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Search Results: 1 - 10 of 446101 matches for " Jesús Manuel; Romero B "
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EFECTO ADVERSO EN LA CALIDAD PROTEICA DE LOS ALIMENTOS DE DIETAS CON ALTO CONTENIDO DE FIBRA DIETARIA
Falcón V,María del Refugio; Barrón H,Jesús Manuel; Romero B,Ana Lourdes; Domínguez S,Milagros Francisca;
Revista chilena de nutrición , 2011, DOI: 10.4067/S0717-75182011000300012
Abstract: modern diet tends to change eating habits and there is a tendency to consume more processed foods. these changes in eating habits towards more consumption of processed food, and the recognized benefic effects of dietary fiber by consumers, tend to increase the number of "high fiber" foods in the market. although the beneficial effects of dietary fiber on human health is widely recognized, this increased consumption of dietary fiber may also have adverse effects on digestion, absorption and utilization offood proteins. research in the past has shown that the consumption of high dietary fiber diets have an adverse effect on certain indicators of protein quality. therefore it becomes very important to study the physicochemical properties of the various sources of dietary fiber, as well as the presence of other factors, associated to the fibrous fraction, in their possible negative influence on the protein quality of rich dietary fiber diets.
EFECTO ADVERSO EN LA CALIDAD PROTEICA DE LOS ALIMENTOS DE DIETAS CON ALTO CONTENIDO DE FIBRA DIETARIA ADVERSE EFFECT ON THE FOOD PROTEIN QUALITY OF DIETS HIGH IN DIETARY FIBER
María del Refugio Falcón V,Jesús Manuel Barrón H,Ana Lourdes Romero B,Milagros Francisca Domínguez S
Revista Chilena de Nutricíon , 2011,
Abstract: La dieta moderna cambia los hábitos alimenticios y existe una tendencia al consumo de alimentos más procesados. El cambio de hábito alimentario hacia alimentos más procesados tiende a incrementar, algunas veces por propósitos publicitarios, aquellos alimentos procesados "altos en fibra". Si bien los efectos benéficos de la fibra dietética a la salud humana son ampliamente reconocidos, este aumento en el consumo de fibra dietética puede también tener efectos adversos en la digestión, absorción y utilización de la proteína de los alimentos. En las investigaciones revisadas se obtuvo que el consumo de dietas altas en fibra dietética tiene efecto adverso en ciertos indicadores de calidad proteica, por lo que la inclusión de fuentes proteicas con altos contenidos de fibra impone la necesidad de estudiar las características físico-químicas de la fibra dietética, así como la presencia de factores que pudieran unirse a la fracción fibrosa e influir negativamente en la calidad proteica. Modern diet tends to change eating habits and there is a tendency to consume more processed foods. These changes in eating habits towards more consumption of processed food, and the recognized benefic effects of dietary fiber by consumers, tend to increase the number of "high fiber" foods in the market. Although the beneficial effects of dietary fiber on human health is widely recognized, this increased consumption of dietary fiber may also have adverse effects on digestion, absorption and utilization offood proteins. Research in the past has shown that the consumption of high dietary fiber diets have an adverse effect on certain indicators of protein quality. Therefore it becomes very important to study the physicochemical properties of the various sources of dietary fiber, as well as the presence of other factors, associated to the fibrous fraction, in their possible negative influence on the protein quality of rich dietary fiber diets.
Flow-Injection Flame Atomic Absorption Determination of Hexavalent Chromium with On-Line Preconcentration on an Anion Imprinted Polymer  [PDF]
María Carmen Yebra-Biurrun, Jesús Manuel Castro-Romero, Nieves Carro-Mari?o
American Journal of Analytical Chemistry (AJAC) , 2012, DOI: 10.4236/ajac.2012.311100
Abstract: A flow injection preconcentration system for the flame atomic absorption spectrometric determination of hexavalent chromium has been developed. The method employs on-line preconcentration of Cr(VI) on a minicolumn packed with Cr(VI)-imprinted poly(4-vinyl pyridineco-2-hydroxyethyl methacrylate) placed into a flow injection system. Hexava-lent chromium was eluted with a small volume of diluted hydrochloric acid into the nebulizer-burner system of a flame atomic absorption spectrometer. An enrichment factor of 550 and a 3σ detection limit of 0.04 μg·L-1 along a sampling frequency of 4 h-1 at a sample flow rate of 3.5 mL·min-1. The relative standard deviation is 2.9% for 1 μg·L-1 Cr(VI) (n = 11). The flow injection system proposed has the advantage of being simpler because the use of expensive and sophisticated instruments is avoided. Ease of use, continuous process and selectivity make this method suitable for Cr(VI) determination in different environmental samples such as sea and river waters, soils and sediments.
Bright Red Luminescence and Structural Properties of Eu3+ Ion Doped ZnO by Solution Combustion Technique  [PDF]
Sebastián López-Romero, María Jesús Quiroz-Jiménez, Manuel Hipólito García, Alfredo Aguilar-Castillo
World Journal of Condensed Matter Physics (WJCMP) , 2014, DOI: 10.4236/wjcmp.2014.44024
Abstract: Pure, and Europium ion doped Zinc oxide nanocrystals (ZnO:Eu3+) were synthesized by a solution combustion technique. The X-ray diffraction patterns (XRD) reveals the existence of the Eu2O3 phase. From the results of both, X-ray diffraction and photoluminescence spectra (PL) reveal that Eu3+ ions successfully substitute for Zn2+ ions in the ZnO lattice, moreover, when the amount of doped Europium was varied, this changes are showed in changes in the luminescence intensity. The PL is broad and a set of colors was emitted which originates from ZnO and the intra 4f transitions of Eu3+ ions. The existence of the Zn-O, Eu3+-O and O1s bonding energies were confirmed by X-ray photoelectron spectroscopy (XPS) technique. The samples morphology was registered by a scanning electron microscopy (SEM) technique, and reveals that Europium ions are present on the surface of the ZnO nanocrystals.
ZnO Planar-Tetrapod Synthesized by Cethyltrimethylamonium Hydroxide-Assisted Hydrothermal Method at Low Temperature  [PDF]
Sebastián López-Romero, Manuel García-Hipólito, Mayte Saraí Valverde Labastida, María de Jesús Quiroz Jiménez
World Journal of Condensed Matter Physics (WJCMP) , 2015, DOI: 10.4236/wjcmp.2015.54034
Abstract: Planar tetrapods ZnO (PTP-ZnO) or cross shaped tetrapod nanostructures were synthesized by a cethyltrimethylamonium hydroxide (CTAOH)-assisted hydrothermal method at low temperature (120°C). The XRD diffractogram showed that the PTP-ZnO nanostructures showed a hexagonal wurtzite phase. The studies with high resolution transmission electron microscopy (HRTEM) and select area specific diffraction (SAED) revealed that the ZnO pods were single crystals and preferentially grew up along [002] direction. The growth mechanism of the CTAOH assisted-hydrothermal synthesized PTP-ZnO nanostructures is explained using the final shape guiding of materials nanostructured and surfactant-action theories.
Protein Quality Evaluation of Animal Food Proteins by In-Vitro Methodologies  [PDF]
Jesús Manuel Barrón-Hoyos, Adrian Rafael Archuleta, María del Refugio Falcón-Villa, Rafael Canett-Romero, Francisco Javier Cinco-Moroyoqui, Ana Lourdes Romero-Barancini, Edgar Omar Rueda-Puente
Food and Nutrition Sciences (FNS) , 2013, DOI: 10.4236/fns.2013.44048
Abstract:

Animal protein foods are undoubtedly among the most concentrated source of essential amino acids (AA) for the human diet. However, their high prices and diseases associated to their excessive consumption have fomented the consumption of other alternative sources of animal proteins such as those from marine or aquatic species. Sonora is a well recognized producer of animal foods in Mexico, both terrestrial and aquatic. In this study, the protein quality evaluation of these animal food sources, highly produced and consumed in Sonora, is proposed, using in-vitro methodologies. Four different species, from each aquatic and terrestrial origin, were selected. Samples of lean muscle were used in all cases. Various in-vitro methodologies for protein quality evaluation were selected, alternatives to the animal bioassays: % digestibility, Total amino acid analyses (HPLC), PDCAAS, computerized PER calculations (C-PER and DC-PER) and total collagen contents. % in-vitro digestibility presented significant differences among samples from terrestrial species, but muscle from aquatic species did not showed significant differences. All sources of proteins, both aquatic and terrestrial proved to be rich sources of essential amino acids. PDCAAS was unable to establish significant differences in protein quality among sources of protein from different origin. Both methods C-PER and DC-PER were more exact in their results and were able to detect significant differences among samples of different origin. An important finding was the great difference in the total collagen content between aquatic and terrestrial sources of proteins, where terrestrial muscle proteins had almost 10-time more collagen than aquatic protein sources. However, these collagen contents did not seem to have a significant influence in the protein quality of these animal proteins. These muscle proteins, from both aquatic and terrestrial species, confirmed to have a high protein quality and some of the in-vitro methodologies used in this study represent a valuable alternative to the animal bioassays.

Especies de Conotrachelus (Coleoptera: Curculionidae: Molytinae) asociadas a guayaba y descripción de una nueva especie Species of Conotrachelus (Coleoptera: Curculionidae: Molytinae) associated to the guava and new species description
MANUEL DARíO SALAS-ARAIZA,JESúS ROMERO-NáPOLES
Revista Colombiana de Entomología , 2012,
Abstract: Se describe e ilustra una nueva especie de Conotrachelus que se alimenta de Psidium guajava y se ofrece una clave para las especies asociadas a este frutal. A new species of Conotrachelus is described. It was collected feeding in fruits of Psidium guajava. A key to identify species related to this fruit is included.
Contribución al estudio de los brúquidos (insecta: coleoptera) asociados a fabaceas arbustivas. CONTRIBUCIóN AL ESTUDIO DE LOS BRúQUIDOS (INSECTA:COLEóPTERA) ASOCIADOS A FABACEAS ARBUSTIVAS
Manuel Darío Salas Araiza,Jesús Romero Nápoles,Eduardo García Aguilera
Acta Universitaria , 2012,
Abstract: Se identificaron las especies de brúquidos que atacan las semillas de Prosopis laevigata (mezquite), Acacia spp. (huizache) y Mimosa biuncifera (gatu o), en el municipio de Irapuato, Gto. México. Las semillas de P. laevigata fueron da adas por Algarobius johnsoni Kingsolver en un 44%. En semillas de Acacia se encontraron a Stator vachelliae Bottimer, Stator sordidus (Horn) y Mimosestes nubigens (Mots.), causando da os del 32 al 84%. En M. biuncifera se detectó a Stator pruininus (Horn) como responsable del 53% de da o en las semillas. Identified in the municipaly of Irapuato, Gto., Mexico were the species of Bruchidae that attack the seeds of Prosopis laevigata (mezquite), Acacia spp. (huizache), and Mimosa biuncifera (gatu o). Damage of the seeds of P. laevigata by Algarobius johnsoni Kingsolver was at 44%. In the seeds of Acacia were found Stator vachelliae Bottimer, Stator sordidus (Horn), and Mimosestes nubigens (Mots.), causing losses from 32 to 84%. In M. biuncifera was detected Stator pruininus (Horn), responsible fot damaging 53% of its seeds.
Prevalencia de anticuerpos contra Histophilus somni y factores de riesgo en ganado para carne en Yucatán, México
José Jesús Solís Calderón,José Candelario Segura Correa,Francisco Aguilar Romero,Víctor Manuel Segura Correa
Veterinaria México , 2008,
Abstract: El propósito de este estudio fue investigar la seroprevalencia de la infección por H. somni y determinar algunos factores de riesgo asociados con su seropositividad en ganado para carne en la región ganadera de Yucatán, México. Asimismo, se estimó el coefi ciente de correlación dentro de hatos (re) y el efecto de dise o (D). Los animales se seleccionaron usando un muestreo aleatorio en dos etapas. Las muestras de sangre se recolectaron de 490 animales en 35 hatos, y los sueros se sometieron a análisis para detectar anticuerpos contra H. somni, mediante la prueba de inmunodifusión doble en agar. La información acerca del hato y de cada animal muestreado se obtuvo mediante una encuesta aplicada personalmente en el rancho. Los datos se analizaron mediante pruebas de Ji-cuadrada. Diez hatos tuvieron cero animales seropositivos, 19 tuvieron uno, y seis tuvieron dos animales seropositivos. Treinta y uno de los 490 animales fueron seropositivos. La prevalencia animal ajustada por el tama o del hato fue 5.5% (intervalo de confi anza al 95% = 3.5%, 7.5%). La seroprevalencia de los animales en los seis municipios varió de 3.6% a 9.5%, pero no se encontraron diferencias signifi cativas (P = 0.89). Los valores de re y D para la seroprevalencia de H somni fueron 0 (EE = 0.01) y 1 (EE = 0.19), respectivamente. Las pruebas de Ji-cuadrada no mostraron asociación (P > 0.10) entre la presencia de anticuerpos contra H. somni y los factores de riesgo investigados.
Ontological Representation of Light Wave Camera Data to Support Vision-Based AmI
Miguel ángel Serrano,Juan Gómez-Romero,Miguel ángel Patricio,Jesús García,José Manuel Molina
Sensors , 2012, DOI: 10.3390/s120912126
Abstract: Recent advances in technologies for capturing video data have opened a vast amount of new application areas in visual sensor networks. Among them, the incorporation of light wave cameras on Ambient Intelligence (AmI) environments provides more accurate tracking capabilities for activity recognition. Although the performance of tracking algorithms has quickly improved, symbolic models used to represent the resulting knowledge have not yet been adapted to smart environments. This lack of representation does not allow to take advantage of the semantic quality of the information provided by new sensors. This paper advocates for the introduction of a part-based representational level in cognitive-based systems in order to accurately represent the novel sensors’ knowledge. The paper also reviews the theoretical and practical issues in part-whole relationships proposing a specific taxonomy for computer vision approaches. General part-based patterns for human body and transitive part-based representation and inference are incorporated to an ontology-based previous framework to enhance scene interpretation in the area of video-based AmI. The advantages and new features of the model are demonstrated in a Social Signal Processing (SSP) application for the elaboration of live market researches.
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