A Study of Sorbed Water on Cellulose by Pulsed NMR Technique
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概要
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The state of sorbed water on cellulose has been studied by pulsed NMR technique. From the experimental results of spin-lattice relaxation time (T_1) and spin-spin relaxation time (T_2), observed as a spin echo decay time, following conclusions have been derived. (1) Two phases of the sorbed water are classified; the localized and the mobile. (2) The correlation time (τ_N) derived from T_1 using BPP theory, is consistent with that (τ_D) derived from dielectric measurements. (3) T_1 is by one or two order longer than T_2 in contradiction to BPP theory for extremely narrowing case. As an explanation for this fact, we propose that, when we consider about T_2, the effects of magnetic nuclei contained in the absorbent must be taken into account, though no theory is given. (4) The average life-time of water molecule sorbed on cellulose in the localized state is estimated to be several hundredths of a second and to decrease with temperature.
- 社団法人日本物理学会の論文
- 1960-09-05
著者
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HIRAI Akira
Department of Physics, Faculty of Science, Kyoto University
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Hirai Akira
Department Of Internal Medicine Chiba Municipal Hospital
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Hashi Tsuneo
Department Of Physics Faculity Of Science Kyoto University
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Kawai Takao
Yoshida College
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Odajima Akira
Research Institute Of Applied Electricity Hokkaido University
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SASAKI Masahumi
Department of Physics, Faculty of Science, Kyoto University
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Sasaki M.
Department of Human and Information Systems, Faculty of Engineering, Gifu University
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Hirai Akira
Departent Of Materials Science And Engineering Faculty Of Engineering Kyushu Institute Of Technology
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HASHI Tsuneo
Department of Physics, Faculty of Science, Kyoto University
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