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Search Results: 1 - 10 of 13177 matches for " Rafael;Rosales Serna "
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Estabilidad de rendimiento en genotipos mesoamericanos de frijol de grano en México
López Salinas, Ernesto;Acosta Gallegos, Jorge Alberto;Tosquy Valle, Oscar Hugo;Salinas Pérez, Rafael Atanasio;Sánchez García, Bertha María;Rosales Serna, Rigoberto;González Rivas, Carlos;Moreno Gallegos, Tomás;Villar Sánchez, Bernardo;Cortinas Escobar, Héctor Manuel;Zandate Hernández, Román;
Revista mexicana de ciencias agrícolas , 2011,
Abstract: in mexico, over 400 000 t of black beans are consumed every year, and the country's production is insufficient, which is why it is also imported. by planting varieties with a higher potential yield tan those used nowadays, greater amounts can be produced, and imports reduced or even avoided. the aim was to establish the yield and adaptability of lines and varieties of mesoamerican breed of black beans, in different environments in mexico (one in chiapas, three in veracruz, one in puebla, one in the state of mexico, two in guanajuato, one in tamaulipas, two in durango, one in zacatecas, one in nayarit and two in sinaloa) in 2008. the experiment was set up in a 4*4 lattice design with four repetitions, in fields of four five-meter long furrows, separated by 0.76 m. during the trials, diverse agricultural characteristics were determined, including yield. with the yield data, a combined analysis was performed (environments-genotypes) and the stability parameters were estimated using the main additives effect and multiplicative interaction model. highly significant differences were found (p< 0.01) between environments, genotypes and the interaction of both factors. the environments explained variance (59%) further, in comparison to the environment*genotype (23%) interaction and genotype (7%). the highest yields were obtained in mazatlán, sinaloa and durango, durango, whereas the lowest was found in guasave, sinaloa. the negro papaloapan variety displayed the highest average yield of 1.4 t ha-1 and presented a reduced interaction with the test environments.
Rendimiento y reacción a enfermedades en frijol tipo Flor de Mayo en riego y temporal
Acosta Gallegos, Jorge Alberto;Sánchez Garcia, Bertha María;Mendoza Hernández, Francisco Manuel;Jiménez Hernández, Yaneth;Salinas Pérez, Rafael;Rosales Serna, Rigoberto;Navarrete Maya, Rosa;Zandate Hernández, Román;Alvarado Mendoza, Simón;Padilla Ramírez, José Saúl;
Revista mexicana de ciencias agrícolas , 2010,
Abstract: the 'flor de mayo' bean type is highly demanded by consumers in central mexico, its production takes place at the semiarid, el bajio and the central plateau regions. the aim was to test a set of 14 bred lines plus two checks across 10 rainfed locations and four irrigated sites on the basis of seed yield, 100-seeds weight and disease reaction. trials were conducted in the spring-summer season 2008 and fall-winter season 2008-2009. data analyses were conducted including all test sites, and independently rainfed and irrigated sites. different diseases attacked the crop across test sites; those widely distributed were common bacterial blight (xanthomonas campestris pv phaseoli) and angular leaf spot (phaeoisariopsis griseola); whereas anthracnose (colletotrichum lindemuthianum) and downy mildew (phythohpthora phaseoli) show a strong attack at calera, zacatecas and celaya, guanajuato, respectively. average from the genotypes, the highest yield (4.15 t ha-1) was obtained in celaya under irrigated conditions and the lowest at texcoco under rainfed conditions (0.90 t ha-1). the overall analysis indicated highly significant effect (p<0.0001) of environment, genotype and interaction, but the largest contribution to the observed variation was due to location (91%) and the lowest to genotype (1%). the analyses on rainfed data show a lower effect of location (72%) and an increase in the effect of the interaction (25%) and in lower degree that of the genotype (3%). out of fourteen trials, in six of them there were lines significantly superior (p<0.05) to the best check, flor de mayo anita. average from all trials, line fmb 08030 displayed the largest yield (2.06 t ha-1). at all trials most of the lines displayed heavier seeds (p<0.05) that the checks. for seed yield, the effect of location was the most influential and under rainfed conditions the interaction location x genotype was important.
Interaction between karstic aquifers and allogenic rivers: The aquifer of the national park of the ephemeral river Lobos Canyon (Spain)  [PDF]
Eugenio Sanz Pérez, Ignacio Menéndez Pidal, Rafael Segovia Rosales
Natural Science (NS) , 2013, DOI: 10.4236/ns.2013.52A042
Abstract:

A methodology is described for understanding the interaction of karstic aquifers with allogenic rivers, where little information is available. This methodology includes conventional hydrogenology methods tracer tests and measurements of flow into, out of and circulating within the karstic system. The method is designed to understand the hydrogeological behaviour of a river in sufficient detail, given a short study period. The methodology is applied to a karstic system in Spain, obtaining useful, quantitative results for a hydrological year, such as an estimate of the water balance, differentiation between autogenic and allogenic natural recharge, relationship and connection between the river and the aquifer, and measurements of infiltration capacity in watercourses under different hydrological situations. The paper deals with a useful example that could be applied to other rivers and aquifers where few data are available. It can be applied to aquifers under a natural regime and Mediterranean climate.

Piecewise contractions defined by iterated function systems
Arnaldo Nogueira,Benito Pires,Rafael A. Rosales
Mathematics , 2014,
Abstract: Let $\phi_1,\ldots,\phi_n:[0,1]\to (0,1)$ be Lipschitz contractions. Let $I=[0,1)$, $x_0=0$ and $x_n=1$. We prove that for Lebesgue almost every $(x_1,...,x_{n-1})$ satisfying $0
Asymptotically periodic piecewise contractions of the interval
Arnaldo Nogueira,Benito Pires,Rafael A. Rosales
Mathematics , 2013, DOI: 10.1088/0951-7715/27/7/1603
Abstract: We consider the iterates of a generic injective piecewise contraction of the interval defined by a finite family of contractions. Let $\phi_i:[0,1]\to (0,1)$, $1\le i\le n$, be $C^2$-diffeomorphisms with $\sup_{x\in (0,1)} \vert D\phi_i(x)\vert<1$ whose images $\phi_1([0,1]), \ldots, \phi_n([0,1])$ are pairwise disjoint. Let $0
Caracterización física, culinaria y nutricional de frijol del altiplano subhúmedo de México
Pérez Herrera,Patricia; Esquivel Esquivel,Gilberto; Rosales Serna,Rigoberto; Acosta-Gallegos,Jorge A.;
Archivos Latinoamericanos de Nutrición , 2002,
Abstract: physical, culinary and nutritional characterization in dry bean from the semiarid highlands of mexico. in the improvement of a given crop species, knowledge on the grain quality and related traits in the progenitors used in the breeding process is needed to establish their usefulness as a source of a given character, and as well as to plan the proper combinations between progenitors. the aim of the present research was to characterize a group of 49 genotypes of phaseolus vulgaris and one of phaseolus coccineus, in relation to physical, cooking and nutritional grain traits. cultivar blanco tlaxcala (p. coccineus) showed a larger grain size and lower protein content than any of the p. vulgaris cultivars. the 86% of the studied genotypes showed cooking times lower to 115 min, and a significant correlation between this trait and water sorption capacity (r=-0.78 **) was found. cultivars redlands pioneer and ica zerinza could be used as source of low cooking time; and perry marrow, kaboon and ica zerinza in the production of low shell content cultivars. genotypes g 2333, negro lolotla, ren 27 and j 117 showed the highest grain protein content. on the other hand, by 94022, pinto villa and negro 150 had the lowest trypsin inhibitor activity. results support the possible use of the above genotypes as sources of those grain traits. in general, large variability was found for most of the quality traits determined; therefore, there is scope for improvement through recombination and selection.
Actividades educativas en Cruce de los Ba?os sobre prevención del cáncer cervicouterino
Torreblanca Guerra,Rafael; Torres Quiala,Junier; Rosales Lambert,Sorelis;
MEDISAN , 2010,
Abstract: an educative intervention including 142 women that attended the doctor′s office in cruce centro, in the zone of cruce de los ba?os, municipality of iii frente in santiago de cuba was carried out from june 2008 to june 2009, to modify and broaden their knowledge on the program of early prevention of cervical cancer and the main characteristics of the distress. among the different studied variables there were: age, education, occupation and knowledge of the distress, just to mention some of them. statistical data were assessed through mc nemar test, where p< 0,01 was highly significant. from the case material , 138 women modified their knowledge on the distress, either gaining the right ones, removing the inappropriate ones or upgrading them.
La cultura de la ciencia: contribuciones para desarrollar competencias de pensamiento científico en un encuentro con la diversidad
SILVIO DAZA ROSALES,Mario Roberto Quintanilla Gatica,JOSE RAFAEL ARRIETA
Revista Cientifica , 2011,
Abstract: The present article emphasizes on the importance and the role of the sciences, as complex human activities, in the field of applications inside the school context, keeping in mind the values of the pupil and the objec- tives of the school. Therefore, the importance of outlining scientific com- petitions, defined as integrations of knowledge, abilities, attitudes, values and responsibilities. In order to achieve a more profound view, a series of questions are made that should be kept in mind when a curriculum of sciences is build.
Actividades educativas en Cruce de los Ba os sobre prevención del cáncer cervicouterino Educative activities in Cruce de los Ba os on preventing cervical cancer
Rafael Torreblanca Guerra,Junier Torres Quiala,Sorelis Rosales Lambert
MEDISAN , 2010,
Abstract: Se hizo una intervención educativa que incluyó a 142 mujeres pertenecientes al consultorio médico Cruce Centro, del área de salud de Cruce los Ba os en el municipio de III Frente de la provincia de Santiago de Cuba desde junio de 2008 hasta igual mes de 2009, con vista a modificar y ampliar sus nociones sobre el Programa de Detección Precoz del Cáncer Cervicouterino y las principales características de la afección. Entre las variables estudiadas figuraron: edad, escolaridad, ocupación y conocimientos sobre la enfermedad, por citar algunas. Los datos estadísticos fueron validados mediante el test de Mc Nemar, donde p < 0,01 era altamente significativo. De la casuística, 138 de sus integrantes modificaron sus conocimientos sobre el tema, ya fuese adquiriendo los adecuados, eliminando los inadecuados o actualizándolos. An educative intervention including 142 women that attended the doctor′s office in Cruce Centro, in the zone of Cruce de los Ba os, municipality of III Frente in Santiago de Cuba was carried out from June 2008 to June 2009, to modify and broaden their knowledge on the Program of Early Prevention of Cervical Cancer and the main characteristics of the distress. Among the different studied variables there were: age, education, occupation and knowledge of the distress, just to mention some of them. Statistical data were assessed through Mc Nemar test, where p< 0,01 was highly significant. From the case material , 138 women modified their knowledge on the distress, either gaining the right ones, removing the inappropriate ones or upgrading them.
Producción y tecnología de la Okra (Abelmoschus esculentus) en el noreste de México
Díaz Franco, Arturo;Loera Gallardo, Jesús;Rosales Robles, Enrique;Alvarado Carrillo, Manuel;Ayvar Serna, Sergio;
Agricultura técnica en México , 2007,
Abstract: in mexico, the okra is a non-traditional vegetable cultivated in 4000 to 7000 ha annually with an average yield of 10 t ha-1; most of the production is exported to the united states of america. main okra producer states include: morelos, michoacan, guerrero and tamaulipas. in this last state okra is produced in up to 5 000 ha. okra is a rentable vegetable crop that also promotes hand labor. research on okra started in mexico twenty years ago. fruit quality is a key factor for okra marketing; soft texture fruits with intense green color and of regular shape are preferred. higher okra yield are obtained in clay loam soils. a problem for crop establishment are the low soil temperatures that causes low okra emergence in early plantings. foliar fertilization has not being effective to increase yields. pruning is a promising practice because its optimizes crop yields by extending the crop season. some okra hybrids tested in the region show productive advantages in relation to the traditional cultivar 'clemson spineless'. the most important disease is yellow mottled virus, transmitted by whiteflies (trialeurodes vaporariorum). this virus has caused the abandonment of the okra crop in the states of guerrero and morelos. ineffective weed control in okra has deleterious effects on yield, increases production cost and difficults harvest.
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