Carbohydrate amylase composition

While working on dogs Pavlov found that the composition of the saliva depended on the nature of the stimulus and that, whereas dry food or sand evoked a copious watery secretion, the secretion produced by meat was much thicker and richer in mucosubstances. It has also been found that the consumption of a high-carbohydrate diet is followed by a rise in the amylase content of mixed saliva. It seems likely that alterations in response to different forms of stimulation result mainly from differential alterations in the rate of flow of various glands. It is possible, however, that different stimuli can alter the composition of saliva from a particular gland without affecting the rate of flow. 

The starch removal from starch-plastic composites by amylose is evidenced in the FT-IR spectrum of starch-EAA-PE treated with Bacillus sp XI amylase for 72 h at room temperature. The carbohydrate -OH and C-O absorbance bands are drastically reduced— Fig. 4. 

INULIN, or Dahlia starch, is the commonest example of a fructosan, or polymer of fructose. It is a reserve carbohydrate found in the roots and leaves of Composite and other plants. The chief sources are the tuber of the Dahlia, which contains 10 per cent., the Jerusalem Artichoke, Chicory, and Dandelion. It is not found in animals. Inulin is a white, tasteless powder, closely resembling starch, but giving no colour with iodine. Its solutions are laevo-rotatory, [a] = — 40°, non-reducing, and not hydrolysable by amylases. When acted on by acids or the enzyme inulase, which accompanies it in the plant, inuhn is converted completely into fructose. 

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