Maxwell-Chern-Simons vortices in a CPT-odd Lorentz-violating Higgs Electrodynamics

We have studied BPS vortices in a CPT-odd and Lorentz-violating Maxwell-Chern-Simons-Higgs (MCSH) electrodynamics attained from the dimensional reduction of the Carroll-Field-Jackiw-Higgs model. The Lorentz-violating parameter induces a pronounced behavior at origin (for the magnetic/electric fields and energy density) which is absent in the MCSH vortices. For some combination of the Lorentz-violating coefficients there always exist a sufficiently large winding number $n_{0}$ such that for all $$ the magnetic field flips its signal, yielding two well defined regions with opposite magnetic flux. However, the total magnetic flux remains quantized and proportional to the winding number.Comment: Revtex style, 8 page

Effect of biofertilizers and neem oil on the entomopathogenic fungi beauveria bassiana (Bals.) vuill. and metarhizium anisopliae (Metsch.) sorok.

The in vitro fungitoxic effect of three biofertilizers, E.M.-4, Multibion Ô and Supermagro used in organic agriculture and the neem oil (Azadirachta indica A. Juss) on the entomopathogenic fungi Metarhizium anisopliae and Beauveria bassiana was studied. These products were mixed in a medium where the two fungi were inoculated, and germination, vegetative growth and conidiogenesis were assessed. The biofertilizers Supermagro and E.M.- 4 showed to be less toxic for the two fungi whereas MultibionÔ caused major inhibition on M. anisopliae, with reductions in germination (-37.74%), colony diameter (-30.26%) and conidiogenesis (-42.62%). Neem oil promoted a larger negative effect on B. bassiana, inhibiting germination (-45.27%), colony diameter (-36.62%) and conidiogenesis (-84.93%)

X-ray method to study temperature-dependent stripe domains in MnAs/GaAs(001)

MnAs films grown on GaAs (001) exhibit a progressive transition between hexagonal (ferromagnetic) and orthorhombic (paramagnetic) phases at wide temperature range instead of abrupt transition during the first-order phase transition. The coexistence of two phases is favored by the anisotropic strain arising from the constraint on the MnAs films imposed by the substrate. This phase coexistence occurs in ordered arrangement alternating periodic terrace steps. We present here a method to study the surface morphology throughout this transition by means of specular and diffuse scattering of soft x-rays, tuning the photon energy at the Mn 2p resonance. The results show the long-range arrangement of the periodic stripe-like structure during the phase coexistence and its period remains constant, in agreement with previous results using other techniques.Comment: 4 pages, 4 figures, submitted to Applied Physics Letter

Magnetic reconfiguration of MnAs/GaAs(001) observed by Magnetic Force Microscopy and Resonant Soft X-ray Scattering

We investigated the thermal evolution of the magnetic properties of MnAs epitaxial films grown on GaAs(001) during the coexistence of hexagonal/orthorhombic phases using polarized resonant (magnetic) soft X-ray scattering and magnetic force microscopy. The results of the diffuse satellite X-ray peaks were compared to those obtained by magnetic force microscopy and suggest a reorientation of ferromagnetic terraces as temperature rises. By measuring hysteresis loops at these peaks we show that this reorientation is common to all ferromagnetic terraces. The reorientation is explained by a simple model based on the shape anisotropy energy. Demagnetizing factors were calculated for different configurations suggested by the magnetic images. We noted that the magnetic moments flip from an in-plane mono-domain orientation at lower temperatures to a three-domain out-of-plane configuration at higher temperatures. The transition was observed when the ferromagnetic stripe width L is equal to 2.9 times the film thickness d. This is in good agreement with the expected theoretical value of L = 2.6d.Comment: 16 pages in PD

Pensando o futuro dos povos indígenas: A identificação de terras indígenas enquanto processo dialógico

A discussão sobre o aspecto técnico da identificação e delimitação de Terras Indígenas tem necessariamente que ser precedida por uma reflexão relativa às bases sobre as quais essa se assenta. Já foi ressaltado que a categoria de Área de Ocupação Tradicional, chave constitucional para o processo, é uma categoria jurídica e não antropológica. É necessário assim compreender a especificidade do estabelecimento de tal categoria para se delimitar com propriedade o campo de atuação de antropólogos no processo de identificação de Terras Indígenas.&nbsp

Faccionalismo Xukuru-Kariri e a Atuação da FUNAI

O objetivo deste trabalho é apresentar uma interpretação do chamado faccionalismo presente entre os Xukuru-Kariri de Alagoas, a partir de uma análise de sua forma específica de organização social enquanto grupo diferenciado da sociedade nacional. A intenção é fornecer elementos para uma discussão sobre a atuação do Órgão Indigenista Federal não apenas frente aos Xukuru-Kariri mas também frente às múltiplas e recorrentes questões de natureza similar, que representam um considerável entrave à atuação da FUNAI em toda a região Leste-Nordeste.&nbsp

Prevalência da resposta imunológica e virológica discordante em pacientes com AIDS sob terapêutica antirretroviral em ambulatório de centro de cuidados especializados no Brasil

Some patients under antiretroviral therapy (ART) do not reach immune recovery when the viral load becomes undetectable. This is called discordant immunologic and virologic responses. Its prevalence varies between 8% and 24%. This study describes its prevalence and the characteristics of the affected subjects in the outpatient clinic of a Brazilian specialized-care center. Of 934 patients on ART, 536 had undetectable viral loads. Prevalence was 51/536 or 9% (95% confidence interval: 6.6% to 11.4%). Median age at the beginning of ART was 37 years (interquartile range - IQR: 31 to 45). Male gender and mixed race predominated (76.5% and 47.1% respectively). AIDS-defining illnesses were absent at the beginning of ART in 60.8%. Fifty-one percent were taking protease inhibitors, 43.2% Efavirenz and 5.8% both. Median time on ART was 36 months (IQR: 17-81 months). Irregular treatment was recorded for 21.6%. ART had been modified for 63% prior to the study, and 15.7% had used monotherapy or double therapy. Median CD4 count was 255 cells/mm³ (IQR: 200-284). Median viral load before ART was 4.7 log10 copies/mL (IQR: 4.5-5.2). Discordant responders were not different from AIDS patients in general, but there was a high frequency of multiple schedules of treatment.Alguns pacientes sob terapêutica antirretroviral (TARV) não obtêm recuperação imune quando a carga viral se torna indetectável. Isto é chamado resposta imunológica e virológica discordante. A prevalência varia entre 8% e 24%. Este estudo descreve sua prevalência e características dos afetados em ambulatório de um centro de cuidados especializados brasileiro. De 934 pacientes sob TARV, 536 tinham carga viral indetectável. A prevalência foi 51/536, ou 9% (Intervalo de Confiança de 95% de 6,6% a 11,4%). Idade mediana no início da TARV foi 37 anos (distância interquartílica - DQ: 31 a 45). Gênero masculino e cor parda predominaram (76,5% e 47,1%, respectivamente). Doenças definidoras de Aids estavam ausentes no início da TARV em 60,8%. Cinquenta e um por cento recebiam inibidores da Protease, 43,2% Efavirenz e 5,8% ambos. Tempo mediano de TARV foi 36 meses (DQ: 17-81). Tratamento irregular foi registrado em 21,6%. TARV havia sido anteriormente modificado em 63% e 15,7% haviam usado mono ou dupla terapêutica. A contagem mediana de CD4 foi 255 células/mm³ (DQ: 200-284). O logaritmo mediano da carga viral antes do TARV foi 4,7 (DQ: 4,5-5,2). Aqueles com resposta discordante não eram diferentes dos pacientes com AIDS em geral, mas houve alta frequência de múltiplos esquemas terapêuticos

TAMANHO DA AMOSTRA PARA ESTUDO DA PROPORÇÃO VOLUMÉTRICA DOS CONSTITUINTES DO CORPO LÚTEO BOVINO

O objetivo deste estudo foi estabelecer o número de campos histológicos necessários para quantificar os componentes celulares do corpo lúteo bovino. Para os parâmetros citoplasma das células luteínicas, núcleo das células luteínicas e fibroblasto são necessários 30 campos, enquanto que para células endoteliais e pericito são necessários 35, podendo-se padronizar a técnica em 35 campos e 875 pontos por corpo lúteo. Soybean oil replaced by acidulated soapstock in broiler diets Abstract The purpose of this study was to determine the number of fields necessary for the quantification of the cell types of the bovine corpus luteum. A total of 30 fields is necessary for the quantification of the luteal cell cytoplasm, luteal cell nuclei and fibroblast, and 35 fields for the quantification of endothelial cells and pericycles. For the analysis of both parameters is recommended the study of 35 fields and 875 points per corpus luteum