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Microwave dielectric study on hydration of moist collagen

✍ Scribed by Naoki Shinyashiki; Nobuyuki Asaka; Satoru Mashimo; Shin Yagihara; Naoki Sasaki

Publisher
Wiley (John Wiley & Sons)
Year
1990
Tongue
English
Weight
479 KB
Volume
29
Category
Article
ISSN
0006-3525

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✦ Synopsis

Abstract

Two dielectric relaxation peaks were found in moist collagen by the time domain reflectometry. The low‐frequency peak around 100 MHz moves little as the water content is varied. Its relaxation strength depends on the content and vanishes for completely dried collagen. This process is concluded to be due to water molecules strongly bound to the tropocollagen. Amount of the bound water is estimated as 0.12 g water/g collagen. Twenty‐one water molecules are bound to one repeat of the triple helix. The existence of stringlike water chains is suggested. If the water content is less than 0.5 g water/g collagen, the high frequency peak locates between those of bound and bulk water. Water among the tropocollagen is weakly bound to the collagen. In the higher region it does not change much with the content, being close to that of bulk water. The bulk water appears in this region.

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