We measured the binding-state-dependent power absorptions, refractive indices, and dielectric constants of triple-stranded helices (TSHs) and single-stranded helices (SSHs) -glucans in laminarin using terahertz time-domain spectroscopy (TDS). The SSH -glucan was obtained from a TSH -glucan laminarin by a chemical treatment with NaOH solution. The power absorption of TSH -glucan increased more rapidly than that of the SSH -glucan with the frequency increment. The refractive index and dielectric constants of TSH -glucan were also larger than those of the SSH -glucan. This result implies that terahertz-TDS is a very effective method in classifying the conformational state of -glucans.
Conformational characteristics of -glucan in laminarin probed by terahertz spectroscopy
Hee Jun Shin, Seung Jae Oh, Sung In Kim, Ha Won Kim, Joo-Hiuk Son; Conformational characteristics of -glucan in laminarin probed by terahertz spectroscopy. Appl. Phys. Lett. 16 March 2009; 94 (11): 111911. https://doi.org/10.1063/1.3100778
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