PRODUCTION OF PRESSURE-SENSITIVE MATERIAL OR MAGNETIC MATERIAL

PROBLEM TO BE SOLVED: To obtain piezoelectric particles or magnetic particles of desired size, exhibiting regularity in the dimensions and the shape by a composition, wherein a pressure-sensitive or magnetic material contains pressure-sensitive or magnetic particles and the particles contain dehydrated microorganisms. SOLUTION: A pressure-sensitive or magnetic material 4 is fixed to the surface of a microorganism, comprising a membrane 1, a cytoplasm 2 and deoxyribonucleic acid 3, wherein a pressure-sensitive or magnetic particle has a size substantially same as that of a microorganism support after the production stage. The microorganism may take up the pressure-sensitive or magnetic material and fix it in the cytoplasm 2 in the form of a particle 4. Microorganism, an yeast or a bacterium is incubated on a medium containing a pressure- sensitive or a magnetic substance. Agar is normally employed as the medium and added with the powder of a pressure-sensitive or a magnetic substance at a predetermined concentration. After being incubated in the medium, the microorganisms are dehydrated in order to obtain dry particles.