Dermatofitosis en gatos domésticos (Felis catus) positivos a retrovirus

The aim of this study was to isolate dermatophyte fungi from dermal lesions present in domestic cats (Felis catus) positive to immunodeficiency virus (FIV) and feline leukemia virus (FelLeF) retrovirals. Thirty-five felines were studied: 9 positives to FIV, 24 to VLeF and 2 to both viruses, patients of the veterinary clinic of the Santo Tomás University of Santiago de Chile. Hair and skin scale samples were obtained from skin lesions suspected of dermatophytosis, which were analyzed by direct microscopic examination and culture to identify mycotic agents. Results showed that 68.6% of the cats were diagnosed with dermatophytosis, Microsporum canis being the main isolated agent. The results indicate a significant association between the presence of dermatophytosis and the immunological compromise of the patients.El objetivo de este estudio fue aislar hongos dermatofitos desde lesiones dérmicas presentes en gatos domésticos (Felis catus) positivos a los retrovirus virus de la inmunodeficiencia felina (VIF) y virus de la leucemia felina (VLeF). Fueron estudiados 35 felinos: 9 positivos a VIF, 24 a VLeF y 2 a ambos virus, atendidos en la clínica veterinaria de la Universidad Santo Tomás de Santiago de Chile. Las muestras de pelos y escamas fueron obtenidas desde las lesiones dérmicas sospechosas de dermatofitosis, las cuales fueron analizadas mediante examen microscópico directo y cultivo para identificar a los agentes micóticos. El 68.6% de los felinos fueron diagnosticados con dermatofitosis, siendo Microsporum canis el principal agente aislado. Los resultados indican una asociación significativa entre la presencia de dermatofitosis y el compromiso inmunológico de los pacientes

Rancidity development during the chilled storage of farmed Coho salmon (Oncorhynchus kisutch)

7 páginas, 4 figuras, 2 tablasCoho salmon (Oncorhynchus kisutch) is a fatty fish species whose farming production has greatly increased in recent years. Lipid damage produced during Coho salmon chilled storage was studied for up to 24 d. Lipid hydrolysis (free fatty acids, FFA) and oxidation (conjugated dienes; peroxide value, PV; thiobarbituric acid index, TBA-i; fluorescent compounds formation, FR; browning development) were determined and compared to lipid composition (polyene index, PI; astaxanthin, AX) changes and sensory assessment (rancid odour development) results. Most lipid damage indices developed slowly during storage; thus, values obtained for FFA, PV, TBA-i and FR were in all cases under 1.5 g/100 g, 4.0 meq oxygen/kg lipid, 0.40 mg malondialdehyde/kg muscle and 0.40, respectively. Odour assessment showed a significant (p <0.05) rancidity development at day 10, when compared to starting fish material; then, non-acceptable values were obtained at days 19 and 24. The PI analysis showed not many differences during the storage time, with the lowest mean value at day 19. AX analysis indicated a relatively high content in the white muscle, which was maintained till the end of the experiment. A low oxidation development is concluded for Coho salmon lipids when compared to other fatty fish species under the same chilling conditions. AX was found to contribute to the oxidation stability of Coho salmon lipids, due to its free radical scavenger propertiesPeer reviewe

Detección de Helicobacter spp en la mucosa gástrica de felinos domésticos clínicamente sanos mediante la prueba rápida de ureasa e histopatología

The aim of this study was to detect Helicobacter spp through the rapid urease test and histopathology in clinically healthy domestic felines (Felis silvestris catus) and to establish the degree of concordance between both methods. Fifteen cats without clinical signs of gastrointestinal disease, between 2 and 7 years old, without distinction of breed and sex, without dietary changes and without having undergone antibiotic or proton pump inhibitor therapy in the last 90 days were included. Endoscopy was performed to macroscopically evaluate the gastric mucosa and obtain biopsies of the gastric fundus and body. It was determined, with both tests, that 86.6% of the samples were positive for the presence of Helicobacter spp, finding 100% concordance between the two tests. In 40% (6/15) of the felines macroscopic lesions were observed in the gastric mucosa, but no association was found between the lesions with the presence of Helicobacter spp. It is concluded that 86.6% of the felines presented colonization by Helicobacter spp, and that the rapid urease test constitutes a reliable method for the diagnosis of infection by Helicobacter spp.El objetivo del estudio fue detectar Helicobacter spp a través de la prueba rápida de ureasa e histopatología en felinos domésticos (Felis silvestris catus) clínicamente sanos y establecer el grado de concordancia entre ambos métodos. Se incluyeron 15 gatos sin signos clínicos de enfermedad gastrointestinal, entre 2 y 7 años, sin distinción de raza y sexo, sin cambios dietarios y sin haber sido sometidos a terapias con antibióticos o inhibidores de la bomba de protones en los últimos 90 días. Se realizó la endoscopia para evaluar macroscópicamente la mucosa gástrica y obtener biopsias del fondo y cuerpo gástrico. Se determinó, con ambas pruebas, que 86.6% de las muestras fueron positivas a la presencia de Helicobacter spp, encontrándose 100% de concordancia entre las dos pruebas. En el 40% (6/15) de los felinos se observaron lesiones macroscópicas en mucosa gástrica, pero no se encontró asociación entre las lesiones con la presencia de Helicobacter spp. Se concluye que 86.6% de los felinos presentaron colonización por Helicobacter spp, y que la prueba rápida de ureasa constituye un método confiable para el diagnóstico de infección por Helicobacter spp

Optimasi Portofolio Resiko Menggunakan Model Markowitz MVO Dikaitkan dengan Keterbatasan Manusia dalam Memprediksi Masa Depan dalam Perspektif Al-Qur`an

Risk portfolio on modern finance has become increasingly technical, requiring the use of sophisticated mathematical tools in both research and practice. Since companies cannot insure themselves completely against risk, as human incompetence in predicting the future precisely that written in Al-Quran surah Luqman verse 34, they have to manage it to yield an optimal portfolio. The objective here is to minimize the variance among all portfolios, or alternatively, to maximize expected return among all portfolios that has at least a certain expected return. Furthermore, this study focuses on optimizing risk portfolio so called Markowitz MVO (Mean-Variance Optimization). Some theoretical frameworks for analysis are arithmetic mean, geometric mean, variance, covariance, linear programming, and quadratic programming. Moreover, finding a minimum variance portfolio produces a convex quadratic programming, that is minimizing the objective function ðð¥with constraintsð ð 𥠥 ðandð´ð¥ = ð. The outcome of this research is the solution of optimal risk portofolio in some investments that could be finished smoothly using MATLAB R2007b software together with its graphic analysis

Search for heavy resonances decaying to two Higgs bosons in final states containing four b quarks

A search is presented for narrow heavy resonances X decaying into pairs of Higgs bosons (H) in proton-proton collisions collected by the CMS experiment at the LHC at root s = 8 TeV. The data correspond to an integrated luminosity of 19.7 fb(-1). The search considers HH resonances with masses between 1 and 3 TeV, having final states of two b quark pairs. Each Higgs boson is produced with large momentum, and the hadronization products of the pair of b quarks can usually be reconstructed as single large jets. The background from multijet and t (t) over bar events is significantly reduced by applying requirements related to the flavor of the jet, its mass, and its substructure. The signal would be identified as a peak on top of the dijet invariant mass spectrum of the remaining background events. No evidence is observed for such a signal. Upper limits obtained at 95 confidence level for the product of the production cross section and branching fraction sigma(gg -> X) B(X -> HH -> b (b) over barb (b) over bar) range from 10 to 1.5 fb for the mass of X from 1.15 to 2.0 TeV, significantly extending previous searches. For a warped extra dimension theory with amass scale Lambda(R) = 1 TeV, the data exclude radion scalar masses between 1.15 and 1.55 TeV

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| &lt; 0.03 at 95% confidence level. [Figure not available: see fulltext.

MUSiC : a model-unspecific search for new physics in proton-proton collisions at root s=13TeV

Results of the Model Unspecific Search in CMS (MUSiC), using proton-proton collision data recorded at the LHC at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 35.9 fb(-1), are presented. The MUSiC analysis searches for anomalies that could be signatures of physics beyond the standard model. The analysis is based on the comparison of observed data with the standard model prediction, as determined from simulation, in several hundred final states and multiple kinematic distributions. Events containing at least one electron or muon are classified based on their final state topology, and an automated search algorithm surveys the observed data for deviations from the prediction. The sensitivity of the search is validated using multiple methods. No significant deviations from the predictions have been observed. For a wide range of final state topologies, agreement is found between the data and the standard model simulation. This analysis complements dedicated search analyses by significantly expanding the range of final states covered using a model independent approach with the largest data set to date to probe phase space regions beyond the reach of previous general searches.Peer reviewe

Measurement of prompt open-charm production cross sections in proton-proton collisions at root s=13 TeV

The production cross sections for prompt open-charm mesons in proton-proton collisions at a center-of-mass energy of 13TeV are reported. The measurement is performed using a data sample collected by the CMS experiment corresponding to an integrated luminosity of 29 nb(-1). The differential production cross sections of the D*(+/-), D-+/-, and D-0 ((D) over bar (0)) mesons are presented in ranges of transverse momentum and pseudorapidity 4 < p(T) < 100 GeV and vertical bar eta vertical bar < 2.1, respectively. The results are compared to several theoretical calculations and to previous measurements.Peer reviewe

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

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