Effects of natural antioxidants in processing and stability of italian type salami during storage / Efeitos de antioxidantes naturais no processamento e estabilidade do salame italiano durante o armazenamento

The aim of the study was to elaborate formulations of Italian type salami by adding natural antioxidant of green tea (Camellia sinensis) and to evaluate the stability during the shelf life. Formulations (F1, F2 and F3) were elaborated varying the concentrations of green tea (0.008 to 0.016%), sodium erythorbate (0.048 to 0.097%), sodium nitrite (0 to 0.012%), sodium nitrate (0 to 0.016%), curing salt (0 to 0.189%) and dehydrated glucose (0.589 to 0.959%), keeping fixed the concentrations of swine meat, bacon, water, refined salt, pepper and starter culture. To verify oxidative stability, the moisture, water activity, sodium nitrate and nitrite, pH, acidity, TBARS and product acceptance were evaluated during 120 days of storage. F1 stood out in terms of acceptance, with a higher initial and residual concentration of nitrates and nitrites up to the 80th day of storage and less lipid oxidation, that has 0.016% green tea, 0.012% sodium nitrite, 0.013% sodium nitrate, 0.081% sodium erythorbate and 0.806% dehydrated glucose in its formulation. The results indicated that the addition of green tea, associated with sodium nitrate/nitrite and sodium erythorbate reduced the formation of TBARS and did not affect the sensory quality of the product. Thus, this natural antioxidant can be easily used in Salami to improve quality and provide safer products. 

Measurements of Z-boson resonance parameters in e+e- annihilation

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Studies of jet production rates in e + e − annihilation at E cm =29 GeV

Production rates of multijet hadronic final states are studied in e + e − annihilation at 29 GeV center of mass energy. QCD shower model calculations with exact first order matrix element weighting at the first gluon vertex are capable of reproducing the observed multijet event rates over a large range of jet pair masses. The method used to reconstruct jets is well suited for directly comparing experimental jet rates with parton rates calculated in perturbative QCD. Evidence for the energy dependene of α s is obtained by comparing the observed production rates of 3-jet events with results of similar studies performed at higher center of mass energies.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/47886/1/10052_2005_Article_BF01506527.pd

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We have observed hadronic final states produced in the decays of Z bosons. In order to study the parton structure of these events, we compare the distributions in sphericity, thurst, aplanarity, and number of jets to the predictions of several QCD-based models and to data from lower energies. The data and models agree within the present statistical precision

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