Color Formation and Gelation of Xyloglucan Upon Addition of Iodine Solutions

✍ Scribed by Yoshiaki Yuguchi; Takayuki Fujiwara; Haruna Miwa; Mayumi Shirakawa; Hirofumi Yajima

• Book ID: 102498276
• Publisher: John Wiley and Sons
• Year: 2005
• Tongue: English
• Weight: 157 KB
• Volume: 26
• Category: Article
• ISSN: 1022-1336
• DOI: 10.1002/marc.200500283

✦ Synopsis

Abstract

Summary: We developed a novel thermo‐reversible gelation system by mixing xyloglucan with an iodine solution. Xyloglucan dissolves in water to produce a colorless solution. However, the addition of iodine solution induces color and gelation; heating causes the gel to melt and become colorless. According to results from spectroscopic and small‐angle X‐ray scattering experiments, the gelation mechanism was proposed to involve two xyloglucan chains that associate side‐by‐side and incorporate iodine and/or iodide ions.

Xyloglucan gel prepared by mixing xyloglucan and iodine solution and heating to 60 °C, followed by cooling.

imageXyloglucan gel prepared by mixing xyloglucan and iodine solution and heating to 60 °C, followed by cooling.