This study aims at evaluating the effect of a phenol-rich extract obtained from the concentration and purification of olive mill wastewaters (added at a ratio of 87.5 and 175 mg of phenols/kg meat) on the stability and sensory quality of beef hamburgers packed under modified atmosphere and stored under alternating exposure to fluores-cent light at 4±2°C for 9 days. Hamburgers were sampled at different times (0, 6 and 9 days) and grilled at 200°C. After 9 days, more than 56% of the added phenols in the raw burgers and more than 20% the grilled ones, were retained. The results show that both concentrations of phenolic extract proved to effectively reduce primary and sec-ondary lipid oxidation, as well as cholesterol oxidation products (COPs), during the shelf-life of raw hamburgers. Peroxide value, thiobarbituric acid reactive substances and total COPs were up to 1.4-, 4.5- and 8.8-fold lower in phenol-enriched raw ham-burgers, respectively, than in control samples; a similar trend was noted also in phe-nol-enriched cooked hamburgers (1.3-, 5.7- and 4-fold lower). Sensory analysis also confirmed the effectiveness of the addition of phenolic extract, having a positive effect on the red color intensity (raw product) and thus reducing browning during storage.
Improved oxidative stability and sensory quality of beef hamburgers enriched with a phenolic extract from olive vegetation water / S. Barbieri; D. Mercatante; S. Balzan; S. Esposto; V. Cardenia; M. Servili; E. Novelli; A. Taticchi; M. T. Rodriguez-Estrada. - In: ANTIOXIDANTS. - ISSN 2076-3921. - ELETTRONICO. - 10:12(2021), pp. 1969.1-1969.22. [10.3390/antiox10121969]
Improved oxidative stability and sensory quality of beef hamburgers enriched with a phenolic extract from olive vegetation water
S. Barbieri;D. Mercatante;M. T. Rodriguez-Estrada
2021
Abstract
This study aims at evaluating the effect of a phenol-rich extract obtained from the concentration and purification of olive mill wastewaters (added at a ratio of 87.5 and 175 mg of phenols/kg meat) on the stability and sensory quality of beef hamburgers packed under modified atmosphere and stored under alternating exposure to fluores-cent light at 4±2°C for 9 days. Hamburgers were sampled at different times (0, 6 and 9 days) and grilled at 200°C. After 9 days, more than 56% of the added phenols in the raw burgers and more than 20% the grilled ones, were retained. The results show that both concentrations of phenolic extract proved to effectively reduce primary and sec-ondary lipid oxidation, as well as cholesterol oxidation products (COPs), during the shelf-life of raw hamburgers. Peroxide value, thiobarbituric acid reactive substances and total COPs were up to 1.4-, 4.5- and 8.8-fold lower in phenol-enriched raw ham-burgers, respectively, than in control samples; a similar trend was noted also in phe-nol-enriched cooked hamburgers (1.3-, 5.7- and 4-fold lower). Sensory analysis also confirmed the effectiveness of the addition of phenolic extract, having a positive effect on the red color intensity (raw product) and thus reducing browning during storage.File | Dimensione | Formato | |
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