Monteiro Shênia Santos, Dos Anjos Antônia Isabelly Monteiro, de Sousa Anna Clara Batista, da Silva Mikaelly Batista, Monteiro Shirley Santos, Moreira Pereira Emmanuel, Almeida Renata Duarte, de Bittencourt Pasquali Matheus Augusto
Federal University of Campina Grande, Graduate Program in Engineering and Natural Resources Management, Campina Grande, 58429-900, Brazil.
Federal University of Campina Grande, Graduate Program in Food Engineering, Campina Grande 58429-900, Brazil.
Food Chem. 2025 Oct 1;488:144849. doi: 10.1016/j.foodchem.2025.144849. Epub 2025 May 20.
This study evaluated a coating based on Opuntia cochenillifera mucilage fermented with Lactobacillus gasseri and starch (MOCF-S) to extend the shelf life of minimally processed melons under refrigeration. The films were characterized according to thickness, solubility, water vapor permeability, optical properties, morphology, Fourier transform infrared spectroscopy (FTIR), and thermal and mechanical properties. The MOCF-S film showed high solubility (96.43 %), greater water vapor permeability (6.13 g/kPa h m), and a smooth and uniform surface, suggesting compatibility between fermented mucilage and starch. It also demonstrated greater tensile strength and the presence of amide I bands in FTIR, indicating structural interactions. Antimicrobial activity was detected in the contact area against Escherichia coli (6.7 to 7.3 mm) and Staphylococcus aureus (6.7 to 7.7 mm). After 12 days at 5 °C, the coated fruits maintained better titratable acidity and antioxidant compounds compared to the control, demonstrating the potential of the MOCF-S film in postharvest conservation.
本研究评估了一种基于用加氏乳杆菌发酵的仙人掌胭脂虫黏液和淀粉（MOCF-S）的涂层，以延长冷藏条件下最少加工甜瓜的货架期。根据厚度、溶解性、水蒸气透过率、光学性能、形态、傅里叶变换红外光谱（FTIR）以及热性能和机械性能对薄膜进行了表征。MOCF-S薄膜显示出高溶解性（96.43%）、更高的水蒸气透过率（6.13 g/kPa·h·m）以及光滑均匀的表面，表明发酵黏液与淀粉之间具有相容性。它还表现出更高的拉伸强度，并且在FTIR中存在酰胺I带，表明存在结构相互作用。在接触区域检测到对大肠杆菌（6.7至7.3毫米）和金黄色葡萄球菌（6.7至7.7毫米）的抗菌活性。在5℃下放置12天后，与对照相比，涂覆的果实保持了更好的可滴定酸度和抗氧化化合物，证明了MOCF-S薄膜在采后保鲜方面的潜力。
