861 research outputs found

    Associating polymer-surfactant systems

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    Some recent illustrations of the phase behavior of polymer-amphiphile systems in solution are presented. Surfactant-polymer association is demonstrated for various amphiphilic synthetic and biological polymers both on a macroscopic and on a single molecular level

    Experiencia en cad

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    La necesidad de investigar las nuevas tecnologías en la enseñanza universitaria, ha hecho que se evalúen los conocimientos adquiridos alrededor del Diseño Asistido por Computador, para tomar aquello que pueda usarse para crear nuevos tutoriales multimediales. Con el soporte de otros paquetes gráficos, se tratará de obtener los mejores resultados, apoyados en las investigaciones propias y de otras personas sobre productos de enseñanza empleando computadores.The need to investigate the new technologies in the university education, has made that evaluate the knowledge acquired about the Design Assisted by Computer, to take what could be used to create new tutoriales multimedials. With the support of other graphic bundles, it will be a question of obtaining the best results rested on the proper investigations and of other persons on products of education using computers

    Human Papillomavirus in Brazilian women with and without cervical lesions

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    <p>Abstract</p> <p>Background</p> <p>Human Papillomavirus (HPV) high-risk (HR) types are the causal factor for cervical cancer and premalignant dysplasia. Data on frequency of HPV types provide a basis to design and evaluate HPV prevention programs. Taking into account the heterogeneity of HPV types across and within populations this study aims to access the HPV frequency in Brazilian women.</p> <p>Results</p> <p>We identified 24 different types of HPV, including a <it>Betapapillomavirus </it>and a likely new type, previously reported, from 132 women positive for the virus analysed by Hybrid Capture II assay. These women were infected by a single or multiple HPV types and 142 HPV strains were identified. HR types were found in 75% of women and HPV types 16, 18, 45, 58, and 66 had the highest frequency. Significant differences in frequency of HR HPV types were found for presence of cervical lesions, and for different HPV species and women age.</p> <p>Conclusions</p> <p>Compared with previous studies in Brazil, our data indicated differences in frequency and HPV type diversity, a significant association of other HR-types but HPV16 and 18 and cervical lesions, and a trend for distinct distribution of HPV types by age.</p

    Phenols, essential oils and carotenoids of Rosa canina from Tunisia and their antioxidant activities

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    The antioxidant activity of leaf extracts of Rosa canina from diverse localities of Tunisia were evaluated by ABTS and DPPH methods, whereas in those of essential oils and carotenoids extracts such activity was determined only by the ABTS method. Total phenols determined by the Folin method revealed that at Aindraham, samples showed a great variability of phenol content in contrast to those from Feija. After chemical analysis of the essential oils by gas chromatography (GC) and gas chromatography coupled to mass spectra (GC-MS), revealed that the oils of Feija were predominantly composed of palmitic acid, vitispirane, linoleic acid, lauric acid, myristic acid and phytol acetate, while in thosesamples from Aindraham predominated vitispirane, palmitic acid, linoleic acid and phytol acetate. Higher concentrations of b-carotene and lycopene were found in the samples from Aindraham after determination by high performance liquid chromatography (HPLC). All samples possess antioxidant activity, nevertheless much more significant in phenol extracts in contrast to the carotenoid extracts, which possess the lowest activity

    Gestión del conocimiento en la administración pública

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    In Perú, the public administration does not have a solid knowledge management system, which helps to provide an efficient public service. Therefore, this research has collected a series of studies that highlight the importance of the implementation of knowledge management in both the private and public sectors, with the aim of highlighting the benefits that knowledge can generate in order to achieve optimal performance of public institutions; an effect of incorporating it as a fundamental asset that produces a positive impact on public administration; promote the construction of an institutional culture that promotes the transfer of knowledge between servers, encouraging good performance that guarantees correct and innovative decision-making, in order to provide efficient services that contribute to the integral development of society.En el Perú, la administración pública no cuenta con un sistema sólido de gestión del conocimiento, que coadyuve a brindar un servicio público eficiente. Por ello, la presente investigación ha recogido una serie de estudios que remarcan la importancia de la implementación de la gestión del conocimiento tanto en el sector privado como en el sector público, con el objetivo de resaltar los beneficios que puede generar el conocimiento en miras de conseguir un óptimo desempeño de las instituciones públicas; a efecto de incorporarlo como un activo fundamental que genere un impacto positivo en la administración pública; asimismo, fomentar la construcción de una cultura institucional que promueva la transferencia de conocimientos entre los servidores, motivando el buen desempeño que garantice la toma de decisiones correctas e innovadoras, a fin de brindar servicios eficientes que contribuyan al desarrollo integral de la sociedad

    Normas que vulneran el desarrollo urbano de nuestras ciudades

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    This study carries out the documentary and historical analysis of several countries, compares theories and similar studies that show the consequences of urban expansion as a result of the population increase, specifically in Peru. Theoretically, the urban development process should be carried out respecting the guidelines established in the management instruments and public policies. Fact that does not occur and that is aggravated by the negative impacts on the environment and the soil, resulting in the poor quality of life of Peruvians and the lack of urban sustainability. This research analyzes the problem in relation to the number of norms and laws that are issued from the Peruvian State: legislative power, executive power, regional and local governments, among others. The organic law of each government agency grants functions that allow it to develop specific norms that, in most cases, violate the existing norms on national strategic planning that are not elaborated in a transversal and multisectoral manner, on the contrary, in many cases they are they contravene and in others they overlap. Currently, there are very few urban plans and the few that exist do not consider the technical aspects required for their effectiveness and the scarce citizen participation.Este estudio realiza el análisis documental e histórico, de varios países, compara teorías y estudios similares que muestran las consecuencias de la expansión urbana como resultado del incremento poblacional, específicamente en el Perú. Teóricamente, el proceso de desarrollo urbano debe realizarse respetando los lineamientos establecidos en los instrumentos de gestión y políticas públicas. Hecho que no ocurre y que se agrava con los impactos negativos al ambiente y al suelo, redundando en la mala calidad de vida de los peruanos y en la falta de sostenibilidad urbana. Esta investigación analiza la problemática frente a la cantidad de normas y leyes que se emiten desde el Estado peruano: poder legislativo, poder ejecutivo, gobiernos regionales y locales entre otros. La ley orgánica de cada organismo gubernamental otorga funciones que le permiten elaborar normas específicas que, en la mayoría de los casos vulneran las normas existentes sobre el planeamiento estratégico nacional que no son elaboradas de manera transversal y multisectorial, por el contrario, en muchos casos se contravienen y en otros se superponen. Actualmente, existen muy pocos planes urbanos y los pocos que existen, no consideran los aspectos técnicos requeridos para su efectividad y la escaza participación ciudadana

    Interés público y constitución giratoria

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    Public policies must start from compliance with the constitutional charter. In its Public policies must start from compliance with the constitutional charter. In its article 65, from 1993 it establishes the consumer protection guarantee. However, in flagrant contradiction and evident discrimination, the last paragraph of Article 62, grants guarantees and assurances, only for a certain type of contract, the law-contracts. Guarantees can be established and guarantees can be granted and cannot be legislatively modified. They are constitutionally protected. This, when colliding with articles 1, 2.1, 2.2, 2.14 and 59 of the same instrument, evidently produces a conflict in the constitutional structure. Is it possible to formulate public policies, based on an unconstitutional constitution ? In Perú, yes. We have been doing it with law contracts for 28 years. We are facing a revolving constitution.Las políticas públicas, deben de partir del cumplimiento a la carta constitucional. En su artículo 65°, desde 1993 establece la garantía de Protección al consumidor. Sin embargo, en flagrante contradicción y evidente discriminación, el último párrafo del Artículo 62°, otorga garantías y seguridades, solo para un determinado tipo de contrato, los contratos-ley. Se puede establecer garantías y otorgar seguridades y no pueden ser modificados legislativamente. Están protegidos constitucionalmente. Esto, al colisionar con los artículos 1°, 2.1°, 2.2°, 2.14° y 59° del mismo instrumento, evidentemente produce un conflicto en la estructura constitucional. ¿Es posible formular políticas públicas, en base a una constitución inconstitucional? En el Perú, sí. Lo venimos haciendo con los contratos ley, desde hace 28 años. Estamos ante una constitución giratoria

    Surfing for social integration : mental health and well-being promotion through surf therapy among institutionalized young people

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    Copyright: © 2017 Margarida Gaspar de Matos, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.The Surf-Salva Camp 2016 project aimed at promoting social inclusion, wellbeing, and mental health, as well as developing beach security values and social citizenship in children and youth in foster care institutions, through surfing (Surf-Therapy). Participants were 48 adolescents aged 10 to 16, selected from 4 foster institutions in the greater Lisbon district. Results suggest that intervention through surf therapy had a number of positive effects: exploration, effort and perseverance, problem-solving, time management, social competencies, interpersonal relationships and emotional regulation all developed among the participants throughout the project. Results support the claim that within a suitable theoretical framework, with a solid and well trained team and with adequate psychotherapeutic supervision and evaluation, Surf Therapy can be a very promising possibility in the care of at-risk young people, and policy makers should consider this suggestion in the development of policies related to vulnerable institutionalized young people.info:eu-repo/semantics/publishedVersio

    Inorganic waste valorization plan in a municipality of Lima-Peru

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    El artículo tiene como finalidad plantear una propuesta para guiar a una municipalidad de Lima Metropolitana a un mejor manejo de los desechos sólidos inorgánicos y reaprovecharlos para que se pueda generar conciencia ciudadana. Toneladas de residuos terminan diariamente en rellenos sanitarios, lo que hace que su capacidad se agote, los factores que hacen que esta problemática ambiental se torne cada día más difícil son la gestión ambiental ineficiente y la falta de conciencia ambiental de los habitantes, cuyo único interés es desaparecer los residuos sin tener en cuenta reciclarlos. Se consideran diversos enfoques de análisis de los artículos seleccionados que nos permiten reconocer elementos importantes de manejo de los desechos sólidos, el reciclaje y la administración municipal. Los artículos académicos indexados se obtuvieron mediante la revisión sistemática de los portales Scopus, Scielo y Ebsco. Los artículos elegidos de las diversas revistas han pasado por una etapa de exclusión para este análisis de investigación con un intervalo de tiempo del año 2017 al 2021, por lo tanto, como resultado final se revisaron 16 artículos en tablas de análisis en donde se extrae la información más relevante para investigar lo cual complementa el desarrollo de nuestras discusiones y conclusionesThe purpose of the article is to propose a proposal to guide a municipality of metropolitan Lima to a better management of inorganic solid waste and to reuse it so that citizen awareness can be generated. Tons of waste end up daily in sanitary landfills, which causes their capacity to run out, the factors that make this environmental problem become more difficult every day are inefficient environmental management and the lack of environmental awareness of the inhabitants, whose only interest is to disappear waste without taking into account recycling. Various analysis approaches of the selected articles are considered that allow us to recognize important elements of solid waste management, recycling and municipal management. The indexed academic articles were obtained through the systematic review of the Scopus, Scielo and Ebsco portals. The articles chosen from the various journals have gone through an exclusion stage for this research analysis with a time interval from 2017 to 2021, therefore, as a final result, 16 articles were reviewed in analysis tables where the more relevant information to investigate which complements the development of our discussions and conclusion

    La gestión de tesorería en el sector público: alcances y retos para lograr la eficiencia en Latinoamérica

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    The purpose of the research was to describe and analyze the context of public treasury management in Latin America, which focused on recognizing the scope, the reality in which it is developed and the challenges that must be met for optimal operation. Various approaches have been considered that have made it possible to accurately identify the key factors for its optimal development, the existing problems and the agents with whom they interact, considering elements such as internal control, capital movement records and the performance of officials. This information was obtained through the method of systematic review of indexed scientific and academic literature from reliable portals such as Redalyc, Scielo, Academic Google and Ebsco, likewise, information delimitation criteria were presented, where the journals had to be in the interval of time between the years 2015 and 2021, obtaining 15 articles, which were analyzed in order to develop the discussion and conclusions useful for the area of ​​study and improvement in performance.La investigación tuvo como finalidad describir y analizar el contexto de la gestión de tesorería pública en Latinoamérica, la cual se enfocó en reconocer los alcances, la realidad en la que se desarrolla y los retos que deben cumplirse para un funcionamiento óptimo. Se han considerado diversos enfoques que han permitido identificar con precisión los factores clave para su adecuado desenvolvimiento, las problemáticas existentes y los agentes con los que interactúan, considerándose elementos como el control interno, los registros de movimientos de capital y el desempeño de los funcionarios. Esta información fue obtenida a través del método de revisión sistemática de literatura científica y académica indexada proveniente de portales confiables como Redalyc, Scielo, Google académico y Ebsco, asimismo, se presentaron criterios de delimitación de información, donde las revistas tuvieron que &nbsp;encontrarse en el intervalo de tiempo comprendido entre los años 2015 y 2021, obteniéndose 15 artículos, que fueron analizados con la finalidad de desarrollar la discusión y las conclusiones de utilidad para el área de estudio y mejora en el desempeño
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