Materials Science · Biomaterials
Researchers developed a food-packaging aerogel containing Rosa canina fruit extract and magnesium oxide-doped carbon dots. It changed color from light khaki to dark violet while monitoring refrigerated raw beef for five days, suggesting a visible way to track freshness.
Researchers report that a biodegradable plastic film containing 10% cetyltrimethylammonium bromide could be depolymerized in a dilute sodium hydroxide solution. Microwave heating reduced the treatment time from six hours to two minutes, producing lactic acid and sodium lactate; activated carbon removed residual cetyltrimethylammonium bromide afterward.
Researchers made biodegradable films from pectin, glycerol, and purple sweet-potato color that respond to pH changes. The color shift was sensitive and the films could be used to monitor shrimp freshness, based on changes linked to shrimp quality indicators.
