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Search Results: 1 - 10 of 6985 matches for " Velásquez-Valle "
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Incidencia y sintomatología de cinco virus en parcelas comerciales de chile seco en Aguascalientes, San Luis Potosí y Zacatecas, México
Velásquez-Valle, Rodolfo;Reveles-Torres, Luis Roberto;Mena-Covarrubias, Jaime;
Revista mexicana de ciencias agrícolas , 2012,
Abstract: world-wide the chili pepper crop is affected by more than 60 viral diseases, although very little is known about them in the area of dry pepper plantation in northern-central mexico. consequently, the aims of this work were to identify the presence of the virus and the associated symptoms in commercial dry pepper fields of the states of zacatecas, san luis potosí, and aguascalientes, mexico. mirasol and ancho pepper plants were sampled and the presence of symptoms such as dwarfing, chlorosis, leaf deformation, defoliation, vascular necrosis and joined branches, were recorded. samples were analyzed using das-elisa with the antisera of the tobacco mosaic virus (tobacco mosaic virus: tmv), cucumber mosaic virus (cucumber mosaic virus: cmv), potato virus y (potato virus y: pvy), pepper mottle virus (pepper mottle virus: pepmov), and tobacco etch virus (tobacco etch virus: tev). these viruses were identified in pepper plants collected in dry pepper fields located in the three states mentioned earlier.
Incidencia y sintomatología de cinco virus en parcelas comerciales de chile seco en Aguascalientes, San Luis Potosí y Zacatecas, México Incidence and symptomatology of five viruses in commercial dry chili pepper fields in Aguascalientes, San Luis Potosí, and Zacatecas, Mexico
Rodolfo Velásquez-Valle,Luis Roberto Reveles-Torres,Jaime Mena-Covarrubias
Revista mexicana de ciencias agrícolas , 2012,
Abstract: A nivel mundial el cultivo de chile es afectado por más de 60 enfermedades virales; sin embargo, poco se conoce acerca de ellas en el área productora de chile seco del norte centro de México por lo que el objetivo del presente trabajo consistió en detectar la presencia y sintomatología de cinco virus en parcelas comerciales de chile seco en los estados mencionados. Plantas de chile de los tipos mirasol y ancho fueron muestreadas y se anotó la presencia de síntomas como enanismo, clorosis, deformación de hojas, defoliación, necrosis vascular y ramas unidas. Las muestras fueron analizadas mediante la técnica DAS-ELISA empleando los antisueros para el virus del mosaico del tabaco (Tobacco mosaic virus: TMV), mosaico del pepino (Cucumber mosaic virus: CMV), Y de la papa (Potato virus Y: PVY), moteado del chile (Pepper mottle virus: PepMoV) y jaspeado del tabaco (Tobacco etch virus: TEV). Esos virus fueron identificados en plantas de chile colectadas en las parcelas comerciales de chile seco de los tres estados antes mencionados. World-wide the chili pepper crop is affected by more than 60 viral diseases, although very little is known about them in the area of dry pepper plantation in northern-central Mexico. Consequently, the aims of this work were to identify the presence of the virus and the associated symptoms in commercial dry pepper fields of the states of Zacatecas, San Luis Potosí, and Aguascalientes, Mexico. Mirasol and ancho pepper plants were sampled and the presence of symptoms such as dwarfing, chlorosis, leaf deformation, defoliation, vascular necrosis and joined branches, were recorded. Samples were analyzed using DAS-ELISA with the antisera of the tobacco mosaic virus (Tobacco mosaic virus: TMV), cucumber mosaic virus (Cucumber mosaic virus: CMV), potato virus Y (Potato virus Y: PVY), pepper mottle virus (Pepper mottle virus: PepMoV), and tobacco etch virus (Tobacco etch virus: TEV). These viruses were identified in pepper plants collected in dry pepper fields located in the three states mentioned earlier.
"CEZAC 06": nueva variedad de ajo tipo Jaspeado para la región norte centro de México
Reveles-Hernández, Manuel;Velásquez-Valle, Rodolfo;Alvarado Nava, María Dolores;Rubio-Díaz, Salvador;
Revista mexicana de ciencias agrícolas , 2011,
Abstract: about 5 200 hectares of garlic are cultivated in mexico; the north-central region is one of the main producing areas of this vegetable. the lack of locally adapted varieties of garlic is a serious disadvantage for garlic producers. in this paper are mentioned the main agronomic characteristics of "cezac 06", a new garlic variety available for producers of zacatecas, aguascalientes, durango, chihuahua and coahuila. the main advantages of this variety are higher yield, consistently round bulbs, fewer numbers of cloves per bulb and homogeneous maturation. in commercial plots, yield has improved in 9-17% and there have been achieved yields of up to 30 t ha-1 using "cezac 06".
"CEZAC 06": nueva variedad de ajo tipo Jaspeado para la región norte centro de México "CEZAC 06": new Jaspeado garlic cultivar for the northem-central region of Mexico
Manuel Reveles-Hernández,Rodolfo Velásquez-Valle,María Dolores Alvarado Nava,Salvador Rubio-Díaz
Revista mexicana de ciencias agrícolas , 2011,
Abstract: Alrededor de 5 200 hectáreas de ajo son cultivadas en México donde la región norte centro, es una de las principales áreas productoras de esta hortaliza. La falta de variedades de ajo localmente adaptadas es una seria desventaja para los productores de ajo. En este reporte se mencionan las principales características agronómicas de "CEZAC 06", una nueva variedad de ajo disponible para los productores de los estados de Zacatecas, Aguascalientes, Durango, Chihuahua y Coahuila. Las principales ventajas de esta variedad son rendimientos más altos, bulbos consistentemente redondos, menor número de dientes por bulbo y maduración homogénea. En parcelas comerciales el rendimiento se ha mejorado en 9-17% y se han alcanzado rendimientos de hasta 30 t ha-1 con el uso de "CEZAC 06". About 5 200 hectares of garlic are cultivated in Mexico; the north-central region is one of the main producing areas of this vegetable. The lack of locally adapted varieties of garlic is a serious disadvantage for garlic producers. In this paper are mentioned the main agronomic characteristics of "CEZAC 06", a new garlic variety available for producers of Zacatecas, Aguascalientes, Durango, Chihuahua and Coahuila. The main advantages of this variety are higher yield, consistently round bulbs, fewer numbers of cloves per bulb and homogeneous maturation. In commercial plots, yield has improved in 9-17% and there have been achieved yields of up to 30 t ha-1 using "CEZAC 06".
Presencia de Circulifer tenellus Baker y Beet mild curly top virus en maleza durante el invierno en el centro norte de México Circulifer tenellus Baker and Beet mild curly top virus presence in weeds during the winter in north-central Mexico
Rodolfo Velásquez-Valle,Luis Roberto Reveles-Torres,Mario Domingo Amador-Ramírez,María Mercedes Medina-Aguilar
Revista mexicana de ciencias agrícolas , 2012,
Abstract: Una de las enfermedades más importantes del chile para secado en el norte centro de México es la denominada amarillamientos del chile. Existe poca información acerca de la interacción entre el vector (Circulifer tenellus Baker), el Beet mild curly top virus y la maleza durante el invierno en esta región, consecuentemente el objetivo del trabajo fue identificar maleza de invierno que sirve como refugio para el vector y hospedero del virus en esta región. Entre enero y marzo de 2011 se muestrearon 26 manchones de maleza en los estados de Aguascalientes y Zacatecas. Se capturaron adultos de C. tenellus en 69.2% de los manchones de maleza muestreados; la mayoría (75.5%) de los especímenes eran hembras. El Beet mild curly top fue identificado sólo 15.4% de los sitios de muestreo infectando especies de maleza como Eruca sativa, Reseda sp., Chenopodium sp. y Solanum rostratum L. One of the most important diseases of chili pepper for drying in the north-central Mexico is called yellowing of chili. There is little information about the interaction between the vector (Circulifer tenellus Baker), the Beet mild curly top virus and weeds during the winter in this region; therefore, the objective was to identify winter weeds that serve as are fuge for the vector and host of the virus in this region. Between January and March, 2011, 26 patches of weed were sampled in Aguascalientes and Zacatecas. Adult C. tenellus were captured in 69.2% of the weed sampled patches; most of the specimens were females (75.5%). Beet mild curly top was identified in only 15.4% of the sampling sites, infecting weed species suchas Eruca sativa, Reseda sp., Chenopodium sp. and Solanum rostratum L.
Microorganismos Benéficos Asociados a Meloidogyne incognita (Kofoid y White) Chitwood en Guayabo (Psidium guajava L.) de Calvillo, Aguascalientes, México
Gallegos-Morales, Gabriel;Cepeda-Siller, Melchor;Hernández-Castillo, Francisco Daniel;Acosta-Zamarripa, Ana María;Velásquez-Valle, Rodolfo;González-Gaona, Ernesto;Sánchez-Yánez, Juan Manuel;
Revista mexicana de fitopatología , 2009,
Abstract: the root-knot nematode species meloidogyne incognita was identified as the one species that parasites guava orchards in the calvillo region (aguascalientes, mexico). beneficent fungi and bacteria were isolated as well, associated to soil and roots collected from the cerro blanco, mesa grande, la labor and malpaso locations. twenty different meloidogyne sp., samples were identified taking adult female perinea pattern characteristics into account, as well as the male anterior region observation. the meloidogyne incognita species was identified in all the samples. the isolated beneficent microorganisms and associated to guava rhizosphere with a potential use in biological control, belong to the bacillus cereus, b. subtilis b. megaterium and paecilomyces farinosus species. furthermore, the rhabditis and mononchus soil nematodes were identified in the samples.
Mapping soil fractal dimension in agricultural fields with GPR
K. Oleschko, G. Korvin, A. Mu oz, J. Velazquez, M. E. Miranda, D. Carreon, L. Flores, M. Martínez, M. Velásquez-Valle, F. Brambila, J.-F. Parrot,G. Ronquillo
Nonlinear Processes in Geophysics (NPG) , 2008,
Abstract: We documented that the mapping of the fractal dimension of the backscattered Ground Penetrating Radar traces (Fractal Dimension Mapping, FDM) accomplished over heterogeneous agricultural fields gives statistically sound combined information about the spatial distribution of Andosol' dielectric permittivity, volumetric and gravimetric water content, bulk density, and mechanical resistance under seven different management systems. The roughness of the recorded traces was measured in terms of a single number H, the Hurst exponent, which integrates the competitive effects of volumetric water content, pore topology and mechanical resistance in space and time. We showed the suitability to combine the GPR traces fractal analysis with routine geostatistics (kriging) in order to map the spatial variation of soil properties by nondestructive techniques and to quantify precisely the differences under contrasting tillage systems. Three experimental plots with zero tillage and 33, 66 and 100% of crop residues imprinted the highest roughness to GPR wiggle traces (mean HR/S=0.15), significantly different to Andosol under conventional tillage (HR/S=0.47).
ética y bioética en la formación del profesional de enfermería, una necesidad para la vida Ethics and bioethics in the training of nursing personnel, a lifelong need
Maritza Peinado Moreno,Bertha M Lorenzo Velásquez,María Valle Hernández,Karelia Zubizarreta Peinado
Revista de Ciencias M??dicas de Pinar del R?-o , 2005,
Abstract: Literalmente Bioética es un neologismo que significa ética de la vida y surge en la década del 70, en la enciclopedia se define como el estudio sistemático de la conducta humana en el campo de las ciencias biológicas y de la atención de salud. Se realizó un estudio prospectivo longitudinal y descriptivo para determinar el nivel de conocimiento que tienen los estudiantes de curso complementario en el curso 03-04 todos del municipio Pinar del Río; donde se les aplicó una encuesta antes y después de implementar el programa correspondiente a la asignatura de ética y Bioética en Enfermería. Los principales indicadores a medir fueron conocimientos previos a través de cursos básicos y de especialización, vínculo de los conocimientos teóricos con la actividad práctica, así como criterios de los estudiantes respondiendo a diferentes indicadores se utilizó el método porcentual aritmético presentándose los resultados en tablas. Los contenidos y las diferentes formas satisfacen las necesidades de los patrones morales de la sociedad en el ejercicio de la profesión, se hace necesario brindar educación continuada en los aspectos éticos y reflexionar sobre la importancia del cumplimiento de los principios éticos y bioéticos con vistas a reforzar un marco de valores que deben regir la filosofía de la profesión. Bioethics is a neologism that means ethics for life and it theory was founded during the 70's; in the Encyclopedia it is defined as the systematic study of the human behaviour in the field of Biological Sciences and Health Care. A longitudinal-prospective and descriptive study was carried out to determine level of knowledge developed by the students of the complementary course during the academic course 2003 _ 2004 in Pinar del Rio Municipality, conducting a survey before and after the implementation of the syllabus corresponding to Ethics and Bioethics subjects in Nursing School. The main indicators of the study were: previous knowledge through basic courses and courses of specializations, linking of theory and practical activity, as well as student's criteria according to different points. Arithmetical percentage method was used and results were charted. It is necessary to follow a continuous education in ethical practice and reinforce ethical and bioethical principles.
Gérmenes encontrados en pacientes con pie diabético en el Hospital Naval de Talcahuano periodo 2002-2004
Fernando A. Tirapegui Sanhueza,Critóbal Alfredo Davanzo Castillo,Emilia Caterina Crovo Valle,Alfonso Velásquez
CIMEL. Ciencia e Investigación Médica Estudiantil Latinoamericana , 2005,
Abstract:
Invarianza temporal al escalado de series de tiempo con información pluvimétrica diaria Temporal invariance to scaling of time series of daily rainfall data
Miguel Agustín Velásquez Valle,Jaime de Jesús Velásquez García,Jesús Arcadio Mu?oz Villalobos,Mario Roberto Martínez Menes
Revista mexicana de ciencias agrícolas , 2010,
Abstract: La variación en magnitud de los eventos de precipitación pluvial se debe a la ocurrencia de estaciones secas, húmedas y fenómenos extremos. El objetivo de esta investigación, fue determinar el grado de invarianza al escalado (diferente escala) de una series de tiempo de precipitación pluvial, por medio del análisis fractal. Se utilizó la serie histórica de precipitación de 1978 a agosto de 1996 de la estación meteorológica Santa Fé de la Laguna, Quiroga, Michoacán, México. Se elaboraron bases de datos a escala diaria, mensual y anual; se calculó el coeficiente de Hurst con los métodos de referencia de ondoletas y el de rango re-escalado dise ados para el análisis de patrones auto-afines. Se determinó la aleatoriedad de los eventos, la invarianza al escalado y la distribución dinámica de los eventos. Variation in magnitude of events of pluvial precipitation is due to occurrence of dry season, humid season and extreme phenomena. The aim of this investigation was to determine invariance grade at scaling (at different scale) of a series of time of pluvial precipitation, by means of fractal analysis. It was used historical precipitation series from 1978 to August of 1996 from meteorological station Santa Fé de la Laguna, Quiroga, Michoacán, Mexico. Databases were elaborated at daily, monthly and annual scale; the coefficient of Hurst was calculated with the reference methods of wavelets and with re-scaled range designed for the analysis of self-affine patterns. The randomness of events, the invariance to scaling was determined and the dynamic distribution of the events.
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