Abstract: A carbon fiber bundle dispersion method, which sequentially includes the following steps: a degumming step, an oxidation step, a surface impurity removing step, a film forming step, a first baking step, a carbonization reaction step, a slight acid neutralization step, an alkaline matter rinsing step, a second baking step and a rubbing step. Through the present invention, a carbon fiber bundle can be dispersed into thinner carbon fiber fine bundles, without need to be soaked in a special liquid to keep their dispersion state. In an ordinary air, the respective carbon fiber fine bundles can still maintain a separation state relative to each other, and thus are convenient to be used in a subsequent mixing process.

Abstract: A starch-based biodegradable material composition includes: an enzyme-hydrolyzed starch; and a biodegradable polyester selected from at least one of an aliphatic polyester of polybutylene succinate and an aliphatic-aromatic copolyester. The enzyme-hydrolyzed starch is prepared by hydrolyzing a native starch using a starch-hydrolyzing enzyme. The starch-hydrolyzing enzyme has an activity unit ranging from 15000 to 40000.

Abstract: A starch-based biodegradable material composition includes: an enzyme-hydrolyzed starch; and a biodegradable polyester selected from at least one of an aliphatic polyester of polybutylene succinate and an aliphatic-aromatic copolyester. The enzyme-hydrolyzed starch is prepared by hydrolyzing a native starch using a starch-hydrolyzing enzyme. The starch-hydrolyzing enzyme has an activity unit ranging from 15000 to 40000.

Abstract: A novel microorganism, Penicillium citrinum CCRC 930024 and a process of using the microorganism for the production of compactin comprising cultivating Penicillium citrinum CCRC 930024 in a fermentation medium and recovering compactin from the fermentation broth are disclosed.