Robot salamandra anfibio con locomoción bioinspirada

anfibio con una dinámica de movimiento bioinspirada en la locomoción de la salamandra (Cryptobranchidae). El robot es teleoperado mediante una aplicación para dispositivos móviles (Smartphones, tablets, etc.). Se propone una estructura que permita al robot llevar a cabo dos acciones: caminar y nadar. Los movimientos de una salamandra real se han estimado basándose en una cámara cenital y se ha diseñado un algoritmo de control de locomoción que replique esos movimientos. El desempeño del robot se ha evaluado utilizando como métrica el error cuadrático medio entre el movimiento del robot y de la salamandra obteniendo errores menores al 5 % en los ángulos de movimiento de la espina dorsal. // This paper presents the development of an amphibious robot with a motion dynamics bioinspired on the locomotion of the salamander (Cryptobranchidae). The robot is teleoperated by an application for handled devices. We propose a structure to perform two different motions: walk and swim. We extract the movements from a real salamander by a zenith camera, and a locomotion control algorithm is designed to reply this movements. We evaluate the performance of the robot in comparison with the real animal movements using the RMSE (Root Mean Square Error) as metric of evaluation. We obtain errors less than 5 % in the angles of backbone movement

Use of natural phenols as feed supplements with antioxidant effects on poultry products

The oxidation of lipids is the main cause of nutritional and organoleptic deterioration of bird´s meat and eggs. This process originates compounds responsible for unpleasant odours, reduces the amount of polyunsaturated fatty acids, vitamins and pigments, decreases the acceptability on consumers and generates compounds that may present toxicity. Dietary supplementation is a simple strategy to include compounds in animal tissues. Synthetic antioxidants are regularly supplemented in poultry. However, recently, it has increased the search for replacing those compounds for others of a natural origin. This work evaluates the potential use of natural phenols (main components of essential oils) as diet supplement antioxidant agents. Firstly, we evaluated the effects of thymol and carvacrol on the delay of oxidative deterioration in domestic chicken muscle samples storage at 4°C for 0, 5 and 10 days, and in comparison with BHT (a synthetic antioxidant compound massively used). The results show that supplementation with the 3 compounds were equally effective to delay the lipid oxidation of peroneus longus samples with no significant effects on pectoralis major. Quail diet supplementation with thymol or isoeugenol did not show significant changes in meat samples, however, the oxidation levels of fresh egg-yolk samples were affected. Isoeugenol showed a yolk antioxidant effect of similar magnitude than BHT suggesting a protective effect of that phenol during the formation of the oocyte. Thymol showed intermediate effects. Results suggest that the level of lipid oxidation protection is dependent on the species and the type and age of the product. Secondly, we assess the effects of thymol and isoeugenol supplementation on liver and egg yolk fatty acid composition. Thymol increased total unsaturated liver fatty acids compared to isoeugenol, BHT and control samples. Isoeugenol increased palmitoleic acid in yolk samples compared to BHT and controls, with thymol showing intermediate results. Interestingly, BHT samples, showed a non expected increased in the saturated/unsaturated ratio. The results suggest the usefulness of natural phenols to delay lipid oxidation. The findings may be considered relevant from a human nutritional and avian biology point of view because phenol supplementation could affect reproductive and embryonic development.Fil: Marín, Raúl Héctor. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales; Argentina.Fil: Marín, Raúl Héctor. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil: Luna, Agustín. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales; Argentina.Fil: Luna, Agustín. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil Lábaque, María C. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales; Argentina.Fil: Lábaque, María C. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil: Zygadlo, Julio A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas Físicas y Naturales; Argentina.Fil: Zygadlo, Julio A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Otras Ciencias Veterinaria

Nanoparticles obtained by confined impinging jet mixer: poly(lactide-co-glycolide) vs. Poly-ε-caprolactone

This paper is focused on the production and characterization of polymeric nanoparticles obtained by nanoprecipitation. The method consisted of using a confined impinging jet mixer (CIJM), circumventing high-energy equipment. Differences between the use of poly-ε-caprolactone (PCL) and poly(lactide-co-glycolide) (PLGA) as concerns particle mean size, zeta potential, and broad-spectrum antibiotic florfenicol entrapment were investigated. Other analyzed variables were polymer concentration, solvent, and anti-solvent flow rates, and antibiotic initial concentration. To our knowledge, no data were found related to PLGA and PCL nanoparticles comparison using CIJM. Also, florfenicol encapsulation within PCL or PLGA nanoparticles by nanoprecipitation has not been reported yet. The complexity of the nanoprecipitation phenomena has been confirmed, with many relevant variables involved in particles formation. PLGA resulted in smaller and more stable nanoparticles with higher entrapping of florfenicol than PCL.Fil: Turino, Ludmila Noelia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Stella, Barbara. Università di Torino; ItaliaFil: Dosio, Franco. Università di Torino; ItaliaFil: Luna, Julio Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Santa Fe. Instituto de Desarrollo Tecnológico para la Industria Química. Universidad Nacional del Litoral. Instituto de Desarrollo Tecnológico para la Industria Química; ArgentinaFil: Barresi, Antonello A.. Politecnico di Torino; Itali

Caracterización de los áridos del río dos mangas y cantera del cerro el tablazo de la provincia de Santa Elena para utilizarlo como material de construcción

The work that is presented in this project contains information about the arids extracted from the quarry of the hill El Tablazo, located in Santa Elena City, and the Dos Mangas river, located in Manglaralto , the same that are used in several works of civil engineering in all the province of Santa Elena, such as bases, sub bases of roads, landfills, improvement of soils for foundations, breakwaters and manufacture of concretes and mortars. Also there is a study of the classifications of these materials, procedure that must be accomplished and applications in the field of construction. The materials extracted from the locations previously mentioned were submitted to laboratory test programs in order to determinate their properties and physic and mechanical characteristics and then establish if they are suitable for use it in the construction of sub bases of roads and landfills evaluating them according the specifications MOP - 001F - 2002

Robot salamandra anfibio con locomoción bioinspirada

This paper presents the development of an amphibious robot with a motion dynamics bioinspired on the locomotion of the salamander (Cryptobranchidae). The robot is teleoperated by an application for handled devices. We propose a structure to perform two different motions: walk and swim. We extract the movements from a real salamander by a zenith camera, and a locomotion control algorithm is designed to reply this movements. We evaluate the performance of the robot in comparison with the real animal movements using the RMSE (Root Mean Square Error) as metric of evaluation. We obtain errors less than 5 % in the angles of backbone movement.En este artículo se presenta el desarrollo de un robot anfibio con una dinámica de movimiento bioinspirada en la locomoción de la salamandra (Cryptobranchidae). El robot es teleoperado mediante una aplicación para dispositivos móviles (Smartphones, tablets, etc.). Se propone una estructura que permita al robot llevar a cabo dos acciones: caminar y nadar. Los movimientos de una salamandra real se han estimado basándose en una cámara cenital y se ha diseñado un algoritmo de control de locomoción que replique esos movimientos. El desempeño del robot se ha evaluado utilizando como métrica el error cuadrático medio entre el movimiento del robot y de la salamandra obteniendo errores menores al 5 % en los ángulos de movimiento de la espina dorsal

Evolution of the threshold temperature definition of a heat wave vs. evolution of the minimum mortality temperature: a case study in Spain during the 1983–2018 period

An area of current study concerns analysis of the possible adaptation of the population to heat, based on the temporal evolution of the minimum mortality temperature (MMT). It is important to know how is the evolution of the threshold temperatures (Tthreshold) due to these temperatures provide the basis for the activation of public health prevention plans against high temperatures. The objective of this study was to analyze the temporal evolution of threshold temperatures (Tthreshold) produced in different Spanish regions during the 1983–2018 period and to compare this evolution with the evolution of MMT. The dependent variable used was the raw rate of daily mortality due to natural causes ICD X: (A00-R99) for the considered period. The independent variable was maximum daily temperature (Tmax) during the summer months registered in the reference observatory of each region. Threshold values were determined using dispersion diagrams (annual) of the prewhitened series of mortality temperatures and Tmax. Later, linear fit models were carried out between the different values of Tthreshold throughout the study period, which permitted detecting the annual rate of change in Tthreshold.This research project was funded by the Carlos III Health Institute (ISCIII) under file number ENPY 470/19 and is supported by the Biodiversity Foundation of the Ministry for Ecological Transition and Demographic Challenge, in addition to the research projects ISCIII: ENPY107/18 and ENPY 376/1

Short Duration of Antibiotic Therapy in Hospitalized Patients with Community-Acquired Pneumonia: Results from the CAPO International Cohort Study

Introduction: Experts suggest a short duration of antibiotic therapy (DOT) in responding patients with community-acquired pneumonia (CAP). The aim of this study was to evaluate clinical outcomes after hospital discharge among patients treated with short-course antibiotic therapy (SCT) vs. long-course antibiotic therapy (LCT) for CAP. Methods: A secondary analysis of the Community-Acquired Pneumonia Organization (CAPO) database from January 2007 to June 2013 was performed, including hospitalized CAP patients who reached clinical stability within 5 days. Two groups were identified: patients who were treated with antibiotic therapy for a total duration of 5 days or less (SCT Group) vs. longer than 5 days (LCT Group). Rehospitalization and mortality were evaluated at 30 days after discharge. Results: 1,849 patients were enrolled (58% males; median age: 65 years), 179 (10%) were included in the SCT and 1,670 (90%) in the LTC group. Median DOT was 5 days in the SCT and 10 days in the LTC group, p Conclusions: A duration of antibiotic therapy of ≤ 5 days does not adversely impact clinical outcomes at 30-days after discharge compared to \u3e5 days in patients who reached early clinical stability

Dramatic change in the boundary layer in the symbiotic recurrent nova T Coronae Borealis

A sudden increase in the rate at which material reaches the most internal part of an accretion disk, i.e., the boundary layer, can change its structure dramatically. We have witnessed such a change for the first time in the symbiotic recurrent nova T CrB. Our analysis of XMM-Newton, Swift Burst Alert Telescope (BAT)/X-Ray Telescope (XRT)/UltraViolet Optical Telescope (UVOT), and the American Association of Variable Stars Observers (AAVSO) V- and B-band data indicates that during an optical brightening event that started in early 2014 (ΔV ≈ 1.5) the following occurred: (i) the hard X-ray emission as seen with BAT almost vanished; (ii) the XRT X-ray flux decreased significantly, while the optical flux remained high; (iii) the UV flux increased by at least a factor of 40 over the quiescent value; and (iv) the X-ray spectrum became much softer and a bright, new blackbody-like component appeared. We suggest that the optical brightening event, which could be a similar event to that observed about 8 years before the most recent thermonuclear outburst in 1946, is due to a disk instability.Fil: Luna, Gerardo Juan Manuel. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; ArgentinaFil: Mukai, K.. Cresst And X-ray Astrophysics Laboratory, Nasa/gcfc; Estados UnidosFil: Sokoloski, J. L.. Columbia University; Estados UnidosFil: Nelson, T.. University of Pittsburgh at Johnstown; Estados UnidosFil: Kuin, P.. University College London; Estados UnidosFil: Segreto, A.. Inaf-istituto Di Astrofisica Spaziale E Fisica Cosmica; ItaliaFil: Cusumano, Julio Ricardo. Inaf-istituto Di Astrofisica Spaziale E Fisica Cosmica; ItaliaFil: Jaque Arancibia, Marcelo Daniel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; ArgentinaFil: Nuñez, Natalia Edith. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio. Universidad Nacional de San Juan. Instituto de Ciencias Astronómicas, de la Tierra y del Espacio; Argentin

Efectos de la suplementación dietaria con isoeugenol y timol sobre el comportamiento de codornices adultas

Fil: Labaque, María C. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencia y Tecnología de los Alimentos; Argentina.Fil: Labaque, María C. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil: Labaque, María C. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Kembro, Jackelyn M. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencia y Tecnología de los Alimentos; Argentina.Fil: Kembro, Jackelyn M. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil: Kembro, Jackelyn M. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Luna, Agustín. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencia y Tecnología de los Alimentos; Argentina.Fil: Luna, Agustín. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil: Luna, Agustín. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Zygadlo, Julio A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencia y Tecnología de los Alimentos; Argentina.Fil: Zygadlo, Julio A. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil: Zygadlo, Julio A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Marin, Raúl H. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencia y Tecnología de los Alimentos; Argentina.Fil: Marin, Raúl H. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil: Marin, Raúl H. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Las aves de granja se ven sujetas a situaciones de miedo y/o estrés que son inevitables durante las prácticas rutinarias de cría. La suplementación dietaria con productos naturales de tipo antiestrés puede ser una estrategia simple y conveniente para reducir el impacto de esas situaciones. En estudios in vitro, el timol (componente principal del AE de orégano) ha mostrado ser capaz de modular la actividad GABAérgica y, en consecuencia, podría in vivo reducir la temerosidad/ansiedad de las aves que lo consumen.Fil: Labaque, María C. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencia y Tecnología de los Alimentos; Argentina.Fil: Labaque, María C. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil: Labaque, María C. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Kembro, Jackelyn M. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencia y Tecnología de los Alimentos; Argentina.Fil: Kembro, Jackelyn M. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil: Kembro, Jackelyn M. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Luna, Agustín. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencia y Tecnología de los Alimentos; Argentina.Fil: Luna, Agustín. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil: Luna, Agustín. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Zygadlo, Julio A. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencia y Tecnología de los Alimentos; Argentina.Fil: Zygadlo, Julio A. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil: Zygadlo, Julio A. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Fil: Marin, Raúl H. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Ciencia y Tecnología de los Alimentos; Argentina.Fil: Marin, Raúl H. Universidad Nacional de Córdoba. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones Biológicas y Tecnológicas; Argentina.Fil: Marin, Raúl H. Universidad Nacional de Córdoba. Facultad de Ciencias Exactas, Físicas y Naturales; Argentina.Otros Tópicos Biológico

Personality Disorders and Health Problems Distinguish Suicide Attempters from Completers in a Direct Comparison

Background Whether suicide attempters and completers represent the same population evaluated at different points along a progression towards suicide death, overlapping populations, or completely different populations is a problem still unresolved. Methods 446 Adult suicide attempters and knowledgeable collateral informants for 190 adult suicide probands were interviewed. Sociodemographic and clinical data was collected for both groups using semi-structured interviews and structured assessments. Univariate analyses and logistic regression models were conducted to explore the similarities and differences between suicide attempters and completers. Results Univariate analyses yielded significant differences in sociodemographics, recent life events, impulsivity, suicide intent, and distribution of Axis I and II disorders. A logistic regression model aimed at distinguishing suicide completers from attempters properly classified 90% of subjects. The most significant variables that distinguished suicide from attempted suicide were the presence of narcissistic personality disorder (OR=21.4; 95% CI=6.8–67.7), health problems (OR=20.6; 95% CI=5.6–75.9), male sex (OR=9.6; 95% CI=4.42–20.9), and alcohol abuse (OR=5.5; 95% CI=2.3–14.2). Limitations Our study shares the limitations of studies comparing suicide attempters and completers, namely that information from attempters can be obtained from the subject himself, whereas the assessment of completers depends on information from close family or friends. Furthermore, different semi-structured instruments assessed Axis I and Axis II disorders in suicide attempters and completers. Finally, we have no data on inter-rater reliability data. Conclusions Suicide completers are more likely to be male and suffer from alcohol abuse, health problems (e.g. somatic illness), and narcissistic personality disorder. The findings emphasize the importance of implementing suicide prevention programs tailored to suicide attempters and completers