Monitorização da temperatura do coberto em duas castas de videira: uma ferramenta para comparar genótipos e optimizar a rega deficitária ?

A viticultura mediterrânica enfrenta desafios crescentes relacionados com as alterações climáticas, com recursos hídricos escassos ou de menor qualidade e com maiores exigências de sustentabilidade por parte dos “stakeholders”. Neste domínio, o uso sustentável da água deverá ser uma prioridade nas regiões semi-áridas. Para tal é necessário compreender melhor a fisiologia da videira e a sua resposta ao stress hídrico e térmico, e assegurar a monitorização rápida e eficiente da condição das culturas. A temperatura do coberto (Tc) é um indicador do estado hídrico e do comportamento estomático das plantas. A termografia permite a determinação remota de Tc no campo e visualizar a distribuição das temperaturas em diferentes zonas do coberto (e do solo). A nossa hipótese é a de que padrões diurnos de Tc podem revelar diferenças entre castas em termos das estratégias de controlo estomático/regulação da perda de água e calor. Desta forma monitorizámos o curso diário e sazonal da Tc em duas castas de V. vinifera Aragonez (syn. Tempranillo) (ARA) e Touriga Nacional (TOU) sujeitas a rega deficitária em condições Mediterrânicas (Reguengos de Monsaraz, Alentejo). As medições de Tc foram complementadas pela medição do potencial hídrico, fotossíntese e transpiração, clorofila e parâmetros agronómicos. As medições decorreram ao longo de diferentes estados fenológicos: i) Maio/meados de Junho (vingamento-bago ervilha), ii) meados de Julho (pintor), iii) início de Agosto (meia maturação) e iv) meados e fim de Agosto (antes da colheita). As correlações da Tc (14-17h) com a conductância estomática (gs) e o potencial hídrico (ψ) foram mais robustas em condições/anos de maior stress. A ARA revelou a tendência para potenciais mais negativos, que pode estar relacionado com uma maior área foliar comparativamente à TOU. Todavia as correlações entre parâmetros ecofisiológicos (ψ, gs) e a Tc mantiveram-se idênticas nas duas castas sugerindo que, para os níveis de stress hídrico imposto não se observaram diferenças entre castas na Tc e nas trocas gasosas. Estratégias de optimização do uso da termografia para monitorizar plantas e solo em condições de campo são discutidas numa perspectiva de optimização do uso sustentável da águainfo:eu-repo/semantics/publishedVersio

Apo AIV and citrulline plasma concentrations in Short Bowel Syndrome patients: the influence of Short Bowel Anatomy

Introduction Parenteral nutrition (PN) dependence in short bowel syndrome (SBS) patients is linked to the functionality of the remnant small bowel (RSB). Patients may wean off PN following a period of intestinal adaptation that restores this functionality. Currently, plasma citrulline is the standard biomarker for monitoring intestinal functionality and adaptation. However, available studies reveal that the relationship the biomarker with the length and function of the RSB is arguable. Thus, having additional biomarkers would improve pointing out PN weaning. Aim By measuring concomitant changes in citrulline and the novel biomarker apolipoprotein AIV (Apo AIV), as well as taking into account the anatomy of the RSB, this exploratory study aims to a better understanding of the intestinal adaptation process and characterization of the SBS patients under PN. Methods Thirty four adult SBS patients were selected and assigned to adapted (aSBS) and non-adapted (nSBS) groups after reconstructive surgeries. Remaining jejunum and ileum lengths were recorded. The aSBS patients were either on an oral diet (ORAL group), those with intestinal insufficiency, or on oral and home parenteral nutrition (HPN group), those with chronic intestinal failure. Apo AIV and citrulline were analyzed in plasma samples after overnight fasting. An exploratory ROC analysis using citrulline as gold standard was performed. Results Biomarkers, Apo AIV and citrulline showed a significant correlation with RSBL in aSBS patients. In jejuno-ileocolic patients, only Apo AIV correlated with RSBL (rb = 0.54) and with ileum length (rb = 0.84). In patients without ileum neither biomarker showed any correlation with RSBL. ROC analysis indicated the Apo AIV cut-off value to be 4.6 mg /100 mL for differentiating between the aSBS HPN and ORAL groups. Conclusions Therefore, in addition to citrulline, Apo AIV can be set as a biomarker to monitor intestinal adaptation in SBS patients. As short bowel anatomy is shown to influence citrulline and Apo AIV plasma values, both biomarkers complement each other furnishing a new insight to manage PN dependence

Úlceras genitales de Lipschütz: reporte de un caso pediátrico

Las úlceras genitales son una patología poco frecuente en las consultas de pediatría, pero que generan gran ansiedad familiar. Las úlceras de Lipschütz son úlceras vulvares agudas, dolorosas y autolimitadas de causa desconocida. Aparecen en mujeres jóvenes que no han tenido relaciones sexuales previas o tras un período de abstinencia. Paciente de 10 años con úlceras vulvares dolorosas que, tres días antes de la aparición de las lesiones, había presentado un cuadro de deposiciones diarreicas y fiebre. Se realizó una anamnesis y exploración física detallada y se llevaron a cabo diferentes pruebas complementarias para descartar enfermedades infecciosas de origen venéreo y no venéreo, todas ellas negativas. Se indicó tratamiento sintomático, y se observó, al mes, una completa resolución del cuadro, por lo que se confirmó el diagnóstico de úlceras de Lipschütz. Genital ulcers are a rare entity in pediatric consultation, but they generate great family anxiety. Lipschutz ulcers are acute, painful, and self-limiting vulvar ulcers of unknown cause. These ulcers appear in young women who have not had previous sexual intercourse or after a period of sexual abstinence. We present a 10-year-old girl with painful vulvar ulcers with a 3-day history of diarrhea and fever before the onset of the lesions. A complete anamnesis and detailed physical examination were carried out and complementary tests were performed to investigate sexually and non-sexually transmitted disease; the results were negative. Symptomatic treatment was started; at one-month follow-up a complete resolution of ulcers confirmed the diagnosis of ulcer of Lipschutz

Dynamically generated resonances from the vector octet-baryon decuplet interaction

We study the interaction of the octet of vector mesons with the decuplet of baryons using Lagrangians of the hidden gauge theory for vector interactions. The unitary amplitudes in coupled channels develop poles that can be associated with some known baryonic resonances, while there are predictions for new ones at the energy frontier of the experimental research. The work offers guidelines on how to search for these resonances

DN interaction from meson exchange

A model of the DN interaction is presented which is developed in close analogy to the meson-exchange KbarN potential of the Juelich group utilizing SU(4) symmetry constraints. The main ingredients of the interaction are provided by vector meson (rho, omega) exchange and higher-order box diagrams involving D*N, D\Delta, and D*\Delta intermediate states. The coupling of DN to the pi-Lambda_c and pi-Sigma_c channels is taken into account. The interaction model generates the Lambda_c(2595) resonance dynamically as a DN quasi-bound state. Results for DN total and differential cross sections are presented and compared with predictions of an interaction model that is based on the leading-order Weinberg-Tomozawa term. Some features of the Lambda_c(2595) resonance are discussed and the role of the near-by pi-Sigma_c threshold is emphasized. Selected predictions of the orginal KbarN model are reported too. Specifically, it is pointed out that the model generates two poles in the partial wave corresponding to the Lambda(1405) resonance.Comment: 14 pages, 8 figure

Embedded pitch adapters: a high-yield interconnection solution for strip sensors

A proposal to fabricate large area strip sensors with integrated, or embedded, pitch adapters is presented for the End-cap part of the Inner Tracker in the ATLAS experiment. To implement the embedded pitch adapters, a second metal layer is used in the sensor fabrication, for signal routing to the ASICs. Sensors with different embedded pitch adapters have been fabricated in order to optimize the design and technology. Inter-strip capacitance, noise, pick-up, cross-talk, signal efficiency, and fabrication yield have been taken into account in their design and fabrication. Inter-strip capacitance tests taking into account all channel neighbors reveal the important differences between the various designs considered. These tests have been correlated with noise figures obtained in full assembled modules, showing that the tests performed on the bare sensors are a valid tool to estimate the final noise in the full module. The full modules have been subjected to test beam experiments in order to evaluate the incidence of cross-talk, pick-up, and signal loss. The detailed analysis shows no indication of cross-talk or pick-up as no additional hits can be observed in any channel not being hit by the beam above 170 mV threshold, and the signal in those channels is always below 1% of the signal recorded in the channel being hit, above 100 mV threshold. First results on irradiated mini-sensors with embedded pitch adapters do not show any change in the interstrip capacitance measurements with only the first neighbors connected

Evaluation of the performance of irradiated silicon strip sensors for the forward detector of the ATLAS Inner Tracker Upgrade

The upgrade to the High-Luminosity LHC foreseen in about ten years represents a great challenge for the ATLAS inner tracker and the silicon strip sensors in the forward region. Several strip sensor designs were developed by the ATLAS collaboration and fabricated by Hamamatsu in order to maintain enough performance in terms of charge collection efficiency and its uniformity throughout the active region. Of particular attention, in the case of a stereo-strip sensor, is the area near the sensor edge where shorter strips were ganged to the complete ones. In this work the electrical and charge collection test results on irradiated miniature sensors with forward geometry are presented. Results from charge collection efficiency measurements show that at the maximum expected fluence, the collected charge is roughly halved with respect to the one obtained prior to irradiation. Laser measurements show a good signal uniformity over the sensor. Ganged strips have a similar efficiency as standard strips

Conservation of Salmonella Infection Mechanisms in Plants and Animals

Salmonella virulence in animals depends on effectors injected by Type III Secretion Systems (T3SSs). In this report we demonstrate that Salmonella mutants that are unable to deliver effectors are also compromised in infection of Arabidopsis thaliana plants. Transcriptome analysis revealed that in contrast to wild type bacteria, T3SS mutants of Salmonella are compromised in suppressing highly conserved Arabidopsis genes that play a prominent role during Salmonella infection of animals. We also found that Salmonella originating from infected plants are equally virulent for human cells and mice. These results indicate a high degree of conservation in the defense and infection mechanism of animal and plant hosts during Salmonella infection

Elective Cancer Surgery in COVID-19-Free Surgical Pathways During the SARS-CoV-2 Pandemic: An International, Multicenter, Comparative Cohort Study.

PURPOSE: As cancer surgery restarts after the first COVID-19 wave, health care providers urgently require data to determine where elective surgery is best performed. This study aimed to determine whether COVID-19-free surgical pathways were associated with lower postoperative pulmonary complication rates compared with hospitals with no defined pathway. PATIENTS AND METHODS: This international, multicenter cohort study included patients who underwent elective surgery for 10 solid cancer types without preoperative suspicion of SARS-CoV-2. Participating hospitals included patients from local emergence of SARS-CoV-2 until April 19, 2020. At the time of surgery, hospitals were defined as having a COVID-19-free surgical pathway (complete segregation of the operating theater, critical care, and inpatient ward areas) or no defined pathway (incomplete or no segregation, areas shared with patients with COVID-19). The primary outcome was 30-day postoperative pulmonary complications (pneumonia, acute respiratory distress syndrome, unexpected ventilation). RESULTS: Of 9,171 patients from 447 hospitals in 55 countries, 2,481 were operated on in COVID-19-free surgical pathways. Patients who underwent surgery within COVID-19-free surgical pathways were younger with fewer comorbidities than those in hospitals with no defined pathway but with similar proportions of major surgery. After adjustment, pulmonary complication rates were lower with COVID-19-free surgical pathways (2.2% v 4.9%; adjusted odds ratio [aOR], 0.62; 95% CI, 0.44 to 0.86). This was consistent in sensitivity analyses for low-risk patients (American Society of Anesthesiologists grade 1/2), propensity score-matched models, and patients with negative SARS-CoV-2 preoperative tests. The postoperative SARS-CoV-2 infection rate was also lower in COVID-19-free surgical pathways (2.1% v 3.6%; aOR, 0.53; 95% CI, 0.36 to 0.76). CONCLUSION: Within available resources, dedicated COVID-19-free surgical pathways should be established to provide safe elective cancer surgery during current and before future SARS-CoV-2 outbreaks