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Search Results: 1 - 10 of 534564 matches for " José de Jesús;Sosa Ramírez "
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Adaptaciones morfológicas foliares en tomate cultivado en bioespacio de techo retráctil con clima cálido Morphological leaf adaptations in tomato grown in warm retractable-roof bio-space
Jorge Berni Medina Medina,José de Jesús Luna Ruíz,Joaquín Sosa Ramírez,Onésimo Moreno Rico
Revista mexicana de ciencias agrícolas , 2012,
Abstract: Se analizaron las condiciones microclimáticas y la morfologíafoliar de tomate indeterminado de dos bioespacios: invernadero de techo retractil y casa sombra en Culiacán, Sinaloa, México; durante el periodo 2009 a 2010. Los resultados muestran que el invernadero de techo retractil, genera condiciones más favorables para la fotosíntesis, como resultado de una menor fluctuación térmica al interior de este bioespacio, en comparación con el ambiente impuesto por la casa sombra. Las temperaturas extremas (máximas y mínimas) al interior del invernadero de techo retractil, se mantuvieron en un rango significativamente menor y por lo tanto, más favorable para la producción y la estabilidad reproductiva de tomate en el clima cálido de Culiacán, en comparación con casa sombra. Lo anterior fue corroborado por la magnitud de las variables morfológicas foliares analizadas y las diferencias detectadas entre foliolos desarrollados en ambos casos. Los valores de índice de área foliar, grosor de hoja, longitud del parénquima en empalizada y presencia de doble parénquima empalizada, observados en plantas desarrolladas en invernadero de techo retractil, superaron significativamente a los valores observados en casa sombra. Los resultados permiten concluir que los mayores rendimientos de tomate reportados recientemente para invernadero de techo retractil en climas cálidos, se deben en gran parte a la mayor eficiencia fotosintética, que resulta de las modificaciones y adaptaciones morfológicas foliares al microclima impuesto por el invernadero de techo retractil. Estos resultados apoyan la visión del manejo agronómico innovador, para la búsqueda por acondicionarlos espacios para la expresión de la vida. El concepto científico de bioespacio para la producción vegetal bajo sistemas de agricultura protegida, es fundamental para proponer medidas de adaptación ante el cambio climático. Microclimatic conditions and indeterminate tomato leaf morphology of two bio-spaces were analyzed: retractable-roof greenhouse and shade-house in Culiacán, Sinaloa, Mexico, during the period 2009 - 2010. The results show that, the retractable-roof greenhouse generates more favorable conditions forphotosynthesis, as a re sult of lower thermal fluctuation within this bio-space, compared with the environment imposed by the shade-house. Extreme temperatures (maximum and minimum) into the retractable-roof greenhouse remained in a range significantly smaller and therefore more favorable for the production and reproductive stability of tomato in the warm weather of Culiacán, comparedto shade-house s. This w
Ordenamiento ecológico comunitario: un modelo de manejo de recursos naturales para el desarrollo comunitario. Estudio de caso ejido Potrero de los López, Aguascalientes
Meraz Jiménez, Antonio de Jesús;Galarza Mendoza, José Luis;Sosa Ramírez, Joaquín;Ponce Montoya, Amalio;Torres González, Jorge Alejandro;
Revista Chapingo. Serie ciencias forestales y del ambiente , 2011, DOI: 10.5154/r.rchscfa.2010.11.044
Abstract: natural resource management based on participatory community-based environmental management (pcem) is a support tool to implement rural development projects at the community level, from a regional planning framework through the use and application of technical tools to analyze the potentials and limits of natural resources and the use of a methodology to drive participatory processes. management elements and production processes were characterized and defined using landform, land use and vegetation through field samplings of 1000 m2 plots for forests and 1 m2 ones for pasturelands, validated by sub-supervised spot image classification and the edaphological conditions proposed by inegi (1978). through participatory planning workshops conducted in 2006, the results of the technical analysis were compared and validated and the community proposals were identified. among the strategic guidelines are: appropriate livestock, agricultural, forestry and ecotourism uses; conservation, reconstruction of water bodies; and restoration of degraded ecosystems, which is based on taking decisions such as establishing buffer zones between use areas and conservation areas where the original ecosystem remains.
Adaptaciones morfológicas foliares en tomate cultivado en bioespacio de techo retráctil con clima cálido
Medina Medina, Jorge Berni;Luna Ruíz, José de Jesús;Sosa Ramírez, Joaquín;Moreno Rico, Onésimo;Perales Segovia, Catarino;
Revista mexicana de ciencias agrícolas , 2012,
Abstract: microclimatic conditions and indeterminate tomato leaf morphology of two bio-spaces were analyzed: retractable-roof greenhouse and shade-house in culiacán, sinaloa, mexico, during the period 2009 - 2010. the results show that, the retractable-roof greenhouse generates more favorable conditions forphotosynthesis, as a re sult of lower thermal fluctuation within this bio-space, compared with the environment imposed by the shade-house. extreme temperatures (maximum and minimum) into the retractable-roof greenhouse remained in a range significantly smaller and therefore more favorable for the production and reproductive stability of tomato in the warm weather of culiacán, comparedto shade-house s. this was corroborated by the magnitude of leaf morphological variables analyzed and the differences detected between leaflets developed in both cases. the values of leaf area index, leaf thickness, length of palisade parenchyma and presence of double palisade parenchyma observed in plants grown under retractable-roof made of glass were significantly higher than the values observed in the shade-house. the results suggested that higher tomato yields recently reported retractable-roof greenhouse in warm climates are due in large part to the higher photosynthetic efficiency, resulting from the amendments and foliar morphological adaptations imposed by the retractable-roof greenhouse' s microclimate. these results support the vision of innovative agricultural management to put the search space for the expression of life. the scientific concept of bio-space for crop production under protected agriculture systems is essential to propose adaptation measures to climate change.
Mexican Guidelines for the Diagnosis and Treatment of Chronic Myeloid Leukaemia  [PDF]
Eduardo Cervera, Federico Godínez, Rosa Sosa, Ramón Rivas, Carlos Best, Juan Hernández, Adrián Morales, Hugo Zurita, Ivette Carrasco, Jorge Cruz, álvaro Aguayo, José Espinoza, Juan Labardini, Luis Valero, Judith Cruz, Diana Arcos, Diego Limón, Omar López-Navarro, Daniela Gordillo-Bastidas, Myrna Candelaria, Francisco Torres, Juan Kassack, Oscar de Jesúsrez Ramírez, Jorge Aquino, Guillermo Díaz, Mariela Cardiel, Margarita Rodríguez, Patricia Montoya, Juan Contreras, María Chávez, Sandra Chávez, David Gómez, Olga Cantú, Jorge Duque, Luis Pita, Eduardo Lobato, Julio López, Antonio López, Pedro González, Jorge Cortés
Journal of Cancer Therapy (JCT) , 2013, DOI: 10.4236/jct.2013.43092

Background: This document includes recommendations and guidelines issued by a group of Mexican researchers and specialists gathered in the First National Colloquium for the Diagnosis and Management of Chronic Myeloid Leukaemia (CML) by initiative of Instituto Nacional de Cancerología and with the support of the Leukaemia Department of the MD Anderson Cancer Center. Mexico lacks of updated information taken from its own reality on the diagnosis and treatment of CML and other haematological disorders; besides, there are no national guidelines. Aim: To publish a consensus document with guidelines for the management of CML adjusted to the national environment and overall characteristics. Method: The participants answered a DELPHI questionnaire about the overall aspects of the disease, aiming to target controversial topics, discuss them in the colloquium, and to agree on the best ones. After those meetings, a final document was drawn up. Results: The group presents recommendations for definition, diagnosis, prognosis, monitoring, and treatment of CML in Mexico. Conclusions: Having consensus guidelines for the clinical management of CML in our country will enable the consensual practice of Mexican specialists regarding the clinical approach to CML, as well as optimize the resources which allow the rational planning of the medical care strategies.

Archivos de neurociencias (México, D.F.) , 2004,
Abstract: objective: to show the economical advantages of microdiscectomy vs conventional standard discectomy clinical materials and methods; from april 2001 to august 2002, 6 patients underwent microdiscectomy and 12 patients standard discectomy. results: 18 patients were included as a total in the present paper, there was a male predominance, the patients that underwent microdiscectomy were younger than the standard procedure. there was a reasonable economical saving in the total cost for the microsurgery group, including direct medical costs and indirect costs. conclusions: this paper clearly shows that the microsurgery discectomy offers a reasonable economical saving not only for the patient but, for hospitals too. it requires less surgical materials, shorter hospital stay and a hortened interval before return to previous activity.
Formación para la nueva gerencia PUBLICA
José de Jesús Ramírez,Ernesto Navarro
Academia : Revista Latinoamericana de Administración , 1999,
Ab Initio Molecular Orbital Calculation for Optical and Electronic Properties Evaluation of Small and Medium Size Silicon Nano-Clusters Found in Silicon Rich Oxide Films  [PDF]
Néstor David Espinosa Torres, José Francisco Javier Flores Gracia, José Alberto Luna López, Juan Carlos Ramírez García, Alfredo Morales Sánchez, José Luis Sosa Sánchez, David Hernández de la Luz, Francisco Morales Morales
Journal of Modern Physics (JMP) , 2013, DOI: 10.4236/jmp.2013.411A2001

In systems in atomic and nano scales such as clusters or agglomerates constituted of particles from a few to less than one hundred of atoms, quantum confinement effects are very important. Their optical and electronic properties are often dependent on the size of the systems and the way in which the atoms in these clusters are bonded. Generally, these nano-structures display optical and electronic properties significantly different of those found in corresponding bulk materials. Silicon agglomerates found in Silicon Rich Oxide (SRO) films have optical properties, which have reported as depended directly on nano-crystal size. Furthermore, the room temperature photoluminescence (PL) of Silicon Rich Oxides (SRO) has repeatedly generated a huge interest due to their possible applications in optoelectronic devices. However, a plausible emission mechanism has not yet widespread acceptance of the scientific community. In this research, we employed the Density Functional Theory with a functional B3LYP and a basis set 6 - 31G* to calculate the optical and electronic properties of small (six to ten silicon atoms) and medium size clusters of silicon (constituted of eleven to fourteen silicon atoms). With the theoretical calculation of the structural and optical properties of silicon clusters, it is possible to evaluate the contribution of silicon agglomerates in the luminescent emission mechanism experimentally found in thin SRO films.

Characteristics of Toxic Waste from Nine Casting Industries According to Mexican Standards: Prospective Study of West Mexico  [PDF]
Walter Ramírez-Meda, José de Jesús Bernal-Casillas, Luis Alberto López-Tejeda, Gilberto í?iguez-Covarrubias
Journal of Geoscience and Environment Protection (GEP) , 2017, DOI: 10.4236/gep.2017.53004
Abstract: This research analyzed nine casting industries located in western Mexico and their waste streams, including slags, sand, dust and sludge. All of these are considered dangerous by Mexican Legislation due to their concentrations of heavy metals. Analytical results show that lead is the main problem in these wastes. Field sampling showed that these industries do not have any protocol for waste handling and storage.
Composting of Food and Yard Wastes under the Static Aerated Pile Method  [PDF]
Gilberto í?iguez-Covarrubias, Rodrigo Gómez-Rizo, Walter Ramírez-Meda, José de Jesús Bernal-Casillas
Advances in Chemical Engineering and Science (ACES) , 2018, DOI: 10.4236/aces.2018.84019
Abstract: This work presents the results that were obtained in a commercial composting plant where food (149,690 kg) and yard wastes (144,520 kg) were used as raw materials for its stabilization under the aerated static pile (ASP) method as an alternative to the mechanically mixed windrow method to solve problems of flies and odor nuisance complaints. In a pile of approximately 498 m3, the change in temperature was the main parameter that was evaluated during 49 days of positive forced aeration. Subsequently, a part of the material of the ASP (62 m3) was subjected to a curing period for 44 days recording changes in temperature and humidity. The results of carbon dioxide and volatile ammonia emissions analyses (NH3) and of a bioassay to screen for the presence of phytotoxic conditions showed a very mature compost with an emergence > 90% and a seedling vigor > 95%.
Performance Comparison among Trained Judges and Panels for the Evaluation of “Cuajada” Type Fresh Cheese in Two Regions from Oaxaca in México  [PDF]
Lorena Guadalupe Ramón Canul, Emmanuel de Jesús Ramírez Rivera, Rodrigo Santiago Cabrera, Fátima Karina Delgado Vidal, José Manuel Juárez Barrientos, María Hernández Cervantes, Juliana López Velázquez, Tania Gómez Alvarado
Food and Nutrition Sciences (FNS) , 2011, DOI: 10.4236/fns.2011.210156
Abstract: Four “cuajada” type fresh cheeses were evaluated by two trained panels in different regions from Oaxaca in Mexico (Instituto Tecnológico de Comitancillo (ITC) and Universidad del Mar (UMAR)). Each panel was integrated by six judges. Analysis of variance (ANOVA) in conjunction with principal component analysis (PCA) and the Rv coefficient were used to identify similarities and consensus among trained judges and panels. The ANOVA results revealed that the judges from ITC performed significantly better (P < 0.05) in discrimination and repetitivity, while both panels showed a similar effect in discrimination. The PCA determined some similarities in the position of cheeses in the sensory space, while Rv revealed that judges and panels were consensual. In conclusion, statistical resources determined that both panels were discriminating and that similarities in the positioning of cheeses in the sensory space were found.
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