Abstract
The properties of the starches of summer-harvested buckwheat (S.B.) were compared with those of autumn harvested buckwheat (A.B.) .
The results are as follows:
(1) The alkali lability number of S.B. (av. 12.1) is almost equal to that of A.B. (av. 11.2) .
(2) Calcium content of S.B. (av. 54.1mg%) is more than that of A.B. (av. 28.9mg%), while phosphorus content of both is very small.
(3) The iodine starch absorption curve of S.B. is slightly above that of A.B. and the blue value of the former (av. 0.349) is higher than that of the latter (av. 0.323) .
(4) The iodine affinity, measured by amperometric titration with iodine, of S.B. (av. 4.42) is almost the same as that of A.B. (av. 4.35) and amylose content in S.B. (av. 25.2%) is similar to that in A.B. (av. 24.9%) .
(5) The intrinsic viscosity of S.B. (av. 2.00) is lower than that of A.B. (av. 2.41) .
