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机具开发前景的六中天然植物提取物
应该说明的一个问题是:天然物不等于均是没有毒性的,合成物也不一定是不安全的。例如天然色素,大部分从植物中提取。国内外竞相开发,普遍认为是较安全的品种。但是从我国已经批准列入使用卫生标准中的40多个天然色素,只有甜菜红、越桔红、辣椒红 ...
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