 - Elsevier BV | Journal of Functional Foods
Juan Carlos Burillo Montúfar, Manuel Reyes Cortés, Ignacio Alfonso Reyes Cortés, Ma. Socorro Espino Valdez, Octavio Raúl Hinojosa de la Garza, Diana Pamela Nevárez Ronquillo, Eduardo Herrera Peraza, Marusia Rentería-Villalobos, M. E. Montero‐Cabrera,
In the U deposit area at San Marcos in Chihuahua, Mexico, hydrogeological and climatic conditions are very similar to the Nopal I, Peña Blanca U deposit, 50 km away. The physicochemical parameters and activity concentrations of several 238U-series isotopes have been determined in surface, vadose and ground waters at San Marcos. The application of some published models to activity ratios of these isotopes has allowed assessing the order of magnitude of transport parameters in the area. Resulting ...
Tópico(s): Groundwater and Isotope Geochemistry
2012 - Elsevier BV | Applied Geochemistry
Ana Gabriela Morachis‐Valdez, Octavio Dublán‐García, Leticia X. López‐Martínez, Marcela Galár-Martínez, Karinne Saucedo-Vence, Leobardo Manuel Gómez‐Oliván,
Tópico(s): Pharmacological Effects and Assays
2015 - Springer Science+Business Media | Environmental Science and Pollution Research
Laura Gabriela Espinosa‐Alonso, Octavio Paredes‐López, Maribel Valdez‐Morales, B. Dave Oomah,
Mexico is a major avocado producer and exporter, mainly the Hass variety, while the Mexican creole genotypes remain unexplored. We investigated the physicochemical characteristics, phenolics, and bioactivity of oils from six different Mexican avocado genotypes to increase their consumption and utilization. Oil content varied significantly among Mexican genotypes and increased linearly with dry matter content. Oils from Mexican creole genotypes varied significantly in UV absorbance and generally ...
Tópico(s): Postharvest Quality and Shelf Life Management
2017 - Wiley | European Journal of Lipid Science and Technology
Octavio García‐Depraect, Idania Valdez‐Vazquez, Eldon R. Rene, Jacob Gómez-Romero, Alberto López‐López, Elizabeth León‐Becerril,
The aim of this work was to study the metabolic and microbial community dynamics during dark co-fermentation of 80% tequila vinasse and 20% nixtamalization wastewater (w/w). Batch co-fermentations were performed in a 3-L well-mixed reactor at 35 °C and pH 5.5. In correspondence to Illumina MiSeq sequencing and reactor monitoring, changes in metabolites and microbial communities were characterized by three main stages: (i) a first stage during which lactate and acetate producers dominated and consumed ...
Tópico(s): Microbial metabolism and enzyme function
2019 - Elsevier BV | Bioresource Technology
Simón Octavio Valdéz‐Juárez, Gustavo A. Londoño,
We provide the first detailed account of incubation and nesting behaviors of Carmiol's Tanagers (Chlorothraupis carmioli) based on 34 nests of the subspecies Chlorothraupis carmioli frenata found between 2008 and 2011 in Manu National Park at 400 and 1100 m above sea level. All nests were shallow cups with three layers. All nests had two white eggs with varying intensity of brown speckling. The parent spent 63.9 ± 11.6% (average ± SD) of the daylight period incubating and conducted 5.6 ± 2.3 (n = 73 days) ...
Tópico(s): Animal Behavior and Reproduction
2016 - Wilson Ornithological Society | The Wilson Journal of Ornithology
Simón Octavio Valdéz‐Juárez, Gustavo A. Londoño,
We report the first detailed account of the breeding biology of the Pectoral Sparrow (Arremon taciturnus). We found 15 dome nests, each containing two eggs in a spherical interior chamber. Eggs were variable in color, ranging from immaculate glossy white to white heavily spotted with brown. Incubation patterns were obtained for six nests for time spans that ranged from 1 to 15 days for a total of 28 days across nests. Incubation in all nests was solely by the female, spending an average of 57% (range = ...
Tópico(s): Animal Vocal Communication and Behavior
2011 - Wilson Ornithological Society | The Wilson Journal of Ornithology
Sonia Gabriela Ortiz‐Maciel, Alejandro Salinas‐Melgoza, Simón Octavio Valdéz‐Juárez, Leonel López-Toledo, Ernesto C. Enkerlin‐Hoeflich,
Stochastic and catastrophic events may strongly impact the dynamics of wild populations. Annual fluctuations in rainfall may affect parrot populations, but few studies address the impact of other stochastic or catastrophic events on their population dynamics. The Maroon‐fronted Parrot Rhynchopsitta terrisi is an endangered species that nests colonially in cavities and crevices in limestone cliffs. From 1995 to 2010, we quantified Parrot attendance at nesting colonies throughout its breeding range, ...
Tópico(s): Fire effects on ecosystems
2014 - Wiley | Ibis
Octavio C. Rosas-Rosas, Raúl Valdez, Louis C. Bender, David Daniel,
It is questionable whether food-habits studies of pumas conducted in the southwestern United States can be extrapolated to northwestern Mexico, because of differences in management, distribution, and abundance of wildlife. We determined food habits of pumas (Puma concolor) in the Sonoran Desert of northwestern Sonora, Mexico. Based on studies in the western United States, we hypothesized that desert mule deer (Odocoileus hemionus) were the major food source of pumas in Sonoran Desert habitats of Mexico. ...
Tópico(s): Ecology and biodiversity studies
2003 - Wiley | Wildlife Society Bulletin
Octavio C. Rosas-Rosas, Raúl Valdez,
The northernmost known breeding population of jaguars occurs in the municipality of Nácori Chico, Sonora, Mexico about 270 km from the United States-Mexico border and may be the source from which jaguars sighted in the United States dispersed. Since 1999 at least 11 jaguars (Panthera onca) had been illegally killed in the area due to predator control programs. We initiated a jaguar landowner-based conservation plan in 2004. The eight participating landowners agreed to suspend predator control programs ...
Tópico(s): Archaeology and Natural History
2010 - Wiley | Conservation Biology
Octavio Silva-García, Juan José Valdez-Alarcón, Víctor M. Baizabal‐Aguirre,
Innate immunity against pathogenic bacteria is critical to protect host cells from invasion and infection as well as to develop an appropriate adaptive immune response. During bacterial infection, different signaling transduction pathways control the expression of a wide range of genes that orchestrate a number of molecular and cellular events to eliminate the invading microorganisms and regulate inflammation. The inflammatory response must be tightly regulated because uncontrolled inflammation ...
Tópico(s): Neonatal Respiratory Health Research
2014 - Hindawi Publishing Corporation | Mediators of Inflammation
Octavio Silva-García, Juan José Valdez-Alarcón, Víctor M. Baizabal‐Aguirre,
The Wnt/b-catenin signaling pathway is crucial to regulate cell proliferation and polarity, cell determination, and tissue homeostasis. The activation of Wnt/b-catenin signaling is based on the interaction between Wnt glycoproteins and seven transmembrane receptors—Frizzled (Fzd). This binding promotes recruitment of the scaffolding protein Disheveled (Dvl), which results in the phosphorylation of the co-receptor LRP5/6. The resultant molecular complex Wnt-Fzd-LRP5/6-Dvl forms a structural region ...
Tópico(s): Wnt/β-catenin signaling in development and cancer
2019 - Frontiers Media | Frontiers in Immunology
Carlos L. Céspedes, Julio Alarcón, Maribel Valdez‐Morales, Octavio Paredes‐López,
3-Hydroxyindole was isolated from the EtOH extract of fruits of Aristotelia chilensis during analyses by HPLC/MS and GC/MS and identifi ed by its mass fragmentation pattern and spectrophotometric data. Additionally, this extract showed an interesting antioxidant activity in DPPH, crocin and TBARS assays. The presence of this type of compound in this fruit species permits us to explain its strong antioxidant activity and its important part in the biosynthetic pathway of phenolic and alkaloid compounds ...
Tópico(s): Phytochemicals and Antioxidant Activities
2009 - De Gruyter | Zeitschrift für Naturforschung C
Ana Edith Ayala-Rodríguez, Roberto Gutiérrez‐Dorado, Jorge Milán‐Carrillo, Saraid Mora‐Rochín, José A. López‐Valenzuela, Ángel Valdéz-Ortiz, Octavio Paredes‐López, Cuauhtémoc Reyes‐Moreno,
Nixtamalised flour from transgenic maize (genetically modified maize with the cDNA of amarantin) and its tortillas were evaluated for some technological and nutritional properties and compared to the commercial brand MASECA™. Nixtamalised transgenic maize flour (NTMF) showed higher protein content, total colour difference, pH, water solubility index, essential amino acids content and lower Hunter “L” value, water absorption index, resistant starch and retrograded resistant starch than MASECA™ flour. ...
Tópico(s): Agricultural and Food Sciences
2008 - Elsevier BV | Food Chemistry
Norma A. Valdez‐Cruz, Octavio T. Ramı́rez, Mauricio A. Trujillo‐Roldán,
In a recent review, we discussed the extensively used temperature-inducible expression system, based on the pL and/or pR phage lambda promoters that are finely regulated by the thermo-labile cI857 repressor. In this system, an increase in temperature induces the heterologous protein production and activates the heat shock response, as well as the stringent and SOS responses. The same responses are activated just by the overproduction of recombinant protein. All such responses result in a metabolic ...
Tópico(s): Bacterial Genetics and Biotechnology
2011 - Landes Bioscience | Bioengineered Bugs
Mariana Valdez Castillo, José Octavio Saucedo-Lucero, Sonia Arriaga,
Biological processes for waste treatment are the main source of bioaerosol emissions in urban environments; these air pollutants have detrimental effects on human health, and therefore the development of treatment processes for this kind of pollutants is of high priority. The present work focused on the implementation of photocatalytic systems based on Perlite-supported ZnO and TiO2 to inactivate fungal/bacterial emissions from a biofilter treating ethyl acetate vapors in a steady state process. ...
Tópico(s): Air Quality Monitoring and Forecasting
2019 - Elsevier BV | Chemical Engineering Journal
Simón Octavio Valdéz‐Juárez, Elizabeth Krebs, Anna Drake, David J. Green,
Migratory birds can spend 8 months of the year on their wintering grounds and the conversion of natural habitats to agriculture in Latin America has been implicated in population declines of several Neotropical migrants. Despite this, few studies have directly assessed the value of agricultural habitat for wintering migrants. We compared the condition and survival of Yellow Warblers ( Setophaga petechia ) occupying natural (riparian forest, scrub‐mangrove) and agricultural habitat (annually cropped sorghum, ...
Tópico(s): Bird parasitology and diseases
2019 - Society for Conservation Biology | Conservation Science and Practice
Octavio C. Rosas-Rosas, Louis C. Bender, Raúl Valdez,
Predation by jaguars (Panthera onca) and pumas (Puma concolor) is often a source of conflict with cattle ranching in northeastern Sonora, Mexico. Because jaguars are endangered in Mexico, such conflicts have biological, social, and economic consequences. We documented the extent of predation by jaguars and pumas on cattle in 1999–2004 in northeastern Sonora, where the northernmost breeding population of jaguars exists in North America. Jaguars and pumas killed only calves < 12 mo old, and calves constituted ...
Tópico(s): Ecology and biodiversity studies
2008 - Elsevier BV | Rangeland Ecology & Management
Oziel Dante Montañez‐Valdez, Enrique Octavio García Flores, Jose A. Martinez, Jaime Salinas-Chavira, Rolando Rojo Rubio, J. Jesús Germán Peralta Ortiz,
Se midio el efecto en la composicion quimica de la paja de trigo usada como sustrato en la produccion de Pleurotus pulmonarius. Las pajas de trigo, tanto tratadas con P. pulmonarius como no tratadas, fueron obtenidas de una empresa comercial. Para obtener muestras representativas para el analisis quimico se tomaron al azar diez bolsas de la paja usada como sustrato para cultivar el hongo. El grupo testigo consistio en las pajas esterilizadas sin tratamiento con P. pulmonarius. A todas las muestras ...
Tópico(s): Composting and Vermicomposting Techniques
2008 - Associação Interciencia | Interciencia
Cuauhtémoc Reyes‐Moreno, Ana Edith Ayala-Rodríguez, Jorge Milán‐Carrillo, Saraid Mora‐Rochín, José A. López‐Valenzuela, Ángel Valdéz-Ortiz, Octavio Paredes‐López, Roberto Gutiérrez‐Dorado,
The potential use of quality protein transgenic maize (genetically modified maize with the cDNA of amarantin) for preparation of flour and tortillas through an extrusion lime cooking process was investigated. Tortillas from extruded transgenic maize flour had similar physicochemical and sensory properties than those from the commercial brand MASECA™; however, the former had the highest (P < 0.05) protein content (12.91 vs 8.93%, db), essential amino acids content, calculated protein efficiency ratio ( ...
Tópico(s): Agricultural and Food Sciences
2013 - Elsevier BV | Journal of Cereal Science
Octavio Aburto‐Oropeza, Exequiel Ezcurra, Gustavo D. Danemann, V. Castañeta Valdez, Jason Murray, Enric Sala,
Mangroves are disappearing rapidly worldwide despite their well documented biodiversity and the ecosystem services they provide. Failure to link ecological processes and their societal benefits has favored highly destructive aquaculture and tourism developments that threaten mangroves and result in costly “externalities.” Specifically, the potentially irreparable damage to fisheries because of mangrove loss has been belittled and is greatly underestimated. Here, we show that, in the Gulf of California, ...
Tópico(s): Marine and fisheries research
2008 - National Academy of Sciences | Proceedings of the National Academy of Sciences
Spencer Chainey, Gastón Pezzuchi, Néstor Octavio Guerrero Rojas, José Luis Hernandez Ramirez, Joana Monteiro, Erwin Rosas Valdez,
Research on crime concentration at micro-places has had a very western-industrialised focus. In this paper we provide results on crime concentration for 42 cities in Latin America. The results suggest that crime is concentrated at higher levels in Latin American cities than in western-industrialised contexts. Reasons for this do not appear to be related to population size, average street length, numbers of crimes or crime rates. The results offer an indication of the crime reduction opportunities ...
Tópico(s): Crime, Deviance, and Social Control
2019 - BioMed Central | Crime Science
... American Studies University of Florida, Gainesville, FL, USA Octavio Valdez Lafarga W.P. Carey School of Business, Arizona ...
2016 - World Scientific | Frontiers of economics and globalisation
Saumel Pérez-Rodriguez, Octavio T. Ramı́rez, Mauricio A. Trujillo‐Roldán, Norma A. Valdez‐Cruz,
Chinese hamster ovary (CHO) cells are the workhorse for obtaining recombinant proteins. Proteomic studies of these cells intend to understand cell biology and obtain more productive and robust cell lines for therapeutic protein production in the pharmaceutical industry. Because of the great importance of precipitation methods for the processing of samples in proteomics, the acetone, methanol-chloroform (M/C), and trichloroacetic acid (TCA)-acetone protocols were compared for CHO cells in terms of protein ...
Tópico(s): Microbial Inactivation Methods
2020 - Elsevier BV | Electronic Journal of Biotechnology
Jesús Octavio Sígala-Valdez, Obed Yamil Ramirez-Ezquivel, Celina Lizeth Castañeda-Miranda, Harumi Moreno-García, Rocío García-Rocha, Ismailía L. Escalante-García, A. Del Rı́o-De Santiago,
Using the SILAR method Zinc sulfide coatings were deposited on glass slices. The physical properties and the chemical mechanism throughout the variation in concentration of tri-sodium citrate (TSC) as a chelating agent in the synthesis of thin films were investigated. Results shows that ZnS thin films exhibit an average transmittance of 16% in visible light spectra region and a zinc blende structure. The ZnS films synthesized using TSC as a complexing agent, present a smaller average particle size, ...
Tópico(s): Copper-based nanomaterials and applications
2023 - Elsevier BV | Heliyon
Luis Alfonso Jiménez‐Ortega, Pedro de Jesús Bastidas-Bastidas, Octavio Valdez-Baro, Manuel Alonzo Báez-Sañudo, J. Basilio Heredia,
The intensive production of horticultural crops generates large amounts of agricultural biomass (BA), which is burned in the openfield or deposited in landfills becoming an environmental problem, especially if they are contaminated by pesticide residues. Thestudy aimed to evaluate the presence of pesticides in the BA of bell pepper, jalapeño pepper, and poblano pepper, using aQuEChERS method coupled to LC/MS-MS and GC/MS/MS. An analysis of the maximum residue limits was carried out,contrasting different ...
Tópico(s): Insect and Pesticide Research
2023 - | e-CUCBA
Letícia Maria Cavole, Karin E. Limburg, Natalya D. Gallo, Anne Gro Vea Salvanes, Arturo Ramírez‐Valdez, Lisa A. Levin, Octavio Aburto Oropeza, A. T. Hertwig, Ming‐Chang Liu, K. D. McKeegan,
The deep-sea is rapidly losing oxygen, with profound implications for marine organisms. Within Eastern Boundary Upwelling Systems, such as the California and the Benguela Current Ecosystems, an important question is how the ongoing expansion, intensification and shoaling of Oxygen Minimum Zones (OMZs) will affect deep-sea fishes throughout their lifetimes. One of the first steps to filling this knowledge gap is through the development of tools and techniques to track fishes’ exposure to hypoxic (<45 ...
Tópico(s): Isotope Analysis in Ecology
2022 - Elsevier BV | Deep Sea Research Part I Oceanographic Research Papers
María de la Luz Galván-Ramírez, Virginia Valdez Alvarado, Gustavo Vargas Gutierrez, Octavio González, Carlos García Cosio, Marcos Vielma Sandoval,
With the emergence of the human immunodeficiency virus (HIV), in patients with acquired immunodeficiency syndrome (AIDS), Toxoplasma gondii has arisen as an important opportunist pathogenic agent, especially in the central nervous system, being the most common cause of intracerebral lesions. The incidence of Toxoplasma gondii in HIV-infected patients depends principally on the existence of latent Toxoplasma parasitosis in the population affected. Through the enzyme-linked immunosorbent assay (ELISA), ...
Tópico(s): Rabies epidemiology and control
1997 - Brazilian Society of Tropical Medicine | Revista da Sociedade Brasileira de Medicina Tropical