Company Filing History:
3 out of 161 
1 out of 23 Years Active: 1989-1998
Title: The Innovative Contributions of Toshiaki Doi
Introduction
Toshiaki Doi, an accomplished inventor based in Kanagawa, Japan, has made significant strides in the field of biotechnology with a focus on enzymatic processes. With four patents to his name, Doi has demonstrated a commitment to enhancing the preservation and application of biocatalysts, particularly in industrial settings.
Latest Patents
Among his latest innovations is a method for preserving the activity of nitrile hydratase or nitrilase enzymes derived from microbial cells. This groundbreaking method allows for the preservation of enzyme activity for prolonged periods, up to 300 days, without the risk of cell lysis or enzyme deterioration at room temperature. His approach utilizes a neutral or weakly basic aqueous solution of inorganic salts, providing a cost-effective alternative to traditional preservation methods which require significant labor and cooling expenses.
Another notable patent involves the immobilization of biocatalysts within a storage-stable copolymer gel. This method encapsulates biocatalysts such as cells and enzymes within a gel formed from specific monomers, including N,N-dialkylacrylamide. The resulting polymer gel exhibits excellent stability and does not deteriorate even after an extended period of ordinary temperature storage.
Career Highlights
Toshiaki Doi has had a distinguished career, having worked with prominent companies such as Nitto Chemical Industry Co., Ltd. and Nitto Kagaku Kogyo Kabushiki Kaisha. His contributions to these organizations have furthered the development of biotechnological applications and enhanced efficiency in enzyme-related processes.
Collaborations
Throughout his career, Doi has collaborated with notable colleagues including Yoshiaki Satoh and Yasutaka Nakashima. These partnerships have played a crucial role in the innovation and refinement of his methodologies, leading to advancements that benefit both academic and industrial sectors.
Conclusion
Toshiaki Doi's inventive spirit and dedication to biotechnological advancements have positioned him as a leading figure in his field. His patented methods not only facilitate the preservation of valuable enzymatic activity but also offer practical solutions for industrial applications, underscoring the importance of innovation in biotechnology.