Autonomous University of QueretaroQueretaro

Poblado C-11 José María Morelos y Pavón, Mexico

Autonomous University of QueretaroQueretaro

Poblado C-11 José María Morelos y Pavón, Mexico
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Robles I.,CIDETEQ | Rodriguez-Valadez F.J.,CIDETEQ | Castano E.,Autonomous University of QueretaroQueretaro | Godinez L.A.,CIDETEQ
Sustainable Environment Research | Year: 2017

A two-stage photoelectro-Fenton reactor was built and employed to test its ability to remove colour using Orange II as a model dye compound. A set of four critical operational variables was defined for the reactor under study. In order to quantify their significance on colour removal, a 24 experimental factorial design was used. From the resultant data, and from a variable interaction analysis, a model of the reactor's performance as well as a characteristic set of experimental conditions was obtained. From this information, a triple interaction among current density, resin concentration and pH was statistically significant. Hydraulic retention time was not important. The best treatment among those studied was obtained at pH 3, current density 23.9 mA cm−2, and 3.7 g L−1 of resin concentration, with 96% decolorization. The best results with decolorization higher than 86% were obtained at acidic or slightly acidic pH, and higher levels of current density and resin concentration, or lower level of current density and resin concentration. © 2016 Chinese Institute of Environmental Engineering, Taiwan

Elbroch L.M.,Panthera | Lopez-Gonzalez C.,Autonomous University of QueretaroQueretaro | Fitzgerald J.,Panthera | Kusler A.,Panthera | Quigley H.,Panthera
Mammalian Biology | Year: 2017

Much of our understanding of the effects top predators play in structuring ecological communities are from studies documenting ecological changes following the recovery or reintroduction of large carnivores. Reintroduced predators, for example, may create unanticipated competition scenarios that influence local carnivore guilds. Here, we tested whether newly released Mexican gray wolves in Chihuahua, Mexico interacted with resident pumas, as a first step in exploring potential competition between the two species. We employed GPS data and novel methods offered by MoveMine 2.0 to quantify attraction-repulsion between individual wolves and pumas during two time periods: the first when wolves were free roaming, and the second when they restricted their movements to an area around their den and rendezvous site to protect and provide for pups. In summary, attraction-repulsion analyses conducted with MoveMine provided meaningful outputs, but we would highlight the importance of fieldwork to interpret interactions and significance values calculated between pairs. We found that high attraction values resulted from mutual attraction between wolves in the same pack, between wolves and one puma they repeatedly harassed, as well as between two pumas that repeatedly exhibited social tolerance for each other. Thus, the analyses offered by MoveMine provided a powerful means of identifying interactions and assessing attraction-repulsion relevant to questions of intra- and interspecific competition, but required intimate knowledge of the species studied and the interactions between them to interpret outputs correctly. © 2017 Deutsche Gesellschaft für Säugetierkunde

Perez-Ramirez I.F.,Autonomous University of QueretaroQueretaro | Gonzalez-Davalos M.L.,National Autonomous University of Mexico | Mora O.,National Autonomous University of Mexico | Gallegos-Corona M.A.,Autonomous University of QueretaroQueretaro | Reynoso-Camacho R.,Autonomous University of QueretaroQueretaro
Journal of Functional Foods | Year: 2017

This study aimed to evaluate the effect of Ocimum sanctum and Crataegus pubescens extracts on obesity, inflammation, and glucose metabolism in obese rats. Both extracts exerted anti-obesogenic effects, which was associated to increased fecal triacylglycerol excretion and decreased their accumulation in adipose tissue, decreasing adipocyte hypertrophy. O. sanctum showed the greatest hypoglycemic effect, which was associated to its anti-inflammatory effect, as well as an increased hepatic glycogen content and decreased PEPCK and G6Pase hepatic activities. Conversely, C. pubescens (0.5 and 1.0 mg/mL) increased Glut4, Irs1 and Pi3k gene expression in 3T3 L1 adipocyte cells. The beneficial effect of O. sanctum was associated to its high content of ellagic acid, epicatechin, epigallocatehin gallate and rutin, whereas the hypoglycemic effect of C. pubescens was mainly associated with its content of gallic acid. These results suggest that these herbs may be used for the elaboration of functional beverages with hypoglycemic properties. © 2017 Elsevier Ltd

Lopez C.V.,Autonomous University of QueretaroQueretaro | Pedraza J.C.,Autonomous University of QueretaroQueretaro | Ramos J.M.,Autonomous University of QueretaroQueretaro | Silva E.G.,Autonomous University of QueretaroQueretaro | Gorrostieta Hurtado E.,Autonomous University of QueretaroQueretaro
Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) | Year: 2017

Fringe projection is an optical method used to perform three-dimensional reconstruction of objects by applying structured light and phase detection algorithms. Some of these algorithms make use of the wavelet transform, which is a function that splits a signal into sub-signals with different scales at different levels of resolution. However, despite the above characteristics, the use and implementation of the wavelet transform requires good parameterization of the many variables involved for each wavelet function (scale and translation coefficient variation), in addition to analyze different wavelet functions such as Morlet, Paul Mother, and Gaussian, among others. Based on these requirements, the present paper aims to develop an in-depth analysis of the most suitable parameters for the Shannon, B-Spline and Morlet Wavelets that ensure the most efficient 3D reconstruction. The experimental results are presented using a set of virtual objects and can be applied to a real object for the purpose of validation. © Springer International Publishing AG 2017.

Sabbah M.,University of Naples Federico II | Sabbah M.,An Najah National University | Di Pierro P.,University of Naples Federico II | Giosafatto C.V.L.,University of Naples Federico II | And 4 more authors.
International Journal of Molecular Sciences | Year: 2017

Zeta potential and nanoparticle size were determined on film forming solutions of native and heat-denatured proteins of bitter vetch as a function of pH and of different concentrations of the polyamines spermidine and spermine, both in the absence and presence of the plasticizer glycerol. Our results showed that both polyamines decreased the negative zeta potential of all samples under pH 8.0 as a consequence of their ionic interaction with proteins. At the same time, they enhanced the dimension of nanoparticles under pH 8.0 as a result of macromolecular aggregations. By using native protein solutions, handleable films were obtained only from samples containing either a minimum of 33 mM glycerol or 4 mM spermidine, or both compounds together at lower glycerol concentrations. However, 2 mM spermidine was sufficient to obtain handleable film by using heat-treated samples without glycerol. Conversely, brittle materials were obtained by spermine alone, thus indicating that only spermidine was able to act as an ionic plasticizer. Lastly, both polyamines, mainly spermine, were found able to act as “glycerol-like” plasticizers at concentrations higher than 5 mM under experimental conditions at which their amino groups are undissociated. Our findings open new perspectives in obtaining protein-based films by using aliphatic polycations as components. © 2017 by the authors. Licensee MDPI, Basel, Switzerland.

Nava Vargas A.,Autonomous University of QueretaroQueretaro | Guerrero Solorio R.,Autonomous University of QueretaroQueretaro | Rodriguez Hernandez E.,CENID FyMA INIFAPQueretaro | Pizano Martinez O.,University GuadalajaraJalisco
Preventive Veterinary Medicine | Year: 2016

Bovine tuberculosis (bTB) is a disease caused by Mycobacterium bovis (M. bovis), which affects cattle, animal species and humans. To determinate the genetic structure of strains of M. bovis in mexican cattle, 467 isolates obtained from 2009 to 2010 from different regions of Mexico with known spoligotype were included in the study. The isolates were genotyped by interspersed repeated mycobacterial units-variable number tandem repeats (MIRU-VNTR) obtaining 13 MIRU-VNTR groups. When combining MIRU-VNTR patterns with its spolygotypes, the Hunter genetic discrimination index (HGDI), we obtained 421 genetic patterns distributed in 17 groups. The HGDI for the total loci was 0.99. The locus that presented the higher HGDI was 2461 (0.857), while the locus with the lowest HGDI was 2686 (0.239). When we analyzed our results, using just 6 or 8 MIRU-VNTR we obtained an discriminatory power of 0.8499 and 0.8875 respectively indicating lower HGDI than 12 MIRU-VNTR locus. © 2016

de Fatima Rosas-Cardenas F.,National Polytechnic Institute of Mexico | de Fatima Rosas-Cardenas F.,Research Center en Biotecnologia Aplicada del Instituto Polytechnic NacionalTlaxcala | Escobar-Guzman R.,National Polytechnic Institute of Mexico | Cruz-Hernandez A.,Autonomous University of QueretaroQueretaro | And 2 more authors.
Frontiers in Plant Science | Year: 2015

microRNAs are a class of non-coding small RNAs (sRNAs) that are important regulators of gene expression at the post-transcriptional level by mRNA cleavage or translation inhibition. Another class of sRNAs are siRNAs, which also regulate gene expression but by causing DNA methylation. This epigenetic regulatory role has been observed for some miRNAs as well. The use of sRNAs allows the development of biotechnological applications in plants. To develop these types of applications, and to better understand the natural roles they play, it is important to be able to detect and to localize these sRNAs at the plant tissue level. Sometimes, in crop plants this can be challenging. Therefore, we developed a tissue printing hybridization protocol for easy and efficient detection of sRNAs and demonstrate this by the analysis of the spatio-temporal expression patterns of the miRNAs miR159 and miR164 in fruits of various crop plants. Moreover, we show the possibility to also detect the expression of miRNAs in fruit juice using a dot blot hybridization approach. © 2015 Rosas-Cárdenas, Escobar-Guzmán, Cruz-Hernández, Marsch-Martínez and de Folter.

De Moure-Flores F.,Autonomous University of QueretaroQueretaro | Guillen-Cervantes A.,CINVESTAV | Campos-Gonzalez E.,CINVESTAV | Santoyo-Salazar J.,CINVESTAV | And 7 more authors.
Materials Science in Semiconductor Processing | Year: 2015

Copper indium disulfide (CuInS2) thin films were prepared by chemical bath deposition in an acid medium on glass substrates. CuInS2 films were grown using CuSO4, InCl3 and C2H5NS as copper, indium and sulfur sources, respectively. The CuSO4 and C2H5NS concentrations remained constant, while the InCl3 concentration was varied from 0.002 M to 0.025 M. The structural analysis show that initially the films have a mixture of CuS and CuInS2 phases, when the indium nominal concentration increases the formation of CuInS2 ternary compound was promoted until the final formation of a CuInS2 film. The morphological study shows that the surface of CuInS2 films is constituted by nanotubes. The structural and compositional analysis show that for 0.025 M InCl3 concentration CuInS2 films were obtained. © 2015 Elsevier Ltd. All rights reserved.

Cu F.,Autonomous University of QueretaroQueretaro | Rangel P.,Autonomous University of QueretaroQueretaro
Revista Chilena de Nutricion | Year: 2015

Introduction: At one year of age, factors that favor the develo- pment of obesity and other metabolic disorders in later stages of life are present. Objective: To identify perinatal, societal, and dietary risk factors for excess weight and obesity in 12 months infants. Subjects and methods: Case-control studies with infants under the care of Family Medicine Units. These cases studied were overweight or obese children, and control cases were children at a healthy weight. Each group included 152 infants, who were evaluated based on their responses to a questionnaire, their re- cords, and perinatal, societal, and dietary variables. Results: The variables with statistical significance were high pre-gestational weight, high gestational weight gain (OR 1.79-3.88), absence of breastfeeding and exclusive formula feeding (OR 2.02 and 1.75). Conclusion: In the presence of pre-pregnancy obesity and exclusive formula feeding, there is a 64.4% greater risk of becoming overweight or obese at 12 months old. © 2015, Sociedad Chilena de Nutricion Bromatologia y Toxilogica. All rights reserved.

Avila-Juarez L.,Autonomous University of QueretaroQueretaro | Rodriguez Gonzalez A.,Autonomous University of QueretaroQueretaro | Rodriguez Pina N.,Autonomous University of QueretaroQueretaro | Guevara Gonzalez R.G.,Autonomous University of QueretaroQueretaro | And 3 more authors.
Journal of Soil Science and Plant Nutrition | Year: 2015

Due to low yields, organic agriculture cannot satisfy the global demand for food, although it can provide products of higher nutraceutical quality. The objective of this research was to incorporate vermicompost leachates (VCLs) into an irrigation system during tomato (Solanum lycopersicum cv. Rafaello) cultivation to evaluate their effects on the lycopene, β-carotene, and phenolic content of tomatoes and on the physical and chemical soil variables. To evaluate the effects of VCLs, three types of substrates were used to create VCLs: mushroom waste (MSHW), leaf-cutting ant waste (LCAW), and cow compost (CC). A total of 0.1 L of leachate per plant was added as a supplement to a nutrient solution (NS) and applied once weekly, twice weekly, or every fifteen days to three different treatments for each leachate. All VCLs had a positive effect on the production of lycopene; the best results were obtained by the application of the MSHW (78 mg kg-1 fresh weight). The VCL decreased the presence of ions phytotoxic to plants by 99% and improved the soil structure by increasing the amount of organic matter and the hydraulic conductivity. However, the VCL had no effect on the physiological variables. The results support the use of leachate from CC via fertigation twice a week at a dose of 0.1 L plant -1 because it increases lycopene content by 67%. © 2015, Sociedad Chilena de la Ciencia del Suelo. All rights reserved.

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