Reducing spoilage and indicator bacteria is important for microbiological stability inmeat and meat products. The
objectivewas to evaluate the effect of different doses of gamma radiation on the shelf-life of lamb meat, vacuum packed
and stored under refrigeration, by assessing the microbiological safety, physicochemical stability and sensory quality. Lamb loin cuts (Longissimus dorsi) were irradiatedwith 1.5 kGy and 3.0 kGy. The samples, including control, were stored at 1 ± 1 °C during 56 days. Samples were analyzed on zero, 14, 28, 42 and 56 days by their microbiological and physicochemical characteristics. Sensory quality was carried out on day zero. The results showed a reduction (p b 0.05) in the microbial load of the irradiated samples. The acceptance of lamb loins was not affected (p N 0.05) by the radiation doses. Thus gamma irradiation at 3.0 kGy was effective in reducing
the content of microorganisms, without harming the physicochemical characteristics evaluated.
Reducing spoilage and indicator bacteria is important for microbiological stability inmeat and meat products. Theobjectivewas to evaluate the effect of different doses of gamma radiation on the shelf-life of lamb meat, vacuum packedand stored under refrigeration, by assessing the microbiological safety, physicochemical stability and sensory quality. Lamb loin cuts (Longissimus dorsi) were irradiatedwith 1.5 kGy and 3.0 kGy. The samples, including control, were stored at 1 ± 1 °C during 56 days. Samples were analyzed on zero, 14, 28, 42 and 56 days by their microbiological and physicochemical characteristics. Sensory quality was carried out on day zero. The results showed a reduction (p b 0.05) in the microbial load of the irradiated samples. The acceptance of lamb loins was not affected (p N 0.05) by the radiation doses. Thus gamma irradiation at 3.0 kGy was effective in reducingthe content of microorganisms, without harming the physicochemical characteristics evaluated.
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