Karenia mikimotoi is one of the most well-known harmful bloom species in temperate coastal waters. The present study investigated the characteristics of alkaline phosphatase (APase) and phosphodiesterase (PDEase) activities in hydrolysis of two phosphomonoesters (adenosine triphosphate (ATP) and ribulose 5-phosphate (R5P)) and a phosphodiester (cyclic adenosine monophosphate (cAMP)) in K. mikimotoi and compared its growth and physiological responses to the different forms of phosphorus substrates. K. mikimotoi produced comparable quantities of APase and PDEase to hydrolyze the organic phosphorus substrates, although hydrolysis of the phosphomonoesters was much faster than that of the phosphodiester. The growth of K. mikimotoi on organic phosphorus substrates was comparable to or better than that on inorganic phosphate. The difference in particulate organic nutrients (carbon, nitrogen, and phosphorus) and hemolytic activity supported different rates of hydrolysis-assimilation of the various organic phosphorus substrates by K. mikimotoi. The hemolytic activities of K. mikimotoi in the presence of organic phosphorus substrates were several times those in the presence of inorganic phosphate during the exponential phase. This suggested the potential important role of organic phosphorus in K. mikimotoi blooms.

Using data from listed companies, this study analyzes the respective relevance between listed companies' capital structure, stock equity structure, debt structure and corporation governance in China, with the method of DEA (Data Envelopment Analysis) and T-test. The result shows, for the listed companies of China, relation between debt financing ratio and the governance is not significant, while that between the degree of equity concentration, immobility of share certificate and the governance is minus, and this is contrast with the theoretic conclusion that the relatively concentrative stock equity structure is helpful to corporation governance. At last, this passage concludes that for the listed companies of China, corporate shares have some positive effect on corporation governance, while debt financing can't restrict and supervise it as required theoretically.