- A mutant strain ZM-8 with high activity of cellulase was selected from parent strain of Aspergillus niger by treatment of space conditions.
- The activity of cellulase and component of enzyme protein were main factors affecting denim finish with wash-out effect.
- The disease shuts the boy off from most of the activities of normal children.
- He directs the activities of the club.
- He partook in the activities of the school.