Development and evaluation of novel nanofibers based on mango kernel starch obtained by electrospinning

[EN] This work reports on the development of fibers based on natural mango kernel starch (MKS) with diameters in the nanoscalse by means of the electrospinning technique. MKS was extracted from mango kernels and two synthetic polymers, namely polyvinyl alcohol (PVA) and polyvinylpyrrolidone (PVP), were blended with MKS in order to improve its spinnability, obtaining MKS/PVA and MKS/PVP fibers with a 10 wt% of total polymer concentration. Several electrospinning conditions (voltage and flux) were tested in solutions of MKS concentrations ranging from 0 to 5 wt% for both group of fibers. The morphology of all the fibers was evaluated by field emission scanning electron microscopy (FESEM) and their topography was analysed by means of atomic force microscopy (AFM). MKS/PVA nanofibers were obtained with a diameter range from 0.146 to 0.315 ¿m, with a ¿smooth fiber concentration threshold¿ of 3 wt%, while MKS/PVP, fibers with diameters from 0.080 to 0.339 ¿m were produced, but 5 wt% MKS concentration fibers were beaded fibers, as a result of an excess in starch concentration. Finally, the roughness of the optimal fibers showed quite a similar trend to that of fiber diameter, presenting roughnessess between 80 and 343 nm.This research is a part of the grant PID2020-116496RB-C22 funded by MCIN/AEI/10.13039/501100011033. Authors also thank Generalitat Valenciana-GVA, grant number AICO/2021/025 for supporting this work. J. Gomez-Caturla wants to thank Generalitat Valenciana-GVA, for his FPI grant (ACIF/2021/185) and grant FPU20/01732 funded by MCIN/AEI/10.13039/501100011033 and by ESF Investing in your future. J. Ivorra-Martinez wants to thank FPU19/01759 grant funded by MCIN/AEI/10.13039/501100011033 and by ESF Investing in your future. Microscopy Services at UPV are also acknowledged by their help in collecting and analyzing images.Gómez-Caturla, J.; Ivorra-Martinez, J.; Lascano-Aimacaña, DS.; Balart, R.; Garcia-Garcia, D.; Dominici, F.; Puglia, D.... (2022). Development and evaluation of novel nanofibers based on mango kernel starch obtained by electrospinning. Polymer Testing. 106:1-12. https://doi.org/10.1016/j.polymertesting.2021.10746211210

Measurement of urea and creatinine in saliva of dogs : a pilot study

Urea and creatinine in saliva have been reported to be possible markers of chronic kidney disease (CKD) in humans. The aim of this study was to assess if urea and creatinine could be measured in canine saliva, and to evaluate their possible changes in situations of CKD

Evaluation of various biomarkers for kidney monitoring during canine leishmaniosis treatment

Background: The objective of this study was to evaluate and compare the evolution of the profile currently recommended by the International Renal Interest Society (IRIS) (sCr, UPC and sSDMA) with a panel of other different kidney biomarkers during treatment for canine leishmaniosis. This panel included three urinary glomerular biomarkers (uIgG, uCRP and uferritin) and three urinary tubular biomarkers (uGGT, uNAG and uRBP). These biomarkers were measured in two groups of dogs with canine leishmaniosis at IRIS stage I. Group 1: dogs showing proteinuria (UPC > 0.5) before treatment which did not decrease after treatment; Group 2: dogs showing proteinuria before treatment which decreased after treatment. Results: Group 1 showed no significant changes in any biomarker after treatment. In group 2, among the biomarkers recommended by the IRIS, only UPC showed a significant decrease after treatment. However all biomarkers of glomerular damage showed a significant decrease after treatment, with uIgG/Cr and uCRP/Cr showing the greater decreases. In addition uRBP/Cr and uNAG/Cr showed significant decreases after treatment. Conclusions: In dogs with leishmaniosis at IRIS stage I that reduced UPC after treatment, there were no significant changes in serum creatinine and sSDMA. However, all the urine biomarkers evaluated with exception of uGGT showed a significant decrease. These decreases were more evident in those markers related with glomerular function, being uIgG/Cr the biomarker more associated with UPC. Further studies involving a larger number of animals and histological analysis of the kidney would be recommended to confirm these findings and evaluate the routine practical use of these urine biomarkers in canine leishmaniosis

Archaeology from mid and late Holocene in southern Patagonia: human peopling and climate fluctuations

Este trabajo busca generar un aporte al conocimiento de la dinámica poblacional de cazadores, en Patagonia meridional, durante el Holoceno medio y tardío en el marco de condiciones climáticas altamente fluctuantes. Para este fin se analizaron distintas líneas de evidencias arqueológicas provenientes de diferentes ambientes del centro-oeste de la provincia de Santa Cruz, Argentina. Se identificó una interesante variabilidad del registro arqueológico, en estrecha relación con las modificaciones ambientales registradas en el Holoceno.This article seeks to generate a contribution to the knowledge of the peopling dynamics of hunters in southern Patagonia during the middle and late Holocene within fluctuating climatic conditions. In order to do this, different archaeological evidences were analyzed from diverse environments in Santa Cruz province (Argentina). An interesting variability in the archaeological record was identified, in close relation with the environmental modifications registered in the Holocene.Fil: Cassiodoro, Gisela Eva. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires; ArgentinaFil: Rindel, Diego Damián. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; Argentina. Universidad de Buenos Aires; ArgentinaFil: Goñi, Rafael Agustín. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Sociales; Argentina. Universidad de Buenos Aires. Facultad de Filosofía y Letras; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; ArgentinaFil: Re, Anahi. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires; ArgentinaFil: Tessone, Augusto. Universidad de Buenos Aires; Argentina. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Garcia Guraieb, Solana. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; ArgentinaFil: Belardi, Juan Bautista. Universidad Nacional de la Patagonia Austral. Unidad Académica Río Gallegos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Espinosa, Silvana Laura. Universidad Nacional de la Patagonia Austral. Unidad Académica Río Gallegos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Nuevo Delaunay, Amalia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Filosofía y Letras; ArgentinaFil: Dellepiane, Juan Matias. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Sociales; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Flores Coni, Josefina. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Universidad de Buenos Aires; ArgentinaFil: Guichon, Francisco. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; ArgentinaFil: Martinez, Carla. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; Argentina. Universidad de Buenos Aires. Facultad de Filosofía y Letras; ArgentinaFil: Pasqualini, Sebastian Diego. Universidad de Buenos Aires. Facultad de Filosofía y Letras; Argentina. Secretaría de Cultura de la Nación. Dirección Nacional de Cultura y Museos. Instituto Nacional de Antropología y Pensamiento Latinoamericano; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Research advances in Risaralda. An overview of 8 experiences

I am honored to present to you this remarkable book, a testament to the invaluable research conducted in the fields of Health, Law, Engineering, and Administrative Sciences. Each chapter within these pages represents the culmination of extensive investigations carried out by dedicated scholars affiliated with the Red Universitaria de Risaralda (RUN), a network comprising 15 esteemed higher education institutions. Risaralda has emerged as a thriving hub for higher education, bolstered by its strategic geographical location, high quality of life, rich biodiversity, and competitive development. Today, Pereira ranks third in the index of university cities, with a student enrollment rate exceeding 63%. Close to 50,000 students pursue academic programs within the department. Notably, three institutions have achieved accreditation for their excellence in education, positioning Risaralda among the most competitive regions in terms of accredited academic programs. As we celebrate the 20th anniversary of the Red Universitaria de Risaralda in 2023, it is with great pride that we reflect on its pivotal role in fostering collaboration among public and private higher education institutions. Our mission has been twofold: attracting students to our region and supporting sustainable development and quality of life for our community. The mesa de investigación (research committee) has diligently coordinated the necessary actions to unite our researchers, facilitating an integrated approach to various disciplines and themes associated with the challenges faced in our region.CONTENT Introduction...................................................................................................................5 CHAPTER ONE. Tobacco Use and Social Skills in Children from Two Schools in Pereira, Colombia .......................................................................................................9 Angélica María Blanco Vanegas, Natalia Jeaneth Carmona Valencia and Ángela Liceth Pérez Rendón CHAPTER TWO. Lesbian visibility: between control and family silence.................................................35 Mireya Ospina Botero and Carolina Carmona Castilla CHAPTER THREE. New centralities in the city of Pereira, 1990-2019 .......................................................65 Cesar Augusto Castaño Galvis CHAPTER FOUR. Bibliometric analysis of scientific publications on the effect of roots on slope stability ...........................................................................................................95 Alejandro Alzate Buitrago, Raúl Alberto Gaviria Valencia, César Augusto Peñuela Meneses, Carlos Alberto Ospina Parra CHAPTER FIVE. Sustainability of local agri-food systems in a municipality of the Eje Cafetero, Colombia...............................................................................................131 Jaime Cardona Ocampo, Orlando Ospina Salazar and Julia Arredondo Botero CHAPTER SIX. Organizational strategies aimed at the Emberá Chamí unified indigenous reservation, Inamurcito community located in the municipality of Pueblo Rico, Risaralda............................................................................................................163 Carla Johana Martínez García and Yenny Marcela Vélez Herrera CHAPTER SEVEN. Psychomotor profile of children between 4 and 5 years old in the city of Pereira, Colombia ...................................................................................................199 Jhonatan Gonzalez-Santamaría and Claudia Jimena Lopez-Garcia CHAPTER EIGHT. Analysis of assembly tasks without the use of vision: an opportunity for the design of support technologies in manufacturing environments.....................217 Gustavo Adolfo Peña Marín, Carlos Andrés Quintero Diaztagle and Juan Diego Gallego Góme

Energy Estimation of Cosmic Rays with the Engineering Radio Array of the Pierre Auger Observatory

The Auger Engineering Radio Array (AERA) is part of the Pierre Auger Observatory and is used to detect the radio emission of cosmic-ray air showers. These observations are compared to the data of the surface detector stations of the Observatory, which provide well-calibrated information on the cosmic-ray energies and arrival directions. The response of the radio stations in the 30 to 80 MHz regime has been thoroughly calibrated to enable the reconstruction of the incoming electric field. For the latter, the energy deposit per area is determined from the radio pulses at each observer position and is interpolated using a two-dimensional function that takes into account signal asymmetries due to interference between the geomagnetic and charge-excess emission components. The spatial integral over the signal distribution gives a direct measurement of the energy transferred from the primary cosmic ray into radio emission in the AERA frequency range. We measure 15.8 MeV of radiation energy for a 1 EeV air shower arriving perpendicularly to the geomagnetic field. This radiation energy -- corrected for geometrical effects -- is used as a cosmic-ray energy estimator. Performing an absolute energy calibration against the surface-detector information, we observe that this radio-energy estimator scales quadratically with the cosmic-ray energy as expected for coherent emission. We find an energy resolution of the radio reconstruction of 22% for the data set and 17% for a high-quality subset containing only events with at least five radio stations with signal.Comment: Replaced with published version. Added journal reference and DO

Clinical and structural brain correlates of hypomimia in early-stage Parkinson's disease

Altres ajuts: acord transformatiu CRUE-CSICBackground and purpose: Reduced facial expression of emotions is a very frequent symptom of Parkinson's disease (PD) and has been considered part of the motor features of the disease. However, the neural correlates of hypomimia and the relationship between hypomimia and other non-motor symptoms of PD are poorly understood. Methods: The clinical and structural brain correlates of hypomimia were studied. For this purpose, cross-sectional data from the COPPADIS study database were used. Age, disease duration, levodopa equivalent daily dose, Unified Parkinson's Disease Rating Scale part III (UPDRS-III), severity of apathy and depression and global cognitive status were collected. At the imaging level, analyses based on gray matter volume and cortical thickness were used. Results: After controlling for multiple confounding variables such as age or disease duration, the severity of hypomimia was shown to be indissociable from the UPDRS-III speech and bradykinesia items and was significantly related to the severity of apathy (β = 0.595; p < 0.0001). At the level of neural correlates, hypomimia was related to motor regions brodmann area 8 (BA 8) and to multiple fronto-temporo-parietal regions involved in the decoding, recognition and production of facial expression of emotions. Conclusion: Reduced facial expressivity in PD is related to the severity of symptoms of apathy and is mediated by the dysfunction of brain systems involved in motor control and in the recognition, integration and expression of emotions. Therefore, hypomimia in PD may be conceptualized not exclusively as a motor symptom but as a consequence of a multidimensional deficit leading to a symptom where motor and non-motor aspects converge