I. PREPARATION AND PROPERTIES OF A HOMOGENEOUS MUCOID FROM THE SALIVARY GLAND OF SHEEP BY J. F. McCREA*
نویسنده
چکیده
1. The conversion of several sugars to furan derivatives at 600 in 28-3N-sulphuric acid was followed spectroscopically. Variations in the apparent yields and in the shapes of the absorption spectra were attributed to two other absorbing compounds, which were formed at the expense ofthe furan derivatives in amounts dependent on the configuration of the sugars. 2. Another by-product was formed by three of the sugars.when 371N-sulphuric acid was used. Its absorption exceeded that ofthe furfural, and caused a complete change in the appearance of the spectra. 3. The colours formed when sugars were heated at 1000 in 28 3N-sulphuric acid were found to be due to three main absorption bands. The nature of the absorbing substances is discussed.
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