Fractionation of the Swallow's-Nest Mucilage and Its IR Spectra
1975 Volume 22 Issue 9 Pages 450-454
Details
1975 Volume 22 Issue 9 Pages 450-454
The chemical components of the edible swallow'snest (Enso) was studied. The hot water soluble components of the swallow's nests (S.N), the natural and the refined ones, were separated into cold water-insoluble fractions (R) and cold water-soluble fractions (F). The fractions, R and F were further fractionated by means of the NaI method, and their IR spectra were examined.
1. The average contents of R in the mucilagenous substances were 15.6% for S.N., natural and 66.3% for S.N., refined, respectively.
2. In IR spectra of R and F fractions, anhydrosugar was presumed to occur.
3. The NaI soluble fractions were only 14 to 16% in the R fractions and were dominant in F fractions for all of the samples.
4. In both of the NaI soluble fractions (RS) and the NaI insoluble fractions (RI) in fraction R, absorptions attributed to a sulphate ester were observed.
