280 research outputs found

    Towards a FPGA-controlled deep phase modulation interferometer

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    Deep phase modulation interferometry was proposed as a method to enhance homodyne interferometers to work over many fringes. In this scheme, a sinusoidal phase modulation is applied in one arm while the demodulation takes place as a post-processing step. In this contribution we report on the development to implement this scheme in a fiber coupled interferometer controlled by means of a FPGA, which includes a LEON3 soft-core processor. The latter acts as a CPU and executes a custom made application to communicate with a host PC. In contrast to usual FPGA-based designs, this implementation allows a real-time fine tuning of the parameters involved in the setup, from the control to the post-processing parameters.Comment: Proceedings of the X LISA Symposium, Gainesville, May 18-23, 201

    Closing the cycle for the cut rose industry by the reuse of its organic wastes: A case study in Ecuador

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    The soil conditions and the yield and quality of Rosa sp. var. Freedom were determined following the incorporation into the soil of rose waste composts, with or without fertigation; the effects of these treatments were compared with those of non-stabilised chopped rose wastes þ fertigation (FWF). The growing conditions were those of a commercial greenhouse. The use of the composts, alone or combined with fertigation, increased the available P and K contents of the soil with respect to FWF. However, only the compost þ fertigation treatments improved, in general, the soil fertility regarding the organic matter (OM), nitrogen and available micronutrient concentrations, in comparison to FWF. When the composts were added alone, irrigation with alkaline water increased the soil pH and, in consequence, reduced the availability of micronutrients. Overall, the combined use of compost and fertigation increased the cut rose yield and quality relative to the application of compost alone and FWF. Principal component analysis indicated that the OM, available Cu, Mn and Zn and total N contents and the pH of the soil were the principal soil parameters determining the yield and quality of the roses. This analysis classified the treatments in three groups: the compost þ fertigation treatments; the treatments with compost alone; and the FWF treatment. The compost þ fertigation treatments gave the highest net income (average for these treatments ¼ 80388.92 US dollars ha 1). Therefore, the compost þ fertigation treatments were highly beneficial with regard to increasing soil fertility and cut rose yield, quality and profitability

    Coordinate-Space Hartree-Fock-Bogoliubov Description of Superfluid Fermi Systems

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    Properties of strongly interacting, two-component finite Fermi systems are discussed within the recently developed coordinate-space Hartree-Fock-Bogoliubov (HFB) code {\hfbax}. Two illustrative examples are presented: (i) weakly bound deformed Mg isotopes, and (ii) spin-polarized atomic condensates in a strongly deformed harmonic trap.Comment: 4 pages, 2 figures, ENAM 2008 conference proceedings (EPJA

    El diagnóstico preimplantacional con fines terapéuticos para terceros: una aproximación biojurídica

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    En los últimos años, el desarrollo biotecnológico ha permitido que circunstancias que hace varias décadas no tenían posibilidad material de desarrollarse, hoy sean una realidad. Desde el nacimiento del primer bebé mediante fecundación in vitro en 1978, por medio del avance científico, han ido surgiendo otros procedimientos en materia reproductiva que, cada vez, consiguen mayores intervenciones en la generación de vida humana.Los avances y descubrimientos logrados en Genética a raíz de los resultados del Proyecto Genoma Humano (PGH), no solo han tenido impacto en la investigación científica por la información que ahora se conoce, sino que estos conocimientos, sumados al desarrollo de tecnologías reproductivas, permiten la realización de estudios que analizan genéticamente a los embriones preimplantatorios para que, a partir de los resultados obtenidos, se pueda determinar su continuidad de vida según los criterios que se persigan

    Hydrophilic and lipophilic radiopharmaceuticals as tracers in pharmaceutical development: In vitro – In vivo studies

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    BACKGROUND: Scintigraphic studies have been performed to assess the release, both in vitro and in vivo, of radiotracers from tablet formulations. Four different tracers with differing physicochemical characteristics have been evaluated to assess their suitability as models for drug delivery. METHODS: In-vitro disintegration and dissolution studies have been performed at pH 1, 4 and 7. In-vivo studies have been performed by scintigraphic imaging in healthy volunteers. Two hydrophilic tracers, ((99m)Tc-DTPA) and ((99m)Tc-MDP), and two lipophilic tracers, ((99m)Tc-ECD) and ((99m)Tc-MIBI), were used as drug models. RESULTS: Dissolution and disintegration profiles, differed depending on the drug model chosen. In vitro dissolution velocity constants indicated a probable retention of the radiotracer in the formulation. In vivo disintegration velocity constants showed important variability for each radiopharmaceutical. Pearson statistical test showed no correlation between in vitro drug release, and in vivo behaviour, for (99m)Tc-DTPA, (99m)Tc-ECD and (99m)Tc-MIBI. High correlation coefficients were found for (99m)Tc-MDP not only for in vitro dissolution and disintegration studies but also for in vivo scintigraphic studies. CONCLUSION: Scintigraphic studies have made a significant contribution to the development of drug delivery systems. It is essential, however, to choose the appropriate radiotracers as models of drug behaviour. This study has demonstrated significant differences in release patterns, depending on the model chosen. It is likely that each formulation would require the development of a specific model, rather than being able to use a generic drug model on the basis of its physicochemical characteristics

    Pinto Bean Cultivars Blackfoot, Nez Perce, and Twin Falls

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    Pinto bean (Phaseolus vulgaris L.) cultivars ‘Blackfoot’ (Reg. No. CV-316, PI 680632), ‘Nez Perce’ (Reg. No. CV-317, PI 680633), and ‘Twin Falls’ (Reg. No. CV-318, PI 680634) were developed at the University of Idaho, Kimberly Research and Extension Center in collaboration with researchers in Colorado, Nebraska, and Washington. Blackfoot and Nez Perce are sister cultivars derived from the same bulk population, UIP35 (USPT-CBB-1/3/‘Othello’/‘UI 906’//‘Topaz’/‘Buster’). Twin Falls was selected from the bulk population UIP40 (USPT-CBB-1/3/CO12650/USPT-ANT-1//Othello/ABL15). The F8 of both population bulks and checks were yield tested in the Western Regional Bean Trial in 2014 and 2015 and in the Cooperative Dry Bean Nursery in 2015. The three cultivars were yield tested in Idaho in 2015. They were also yield tested across nine production environments in Colorado, Idaho, Nebraska, and Washington in 2016. Blackfoot, Nez Perce, and Twin Falls are the first indeterminate erect Type II growth habit pinto bean cultivars resistant to Bean common mosaic virus (an aphid-vectored potyvirus) and bean rust developed at University of Idaho. Blackfoot has a compact Type IIA growth habit and produces little or no vine (i.e., elongated terminal axis with intertwined internodes that help the plant climb when provided support). In contrast, Nez Perce is tall and produces medium to long vines, with a Type IIB growth habit. Blackfoot has a mean maturity of 85 d and Nez Perce 95 d in southern Idaho. Twin Falls is a full-season cultivar (≥100 d) and relatively tall, with very small or no vines for climbing. The three cultivars have relatively smaller seed (100−1 seeds) than early-maturity pinto ‘Othello’ (≥35 g 100−1 seeds) in the Pacific Northwest

    Life Cycle Analysis of the panela agroindustry: Intensification for its development

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    The research made it possible to identify sensitive environmental factors generated in all the operations carried out in an intensified panela agroindustry for the purposes of diversification, productivity, quality and safety. Results of the Environmental Impact Assessment (EIA), according to the Life Cycle Analysis (LCA) methodology show that in all impact categories, the industrial stage of the production of honey, panela and sugar, cause greater environmental impact, being the two latter the most representative. However, according to the Ecuadorian environmental legislation, the impacts of the panela agroindustry are considered to be moderate and cataloged type II, therefore it does not require intensive corrective practices. However, it requires preventive actions aimed to mitigate impacts, considering that it is a subsector of the sugar cane industry that is present as production units throughout the country, where there are favorable conditions for the cultivation of sugar cane
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