Department of Food Science and Technology, Federal Rural University of Rio de Janeiro, Brazil.
Department of Agribusiness Engineering, Federal Fluminense University (UFF), Brazil.
Food Sci Technol Int. 2021 Jun;27(4):301-312. doi: 10.1177/1082013220953238. Epub 2020 Sep 9.
Active cellulose acetate films incorporated with oregano essential oil (antimicrobial film) were previously subjected to high hydrostatic pressure treatment (300 MPa/5 min (FHP1) or 400 MPa/10 min (FHP2)) and investigated for possible changes in their antimicrobial efficiency. In parallel, the efficiency of the antimicrobial films, high hydrostatic pressure (300 MPa/5 min or 400 MPa/10 min), or a combination of antimicrobial film and high hydrostatic pressure, was tested on coalho cheese, experimentally contaminated with Listeria monocytogenes, Escherichia coli, and Staphylococcus aureus, stored for 21 days under refrigeration. Investigations in cheese samples, the combination of antimicrobial film and 400 MPa/10 min caused greater reductions in counts for the three microorganisms, at zero time throughout the entire coalho cheese storage. Only antimicrobial film or combination (antimicrobial film and high hydrostatic pressure) were able to control microbial multiplication during the 21 days. Therefore, the results confirm that the individual use of high hydrostatic pressure (300 MPa/5 min or 400 MPa/10 min) at the level evaluated can allow bacterial multiplication during storage and that the combination of antimicrobial packaging and high hydrostatic pressure has greater potential to ensure a safer coalho cheese.
先前，我们将添加了牛至精油（具有抗菌功能的薄膜）的活性醋酸纤维素薄膜进行了超高压处理（300 MPa/5 min（FHP1）或 400 MPa/10 min（FHP2）），并对其抗菌效率的可能变化进行了研究。同时，我们还测试了抗菌薄膜、超高压（300 MPa/5 min 或 400 MPa/10 min）或抗菌薄膜和超高压的组合对受李斯特菌、大肠杆菌和金黄色葡萄球菌污染的煤球奶酪的抗菌效率，将其在冷藏条件下储存 21 天。研究结果表明，在整个煤球奶酪储存期间的零时间点，组合使用抗菌薄膜和 400 MPa/10 min 可最大程度地减少这三种微生物的数量。仅使用抗菌薄膜或组合（抗菌薄膜和超高压）可以在 21 天内控制微生物的繁殖。因此，结果证实了在评估的水平下单独使用超高压（300 MPa/5 min 或 400 MPa/10 min）可以允许细菌在储存过程中繁殖，而抗菌包装和超高压的组合具有更大的潜力来确保煤球奶酪的安全性。
