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High-molecular-weight fibroin as a preservation coating for perishable fruits
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Scientists created a natural coating made from silk protein and edible alcohol that keeps fruits like jujubes and avocados fresh longer, without relying on plastic packaging. This matters because most produce today is wrapped in plastic to prevent spoilage, and plastics can shed microplastics that end up in our food and bodies, so a silk-based alternative could help cut down on that exposure while still keeping fruit fresh and reducing food waste.
Fresh fruits and vegetables are prone to spoilage during storage. To prolong the shelf life of perishable produce, various preservation technologies, such as plastic packaging, are widely used; however, many contribute to environmental pollution and food safety concerns. This study developed a simple and scalable coating solution based on high-molecular-weight (MW) fibroin for preserving fresh fruits. Specifically, the lightly-degraded silk protein was blended with edible alcohol to prepare the preservation coating solution. The incorporation of a moderate ethanol concentration (15%) not only promoted structural transition of fibroin into a β-conformation and enhanced preservation efficacy, but also eliminated the need for additional annealing steps and lowered production costs. The resulting coating film exhibits excellent mechanical strength and optimal barrier properties, effectively delaying decay while significantly extending the shelf lives of winter jujube and avocado. This protein-based, potentially eco-friendly coating strategy demonstrates promising economic prospects for post-harvest preservation and sustainable agricultural practices.
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This review summarizes research on using tightly-folded protein fibers to create food packaging that could replace plastic. These protein-based films keep food fresher longer and break down naturally, potentially reducing microplastic pollution, though scientists still need to confirm they're safe for long-term use before they hit store shelves.
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This review summarizes research on making food packaging from farm leftovers like fruit peels and husks, instead of plastic. These materials can be formed into edible coatings or films that may help keep fruits and vegetables fresh longer, though challenges remain around cost, safety testing, and large-scale production.
High-barrier and antioxidant lignin-reinforced starch nanofiber films for fruit preservation
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Scientists created a food wrapping film from plant materials (starch and ligno, a woody plant compound) instead of plastic, and it kept cherry tomatoes fresh 50% longer than regular packaging. The film blocks moisture and oxygen, fights bacteria, and has antioxidant properties, all while offering a biodegradable alternative to plastic packaging, which sheds microplastics into our food and environment as it breaks down. This research is still early-stage, but it points toward packaging that protects both your produce and your health.
A Biodegradable Bamboo-Based Foam as a Cleaner Alternative to Petroleum-Based Cushioning Materials for Sustainable Fruit Packaging
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Scientists created a new packaging foam made from bamboo that works just as well as plastic foam for protecting fruit during shipping, but completely breaks down in compost instead of creating lasting waste. This matters because traditional plastic packaging foams don't decompose and break into tiny pieces called microplastics that can end up in our food and water. The bamboo foam could help reduce our exposure to these harmful plastic particles while still keeping our food safe during transport.
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