Uso de coberturas mortas de solo e produtividade dos ervais.

Estudos efetuados com adubação mineral de erva-mate têm mostrado vantagens acentuadas naqueles tratamentos que receberam, como cobertura morta, resíduos da própria erva-mate (palitos). Trata-se, porém, de um material escasso, havendo maior disponibilidade de subprodutos florestais, como serragem (pó de serra). Com a finalidade de avaliar se este material teria os mesmos efeitos benéficos no aumento da produtividade da erva-mate, este trabalho foi conduzido na Fazenda Vila Nova, pertencente à Ervateira Bitumirim, Ivai-PR, em plantio comercial de erva-mate a pleno sol, em Latossolo Vermelho álico textura argilosa. Os seguintes materiais foram testados a partir da colheita de agosto de 2001: 1. sem cobertura; 2. palito de erva-mate; 3. palito de erva-mate com uréia; 4. serragem; 5. serragem com uréia; 6. palito de pinus. Foram coletadas amostras de solo no início do experimento, em novembro de 2001, fevereiro de 2002 e em agosto de 2002, na segunda colheita, para análises químicas físicas e biológicas. O uso de coberturas mortas beneficiou a produção de erva-mate, seja pelo aumento ou menor redução da produção, comparando-se as colheitas anuais efetuadas. Foi determinado o teor de carbono da biomassa microbiana, que foi maior com o uso do palito de erva-mate e da serragem com a adição de uréia, as únicas coberturas mortas a apresentar aumento da produção de erva-mate. Na profundidade de 5 a 10 cm, o teor de carbono da biomassa microbiana apresentou maiores correlações com a diferença de produção entre as colheitas anuais, principalmente em amostragem efetuada em novembro de 2001, três meses após a adição de coberturas mortas na superfície do solo.Seção: Manejo e Extensão. Feira do Agronegócio da Erva-mate, 1., 2003, Chapecó. Integrar para promover o agronegócio da erva-mate

Formulation strategies for enhancing growth of akkermansia muciniphila and its survival through lyophilisation and storage at air ambient

Gut bacterium Akkermansia muciniphila has been recognized as a new potential probiotic due to promising outcomes in the prevention and treatment of several human diseases. However, despite its multiple beneficial effects, its viability is compromised by the presence of oxygen. This has so far precluded its application namely in the development of nutraceutical/therapeutic formulations. In order to enhance growth of A. muciniphila and its survival through lyophilisation and storage at air ambient, formulation strategies are presented based on use of prebiotic compounds, antioxidants and cryoprotectants. According to our best knowledge, there is no information regarding lyophilisation procedures involving A. muciniphila as well as its subsequent storage at ambient air.info:eu-repo/semantics/publishedVersio

Does e-learning policy drive change in Higher Education?: A case study relating models of organisational change to e-learning implementation

Due to the heightened competition introduced by the potential global market and the need for structural changes within organisations delivering e-content, e-learning policy is beginning to take on a more significant role within the context of educational policy per se. For this reason, it is becoming increasingly important to establish what effect such policies have and how they are achieved. This paper addresses this question, illustrating five ways in which change is understood (Fordist, evolutionary, ecological, community of practice and discourse-oriented) and then using this range of perspectives to explore how e-learning policy drives change (both organisational and pedagogic) within a selected higher education institution. The implications of this case are then discussed, and both methodological and pragmatic conclusions are drawn, considering the relative insights offered by the models and ways in which change around e-learning might be supported or promoted

Mineralização de nitrogênio e de potássio de estercos em função da profundidade e do tempo de incorporação.

Este trabalho teve como objetivo determinar o teor e a quantidade mineralizada de nitrogênio e potássio em dois estercos (bovino e caprino), quando incorporados a diferentes profundidades, ao longo do tempo, sob irrigação por microaspersão

Outflows in the Narrow Line Region of Bright Seyfert Galaxies - I: GMOS-IFU Data

We present two-dimensional maps of emission-line fluxes and kinematics, as well as of the stellar kinematics of the central few kpc of five bright nearby Seyfert galaxies -- Mrk\,6, Mrk\,79, Mrk\,348, Mrk\,607 and Mrk\,1058 -- obtained from observations with the Gemini Multi-Object Spectrograph (GMOS) Integral Field Unit (IFU) on the Gemini North Telescope. The data cover the inner 3\farcs5$\times$5\farcs0 -- corresponding to physical scales in the range 0.6$\times$0.9 to 1.5$\times$2.2\,kpc$^2$ -- at a spatial resolution ranging from 110 to 280 pc with a spectral coverage of 4300 -- 7100\,\AA\ and velocity resolution of $\approx$ 90\,km\,s$^{-1}$. The gas excitation is Seyfert like everywhere but show excitation, but show excitation gradients that are correlated with the gas kinematics, reddening and/or the gas density. The gas kinematics show in all cases two components: a rotation one similar to that observed in the stellar velocity field, and an outflow component. In the case of Mrk607, the gas is counter-rotating relative to the stars. Enhanced gas velocity dispersion is observed in association to the outflows according to two patterns: at the locations of the highest outflow velocities along the ionization axis or perpendicularly to it in a strip centered at the nucleus that we attribute to an equatorial outflow. Bipolar outflows are observed in Mrk\,348 and Mrk\,79, while in Mrk\,1058 only the blueshifted part is clearly observed, while in the cases of Mrk\,6 and Mrk\,607 the geometry of the outflow needs further constraints from modeling to be presented in a forthcoming study, where the mass flow rate and powers will also be obtained.Comment: 20 pages, accepted by MNRA

Controle de Commelina benghalensis, C. erecta e Tripogandra diuretica na cultura do café.

O objetivo deste trabalho foi avaliar o efeito de diferentes herbicidas/misturas no controle de três espécies de trapoeraba (Commelina benghalensis, C. erecta e Tripogandra diuretica) e a tolerância de plantas jovens de café aos herbicidas

Aceitabilidade do patê de tilápia.

bitstream/item/74947/1/pub-153.pd

Stacking Gravitational Wave Signals from Soft Gamma Repeater Bursts

Soft gamma repeaters (SGRs) have unique properties that make them intriguing targets for gravitational wave (GW) searches. They are nearby, their burst emission mechanism may involve neutron star crust fractures and excitation of quasi-normal modes, and they burst repeatedly and sometimes spectacularly. A recent LIGO search for transient GW from these sources placed upper limits on a set of almost 200 individual SGR bursts. These limits were within the theoretically predicted range of some models. We present a new search strategy which builds upon the method used there by "stacking" potential GW signals from multiple SGR bursts. We assume that variation in the time difference between burst electromagnetic emission and burst GW emission is small relative to the GW signal duration, and we time-align GW excess power time-frequency tilings containing individual burst triggers to their corresponding electromagnetic emissions. Using Monte Carlo simulations, we confirm that gains in GW energy sensitivity of N^{1/2} are possible, where N is the number of stacked SGR bursts. Estimated sensitivities for a mock search for gravitational waves from the 2006 March 29 storm from SGR 1900+14 are also presented, for two GW emission models, "fluence-weighted" and "flat" (unweighted).Comment: 17 pages, 16 figures, submitted to PR