Search results for "Generation"
showing 10 items of 3050 documents
Gametic embryogenesis and haploid technology as valuable support to plant breeding
2011
Plant breeding is focused on continuously increasing crop production to meet the needs of an ever-growing world population, improving food quality to ensure a long and healthy life and address the problems of global warming and environment pollution, together with the challenges of developing novel sources of biofuels. The breeders' search for novel genetic combinations, with which to select plants with improved traits to satisfy both farmers and consumers, is endless. About half of the dramatic increase in crop yield obtained in the second half of the last century has been achieved thanks to the results of genetic improvement, while the residual advance has been due to the enhanced managem…
ChemInform Abstract: Electron Crystallography and Organic Materials with Non-Linear Optical Properties
2010
Results of electron microscopic studies of crystal structures of a number of bis-benzylidene cyclohexanones are presented. It is shown that some of these compounds are efficient crystalline non-linear optically active (NLO) chromophores with second harmonic generation (SHG) properties. Appropriately functionalized chromophores of this type can be used as a polycondensation comonomer to produce partly crystalline main-chain NLO-active polymers. Electron diffraction crystal structural data, obtained for very small crystals, allowed us to get reasonable estimations of macroscopic crystal NLO-coefficients, relating quantum-chemically calculated molecular first hyperpolarizability components to …
Quadratic Nonlinear Behaviour of Various Langmuir-Blodgett Molecules
1989
The Langmuir-Blodgett (L-B) technique is well known as a method of building-up ordered arrays of organic molecules, and especially as a means of imposing a noncentrosymmetric structure from molecules that crystallize in a centrosymmetric space group(1–3). L-B films for use in quadratic nonlinear optics can be ordered in a statistically noncentrosymmetric lattice. The method involves the compression of a mono-layer of the organic molecule, spread on top of a water surface, into a two-dimensional solid, followed by the repeated dipping of the substrate to be coated into and out of the subphase. Monolayers may be deposited onto the substrate both on immersion and withdrawal, resulting in a cen…
Second harmonic generation in ferroelectric liquid crystalline thiadiazole derivatives
1995
Bodies of Disorder: Gender and Degeneration in Baroja and Blasco Ibáñez
2019
Los objetos en los escenarios de la memoria: aproximaciones teóricas y análisis de ejemplos referidos a los hijos de desaparecidos en Argentina
2020
Proponemos, en primer lugar, reflexionar en torno a tres tipos de objetos vinculados a diversos escenarios de la memoria: el objeto testimonio que funciona como un código verificativo cuya primera intención consiste en certificar el acontecimiento; el objeto memoria que despliega un trabajo con la memoria de tipo reflexivo-interpretativo y/o elaborativo, y el objeto emblema que se presenta y actúa en las marchas, en las conmemoraciones, en los juicios, en las protestas y demandas articuladas en las luchas por la memoria, verdad y justicia. Focalizamos luego en el examen de un conjunto de producciones culturales realizadas por los hijos de víctimas del terrorismo de Estado desplegado en torn…
Political and relational: Autobiographical narrations of Latvian women across three generations
2005
Appropriation and restitution in the Argentinian Dictatorship's Children of the Disappeared Narratives: The missing alive
2020
Junto con el secuestro y desaparición de personas, el terrorismo de Estado en Argentina –que operó en su mayor parte durante la dictadura (1976-1983)– puso en práctica un plan sistemático para la apropiación de sus hijos, ya sea aquellos niños de poca edad que estaban con sus padres en el momento del allanamiento de la casa o los que nacían en centros clandestinos de detención, producto del secuestro de mujeres embarazadas, a las que se solía cuidar hasta dar a luz para luego ser asesinadas. Se trata de los “niños apropiados” o los “desaparecidos vivos” que las Abuelas de Plaza de Mayo procuran encontrar para devolverles su identidad primera. En este artículo exploramos, a partir de un ampl…
Perpetrators fathers: Perspectives from the sons and daughters of Argentinian repressors
2020
En el presente artículo propongo abordar la figura del perpetrador elaborada desde la mirada de los hijos e hijas de represores en Argentina, es decir la representación del “padre perpetrador”. Esta perspectiva viene a agregar un nuevo capítulo a la tradición sobre el represor que ahora es revisitada por sus propios hijos, en especial aquellos hijos/as desobedientes que reniegan y se distancian de sus padres. Nos interesa señalar la reciente creación en 2017 del colectivo Historias Desobedientes: Familiares de genocidas por la Memoria, la Verdad y la Justicia ya que constituye una nueva voz con sus peculiares aportes y demandas en las políticas y prácticas de la memoria. Si bien partimos de…
From Conservation to Revitalization. Ambiguous and Critical Conditions in the Heritage Conservation Experiences of Erice
2022
The plans and the evolutionary trends of policies and practices implemented in Erice old town, in the south of Italy, in the western part of Sicily, can be considered a case study of total conservation as highly representative of Italian urban planning of the last 60 years. This paper aims to deal with the actual problems and the perspective of sustainable development of the historical centre of Erice, by adopting the approach of urban and territorial regeneration. This paper also highlights the historical and cultural context in which the Gubbio Charter (issued in 1960) is affirmed; i.e. the most appropriate approaches to historical urban centres; what we can learn from Erice’s integral co…