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“预制菜”在今年深入人心,也成了等菜期间的话题。一锅浓汤鸡煲翅,软烂脱骨的整鸡当是提前熬煮;本地特产“土笋冻”,制作工序繁琐,需去除土笋内脏、反复清洗,熬煮至胶质析出,再分装冷却,待其凝固,自是无法现点现做。
But agar’s superior qualities come with complex chemistry. “To speak of agar as a single substance of certain (if known) chemical structure is probably a mistake,” wrote phycologist Harold Humm in a 1947 article. According to the Food and Agriculture Organization of the United Nations, agar is merely recognized as “a hydrophilic colloid extracted from certain seaweeds of the Rhodophyceae class.” In terms of its actual composition, agar is mostly a combination of two polysaccharides, agaropectin and agarose, which themselves are complex and poorly-characterized polysaccharides made mostly (but not exclusively) from the simple sugar galactose.8