abstract |
(1) propionic acid liberating agent containing PHB powder with a weight average molecular weight of 10,000 or more, (2) acetic acid liberating agent containing PHB powder with a weight average molecular weight of 10,000 or more, (3) propionic acid or acetic acid for porcine intestinal bacteria To provide a swine growth promoter containing PHB powder having a weight average molecular weight of 10,000 or more, which liberates |