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Search Results: 1 - 10 of 14763 matches for " Rodolfo;Reveles-Torres "
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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.
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.
Evaluación de cambios cognitivos de conceptos de Ecología, en estudiantes de nivel secundaria en México
Torres Ochoa, Sergio Rodolfo;
Revista electrónica de investigación educativa , 2008,
Abstract: this study was made from a random sample of students of secondary school (basic education), in urban an rural schools of the public sector of the state of michoacán, mexico. significant cognitive changes of basic concepts of ecology, during the whole academic year were assessed in each one of the three grades which conform this level of education. for such purpose, a group of six fundamental and four complementary concepts was used with which a core concept diagram was elaborated. from this diagram, a 23 task questionnaire was designed and applied as conceptual assessment instrument. the general results show that there are no significant differences, statistically speaking, between the beginning and the end of the academic year, regarding the principal ecology concepts and other related concepts that were assessed as well. this study included an interpretative phase based in conceptual maps, which results are not included in this article.
A diversidade regional e o dilema do modelo regulatório na telefonia fixa do Brasil
Rodolfo Torres dos Santos
Nova Economia , 2004,
Abstract: This paper evaluates the regulatory model of the Brazilian telecommunication sector, presenting some explanations for the potential financial crisis of its major companies. Telephone companies declare that their low profitability is due to the regulatory model. In spite of the coherence of analysis among the main telecom sector players, there are multiple alternative solutions to this dilemma. This paper discusses the risks involved in some of these options for reforming the telecommunication regulation model. The major conclusion is that different regions characterize different telecommunications markets and require different regulatory models. Thus, there is no single model capable of dealing with the regional disparities in this sector and their specific needs.
Sobolev space estimates for a class of bilinear pseudodifferential operators lacking symbolic calculus
Frederic Bernicot,Rodolfo Torres
Mathematics , 2010,
Abstract: The reappearance of a sometimes called exotic behavior for linear and multilinear pseudodifferential operators is investigated. The phenomenon is shown to be present in a recently introduced class of bilinear pseudodifferential operators which can be seen as more general variable coefficient counterparts of the bilinear Hilbert transform and other singular bilinear multipliers operators. The unboundedness on product of Lebesgue spaces but the boundedness on spaces of smooth functions (which is the exotic behavior referred to) of such operators is obtained. In addition, by introducing a new way to approximate the product of two functions, estimates on a new paramultiplication are obtained.
Characterization of compactness of the commutators of bilinear fractional integral operators
Lucas Chaffee,Rodolfo H. Torres
Mathematics , 2014,
Abstract: The compactness of the commutators of bilinear fractional integral operators and point-wise multiplication, acting on products of Lebesgue spaces, is characterized in terms of appropriate mean oscillation properties of their symbols. The compactness of the commutators when acting on product of weighted Lebesgue spaces is also studied.
"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".
Para una lectura iconotextual de Farabeuf de Salvador Elizondo
Patricia Reveles
Trans : Revue de Littérature Générale et Comparée , 2007,
Abstract: L’objectif de ce travail est de montrer comment Farabeuf, roman du mexicain Salvador Elizondo,invite à réaliser une lecture à partir aussi bien des éléments visuels intégrés dans le texte, que de ceux auxquels le texte fait référence. Divisé en trois parties, l’article repère les éléments paratextuels et intertextuels présents dans l’oeuvre, afin de souligner l’importance des relations intermédiaires et iconotextuelles en tant que point de départ pour une lecture spécifique. El objetivo del presente trabajo es mostrar cómo en Farabeuf, el novelista mexicano Salvador Elizondo invita a realizar una lectura a partir tanto de los elementos visuales que lo integran, como a los que se hace referencia dentro del mismo texto. Dividido en tres partes, el ensayo indica algunos elementos paratextuales e intertextuales de la obra, con la finalidad de subrayar la importancia de las relaciones intermediales o iconotextuales como punto de referencia para hacer una lectura especifica.
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