| abstract |
(57) [Summary] [PROBLEMS] To obtain a material that can be used for insect repelling from scallop shells, to produce an insect repellent from natural materials to make it harmless to the human body, and to make effective use of unnecessary materials. Aim. An insect repellent is obtained from a product obtained by grinding a shell having a crystal structure having a calcite-type structure of calcium carbonate. |