oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

4 ( 1 )

2019 ( 15 )

2018 ( 35 )

2017 ( 42 )

Custom range...

Search Results: 1 - 10 of 22763 matches for " Eduardo Posadas Manzano "
All listed articles are free for downloading (OA Articles)
Page 1 /22763
Display every page Item
Recombinant protein detection and its content in total protein, lipids and toxic antinutritional substances in Mexican maize  [PDF]
Pe?a Betancourt Silvia Denise, Posadas Manzano Eduardo, Valladares Carranza Benjamín
Health (Health) , 2013, DOI: 10.4236/health.2013.510A1002
Abstract:

The engineering genetic technology has developed Bt maize events which contain recombinant protein that will be safe for the consumer. The aflatoxins are contaminants present in maize capable of producing cancer and decreasing the immune response in human, additionally contained polyphenols compounds considered non nutritive. The objective of this study was to identify the presence of recombinant protein in hybrid and local varieties of corn and evaluate the content of aflatoxins and tannins. 25 samples of white grain maize for human consumption were collected, 12 were for hybrid maize and 13 local varieties, from the states of Hidalgo, Mexico and Morelos. Samples were analyzed for Cry1Ab/Cry1Ac, using lateral flow strip method, crude protein and lipids by standard methods. Aflatoxins were assessed by comercial Elisa kit and tannins by spectroscopy method. The data were grouped in a completely random model and an analysis of variance was performed. The results indicated that 44.5% of hybrid corn was positive by Bt-Cry1Ab/1Ac proteins, containing 9.02% ± 2.5 lipids and 11.33% ± 2.2 crude protein, 189 ± 0.92 mg/g of tannins and 6.36 ± 3.3 μg·g-1 aflatoxins. The local maize samples (55.5%) were negative to Bt-Cry1Ab/ Cry1Ac, which protein content was of 8.68% ± 0.90, 6.14% lipids ± 2.3, 273 ± 0.40 mg/100g tannin and 7.15 ± 3.3 μg·g-1 of aflatoxins. In conclusion, we observed an improvement of nutrient composition in hybrid maize with Bt proteins, and decrease in tannins content comparing with some local varieties without Bt proteins. The

Estimation of Mycotoxin Multiple Contamination in Mexican Hybrid Seed Maize by HPLC-MS/MS  [PDF]
Silvia Denise Pe?a Betancourt, Benjamín Valladares Carranza, Eduardo Posadas Manzano
Agricultural Sciences (AS) , 2015, DOI: 10.4236/as.2015.69104
Abstract: In Mexico, the presence of mycotoxins in chemical treated seed maize by sowing is not well known, despite the need to improve the quality and corn safe for human consumption. It collected twenty-five genotypes maize samples from Morelos State in the spring of 2013, all of them treated with synthetic colors (pink, green, yellow), fungicides and insecticides. Two samples (synthetic seed and hybrid commercial) were selected for analysis of twenty-two mycotoxins by LC-MS/MS and AFB1 determination by liquid chromatography and fluorescence detection (HPLC-FLD). The results of the 25 samples showed the presence of Aflatoxin B1 in 25% of samples in a ranged concentration between 2 to 6 μg·kg-1, and average of 4.1-1 μg·kg, which were within the allowed limits by national and international legislation. Twenty-two mycotoxins were found in levels ranging between 791.7 and 891.2 μg·kg. The content average in both samples was for total aflatoxins (AFB1, AFB2, AFG1, AG2) of 16.95 μg·kg, with G aflatoxins the most prevalence. Twelve trichothecenes (Nivalenol, Neosolanol, Fusarenone X, DAS, HT-2, FB1, FB2, FB3, T-2, Zearalenone, ZEA2, ZEA3) were in a level of 292.7 μg·kg-1, Enniantine 8.6 μg·kg-1, Sterigmatocystin 6.5 μg·kg-1, Roquefortine C, 2.9 μg·kg-1. Ochratoxin 8.8 μg·kg-1 and Mycophenolic acid at 535 μg·kg-1 were the highest content. The synthetic color present in seeds analyzed inhibited a good purification in the extracted mycotoxin by optimizing the step in HPLC-MS/MS quantification system. The information generated in this
Tendencias en la consideración de la depreciación luminosa de las lámparas empleadas en alumbrado viario
Mockey Coureaux,Israel Omar; Manzano,Eduardo Roberto;
Ingenier?-a Energ??tica , 2013,
Abstract: the luminous output of the lamps in road lighting decreases at a rate that depends on the type of lamp, the ballast system and operating parameters. this cause of depreciation is considered from the design stage from the maintenance factor, once established maintenance program. this paper reviews the different sources of information available, while valuing the outcomes of the major investigations that have been used in recent times. it recognizes the data provided by lamp manufacturers as the most reliable source. technological advances introduced into the manufacturing process of these lamps in addition to extending its useful life also deliver higher lumen maintenance which potentially can increase the energy efficiency of these systems. in addition to other important advantages, leds has a good maintenance of their luminous flux the authors approach the trial elements and techniques for the use of curve fitting tool. mathematical models to predict this depreciation rate are offered.
La programación del mantenimiento del alumbrado viario y el impacto en su eficiencia energética;The road lighting maintenance schedule and the impact in their energy efficiency
Israel Omar Mockey- Coureaux,Eduardo Roberto - Manzano
Ingeniería Energética , 2011,
Abstract: Se presenta un estudio acerca de la influencia de las acciones de mantenimiento en las instalaciones de alumbrado viario. Se abordan los aspectos relacionados con las causas de depreciación de estos sistemas y las acciones de mantenimiento para su corrección. Se conceptualiza la eficiencia energética para el caso del alumbrado viario y se mencionan todos los aspectos relacionados con ello. Los autores llaman la atención acerca de que frecuentemente los análisis para incrementar la eficiencia de estos sistemas de alumbrado solo se centran en las posibilidades de cambio y mejoramiento de las lámparas, balastos, luminarias, así como las técnicas de regulación y control. En el artículo se hace énfasis en cómo a través del establecimiento del programa de mantenimiento que se defina se puede impactar en la eficiencia energética desde la etapa de dise o y durante su explotación, resaltando las potencialidades en esta vía poco estudiada hasta este momento.A study about maintenance actions influences in road lighting efficiency is presented. The aspects related with the causes of the luminous depreciation of road lighting systems and the maintenance actions are approached for their correction. The energy efficiency is conceptualized for the road lighting case and all the aspects can be impacted to increase it are mentioned. The authors emphasis stands out that attention that usually the analyses to increase the efficiency of these systems is frequently focused only on the possibilities of change and improvement of the lamps, ballasts, luminaries and the control and regulation techniques to increase the efficiency of road lighting. The paper analyses how through a maintenance schedule it can impact on the energy efficiency from the design stage and during their exploitation, standing out the potentialities in this way little studied until this moment.
Experiência de um programa de profilaxia medicamentosa coletiva da malária no sudeste do Pará, Brasil
Azevedo,Antonio Carlos de; Tauil,Pedro Luiz; Manzano,Eduardo; Manzano,Heloisa Lotufo; Tauil,Marta Campos;
Revista de Saúde Pública , 1972, DOI: 10.1590/S0034-89101972000300002
Abstract: a 35 week trial with a 4 aminoquinolinepyrimethamine association in colective oral prophylaxis of malaria in a farm in the amazon region, brazil, is reported. there, the disease is now in a hiperendemic status, threatening the development of the region. special characteristics of the disease in the region are studied and the barriers and advantages for such a prophylactic method are presented. the necessity of a very good management for mantaining high protection levels is stressed. the level of protection was mantained at nearly 75% of the population and the incidence of the disease fall from 40 clinical cases to circa 1.5 per 100 inhabitants. as this level of incidence of the disease, the development of rural activities in the region was perfectly possible.
Interacción entre defensas costeras artificiales en playas arenosas y perturbaciones naturales de gran escala: el terremoto del 27F de 2010 en la costa del centro-sur de Chile
Eduardo Jaramillo,Mario Manzano,Gonzalo Morales,Carlos Velásquez
Revista de Geografía, Norte Grande , 2012,
Abstract: Durante los a os 2010 y 2011, estudiamos los efectos del levantamiento costero producto del terremoto del 27F sobre el paisaje físico y la macrofauna de playas arenosas, ubicadas frente a defensas costeras artifi ciales en la península de Arauco y alrededores. El ancho promedio de las playas durante el periodo posterior al 27F fue hasta 12,5 veces mayor que los anchos observados antes del terremoto y la pendiente de las playas levantadas disminuyó. En playas que tenían defensas costeras ubicadas cerca del nivel de marea alta, el espacio restaurado en los niveles superiores y medios del intermareal (previamente ocupados por murallas y revestimientos rocosos), fue rápidamente colonizado por crustáceos que habitan niveles intermareales similares en playas sin defensas costeras artifi ciales. Estudios llevados a cabo luego de la ocurrencia de grandes perturbaciones, son relevantes para aumentar el conocimiento sobre las interacciones entre fenómenos naturales de gran escala y la infraestructura costera artificial.
Lipoatrofia semicircular: Nuestra experiencia dos a?os después (2007-2009)
Ortega Díaz de Cevallos,Antonio; Cuevas Moreno,Fernando; Aguado Posadas,Eduardo;
Medicina y Seguridad del Trabajo , 2009, DOI: 10.4321/S0465-546X2009000400004
Abstract: background and objectives: to describe and to analyze the clinical presentation and the evolution after variation of certain environmental factors, of our series of cases of semicircular lipoatrophy in job environment, with special attention to the resolution of the injury and to value the possible association with other patologies from the ethiologic point of view or if it could be part of a more complex syndrome. patients and method: workers attended between spring of 2007 and summer of 2009. in the first visit, we made a standardized history performing physical examination with measurement and location of the injury, laboratory parameters tests and ultrasonographic study of the presumptively affected zone. subsequently, after having been taken the measurements recommended in companies to eliminate the static electricity, quarterly controls are included with anamnesis, physical exploration and ultrasonographic comparatives. results: 96,7 % are women, without predominance of any age. they all work at desks with informatic material and abundant electric wired up. the locations, except for 3 cases (2 in arm and one in bottom region), were at the level of the anterolateral face of thighs and with average values of 69x20x73 cm. (heightxwidthxlength). evolvely 6 months later 93 % of cases was showing clinical remiss (62 % complete, 3l % partial); after one year only 2 cases have not showed any variation having a 69 % of complete resolutions. none of the cases has presented any other related pathology. in the first year of control there were 36 new cases, in the second one 22 and in what takes of the third one 4. conclusions: the clinical characteristics are superimposable on those of other published series as for manifestations, type of affected worker and predominance of presentation in women. as for the evolution once modified the job environment, the trend is evidently to the resolution, much faster than in the published former cases where the environment had not bee
Lipoatrofia semicircular: Nuestra experiencia dos a os después (2007-2009) Semicircular Lipoatrophy: Our experience two years later (2007-2009)
Antonio Ortega Díaz de Cevallos,Fernando Cuevas Moreno,Eduardo Aguado Posadas
Medicina y Seguridad del Trabajo , 2009,
Abstract: Fundamento y objetivos: Describir y analizar la presentación clínica y la evolución tras la corrección de determinados factores ambientales, de nuestra serie de casos de lipoatrofia semicircular en el entorno laboral, con especial atención a la resolución de la lesión y valorar la posible asociación con otras patologías desde el punto de vista etiológico o que pudieran formar parte de un síndrome más complejo. Pacientes y método: Trabajadores atendidos entre la primavera de 2007 y el verano de 2009. En la primera consulta se efectúa historia clínica detallada, con medición y localización de la lesión, realización de analítica y de ecografía de la zona supuestamente afecta. Posteriormente tras haberse tomado las medidas recomendadas en las empresas para eliminar la electricidad estática, se incluyen controles cada tres meses con anamnesis, exploración física y ecografía comparativas. Resultados: El 96,7% son mujeres, sin predominio de ninguna edad Todos trabajan en puestos con material informático y abundante cableado eléctrico. Las localizaciones, salvo 3 casos (2 en brazo y uno en región glútea), fueron a nivel de cara anterolateral de muslos y con valores medios de 69x20x73 cm. (altoxanchoxlargo). Evolutivamente a los 6 meses un 93% de casos mostraban remisión clínica (62% completa, 31% parcial); al a o solamente 2 casos no han mostrado ninguna variación habiendo un 69% de resoluciones completas. Ningún caso ha presentado otra patología relacionada. En el primer a o de control hubo 36 nuevos casos, en el segundo 22 y 4 en los 6 meses trascurridos del tercero. Conclusiones: Las características clínicas son superponibles a las de otras series publicadas en cuanto a manifestaciones, tipo de trabajador afecto y predominio de presentación en mujeres. En cuanto a la evolución una vez modificado el entorno laboral, es evidente la tendencia a la resolución, mucho más rápida que en los casos antiguamente publicados en los que no se modificaba el entorno, en una gran proporción de los casos. Además estas correcciones han demostrado una gran eficacia frenando la aparición de nuevos casos. No se han apreciado otras manifestaciones patológicas que las estrictamente propias de lipoatrofia segmentaria. Background and objectives: To describe and to analyze the clinical presentation and the evolution after variation of certain environmental factors, of our series of cases of semicircular lipoatrophy in job environment, with special attention to the resolution of the injury and to value the possible association with other patologies from the ethiologic point of view or
Leapfrogging the Scientific and Technological Gap: An Alternative National Strategy for Mastering the Future
Roger Posadas
Kasarinlan : Philippine Journal of Third World Studies , 1985,
Abstract: This paper dwells on the scientific and technological dimensions of the national crisis. It argues that the present crisis is a symptom of the underlying, systemic weaknesses in society. These weaknesses refer to our country’s scientific and technological backwardness, dependence on foreign technologies and capital, and its subordination to foreign dominance, exploitation and control. Locked in the international division of labor, the Philippines has played the role of the exporter of primary commodities and importer of production technologies. Accordingly, based on the nation’s economic history, it is the acceptance of the international division of labor that has perpetuated and worsened the underdevelopment of our economy. Assessing our cycle of backwardness and dependence, the nature of science and technology, technological innovations and technological potentials as nuanced in the Philippine context, the paper maps our country’s stages of technological capabilities. Despite achievements in agriculture, industry and health during the past few years, the problem remains that we do not yet have genuine endogenous industries in chemicals, metals, pharmaceuticals, automotives and electronics. The Philippines, once at par with other countries in Southeast Asia and East Asia in scientific and technological development, is now lagging behind most of its neighbors. The inadequate government support and the lack of an effective economic demand for local innovations are seen as reasons for the slow development. The national strategy the paper proposes is technological leapfrogging. As a strategy, it attempts to liberate the country from dependence and backwardness by importing selected high technologies in order to acquire adaptive, replicative, and innovative mastery of these advanced technologies. More importantly, the paper argues that it is this strategy, geared towards national technological mastery, which provides a long-range vision for designing, building and insuring of the nation’s future in the 21st century.
Integra??o dos servi?os de saúde a nível periférico: experiência da comunidade da Amaz?nia, Brasil
Azevedo,Antonio Carlos de; Gramacho,Doris; Manzano,Eduardo; Manzano,Heloisa Lotufo; Tauil,Marta Campes; Tauil,Pedro Luiz;
Revista de Saúde Pública , 1973, DOI: 10.1590/S0034-89101973000400009
Abstract: five years of experience with comprehensive health care, based in periferal integration of services in a 10000 inhabitants community in amazon region, brazil is presented. the need for integration of health care is stressed with some references in literature. the periferal integration of health services through a multiprofessional group practice as a lesser alternative when complete central integration, is unattainable.
Page 1 /22763
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.