Pectins are composed of a galactose a glucose derivative.
果胶是由半乳糖变异体和葡萄糖变异体角素构成。
Pectins are demonstrated by staining with ruthenium red.
可以用钌红来鉴定果胶。
The pectic substances can be classed protopectins, pectins and pectin acids.
果胶物质分成原生质果胶，果胶和果胶酸。
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