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Search Results: 1 - 10 of 194457 matches for " Arturo Díaz "
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La concepción de la persona en Jacques Maritain. Desde la noción de individuo a la de libertad personal
Arturo Díaz
Polis : Revista de la Universidad Bolivariana , 2006,
Abstract: En este artículo se intenta entregar una visión sintética de un tema de suyo complejo como lo constituye la realidad personal del ser humano. La reflexión de Jacques Maritain alienta y alimenta las perspectivas antropológicas que dan cuenta de la conformación del hombre, de sus características propias, de su ser personal, de su dignidad irrenunciable, de su necesidad de contar con los otros para constituir la sociedad, de proyectarse en el ámbito específico de lo político; y -finalmente- de asegurar, profundizar y extender su libertad.
Disminuye el interés (o la demanda) por el estudio de la carrera de contador público? Análisis del problema y propuestas de solución
Arturo Díaz Alonso
Contaduría y administración , 2002,
Abstract:
El marco deseable de una reforma fiscal
Arturo Díaz Alonso
Contaduría y administración , 2002,
Abstract:
Sistema fiscal a las remuneraciones como elemento promotor del empleo y la inversión
Arturo Díaz Alonso
Contaduría y administración , 2003,
Abstract:
La formación ética de los contadores públicos ante el caso Enron-Andersen
Arturo Díaz Alonso
Contaduría y administración , 2002,
Abstract:
Marine biodiversity in Colombia: Achievements, status of knowledge, and challenges
Díaz,Juan M; Acero,Arturo;
Gayana (Concepción) , 2003, DOI: 10.4067/S0717-65382003000200011
Abstract: colombia is recognized as a megadiverse country on the basis of the number of terrestrial animal and plant species occurring within its boundaries. however, due to the circumstance that it possesses coasts on both the caribbean sea and the pacific ocean, each of them exhibiting distinct geological, oceanographic, and climatic features, colombia is perhaps the country with the highest marine biological diversity in south america and one of the most biodiverse in the new world. although scientific research concerning marine biodiversity of colombia has a very short history, considerable knowledge has been achieved in the last 10 years, particularly in regard to species inventories and ecosystem characterizations, including thematic mapping. relatively accurate estimates about the numbers of species of fishes, birds, mammals, reptiles, and some marine invertebrate groups occurring in colombian waters are now available, as well as the location, extent, and structure of the major coastal-marine ecosystems, including coral reefs, mangroves, and seagrass meadows. according to their geologic, hydrographic, climatic, and biological features, the coastal and oceanic realms of colombia have been subdivided into 18 natural ecoregions, nine in the caribbean and nine in the pacific. considering the current scientific capacity of colombia, including financial and logistic limitations, short and mid-term research plans and programs have been designed in order to orient marine biodiversity studies toward prioritary issues and geographic areas according to the responsibilities imposed by the biodiversity convention and the national biodiversity plan.
Marine biodiversity in Colombia: Achievements, status of knowledge, and challenges Biodiversidad marina en Colombia: Estado actual del conocimiento y desafios futuros
Juan M Díaz,Arturo Acero
Gayana (Concepción) , 2003,
Abstract: Colombia is recognized as a megadiverse country on the basis of the number of terrestrial animal and plant species occurring within its boundaries. However, due to the circumstance that it possesses coasts on both the Caribbean Sea and the Pacific Ocean, each of them exhibiting distinct geological, oceanographic, and climatic features, Colombia is perhaps the country with the highest marine biological diversity in South America and one of the most biodiverse in the New World. Although scientific research concerning marine biodiversity of Colombia has a very short history, considerable knowledge has been achieved in the last 10 years, particularly in regard to species inventories and ecosystem characterizations, including thematic mapping. Relatively accurate estimates about the numbers of species of fishes, birds, mammals, reptiles, and some marine invertebrate groups occurring in Colombian waters are now available, as well as the location, extent, and structure of the major coastal-marine ecosystems, including coral reefs, mangroves, and seagrass meadows. According to their geologic, hydrographic, climatic, and biological features, the coastal and oceanic realms of Colombia have been subdivided into 18 natural ecoregions, nine in the Caribbean and nine in the Pacific. Considering the current scientific capacity of Colombia, including financial and logistic limitations, short and mid-term research plans and programs have been designed in order to orient marine biodiversity studies toward prioritary issues and geographic areas according to the responsibilities imposed by the Biodiversity Convention and the National Biodiversity Plan. Colombia es reconocido como un país megadiverso con base en la cantidad de especies de plantas y animales terrestres que posee. Esto, debido, entre otras cosas, a que tiene costas sobre el mar Caribe y el océano Pacífico, con características geológicas, oceanográficas y climáticas muy contrastantes, Colombia es seguramente el país con mayor diversidad biológica marina de Sudamérica y uno de los más biodiversos del Nuevo Mundo. Aunque la investigación científica sobre la biodiversidad marina de Colombia tiene una historia muy corta y reciente, en los últimos 10 a os se han realizado grandes avances en la generación de conocimiento, particularmente en cuanto a inventarios de especies y caracterización de ecosistemas, incluyendo mapas temáticos. Se dispone actualmente de estimativos relativamente confiables sobre la cantidad de especies de peces, aves, mamíferos, reptiles y de algunos grupos de invertebrados marinos que habitan
Producción comparativa de chícharo de vaca (vigna unguiculata) y frijol (phaseolus vulgaris) en riego y en sequía
Arturo Díaz,Alfredo S. Ortegón
Agronomía Mesoamericana , 2000,
Abstract: Producción comparativa de chícharo de vaca (Vigna unguiculata) y frijol (Phaseolus vulgaris) en riego y en sequía. Se comparó la productividad de seis genotipos de chícharo de vaca (Vigna unguiculata) y dos variedades de frijol (Phaseolus vulgaris), en dos condiciones, una en riego y otra en sequía. En riego, California Blackeye No. 5 la mejor producción de vaina y 29144 , 56061/BRE y California Blackeye No. 5 el mayor rendimiento de grano. En frijol, Pinto Anzalduas 91 registró el mayor rendimiento de grano. En sequía se presentó clorosis férrica y hubo un amplio rango de severidad entre las especies y cultivares. No se registraron precipitaciones durante el ciclo y sólo tres genotipos de chícharo de vaca llegaron a producir vaina y grano; California Blackeye No. 5 fue la mejor productora de vaina y grano. Las variedades de frijol no produjeron grano. La mayoría de los genotipos de chícharo de vaca sobresalieron en la producción de materia seca. La mayor altura de planta fue en chícharo de vaca y se correlacionó (r= 0,71) con materia seca. Resultó contrastante la productividad de las dos especies entre las condiciones evaluadas, aunque destacó el mayor potencial productivo del chícharo de vaca sobre el frijol
Two agronomical aspects of Tagetes terniflora HBK for essential oil production  [PDF]
Miguel ángel Serrato Cruz, Francisco Díaz Cedillo, Daniel Hernández Medina, Arturo Curiel Rodríguez
Journal of Agricultural Chemistry and Environment (JACEN) , 2014, DOI: 10.4236/jacen.2014.31002
Abstract: The genus Tagetes is a possible source of essential oils for the biorational control of pests and diseases in Mexico. The aim of the present study was to assess the distance between plants (PD; 15 × 80, 30 × 80 and 60 × 80 cm) and urea fertilization (0, 60 and 120 kg·he-1 N) for biomass production and essential oil in Tagetes terniflora HBK. Oil was obtained by the aerial part hydro-distillation and its chemical composition was analyzed by gas chromatography coupled to mass spectrometry. Factors N, PD and their interaction did not change plant height or the number of branches per plant; however, PD factor modified fresh tissue (FW) and dry tissue (DW) weights and the amount of oil per plant (p ≤ 0.05) which represent a good biomass production (30 to 72.5 ton·he-1 FW, 11 to 27 ton·he-1 DW) and oil producing (168 to 383 L·he-1 ) potential in the field. Urea did not have effect on both biomass and oil response per plant but interaction of 15 x 80 DP and 120 N could favor higher biomass and oil production potential (78 ton FW, 28 ton·he-1 DW and 608 L·he-1 , respectively). Essential oil yield varied from 0.3 to 2.1% according to the management conditions. A total of 11 major compounds were identified in essential oil, the relative quantity was constant in different agronomic management factors: E- tagetone (22%), cistagetenone (20.4%), transtagetenone (20.4%), dihydrotagetone (13.4%) and cis-β-ocimene (10.3%), trans-β-ocimene (5.0%), propenyl anisole (4.3%), sphatulenole (1.1%), allyl anisole (0.7%), Z-tagetone (0.5%) and limonene (0.5%).
Effectiveness of Selected Microbial Strains on the Growth of Sweet Sorghum  [PDF]
Arturo Díaz-Franco, Oscar Arath Grageda-Cabrera, Mónica Guadalupe Lozano-Contreras
Agricultural Sciences (AS) , 2015, DOI: 10.4236/as.2015.68074
Abstract: Microbial inoculants are of great importance in agro-ecology and plants. However, the symbiotic effectiveness of strains may vary between species or within the same species. Aim of the study was to select experimental microbial strains of national origin, to know its impact on growth of sweet sorghum (Sorghum bicolor) in greenhouse and sterile soil. Five strains of arbuscular mycorrhizal fungi (AMF) and eight rhizobacteria (two of them mutagenized) were compared with non-inoculated plants as control. Variables measured were index of chlorophyll SPAD, plant height, stem diameter (from the middle section), fresh biomass from stem, leaf, panicle, radical, and stem sugars content (°Brix) of every two internodes. The results showed that in the majority of cases, microbial strains exceeded the values of variables compared with control plants. The highest values of chlorophyll (41.8 SPAD), stem diameter (13.5 mm) and total fresh biomass (144.3 g), were recorded with rhizobacterias BS410 (Herbaspirillum sp.), B2709 (Pseudomonas sp.) and B4M4 (Azospirillum sp.), respectively.
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