Bear V.C.,University Leonardo da Vinci |
Pacheco M.M.,University Leonardo da Vinci |
Lemus O.Z.,University la Canada
Nutricion Clinica y Dietetica Hospitalaria | Year: 2017
Introduction: Obesity has become a public health problem worldwide. Children and adolescents with overweight and obesity have a higher risk of developing chronic diseases in adulthood, therefore early diagnosis; to correct and prevent this condition is necessary. Objectives: To estimate the nutritional status of adolescents who attend high school level in the city of Tehuacán Puebla and the possible association of the school they attend (public or private) Methods: A total of 112 students were analyzed by different anthropometric measurements such as: weight, height, triceps skinfold, arm circumference, and determine the following body dimensions: body mass index, arm muscle area and arm fat area. Results: By studying the prevalence of overweight and obesity, the results showed that women who goes to private schools have a higher percentage 34.77% compared to 16.66% of those who goes to public schools, about man the percentage is very similar between the two group of study with 31% for private schools and 33.33% in public schools. Regarding to above the norm caloric reserve showed highest prevalence in students from private schools for both genders. Discussion: The results suggest a prevalence of overweight and obesity in students of both genders, although this disease is higher in students attending private schools. Conclusions: The higher Values above the norm in terms of body mass index and fat arm area was from Students that attends private schools, and it can have an impact to the socioeconomic factor.
Mejia-Romero S.,National Institute of Astrophysics, Optics and Electronics |
Berriel-Valdos L.R.,National Institute of Astrophysics, Optics and Electronics |
Aguilar J.F.,National Institute of Astrophysics, Optics and Electronics |
Orlando I.J.,University la Canada
Proceedings of SPIE - The International Society for Optical Engineering | Year: 2011
In this work, experimental results are obtained from the behavior of the Discrete Wigner Distribution Function (DWDF), when is applied on a detected image of an object of small dimensions, non-resolved by the optical system (OS). The object is illuminated with a laser source. We verify that for the average of several detected images the DWDF is positive inside a frequency interval of four times the bandwidth of the OS. However, when the object is not a quasi-point source the DWDF has positive and negative values inside the same interval. This is an indication that in this case the object is resolved by the OS. Numerical and experimental results are shown and compared to support this conjecture. © 2011 Copyright Society of Photo-Optical Instrumentation Engineers (SPIE).
Medina-Torres L.,National Autonomous University of Mexico |
Vernon-Carter E.J.,Metropolitan Autonomous University |
Gallegos-Infante J.A.,Durango Institute of Technology |
Rocha-Guzman N.E.,Durango Institute of Technology |
And 3 more authors.
Journal of the Science of Food and Agriculture | Year: 2011
BACKGROUND: The process of convective drying was evaluated in terms of the bioactive compounds contained in nopal samples before and after dehydration. Total polyphenol, flavonoid, flavonol, carotene and ascorbic acid contents were determined in undehydrated and dehydrated samples. Two drying temperatures (45 and 65 °C) and two air flow rates (3 and 5 m s-1) were evaluated. The rheology of samples under the best drying conditions was also studied, since it provides important information regarding processing (mixing, flow processing) as well as the sensory attributes (texture) of rehydrated samples. RESULTS: Non-Newtonian shear-thinning behaviour was observed for samples dried at 45 °C, while samples dried at 65 °C showed shear-thickening behaviour, possibly caused by thermal chain scission of high-molecular-weight components. CONCLUSION: The best conditions for bioactive compound preservation were a drying temperature of 45 °C and an air flow rate of 3 m s-1, resulting in 40.97 g phenols, 23.41 g flavonoids, 0.543 g β-carotene and 0.2815 g ascorbic acid kg-1 sample as shown in table 3. © 2011 Society of Chemical Industry.
Carrillo-Ocampo D.,Autonomous University of the State of Morelos |
Bazaldua-Gomez S.,Autonomous University of the State of Morelos |
Bonilla-Barbosa J.R.,Autonomous University of the State of Morelos |
Aburto-Amar R.,University la Canada |
Rodriguez-Lopez V.,Autonomous University of the State of Morelos
Molecules | Year: 2013
Castilleja tenuiflora (Orobanchaceae) has been used in Mexican traditional medicine as a treatment for cough, dysentery, anxiety, nausea and vomiting as well as hepatic and gastrointestinal diseases. The ethanolic extract of the aerial parts of Castilleja tenuiflora was separated by silica gel column chromatography. The fractions were evaluated using the induced edema acetate 12-O-tetradecanoylphorbol (TPA) anti-inflammatory activity model. The most active fraction was subjected to medium-pressure liquid chromatography (MPLC) with UV detection at 206 and 240 nm. The following iridoids were isolated: geniposidic acid, aucubin, bartioside, 8-epi-loganin, mussaenoside, and the phenylpropanoid verbascoside. The most active iridoid was geniposidic acid, which was more active than the control (indomethacin), and the least active iridoid was mussaenoside. 8-epi-Loganin, and mussaenoside have not been previously reported to be anti-inflammatory compounds. The results of these investigations confirm the potential of Mexican plants for the production of bioactive compounds and validate the ethnomedical use of Castilleja tenuiflora-like anti-inflammatory plants. © 1996-2013 MDPI AG.
Effect of solvent-temperature extraction conditions on the initial antioxidant activity and total phenolic content of muitle extracts and their decay upon storage at different pH [Efecto de las condiciones de extraccio ́ n solvente-temperatura en la actividad antioxidante y contenido de fenoles totales en extractos de muitle y su pérdida durante el almacenamiento a diferentes valores de pH]
Garcia-Marquez E.,Metropolitan Autonomous University |
Roman-Guerrero A.,Metropolitan Autonomous University |
Perez-Alonso C.,National Autonomous University of Mexico |
Cruz-Sosa F.,Metropolitan Autonomous University |
And 2 more authors.
Revista Mexicana de Ingeniera Qumica | Year: 2012
The effect of solvent and extraction temperature on the initial antioxidant activity (AA) and total phenolic content (TPC) of Muitle (Justicia spicigera) extracts and their decay upon storage at different pH values was studied. Extraction with aqueous solvents, at either 25 or 60 °C, produced fresh extracts (pH 7.4) with higher initial TPC and AA. Extracts were adjusted to different pH's displayed different TPC and AA decay rates upon storage. TPC had first order decay kinetics, characterized by a relatively quick constant (k 1) at relatively short storage times followed by a relatively slow constant (k 2) at relatively large storage times. ABTS and DPPH assays estimated different AA in the extracts, attributed to compatibility differences between the bioactive species and the free radicals.
PubMed | National Autonomous University of Mexico, University la Canada and Escuela Superior de Medicina IPN
Type: | Journal: BMC complementary and alternative medicine | Year: 2015
The fruit of Cyrtocarpa procera is used to treat stomach diseases by people living in San Rafael, Coxcatlan, Puebla. This work investigated the antibacterial, antioxidant, cytotoxic and anti-inflammatory activities of the fruit produced by this species.Methanol extract was obtained by maceration. After obtaining the methanol extract (MeOH1), methanol subextract (MeOH2) and hexane (H) were obtained. The antibacterial activities of MeOH1, MeOH2 and H were evaluated through disc-diffusion. The quenching of free radicals was evaluated by decolorizing a methanolic DPPH solution. The cytotoxic activity of MeOH2 was evaluated by in vitro assay system of growth inhibition of human cervical carcinoma cell line (CasKi). The IL-1 and TNF- were determined through ELISA in the supernatants of the macrophage cell line (RAW 264.7). The MeOH2 subextract was separated by column chromatography, seventy-three fractions were collected.The Gram-positive and -negative bacteria examined were sensitive to MeOH1 and MeOH2; the MeOH2 was bactericidal toward Staphyloccocus aureus (MIC=4mg/mL) and Vibrio cholera (MIC=4mg/mL). The MeOH2 inhibited the DPPH radical (SC50=69.7g/mL), but a cytotoxicity assay revealed that the extract is not toxic according to the National Cancer Institute (LD50=22.03g/mL). The production of proinflammatory cytokines (IL- 1 and TNF- ) by LPS- stimulated macrophages was reduced after the treatments. The methanol extract contained various organic acids, such as citric acid, palmitic acid and - linoleic acid.The fruits of Cyrtocarpa procera are employed to treat ailments such as diarrhea, in this study were demonstrated some biological activities involved in a bacterial infection. This is the first research about of the medicinal properties of C. procera fruit.
Soancatl V.,Istmo University of Mexico |
Leon A.,Istmo University of Mexico |
Martinez C.,University la Canada |
Torres L.,Tecnologico de Atlixco
4th European Conference on Games Based Learning 2010, ECGBL 2010 | Year: 2010
Solving problems is the most essential part of mathematics and it is well known that it has been difficult for students all over the world. In this paper we describe a method for solving maths problems based on the Polya's four phase method. This approach leads the student step by step through the process of solving maths problems. In order to lead students to solve math problems, we focus on a technique called question-led learning that can be a form of learning. This style of learning helps students when attempting to respond, as best they can to questions they do not know the answers to. Question-led learning forces them to think about the information and choose the correct answer through reasoning, rather than just being told the correct answer. Thus learners are actively participating and using decision making skills. This approach has been so popular around the world and easily grabs people's time and attention making it an obvious vehicle for digital game based learning. Solving problems requires lots of repetitive practice and computers are very good at presenting a series of problems and keeping track, statistically, of how people answer them. We describe a database that stores information about problems and steps that solve them, recommendations for each problem, time limit to solve the problems, points per problem, and difficulty level. Additionally the database stores information about learners such as: name, age, gender, score, number of solved problems, number of faults, time taken to solve a problem. We also integrate the question-led learning method and the database in a game-based learning software, since both the method and database integrate interesting game features games. We expect the software to be distributed and share among students, teachers, schools and libraries as soon as the database stores enough problems. Teachers can use it in classrooms where learners will be able to collaborate in communities of practice-sharing ideas, cheats, hints and tips and encouraging progress to higher skill levels. This in turn can also be very useful for educational assessment and research.
Fernandez V.M.J.,University of Veracruz |
Paxtian Z.J.H.,University la Canada
International Journal of Circuits, Systems and Signal Processing | Year: 2011
In this paper a digital circuit architecture dedicated to median filtering of grayscale images is presented. The architecture emerges from a sorting network based median algorithm which effectiveness is verified by Matlab programming and its hardware implementation tested on a Spartan-3E FPGA device. The median pixel computation is approached by a sorting network scheme which is constituted by seven three-data comparator modules and hierarchically composed by twenty one switch/compare circuits. The successful operation of the threedata comparator module is demonstrated by transistor level SPICE simulations using 0.5μm CMOS technology.
Jimenez-Fernandez V.M.,University of Veracruz |
Dominguez-Chavez J.A.,University of Veracruz |
Vazquez-Leal H.,University of Veracruz |
Gallardo Del Angel A.,University of Veracruz |
Hernandez-Paxtian Z.J.,University la Canada
Revista Mexicana de Fisica E | Year: 2012
The physical realization of memristor, achieved by the Hewlett Packard Laboratories in 2008, has become this novel device into an important topic under study in the Electronics Engineering area. However, in spide of the existence of several papers, theses, book chapters, and technical reports about this topic found in databases, it is unfortunate the lack of references written in spanish and furthermore references that approach it under a perspective which let an easy understanding with the only academic background requirement of basic concepts of electromagnetism. Taking in account this fact as motivation, this paper emerges with the objective of being an introductory reference for undergraduate students in Physics, Electrical Engineering or Electronics Engineering that could be interested in beginning a study about the memristor electrical model. The model proposed by Hewlett-Packart has been taken as reference and its verification has been performed through Maple Realease 13.0 and PSpice simulations.
Gonzalez-Montiel L.,University la Canada |
Franco-Fernandez M.J.,Autonomous University of the State of Hidalgo
Brazilian Journal of Food Technology | Year: 2015
The composition of the microbiota of the Aro cheese marketed in the municipality of Teotitlan de Flores Magon, Oaxaca, Mexico, was determined, quantifying the aerobic mesophilic bacteria, psychrophilic bacteria, total coliforms, Escherichia coli, Staphylococcus aureus, Salmonella, Enterococcus, Streptococcus, lactic acid bacteria, moulds and yeasts. The results showed that the Aro cheese contained pathogenic and spoilage microorganisms as well as those of industrial importance. None of the samples analysed complied with NOM-243-SSA1-2010. Thus this cheese could transmit foodborne illnesses, due to its high content of E. coli, Staphylococcus aureus and Salmonella. The shelf life of the cheese could also be affected causing economic losses to the producers. On the other hand, microorganisms of industrial importance can be obtained (Lactobacillus and Streptococcus). It is necessary to implement quality assurance systems to guarantee the production of innocuous cheeses.