Integrability in Theories with Local U(1) Gauge Symmetry

Using a recently developed method, based on a generalization of the zero curvature representation of Zakharov and Shabat, we study the integrability structure in the Abelian Higgs model. It is shown that the model contains integrable sectors, where integrability is understood as the existence of infinitely many conserved currents. In particular, a gauge invariant description of the weak and strong integrable sectors is provided. The pertinent integrability conditions are given by a U(1) generalization of the standard strong and weak constraints for models with two dimensional target space. The Bogomolny sector is discussed, as well, and we find that each Bogomolny configuration supports infinitely many conserved currents. Finally, other models with U(1) gauge symmetry are investigated.Comment: corrected typos, version accepted in J. Phys.

"Caracterização da proteína P61: possível glicoproteina dos Cilevirus"

RESUMO ? A leprose dos citrus, causada pelo citrus leprosis virus C (CiLV-C; gênero Cilevirus, família Kitaviridae) é uma das principais doenças que afetam à citricultura. CiLV-C codifica uma glicoproteína tentativa denominada P61. A expressão heteróloga desta proteína mediante agroinfiltração em plantas de Nicotiana benthamiana resulta em lesões semelhantes à reação de hipersensibilidade (HR-like) que aparece nas plantas infectadas com o vírus. Desde o ponto de vista molecular, a expressão da P61 produz o acúmulo de moléculas reativas de oxigênio (ROS) e a ativação genes relacionados à via do ácido salicílico (AS). Para aprofundar no papel do AS na resposta à presença da P61, neste estudo avaliamos a sua expressão em plantas N. benthamiana transgênicas que expressam constitutivamente o gene bacteriano NahG que codifica a enzima salicilato hidroxilase. As plantas transgênicas e selvagens serão infiltradas com Agrobacterium tumefaciens linhagem GV3101 que portam as construções pCAMBIA-2300 ?8 P61 CiLV-C CRD e pCAMBIA-2300 ?8, essa última como controle negativo. Se avaliara a intensidade das lesões produzidas. Como parte do estudo, os genes p61 dos cilevirus CiLV-C estirpe SJP, passion fruit green spot virus, e solanum violifolium ringspot virus e o higrevirus hibiscus green spot virus serão amplificados, clonados em vetores apropriados, sequenciados, ligados em vetores binarios para sua futura avaliaçao funcional mediante agroinfiltração.N. 21816

Endotoxin-induced lung alveolar cell injury causes brain cell damage

Instituto de Salud Carlos III (ISCIII

Clerodendrum Chlorotic Spot Virus and Brevipalpus yothersi mite: a model for the study of the dichorhavirus- vector interaction.

Clerodendrum chlorotic spot virus (ClCSV), genus Dichorhavirus, family Rhabdoviridae, is a bi-segmented (-)single-stranded RNA virus commonly occurring in some ornamental plants in Brazil. [...]

Quantum integrability and exact solution of the supersymmetric U model with boundary terms

The quantum integrability is established for the one-dimensional supersymmetric $U$ model with boundary terms by means of the quantum inverse scattering method. The boundary supersymmetric $U$ chain is solved by using the coordinate space Bethe ansatz technique and Bethe ansatz equations are derived. This provides us with a basis for computing the finite size corrections to the low lying energies in the system.Comment: 4 pages, RevTex. Some cosmetic changes. The version to appear in Phys. Rev.

Antifungal ativity against Botryosphaeriaceae fungi of the hydro-methanolic extract of Silybum marianum capitula conjugated with stevioside

Silybum marianum (L.) Gaertn, viz. milk thistle, has been the focus of research efforts in the past few years, albeit almost exclusively restricted to the medicinal properties of its fruits (achenes). Given that other milk thistle plant organs and tissues have been scarcely investigated for the presence of bioactive compounds, in this study, we present a phytochemical analysis of the extracts of S. marianum capitula during the flowering phenological stage (stage 67). Gas chromatography–mass spectroscopy results evidenced the presence of high contents of coniferyl alcohol (47.4%), and secondarily of ferulic acid ester, opening a new valorization strategy of this plant based on the former high-added-value component. Moreover, the application of the hydro-methanolic extracts as an antifungal agent has been also explored. Specifically, their activity against three fungal species responsible for the so-called Botryosphaeria dieback of grapevine (Neofusicoccum parvum, Dothiorella viticola and Diplodia seriata) has been assayed both in vitro and in vivo. From the mycelial growth inhibition assays, the best results (EC90 values of 303, 366, and 355 μg·mL−1 for N. parvum, D. viticola, and D. seriata, respectively) were not obtained for the hydroalcoholic extract alone, but after its conjugation with stevioside, which resulted in a strong synergistic behavior. Greenhouse experiments confirmed the efficacy of the conjugated complexes, pointing to the potential of the combination of milk thistle extracts with stevioside as a promising plant protection product in organic Viticulture

Molecular variability of citrus leprosis virus c, the main etiological agent of Citrus Leprosis Disease.

Cytoplasmic type of citrus leprosis disease caused by the cilevirus citrus leprosis virus C [CiLV-C; family Kitaviridae; ss(+)RNA genome] is the most important viral disease affecting the Brazilian citriculture. [...]

Detailed studies of IPHAS sources -- III. The highly extinguished bipolar planetary nebula IPHASX J191104.8++060845

We present the first detailed study of the bipolar planetary nebula (PN) IPHASX J191104.8$+$060845 (PN G040.6$-$01.5) discovered as part of the Isaac Newton Telescope Photometric H$\alpha$ Survey of the Northern Galactic plane (IPHAS). We present Nordic Optical Telescope (NOT) narrow-band images to unveil its true morphology. This PN consists of a main cavity with two newly uncovered extended low-surface brightness lobes located towards the NW and SE directions. Using near-IR WISE images we unveiled the presence of a barrel like structure, which surrounds the main cavity, which would explain the dark lane towards the equatorial regions. We also use Gran Telescopio de Canarias (GTC) spectra to study the physical properties of this PN. We emphasise the potential of old PNe detected in IPHAS to study the final stages of the evolution of the circumstellar medium around solar-like stars.Comment: 9 pages, 8 Figures, 3 Tables; Accepted to MNRA

Hygienization and control of Diplodia seriata fungus in vine pruning waste composting and its seasonal variability in open and closed systems

After the ban on sodium arsenite, waste management alternatives to the prevalent burning method, such as the hygienization and biodegradation in solid phase by composting, are required for the pruned material from grapevines affected by various fungi. In this work the dynamics of a fungus associated with vine decay (Diplodia seriata) during the composting process of a mixture of laying hen manure and vine pruning waste (2:1 w/w) have been investigated in an open pile and a discontinuous closed biodigester. Through the optimization of the various physical–chemical parameters, hygienization of the infected waste materials was attained, yielding class-A organo-mineral fertilizers. Nevertheless, important differences in the efficiency of each system were observed: whereas in the open pile it took 10 days to control D. seriata and 35 additional composting days to achieve full inactivation, in the discontinuous biodigester the fungus was entirely inactivated within the first 3–7 days. Finally, the impact of seasonal variability was assessed and summer temperatures shown to have greater significance in the open pile