Multistage asthenospheric melt/rock reaction in the ultraslow eastern SWIR mantle

Very small amounts of melt are produced during mantle upwelling beneath the ultraslow spreading South West Indian Ridge. Sectors of this Oceanic Ridge are characterized by nearly amagmatic spreading with rare limited eruptions of basalts spotting a mantle-derived serpentinitic crust. A large peridotite dataset was recovered during the Smoothseafloor French expedition leaded by D. Sauter and M. Cannat in 2005 (Sauter et al., 2013). Mantle-derived rocks show a significant modal variability from the sample to the dredge scale with frequent occurrences of millimetric to centimetric spinel-bearing pyroxenitic veins. Mantle residua record a multistage reactional history between small amount of transient melts and variably depleted mantle parcels. Incomplete mineral replacements are widespread showing that both pyroxenes are repeatedly dissolved and recrystallized leaving poekilitic pyroxene and spinel textures. Reacting conditions are modelled assuming an incremental open-system melting model under variable critical porosity/F ratios (Seyler et al., 2011; Brunelli et al., 2014). Incoming melts result to be generated by low degrees of melting in the garnet field then reacting with the rock under near-batch conditions, i.e. at low rates of melt extraction with respect to the actual rock porosity. As a consequence Na (and LREE) countertrends with melting indicators as mineral Cr# and concentration of the moderately incompatible elements (HREE, HFSE). This results in rotation of the REE patterns around a pivot element instead of showing progressive depletion as expected after suboceanic mantle decompression. Brunelli D., Paganelli E. & Seyler, M. 2014. Percolation of enriched melts during incremental open-system melting in the spinel field: A REE approach to abyssal peridotites from the Southwest Indian Ridge. Geoch. et Cosmoch. Acta, 127, 190–203. doi:10.1016/j.gca.2013.11.040. Sauter D., Cannat M., Searle R. 2013. Continuous exhumation of mantle-derived rocks at the Southwest Indian Ridge for 11 million years. Nature Geosci., 6(4), 1–7. doi:10.1038/ngeo1771. Seyler M., Brunelli D., Toplis M. J. & Mével C. (2011). Multiscale chemical heterogeneities beneath the eastern Southwest Indian Ridge (52°E-68°E): Trace element compositions of along-axis dredged peridotites. Geochem. Geophys. Geosyst., 12, Q0AC15. doi:10.1029/2011gc003585

Lie-Algebraic Characterization of 2D (Super-)Integrable Models

It is pointed out that affine Lie algebras appear to be the natural mathematical structure underlying the notion of integrability for two-dimensional systems. Their role in the construction and classification of 2D integrable systems is discussed. The super- symmetric case will be particularly enphasized. The fundamental examples will be outlined.Comment: 6 pages, LaTex, Talk given at the conference in memory of D.V. Volkov, Kharkhov, January 1997. To appear in the proceeding

Morphological Aspects And Cox-2 Expression After Exposure To 780-nm Laser Therapy In Injured Skeletal Muscle: An In Vivo Study

Background: The effectiveness of low-level laser therapy in muscle regeneration is still not well known. Objective: To investigate the effects of laser irradiation during muscle healing. Method: For this purpose, 63 rats were distributed to 3 groups: non-irradiated control group (CG); group irradiated at 10 J/cm² (G10); and group irradiated at 50 J/cm² (G50). Each group was divided into 3 different subgroups (n=7), and on days 7, 14 and 21 post-injury the rats were sacrificed. Results: Seven days post-surgery, the CG showed destroyed zones and extensive myofibrillar degeneration. For both treated groups, the necrosis area was smaller compared to the CG. On day 14 post-injury, treated groups demonstrated better tissue organization, with newly formed muscle fibers compared to the CG. On the 21st day, the irradiated groups showed similar patterns of tissue repair, with improved muscle structure at the site of the injury, resembling uninjured muscle tissue organization. Regarding collagen deposition, the G10 showed an increase in collagen synthesis. In the last period evaluated, both treated groups showed statistically higher values in comparison with the CG. Furthermore, laser irradiation at 10 J/cm2 produced a down-regulation of cyclooxygenase 2 (Cox-2) immunoexpression on day 7 post-injury. Moreover, Cox-2 immunoexpression was decreased in both treated groups on day 14. Conclusions: Laser therapy at both fluencies stimulated muscle repair through the formation of new muscle fiber, increase in collagen synthesis, and down-regulation of Cox-2 expression.185395401Minamoto, V.B., Bunho, S.R., Salvini, T.F., Regenerated rat skeletal muscle after periodic contusions (2001) Braz J Med Biol Res, 34 (11), pp. 1447-1452. , http://dx.doi.org/10.1590/S0100-879X2001001100012, PMid:11668355Baptista, J., Martins, M.D., Pavesi, V.C., Bussadori, S.K., Fernandes, K.P., Pinto, D.S., Jr., Influence of laser photobiomodulation on collagen IV during skeletal muscle tissue remodeling after injury in rats (2011) Photomed Laser Surg, 29 (1), pp. 11-17. , http://dx.doi.org/10.1089/pho.2009.2737, PMid:20701543Renno, A.C., Toma, R.L., Feitosa, S.M., Fernandes, K., Bossini, P.S., De Oliveira, P., Comparative effects of low-intensity pulsed ultrasound and low-level laser therapy on injured skeletal muscle (2011) Photomed Laser Surg, 29 (1), pp. 5-10. , http://dx.doi.org/10.1089/pho.2009.2715, PMid:21166589Pinheiro, A.L., Soares, L.G., Aciole, G.T., Correia, N.A., Barbosa, A.F., Ramalho, L.M., Light microscopic description of the effects of laser phototherapy on bone defects grafted with mineral trioxide aggregate, bone morphogenetic proteins, and guided bone regeneration in a rodent model (2011) J Biomed Mater Res A, 98 (2), pp. 212-221. , http://dx.doi.org/10.1002/jbm.a.33107, PMid:21548072Amaral, A.C., Parizotto, N.A., Salvini, T.F., Dose-dependency of low-energy HeNe laser effect in regeneration of skeletal muscle in mice (2001) Lasers Med Sci, 16 (1), pp. 44-51. , PMid:11486338Cressoni, M.D., Dib Giusti, H.H., Casarotto, R.A., Anaruma, C.A., The effects of a 785-nm AlGaInP laser on the regeneration of rat anterior tibialis muscle after surgicallyinduced injury (2008) Photomed Laser Surg, 26 (5), pp. 461-466. , http://dx.doi.org/10.1089/pho.2007.2150, PMid:18800950Pires, D., Xavier, M., Araújo, T., Silva, J.A., Jr., Aimbire, F., Albertini, R., Low-level laser therapy (LLLT780 nm) acts differently on mRNA expression of antiand pro-inflammatory mediators in an experimental model of collagenaseinducel tendinitis in rat (2011) Lasers Med Sci, 26, pp. 85-94. , http://dx.doi.org/10.1007/s10103-010-0811-zAlves, A.N., Fernandes, K.P.S., Melo, C.A.V., Yamaguchi, R.Y., França, C.M., Teixeira, D.F., Modulating effect of Low-level laser therapy on fibrosis in the repair process of the tibialis anterior muscle in rats (2014) Lasers Med Sci, 29 (2), pp. 813-821. , http://dx.doi.org/10.1007/s10103-013-1428-9, PMid:23982721Almeida, P., Lopes-Martins, R.A.B., De Marchi, T., Tomazoni, S.S., Albertini, R., Correa, J.C.F., Red (660nm) and infrared (830nm) low-level laser therapy in skeletal muscle fatigue in humans: What is better? (2012) Lasers Med Sci, 27, pp. 453-458. , http://dx.doi.org/10.1007/s10103-011-0957-3Brunelli, R.M., Rodrigues, N.C., Ribeiro, D.A., Fernandes, K., Magri, A., Assis, L., The effects of 780-nm low-level laser therapy on muscle healing process after cryolesion (2014) Lasers Med Sci, 29 (1), pp. 91-96. , http://dx.doi.org/10.1007/s10103-013-1277-6, PMid:23407900Rodrigues, N.C., Brunelli, R., De Araújo, H.S., Parizotto, N.A., Renno, A.C., Low-level laser therapy (LLLT) (660nm) alters gene expression during muscle healing in rats (2013) J Photochem Photobiol B, 120, pp. 29-35. , http://dx.doi.org/10.1016/j.jphotobiol.2013.01.002, PMid:23416710Shefer, G., Partridge, T.A., Heslop, L., Gross, J.G., Oron, U., Halevy, O., Low-energy laser irradiation promotes the survival and cell cycle entry of skeletal muscle satellite cells (2002) J Cell Sci, 115, pp. 1461-1469. , PMid:11896194Bossini, P.S., Renno, A.C., Ribeiro, D.A., Fangel, R., Peitl, O., Zanotto, E.D., Biosilicate(R) and low-level laser therapy improve bone repair in osteoporotic rats (2011) J Tissue Eng Regen Med, 5 (3), pp. 229-237. , http://dx.doi.org/10.1002/term.309, PMid:20925130Silveira, P.C., Silva, L.A., Fraga, D.B., Freitas, T.P., Streck, E.L., Pinho, R., Evaluation of mitochondrial respiratory chain activity in muscle healing by low-level laser therapy (2009) J Photochem Photobiol B, 95 (2), pp. 89-92. , http://dx.doi.org/10.1016/j.jphotobiol.2009.01.004, PMid:19232497Tim, C.R., Pinto, K.N., Rossi, B.R., Fernandes, K., Matsumoto, M.A., Parizotto, N.A., Low-level laser therapy enhances the expression of osteogenic factors during bone repair in rats (2014) Lasers Med Sci, 29 (1), pp. 147-156. , http://dx.doi.org/10.1007/s10103-013-1302-9, PMid:23515631Rizzi, C.F., Mauriz, J.L., Freitas Correa, D.S., Moreira, A.J., Zettler, C.G., Filippin, L.I., Effects of low-level laser therapy (LLLT) on the nuclear factor (NF)-kappaB signaling pathway in traumatized muscle (2006) Lasers Surg Med, 38 (7), pp. 704-713. , http://dx.doi.org/10.1002/lsm.20371, PMid:16799998Carmeli, E., Moas, M., Reznick, A.Z., Coleman, R., Matrix metalloproteinases and skeletal muscle: A brief review (2004) Muscle Nerve, 29 (2), pp. 191-197. , http://dx.doi.org/10.1002/mus.10529, PMid:14755482Matsumoto, M.A., Ferino, R.V., Monteleone, G.F., Ribeiro, D.A., Low-level laser therapy modulates cyclo-oxygenase-2 expression during bone repair in rats (2009) Lasers Med Sci, 24 (2), pp. 195-201. , http://dx.doi.org/10.1007/s10103-008-0544-4, PMid:18309458Albertini, R., Aimbire, F., Villaverde, A.B., Silva, J.A., Jr., Costa, M.S., COX-2 mRNA expression decreases in the subplantar muscle of rat paw subjected to carrageenan-induced inflammation after low level laser therapy (2007) Inflamm Res, 56 (6), pp. 228-229. , http://dx.doi.org/10.1007/s00011-007-6211-6, PMid:17607546Byrnes, K.R., Wu, X., Waynant, R.W., Ilev, I.K., Anders, J.J., Low power laser irradiation alters gene expression of olfactory ensheathing cells in vitro (2005) Lasers Surg Med, 37 (2), pp. 161-171. , http://dx.doi.org/10.1002/lsm.20202, PMid:16037971Moore, P., Ridgway, T.D., Higbee, R.G., Howard, E.W., Lucroy, M.D., Effect of wavelength on low-intensity laser irradiation-stimulated cell proliferation in vitro (2005) Lasers Surg Med, 36 (1), pp. 8-12. , http://dx.doi.org/10.1002/lsm.20117, PMid:15662631Demidova-Rice, T.N., Salomatina, E.V., Yaroslavsky, A.N., Herman, I.M., Hamblin, M.R., Low-level light stimulates excisional wound healing in mice (2007) Lasers Surg Med, 39 (9), pp. 706-715. , http://dx.doi.org/10.1002/lsm.20549, PMid:17960752 PMCid:PMC293579

Dinâmica de fenilalanina amonia-liase e peroxidase em feijão-caupi tratado com Acibenzolar-S-Metil.

O aumento na atividade das enzimas fenilalanina amônia-liase (FAL) e peroxidase tem sido associado a respostas inespecíficas de defesa vegetal. Objetivou-se com este trabalho verificar aumento na atividade dessas enzimas em plantas de feijão-caupi [Vigna unguiculata (L.) Walp.], cv. Rouxinol, oriundas de sementes tratadas com acibenzolar-S-metil (ASM) e desafiadas por Macrophomina phaseolina, agente causal da podridão cinzenta do caule. O experimento foi organizado em delineamento inteiramente casualizado, em arranjo fatorial 4 x 9 (tratamentos versus tempo de coleta) e três repetições. Os tratamentos foram representados pelo indutor (ASM), indutor + patógeno (ASM+MP), água + patógeno (H2O+MP) e testemunha absoluta (H2O). Os tempos de coleta foram: 0, 12, 24, 36, 48, 60, 72, 84 e 96 horas, após a semeadura e inoculação. Cada repetição foi representada por três sementes/plântulas. A atividade da FAL foi aumentada pela aplicação de ASM, especialmente nas 60 horas após a inoculação, sendo o mesmo verificado para peroxidase às 72 horas

Predicting death from surgery for lung cancer: a comparison of two scoring systems in two European countries

Objectives: Current British guidelines advocate the use of risk prediction scores such as Thoracoscore to estimate mortality prior to radical surgery for non-small cell lung cancer (NSCLC). A recent publication used the National Lung Cancer Audit (NLCA) to produce a score to predict 90 day mortality (NLCA score). The aim of this study is to validate the NLCA score, and compare its performance with Thoracoscore. Materials and methods: We performed an internal validation using 2858 surgical patients from NLCA and an external validation using 3191 surgical patients from the Danish Lung Cancer Registry (DLCR). We calculated the proportion that died within 90 days of surgery. The discriminatory power of both scores was assessed by a receiver operating characteristic (ROC) and an area under the curve (AUC) calculation. Results: Ninety day mortality was 5% in both groups. AUC values for internal and external validation of NLCA score and validation of Thoracoscore were 0.68 (95% CI 0.63–0.72), 0.60 (95% CI 0.56–0.65) and 0.60 (95% CI 0.54–0.66) respectively. Post-hoc analysis was performed using NLCA records on 15554 surgical patients to derive summary tables for 30 and 90 day mortality, stratified by procedure type, age and performance status. Conclusions: Neither score performs well enough to be advocated for individual risk stratification prior to lung cancer surgery. It may be that additional physiological parameters are required; however this is a further project. In the interim we propose the use of our summary tables that provide the real-life range of mortality for lobectomy and pneumonectomy

On the Nonlocal Equations and Nonlocal Charges Associated with the Harry Dym Hierarchy

A large class of nonlocal equations and nonlocal charges for the Harry Dym hierarchy is exhibited. They are obtained from nonlocal Casimirs associated with its bi-Hamiltonian structure. The Lax representation for some of these equations is also given.Comment: to appear in Journal of Mathematical Physics, 17 pages, Late

Monodromy Matrix in the PP-Wave Limit

We construct the monodromy matrix for a class of gauged WZWN models in the plane wave limit and discuss various properties of such systems.Comment: 16 page

Detecção de Macrophomina phaseolina em sementes de feijão-caupi.

A podridão cinzenta do caule do feijão-caupi (Vigna unguiculata (L.) Walp.), causada por Macrophomina phaseolina (Tassi) Goid., é uma das mais importantes doenças fúngicas da cultura. O patógeno é eficientemente transmitido pelas sementes, o que representa um risco elevado de disseminação do mesmo para áreas indenes. A esta realidade, pode-se acrescer aquela que resulta do aumento da distribuição de isolados entre áreas produtoras, constituindo-se em uma maior ameaça ao cultivo, pelo aumento da variabilidade patogênica. Este trabalho objetivou avaliar a qualidade sanitária das sementes em 119 amostras, originárias das Regiões Norte e Nordeste do Brasil, com foco à detecção de M. phaseolina. Empregou-se o método do papel de filtro com restrição hídrica (NaCl a 0,8Mpa), sendo utilizadas 400 sementes/amostra. O fungo M. phaseolina foi detectado em 62% das amostras analisadas, sendo as maiores incidências verificadas naquelas originadas dos Estados da Paraíba, Piauí, Pará e Bahia, com valores médios de 25%, 12%, 19% e 10%, respectivamente. Observou-se, ainda, diferença na incidência do patógeno considerando a cor do tegumento. As sementes com tegumento branco apresentaram as maiores médias (24%), quando comparadas com as de tegumento marrom (1%) e creme (0,5%)