LA EDUCACIÓN A DISTANCIA: POTENCIALIDADES Y RETOS EN LA FORMACIÓN CONTINUA DE LOS PROFESIONALES

With the development of the information and communications technologies, indispensable support for developing the distance education, it has been necessary to re-conceptualize the traditional concepts from the Pedagogical theory and the Didactic points of view that has been explained the teaching and learning process by means of the right use technological. The objective of this work has been to suggest some ideas that expose discovery the potentialities and limitations in the informatics technology and others resources that exist in the Internet to guarantee the continuous formation of the professionals graduated from higher education through the distance education. This paper purposes some suggestions about the effective management of the post graduate; d educations systems through this modality.Con el desarrollo de las tecnologías de la información y las comunicaciones, soporte indispensable para el desarrollo de la educación a distancia en la actualidad, se hace necesario reconceptualizar los tradicionales conceptos que desde la pedagogía y la didáctica han explicado el proceso de enseñanza aprendizaje mediado por las tecnologías. El objetivo de esta ponencia consiste en esbozar algunas ideas que revelan las potencialidades, y limitaciones que tienen las tecnologías informáticas y los recursos disponibles en la red para garantizar la formación continua de los profesionales universitarios mediante la educación a distancia y se proponen algunas recomendaciones para garantizar la efectividad de la gestión del posgrado mediante esta modalida

Evaluation of three rootstocks root system for acid lime ‘tahiti’ at Piauí state/ <br> Sistema radicular de três porta-enxertos para lima ácida ‘tahiti’ no estado do Piauí

The objective of this work was to evaluate the development of the root system of three rootstocks for ‘Tahiti’acid lime [Citrus latifolia (Yu.Tanaka) Tanaka]: Rangpur lime (C. limonia Osbeck); Swingle citrumelo [Poncirus trifoliata (L.) Raf. x C. paradisi Macf.]; Flying Dragon trifoliate (P. trifoliata (L.) Raf.var. (FD) – in the soil and environment conditions of the county of José de Freitas, Piauí, located on 04º 52' latitude S and 42º 42' longitude W and 110 m of altitude, in Aw climate. It was used the trench method. A wooden frame divided into 0.1 x 0.2 m parts was fixed in the soil profile and a digital photograph was taken from each part. These photographs were analyzed by software SIARCS 3.0 for sizing of the root system and the data gotten, submitted to the analysis of variance with Tukey test at the level of 5% of probability. The experimental design was entirely randomized, with three treatments (rootstocks) and four replications (trenches). The root systems of the rootstocks had 90% of concentration until the depth of 0,4 m, and it was observed that 60% of the roots were concentrated in the first 0,2 m. The root system of the Rangpur lime demonstrated to be superior, in lenght (cm.200 cm-²) to the Flying Dragon trifoliate and Swingle citrumelo root systems.<p><p>O objetivo deste trabalho foi avaliar o desenvolvimento radicular de três porta-enxertos para lima ácida ‘Tahiti’ [Citrus latifolia (Yu.Tanaka) Tanaka]: limão Cravo (C. limonia Osbeck); citrumelo Swingle [Poncirus trifoliata (L.) Raf. x C. paradisi Macf.]; trifoliata Flying Dragon (P. trifoliata (L.) Raf.var. (FD), no município de José de Freitas, Piauí, localizado a 04º 52’ latitude S e 42º 42’ longitude W, e altitude de 110m, onde predomina clima Aw. Foram abertas trincheiras com quatro repetições, para colocação de quadro-gabarito de madeira, com divisórias de 0,1 m na profundidade por 0,2 m na largura, perfazendo cinco camadas na profundidade e seis posições na largura, definindo quadrículas de 200 cm2 na parede das trincheiras, de onde foram obtidas fotografias digitais. Estas fotografias foram analisadas pelo software SIARCS 3.0 para dimensionamento do sistema radicular e os dados obtidos, submetidos à análise de variância e posteriormente ao teste de Tukey, ao nível de 5% de probabilidade. O delineamento experimental foi inteiramente casualizado. Os sistemas radiculares dos porta-enxertos tiveram concentração de 90% até a profundidade de 0,4 m, sendo que nos primeiros 0,2 m concentrou-se 60% do comprimento das raízes. O sistema radicular do limão Cravo demonstrou ser superior, em comprimento (cm.200 cm-2), aos dos porta enxertos trifoliata Flying Dragon e citrumelo Swingle

Capacity Assesment And Potential For Reuse Of Calcined Bofe Bentonitic Clay For Adsorption Of Nickel

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)This work aims to evaluate different eluents in cycles of nickel adsorption/desorption on calcined Bofe clay. The following eluents were used sequentially for nickel desorption: H2SO4 0.25 mol/L, NaCl 1.0 mol/L, CaCl2 0.10 mol/L, and EDTA 0.10 mol/L. Physical-chemical characterization analyses of Bofe clay samples were carried out under different conditions to evaluate the effect of the remaining metal on the adsorbent submitted to adsorption/desorption cycles. The adsorbent material was characterized by the following techniques: energy dispersive X-ray spectroscopy (EDX), thermogravimetry (TG), differential scanning calorimetry (DSC), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and N-2 physisorption (BET). Statistica 5.0 was used as a computational tool to adjust the rate quasi-chemical solution to the experimental data of the breakthrough curves. From the new function obtained, breakthrough curves for different bed heights could be also simulated. An increase of the clay surface area and a reduction of real density after the passage of the four eluents were observed. Among the tested eluents, NaCl (1 mol/L) presented the highest percentage of desorption (88.08 %). The nickel adsorption/desorption cycles study showed that Bofe clay retains the same nickel adsorption capacity throughout the four evaluated cycles.94814571465CNPqCAPESFoundation for Research Support of Sao Paulo State, FAPESPConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

La educación a distancia: Potencialidades y retos en la formación continua de los profesionales

With the development of the information and communications technologies, indispensable support for developing the distance education, it has been necessary to re-conceptualize the traditional concepts from the Pedagogical theory and the Didactic points of view that has been explained the teaching and learning process by means of the right use technological. The objective of this work has been to suggest some ideas that expose discovery the potentialities and limitations in the informatics technology and others resources that exist in the Internet to guarantee the continuous formation of the professionals graduated from higher education through the distance education. This paper purposes some suggestions about the effective management of the post graduate; d educations systems through this modality.Con el desarrollo de las tecnologías de la información y las comunicaciones, soporte indispensable para el desarrollo de la educación a distancia en la actualidad, se hace necesario reconceptualizar los tradicionales conceptos que desde la pedagogía y la didáctica han explicado el proceso de enseñanza aprendizaje mediado por las tecnologías. El objetivo de esta ponencia consiste en esbozar algunas ideas que revelan las potencialidades, y limitaciones que tienen las tecnologías informáticas y los recursos disponibles en la red para garantizar la formación continua de los profesionales universitarios mediante la educación a distancia y se proponen algunas recomendaciones para garantizar la efectividad de la gestión del posgrado mediante esta modalida

Capacity assessment and potential for reuse of calcined Bofe bentonitic clay for adsorption of nickel

This work aims to evaluate different eluents in cycles of nickel adsorption/desorption on calcined Bofe clay. The following eluents were used sequentially for nickel desorption: H2SO4 0.25 mol/L, NaCl 1.0 mol/L, CaCl2 0.10 mol/L, and EDTA 0.10 mol/L. Physical‐chemical characterization analyses of Bofe clay samples were carried out under different conditions to evaluate the effect of the remaining metal on the adsorbent submitted to adsorption/desorption cycles. The adsorbent material was characterized by the following techniques: energy dispersive X‐ray spectroscopy (EDX), thermogravimetry (TG), differential scanning calorimetry (DSC), X‐ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and N2 physisorption (BET). Statistica 5.0 was used as a computational tool to adjust the rate quasi‐chemical solution to the experimental data of the breakthrough curves. From the new function obtained, breakthrough curves for different bed heights could be also simulated. An increase of the clay surface area and a reduction of real density after the passage of the four eluents were observed. Among the tested eluents, NaCl (1 mol/L) presented the highest percentage of desorption (88.08  %). The nickel adsorption/desorption cycles study showed that Bofe clay retains the same nickel adsorption capacity throughout the four evaluated cycles94814571465CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPESFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPsem informaçã

Carbonaceous adsorbent as green silica by‑product applied to the treatment of contaminated efuent by pesticide commonly sprayed on rice cultivation

Grain cultivation and its impacts on the environment have been the focus of many studies, especially due to generated solid waste and the wide use of agrochemicals aiming for greater productivity. In this context, the present study proposes a new and consistent step in constructing self-sustainability in rice farming. The proposed stage includes reusing green silica waste as an adsorbent to treat efuents contaminated by pesticides directly applied to rice cultivation. After nano silica production through the rice husks burning, followed by basic leaching and acid precipitation, a carbonaceous material remains. This material, naturally impregnated by Na2SiO3, was washed and dried, characterized, and used to remove the pesticide 2,4-dichlorophenoxyacetic acid (2,4-D). The adsorption essays were performed at 2,4-D at low concentrations (between 1 and 10 mg L−1) at diferent temperatures. The washed and dried porous carbon (WDPC) surface is irregular and presents slit-shaped channels. The FT-IR analysis identifed the siloxane, carbonyl, carboxylate, and methylene functional groups available to interact with the pesticide molecules. The washing/drying process eliminated impurities, improving the surface area from 539.67 to 619.67 cm2 g−1 and pore volume from 0.29 to 0.44 cm3 g−1. Concerning the adsorption of 2,4-D on WDPC, the best pH was 6.0, where around 75% of the pesticide was removed from the water. The equilibrium isotherms presented an S-shaped form indicating a multilayer and cooperative adsorption, with maximum adsorption capacities of 7.504 and 7.736 mg g−1. The estimated ∆Gads, ΔHads, and ΔSads values suggested that pesticide adsorption was spontaneous, exothermic, and favorable. Finally, WDPC demonstrated a good potential to uptake 2,4-D from water, contributing to self-sustainability in rice farming

Neoplasia cística mucinosa do pâncreas durante a gestação: Relato de Caso Mucinous cystic neoplasm of the pancreas during pregnancy: Case Report

O objetivo deste estudo é relatar o caso de uma gestante de 20 anos portadora de neoplasia cística mucinosa do pâncreas. Evidências sugerem que essa neoplasia é dependente dos hormônios estrógeno-progesterona levando a um importante crescimento durante a gestação e ainda apresentar, mesmo baixo, um potencial para degeneração maligna. O motivo deste relato é a raridade da doença associada a gestação em uma paciente tão jovem. Foi realizada pancreatectomia corpo-caudal no segundo trimestre da gestação com boa evolução materna e fetal.<br>The aim of this study is to report the case of a 20 years old pregnant woman with a mucinous cystic neoplasm of the pancreas. Evidence suggests that this neoplasm is dependent on estrogen-pro-gesterone leading to a significant growth during pregnancy and beyond this a potential malignant degeneration, even low. The reason of this case-study is the rarity of the disease associated with pregnancy in a patient so young. A body-tail pancreatectomy was performed in the second trimester of pregnancy with good maternal and fetal outcomes