ANÁLISIS FLORÍSTICO DE LA REGENERACIÓN NATURAL DEL BOSQUE SEMIDECIDUO MESÓFILO DE LA ESTACIÓN EXPERIMENTAL AGROFORESTAL DE GUISA (Original)

The work was carried out in the Forest of the Agro-forestry Experimental Station Guisa to analyze the floristic structure plots of 100 m2 and 4 m2 nested were randomly established, the normal diameter and height of the trees were taken, as well as the height of the plants smaller than 4 meters in height and ≤ 5 cm in diameter. Species were identified; the biological spectrum was made to assess floristic diversity, and the presence histogram to observe the heterogeneity of the species. The families Sapindaceae, Rubiaceae and Fabaceae were the most rich in species. The most constants and better distributed species under the forest roof were Eugenia buxifolia, Nectandra coriacea and Sideroxylon salicifolium, forming a BDP which allowed to the species respond to the stress of the place in an efficient way and for this they establish the physiognomy of the regenerant stratus.El trabajo se realizó en el Bosque de la Estación Experimental Agroforestal Guisa para analizar la estructura florística. Se establecieron aleatoriamente parcelas de 100 m2 y de 4 m2 anidadas, se tomó el diámetro normal y altura de los árboles, así como la altura de las plantas menores de 4 m de altura y ≤ 5 cm de diámetro. Se identificaron las especies, se confeccionó el espectro biológico para valorar la diversidad florística, y el histograma de presencia para observar la heterogeneidad de la misma. Las familias Sapindaceae, Rubiaceae y Fabaceae resultaron las de mayor riqueza de especies. Las especies más abundantes, constantes y mejor distribuidas bajo el dosel del bosque fueron Eugenia buxifolia, Nectandra coriacea y Sideroxylon salicifolium, formando banco de plántulas que les permite responder adaptativamente al estrés del sitio de forma eficiente y por tanto establecen la fisionomía del estrato regenerante

Factores de riesgo para páncreas hiperecogénico en ecoendoscopía: estudio de casos y controles

Identificar con ecoendoscopía (EE) páncreas hiperecogénico y determinar factores de riesgo para el mismo en una muestra de pacientes evaluados entre Junio 2005-Mayo 2010. Material y métodos: Estudio de casos y controles, retrospectivo, en una población de 5495 pacientes evaluados, de los cuales se seleccionaron 989 como casos (con un aumento de ecogenicidad parcial o global del páncreas) y 642 controles (con ecopatrón pancreático normal). Se compararon variables demográficas, clínicas y ecoendoscópicas entre ambos grupos de estudios y se calcularon OR y sus correspondiente IC95% después de realizar análisis bivariado y multivariado de los factores de riesgo. Resultados: En la población evaluada, los factores de riesgo identificados con mayor fuerza de asociación en el análisis multivariado fueron esteatosis hepática (OR=29,581; IC95% 17,942-48,770), hepatopatía mixta (OR=10,724; IC95% 1,634-70,378), hipotiroidismo (OR=8,381; IC95% 2,067-33,977) y tabaquismo (OR=2,790; IC95% 1,036-7,515). Otros factores asociados en menor magnitud fueron: hepatopatía crónica, antecedentes familiares de diabetes mellitus e hipertensión arterial, edad e índice de masa corporal. Conclusiones: Existen escasos estudios que hayan identificado factores de riesgo para esteatosis pancreática empleando EE. Los hallazgos encontrados concuerdan con lo reportado recientemente en otros estudios internacionales donde la esteatosis hepática fue el predictor de mayor fuerza para encontrar en la EE páncreas hiperecogénico (OR=29). Sin embargo, el presente estudio encontró una asociación dos veces mayor a la previamente reportada. En adición a ello se observa claramente que en el presente estudio existen múltiples factores asociados al hallazgo de páncreas hiperecogénico que deben ser tomados en cuenta.To identify through ecoendoscopy (EE) hyperecogenic pancreas and to determinate risk factors for it in a sample of patients evaluated between June 2005 and May 2010. Material and methods: Cases and controls study, retrospective observational study, in a population of 5,495 patients; from them 989 were selected as cases (with an increase of partial or global ecogenicity of the pancreas) and 642 controls (with a normal pancreatic ecopattern). Demographical, clinical and ecoendoscopical variables from both groups were compared; OR were calculated with their 95%CI, after bivariate and multivariate risk factors analyses. Results: In the studied population, identified risk factors, mostly associated at the multivariate analyses, included: liver steatosis (OR=29.581; 95%CI 17.942-48.770), mixed hepatopathy (OR=10.724; 95%CI 1.63470.378), hypothyroidism (OR=8.381; 95%CI 2.067-33.977) and smoking (OR=2.790; 95%CI 1.036-7.515). Other factors were: chronic hepatopathy, family history of diabetes mellitus and high blood pressure, age and body mass index. Conclusions: There are few studies regard the identification of risk factors for pancreatic steatosis using EE. Current findings are similar with others recently reported in other countries, where liver steatosis is a predictor to find hyperecogenic pancreas at the EE (OR=29). However, this study found an association two-fold higher than that previously reported. In addition, is clear that in this study there are multiple factors associated with the finding of hyperecogenic pancreas that should be considered

Correction of anemia in pregnancy

Analía Cánepa: Estudiante de Medicina, Ciclo de Metodología Científica II, Facultad de Medicina, Universidad de la República. Uruguay. La contribución en la realización del trabajo fue equivalente a la de los demás estudiantes.-- Andrea Herrerín: Estudiante de Medicina, Ciclo de Metodología Científica II, Facultad de Medicina, Universidad de la República. Uruguay. La contribución en la realización del trabajo fue equivalente a la de los demás estudiantes.-- Virginia Rodríguez Sande: Estudiante de Medicina, Ciclo de Metodología Científica II, Facultad de Medicina, Universidad de la República. Uruguay. La contribución en la realización del trabajo fue equivalente a la de los demás estudiantes.-- María Trombotti: Estudiante de Medicina, Ciclo de Metodología Científica II, Facultad de Medicina, Universidad de la República. Uruguay. La contribución en la realización del trabajo fue equivalente a la de los demás estudiantes.-- Carina Pizzarossa: Docente supervisor. Departamento de Medicina del Hospital de Clínicas, Facultad de Medicina, Universidad de la República, Uruguay.-- Leonardo Sosa: Docente supervisor. Departamento de Medicina del Hospital de Clínicas, Facultad de Medicina, Universidad de la República, Uruguay. Contacto: Leonardo Sosa. E-mail: [email protected] anemia afecta a casi la mitad de las mujeres embarazadas a nivel mundial teniendo importantes consecuencias sobre el binomio materno-fetal. Su principal causa es la deficiencia de hierro. A pesar de que es fácil de detectar y tratar e implica un bajo costo sanitario se cree que en la mayoría de los casos no se llegan a corregir los valores de hemoglobina y ferritina de las gestantes. Se realizó un estudio observacional, descriptivo de corte transversal, donde fue estudiada la frecuencia de la corrección de anemia en la población de pacientes asistidas en la Policlínica de Alto Riesgo Obstétrico del Hospital de Clínicas, en el período 2007 - 2013. A partir de una base de datos preexistente se obtuvo una muestra de 134 pacientes que presentaron anemia durante el embarazo. En base a la revisión de sus historias clínicas se buscó la asociación de variables que pudieran influir en los resultados obtenidos, como estado nutricional materno al inicio de la gestación, período intergenésico de riesgo, captación precoz del embarazo y severidad de la anemia, utilizando el test de Chi-cuadrado. Se observó que en el 50% de las pacientes estudiadas no se logró corregir la anemia. Concluimos que existe una dificultad en la corrección de la anemia y una necesidad de realizar futuros estudios que permitan conocer las causas de este problema e implementar acciones en base a ellas.Anemia affects almost half of pregnant women worldwide having important consequences on the maternal-fetal binomial. The main cause is iron deficiency. Although it is easy to detect and treat and involves low health budgets, it is believed that in most cases hemoglobin and ferritin levels in pregnant women are not corrected. A cross-sectional descriptive observational investigation was conducted to study the frequency of anemia correction in patients treated at the High Risk Obstetrics polyclinic in the Hospital de Clínicas in 2007 - 2013. From a preexisting database a sample of 134 patients who had anemia during pregnancy was obtained. Based on the review of clinical records, the variables association that could influence the results, such as maternal nutritional status in early pregnancy, birth risk period, early detection of pregnancy and severity of anemia, were analyzed using the Chi-square test. It was noted that in 50% of patients studied anemia had not been corrected. We conclude there is a difficulty to correct anemia and a need for future studies to determine the causes of this problem and implement actions based on them

Constraints on the χ_(c1) versus χ_(c2) polarizations in proton-proton collisions at √s = 8 TeV

The polarizations of promptly produced χ_(c1) and χ_(c2) mesons are studied using data collected by the CMS experiment at the LHC, in proton-proton collisions at √s=8  TeV. The χ_c states are reconstructed via their radiative decays χ_c → J/ψγ, with the photons being measured through conversions to e⁺e⁻, which allows the two states to be well resolved. The polarizations are measured in the helicity frame, through the analysis of the χ_(c2) to χ_(c1) yield ratio as a function of the polar or azimuthal angle of the positive muon emitted in the J/ψ → μ⁺μ⁻ decay, in three bins of J/ψ transverse momentum. While no differences are seen between the two states in terms of azimuthal decay angle distributions, they are observed to have significantly different polar anisotropies. The measurement favors a scenario where at least one of the two states is strongly polarized along the helicity quantization axis, in agreement with nonrelativistic quantum chromodynamics predictions. This is the first measurement of significantly polarized quarkonia produced at high transverse momentum

Safety and effectiveness of CIMAvax-EGF administered in community polyclinics

In spite of the advances in immunotherapy and targeted therapies, lung cancer continues to be the leading cause of cancer-related death. The epidermal growth factor receptor is an established target for non-small cell lung cancer (NSCLC), and its overactivation by the ligands can induce accelerated proliferation, angiogenesis, and metastasis as well as proinflammatory or immunosuppressive signals. CIMAvax-EGF is an epidermal growth factor (EGF)-depleting immunotherapy that is approved for the treatment of NSCLC patients in Cuba. The study was designed as a phase IV trial to characterize the safety and effectiveness of CIMAvax-EGF in advanced NSCLC patients treated in 119 community polyclinics and 24 hospitals. CIMAvax-EGF treatment consisted of four bi-weekly doses followed by monthly boosters. Overall, 741 NSCLC patients ineligible for further cancer-specific treatment were enrolled. CIMAvax-EGF was safe, and the most common adverse events consisted of mild-to-moderate injection site reactions, fever, chills, tremors, and headache. For patients completing the loading doses, the median survival was 9.9 months. For individuals achieving at least stable disease to the frontline and completing vaccination induction, the median survival was 12 months. Most of the functional activities and symptoms evaluated through the European Organisation for Research and Treatment of Cancer (EORTC) QLQ-C30 questionnaire improved over time. In conclusion, this real-world trial demonstrated that CIMAvax-EGF was safe and effective in patients who were vaccinated in the maintenance scenario. A larger effect was seen in subjects with poor prognosis like those with squamous tumors and high EGF levels. Remarkably, this community-based intervention was very important because it demonstrated the feasibility of treating advanced lung cancer patients with active immunotherapy in primary care institutions. In addition to CIMAvax-EGF, patients received supportive care at the community clinic. Vaccine administration by the family doctors at the polyclinics reduced the patients’ burden on the medical oncology services that continued providing chemotherapy and other complex therapies. We conclude that community polyclinics constitute the optimal scenario for administering those cancer vaccines that are safe and require prolonged maintenance in patients with advanced cancer, despite the continuous deterioration of their general condition.Clinical trial registrationhttps://rpcec.sld.cu/trials/RPCEC00000205-En, identifier RPCEC00000205

Search for new particles in events with energetic jets and large missing transverse momentum in proton-proton collisions at root s=13 TeV

A search is presented for new particles produced at the LHC in proton-proton collisions at root s = 13 TeV, using events with energetic jets and large missing transverse momentum. The analysis is based on a data sample corresponding to an integrated luminosity of 101 fb(-1), collected in 2017-2018 with the CMS detector. Machine learning techniques are used to define separate categories for events with narrow jets from initial-state radiation and events with large-radius jets consistent with a hadronic decay of a W or Z boson. A statistical combination is made with an earlier search based on a data sample of 36 fb(-1), collected in 2016. No significant excess of events is observed with respect to the standard model background expectation determined from control samples in data. The results are interpreted in terms of limits on the branching fraction of an invisible decay of the Higgs boson, as well as constraints on simplified models of dark matter, on first-generation scalar leptoquarks decaying to quarks and neutrinos, and on models with large extra dimensions. Several of the new limits, specifically for spin-1 dark matter mediators, pseudoscalar mediators, colored mediators, and leptoquarks, are the most restrictive to date.Peer reviewe

Probing effective field theory operators in the associated production of top quarks with a Z boson in multilepton final states at root s=13 TeV

Peer reviewe

Combined searches for the production of supersymmetric top quark partners in proton-proton collisions at root s=13 TeV

A combination of searches for top squark pair production using proton-proton collision data at a center-of-mass energy of 13 TeV at the CERN LHC, corresponding to an integrated luminosity of 137 fb(-1) collected by the CMS experiment, is presented. Signatures with at least 2 jets and large missing transverse momentum are categorized into events with 0, 1, or 2 leptons. New results for regions of parameter space where the kinematical properties of top squark pair production and top quark pair production are very similar are presented. Depending on themodel, the combined result excludes a top squarkmass up to 1325 GeV for amassless neutralino, and a neutralinomass up to 700 GeV for a top squarkmass of 1150 GeV. Top squarks with masses from 145 to 295 GeV, for neutralino masses from 0 to 100 GeV, with a mass difference between the top squark and the neutralino in a window of 30 GeV around the mass of the top quark, are excluded for the first time with CMS data. The results of theses searches are also interpreted in an alternative signal model of dark matter production via a spin-0 mediator in association with a top quark pair. Upper limits are set on the cross section for mediator particle masses of up to 420 GeV

Measurement of the top quark forward-backward production asymmetry and the anomalous chromoelectric and chromomagnetic moments in pp collisions at √s = 13 TeV

Abstract The parton-level top quark (t) forward-backward asymmetry and the anomalous chromoelectric (d̂ t) and chromomagnetic (μ̂ t) moments have been measured using LHC pp collisions at a center-of-mass energy of 13 TeV, collected in the CMS detector in a data sample corresponding to an integrated luminosity of 35.9 fb−1. The linearized variable AFB(1) is used to approximate the asymmetry. Candidate t t ¯ events decaying to a muon or electron and jets in final states with low and high Lorentz boosts are selected and reconstructed using a fit of the kinematic distributions of the decay products to those expected for t t ¯ final states. The values found for the parameters are AFB(1)=0.048−0.087+0.095(stat)−0.029+0.020(syst),μ̂t=−0.024−0.009+0.013(stat)−0.011+0.016(syst), and a limit is placed on the magnitude of | d̂ t| < 0.03 at 95% confidence level. [Figure not available: see fulltext.