Análisis fisicoquímico y proteínico de la pasta de chapulín (Sphenarium purpurascens Charpentier)

Objective: Make grasshopper paste (Gp) and incorporate it into Mole Poblano (MP), evaluating the physicochemical characteristics and protein content of this mixture. Design / methodology / approach: Grasshoppers were collected and Gp was prepared. Later, the Gp was included in the Mole Poblano paste (MP) in the following treatments: T0 = 0Gp and 100% MP, T10 = 10% Gp and 90% MP, T15 = 15% Gp and 85% MP, T20 = 20 % Gp and 80% MP, T25 = 25% Gp and 75% MP and T30 = 30% Gp and 70% MP. The treatments were subjected to physical-chemical analysis and protein content. Findings / conclusion: Treatments T0 and T10 had the highest L *. the variable ?E was clearer for T0 and was different among all the other treatments. The C * saturation index decreased between treatments. Protein content increased with the inclusion of Gp. There were no differences between treatments in pH and water activity. It is concluded that the Gp can be incorporated into the MP to improve its nutritional value and there is no drastic change in the physicochemical variables of the evaluated treatments.Objetivo: Preparar pasta de chapulín (Pch) e incorporarla al mole poblano (MP), evaluando las características fisicoquímicas y el contenido proteínico del preparado. Diseño/metodología/aproximación: Se colectaron chapulines y se preparó Pch. Posteriormente la harina se incluyó en la pasta de MP en los siguientes tratamientos: T0= 0Ch y 100% MP, T10= 10% Pch y 90% MP, T15= 15% Pch y 85% MP, T20= 20% Pch y 80% MP, T25= 25% Pch y 75% MP y T30= 30% Pch y 70% MP. A los tratamientos se le realizó los análisis físicoquímicos y contenido de proteína.  Hallazgos/conclusión: Los tratamientos T0 y T10 tuvieron la mayor L*. la variable ?E fue más claro para T0 y fue diferente entre todos los demás tratamientos. El índice de saturación C* descendió entre los tratamientos. El contenido de proteína incrementó con la inclusión de la Pch. No hubo diferencias entre los tratamientos en el pH y la actividad de agua. Se concluye que la Pch se puede incorporar al MP para mejorar su valor nutricional y no existe un cambio drástico en las variables fisicoquímicas de los tratamientos evaluados

Evaluación sensorial de ate hecho con pectina de cáscara de naranja

Objetivo: El objetivo de este trabajo fue evaluar la calidad sensorial de un ate hecho con pectina de cáscara de naranja comparado con uno elaborado con pectina industrial (control), con la finalidad de dar una alternativa de uso de este biopolímero en un alimento artesanal mexicano. Diseño/metodología/aproximación: Se realizó la extracción de pectina de la cáscara de naranja. Se elaboraron muestras de ate control y otra elaborada con pectina de naranja; se evaluaron características físicas y sensoriales. Resultados: No hubo diferencias en color, ni en la percepción sensorial de sabor, color y textura del ate hecho de pectina de cáscara de naranja y aquel elaborado con pectina industrial. Sin embargo, el ate de pectina de cáscara de naranja mostró mayor adhesividad y fue más frágil que el control. Limitaciones del estudio/implicaciones:  Se requieren más estudios del efecto de adición de la pectina extraída de la cáscara de naranja para mejorar la textura del ate. Hallazgos/conclusiones: Los resultados mostraron que la pectina de cáscara de naranja puede utilizarse en la elaboración del ate

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

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

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

Measurements of Higgs boson production cross sections and couplings in the diphoton decay channel at root s=13 TeV

Measurements of Higgs boson production cross sections and couplings in events where the Higgs boson decays into a pair of photons are reported. Events are selected from a sample of proton-proton collisions at root s = 13TeV collected by the CMS detector at the LHC from 2016 to 2018, corresponding to an integrated luminosity of 137 fb(-1). Analysis categories enriched in Higgs boson events produced via gluon fusion, vector boson fusion, vector boson associated production, and production associated with top quarks are constructed. The total Higgs boson signal strength, relative to the standard model (SM) prediction, is measured to be 1.12 +/- 0.09. Other properties of the Higgs boson are measured, including SM signal strength modifiers, production cross sections, and its couplings to other particles. These include the most precise measurements of gluon fusion and vector boson fusion Higgs boson production in several different kinematic regions, the first measurement of Higgs boson production in association with a top quark pair in five regions of the Higgs boson transverse momentum, and an upper limit on the rate of Higgs boson production in association with a single top quark. All results are found to be in agreement with the SM expectations.Peer reviewe

Observation of tW production in the single-lepton channel in pp collisions at root s=13 TeV

A measurement of the cross section of the associated production of a single top quark and a W boson in final states with a muon or electron and jets in proton-proton collisions at root s = 13 TeV is presented. The data correspond to an integrated luminosity of 36 fb(-1) collected with the CMS detector at the CERN LHC in 2016. A boosted decision tree is used to separate the tW signal from the dominant t (t) over bar background, whilst the subleading W+jets and multijet backgrounds are constrained using data-based estimates. This result is the first observation of the tW process in final states containing a muon or electron and jets, with a significance exceeding 5 standard deviations. The cross section is determined to be 89 +/- 4 (stat) +/- 12 (syst) pb, consistent with the standard model.Peer reviewe

Measurements of the Electroweak Diboson Production Cross Sections in Proton-Proton Collisions at root s=5.02 TeV Using Leptonic Decays

The first measurements of diboson production cross sections in proton-proton interactions at a center-of-mass energy of 5.02 TeV are reported. They are based on data collected with the CMS detector at the LHC, corresponding to an integrated luminosity of 302 pb(-1). Events with two, three, or four charged light leptons (electrons or muons) in the final state are analyzed. The WW, WZ, and ZZ total cross sections are measured as sigma(WW) = 37:0(-5.2)(+5.5) (stat)(-2.6)(+2.7) (syst) pb, sigma(WZ) = 6.4(-2.1)(+2.5) (stat)(-0.3)(+0.5)(syst) pb, and sigma(ZZ) = 5.3(-2.1)(+2.5)(stat)(-0.4)(+0.5) (syst) pb. All measurements are in good agreement with theoretical calculations at combined next-to-next-to-leading order quantum chromodynamics and next-to-leading order electroweak accuracy