試題詳解

34.(AB) If the trend catches on, it could provide a template for creating more sustainable materials for the fashion world. (AC) While advancements in bacterially produced textiles hold promise for sustainability-conscious consumers and manufacturers alike, challenges remain in affordability. (AD) That means they are typically colored using traditional dyeing processes, which can use large amounts of water and release harsh chemicals into the environment. (AE) To find out, they genetically engineered a cellulose-producing bacterium, Komagataeibacter rhaeticus by adding a gene from another bacterium that produces black melanin pigment. (BC) For now, sustainability enthusiasts will have to wait for the other bacterially produced shoe to drop. (BD) It turned out that the culturing medium’s acidity hindered melanin production. (BE) Yet coloring or adding patterns to these bacterial textiles can still mean working with environmentally harmful dyes.