Читать книгу A Text-book of Paper-making - C. F. Cross - Страница 30

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—It has long been known that the urine of herbivorous animals contains hippuric acid, or benzoyl glycocine, as a normal constituent, and it has been shown that the benzoyl radicle necessary to form this body by reacting with the glycocine of the liver, is a product of the digestion of ligno-cellulose. On the other hand, it has been shown that ligno-cellulose contains no benzene compounds as such. We have therefore, in this fact additional evidence that a portion of the complex ligno-cellulose molecule is in what we may term a potentially aromatic condition.