Twisted Jacobi manifolds, twisted Dirac-Jacobi structures and quasi-Jacobi bialgebroids

We study twisted Jacobi manifolds, a concept that we had introduced in a previous Note. Twisted Jacobi manifolds can be characterized using twisted Dirac-Jacobi, which are sub-bundles of Courant-Jacobi algebroids. We show that each twisted Jacobi manifold has an associated Lie algebroid with a 1-cocycle. We introduce the notion of quasi-Jacobi bialgebroid and we prove that each twisted Jacobi manifold has a quasi-Jacobi bialgebroid canonically associated. Moreover, the double of a quasi-Jacobi bialgebroid is a Courant-Jacobi algebroid. Several examples of twisted Jacobi manifolds and twisted Dirac-Jacobi structures are presented

On quasi-Jacobi and Jacobi-quasi bialgebroids

We study quasi-Jacobi and Jacobi-quasi bialgebroids and their relationships with twisted Jacobi and quasi Jacobi manifolds. We show that we can construct quasi-Lie bialgebroids from quasi-Jacobi bialgebroids, and conversely, and also that the structures induced on their base manifolds are related via a quasi Poissonization

Jacobi-Nijenhuis algebroids and their modular classes

Jacobi-Nijenhuis algebroids are defined as a natural generalization of Poisson-Nijenhuis algebroids, in the case where there exists a Nijenhuis operator on a Jacobi algebroid which is compatible with it. We study modular classes of Jacobi and Jacobi-Nijenhuis algebroids

Internal deformation of Lie algebroids and symplectic realizations

Given a Lie algebroid and a bundle over its base which is endowed with a localizable Poisson structure and a flat connection, we construct an extended bundle whose dual is endowed with an almost-Poisson structure that is a quadratic Poisson structure when a certain compatibility property is satisfied. This new formalism on Lie algebroids describes systems with internal degrees of freedomCalouste Gulbenkian Foundation, PRODEP/5.3/2003, POCI/MAT/ 58452/2004; CMUC/FCT and the project BFM-2003-02532

Comparison of the Performance of Cu-CeO\u3csub\u3e2\u3c/sub\u3e-YSZ and Ni-YSZ Composite SOFC Anodes with H\u3csub\u3e2\u3c/sub\u3e, CO, and Syngas

In this study the performance of a solid oxide fuel cell (SOFC) with Cu-CeO2-yttria-stabilized zirconia (YSZ) was compared to an SOFC with Ni-YSZ anode while operating on H2, CO, and syngas fuels. Cells with Cu-CeO2-YSZ anodes exhibited similar performance when operating on H2 or CO fuels, while cells with Ni-YSZ anodes exhibited substantially lower performance when operating on CO compared to H2. Enhancing the catalytic activity of the Cu-CeO2-YSZ anodes by adding Co was shown to produce cells that exhibited higher performance when operating on CO compared to H2 at 973 K. The effect of fuel concentration and dilution on cell performance was also investigated and it was found that the kinetics of the oxidation of H2 are positive order in PH2 for Cu-CeO2-YSZ anodes and nearly zero order in PH2 for Ni-YSZ anodes. The oxidation of CO on Cu-CeO2-YSZ anodes was also found to exhibit positive order in PCO. It was also demonstrated that dilution of H2 by H2O had little effect on the kinetics of H2 oxidation on both the Cu-CeO2-YSZ and Ni-YSZ anodes

Cerebral venous thrombosis: an unexpected complication from spinal surgery

PURPOSE: To provide new insights into the pathophysiology, prevention and diagnosis of cerebral venous thrombosis (CVT) associated with iatrogenic cerebrospinal fluid (CSF) leaks and/or external CSF drainage. METHODS: Case report and literature review. RESULTS: We describe the case of a 30-year-old woman who developed a CSF fistula after lumbar spinal surgery. The treatment included rest, hydration, caffeine, and continuous lumbar CSF drainage. After closure of the fistula, the patient complained of severe orthostatic headache. Thrombosis involving the superior sagittal sinus, the right transverse sinus, the right sigmoid sinus, and the right jugular vein was diagnosed after neurological deterioration. CONCLUSION: A few reports have associated CVT with various forms of spinal meningeal injury. However, it has been rarely documented following spinal surgery complicated by accidental durotomy and/or external lumbar CSF drainage. CSF hypovolemia may precipitate CVT in patients having prothrombotic risk factors. Patients who have or had CSF leaks and/or lumbar CSF drains who present with symptoms of intracranial CSF hypotension should remain in the horizontal position to prevent CVT. In that context, the diagnosis of CVT depends on a high degree of suspicion

Avaliação da eficácia de fungicidas no controle de mofo branco (SCLEROTINIA SCLEROTIORUM) em soja, no Estado de Goiás.

O mofo branco, causado por Sclerotinia sclerotiorum aumentou consideravelmente sua incidência na cultura da soja, afetando cerca de 1 milhão de hectares em Goiás e causando perdas de até 40%. Para avaliar a eficácia de fungicidas no controle da doença, foi conduzido um experimento na safra 2010-2011, nos municípios de São Miguel do Passa Quatro e Silvânia, Goiás. Em delineamento experimental de blocos casualizados, foram avaliados os fungicidas tiofanato metílico (500 g ha-1)- 2 e 4 aplicações, carbendazim (500 g ha-1)-2 e 4 aplicações, procimidona (500 g ha-1)- 2 aplicações, fluazinam (500 g ha-1)- 2 aplicações, fluopyram (200 g ha-1)- 2 aplicações, dimoxystrobina+boscalid (400 g ha-1)- 2 aplicações, picoxistrobina+LEM 17+Nimbus (150 +150 g ha-1+ 450 ml/ha)- 2 aplicações, Oxicarboxim (900 g ha-1)- 2 aplicações. As aplicações foram realizadas com pulverizador costal pressurizado com CO2, barra com seis bicos AVI 110-02, vazão de 200 L ha-1. A primeira aplicação foi realizada em estádio R1, a segunda aos 10 dias após a primeira, a terceira 10 dias após a segunda e a quarta aos 10 dias após a terceira. Houve redução da incidência da doença para os tratamentos carbendazim-4 aplicações, procimidona, fluzinam, fluopyram, dimoxystrobina+boscalid e picoxystrobina+LEM+Nimbus em São Miguel do Passa Quatro e em Silvânia todos os tratamentos foram eficientes na redução da doença, com exceção do carbendazim nortox-2 aplicações e do plantvax. Quanto à produtividade todos os tratamentos foram superiores à testemunha sem controle, com exceção do plantvax em São Miguel do Passa Quatro. Com relação à massa de escleródios produzida, em São Miguel do Passa Quatro, todos os tratamentos foram superiores à testemunha, com exceção do Plantvax e em Silvânia, com exceção do tiofanato metílico-02 aplicações, carbendazim-02 aplicações e plantvax, todos os tratamentos foram superiores à testemunha sem controle

Avaliação da eficácia de fungicidas no controle da ferrugem asiática da soja (phakopsora pachyrhizi), no Estado de Goiás.

Com o objetivo de avaliar a eficiência dos fungicidas no controle da ferrugem asiática da soja, foi conduzido, na safra 2010/2011, um experimento na Estação Experimental da Emater-GO, no município de Senador Canedo-GO, utilizando-se a cultivar BRS Valiosa RR, em delineamento experimental de blocos casualizados. Tratamentos: 1- testemunha, 2-tebuconazole(0,5Lpc.ha-1), 3-ciproconazole (0,3Lpc.ha-1), 4-azoxistrobina +ciproconazole+Nimbus® (0,3Lpc.ha-1+0,5%), 5-piraclostrobina+epoxiconazole+Assist® (0,5+0,5Lpc.ha-1), 6-trifloxistrobina+tebuconazola+Aureo (0,5+0,5Lpc.ha-1), 7-picoxistrobina+ciproconazole+Nimbus® (0,3+0,45Lpc.ha-1), 8-trifloxistrobina+ ciproconazole+Aureo(0,15+0,5Lpc.ha-1), 9-azoxistrobin+tetraconazol+Nimbus® (0,5+0,5Lpc.ha-1), 10-trifloxistrobina+prothioconazole+Aureo (0,4+0,4 Lpc.ha-1), 11- piraclostrobina+metconazole+Assist (0,5+0,5 Lpc.ha-1), 12-piraclostrobina+ epoxiconazol+Lanzar (0,6 Lpc.ha-1+0,3%), 13-azoxistrobin Nortox+Assist (0,35Lpc.ha-1+0,5%), 14- azoxistrobina Nortox+ tebuconazole (0,5 Lpc.ha-1+ 0,5%), 15- oxicarboxim +Silwett (1,2Lpc.ha-1+0,05%), 16-azoxistrobina+tebuconazole+Nimbus® (0,5Lpc.ha-1+0,5%), 17-picoxistrobina+tebuconazole (0,5Lpc.ha-1+0,5%), 18- azoxistrobina +epoxiconazole (0,6Lpc.ha-1+0,5%). Foram realizadas duas aplicações de fungicidas, a primeira realizada no estádio R1(preventiva) da cultura da soja, a segunda aplicação aos 21 dias após a primeira. Os parâmetros avaliados foram a severidade da doença, sendo calculada a área abaixo da curva de progresso da doença (AACPD), peso de 100 grãos, desfolha e rendimento de grãos. Os menores valores de AACPD foram observados nos tratamentos 4, 5, 7, 10, 17 e 18. Com exceção dos tratamentos 1, 14, 2 e 3, todos os demais tratamentos obtiveram produtividades estatisticamente semelhantes entre si e superiores aos tratamentos 1, 14, 2 e 3. Os maiores pesos de grãos foram nos tratamentos 5, 10, 13, 17 e 18. Os menores valores de desfolha ocorreram nos tratamentos 4, 7, 9, 10, 11e 17