125,566 research outputs found
Controle fitossanitário e qualidade de frutos em ameixeira e pessegueiro sob sistema orgânico no Alto Vale do Itajaí, SC
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Agrárias. Programa de Pós-Graduação em Agroecossistemas.A produção agrícola em sistema orgânico de frutas está em expansão em Santa Catarina, com estímulo para sua adoção em fruticultura, como ameixeira e pessegueiro, no Alto Vale do Itajaí. Dentro deste sistema, os problemas fitossanitários por vezes passam a ser limitantes com destaque na fruticultura à mosca-das-frutas Anastrepha fraterculus (Wied.), 1831(Diptera:Tephritidae), considerada a principal praga. Neste contexto pretendeu-se verificar a viabilidade do manejo e controle da mosca-das-frutas na produção de ameixeira e pessegueiro, em sistema orgânico no Alto Vale do Itajaí com o objetivo de comparar a eficiência dos diferentes métodos orgânicos; verificar a influência dos tratamentos na incidência de grafolita (Grapholita molesta) e podridão parda (Monilinia fruticola), teor de açúcar, produção, tamanho de frutos e descarte; constatar a época da presença da mosca-das-frutas e de sua oviposição nos frutos. O experimento em ameixeira foi desenvolvido em 2002 na Estação Experimental da EPAGRI, em Ituporanga -SC. Utilizou-se 8 cvs. de ameixeira, com três plantas de cada cultivar. Os tratamentos foram: (01) testemunha, (02) óleo de nim a 0,5 %, (03) óleo de nim mais 04 saches de naftalina pendurados por planta. O experimento em pessegueiro foi realizado em pomar da cv. Flordaking (precoce), em 2002 e 2003, e Della Nona (tardia), em 2002, na Escola Agrotécnica Federal de Rio do Sul. Os tratamentos usados em 2002 foram: (01) testemunha , (02) urina de gado leiteiro a 5%, (03) óleo de nim a 0,3%, (04) extrato pirolenhoso a 0,2% e (05) extrato de fumo a 10%; no ano de 2003: (01) testemunha, (02) extrato de fumo a 10%, (03) óleo de nim a 0,5%, (04) preparado homeopático de fumo CH30, (05) preparado homeopático de mosca-das-frutas CH30. Para cada tratamento foram utilizadas 4 plantas, sendo distribuídas em blocos completos ao acaso na linha de plantio. O monitoramento foi feito através de armadilhas McPhail. Na colheita, foram retirados 10 frutos de cada planta por tratamento. Os frutos foram cortados, verificando-se os danos e presença de larvas. Os demais foram colhidos e classificados nas classes A-B (= a 58mm), C-D (48 = 58mm), E-F (38 = 48mm) e descarte (< 38mm e injuriados). Foram feitos ainda os cálculos de graus-dia para o ciclo da mosca. Verificou-se que os tratamentos no geral foram pouco eficazes. Em ameixeira, não ocorreu a incidência de grafolita. A cv. Irati, obteve um melhor desempenho. O óleo de nim reduziu o grau Brix. As perdas devidas à mosca-das-frutas foram de 94,7%, inviabilizando a produção orgânica. Em pessegueiro, ocorreu diferença significativa entre os tratamentos apenas na incidência de larvas de grafolita, que foi maior em Flordaking no primeiro ano, nos tratamentos com calda de fumo e testemunha. Em Flordaking ocorreu um menor descarte (16,3% em 2002 e 13,2% em 2003) que Della Nona (50,5%) e o dano por mosca-das-frutas nesta última foi de 92%. Constatou-se a ausência de mosca-das-frutas no período de frutificação em Flordaking e ausência de suas larvas nos frutos analisados. O ensacamento na frutificação previniu a incidência e dano por mosca e podridão parda. O modelo de graus-dia permitiu prever a época de maior incidência de mosca-das-frutas, com a duração dos ciclos 36,6 e 44 dias em 2002 e 2003 respectivamente. Os dados obtidos permitem uma indicação de produção sob o sistema orgânico de cvs. de pessegueiro precoce para o Alto Vale do Itajaí. Para cvs. tardias, apenas com ensacamento de frutos
Data on the positive synergic action of dimethylacetamide and trehalose on quality of cryopreserved chicken sperm
No full textAbstractThis data article contains supporting information regarding the research article entitled “Combined effect of permeant and non-permeant cryoprotectants on the quality of frozen/thawed chicken sperm”(Mosca et. al., 2016) [1]. The combined effect of the permeant cryoprotectants agent dimethylacetamide and the non-permeant cryoprotectants agent trehalose on the quality of frozen-thawed chicken semen was assessed. In particular, the quantitative dimethylacetamide/trehalose ratio was investigated freezing semen samples according to the following treatments: trehalose 0.1M+0% dimethylacetamide (DMA-0), trehalose 0.1M+3% dimethylacetamide (DMA-3), trehalose 0.1M+6% dimethylacetamide (DMA-6)
Multilayer (Al,Ga)N Structures for Solar-Blind Detection
No full textWe report on solar-blind metal-semiconductor-metal (MSM) detectors fabricated on stacks of (Al,Ga)N layers with different AI mole fraction. These structures were grown by molecular beam epitaxy on sapphire substrates to allow backside illumination and a low-temperature GaN buffer layer. They consist of a 9-3-0.4-μm active layer grown on a thick (Al,Ga)N window layer (≈ 1 μm) that is transparent at the wavelength of interest. Different Al contents were used in the window layer. We observed that, in general, samples with a high Al content were cracked, which is explained in terms of mechanical strain. MSM photodetectors fabricated on these samples showed large leakage currents that were correlated with the crack density. In order to reduce the strain and eliminate the cracks, we inserted an AIN layer between the buffer and window layer. A crack-free sample was obtained and the solar-blind photodetector fabricated on this structure showed record performance
The internet as a new channel for political participation?
No full textThis chapter focuses on the political use of the internet considering both individual and organisational use. Firstly, we look at how individuals which took part in the Athens European Social Forum (ESF) use the internet politically. Secondly, we shed light on how social movement families and organisations mobilized in the Italian Global Justice Movement (GJM) use the web, highlighting limits and opportunities of using the web politically.
Data were gathered using different research instruments: a survey of participants in the European Social Forum in Athens and a series of interviews with spokespersons of different social movement families of the Italian GJM.
While quantitative data allows for controlling relations among variables concerning the political use of the internet by individuals, qualitative data provides more detailed information on internet use in the everyday life of activists and organisations
The role of social cooperatives in the fight against criminal organization: the Italian experiences
No full textCriminal organisations such as mafia and camorra build network between affiliates, politicians and individuals to rule in the territories. They use social ties and network to construct a social consent which allows them to operate, uncontested, in the production of illegal wealth for their members. Mosca and Villani (2011) show that in order to break the vicious circle between the social and cultural impoverishment and the strengthening of an economy sustained by crime it is necessary to utilize the same determinants of the social consent used by criminal organisations. The social and economic development of the territories created by promoting initiatives that favour the accumulation of “pure” social capital such us those sustained by social economy can avoid criminal organizations to continue to gain the consent of a large part of the population living in the territories in which they operate. These strategies seem to be in action in some Italian regions promoted by social cooperatives that the law n. 109/1996 and the recent antimafia code (d.lgs n.159/2011) recognise such as productive nonprofit organisation able to reuse illegal assets for social purposes. In Campania thanks also to the recent regional law for the reuse of illegal assets L.R. n.7/2012 and a particular model of welfare promoted by the art. 46 of L.R. n.1, illegal assets confiscated to criminal organisation represent inputs of a local development process based on the reconversion of the social capital used by mafia into a “pure” social capital useful for legal economic activities.
The number of reutilised illegal assets can be a proxy of a process of independence from criminal organisation that can signal the force of the territory to faith it.
The paper using the available data intends to show that the seizure and the confiscation of the illegal acquired assets, and suitable policies aimed at promoting and supporting the development of social cooperatives and non-profit organizations such us social cooperatives, which assume an important role in the labor market, can have a direct impact on the individuals’ choices, reducing the incentive for illegal activity
Intolerance of uncertainty: A temporary experimental induction procedure
No full textBackground and Objectives
Intolerance of uncertainty (IU) is a trans-diagnostic construct involved in anxiety and related disorders. Research focused on cross-sectional reporting, manipulating attitudes toward objective and impersonal events or on treatments designed to reduce IU in clinical populations. The current paper presents an experimental procedure for laboratory manipulations of IU and tests mediation hypotheses following the Intolerance of Uncertainty Model.
Methods
On pre-test, undergraduate volunteers (Study 1, n = 43;68% women. Study 2, n = 169;83.8% women) were asked to provide an idiosyncratic future negative life event. State-IU, Worry, Positive and Negative Affect were assessed after that a standardized procedure was used to identify event’s potential negative consequences. The same variables were assessed on post-test, after that participants were asked to read-through increasing and decreasing IU statements.
Results
Temporary changes on IU were consistently reproduced in both studies. Participants receiving increasing IU instructions reported greater state-IU, Worry and Negative Affect than those receiving decreasing IU instructions. However, this latter condition was not different from a control one (Study 2). Both studies revealed significant indirect effects of IU induction instructions on Worry and Negative Affect through state-IU.
Limitations
Both studies used undergraduate psychology students samples, younger than average population and predominantly female. Experimental manipulation and outcome measures belongs to the same semantic domain, uncertainty, potentially limiting generalizability.
Conclusions
Results supported the feasibility and efficacy of the proposed IU manipulation for non-clinical sample. Findings parallel clinical research showing that state-IU preceded Worry and Negative Affect states
Control biológico de mosca minadora en haba
No full textDescribe la alternativa de control biológico de la mosca minadora en el cultivo de haba utilizando dos avispitas benéficas: Phaedrotoma kuscheli y Halticoptera arduine
Roma, Constantinopoli, Mosca
No full textNautin Pierre. Roma, Constantinopoli, Mosca. In: Revue de l'histoire des religions, tome 204, n°3, 1987. pp. 309-310
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