Danos causados por ovelhas em árvores de eucalipto em um sistema silvipastoril distribuido em dois modelos espaciais.

O experimento foi realizado na Unidade de Pesquisa e Desenvolvimento de Itapetininga da Agência Paulista de Tecnologia dos Agronegócios, Itapetininga, SP, Brasil. Avaliou-se o efeito do impacto das ovelhas nas árvores em um sistema silvipastoril em dois modelos de distribuição espacial de plantio do eucalipto (em fileira única ou em fileira dupla) e do manejo de desrama (com ou sem desrama). As variáveis Danos, Altura e Altura do Dano forma afetadas significativamente pela interação modelo espacial e manejo de desrama. O modelo espacial Fileira Dupla com Desrama apresentou menor nota atribuída a danos observados nas árvores (p<0,05). A altura (H) também foi menor no modelo espacial Fileira Dupla com desrama e a Altura do Dano foi menor para o modelo espacial fileira dupla com desrama e sem desrama. A análise dos resultados mostrou não ter havido interação entre modelo espacial e manejo de desrama para o diâmetro a altura do peito (DAP). Para a DAP foi verificado efeito significativo apenas para o fator desrama, ou seja, a DAP foi maior nas árvores que não sofreram desrama. O dano de maior incidência nesse sistema foi o de casca lesionada e ruída (Cl, 85,66% das árvores avaliadas). Os tratamentos que foram realizadas a desrama não sofreram o dano quebra de ramos em função da altura que foi realizada a desrama. Apesar de não ter comprometido o desenvolvimento do eucalipto, as ovelhas (animais adultos) danificam severamente as árvores dentro do sistema silvipastoril. Futuros estudos devem ser planejados para entendermos melhor qual o fator de atração para o consumo da casca das árvores de eucalipto

High resolution near-IR spectra of NGC 6624 and NGC 6569

We present the first abundances analysis based on high-resolution infrared (IR) echelle spectra of NGC 6569 and NGC 6624, two moderately reddened globular clusters located in the outer bulge of the Galaxy. We find [Fe/H]=-0.79$\pm$0.02 dex and [Fe/H]=-0.69$\pm$0.02 dex for NGC 6569 and NGC 6624, respectively and an average $\alpha$-elements enhancement of $\approx$+0.43$\pm$0.02 dex and +0.39$\pm$0.02 dex, consistent with previous measurements on other metal-rich Bulge clusters. We measure accurate radial velocities of $\rm =-47\pm 4 km s^{-1}$ and $\rm =+51\pm 3 km s^{-1}$ and velocity dispersions of $\rm \approx 8 km s^{-1}$ and $\rm \approx6 km s^{-1}$ for NGC 6569 and NGC 6624, respectively. Finally, we find very low $^{12}C/^{13}C$ isotopics ratio ($\leq$7 in NGC 6624 and $\approx$5 in NGC 6569), confirming the presence extra-mixing mechanisms during the red giant branch evolution phase.Comment: 7 pages, 3 figures, accepted for publication on MNRA

Practical guidelines for the early diagnosis of Sjogren's syndrome in primary healthcare

Primary care physicians can play a crucial role by recognising Sjogren's syndrome (SS) in the early stages identifying those patients with the greatest probability of being diagnosed with SS. SS has a very specific epidemiological profile at presentation (female aged 3050 years), which may aid an early diagnosis. Although the disease may be expressed in many guises, there are three predominant clinical presentations that should be considered as key clues to increased clinical suspicion (multiple symptoms of dryness, asthenia-polyalgia syndrome and systemic organ-specific manifestations). The physical examination may provide important clues to systemic involvement (parotid gland enlargement, skin lesions suggestive of purpura or annular erythema, respiratory crackles, arthritis, neurological sensory or motor deficits). Simple laboratory studies may be very useful in reinforcing the clinical suspicion of SS, and the triad of cytopenia, raised erythrocyte sedimentation rate and high serum gamma globulin levels is a very specific "biological" pattern suggesting SS. A solid clinical suspicion of SS requires both the patient reporting sicca symptoms and objective evidence that these symptoms are associated with dysfunction of the lachrymal and salivary glands. Ultrasonography of the parotid glands, a non-invasive method, may be a major advance in the diagnostic approach to SS in primary care. Primary care physicians must be considered essential members of the multidisciplinary team in charge of the follow-up of SS patients, due to their key role in the continuum of patient care and their cross-sectional knowledge of common diseases that frequently coexist in patients with SS.</p

Metal Transport in the Rhizobium-Legume Symbiosis

Metal Transport in the Rhizobium-legume Symbiosi

Tropical Cyclone Landfall Frequency and Large-Scale Environmental Impacts along Karstic Coastal Regions (Yucatan Peninsula, Mexico)

Tropical cyclones (TCs) are natural systems that develop over ocean basins and are key components of the atmospheric activity during the warm season. However, there are still knowledge gaps about the combined positive and negative TC impacts on the structure and function of coastal socio-ecosystems. Using remote sensing tools, we analyzed the frequency, trajectory, and intensity of 1894 TCs from 1851-2019 to identify vulnerable hotspots across the Yucatan Peninsula (YP), Mexico. A total of 151 events hit the YP, with 96% of landings on the eastern coast. We focused on three major hurricanes (Emily and Wilma, 2005; Dean, 2007) and one tropical storm (Stan, 2005) to determine the impacts on cumulative precipitation, vegetation change, and coastal phytoplankton (Chl-a) distribution across the YP. Despite a short inland incursion, Wilma\u27s environmental damage was coupled to strong winds (157-241 km/h), slow motion (4-9 km/h), and heavy precipitation (up to 770 mm). Because of an extensive footprint, Wilma caused more vegetation damage (29%) than Dean (20%), Emily (7%), and Stan (2%). All TCs caused a Chl-aincrease associated to submarine discharge and upwelling off the peninsula coastlines. Disaster risk along the coast underscores negative economic impacts and positive ecological benefits at the regional scale

Alpha element abundances and gradients in the Milky Way bulge from FLAMES-GIRAFFE spectra of 650 K giants

We obtained FLAMES-GIRAFFE spectra (R=22,500) at the ESO Very Large Telescope for 650 bulge red giant branch (RGB) stars and performed spectral synthesis to measure Mg, Ca, Ti, and Si abundances. This sample is composed of 474 giant stars observed in 3 fields along the minor axis of the Galactic bulge and at latitudes b=-4, b=-6, b=-12. Another 176 stars belong to a field containing the globular cluster NGC 6553, located at b=-3 and 5 degrees away from the other three fields along the major axis. Our results confirm, with large number statistics, the chemical similarity between the Galactic bulge and thick disk, which are both enhanced in alpha elements when compared to the thin disk. In the same context, we analyze [alpha/Fe] vs. [Fe/H] trends across different bulge regions. The most metal rich stars, showing low [alpha/Fe] ratios at b=-4 disappear at higher Galactic latitudes in agreement with the observed metallicity gradient in the bulge. Metal-poor stars ([Fe/H]<-0.2) show a remarkable homogeneity at different bulge locations. We have obtained further constrains for the formation scenario of the Galactic bulge. A metal-poor component chemically indistinguishable from the thick disk hints for a fast and early formation for both the bulge and the thick disk. Such a component shows no variation, neither in abundances nor kinematics, among different bulge regions. A metal-rich component showing low [alpha/Fe] similar to those of the thin disk disappears at larger latitudes. This allows us to trace a component formed through fast early mergers (classical bulge) and a disk/bar component formed on a more extended timescale.Comment: 13 pages, 17 figures. Accepted for publication in Astronomy and Astrophysic

The fate of (phantom) dark energy universe with string curvature corrections

We study the evolution of (phantom) dark energy universe by taking into account the higher-order string corrections to Einstein-Hilbert action with a fixed dilaton. While the presence of a cosmological constant gives stable de-Sitter fixed points in the cases of heterotic and bosonic strings, no stable de-Sitter solutions exist when a phantom fluid is present. We find that the universe can exhibit a Big Crunch singularity with a finite time for type II string, whereas it reaches a Big Rip singularity for heterotic and bosonic strings. Thus the fate of dark energy universe crucially depends upon the type of string theory under consideration.Comment: 6 pages and 3 figures, discussion on dynamically evolving dilaton and modulus included, references added, version to appear in Physics Letters

Hemoglobinopatias no Distrito Federal, Brasil

Em uma amostra de 3137 pessoas, residentes no Distrito Federal, foram detectadas as seguintes hemoglobinas: em 3009(95,92%) HbAA; em 91 (2,90%) HbAS; em 20(0,64%) HbAC; em 8 (0,26%) talassemia beta minor; em 5(0,16%) HbAJ alfa; em 3 (0,09%) HbAM e em 1 (0,03%) talassemia major associada com HbAS. A HbAS têm as seguintes freqüências, quanto ao grupo racial: branco - 1,84%; mulato claro 2,55%; mulato médio-3,68%; mulato escuro - 6,80%; negro -10,43% e mestiço de índio -3,85%.The hemoglobins of 3137 persons from the Federal District, Brazil was studied. The identified types of hemoglobins were: HbAA (3009 - 95,92%); HbAS (91 - 2,90%); HbAC (20 - 0,64%) beta thalassemia minor (8 - 0,26%); HbAJ alpha (5 - 0,16%); HbAM (3 - 0,09%) and beta thalassemia major/HbS (1 - 0,03%). The frequencies of sickle cell trait (HbAS) of each racial class were: white (1,84%); light mulatto (2,55%); medium mulatto (3,68%); dark mulatto(6,80%), negro (10,43%)and indian mestizo (3,85%)