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371 results on '"Shimanouchi, Toshinori"'

58. Recent Development of Optimization of Lyophilization Process

Author

Kawasaki, Hidenori, Shimanouchi, Toshinori, and Kimura, Yukitaka

Subjects
Article Subject
Abstract

The objective of this review is to survey the development of the optimization of lyophilization. The optimization study of the lyophilizer has been roughly developing by the order of (i) trial-and-error approach, (ii) process modeling using mathematical models, (iii) scalability, and (iv) quality-by-design. From the conventional lyophilization studies based on the trial-and-error, the key parameters to optimize the operation of lyophilization were found out, i.e., critical material attributes (CMAs), critical process parameters (CPPs), and critical quality attributes (CQAs). The mathematical models using the key parameters mentioned above have been constructed from the viewpoints of the heat and mass transfer natures. In many cases, it is revealed that the control of the primary drying stage determines the outcome of the lyophilization of products, as compared with the freezing stage and the secondary drying stage. Thus, the understanding of the lyophilization process has proceeded. For the further improvement of the time and economical cost, the design space is a promising method to give the possible operation range for optimizing the lyophilization operation. This method is to search the optimized condition by reducing the number of key parameters of CMAs, CPPs, and CQAs. Alternatively, the transfer of lyophilization recipe among the lab-, pilot-, and production-scale lyophilizers (scale-up) has been examined. Notably, the scale-up of lyophilization requires the preservation of lyophilization dynamics between the two scales, i.e., the operation of lab- or pilot-scale lyophilizer under HEPA-filtrated airflow condition. The design space determined by focusing on the primary drying stage is large and involves the undesired variations in the quality of final products due to the heterogeneous size distribution of ice crystals. Accordingly, the control of the formation of the ice crystal with large size gave impact on the product quality and the productivity although the large water content in the final product should be improved. Therefore, the lyophilization should take into account the quality by design (QbD). The monitoring method of the quality of the product in lyophilization process is termed the “process analytical technology (PAT).” Recent PAT tools can reveal the lyophilization dynamics to some extent. A combination of PAT tools with a model/scale-up theory is expected to result in the QbD, i.e., a quality/risk management and an in situ optimization of lyophilization operation.

Published
2019
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71. Effect of Phosphatidylserine and Cholesterol on Membrane-mediated Fibril Formation by the N-terminal Amyloidogenic Fragment of Apolipoprotein A-I

Author

Mizuguchi, Chiharu, primary, Nakamura, Mitsuki, additional, Kurimitsu, Naoko, additional, Ohgita, Takashi, additional, Nishitsuji, Kazuchika, additional, Baba, Teruhiko, additional, Shigenaga, Akira, additional, Shimanouchi, Toshinori, additional, Okuhira, Keiichiro, additional, Otaka, Akira, additional, and Saito, Hiroyuki, additional

Published
2018
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76. DESIGN AND DEVELOPMENT OF MEMBRANE CHIP SYSTEM FOR STRESS SENSOR

Author

Kuboi, Ryoichi, Shimanouchi, Toshinori, and Umakoshi, Hiroshi

Subjects
Membrane Chip, Liposome, Amyloidgenic Protein, GeneralLiterature_MISCELLANEOUS, Membrane Stress Biotechnology
Abstract

Joint Research on Environmental Science and Technology for the Earth

Published
2007

77. DEVELOPMENT OF ELECTROACTIVE POLYMETHYLTHIOPHENE BASED DOPAMINE SENSOR

Author

Vu, Thi Huong, Do, Phuc Quan, Nguyen, Minh Tue, Shimanouchi, Toshinori, Pham, Hung Viet, and Kuboi, Ryoichi

Subjects
polymethylthiophene, Nafion, conducting polymer, electrochemical, dopamine, GeneralLiterature_MISCELLANEOUS
Abstract

Joint Research on Environmental Science and Technology for the Earth

Published
2007

79. Development of Chemical-and Bio-sensor for Environmental Monitoring

Author

Kuboi, Ryoichi and Shimanouchi, Toshinori

Subjects
sensor, thiol self-assemblied membrane/cupper particle, conducting polymers, GeneralLiterature_MISCELLANEOUS, Membrane Stress Biotechnology
Abstract

Joint Research on Environmental Science and Technology for the Earth

Published
2006

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