Temperaturabhängigkeit des kernmagnetischen Relaxationsverhaltens von Wasserprotonen in nativer Stärke / The Temperatur Behaviour of the Transverse Relaxation of the Protons of Water Molecules in Native Starch

Autor:	H.-J. Hennig, Hans Lechert
Rok vydání:	1976
Předmět:	chemistry.chemical_compound chemistry Transverse relaxation Starch Polymer chemistry General Physics and Astronomy Physical chemistry Molecule Physical and Theoretical Chemistry Mathematical Physics
Zdroj:	Zeitschrift für Naturforschung A. 31:306-309
ISSN:	1865-7109 0932-0784
Popis:	Measurements of the temperature behaviour of the transverse relaxation of the protons of water molecules in native potatoe starch show two sorption states and an exchange of protons between these states. From model calculations of Woessner and Zimmermann the occupation of the states and the exchange rate can be evaluated. The portion of more tightly bound water molecules comes out to be about 17%. The energy of activation of the exchange decreases with increasing water content and lies with values in the range of 26 to 31 kJ/mol distinctly below the values observed usually for proton-exchange processes in similar systems.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::ac227058c4a964b9dd7fd97aa2db7919 https://doi.org/10.1515/zna-1976-3-416 Zobrazit plný text záznamu