Projeto e validação de máquina para produção de extrato de amendoim

O extrato de amendoim (leite de amendoim) tem, por finalidade, levar à população uma bebida rica em proteína vegetal. Para sua produção desenvolveu-se uma máquina compacta, funcional e de fácil uso, composta pelos sistemas de alimentação, trituração e acionamento, além de uma base de sustentação. O equipamento desenvolvido foi projetado, avaliado e validado em laboratório, considerando-se: o tempo de processamento do produto e o resíduo produzido; rendimento da máquina e resíduo produzido utilizando-se duas peneiras distintas (1,5 e 0,42 mm); densidade, através de um densímetro e numa relação massa/volume; custo aproximado de sua produção considerando-se o custo do grão, da água mineral e da energia elétrica. Em laboratório a máquina apresentou um tempo de produção de 110,58 e 98,45 s para as Técnicas 1 e 2, respectivamente; densidade média de 0,99 g mL-1; rendimento de 2000 mL para a peneira 1 e 1726 mL para a peneira 2 e custo final de R$1,78 para a Técnica 1 e R$ 1,50 para a Técnica 2

Estabilidade física e química de licores de graviola durante o armazenamento em condições ambientais

Objetivou-se, neste trabalho, desenvolver e avaliar a estabilidade de licores de graviola acondicionados em embalagens de polietileno durante o armazenamento por 240 dias em condi&#231;&#245;es ambientais. Foram elaboradas 5 formula&#231;&#245;es de licores variando-se as concentra&#231;&#245;es de polpa (300, 400 e 500 g) e xarope de sacarose (50, 60 e 70 &#176;Brix). As polpas foram maceradas em &#225;lcool comercial por 20 dias; em seguida, as misturas foram filtradas, adicionadas de xarope e submetidas a um envelhecimento acelerado em banho-maria, a 60 &#176;C, pelo per&#237;odo de 2 h. Os licores foram acondicionados em embalagens de polietileno de baixa densidade e armazenados em temperatura e umidade relativa m&#233;dias de 26 &#176;C e 78%, respectivamente. No tempo inicial e a cada 60 dias de estocagem, por 240 dias, os licores foram submetidos &#224;s an&#225;lises de teor alco&#243;lico, a&#231;&#250;cares totais, s&#243;lidos sol&#250;veis totais (SST), acidez total titul&#225;vel (ATT), raz&#227;o SST/ATT, pH, atividade de &#225;gua e cor (L*, a* e b*). Observou-se que o armazenamento promoveu aumentos significativos (p < 0,05) nos valores de a&#231;&#250;cares totais, SST e cromaticidades a* e b*. Os par&#226;metros de teor alco&#243;lico, atividade de &#225;gua, pH e luminosidade (L*) foram reduzidos enquanto que a ATT e a raz&#227;o SST/ATT permaneceram est&#225;veis ao final da estocagem

Storage of ‘umbu-cajá’ pulp powder produced by lyophilization

ABSTRACT This work aimed to study the chemical and physical stability of ‘umbu-cajá’ powders produced by lyophilization during storage. ‘Umbu-cajá’ pulps formulated with different concentrations of gum arabic (10, 20 and 30%), previously frozen, were dehydrated in benchtop lyophilizer at -40 °C for 48 h and disintegrated to obtain the powder, which was stored in laminated packages for 180 days at ambient conditions, with physical, chemical and physico-chemical analyzes performed at the beginning and every 30 days of storage. According to the results, all investigated parameters were significantly altered throughout the storage, yet with less intense variations for important variables, such as ascorbic acid, reducing sugars and titratable acidity. At the end of storage, all powders were microbiologically safe

Study of the Λ–Λ interaction with femtoscopy correlations in pp and p–Pb collisions at the LHC

This work presents new constraints on the existence and the binding energy of a possible – bound state, the H-dibaryon, derived from – femtoscopic measurements by the ALICE collaboration. The results are obtained from a new measurement using the femtoscopy technique in pp collisions at √s = 13 TeV and p–Pb collisions at √sNN = 5.02 TeV, combined with previously published results from pp collisions at √s = 7 TeV. The – scattering parameter space, spanned by the inverse scattering length f −1 0 and the effective range d0, is constrained by comparing the measured – correlation function with calculations obtained within the Lednický model. The data are compatible with hypernuclei results and lattice computations, both predicting a shallow attractive interaction, and permit to test different theoretical approaches describing the – interaction. The region in the (f −1 0 ,d0) plane which would accommodate a – bound state is substantially restricted compared to previous studies. The binding energy of the possible – bound state is estimated within an effective-range expansion approach and is found to be B = 3.2+1.6 −2.4(stat)+1.8 −1.0(syst) MeV

HΛ3 and H‾Λ‾3 lifetime measurement in Pb–Pb collisions at √sNN=5.02 TeV via two-body decay

An improved value for the lifetime of the (anti-)hypertriton has been obtained using the data sample of Pb–Pb collisions at √sNN = 5.02 TeV collected by the ALICE experiment at the LHC. The (anti-)hypertriton has been reconstructed via its charged two-body mesonic decay channel and the lifetime has been determined from an exponential fit to the dN/d(ct) spectrum. The measured value, τ = 242+34 −38 (stat.) ± 17 (syst.) ps, is compatible with representative theoretical predictions, thus contributing to the solution of the longstanding hypertriton lifetime puzzle

Measuring KS0K± interactions using Pb–Pb collisions at √sNN=2.76 TeV

We present the first ever measurements of femtoscopic correlations between the K0 S and K± particles. The analysis was performed on the data from Pb–Pb collisions at √sNN = 2.76 TeV measured by the ALICE experiment. The observed femtoscopic correlations are consistent with final-state interactions proceeding via the a0(980) resonance. The extracted kaon source radius and correlation strength parameters for K0 SK− are found to be equal within the experimental uncertainties to those for K0 SK+. Comparing the results of the present study with those from published identical-kaon femtoscopic studies by ALICE, mass and coupling parameters for the a0 resonance are tested. Our results are also compatible with the interpretation of the a0 having a tetraquark structure instead of that of a diquar

Multiplicity dependence of K*(892)0 and ϕ(1020) production in pp collisions at t √s=13 TeV

The striking similarities that have been observed between high-multiplicity proton-proton (pp) collisions and heavy-ion collisions can be explored through multiplicity-differential measurements of identified hadrons in pp collisions. With these measurements, it is possible to study mechanisms such as collective flow that determine the shapes of hadron transverse momentum (pT) spectra, to search for possible modifications of the yields of short-lived hadronic resonances due to scattering effects in an extended hadron-gas phase, and to investigate different explanations provided by phenomenological models for enhancement of strangeness production with increasing multiplicity. In this paper, these topics are addressed through measurements of the K∗(892)0 and φ(1020) mesons at midrapidity in pp collisions at √s = 13 TeV as a function of the charged-particle multiplicity. The results include the pT spectra, pT-integrated yields, mean transverse momenta, and the ratios of the yields of these resonances to those of longer-lived hadrons. Comparisons with results from other collision systems and energies, as well as predictions from phenomenological models, are also discussed

Multiplicity dependence of inclusive J/ψ production at midrapidity in pp collisions at √s=13 TeV

Measurements of the inclusive J/ψ yield as a function of charged-particle pseudorapidity density dNch/dη in pp collisions at √s = 13 TeV with ALICE at the LHC are reported. The J/ψ meson yield is measured at midrapidity (|y| < 0.9) in the dielectron channel, for events selected based on the charged-particle multiplicity at midrapidity (|η| < 1) and at forward rapidity (−3.7 < η < −1.7 and 2.8 < η < 5.1); both observables are normalized to their corresponding averages in minimum bias events. The increase of the normalized J/ψ yield with normalized dNch/dη is significantly stronger than linear and dependent on the transverse momentum. The data are compared to theoretical predictions, which describe the observed trends well, albeit not always quantitatively