536 resultados para Escrituras híbridas


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A literatura contemporânea expressa o rompimento das fronteiras entre a cultura erudita e a cultura de massa ou comercial, criando formas híbridas que convivem no interior do texto. No romance Voyages de l’autre cote (1975), de Jean-Marie Gustave Le Clézio, as canções do pop rock embalam as viagens da fada Naja Naja e de seus amigos em busca do ‘outro lado’. Desta forma, a impregnação da música popular à escritura poética, parece ajudar a libertar a imaginação, preparando as personagens para o encontro do infinito sensível.

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Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

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Pós-graduação em Zootecnia - FCAV

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Descrito como o presente Privilégio de Invenção, refere-se a um processo sobre novos materiais nanocompósitos de polímeros híbridos, preparados com sucesso baseados em um novo procedimento para cura de resinas epóxi comerciais ou não comerciais (tais como resinas epóxi híbridas orgânica-inorgânica, e outras que contenham grupos epóxi), sendo que, para tanto, é usado um silsesquioxano, substituído com éster, sendo genericamente definido como éster-silsesquioxano e etilenodiamina, como agentes de cura, sendo que o processo para cura destes materiais possa ser realizado a frio e que a cura se encerre em um tempo menor ou igual a duas horas.

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Introduction: Innovation and its processes, especially in the field of technology, are a focus of Information Science as a science of Human, as they determine the establishment of new habits, relevant socio-cultural indicators to understanding the history of cultures. Objective: This article reflects on the problematic: whether and how Information and Communication Technologies have impacted the lives of digital natives, whether the average individual is prepared to conscientiously experience the technological environment, how the current system can prepare future generations of professionals, and how the adults who grew up in the twentieth century, in an analogue society can prepare young people for a twenty-first century digital reality, widely different from theirs. Methodology: This paper was based on Literature Review. Results: As the sophistication of technology advances, society has to continually review the way it appropriates information to adjust to these changes. Conclusions: As for relevance of the methodologies that lead to innovative disruptive actions in hybrid realities such as the Brazilian one, with niches of poverty and prosperity, it is believed that it is in poor countries or countries with significant social differences such as Brazil where the need for a change of socio technocultural paradigm and innovative action urge to take place.

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Sistemas de liberação controlada são formas farmacêuticas que visam aumentar a eficácia terapêutica, a segurança do tratamento e a adesão dos pacientes. Neste contexto, as matrizes poliméricas, que buscam controlar o perfil de liberação de um fármaco, surgem como opção. Assim surge a necessidade de desenvolver e analisar materiais multifuncionais, que apresentem características superiores a dos materiais poliméricos comuns, como os híbridos orgânico-inorgânicos. Esse projeto teve como objetivo analisar a capacidade de incorporação e liberação “in vitro” dos fármacos cloridrato de pramoxina e acetato de dexametasona em sistemas híbridos orgânico-inorgânicos. As amostras foram preparadas utilizando misturas em diferentes proporções de materiais híbridos ureasil-polioxietileno (POE-1900) que possui um caráter altamente hidrofílico e ureasil-polioxipropileno (POP-400) com caráter altamente hidrofóbico. A partir dessas misturas pode-se controlar o balanço hidrofílico/hidrofóbico das matrizes híbridas, permitindo avaliar o comportamento desses sistemas, frente a incorporação de fármacos tanto hidrofílicos, como hidrofóbicos. Os testes de incorporação revelaram a capacidade desses materiais de incorporar os fármacos cloridrato de pramoxina e acetato de dexametasona em concentrações relativamente altas (20% m/m e 3% m/m, respectivamente) se comparado a formulações hoje presentes no mercado. Utilizando as diferentes proporções dos precursores POE-1900 e POP-400 foi possível modular o perfil de liberação dos fármacos, sendo que as amostras com maiores proporções do POP-400 tiveram uma liberação mais retardada, devido hidrofobicidade do material. As amostras contendo a dexametasona (hidrofóbico) apresentaram uma liberação mais lenta, constante e gradual se comparado a pramoxina (hidrofílico).

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The sol-gel process and the wide variety of alkoxides commercially available have facilitated the processing of various Organic-Inorganic Hybrid Materials. In general, the hybrids are excellents matrix to incorporate organic or inorganic dopants that presents photochromic, thermochromic, and halochromic effects and in some cases photorefractive effects. The GPTS-TEOS hybrid matrix when deposited in the form of film is very resistant, adherent, has excellent transparency in visible region and allows to be doped with various azo-dye and metal salts of unusual oxidation states. One of the main characteristics of the azo-dyes when immersed in some hybrid matrix , is the capacity to isomerizes through group Azo (-N = N-) would can be commutated between the Cis (Z) and Trans (E) configurations by means of light or heat. Our goal was through the sol-gel process to prepare hybrid films of GPTS-TEOS doped with azo-dyes Methyl Red and Disperse Red 1, and characterize them optically. The characterizations are performed using techniques of UV / Vis spectroscopy, to identify changes in the absorption band of azo-dyes in the presence of optical pumping, (photochromic effects), in function of temperature (thermochromic effect). These properties are of wide scientific and technological interest because they will contribute to the confection Smart Windows (windows sensible to light), temperature sensors monitored optically and also in the recording of amplitude and phase diffraction gratings

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In the present work the thermal characteristics of gels and xerogels of Silica/organic hybrids derived from different concentrations of GPTS-TEOS were investigated by thermal analysis (TG, DTA, and DSC). The preparation of gels of the Silica/organic hybrid matrix was held through the sol-gel process, consisting by the hydrolysis of alkoxides GPTS and TEOS in proportion (1:1) and (1:2) that was promoted in acidic conditions under reflux and stirring at 80oC/2h, producing the matrix in the colloidal state (sol). Gels were prepared by addition of NH4OH to the sol, promoting gelation of sol in sealed plastics containers. Part of the gels samples was analyzed by TG, DTS and DSC techniques in order to characterize water loss and degradation of the polymeric “epoxy” groups present in the structure of the silica derived from the GPTS alkoxide. Another set of samples was dried at 80oC/48h to obtain xerogels (dried gels) and analyzed by the same techniques. We obtained the characteristics temperatures of the matrix by the techniques DTA, DSC and TG, under measurements of thermal analysis until 800oC and 600oC in case of DSC. By thermal analysis (TG, DTA, and DSC) the main endothermic events (loss of water, melting, pyrolysis) and exothermic events (burning of the polymer) of the GPTS-TEOS matrix were determined

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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

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Recognizing the importance of developing the information and media literacy in contemporary society, this article discusses the scenario of hybrid languages born on cyberspace, hypertext and the new types of readers who interact with information, now disseminated by digital media. As theoretical references authors such as Lucia Santaella, we develop arguments that present the headquarters of language and thought within a semiotic support. Matrices help to understand the phenomenon of hybrid language in hypertext. Therefore, we emphasize that the development of skills associated with the new reading environments propitiated by the virtual environment requires the understanding of language, which is one of the concepts used within the media and information literacy (MIL) proposal of Unesco, which combines the two concepts and skills of information and media literacy. It is hoped that this article motivate scholars and practitioners of education and information to take responsibility to educate for information environments that arise with new media and technologies, emphasizing the issue of reading and language.