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Search Results: 1 - 10 of 110457 matches for " José Juan; Moreno-Ramos "
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Efecto de la adición de ácido cítrico sobre la degradación de las aflatoxinas y las propiedades funcionales de productos extrudidos de sorgo
Méndez-Albores,Abraham; Martínez-Bustos,Fernando; Véles-Medina,José Juan; Moreno-Ramos,Carolina; Del Río-García,Juan Carlos; Moreno-Martínez,Ernesto;
Interciencia , 2009,
Abstract: sorghum flour contaminated by aflatoxin at a concentration of 140μg·kg-1 was extrusion-cooked in a single screw extruder with a temperature profile of 60-80-100°c. the moisture content (mc) of the flour was adjusted to 20, 25 and 30% by adding aqueous citric acid (ca) at concentrations of 0, 0.5, 1, 2, 4 and 8n. the temperature profile in combination with the mc and ca concentrations significantly affected the extent of aflatoxin reduction in the extruded sorghum; the maximum percentage of aflatoxin reduction was 35.5%. in extruded sorghum prepared with high mc and ca concentrations, the highest values in color difference (de) and smallest values of viscosity were found. the expansion index was favored by higher mc and ca concentrations. the highest cutting force values were found in extruded products prepared with a higher mc, but there were no significant differences between those values and the different ca concentrations evaluated. using moderate extrusion conditions in combination with higher concentrations of ca, products were obtained with acceptable ph, color, viscosity, as well as with good textural and functional properties.
Isolation and Characterization of Mercury Resistant Trichoderma Strains from Soil with High Levels of Mercury and Its Effects on Arabidopsis thaliana Mercury Uptake  [PDF]
José Luis Hernández-Flores, José Gerardo Bernal Melo, Andrés Cruz Hernández, Miguel A. Ramos López, Carlos Salda?a Gutiérrez, Sergio Romero Gomez, Victor Pérez Moreno, Rosa P. Calvillo Medina, José Humberto Valenzuela Soto, Sergio Pacheco Hernández, George H. Jones, Sergio Casas Flores, Juan Campos-Guillen
Advances in Microbiology (AiM) , 2018, DOI: 10.4236/aim.2018.87040
Abstract: Traditional mining activities are usually correlated with high levels of soil pollution, which is a major environmental concern. Extensive mining activities have taken place in the San Joaquin region in the State of Querétaro, México resulting in high levels of mercury soil pollution (up to 1532 ± 300 mg/kg). We isolated mercury-resistant fungal strains from the San Joaquin region soils and identified them through morphologic characteristics and ITS rDNA region sequence analysis. We determined that fungi isolated belong to the genus Trichoderma. All the isolates selected showed the ability to catalyze the volatilization of Hg. For air sampling, an active sampling device was constructed and using acid KMnO4 as an absorbent, the concentration of mercury in solution was determined through the cold vapor atomic absorption method. The results show mercury volatilization from the fungal species assay, with a maximum of 213.04 ± 32.6 μg/m3 while mycelium accumulation ranged from less than 17.5 ± 2.9 to 20.0 ± 3.4 μg/g. The fungal isolates were also evaluated for their ability to reduce mercury uptake in Arabidopsis thaliana. These observations suggest the utility of Trichoderma for the mobilization of mercury in those contaminated soils.
Pobreza e institucionalidad: el rol del estado y las aspiraciones de los pobres de barranquilla (Colombia)
José Luis Ramos R.,José Moreno C.
Investigación y Desarrollo , 2007,
Abstract: En esta investigación se analizan las características socioeconómicas relevantes que tiene la población pobre del distrito de Barranquilla (Colombia), y se destacan en el análisis las aspiraciones y la percepción que estas personas tienen sobre las instituciones de carácter público que se dedican a atender las demandas sociales. El estudio examina la relación entre los ciudadanos menos favorecidos y la institucionalidad social en sus múltiples manifestaciones y dimensiones, siguiendo los preceptos de la teoría institucional. Metodológicamente el estudio responde a un dise o cualitativocuantitativo, de carácter descriptivo-analítico. Para la interpretación de la información recogida a través de las encuestas se realizó un análisis de correspondencias múltiples.
Could Grasshoppers Be a Nutritive Meal?  [PDF]
Julieta Ramos-Elorduy Blásquez, José Manuel Pino Moreno, Víctor Hugo Martínez Camacho
Food and Nutrition Sciences (FNS) , 2012, DOI: 10.4236/fns.2012.32025
Abstract: The nutritive value of 25 edible Orthoptera in Mexico is shown. Protein content ranges from 43.93% to 77.13% (mix of Edible Acrididade of Puebla). Fat percentage goes from 4.22% to 34.21%. Richest species in ashes were Arphia fallax S., Sphenarium histrio G. and Sphenarium purpurascens Ch. with 16.5%. Energy contribution varies from 14.05 kJ to 21.88 kJ. Their amino acids profile was compared with the WHO/FAO/UNU Pattern (1985). The total quantity of es-sential amino acids that all insects species provides was superior to those signaled in the pattern. The highest quantity (53.60 g) was for Sphenarium histrio G. Chemical score goes from 50% to 88%. In vitamins, the highest value in Thiamine and Riboflavine was for Sphenarium magnum M., in Niacine for Sphenarium borrei B., in vitamin C and for vitamin D Acheta domestica L., and in Vitamin A for Periplaneta americana L. In minerals, all species were very rich in magnesium. All the edible orthopterans results were compared with those of the most conventional mexican foods used to obtain proteins. The quantity and quality of the nutrients that these edible orthopterans allows, provides a significant contribution to the nutrition of the peasants who eat them.
Rehabilitation of gait after stroke: a review towards a top-down approach
Juan-Manuel Belda-Lois, Silvia Mena-del Horno, Ignacio Bermejo-Bosch, Juan C Moreno, José L Pons, Dario Farina, Marco Iosa, Marco Molinari, Federica Tamburella, Ander Ramos, Andrea Caria, Teodoro Solis-Escalante, Clemens Brunner, Massimiliano Rea
Journal of NeuroEngineering and Rehabilitation , 2011, DOI: 10.1186/1743-0003-8-66
Abstract: The methods reviewed comprise classical gait rehabilitation techniques (neurophysiological and motor learning approaches), functional electrical stimulation (FES), robotic devices, and brain-computer interfaces (BCI).From the analysis of these approaches, we can draw the following conclusions. Regarding classical rehabilitation techniques, there is insufficient evidence to state that a particular approach is more effective in promoting gait recovery than other. Combination of different rehabilitation strategies seems to be more effective than over-ground gait training alone. Robotic devices need further research to show their suitability for walking training and their effects on over-ground gait. The use of FES combined with different walking retraining strategies has shown to result in improvements in hemiplegic gait. Reports on non-invasive BCIs for stroke recovery are limited to the rehabilitation of upper limbs; however, some works suggest that there might be a common mechanism which influences upper and lower limb recovery simultaneously, independently of the limb chosen for the rehabilitation therapy. Functional near infrared spectroscopy (fNIRS) enables researchers to detect signals from specific regions of the cortex during performance of motor activities for the development of future BCIs. Future research would make possible to analyze the impact of rehabilitation on brain plasticity, in order to adapt treatment resources to meet the needs of each patient and to optimize the recovery process.Stroke is one of the principal causes of morbidity and mortality in adults in the developed world and the leading cause of disability in all industrialized countries. Stroke incidence is approximately one million per year in the European Union and survivors can suffer several neurological deficits or impairments, such as hemiparesis, communication disorders, cognitive deficits or disorders in visuo-spatial perception [1,2].These impairments have an important impact in p
Reading and Writing in Graduation: Requirement or Pleasure?  [PDF]
Milena Ramos, Claus Dieter Stob?us, Maria Inês C?rte Victoria, Juan José Mouri?o Mosquera
Creative Education (CE) , 2014, DOI: 10.4236/ce.2014.517178
Abstract: This paper stems from discussions between the authors about the research survey Ramos held throughout the year 2013, focusing on research in the analysis of teaching practices considered positive, in order to create/foster a culture of reading and writing in Higher Education. Data collection for the study was conducted with 150 students from discipline Education and Children’s Literature, which is developed during the third semester of Pedagogy Undergraduate (Faculty of Education) at Pontifical Catholic University of Rio Grande do Sul-PUCRS, of which 11 testimonies were selected intentionally, why they answered all questions. The theoretical framework is based on approaches that understand the issue of reading and writing as a commitment to be assumed by the university, teachers and students, in order to identify potential for this crop is established, as well as vantages and limitations that challenge to overcome. Qualitative analysis of content showed that empathy with the teacher contributed to the rapprochement of students with writing and reading, both technically and by delight; the scarcity of reading and writing in this Higher Education stage; the need to undertake a joint and collective work between students and their teachers to the practice of reading and writing is seen as a commitment from all disciplines; the need to improve these skills; and the need for a work aimed to scientific literacy in Graduation, for the welfare of students in the institution. At the final of the article we present some suggestions for the development of reading and writing in Higher Education.
Effects of bone marrow cell transplant on thyroid function in an I131-induced low T4 and elevated TSH rat model
Gustavo E Guajardo-Salinas, Juan A Carvajal, ángel A Gaytan-Ramos, Luis Arroyo, Alberto G López-Reyes, José F Islas, Beiman G Cano, Netzahualcoyótl Arroyo-Currás, Alfredo Dávalos, Gloria Madrid, Jorge E Moreno-Cuevas
Journal of Negative Results in BioMedicine , 2007, DOI: 10.1186/1477-5751-6-1
Abstract: At 40 an 80 days after I131 treatment, the study groups TSH and T4 serum values both increased and decreased significantly respectively compared to the negative control group. Eight weeks after cell transplantation, neither TSH nor T4 showed a significant difference in any group. The mean number of SRY gene copies found in group I (Left Intracardiac Transplant) was 523.3 and those in group II (Intrathyroid Transplant) were only 73. Group III (No Transplant) and IV had no copies. Group I presented a partial restore of the histological pattern of rat thyroid with approximately 20% – 30% of normal-sized follicles. Group II did not show any histological differences compared to group III (Positive control).Both a significant increase of TSH and decrease of T4 can be induced as early as day 40 after a low dose of I131 in rats. Restore of normal thyroid function can be spontaneously achieved after using a low dose RAI in a rat model. The use of BM derived cells did not affect the re-establishment of thyroid function and might help restore the normal architecture after treatment with RAI.In the past decade, there have been many reports that provide evidence about the multi-lineage potential of stem cells, [1-3]. Adult stem cells have shown board plasticity that has allowed treatment of heart, liver and principally, blood related disorders, [1,4]. This plasticity and the availability of adult bone marrow stem cells have made them a very promising source for research and clinical treatments.The use of Iodine-131 (I131) to treat patients with hyperthyroidism, Grave's disease, has common side effects such as hypothyroidism that can be permanent [5-12]. In children and adolescent cases, hypothyroidism have been reported in 50 to 95% of patients at 1 year after treatment with Iodine-131 [13-15]. Most studies on the effects of Radioactive Iodine (RAI) on thyroid function conclude that this change is permanent, which is why many patients remain hypothyroid and have the physiologica
Edible aquatic Coleoptera of the world with an emphasis on Mexico
Julieta Ramos-Elorduy, José Moreno, Victor Camacho
Journal of Ethnobiology and Ethnomedicine , 2009, DOI: 10.1186/1746-4269-5-11
Abstract: "The total volume of water in the world is about 1400 million km3. About 71% of the earth's surface is covered by water, with approximately 97.5% of total volume in the oceans and seas and the remaining 2.5% (35 million km3) in fresh water. Of this 2.5% fresh water, 2.18% is concentrated in glaciers, in the atmosphere and in underground aquifers. Because these water stores are difficult to access for use, only about 0.32% of the earth's water can be tapped. This represents 112,000 km3, of which 90% (100,800 km3) is stored as groundwater. Therefore, only a volume of 11,200 km3 is available in lakes, rivers and swamps" [1].The inland water bodies occupy a small percentage of land area. Most of these ecosystems are natural, but some are the result of human intervention, especially for generating electrical energy.Most water bodies contain plant and animal biodiversity, including some orders of aquatic insects, that live there throughout their whole lives (beetles, bugs) or during only one part of it (for example, the larval stage of Odonata, Ephemeroptera, Trichoptera, Megaloptera, etc.). Beetles are the most abundant and diverse organisms within the Class Insecta [2]. Ratcliffe [3] states that, of the 1,750,000 species of living beings on the planet, 350,000 are beetles. This means that one in every five living beings is a beetle.Like many other orders of insects in Mexico and throughout the world, many beetles, including some aquatic species of Coleoptera, are ingested by humans. They are also part of the food chain of different organisms.'INSECTS AS A SOURCE OF PROTEIN IN THE FUTURE' is research area that we have developed and investigated over many years at the Institute of Biology of the National Autonomous University of Mexico (UNAM). We studied the insect species that are eaten in Mexico, where we have recorded 549 species to date [4]. Various aspects of anthropoentomophagy (ingestion of insects by humans) have been investigated in Mexico [4-23], as well as in c
Statistical and Physical Analysis of the External Factors Perturbation on Solar Radiation Exergy
Juan Carlos Moreno,Javier Ca?ada,José Vincente Boscà
Entropy , 2003, DOI: 10.3390/e5050452
Abstract: The purpose of this paper is to analyze the external factor perturbations on solar radiation. Firstly, the influence on the photon distribution function in the space of frequencies is analyzed and, later, the modification generated in equations of internal energy, entropy, and radiation is viewed in order to deduce an expression to calculate the spectral exergy of perturbed radiation.
El pensamiento del profesorado en educación física ante la cesión de responsabilidad en la evaluación del alumnado
José Antonio Vera Lacárcel,Juan Antonio Moreno Murcia
Abstract: Este estudio se centró en indagar en el pensamiento del profesorado que impartía el área de educación física en ense anza primaria acerca de la utilización de estrategias de cesión de responsabilidad en la evaluación del alumnado. Para ello, se entrevistaron a 10 maestros y 8 maestras, de edades comprendidas entre los 31 y los 38 a os, con una experiencia mínima de 7 a os de docencia en el área. Las entrevistas tuvieron una duración entre 40 y 45 minutos. Los resultados mostraron que la cesión de responsabilidad se percibía como la posibilidad de que el alumnado valoraba su progreso y mejoraba el conocimiento de sus habilidades físicas. Sin embargo, la desconfianza en los criterios del alumnado para realizar juicios de sus capacidades, la creencia de que la subjetividad contaminaba las valoraciones en el aprendizaje de las habilidades físicas, y la sensación de que un exceso de autonomía dificultaba el control del aula, se convirtieron en barreras que dificultaban la puesta en práctica de las estrategias y la planificación de tareas orientadas con tal fin.
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