Abstract
Various kinds of buckwheat starch separated and refined by the method cited in the previous report were examined with an X-ray diffractometer and a Brabender's amylograph.
It has been recognized that the diffraction pattern derived from the starches of summer-harvested buckwheat usually belongs to the A-spectrum, while that from the starches of autumn?harvested buckwheat often belongs to the CA-spectrum, the first fringe of B-spectrum being found though weak.
This result can be assumed to be due to the difference of the outer temperature in which the plants grew, because the starch of one of the summer kinds, cultured in autumn, was found on examination to have the first fringe very weak.
Besides, the amylograms of the starches, at 8% concentration, of the summer-harvested buckwheat compared with those of autumn-harvested, it has been found that the latter always shows a pasting point 3°C lower and a maximum viscosity higher than the former.
