Díaz-Mula Huertas M, López Juan P, Serrano María, Pretel María T
Department of Biología Aplicada, Escuela Politécnica Superior de Orihuela (EPSO), Universidad Miguel Hernández, Carretera Beniel-Orihuela, Km 3.2, 03312 Orihuela, Alicante, Spain.
Instituto Universitario de Investigación e Innovación Agroalimentaria y Agroambiental (CIAGRO), Universidad Miguel Hernández, Carretera Beniel-Orihuela, Km 3.2, 03312 Orihuela, Alicante, Spain.
Foods. 2023 Oct 30;12(21):3977. doi: 10.3390/foods12213977.
Ready-to-eat fresh fruit have an increasing presence in international markets due to their convenience and health benefits. However, these products are highly perishable and efficient technologies to increase their shelf life are needed. In the present research, different citrus fruit species and cultivars from organic farming were assessed to obtain enzymatically peeled citrus segments. The best results in terms of segment quality were observed for 'Hernandina' clementine, which was chosen to make a new ready-to-eat product based on peeled citrus segments that were packaged in glass jars with a light syrup made of citrus juice and organic sugar cane. Different citrus juice mixtures were assayed and the most appreciated syrup, based on the sensory scores given by panellists, was that containing 50-50 (/) of 'Fino' lemon and 'Hernandina' clementine juices. In addition, different pasteurization treatments were assessed for their effects on conserving the safety, nutritional quality and sensory properties of the product during cold storage. The results show that pasteurization treatment at 50 °C for 45 min was sufficient to prevent microbial contamination with mesophilic and psychrophilic aerobic bacteria or yeast and mould and to maintain sensory properties until five weeks of storage at 4 °C. In addition, only a 10% reduction in vitamin C concentrations was observed in fresh-segments or syrup until the end of the storage period, showing that a high bioactive compound content and health benefits were conserved in the new ready-to-eat product after pasteurization and prolonged cold storage.
即食新鲜水果因其便利性和健康益处而在国际市场上的占有率日益提高。然而,这些产品极易腐烂,因此需要高效技术来延长其保质期。在本研究中,对来自有机农场的不同柑橘类水果品种进行了评估,以获取酶法去皮的柑橘瓣。就瓣的品质而言,‘埃尔南迪纳’克莱门氏小柑橘取得了最佳结果,该品种被选用于制作一种新的即食产品,其原料为去皮柑橘瓣,包装在玻璃罐中,并添加由柑橘汁和有机甘蔗制成的淡糖浆。对不同的柑橘汁混合物进行了测试,根据评审员给出的感官评分,最受欢迎的糖浆是含有50-50(/)比例的‘菲诺’柠檬汁和‘埃尔南迪纳’克莱门氏小柑橘汁的混合物。此外,还评估了不同的巴氏杀菌处理对产品在冷藏期间安全性、营养品质和感官特性保存的影响。结果表明,50℃下45分钟的巴氏杀菌处理足以防止嗜温和好氧嗜冷细菌、酵母和霉菌的微生物污染,并在4℃下储存五周内保持感官特性。此外,在储存期结束前,新鲜瓣或糖浆中的维生素C浓度仅降低了10%,这表明在巴氏杀菌和长时间冷藏后,新的即食产品中仍保留了较高的生物活性化合物含量和健康益处。