| Abstract: | X-Ray and Nuclear Magnetic Resonance Investigations on Some Structure Problems of Starch. For NMR-spectroscopical investigations on the structure of starch it is important to know the exact location of the water molecules in the granule. By means of D-resonance it could be observed that blocking of the helices of potato starch by iodine had no influence on the structure of the water. By defined methods of degradation of potato starch it could furthermore be observed that the chain length of the amylose molecules does not influence the structure of the water from which we concluded that the water in starch is adsorbed interhelical and not intrahelical. This result is in good agreement with the actual state of knowledge of the structure of the helix of which the inner surface is regarded as hydrophobic and the outer surface as hydrophilic. |
