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PublicaciónChemical Composition, Tocopherol and Carotenoid Content of Seeds from Different Andean Lupin (Lupinus mutabilis) Ecotypes(Springer, 2021)Andean lupin (Lupinus mutabilis) seeds are appreciated for their high protein and lipid contents and have potential applications as ingredients in food, cosmetic, and pharmaceutical industries. Nevertheless, the information about the seed composition (especially in lipophilic antioxidants) of ecotypes from distinct cropping areas is currently limited. Thus, the aim of the present research was to assess the morphological characteristics, chemical composition, tocopherol and carotenoid contents of the seeds of 33 Andean lupin ecotypes from different Peruvian regions, along with three L. albus, one L. angustifolius and one L. luteus controls. Significant differences were noted among the Andean ecotypes for all analyzed features. The protein, lipid and ash contents were 32.0–46.9, 13.6–18.6 and 2.7–4.4 g/100 g dry matter (DM), respectively. The seeds were rich in tocopherols (172.1–249.8 mg/kg DM; γ-tocopherol was 98% of total tocols) and low in carotenoids (0.69–2.89 mg/kg DM). Debittering increased the tocopherol content (227.0–378.2 mg/kg DM), probably because of the soluble components loss, although the carotenoid concentration remained unchanged. The Andean lupins had higher protein, lipid and tocopherol contents than L. albus and L. angustifolius; the L. luteus values were within the L. mutabilis range. These results suggest that L. mutabilis harbors nutritional characteristics that are well suited to modern food trends. © 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature.
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PublicaciónCharacterization of the gene sequence of the peptide transport protein (PepT1) in paiche Arapaima gigas fingerlings [Caracterización de la secuencia del gen de la proteín transportadora de péptidos (PepT1) en alevines de paiche Arapaima gigas](Universidad Nacional Mayor de San Marcos, 2019)The aim of this study was to characterize the PepT1 of pirarucu Arapaima gigas through genomic and proteomic tools. A transcriptomic and proteomic analysis was made from sections of the intestine, spleen, liver and kidney of fingerlings. The transcriptomic analysis allowed obtaining two consensus sequences of 357 and 459 bp. Both fragments showed a high degree of homology (78 and 80%), mainly with nucleotide sequences coding for the PepT1 of Scleropages formosus of the same Order as A. gigas. The proteomic analysis by double mass spectrometry MALDI TOF/TOF allowed to identify 15 peptide sequences of PepT1 in pirarucu. In conclusion, PepT1 was partially characterized in the intestine of pirarucu, which could be used for further studies on the evaluation of its expression. © 2019 Universidad Nacional Mayor de San Marcos. All rights reserved.
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PublicaciónMINERvA neutrino detector response measured with test beam data(Elsevier, 2015)The MINERvA collaboration operated a scaled-down replica of thesolid scintillator tracking and sampling calorimeter regions of the MINERvA detector in a hadron test beam at the Fermilab Test Beam Facility. This paper reports measurements with samples of protons, pions, and electrons from 0.35 to 2.0 GeV/c momentum. The calorimetric response to protons, pions, and electrons is obtained from these data. A measurement of the parameter in Birks' law and an estimate of the tracking efficiency are extracted from the proton sample. Overall the data are well described by a Geant4-based Monte Carlo simulation of the detector and particle interactions with agreements better than 4% for the calorimetric response, though some features of the data are not precisely modeled. These measurements are used to tune the MINERvA detector simulation and evaluate systematic uncertainties in support of the MINERvA neutrino crosssection measurement program.
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PublicaciónAntineutrino Charged-Current Reactions on Hydrocarbon with Low Momentum Transfer(American Physical Society, 2018)We report on multinucleon effects in low momentum transfer (< 0.8 GeV=c) antineutrino interactions on plastic (CH) scintillator. These data are from the 2010–2011 antineutrino phase of the MINERvA experiment at Fermilab. The hadronic energy spectrum of this inclusive sample is well described when a screening effect at a low energy transfer and a two-nucleon knockout process are added to a relativistic Fermi gas model of quasielastic, Δ resonance, and higher resonance processes. In this analysis, model elements introduced to describe previously published neutrino results have quantitatively similar benefits for this antineutrino sample. We present the results as a double-differential cross section to accelerate the investigation of alternate models for antineutrino scattering off nuclei.
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PublicaciónTuning the GENIE pion production model with MINERvA data(American Physical Society, 2019)Faced with unresolved tensions between neutrino interaction measurements at few-GeV neutrino energies, current experiments are forced to accept large systematic uncertainties to cover discrepancies between their data and model predictions. The widely used pion production model in genie is compared to four MINER𝜈A charged current pion production measurements using nuisance. Tunings, i.e., adjustments of model parameters, to help match genie to MINER𝜈A and older bubble chamber data are presented. We find that scattering off nuclear targets as measured in MINER𝜈A is not in good agreement with expectations based upon scattering off nucleon (hydrogen or deuterium) targets in existing bubble chamber data. An additional ad hoc correction for the low−𝑄2 region, where collective nuclear effects are expected to be large, is presented. While these tunings and corrections improve the agreement of genie with the data, the modeling is imperfect. The development of these tunings within the nuisance framework allows for straightforward extensions to other neutrino event generators and models, and allows omitting and including new datasets as they become available.