Search results for "Cuba."
showing 10 items of 340 documents
Somatic Embryogenesis and Plant Regeneration from Hypocotyl Cultures of Digitalis obscura L.
1986
Summary Hypocotyl sections from 20-day-old seedlings of Digitalis obscura L. were used to examine the effect of IAA on somatic embryogenesis. Although embryogenesis was obtained with all IAA concentrations (0.1, 0.5 and 1 ppm) and under both illumination conditions tested (16 h photoperiod and darkness), incubation in photoperiod increased yield of embryos and shortened the embryo induction time. Optimum results were obtained with 1 ppm IAA. About 30 % of the embryos obtained developed into complete plantlets when transferred to basal medium without growth regulators.
Agency relationship in Global Venture Lab
2014
This Master's thesis analyzes the Agency relationships in university environment by applying a Global Venture Lab model of organization. The Global Venture Lab described in this study is a growth venture incubator that has been developed in the private organizational model to supplement the general faculty governance and the development of the University in the field of commercialization of inventions. In the study, the agent theory dimensions of moral hazard and adverse selection are applied. The research is conducted by action research methods and it is partly written in real time and partly with a retrospective approach. The data of the research is gathered during the development project…
De los Clubes Patrioticos 26 de Julio al Consejo Revolucionario Cubano. Diseños, comportamientos y transformaciones de la emigración cubana radicada …
2015
Resumen de tesis de Doctorado. Título: De los Clubes Patrióticos 26 de Julio al Consejo Revolucionario Cubano. Diseño, comportamientos y transformaciones de la emigración cubana radicada en los Estados Unidos, 1955-1961. Autor: Sergio López Rivero. Tutor: Dr. Joan del Alcazar. La tesis estudia los aspectos políticos y culturales que marcaron el quehacer de la emigración cubana en los Estados Unidos, en una etapa sensible de la historia contemporánea de Cuba: desde la fundación de los Clubes Patrióticos 26 de Julio por parte de Fidel Castro en el otoño del año 1955, hasta el fracaso de la expedición de cubanos anticastristas en Bahía de Cochinos, preparada por la Agencia Central de Inteligen…
Inhibition of denitrification and N2O emission by urine-derived benzoic and hippuric acid
2006
Abstract Hippuric acid (HA) in cattle urine acts as a natural inhibitor of soil N2O emissions. As HA concentration varies with diet, we determined critical HA levels. We also tested the hypothesis that the inhibition occurs because the HA breakdown product benzoic acid (BA) inhibits denitrification rates. During a 64-day incubation, we quantified emissions from artificial urine varying in HA, BA and glycine (Gly) concentrations, added to a sandy pasture soil. Increasing HA concentration from 0.4 to 5.6 mmol kg−1 soil significantly decreased the average N2O flux by 54%. At 3.9 mmol kg−1 soil, denitrification levels were 50% reduced for BA as compared to Gly. We conclude that HA inhibits both…
Exploiting the Opportunity to Use Plant-Derived Nanoparticles as Delivery Vehicles
2023
The scientific community has become increasingly interested in plant-derived nanoparticles (PDNPs) over the past ten years. Given that they possess all the benefits of a drug carrier, including non-toxicity, low immunogenicity, and a lipid bilayer that protects its content, PDNPs are a viable model for the design of innovative delivery systems. In this review, a summary of the prerequisites for mammalian extracellular vesicles to serve as delivery vehicles will be given. After that, we will concentrate on providing a thorough overview of the studies investigating the interactions of plant-derived nanoparticles with mammalian systems as well as the loading strategies for encapsulating therap…
Population divergence in maternal investment and embryo energy use and allocation suggests adaptive responses to cool climates
2023
1. The thermal sensitivity of early life stages can play a fundamental role in constraining species distributions. For egg-laying ectotherms, cool temperatures often extend development time and exacerbate developmental energy cost. Despite these costs, egg laying is still observed at high latitudes and altitudes. How embryos overcome the developmental constraints posed by cool climates is crucial knowledge for explaining the persistence of oviparous species in such environments and for understanding thermal adaptation more broadly. 2. Here, we studied maternal investment and embryo energy use and allocation in wall lizards spanning altitudinal regions, as potential mechanisms that enable su…
La inscripción de la ciudadanía en la cuba neocolonial (1902-1919) : Sucinta referencia histórico-jurídica
2021
This historical-legal account brieflycovering 17 years of civil registration activity carried out during the neocolonial period by Municipal Judges and Secretaries, specifically that related to registration of Cuban citizens)becomes considerably relevant to understand and to godeeper into the origins of this complex process, as well asto achieve a re-encounter with the history of those who passed through those times, currently a hidden history in the shadows of Civil Registration offices, but still alive and thus allowing us to find all the beauty that there was in it.
La performance delle imprese incubate nel Consorzio ARCA nel periodo 2003 – 2011: talune valutazioni sull’efficacia degli incubatori di imprese
2014
The Paper presents an analysis of the performance of the startups promoted by business incubator at the University of Palermo, providing a contribution to the debate on the "third mission" of the university and the creation of favorable conditions for its implementation. Il Paper presenta un'analisi delle performance delle imprese promosse dall'incubatore di imprese dell'Università di Palermo, fornendo un contributo al dibattito sulla "terza missione" dell'università e sulla creazione di condizioni favorevoli alla sua realizzazione.
El ocaso de un gremio: San Eloy de Santiago de Compostela en el siglo XIX
2021
El presente artículo tiene como objetivo la reconstrucción de la historia del gremio de San Eloy de Santiago de Compostela en el siglo XIX, tema sobre el que todavía no existe ningún estudio. La metodología de nuestra investigación se ha centrado en primer lugar en analizar la bibliografía publicada sobre la desintegración del sistema gremial en España, motivada por el paradigma filosófico de la Ilustración y la liberalización del trabajo. Para aplicarlo al caso de Compostela y en concreto a los plateros, el segundo paso fue el vaciado de los libros consistoriales y las matrículas industriales del Archivo Histórico Universitario de Santiago, fuentes complementadas por los Anuarios de Comerc…