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Search Results: 1 - 10 of 536373 matches for " Juan José Pe?a Cabriales "
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Dinamic of Bacteria Desnitrificants and Nitrificants in the Rizospheric of Wheat with Slow Release of Fertilizer, Irrigated with Waste or Well Water  [PDF]
Sandra Grisell Mora-Ravelo, Francisco Gavi Reyes, Jesús Pérez Moreno, Juan José Pea Cabriales, Leonardo Tijerina Chávez, Ma. de Lourdes de la Isla de Bauer
Advances in Microbiology (AiM) , 2013, DOI: 10.4236/aim.2013.34048
Abstract:

The study of the paper about the rhizosphere in the transformation of nitrogen compounds can generate knowledge of the microbial and biochemical atmosphere of the rhizosphere of wheat, for the understanding of the dynamics of the N in agricultural zones, with the purpose of optimizing the fertilizer use and increasing the productivity of the cultures. Therefore, the objective of the present work was to know the effect the rhizosphere in the dynamics of the bacterial populations that take part in the cycle of the N in wheat nourished with slow release fertilizer and one commercial, irrigated with waste water or well. Analyses in the soil took place vertisol used in the experiment with the rhizospheric and non rhizospheric fraction. The slow release fertilizer used has a matrix enriched with N and P and is in the process of being patented (it explains in materials and methods). Each fertilizer was evaluated and the combination of the slow release fertilizer with organic fertilizer. The technique of the number most probable was used (MNP) to carry out the quantification of the nitrificants and denitrificants bacteria to the 55, 67 and 97 days after sowing (Dds). The results obtained for the MNP of denitrificants bacteria and Nitrosomonas indicate that the effect average of the types of water, soil and fertilizers, as well as their interaction to each other was not significant (p > 0.05). The effect of the fertilizing type and soil (rhizospheric and non rhizospheric) in the MNP of Nitrobacter was significant (p < 0.05). The tendencies show that the non rhizospheric soil is more favorable for the development of denitrificants bacteria and Nitrobacter, whereas the MNP of Nitrosomonas was greater in rhizospheric soil.

El género fúngico Trichoderma y su relación con los contaminantes orgánicos e inorgánicos
ARGUMEDO-DELIRA, Rosalba;ALARCóN, Alejandro;FERRERA-CERRATO, Ronald;PEA-CABRIALES, Juan José;
Revista internacional de contaminación ambiental , 2009,
Abstract: the trichoderma fungal species have been fully characterized due to their application to agriculture since they are important antagonists for several horticultural plant pathogens. in contrast, the behavior and the effects of these fungi at contaminated soils have been scarcely studied. this review compiles updated information about the interactions among trichoderma species and organic (petroleum hydrocarbons, explosives, and pesticides) and inorganic (heavy metals and cyanide) pollutants in order to know their potential for remediating contaminated environments. nevertheless, for such purposes, it is needed further experimental research based on applying trichoderma species either to study their physiological, biochemical and molecular responses when exposed to several types of pollutants, or to assess their potential application into the several processes of bioremediation.
EL GéNERO FúNGICO Trichoderma Y SU RELACIóN CON CONTAMINANTES ORGáNICOS E INORGáNICOS
Rosalba ARGUMEDO-DELIRA,Alejandro ALARCóN,Ronald FERRERA-CERRATO,Juan José PEA-CABRIALES
Revista internacional de contaminación ambiental , 2009,
Abstract: Las especies de hongos que pertenecen al género Trichoderma han sido plenamente caracterizadas por tener aplicación en el ámbito agrícola, principalmente para el control biológico de otros organismos patógenos que atacan a los cultivos. Sin embargo, los estudios sobre su comportamiento y su efecto en ambientes terrestres y acuáticos contaminados han sido escasamente estudiados. Esta revisión pretende hacer una compilación de toda la información actualizada disponible, respecto a la interacción de Trichoderma en presencia de contaminantes de origen orgánico (hidrocarburos del petróleo, explosivos y plaguicidas) e inorgánico (metales pesados y cianuro) con el fin de conocer el potencial de este grupo fúngico en la biorremediación de ambientes contaminados. No obstante, para tales fines, es necesario realizar investigaciones enfocadas en evaluar sus respuestas fisiológicas, bioquímicas y moleculares ante diferentes tipos de contaminantes, y definir con ello su posible aplicación en los diferentes sistemas de biorremediación.
Desnitrificación de un fertilizante de lenta liberación y urea+fosfato monoamónico aplicados a trigo irrigado con agua residual o de pozo
Sandra Grisell Mora Ravelo,Francisco Gavi Reyes,Juan José Pea Cabriales,Jesús Peréz Moreno
Revista internacional de contaminación ambiental , 2007,
Abstract: El estudio de la emisión de óxido nitroso (N2O) producto de la combinación de tipos de fertilizante y agua en suelo rizosférico, y no rizosférico a lo largo del ciclo del cultivo, puede generar conocimiento que contribuya a incrementar la eficiencia de recuperación del N de los fertilizantes o abonos y a reducir las pérdidas de nitrógeno (N) por desnitrificación. El empleo eficiente de fertilizantes nitrogenados y de aguas residuales no tratadas de origen urbano por los cultivos es una necesidad agronómica, económica y ambiental. La desnitrificación es un factor importante que generalmente disminuye la eficiencia del N aplicado a los cultivos. El objetivo del presente trabajo fue evaluar la desnitrificación de un fertilizante de lenta liberación usando como referencia urea+fosfato monoamónico y fertilizante orgánico, en trigo irrigado con agua residual o de pozo. Se efectuaron análisis en el suelo vertisol empleado en el experimento con la fracción rizosférica y no rizosférica. El fertilizante de lenta liberación usado tiene una matriz enriquecida con N y fósforo (P) y se encuentra en proceso de ser patentado. Se evaluó cada fertilizante y la combinación del fertilizante de lenta liberación con fertilizante orgánico. Las muestras de suelo rizosférico y no rizosférico fueron colectadas a los 55, 67 y 97 días después de la siembra, se incubaron durante 18 días a una temperatura de 25 °C controlando diariamente la humedad. Los resultados (p < 0.05) arrojaron que las interacciones entre: muestreos y tipos de agua, muestreos y fertilizantes y tipos de agua y fertilizantes afectaron (p < 0.06) la emisión de N2O, la cual se incrementó al aplicar urea+fosfato monoamónico junto con agua residual. En promedio existió menos emisión de N2O al aplicar fertilizante de lenta liberación o fertilizante orgánico al irrigar con agua de pozo que con agua residual. El uso de agua residual en promedio se asoció con una mayor pérdida de N. La mayor emisión promedio de N2O ocurrió a los 67 días después de la siembra. La desnitrificación promedio fue similar en el suelo rizosférico y no rizosférico.
Desnitrificación de un fertilizante de lenta liberación y urea+fosfato monoamónico aplicados a trigo irrigado con agua residual o de pozo
MORA RAVELO, Sandra Grisell;GAVI REYES, Francisco;PEA CABRIALES, Juan José;PERéZ MORENO, Jesús;TIJERINA CHáVEZ, Leonardo;VAQUERA HUERTA, Humberto;
Revista internacional de contaminación ambiental , 2007,
Abstract: the study of n2o emission originated by the combination of different types of fertilizers and water on rizospheric soil, and non- rizospheric soil along the crop cycle, can contribute to useful knowledge in order to increase fertilizer and manure n recovery efficiency and to reduce the n loss by denitrification. the efficient use of nitrogen fertilizers and non- treated urban waste water for crops is an agronomic, economic and environmental need. the denitrification is an important factor that diminishes the n efficiency in crops. the objective of this investigation was to evaluate the denitrification of a slow release fertilizer using as reference urea plus monoamonium phosphate and an organic fertilizer, applied to wheat irrigated with urban waste water or well water. analyses were made in the vertisol type soil used in the experiment with both, rizospheric and non-rizospheric soil. the slow release fertilizer used has a matrix enriched with n and p and its patent is currently in progress. each fertilizer was evaluated alone, as well as the slow release fertilizer plus organic fertilizer. the samples of rhizospheric and non-rhizospheric soils for each treatment were collected at 55, 67 and 97 days after sowing and incubated during 18 days at 25 °c, controlling the soil humidity daily. the results (p < 0.05) showed that the interactions between samplings and types of water, samplings and fertilizers, and types of water and fertilizers affected (p < 0.06) the emission of n2o, which was increased when urea plus monoamonium phosphate and waste water were applied. on average, there was less n2o when emissions slow release fertilizer or organic fertilizer were applied and irrigated with well water as compared to irrigation with waste water. as well, use of waste water was, on average, associated with a bigger loss of n. the highest average emission in n2o was observed 67 days after sowing. the average denitrification was similar in the rhizospheric and non-rhizospheric
Puntos críticos en el manejo integral de mango: floración, antracnosis y residuos industriales
Santos-Villalobos, Sergio de los;Folter, Stefan de;Délano-Frier, John Paul;Gómez-Lim, Miguel ángel;Guzmán-Ortiz, Doralinda Asunción;Pea-Cabriales, Juan José;
Revista mexicana de ciencias agrícolas , 2011,
Abstract: at world level, mexico is located as an important participant in fresh mango production and trade, standing out as producer (2*106 t year-1) and exporter (2*105 t year-1) of mango and importer of minimum quantities with regard to its production and export. the economic activity around mango, is integrated by a group of stages that goes from fruit production to its consumption, which has been called value chain of mango; with base in scientific and empiric knowledge in relation to this cultivation, the critical points of more impact on this value chain in mexico that we have detected, with negative repercussions for the economy of fruit farmers, are located in stages: production (flowering and anthracnosis) and industrialization (use of vegetable residuals generated in fresh mango process of industrialization). this revision presents a global analysis of stages that put in risk to this value chain in mexico, as well as the causes and possible solutions to these, by means of alternatives that optimize its integral handling.
Burkholderia ambifaria and B. caribensis Promote Growth and Increase Yield in Grain Amaranth (Amaranthus cruentus and A. hypochondriacus) by Improving Plant Nitrogen Uptake
Fannie I. Parra-Cota, Juan J. Pea-Cabriales, Sergio de los Santos-Villalobos, Norma A. Martínez-Gallardo, John P. Délano-Frier
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0088094
Abstract: Grain amaranth is an emerging crop that produces seeds having high quality protein with balanced amino-acid content. However, production is restricted by agronomic limitations that result in yields that are lower than those normally produced by cereals. In this work, the use of five different rhizobacteria were explored as a strategy to promote growth and yields in Amaranthus hypochondriacus cv. Nutrisol and A. cruentus cv. Candil, two commercially important grain amaranth cultivars. The plants were grown in a rich substrate, high in organic matter, nitrogen (N), and phosphorus (P) and under greenhouse conditions. Burkholderia ambifaria Mex-5 and B. caribensis XV proved to be the most efficient strains and significantly promoted growth in both grain amaranth species tested. Increased grain yield and harvest index occurred in combination with chemical fertilization when tested in A. cruentus. Growth-promotion and improved yields correlated with increased N content in all tissues examined. Positive effects on growth also occurred in A. cruentus plants grown in a poor soil, even after N and P fertilization. No correlation between non-structural carbohydrate levels in roots of inoculated plants and growth promotion was observed. Conversely, gene expression assays performed at 3-, 5- and 7-weeks after seed inoculation in plants inoculated with B. caribensis XV identified a tissue-specific induction of several genes involved in photosynthesis, sugar- and N- metabolism and transport. It is concluded that strains of Burkholderia effectively promote growth and increase seed yields in grain amaranth. Growth promotion was particularly noticeable in plants grown in an infertile soil but also occurred in a well fertilized rich substrate. The positive effects observed may be attributed to a bio-fertilization effect that led to increased N levels in roots and shoots. The latter effect correlated with the differential induction of several genes involved in carbon and N metabolism and transport.
Locuras que no lo parecen.
José María álvarez Martínez,Juan Pea Esbrí
Revista de la Asociación Espa?ola de Neuropsiquiatría , 2007,
Abstract: Sin resumen.
La singularidad del neologismo.
José María álvarez Martínez,Juan Pea Esbrí
Revista de la Asociación Espa?ola de Neuropsiquiatría , 2008,
Abstract: Como sucede en muchos otros ámbitos del saber, también el período fundacional de la psicopatología se caracterizó por una riqueza descriptiva y heurística incomparable. La obra tardía de Esquirol –en especial sus estudios sobre las alucinaciones– orientó el estudio de la patología mental hacia la construcción de la semiología clínica, terreno fecundo sobre el que habrían de erigirse los edificios nosológicos y las parcelas nosográficas. La investigación de las alucinaciones llevada a cabo por Baillarger y Séglas culminó, a principios del siglo XX, con la descripción de las locuras discordantes (Chaslin), el Automatismo Mental (Clérambault) y las psicosis alucinatorias crónicas (Ballet). Próximo a este polo xenopático de la psicosis –correspondiente grosso modo al grupo de las esquizofrenias de Bleuler– se halla el de las formas delirantes de la locura, el cual atrajo el interés de los psicopatólogos sobre todo por algunos trastornos del lenguaje, entre los que el neologismo ocupó el lugar más destacado.
Leiomiosarcoma de vejiga: cistectomía parcial y tratamiento complementario
Cumplido Burón,José David; Toral Pea,Juan Carlos;
Archivos Espa?oles de Urología (Ed. impresa) , 2009, DOI: 10.4321/S0004-06142009000400011
Abstract: objective: we report a new case of bladder leiomyosarcoma in an old patient. methods: we present the case of a 75-year-old man with bladder leiomyosarcoma treated by partial surgery followed by adjuvant treatment. results: partial surgery of the primary tumor followed by concomitant chemo-radiotherapy was the approach for this patient. nowadays, patient is free of tumor and living without any problems. conclusions: bladder leiomyosarcoma is an uncommon tumor (only about 1 % of all bladder cancers) treated ba-sically with radical surgery. nowadays, partial surgery is a usual approach in other tumors and there is a trend toward less aggressive surgery with preservation of function (such as head and neck cancer, bladder cancer).
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