**Author details**

Hideaki Nakamura Department of Liberal Arts, Tokyo University of Technology, Tokyo, Japan

Address all correspondence to: nakamurahd@stf.teu.ac.jp

© 2022 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

*Developmental Studies on Practical Enzymatic Phosphate Ion Biosensors and Microbial BOD… DOI: http://dx.doi.org/10.5772/intechopen.104377*
