Conjugated Polymers for Organic Electronics: Structural and Electronic Characteristics

The use of organic materials to design electronic devices has actually presented a broad interest for because they constitute an ecological and suitable resource for our current "electronic world". These materials provide several advantages (low cost, light weight, good flexibility and solubility to be easily printed) that cannot be afforded with silicium. They can also potentially interact with biological systems, something impossible with inorganic devices. Between these materials we can include small molecules, polymers, fullerenes, nanotubes, graphene, other carbon-based molecular structures and hybrid materials. Actually these materials are being used to build electronic structures into electronic devices, like organic light-emitting diodes (OLEDs), organic solar cells (OSCs), and organic field-effect transistors (OFETs), constituting and already commercial reality. Some of them are used on a widespread basis1, and are the focus of some recent researches in molecules2,3 and polymers4-6 suitable for these purposes. In this study we analyze the electronic and molecular characteristics of some different π-conjugated structures in order to evaluate their potential as semiconducting materials for organic electronics. For this purpose we focus on the study of conjugated polymers with different backbones configurations: (i) donor-acceptor configuration, (ii) 1D lineal or 2D branched conjugated backbones, and (iii) encapsulated polymers. To achieve this goal, we use a combined experimental and theoretical approach that includes electronic spectroscopies (i.e., absorption, emission and microsecond transient absorption), vibrational Raman spectroscopy and DFT calculations. These structural modifications are found to provoke a strong impact on the HOMO and LUMO levels and the molecular morphology, and, consequently, on their suitability as semiconductors in organic electronic applications.References 1. S. R. Forrest, M. E. Thompson. Chem. Rev., 2007, 107, 923 2. R. C. González-Cano, G. Saini, J. Jacob, J. T. López Navarrete, J. Casado and M. C. Ruiz Delgado. Chem. Eur. J. 2013, 19, 17165 3. J. L. Zafra, R. C. González-Cano, M. C. Ruiz Delgado, Z. Sun, Y. Li, J. T. López Navarrete, J. Wu and J. Casado. J. Chem. Phys. , 2014, 140, 054706 4. M. Goll, A. Ruff, E. Muks, F. Goerigk, B. Omiecienski, I. Ruff, R. C. González-Cano, J. T. López Navarrete, M. C. Ruiz Delgado, S. Ludwigs. Beilstein J. Org. Chem., 2015, 11, 335. 5. D. Herrero-Carvajal, A. de la Peña, R. C. González-Cano, C. Seoane, J. T. López Navarrete, J. L. Segura, J. Casado, M. C. Ruiz Delgado, J. Phys. Chem. C, 2014, 118, 9899. 6. M. Scheuble, Y. M. Gross, D. Trefz, M. Brinkmann, J. T. López Navarrete, M. C. Ruiz Delgado, and S. Ludwigs, Macromolecules, 2015, 48, 7049.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Descripción de los estados inmaduros de Macracanthopyga verganiana Lizer y Trelles (Hemiptera: Coccoidea: Eriococcidae)

Se describe el segundo estadio ninfal y se redescribe el primer estadio ninfal de Macracanthopyga verganiana Lizer y Trelles. Se discute brevemente las afinidades de M. verganiana con otras especies de eriocóccidos sudamericanos.The second instar nymph of Macracanthopyga verganiana is described and the first instar nymph is redescribed. A brief discussion on the affinities of M. verganiana with other species of South American eriococcids is given

Two new species of Acanthococcus Signoret (Hemiptera: Coccoidea: Eriococcidae) on Asteraceae from Argentina

Se describen e ilustran las hembras adultas de dos especies nuevas de Acanthococcus Signoret (Hemiptera: Coccoidea: Eriococcidae), Acanthococcus julietae González y Granara de Willink sp. nov. y A. saltensis González y Granara de Willink sp. nov. y los estados ninfales de la última. Se presenta una clave para separar las especies de Eriococcidae reportados sobre Asteraceae de la Argentina.The adult females of two new species of Acanthococcus Signoret, Acanthococcus julietae González and Granara de Willink and A. saltensis González and Granara de Willink are described and illustrated, also the nymphal instars of the latter species is described. A key to separate the Eriococcidae occurring on Asteraceae in Argentina is presented

Descripción de la flora causante de candidemia en pacientes adultos críticamente enfermos y determinación de los factores de riesgo relacionados en las unidades de cuidado intensivo del Hospital Militar Central en los años 2006 a 2011

El presente proyecto de investigación busca describir la distribución epidemiológica de las diferentes especies de Cándida spp, causantes de candidemia en los pacientes adultos ingresados a las Unidades de Cuidado Intensivo del Hospital Militar Central durante los años 2006 a 2011. Se trata de una investigación de diseño descriptivo analítico retrospectivo a realizarse mediante la revisión y recolección de datos de las historias clínicas de los pacientes con hemocultivos positivos para cándida de acuerdo con los registros de la sección de Microbiología del Laboratorio Clínico del HM

Generic communication in parallel computation

The design of parallel programs requires fancy solutions that are not present in sequential programming. Thus, a designer of parallel applications is concerned with the problem of ensuring the correct behavior of all the processes that the program comprises. There are different solutions to each problem, but the question is to find one, that is general. One possibility is allowing the use of asynchronous groups of processors. We present a general methodology to derive efficient parallel divide and conquer algorithms. Algorithms belonging to this class allow the arbitrary division of the processor subsets, easing the opportunities of the underlying software to divide the network in independent sub networks, minimizing the impact of the traffic in the rest of the network in the predicted cost. This methodology is defined by OTMP model and its expressiveness is exemplified through three divide and conquer programs.Eje: IV - Workshop de procesamiento distribuido y paraleloRed de Universidades con Carreras en Informática (RedUNCI

Osteomalacia as an extraintestinal manifestation of Celiac disease in a patient treated for Gaucher disease

Gaucher disease (GD) is the most prevalent lysosomal storage disorder. Bone marrow infiltration by Gaucher cells and the subsequent inflammatory events cause bone lesions, which frequently accompany anemia, thrombocytopenia, and hepatosplenomegaly. We present the case of a 22-year old woman with GD who was referred for bone assessment after 5 years on enzyme replacement therapy (ERT). Although the patient´s hematological parameters improved with ERT showing good response to treatment, she had extensive bone marrow infiltration, and very low bone density. In addition, the patient reported severe bone pain, weakness, and difficulties walking up the stairs. Bone and mineral metabolism assessment showed hypocalcemia, hypophosphatemia, elevated bone alkaline phosphatase, secondary hyperparathyroidism and vitamin D deficiency. All these parameters were compatible with nutritional osteomalacia, and they improved with vitamin D and calcium supplementation. Worsening of her anemia and sustained vitamin D deficiency led to the diagnosis of celiac disease. We highlight the importance of detecting co-morbidities in patients with GD, especially in cases showing poor or inadequate response to specific GD treatment with enzyme replacement or substrate inhibition therapy.Fil: González, Diana C.. Mautalen Salud e Investigación; ArgentinaFil: Ruiz, Alba. Hospital Cepsi Eva Perón. Servicio de Oncohematología; ArgentinaFil: Oliveri, María Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Houssay. Instituto de Inmunología, Genética y Metabolismo. Universidad de Buenos Aires. Facultad de Medicina. Instituto de Inmunología, Genética y Metabolismo; Argentin