de Sousa Guedes Jossana Pereira, da Costa Medeiros José Alberto, de Souza E Silva Richard Sidney, de Sousa Janaína Maria Batista, da Conceição Maria Lúcia, de Souza Evandro Leite
Laboratory of Food Microbiology, Department of Nutrition, Health Science Center, Federal University of Paraíba, João Pessoa, Brazil.
Laboratory of Food Microbiology, Department of Nutrition, Health Science Center, Federal University of Paraíba, João Pessoa, Brazil.
Int J Food Microbiol. 2016 Dec 5;238:183-192. doi: 10.1016/j.ijfoodmicro.2016.09.005. Epub 2016 Sep 13.
This study evaluated the ability of the essential oil from Mentha arvensis L. (MAEO) and M. piperita L. (MPEO) to induce ≥5-log reductions in counts (CFU/mL) of E. coli, L. monocytogenes, and Salmonella enterica serovar Enteritidis in Brain-Heart Infusion broth (BHIB) and cashew, guava, mango, and pineapple juices during refrigerated storage (4±0.5°C). The effects of the incorporation of these essential oils on some physicochemical and sensory parameters of juices were also evaluated. The incorporation of 5, 2.5, 1.25, or 0.625μL/mL of MAEO in BHIB caused a ≥5-log reduction in counts of E. coli and Salmonella Enteritidis after 24h of storage; but only 5μL/mL was able to cause the same reduction in counts of L.monocytogenes. The incorporation of 10μL/mL of MPEO in BHIB caused a ≥5-log reduction in counts of E. coli, Salmonella Enteritidis, and L. monocytogenes after 24h of storage; smaller reductions were observed in BHIB containing 5, 2.5, and 1.25μL/mL of MPEO. Similar reductions were observed when the MAEO or MPEO was incorporated at the same concentrations in mango juice. The incorporation of MAEO or MPEO at all tested concentrations in cashew, guava, and pineapple juices resulted in a ≥5-log reduction in pathogen counts within 1h. The incorporation of MAEO and MPEO (0.625 and 1.25μL/mL, respectively) in fruit juices did not induce alterations in °Brix, pH, and acidity, but negatively affected the taste, aftertaste, and overall acceptance. The use of MAEO or MPEO at low concentrations could constitute an interesting tool to achieve the required 5-log reduction of pathogenic bacteria in cashew, guava, mango, and pineapple fruit juices. However, new methods combining the use of MAEO or MPEO with other technologies are necessary to reduce their negative impacts on specific sensory properties of these juices.
本研究评估了薄荷(Mentha arvensis L.,MAEO)和胡椒薄荷(M. piperita L.,MPEO)精油在冷藏储存(4±0.5°C)期间,使脑心浸液肉汤(BHIB)以及腰果、番石榴、芒果和菠萝汁中的大肠杆菌、单核细胞增生李斯特菌和肠炎沙门氏菌肠炎血清型的菌数(CFU/mL)减少≥5个对数级的能力。还评估了添加这些精油对果汁某些理化和感官参数的影响。在BHIB中添加5、2.5、1.25或0.625μL/mL的MAEO,储存24小时后,大肠杆菌和肠炎沙门氏菌的菌数减少了≥5个对数级;但只有5μL/mL能够使单核细胞增生李斯特菌的菌数减少相同程度。在BHIB中添加10μL/mL的MPEO,储存24小时后,大肠杆菌、肠炎沙门氏菌和单核细胞增生李斯特菌的菌数减少了≥5个对数级;在含有5、2.5和1.25μL/mL MPEO的BHIB中观察到的菌数减少幅度较小。当MAEO或MPEO以相同浓度添加到芒果汁中时,也观察到了类似的菌数减少情况。在腰果、番石榴和菠萝汁中添加所有测试浓度的MAEO或MPEO,在1小时内病原菌数量减少了≥5个对数级。在果汁中添加MAEO和MPEO(分别为0.625和1.25μL/mL)不会引起糖度、pH值和酸度的变化,但会对口感、余味和总体接受度产生负面影响。低浓度使用MAEO或MPEO可能是实现腰果、番石榴、芒果和菠萝果汁中病原菌所需的5个对数级减少的一种有趣工具。然而,需要新的方法将MAEO或MPEO的使用与其他技术相结合,以减少它们对这些果汁特定感官特性的负面影响。