こんにゃく精粉におけるグルコマンナン 粒子表面の付着物.

The purpose of this study was to clarify the origin of deposits observed on the surface of glucomannan (GM) granules in polishedkonjac flour samples. Konjac flour was immersedin an ethanol solution of appropriate concentration, stainedwith methylene blue, andthen microscopically observed. Stainedmaterials were observedon the surface of slightly swollen granules exposedto the ethanol solution. Some of the granule surfaces exhibiteda &#95patchwork pattern', where the portion corresponding to the seam of the patch was darkly stained. Depending on the granule, various types of patches were observed apart and attached. In addition, the granules with patchwork patterns or patches were damaged in streaks. Staining of the adhered matter is thought to be mainly due to the presence of cell walls and the middle lamella containing pectin. It was concluded that the surface of GM granules in konjac flours might have containedparts or fragments of cell walls or the middle lamella, which originally surroundedthe GM granules in the konjac corm andwere partially damaged or destroyed during mechanical processing. [ABSTRACT FROM AUTHOR]