Estresse salino em variedades de mamão (Carica Papaya L.).

Nos Estados da Bahia e do Espírito Santo, principais regiões produtoras de mamão do Brasil, essa cultura está concentrada no ecossistema dos Tabuleiros Costeiros, onde são registradas, em alguns meses, precipitações inferiores à demanda. Assim, para que o mamoeiro alcance altas produtividades, o emprego de irrigações suplementares constitui-se em uma prática importante e imprescindível. Porém, um problema que se tem verificado nessas regiões é a qualidade da água dos poços, açudes e rios, que nem sempre é adequada ao crescimento normal das plantas, em razão, principalmente, da relativa alta concentração de sais. Em geral, a inibição do crescimento das plantas sob condições salinas é conseqüência de seus efeitos osmóticos, que pode induzir condições de estresse hídrico à planta e, ou, de efeitos dos íons Na+ e Cl-, que podem acarretar toxidez direta e desordens nutricionais (Munns, 2002). Apesar da importância desse problema, aspectos relacionados à sensibilidade do mamoeiro ao estresse salino não tem sido merecedores de estudos. Assim, o presente trabalho objetiva avaliar a resposta diferencial de variedades de mamoeiro à salinidade.pdf 207

Diagenetic Fate of Biogenic Soft and Hard Magnetite in Chemically Stratified Sedimentary Environments of Mamanguá Ría, Brazil

Magnetotactic bacteria (MTB) synthesize magnetite and greigite crystals under low oxygen conditions in the water column or uppermost sediment (greigite‐producing bacteria are found below the oxic‐anoxic transition). Dissolved iron and oxygen contents in local environments are known to be limiting factors for the production and preservation of biogenic magnetite. Understanding the processes that link MTB to their living environments is fundamental to reconstructing past chemical variations in the water column and sediment, and for using the magnetic properties of biogenic magnetite as environmental proxy indicators. Previous studies have suggested that the frequently identified biogenic soft (BS) and biogenic hard (BH) magnetite types are associated with equant and more elongated morphologies, respectively, and that their abundance varies in accordance with sedimentary oxygen content, where MTB that produce the BH component live in less oxygenated environments. We test this hypothesis in a high‐resolution integrated environmental magnetic and geochemical study of surface sediments from Mamanguá Ría, SE Brazil. Based on magnetic and pore water profiles, we demonstrate that both the BS and BH components occur within microaerobic environments and that as sediment oxygen content decreases with depth, the BS component disappears before the BH component. With continued burial into the sulfidic diagenetic zone, both components undergo progressive dissolution, but the BH component is more resistant to dissolution than the BS component. Our observations confirm previous inferences about the relative stability of these phases and provide a firmer basis for use of these two types of biogenic magnetite as paleoenvironmental proxies.D. R. and L. J. acknowledge funding from FAPESP grants 2012/212123 and 2011/22018‐3, respectively. F. A. acknowledges funding from FAPERJ, CNPq, and CAPES. A. P. R. acknowledges funding from the Australian Research Council (grants DP140104544 and DP160100805)

Evidence indicating participation of the serotonergic system in controlling feeding behavior in Coturnix japonica (Galliformes: Aves)

We investigated participation of the brain serotonergic system in food intake control by using oral and systemic administration of serotonin precursors in quails (Coturnix japonica). Dietary supplemental tryptophan (0.1-50.0 g/kg) provoked a dose-dependent inhibition of food intake during a 5-h observation period, which persisted up to 24 h for doses of 30.0 and 50.0 g/kg. Normally fed and fasted animals treated with hydroxytryptophan (12.5-50.0 mg/kg) by the intracoelomic route showed an acute inhibition of food intake. Hypophagia in fasted birds was only effective when the precursor was administered immediately before food presentation. A similar response was obtained by administering serotonin (0.125-2.5 mg/kg, sc), with animals showing a hypnogenic response within the first ten minutes after administration, suggesting that, in contrast to mammals, the amine crosses the blood-brain barrier in quails. Administration of hydroxytryptophan at all doses tested induced significant dipsogenic behavior despite the concomitant hypnogenic response. The results suggest the involvement of serotonergic pathways in food intake control in quails and also show, for the first time, hypnogenic action induced by serotonin and a hyperdipsic effect elicited by hydroxytryptophan

Oficinas terapêuticas como instrumento de reabilitação psicossocial: percepção de familiares Talleres terapéuticos como herramienta para la rehabilitación psicosocial: percepción de la familia Therapeutic workshops as means of psychosocial rehabilitation: perception of family

As oficinas terapêuticas permitem a possibilidade de projeção de conflitos internos/externos por meio de atividades artísticas, com a valorização do potencial criativo, imaginativo e expressivo do usuário. Objetivou-se identificar a percepção dos familiares sobre as oficinas terapêuticas desenvolvidas. Pesquisa descritiva, com delineamento qualitativo, desenvolvida nos Centros de Atenção Psicossocial (CAPS) de Natal-RN, entre agosto e setembro de 2007. Foram entrevistados 28 familiares que participavam regularmente dos serviços. Os familiares destacaram o impacto positivo dos CAPS em suas trajetórias de tratamento e de vida, na melhoria da harmonia familiar. Sobre as oficinas terapêuticas, identificaram falhas e contradições, denunciando e apontando caminhos de superação. Percebem os espaços de participação nos CAPS como formas importantes de acompanhamento do seu familiar usuário, além do crescimento mútuo. As oficinas terapêuticas representam um instrumento importante de ressocialização e inserção individual em grupos, na medida em que propõem o trabalho, o agir e o pensar coletivos, conferidos por uma lógica inerente ao paradigma psicossocial.<br>Los talleres terapéuticos permiten la posibilidad de la proyección de los conflictos internos / externos a través de actividades artísticas, con la valorización del potencial creativo, imaginativo y expresivo del usuario. El objetivo fue identificar la percepción de las familias acerca de los talleres terapéuticos realizados. Investigación descriptiva, con delineación cualitativa, desarrollada en los Centros de Atención Psicosocial (CAPS) en Natal-RN, Brasil, entre agosto y septiembre de 2007. Entrevistamos a 28 familiares que asistieron regularmente a los servicios. Los miembros de la familia destacaron el efecto positivo de CAPS en sus trayectos de terapéutica y de vida, en mejorar la armonía familiar. En los talleres terapéuticos, detectaron las deficiencias y las contradicciones, revelando y apuntando maneras para superarlos. Ellos perciben los espacios para la participación en CAPS como instrumentos esenciales para la observación de su usuario familiar, además de un crecimiento mutuo. Los talleres terapéuticos representan un importante instrumento de socialización e integración individual en grupos, al paso que se propone trabajar, pensar y actuar colectivamente, conferido por la lógica inherente al paradigma psicosocial.<br>The therapeutic workshops allow the possibility of projection of internal / external conflicts through artistic activities, highlighting the creative, imaginative and expressive potential of the user. We aimed to identify the families' perception of the therapeutic workshops undertaken. The research descriptive, with qualitative design, developed in the Psychosocial Care Centers (CAPS) from Natal/RN between August and September 2007. We interviewed 28 families who regularly attended services. Family members emphasized the positive impact of CAPS in the course of their treatment and life, in improving family harmony. On the therapeutic workshops, were identified failures and contradictions, exposing and pointing ways to overcome them. They realize the opportunities for participation in CAPS as important ways of monitoring their family user, in addition to mutual growth. The therapeutic workshops represent an important instrument of socialization and integration in individual groups, while it proposes working, acting and collective thinking, conferred by an inherent logic of the psychosocial paradigm