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Search Results: 1 - 10 of 270 matches for " Osuna-Canizalez "
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Biocontrol de la pudrición de raíz de nochebuena de interior con Trichoderma spp. Root rot biocontrol for indoor poinsettia with Trichoderma spp.
Felipe de Jesús Osuna-Canizalez,María Félix Moreno-López,Faustino García-Pérez,Sergio Ramírez-Rojas
Revista mexicana de ciencias agrícolas , 2012,
Abstract: En Morelos, la pudrición de la raíz causada por Fusarium spp., es una de las principales enfermedades de la nochebuena de interior. Por su efecto devastador, en su prevención o control se realizan aplicaciones frecuentes de productos químicos, con los riesgos inherentes a la salud humana y al ambiente. En la búsqueda de alternativas bioracionales al manejo de esta enfermedad, se realizó un ensayo en el que se evaluaron tres cepas comerciales de Trichoderma spp., en tres diferentes sustratos: S1= "tierra de hoja" (70% v/v)+tezontle grueso (15% v/v)+tezontle fino (10% v/v)+agrolita (5% v/v); S2= turba (80% v/v)+ fibra de coco (20% v/v); S3= "tierra de hoja" (70%) + "tepojal" (30%), en las variedades comerciales más comunes, Freedom Red y Prestige Red. Se utilizó un dise o factorial de tratamientos 4 x 3 x 2 y los tratamientos resultantes se evaluaron en un dise o completamente al azar con seis repeticiones. Respecto a la incidencia de pudrición de la raíz, las cepas comerciales de Trichoderma spp., no mostraron diferencias entre sí ni con el testigo químico. La pudrición de la raíz estuvo asociada con S2, debido a una baja capacidad de aireación, y sólo se presentó en Prestige Red. La población (UFC g-1) de Trichoderma spp., en el sustrato al término del ciclo, fue igual (p< 0.05) entre cepas comerciales y entre estas y el testigo químico (sin inoculación), debido a la presencia de cepas nativas de Trichoderma en los componentes orgánicos de los sustratos ("tierra de hoja", turba y fibra de coco). In Morelos, root rot caused by Fusarium spp., is one of the main diseases of indoor poinsettia. In order to prevent or control its devastating effect, frequent applications of chemical products are performed, with inherent risks to human health and environment. In quest for alternative biorational options, an essay in which three commercial strains of Trichoderma spp., was done, in three different substrates: S1= "organic soil" (70% v/v)+thick tezontle (15% v/v)+thin tezontle (10% v/v)+agrolita (5% v/v); S2= peat moss (80% v/v)+ coconut fiber (20% v/v); S3= "organic soil" (70%)+"tepojal" (30%), in most common commercial varieties, Freedom Red and Prestige Red. A factorial design of 4 x 3 x 2 treatment was used and resulting treatments were evaluated in a completely random design with six repetitions. Regards root rot incidence, commercial strains of Trichoderma spp., did not show differences between them, either with chemical control. Root rot was associated with S2, due low aeration capacity, and only it was seen in Prestige Red. Population of Trichoderma spp.,
Biocontrol de la pudrición de raíz de nochebuena de interior con Trichoderma spp.
Osuna-Canizalez, Felipe de Jesús;Moreno-López, María Félix;García-Pérez, Faustino;Ramírez-Rojas, Sergio;Canul-Ku, Jaime;
Revista mexicana de ciencias agrícolas , 2012,
Abstract: in morelos, root rot caused by fusarium spp., is one of the main diseases of indoor poinsettia. in order to prevent or control its devastating effect, frequent applications of chemical products are performed, with inherent risks to human health and environment. in quest for alternative biorational options, an essay in which three commercial strains of trichoderma spp., was done, in three different substrates: s1= "organic soil" (70% v/v)+thick tezontle (15% v/v)+thin tezontle (10% v/v)+agrolita (5% v/v); s2= peat moss (80% v/v)+ coconut fiber (20% v/v); s3= "organic soil" (70%)+"tepojal" (30%), in most common commercial varieties, freedom red and prestige red. a factorial design of 4 x 3 x 2 treatment was used and resulting treatments were evaluated in a completely random design with six repetitions. regards root rot incidence, commercial strains of trichoderma spp., did not show differences between them, either with chemical control. root rot was associated with s2, due low aeration capacity, and only it was seen in prestige red. population of trichoderma spp.,(ufc g-1) in the substrate at end of cycle was the same (p< 0.05) between commercial strains and between them and the control (without inoculation), due presence of native strains of trichoderma in organic components of substrates ("organic soil", peat moss and coconut fiber).
Rigidity of the Stable Norm on Tori
OSUNA,OSVALDO;
Revista Colombiana de Matemáticas , 2010,
Abstract: given a closed, orientable riemannian manifold, we study the stable norm on the real homology groups. in particular, for n≥ 2 we prove that a riemannian n-torus, which has the same stable norms as a flat n-torus on the first and n-1 homology groups, is in fact isometric to the flat torus.
Rigidity of the Stable Norm on Tori Rigidez de la norma estable sobre toros
OSVALDO OSUNA
Revista Colombiana de Matemáticas , 2010,
Abstract: Given a closed, orientable Riemannian manifold, we study the stable norm on the real homology groups. In particular, for n≥ 2 we prove that a Riemannian n-torus, which has the same stable norms as a flat n-torus on the first and n-1 homology groups, is in fact isometric to the flat torus. Dada una variedad Riemanniana, cerrada y orientable, estudiamos la norma estable sobre sus grupos de homología real. En particular, para n≥ 2 demostramos que si un n-toro Riemanniano tiene normas estables iguales a las normas estables de un n-toro plano sobre el primer y n-1 grupos de homología; entonces es isométrico a dicho toro plano.
Ciencia: selección
Aníbal Osuna
Gaceta Médica de Caracas , 2005,
Abstract:
Los avisos para la muerte de Luis Ramirez de Arellano
Inmaculada Osuna
Via Spiritus : Revista de História da Espiritualidade e do Sentimento Religioso , 2009,
Abstract: Avisos para la muerte (1634), compiled by Luis Ramírez de Arellano, gathers, along with other complementary materials (among these, two prayers written in verse for before confession and before communion, and an act of contrition in prose), thirty poems that are presented as models for prayers addressed to a crucified Christ in the moment of his death. These poems emerge from a group initiative in which notable poets from the Madrid court took part, poets such as Lope de Vega, Pedro Calderón de la Barca, José de Pellicer, José de Valdivielso, Luis Vélez de Guevara, Juan Pérez de Montalbán and Francisco de Rojas Zorrilla. My article examines the social context in which this poetic collection is born, the composition of the book, its successful publishing history throughout two centuries as well as the reiterative representation in the poems of particular meditatio mortis topics (the staging of agony; the expression of repentance, love for Christ and hope for his mercy; and the contemplation of Christ’s body on the cross).
Características de ser un Buen Profesional de Ingeniería en la Universidad Autónoma de Baja California, México
Osuna,Cecilia; Luna,Edna;
Formación universitaria , 2008, DOI: 10.4067/S0718-50062008000100005
Abstract: the objective of this study was to determine the most significant characteristics of "being a good professional? in the opinion of teachers and students of engineering at the universidad autonoma de baja california in méxico. qualitative and quantitative techniques for analysis were used, which allow to determine that competences determined by the characteristics of honesty, responsibility and ethics, were the most important ones. however, some discrepancies between the opinion of students and professors in the evaluated characteristics. it is concluded that it is convenient and necessary to evaluate the agreement between the objectives of important careers such as engineering and the actual formative programs of the university.
Valores éticos en la Formación Universitaria de las áreas de Ciencias Naturales e Ingeniería y Tecnología, en el Contexto de la Sociedad del Conocimiento
Osuna,Cecilia; Luna,Edna;
Formación universitaria , 2011, DOI: 10.4067/S0718-50062011000500005
Abstract: this paper presents a study that identifies the ethical values that the professors of the academic area of natural sciences and engineering and technology of the universidad autonoma of baja california, in méxico?, recommend promoting in teaching and education. a study case was analyzed using a qualitative approach and with the technique of content analysis values such as honesty, responsibility and respect were identified. professors suggested various methodological strategies for the promotion of those values. there were similarities between both areas of knowledge in generic values, but differences were found in some specific values. ??it is concluded that these results could be useful to guide the educational activities of the university, to build the human capital capable of developing their professional life with clear commitment of social responsibility.
El discurso administrativo y la tradición pragmática
Galicia Osuna, David;
Contaduría y administración , 2009,
Abstract: administration and its discourse cannot be deemed as science and theory since it does not meet the theoricity, contrastation, refutation, deductibility and axiomatization criteria. in this paper i propose to locate the administrative discourse within the pragmatic tradition, particularly because of its similarities with this tradition. it is argued that the administrative discourse focuses on results, usefulness, goals achievement, desine gratification, effectiveness, prudence, instrument rationality (means-end) and for-profit objectives. at the same time it subordinates epistemological issues such as truth, theoricity, deductibility and coherence criteria, hypothesis contrastation and the search for truth. a reflection is necessary on the administrative discourse propositions and their relation to reality beyond results. this is necessary in order to advance towards the theorization of administration.
El acceso y la promoción de los funcionarios en la administración del bajo imperio
Malavé Osuna,Belén;
Revista de estudios histórico-jurídicos , 2005, DOI: 10.4067/S0716-54552005000100005
Abstract: this paper addresses the complicated issue of the historical-dogmatic reconstruction of the governmental juridical statute of the low roman empire, regarding only the criteria that ruled the recruitment and promotion of the administrative personnel of low and high hierarchy. in fact, such a statute can be only hypothesized, since the available sources, in particular constitutions under imperialisms, show the non-restricted nature of the hierarchical rules as well as the lack of calling in them supposedly present in all juridical regulations, uniformity and generality. from constantine to justinian, rules were established, often oscillating and barely objective, even subject to the discretional power of the head of service in order to discipline the entry to and promotion of the positions in the imperial administration, revealing by then a strong bureaucracy. besides, the need for such criteria was not perceived per se in the political power but rather as a mere vehicle leading to the eradication of a social phenomenon, a widely spread practice, which steadily used to buy off the offices and positions in the administration.
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