De Bruno Alessandra, Gattuso Antonio, Ritorto Davide, Piscopo Amalia, Poiana Marco
Department of AGRARIA, University Mediterranea of Reggio Calabria, 89124 Reggio Calabria, Italy.
Experimental Station for the Industry of the Essential Oils and Citrus Products SSEA, 89127 Reggio Calabria, Italy.
Foods. 2023 Jan 20;12(3):488. doi: 10.3390/foods12030488.
In this study, the effects of the application of edible coatings on the shelf life of the strawberry were evaluated, with the aim of extending the fruit's availability and shelf life while preserving its qualitative characteristics. In particular, the application of edible coatings enriched with a natural antioxidant to strawberries was evaluated for their physicochemical, microbial, and structural properties, during a storage period (up to 14 days) at refrigerated temperature. The experimental plan provided the formulation for edible coatings enriched with different concentrations of a natural antioxidant extract obtained from bergamot (Citrus bergamia Risso) pomace (1, 2.5, and 5%), bergamot essential oil (0.1% and 0.2% ), and a synthetic antioxidant, butylated hydroxytoluene (BHT, 100 ppm). Moreover, a control test with untreated strawberries was considered. The enriched gum Arabic coatings provided good results related to the preservation of the qualitative parameters of the strawberries. The samples coated with the antioxidant extract (2.5%, sample D) and bergamot essential oil (0.1%, sample F) showed the best maintenance of the qualitative parameters after 14 days, showing lower decay rates (36% D and 27% F), good acceptability by consumers (between 5 and 6), and good retention of ascorbic acid (>30 mg 100 g).
在本研究中，评估了可食用涂层对草莓保质期的影响，目的是在保持其品质特性的同时延长果实的供应期和保质期。具体而言，在冷藏温度下的储存期（长达14天）内，评估了富含天然抗氧化剂的可食用涂层对草莓的物理化学、微生物和结构特性的影响。实验方案提供了富含不同浓度天然抗氧化剂提取物的可食用涂层配方，这些提取物分别来自佛手柑（Citrus bergamia Risso）果渣（1%、2.5%和5%）、佛手柑精油（0.1%和0.2%）以及一种合成抗氧化剂丁基羟基甲苯（BHT，100 ppm）。此外，还考虑了对未处理草莓的对照试验。富含阿拉伯胶的涂层在保持草莓品质参数方面取得了良好效果。用抗氧化剂提取物（2.5%，样品D）和佛手柑精油（0.1%，样品F）涂层的样品在14天后显示出最佳的品质参数维持情况，腐烂率较低（样品D为36%，样品F为27%），消费者接受度良好（5至6之间），且抗坏血酸保留率良好（>30 mg/100 g）。
