bluuebunny/crossref_metadata_2025 huggingface dataset:
Live Imaging of Primary Neurons in Long-Term Cryopreserved Human Nerve Tissue
Authors: Fortea Marina , Jain Piyush , Demedts Ingrid , Tack Jan , Vanuytsel Tim , Cirillo Carla , Vanden Berghe Pieter
Published: November 2021

Tissue cryopreservation provides a convenient solution for tackling one of the major problems in neuroscience research, namely, the scarce availability of human nerve tissues, especially if needed alive. While brain tissue can be used only postmortem, live nerve tissue can reasonably well be harvested from the periphery. A valuable source of primary neurons is the intestine, which compared with brain has the advantage to be safely accessible via endoscopy. The nerve tissue innervating the intestine (the enteric nervous system; ENS) can be sampled with regular endoscopic biopsy forceps and remains viable for multiple physiological and immunohistochemical tests, as previously demonstrated. Here, we present a method to preserve, over longer periods of time, human primary neurons contained in these biopsies. The use of a cryoprotective agent and the application of controlled cooling revealed to be crucial to properly store the nerve tissue and to enable functional measurements after thawing. These primary neurons were evaluated for functionality (live imaging) and morphology (histology) up to one year after cryopreservation. Calcium (Ca2+) imaging indicated that human primary neurons remained viable and responded to selective stimulations (serotonergic and nicotinic agonists) after cryopreservation. Additionally, immunohistochemistry performed with specific neuronal markers showed that nerve structure and neuronal morphology were retained, with no signs of cellular damage. In this study, we demonstrate that the human ENS is a realistic source of primary neurons, which can be successfully preserved over long times and as such can be exploited both for gastrointestinal-specific as well as for general neuroscience research.
Meta-análisis de la asociación entre las variantes VAL66MET de BDNF, 2/3/4 de APOE y la esquizofrenia
Authors: García Riveros William , Tibana Nidya
Published: November 2021

La esquizofrenia es un trastorno mental de tipo multifactorial, por lo que su etiología aún sigue en discusión, se han determinado diversos candidatos como factores de riesgo genético al fenotipo, entre ellos los postulados en el meta-análisis, el gen APOE codifica para una proteína implicada en el trasporte de lípidos, siendo la variable e4 candidata importante a factor de riesgo para la esquizofrenia, y el polimorfismo BNDF VAL66MET implicado en alteraciones de secreción intercelular en la neurotrofina, postulado en la asociación con el trastorno. Se realizó una revisión sistemática a través de diversas bases de datos, compilando 25 estudios caso-control relacionados con la asociación de alguna de las variables a la esquizofrenia, bajo estrictos criterios de elegibilidad, a partir de ellos se determinó la asociación meta-analítica utilizando el modelo de efectos aleatorios, infiriendo la incidencia del alelo de riesgo y el genotipo portador del mismo a la esquizofrenia. Se encontró una leve asociación de la variante e4 en la etnia caucásica, por otra parte, ni el alelo Met ni el genotipo portador reflejó una asociación significativa al fenotipo, estos resultados contrastan la gran cantidad de estudios contradictorios publicados en los últimos años, estableciendo un resultado global acerca de la influencia de las variantes con el genotipo.
Aproximación a la caracterización de los docentes asesores de práctica y el desempeño de los docentes en formación
Authors: Martínez Granada Liliana , Meza Quintero Gladys
Published: November 2021

Es necesario, en estos momentos del proceso educativo, reconocer al siglo XXI como el siglo de las mega tendencias propias de la pedagogía, en este campo la práctica pedagógica se convierte en un elemento fundamental para el desarrollo de la vida profesional de los futuros licenciados, en este sentido, el artículo pretende socializar los resultados de la investigación que se realizó con el objeto de establecer la caracterización de los docentes asesores que acompañan la práctica pedagógica, en las diferentes instituciones educativas del municipio de Ibagué, que han establecido convenio con la Facultad de Ciencias de la Educación de la Universidad del Tolima, con el objeto de conocer a través de sus opiniones algunos de los factores fundamentales del desarrollo del ejercicio de la práctica, con el fin de evaluar su efectividad, impacto y replantear algunos aspectos que permitan mejorar el ejercicio de la misma. La investigación fue de tipo cuantitativo-cualitativo: mediante encuestas se recogió la información para caracterizar a los docentes asesores y mediante grupos focales se les escuchó y se recolectó la información para evaluar el ejercicio de la práctica. Conocer los avances, logros, falencias, y limitaciones permitió con base segura elaborar el plan de Mejoramiento del Ejercicio de la Práctica docente en la Universidad y reorientar su proceso.
Mejora de la comprensión de lectura a través de estrategias de aprendizaje directo
Authors: Martínez Granada Liliana , Acosta Rubiano Deyssi
Published: November 2021

Este artículo muestra los resultados de un proyecto de investigación relacionado con la aplicación de algunos talleres en los que las estrategias directas de aprendizaje (resaltar, toma de apuntes, de agrupación, asociación, mapeo semántico y de resumen) que fueron enseñadas e implementadas con los estudiantes de un colegio oficial de bachillerato urbano de Ibagué, durante el primer semestre de 2014 para mejorar la comprensión de lectura en inglés. La población de este estudio estaba conformada por estudiantes de noveno grado; uno de los grupos fue el experimental y el otro el grupo de control. Los datos fueron recolectados a través de: Una prueba diagnóstica, talleres de lectura en concordancia con las estrategias que se habían seleccionado y finalmente una prueba de progreso. Los resultados de esta investigación mostraron que de las estrategias implementadas sobresalieron: resaltar, toma de notas y asociación. Esto se debió a que estas estrategias no solo ayudaron a los estudiantes a entender mejor lo que leían, les hicieron sentir más cómodos y deseosos de participar, sino que además cambiaron la actitud frente al proceso lectura en inglés.
Modelo de gestión de carteras de Markowitz usando algorietmos genéticos
Authors: Arévalo González Santiago
Published: November 2021

Con su artículo de 1952, Harry Markowitz simplificó notablemente el problema de selección de inversiones en el mercado accionario. En este artículo se introduce al lector en la propuesta de Markowitz y se propone un algoritmo genético para deducir la combinación de dos activos (cartera), que obtenga la más alta rentabilidad para su inversión y al mismo tiempo obtener el menor riesgo. En la última parte se aplica el algoritmo genético en dos casos de estudio reales con registros mensuales obtenidos entre 2009 y 2013.
Sistemas flexibles de manufactura para entornos académicos como respuesta al desarrollo tecnológico de las pymes en Colombia
Authors: Ortega Cabrera Jhon Brian
Published: November 2021

Tomando como epicentro el Laboratorio de CNC (Control Numérico Computarizado) y Robótica de la Universidad Distrital Francisco José de Caldas – Facultad Tecnológica, se desarrolló la mejor alternativa para la educación en manufactura altamente industrializada, bajo entornos reales de trabajo, a través del diagnóstico de los principales componentes tecnológicos de un FMS (Sistema Flexible de Manufactura), la selección de las principales estaciones de trabajo de una fábrica y la relación de este entorno de trabajo con el hombre dentro de un área determinada, con el propósito de preparar profesionales que den soluciones a las preguntas, variabilidades y retos que se presentan en los procesos productivos de las industrias emergentes desde un enfoque investigativo, innovador, competitivo, amigable y rentable para todos los actores de la cadena de producción y de consumo.
Alfabetización científica y tecnológica en las instituciones educativas de básica y media y el desarrollo de pensamiento crítico, lógico y matemático como factor generador de una industria de software en Colombia
Authors: Gómez Castaño Floralba , Contreras Castro Mario , Bohórquez Pastor Martín , Ruiz Díaz Yadira
Published: November 2021

Este proyecto de investigación reconoce la importancia de identificar, caracterizar los procesos de formación en el área de Tecnología e Informática y el nivel de desarrollo del pensamiento crítico y lógico matemático que suscita en los estudiantes de básica y media de las instituciones educativas ubicadas dentro de las regiones de influencia de los Centros de Atención Universitaria, -CAU- de la Vicerrectoría de Universidad Abierta y a Distancia de la Universidad Santo TomásLa metodología para el desarrollo del proyecto se enmarca en el enfoque cualitativo, tomando como base el estudio de naturaleza aplicada y de tipo descriptivo, en tanto tiene el propósito de caracterizar y describir sistemáticamente los hechos y características de una población.En el transcurso de la investigación se retoman documentos nacionales e internacionales: “Standards For Technological Literacy” publicados por el International Technology Education Association ITEA en el 2007, donde se determinan las recomendaciones centrales para la implementación de una Alfabetización Tecnológica; El MEN en su documento “ser competente en tecnología - una necesidad para el desarrollo”, también establece las pautas de formación y competencias que se deben desarrollar en el área de “tecnología e informática” en la educación básica y media; igualmente tenidas en cuenta en esta investigación.
Estado de conservación de los manglares del Caribe colombiano y su potencial en productos forestales no maderables
Authors: García Yennifer , Cortes Castillo Denisse Viviana
Published: November 2021

Los manglares son ecosistemas boscosos ubicados en la zona transicional entre el continente y el océano; su importancia radica en los bienes que ofrecen a las comunidades humanas a nivel local y por los servicios ecosistémicos que brindan a nivel local y regional. El análisis del grado de conservación que presentan estos ecosistemas, en la región Caribe de Colombia, muestra que los manglares de los departamentos de Sucre, La Guajira, Magdalena y Antioquia tienen en su mayoría condiciones de conservación aceptables; siendo Córdoba el único departamento donde esta formación boscosa registra buenas condiciones de conservación en varios sectores, la cual se relaciona con un mejor desarrollo estructural y mayor riqueza de especies. Se propone el uso y manejo de los manglares del departamento de Córdoba, como fuente de productos forestales no maderables, con el fin de promover la conservación de estos importantes ecosistemas, e incentivar el desarrollo sostenible de las comunidades que dependen de estos ambientes.
Inclusión social vs responsabilidad social impacto que proporciona en procesos de paz
Authors: León Silva Paula Andrea
Published: November 2021

En el siguiente artículo se rescatará la importancia y el concepto de inclusión, relacionándolo con el proyecto denominado Centro de Capacitación para Personas Vulnerables enfocado en Desmovilizados (CCPVD), identificando la responsabilidad social de las empresas de todos los sectores económicos frente a la inclusión social, en este caso con relación a los diferentes actores involucrados en el actual proceso de paz firmado por el gobierno colombiano con el grupo insurgente de las Farc. Tomando como punto de partida, los procesos de paz firmados por otros países como: Honduras, Salvador, Perú y México; donde se resalta, que para cumplir el objetivo, de proceso de paz, se deben mantener de manera constante, diálogos para pactar y establecer diferentes aspectos que influyan en el momento de la firma, haciendo énfasis en cómo se ha manifestado la responsabilidad social empresarial (RSE), en la incorporación de la población desmovilizada; siendo está excluida y discriminada por sus antecedentes judiciales, del mismo modo ha presentado de manera constante dificultades en su incorporación al momento de integrarse a un nuevo ambiente laborales. Por ello se quiere identificar las oportunidades, competencias y estrategias que han implementado diferentes gobiernos luego de la firma de procesos de paz, participación del sector productivo y educativo en el desarrollo de estrategias para afrontar el reto de incorporar a las personas en condición de reinsertadas a la vida civil.
Alternativas de integración de competitividad regional entre los departamentos de Antioquia, Magdalena y Meta, 2017
Authors: Fandiño Isaza Jesús Rafael , Ospina Penagos Albeiro , Pérez Ruiz Belma Luz , Ariza Bonilla Faber Anselmo
Published: November 2021

Desde el año 2000 la CEPAL se ha encargado de realizar el escalafón de competitividad departamental en Colombia, teniendo en cuenta los cinco pilares determinantes de la competitividad propuestos por la Comisión Económica para América Latina y el Caribe (CEPAL), a saber:  1) Gobierno e instituciones; 2) Desarrollo económico; 3) Infraestructura productiva; 4) Capital humano, y 5) Eficiencia de las empresas. Adicionalmente, desde el año 2013 el Consejo Privado de Competitividad junto con el Centro de Pensamiento en Estrategias Competitivas de la Universidad del Rosario (CEPEC), realizan el Índice Departamental de Competitividad. Estos resultados se han convertido en la base del análisis de competitividad en cada uno de los departamentos, permitiendo evaluar el progreso de las diferentes variables socioeconómicas que allí se miden. El análisis sugiere que la competitividad puede adquirir más relevancia entre los departamentos al interior de pequeños grupos, por lo que se propone alternativas de Integración de Competitividad Regional de los departamentos de Antioquia, Magdalena y Meta; pretendiendo ganar relevancia las políticas de crecimiento y desarrollo regional, con una propuesta de fortalecimiento de la infraestructura, el capital humano y procesos de innovación.
Impacto de los procesos de investigación en los procesos de formación humana integral para la Facultad de Ciencias y Tecnologías de la VUAD
Authors: Roberto Julia Isabel , Lima Ravelo Wilma E. , Sánchez Hernández Paola A.
Published: November 2021

"La Facultad de Ciencias y Tecnologías (FCT) inició en el año 2014 un proceso de restruc- turación del área de investigación, revisando e interrelacionando los espacios académicos que comprendían los módulos de investiga- ción para unificar su denominación en todos los programas de pregrado de la Facultad; así mismo, unificar los contenidos, el número de créditos y su orientación; esto debido a que las cátedras con el componente investigativo eran transversales a todos los programas; por tanto se propuso la unión de los elementos mencio- nados dando lugar a una línea común y espa- cio académico que facilitara hablar un lengua- je general conceptual a nivel de Investigación Formativa en la Facultad, aprovechando que ya a esa fecha se desarrollaban actividades de investigación formativa.A partir de lo expuesto, surgió el interés de recopilar y analizar cómo se estaba realizando el proceso investigativo en los programas aca- démicos de la FCT; así como conocer el impac- to de las propuestas de investigación que se habían llevado a cabo; su contribución a la for- mación humana e integral de los estudiantes; su coherencia con los campos de estudio de los programas académicos en el período 2005 y 2014 y así conocer la evolución de la investiga- ción en la Facultad de Ciencias y Tecnologías durante este período."
Reflexiones de la extensión universitaria en las MSMEs desde los procesos de E-Learning
Authors: Escobar Alvarez Edward Fabián , Sánchez Morales Paula Andrea
Published: November 2021

En el presente documento se discute las relaciones entre los procesos de extensión universitaria y la sociedad, puntualmente en las micro, pequeñas y medianas empresas (en adelante: Mipymes). Se parte de un enfoque histórico y epistemológico del constructo de “extensión universitaria”. Posteriormente, se plantea una descripción de la situación actual de las Mipymes en Colombia y sus referentes a nivel mundial, a través de lo cual se devela la influencia y vinculación de la extensión universitaria con estos. Así mismo, se realiza una revisión de los constructos relacionados con procesos de aprendizaje virtual (E-Learning) para lograr una síntesis de la situación, desafíos y nuevas perspectivas de la extensión universitaria desde este enfoque y su impacto en las Mipymes.
Efficient and green approach for the esterification of lignin with oleic acid using surfactant-combined microreactors in water
Authors: An Liangliang , Si Chuanling , Wang Guanhua , Choi Cheol Soon , Yu Yong Ho , Bae Jin Ho , Lee Soo Min , Kim Yong Sik
Published: November 2021

A green, effective, and feasible reaction for esterification of lignin with oleic acid in water at room temperature was investigated. A surfactant-combined system (p-toluenesulfonic acid/4-dodecylbenzenesulfonic acid) was designed to simultaneously solubilize kraft lignin and disperse the oleic acid, producing microreactors for esterification. Esterification using a higher 4-dodecylbenzenesulfonic acid dosage at room temperature was found to be a good option, and an increasing oleic acid dosage had no effect on improving the degree of esterification. Structural characterization analyses confirmed the successful esterification of lignin with oleic acid, indicating the effectiveness and feasibility of esterification of macromolecules in water. Due to the introduction of a long flexible aliphatic chain, the lignin ester showed a noticeable decrease in glass transition temperature, an obvious increase in contact angle, and exhibited excellent thermoplasticity, processability, and hydrophobicity. Additionally, lignin-ester nanoparticles were prepared through the micellization of p-toluenesulfonic acid. Therefore, the method of esterification using surfactant-combined microreactors in water is promising for high value-added utilization of lignin.
Nanostructured SiC as a promising material for the cold electron emitters
Authors:   Taras Shevchenko National University of Kyiv, Goriachko A.M. , Strikha M.V. ,   Taras Shevchenko National University of Kyiv,   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine
Published: November 2021

In this paper, the novel cold electron emitters based on nanostructured SiC layers covering the Si(001) substrate have been proposed. Their main advantage is an extremely simple and cost-effective manufacturing process based on the standard microelectronics-grade silicon wafers with no ultra-high vacuum required and no complicated chemical deposition processes or toxic chemicals involved. It integrates within a single technological step both the SiC growth and nanostructuring the surface in the form of nanosized protrusions, which is extremely beneficial for cathode applications. A simple mathematical model predicts field emission current densities and turn-on electric fields, which would allow practical device applications. According to our estimations, emission currents in the milli-Amp range can be harvested from one square centimeter of the cathode surface with electric field close to 107 V/m. So, the nanostructured SiC can be the promising material for the cold electron emitters.
Phase transition in vanadium oxide films formed by multistep deposition
Authors:   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Kladko V.P. , Melnik V.P. ,   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Liubchenko О.I. ,   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Romanyuk B.M. ,   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Gudymenko О.Yo. ,   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Sabov Т.M. ,   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Dubikovskyi О.V. ,   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Maksimenko Z.V. ,   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Kosulya О.V. ,   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Kulbachynskyi O.A. ,   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Lytvyn P.M. ,   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine, Efremov О.O. ,   V. Lashkaryov Institute of Semiconductor Physics, National Academy of Sciences of Ukraine
Published: November 2021

VOx films deposited using the multistep method have been investigated. These films were deposited by repeating the two-stage method of low-temperature deposition – low-temperature annealing. The structure and characteristics of VOx thin films have been studied. Taking into account the obtained results, theoretical modeling of the structure was performed and the parameters of the metal-insulator transition have been calculated.
Exploring the characteristics of SnO2 nanoparticles doped organic blend for low cost nanoelectronics applications
Authors:   College of Agriculture, AL-Qasim Green University, Babylon, Iraq, Algidsawi A.J.K. , Hashim A. ,   College of Education of Pure Sciences, University of Babylon, Babylon, Iraq, Hadi A. ,   University of Babylon, College of Materials Engineering, Department of Ceramic and Building Materials, Iraq, Habeeb M.A. ,   College of Education of Pure Sciences, University of Babylon, Babylon, Iraq
Published: November 2021

The PVA/PVP/SnO2 nanostructure films were fabricated using the casting technique. The structure, dielectric and optical characteristics of PVA/PVP/SnO2 nanostructures were studied for pressure sensors. Results of studying the dielectric characteristics showed that the dielectric constant, dielectric losses and electrical conductivity of blend are enhanced with the rise of SnO2 nanoparticles (NPs) content. The dielectric constant and dielectric losses are reduced, while the conductivity is risen with the increase in frequency. The dielectric constant increases from 2.53 to 7.41, and dielectric losses rise from 0.5 to 2, while the conductivity increases from 2.82·10–11 S/cm up to 1.11·10–10 S/cm. The results of measuring the optical characteristics have indicated that the absorbance rises with increasing the SnO2 NPs content. The energy gap of blend has been reduced from 4.9 down to 4.65 eV with the rise in SnO2 NPs content. The optical constants have been improved with the rise in SnO2 NPs content. Results of studying the pressure sensors have shown that their capacitance grows with the pressure increase.
Healthcare: action research with trans people living on the streets
Authors: Souza Eduardo Sodré de , Tanaka Luiza Hiromi
Published: November 2021

ABSTRACT Objectives: to analyze the representations of healthcare provided to trans people living on the streets. Methods: ten women (three trans) and three cisgender men participated in this action research. Popular health education groups, focus groups, seminars and interviews were held, the data of which were organized in the software Nvivo®, submitted to content analysis and interpreted in the light of intersectionality theory. Results: healthcare was represented by the technical, relational, structural and citizenship dimensions. The relationship between gender and poverty determines the specific health needs of trans people living on the streets. Final Considerations: the need to expand conceptions and practices on healthcare to meet the specific health needs of trans people living on the streets was evidenced. Nursing, with competence and cultural sensitivity, can contribute to positive health outcomes and, consequently, break with the logic of exclusion, illness and poverty.
GGE-BIPLOT OF MULTIVARIATE INDEX TO SELECT MAIZE PROGENIES FOR EFFICIENT ASSOCIATION WITH Azospirillum brasiliense1
Authors: CECCON FELIPE , DAVIDE LIVIA MARIA CHAMMA , GONÇALVES MANOEL CARLOS , SANTOS ADRIANO DOS , LOURENTE ELAINE PINHEIRO REIS
Published: November 2021

ABSTRACT Maize is widely cultivated in Brazil, and nitrogen is a major nutrient for its yield. Azospirillum brasiliense bacteria help in plant nutrient supply; however, maize-Azospirillum symbiosis is not very efficient and requires selection of genotypes with a more efficient association. Multivariate indexes facilitate selection using a single value, and GGE-biplot analysis enables the visualization of the genotype-environment interaction from this value. The present study aimed to select progenies that effectively associate with the bacteria and study the efficiency of progeny selection using a multivariate index observed in the GGE-biplot method. The experiments were conducted in two cities in the state of Mato Grosso do Sul. In a simple 16 × 16 lattice, 256 genotypes were evaluated in the presence and absence of diazotrophic bacteria. PH, SL, SD, FI, HGM, SS, and GY were measured for the construction of a selection index. Genotypes exhibited significant genotype–environment interactions for all evaluated traits, allowing their use in the selection index. High-yield genotypes were not those with the highest selection index values. The traits GY, SD, HGM, SS, SL, and PH contributed the most to the construction of the index. The no-till system may have contributed to the weaker response of maize inoculated with Azospirillum brasiliense. Genotype 96 had the highest values of the characteristics used to calculate the GISI, along with the stability between environments.
DOSES AND SPLIT NITROGEN FERTILIZER APPLICATIONS ON THE PRODUCTIVITY AND QUALITY OF ARUGULA1
Authors: NASCIMENTO CAMILA SENO , NASCIMENTO CAROLINA SENO , CECÍLIO FILHO ARTHUR BERNARDES
Published: November 2021

ABSTRACT Splitting nitrogen (N) fertilizer application can be an efficient nutrient management technique to improve productivity and plant quality, as well as to reduce the negative environmental impact caused by N losses. In this context, the present study investigated how the management of N affects the agronomic characteristics of field-grown arugula plants. Nine treatments were assessed in a randomized complete block design, in a 4 x 2 + 1 factorial scheme, with three replicates. The evaluated factors were doses of N (60, 120, 180 and 240 kg N ha-1), split N fertilizer applications at side-dress (two and three times) and an additional treatment without a N supply. Maximum height was obtained with the application of 198 kg N ha-1. Nitrate content, fresh mass and productivity increased with increasing N doses. There was no effect of split N fertilizer applications on the characteristics evaluated. Therefore, the supply of 240 kg N ha-1 divided into two portions was considered as the best management strategy.
MANAGEMENT SYSTEMS ON PRODUCTION AND PHYSICOCHEMICAL TRAITS OF FRUITS OF CONVENTIONALLY AND ORGANICALLY GROWN FIG1
Authors: MOURA ELIAS ARIEL DE , MENDONÇA VANDER , FERREIRA ENOCH DE SOUZA , OLIVEIRA LUANA MENDES , MELO BRUNA ESTER FREITAS
Published: November 2021

ABSTRACT Fig (Ficus carica L.) is widely accepted due to its organoleptic and pharmacological properties. Search for innovations to improve the crop management has increased to reduce environmental impacts and improve the organoleptic quality and food safety of the fruits. Thus, this study aimed to evaluate the influence of fertilization methods and plant training systems on the production and physicochemical traits of fig. The experiment was carried out in a randomized complete block design in a 5 × 4 factorial scheme, with three blocks and three plants per plot. The factors corresponded to five fertilizers (chemical, cattle manure, sheep manure, poultry litter, and organic compost) and four training systems (two branches, three branches, four branches, and espalier). Results showed that, when using chemical fertilizer and poultry litter, plants showed similar productivity and number of fruits, which had similar firmness, length, and peel color (L and °h). The highest production and number of immature fruits were obtained using cattle manure. Soluble solids content and soluble solids content/ titratable acidity ratio were higher in fruits from plants fertilized with cattle manure, sheep manure, and organic compost. On the other hand, plants trained with three and four branches or in espalier produced fruits with the highest soluble solids content and weight. Also, heavier fruits were obtained using chemical fertilization and conducting plants with two, three, and four branches.
SURFACE RESIDUES: EFFECTS ON SOIL MOISTURE AND TEMPERATURE1
Authors: VIEIRA GUSTAVO HADDAD SOUZA , SILVA ARILDO SEBASTIÃO , JANI ARUN DILIPKUMAR , PREZOTTI LUSINERIO , MONACO PAOLA ALFONSA VIEIRA LO
Published: November 2021

ABSTRACT This study aimed to determine how crop residue placement and composition would affect soil water content and temperature during the dry season in the central region of Espírito Santo state, Brazil. A 19-week field study was conducted from April to August 2017. A 2 x 4 factorial study with four replications was implemented using a randomized complete block design. Factors were soil management [conventional tillage (CT) and no soil disturbance (ND)] and residue amendment [maize (Zea mays L.), sunn hemp (Crotalaria juncea L.), a maize-sunn hemp mixture, and a no amendment control]. Soil water content and temperature were measured weekly at predetermined soil depth intervals. Soil water content was higher in ND plots amended with surface residues than under all other treatments in the 0 to 0.05 m depth range. All residue amendments in this range were equally effective in conserving soil water. Surface residues reduced soil temperature by up to 8.4 °C relative to the control in ND plots. Incorporating residue amendments by CT cancelled all temperature-moderating benefits provided by surface residues. These results indicate that surface residues from cereals, legumes, or cereal/legume mixtures are equally effective in conserving soil water and moderating soil temperature during the dry season. Additional research is needed to determine how improved soil environmental conditions, generated by surface residues, would affect nutrient acquisition and crop performance.
BIOMASS AND CHEMICAL RESPONSES OF Desmanthus spp. ACCESSIONS SUBMITTED TO WATER DEPRIVATION1
Authors: QUEIROZ ILDJA VIVIANE DE , SANTOS MÉRCIA VIRGINIA FERREIRA DOS , MUIR JAMES PIERRE , DUBEUX JUNIOR JOSÉ CARLOS BATISTA , CUNHA MÁRCIO VIEIRA DA , MELLO ALEXANDRE CARNEIRO LEÃO DE
Published: November 2021

ABSTRACT Due to the predictions of climate change, there is a need to identify forage plants that can keep their productivity and nutritive value under hydric stress. The objective of this study was to evaluate the biomass and chemical responses of three Desmanthus spp. accessions under two water deprivation regimens (7 and 21-day). The experimental design used was randomized blocks in a 3 × 2 factorial arrangement (access and water deprivation) with four replications. There were reductions in the biomasses of leaf and stem fractions of 64% and 51%, respectively. The 43F accession showed greater leaf (1.86 g.plant-1) and stem (1.97 g.plant-1) biomasses under a total water restriction of 21 days, compared to the 89F and AusT accessions. In accessions 43F and 89F, there were carbohydrate accumulations in the leaves of 28% and 51%, respectively, under the 21-day water restriction, while AusT decreased 38% within a 7-day interval. Water deprivation affected the chemical characteristics of the accessions. Free proline was similar among accessions and accumulated 463% more in the leaves of plants submitted to 21-day water deprivation (90.22 mg.kg-1) compared to those subjected to water deprivation for 7 days (16.03 mg.kg-1). Proline and total soluble carbohydrate accumulation in 43F and 89F were insufficient to regulate crude protein, C content, and C:N ratios. These results demonstrate the variability in drought tolerance among accessions. Accessions 43F and 89F were more susceptible to 21-day water deprivation, while AusT showed greater drought tolerance.
QUALITY OF TABLE CASSAVA ROOTS FERTILIZED WITH PHOSPHORUS1
Authors: SILVEIRA FLÁVIO PEREIRA DA MOTA , LOPES WELDER DE ARAÚJO RANGEL , OLIVEIRA PEDRO RAMON HOLANDA DE , LIMA FERNANDA LARISSE DOS SANTOS , SILVEIRA LINDOMAR MARIA DA , BARROS JÚNIOR AURÉLIO PAES
Published: November 2021

ABSTRACT The quality parameters of cassava roots vary between cultivars and depend on abiotic factors, such as plant nutrition. However, the magnitude of how these factors interfere is not yet well defined, especially for phosphorus (P), which is a nutrient directly linked to the synthesis of sugars and starches in plants. Thus, the objective of the research was to evaluate the quality of roots of table cassava cultivars fertilized with doses of P in the Brazilian semiarid. The research was carried out at the Rafael Fernandes experimental farm, Mossoró, RN, Brazil, from June 2018 to April 2019. The experimental design used was in randomized blocks, arranged in subdivided plots and with four replications. Doses of P (0, 60, 120, 180 and 240 kg ha-1 of P2O5) were applied in the plots, and in the subplots, the table cassava cultivars (Água Morna, BRS Gema de Ovo, Recife and Venâncio). Firmness, elasticity, titratable acidity, soluble solids, total soluble sugars, starch and cooking were all evaluated. The quality of table cassava roots varied depending on the cultivar and the dose of P. Doses of P between 120 and 240 kg ha-1 of P2O5 increase the starch content and reduce the cooking time of table cassava roots.
Professor Sem Ensino: projeto de escola e professor para educação especial (1996-2016)
Authors: Vaz Kamille
Published: November 2021

RESUMO O objetivo deste artigo é contribuir com o debate do projeto de escola pública e de professor para a educação especial proposto nas políticas educacionais no início do século XXI no Brasil. Com base no materialismo histórico-dialético, analisamos documentos nacionais representativos da política de educação especial entre 1996 e 2016. Constatamos que o projeto de escola pública está ancorado no viés assistencialista, com ampliação da entrada do setor privado em sua gestão. A educação especial na atual perspectiva reforça a característica de serviço a ser prestado nas escolas regulares, e o professor, nesse contexto, é mais um recurso utilizado. Tais considerações corroboram com as determinações das Organizações Multilaterais para a educação.
Teoria e Educação nos Limites do Capital
Authors: Ciavatta Maria
Published: November 2021

RESUMO Neste artigo tratamos de teoria e educação e dos diversos contextos em que se situam os limites do capital, sua historicidade e relações com a vida humana. Outro aspecto de nossa reflexão é a educação no sentido de formação humana. Primeiro, tratamos da historicidade do materialismo histórico; a seguir, apresentamos alguns conceitos fundamentais para a pesquisa em educação; terceiro, trazemos a história do presente e sua relação com o autoritarismo em curso no Brasil; por último sinalizamos os limites sociais do sistema capital, suas contradições e o reconhecimento do espaço dialético dos fenômenos que instauram formas contra hegemônicas de pensamento e de ação.
Riscos ocupacionais e intervenções que promovem segurança para a equipe de enfermagem oncológica
Authors: Fernandes Márcia Astrês , Rocha Daniel de Macêdo , Ribeiro Hellany Karolliny Pinho , Sousa Carliane da Conceição Machado
Published: November 2021

Resumo Objetivo: analisar as evidências científicas relacionadas aos riscos ocupacionais e às intervenções que promovem segurança no trabalho para a equipe de enfermagem oncológica. Métodos: revisão de literatura realizada nas bases de dados MEDLINE, Web of Science, Scopus, LILACS, IBECS e BDENF. Resultados: a busca identificou 17 estudos primários, publicados em inglês, no período de 2008 a 2017. Dentre os fatores que configuram riscos ocupacionais, destacam-se: o déficit no conhecimento; a pouca disponibilidade de equipamentos de proteção individual para manuseio dos medicamentos antineoplásicos; o estresse; e a ansiedade. Quanto às intervenções que promovem a segurança, evidenciam-se: a manutenção do ambiente laboral favorável ao desempenho da assistência; a disponibilidade de insumos; o bom relacionamento interpessoal; a organização do trabalho; o dimensionamento profissional adequado; o conhecimento, a disponibilidade e o incentivo ao uso dos equipamentos de proteção; e a compreensão dos riscos ocupacionais aos quais os profissionais estão expostos. Conclusão: o estudo possibilitou a identificação de fatores associados à atividade laboral que comprometem a saúde da equipe de enfermagem oncológica, demonstrando a necessidade de intervenções voltadas para a melhoria das relações interprofissionais, a capacitação dos profissionais e o oferecimento de um ambiente de trabalho seguro e condições organizacionais que promovam a saúde dos trabalhadores.
Explorando otros paradigmas en endodoncia de dientes primarios. una revisión narrativa
Authors: Puga Cuevas Nataly Tamar , Reina González Wilson , Vera Bustos Lalfa Arlette
Published: November 2021

La Inflamación pulpar irreversible y necrosis pulpar en dientes deben tratarse por medio de la terapia endodóntica convencional, la que presenta limitaciones inevitables y conocidas en niños y niñas. Debido a esto ha resurgido la terapia “Esterilización de la lesión y reparación de tejidos”, la que podría sortear las complicaciones de las técnicas endodónticas convencionales. Por lo tanto, el propósito de este estudio es revisar la literatura actual con respecto a la aplicación de esta terapia.

La técnica Esterilización de la lesión y reparación de tejidos usa abundante irrigación y una pasta antibiótica (metronidazol, minociclina y ciprofloxacino) a la entrada de los conductos radiculares para la terapia de dientes primarios con pronóstico malo, en donde el tratamiento endodóntico convencional no está indicado. El objetivo de la técnica es promover la curación de los tejidos periapicales y aumentar la permanencia del diente en boca a un tiempo más cercano a la exfoliación natural.

La técnica Esterilización de la lesión y reparación de tejidos es una alternativa eficaz para el manejo endodóntico de dientes temporales con pronóstico malo.
Estimating Nephron Number from Biopsies: Impact on Clinical Studies
Authors: Morozov Darya , Parvin Neda , Conaway Mark , Oxley Gavin , Baldelomar Edwin J. , Cwiek Aleksandra , deRonde Kim , Beeman Scott C. , Charlton Jennifer R. , Bennett Kevin M.
Published: November 2021

Significance Statement

Total nephron number is a potentially important marker of susceptibility to kidney disease. This work demonstrates the effect of spatial variation in glomerular density on the estimation of whole-kidney nephron number from biopsy. We show here that a single needle biopsy does not accurately reflect whole-kidney nephron number on an individual level. However, in studies with a large number of subjects or samples, needle biopsies can reveal differences in nephron number between populations. There is a need for new technologies to directly measure nephron number at an individual level.

Background

Accumulating evidence supports an association between nephron number and susceptibility to kidney disease. However, it is not yet possible to directly measure nephron number in a clinical setting. Recent clinical studies have used glomerular density from a single biopsy and whole kidney cortical volume from imaging to estimate nephron number and single nephron glomerular filtration rate. However, the accuracy of these estimates from individual subjects is unknown. Furthermore, it is not clear how sample size or biopsy location may influence these estimates. These questions are critical to study design, and to the potential translation of these tools to estimate nephron number in individual subjects.

Methods

We measured the variability in estimated nephron number derived from needle or virtual biopsies and cortical volume in human kidneys declined for transplantation. We performed multiple needle biopsies in the same kidney, and examined the three-dimensional spatial distribution of nephron density by magnetic resonance imaging. We determined the accuracy of a single-kidney biopsy to predict the mean nephron number estimated from multiple biopsies from the same kidney.

Results

A single needle biopsy had a 15% chance and virtual biopsy had a 60% chance of being within 20% of the whole-kidney nephron number. Single needle biopsies could be used to detect differences in nephron number between large cohorts of several hundred subjects.

Conclusions

The number of subjects required to accurately detect differences in nephron number between populations can be predicted on the basis of natural intrakidney variability in glomerular density. A single biopsy is insufficient to accurately predict nephron number in individual subjects.
“Earth Girl Won’t Stand For It!”: Representations of Environmental (In)Justice in 'Mayah’s Lot' (2012)
Authors: Anderson Brianna
Published: November 2021

As the global climate crisis escalates, environmental disaster and extreme weather will play a defining role in the lives of many of today’s children, particularly those from impoverished communities and communities of color. However, environmental children’s literature has overwhelmingly failed to educate readers about environmental injustice or equip them with the tools to combat these pressing issues. Rebecca Bratspies and Charlie La Greca’s comic Mayah’s Lot (2012) counters this troubling silence by empowering children to pursue environmental justice. The comic centers on Mayah, a young Black girl who discovers that a corporation plans to transform a vacant lot in her urban neighborhood into a toxic waste storage facility. Mayah joins forces with her neighbors to halt the development, participating in protests, community meetings, and legal action. The comic concludes with the community defeating the corporation and collaborating to turn the lot into public green space. By highlighting the intersections between environmental and racial inequalities, along with showcasing a range of viable community activist strategies, I argue that Mayah’s Lot demonstrates how environmentally-justice oriented comics can empower young readers to participate in environmental advocacy and develop resilience in the face of environmental disruption.
Queen Victoria’s Leaves from the Journal of Our Life in the Highlands: Illustrated Print Culture and the Politics of Representation
Authors: O'Neill Morna
Published: November 2021

Queen Victoria published her first Highland memoir in 1867, a sentimental narrative of royal life dedicated to Prince Albert entitled Leaves from the Journal of Our Life in the Highlands. In response to the popularity of this edition, the publisher Smith, Elder and Co. released a lavishly illustrated edition in late 1868 to capitalize on the Christmas gift book market. It featured seventy-nine illustrations after works by various artists and photographers. When scholars have turned their attention to the Queen’s journal, they have produced rich and sophisticated discussions of gender, monarchy, and celebrity, especially as they relate to royal domesticity in the Scottish Highlands. Yet these readings have rarely extended to the illustrated version of the text. This article will consider the conjunction of monarchy, the Scottish Highlands, and illustrated print culture in the illustrated Leaves through two different types of images: steel-plate engravings after watercolours by the artist Carl Haag and wood engravings after watercolour sketches of Highland games by the Swedish artist Egron Lundgren. Each positions the male Highlander as a central figure in constructing the dynamic of royal family life, sovereignty, and empire. Catherine Hall and Sonya Rose have recently explored what it meant for the British to be ‘at home with the Empire’, asking ‘was it possible to be “at home” with an empire and with the effects of imperial power or was there something dangerous and damaging about such an entanglement?’. In the course of this article, I argue that these illustrations constructed the male Highlander as a site of familiarity within the bounds of the nation, while simultaneously signalling his otherness and proximity to the more far-flung reaches of empire. As a result, Leaves is as much about empire as it is about domesticity, even as it eschews direct references to current events of the period that directly threatened both. 
Modelo simplificado de una interfaz de conexión a la red basada en un convertidor electrónico de potencia para estudios de red en régimen dinámico
Authors: Ochoa Danny
Published: November 2021

El cambio de paradigma experimentado por los sistemas eléctricos a nivel mundial ha propiciado una participación masiva de nuevos agentes energéticos: generación, almacenamiento y consumo. En la mayoría de los casos, estos agentes están dotados de convertidores electrónicos de potencia (CEP) para verter su energía a la red. Esta realidad ha impulsado el desarrollo de modelos analíticos muy sofisticados y detallados de CEP para estudiar el impacto de su interacción con la red en un entorno de simulación. No obstante, cuando se trata de estudiar redes de gran dimensión o con sus componentes desagregados, la enorme carga computacional requerida para simular un modelo detallado podría suponer una limitante para la realización de tales estudios. En este artículo se propone el diseño de un modelo simplificado de una interfaz de conexión a la red basada en CEP, útil para estudios de red mediante MATLAB/Simulink®. El modelo está concebido para representar, con una precisión numérica razonable, el comportamiento dinámico que tendrían ciertas variables eléctricas de interés de un modelo detallado y, al mismo tiempo, para conseguir una reducción significativa del tiempo de cómputo. Un análisis comparativo de los resultados numéricos, las dinámicas generadas y el tiempo de convergencia de los dos modelos permite validar la propuesta. Estos hitos conseguidos permiten cumplimentar los objetivos planteados en esta investigación.