Buy: lactose, Sweet potato powder, wheat starch, some other food ingredients for biscuit producing, processing equipment for biscuit.
采购：乳糖，地瓜粉，小麦淀粉，等饼干生产原料及饼干生产设备。
Melanins are produced by polyphenol oxidase (PPO) during sweet potato processing, which can affect the whiteness of sweet potato starch.
甘薯破碎后经多酚氧化酶（ PPO）的作用，严重影响淀粉的白度。
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