@article{oai:oacis.repo.nii.ac.jp:00002195,
 author = {Kitamura, Kenichi and Murai, Koji and Wakida, Shinichi and Kintoki, Takuya and Osaki, Shuto},
 issue = {1},
 journal = {Transactions of Navigation},
 month = {},
 note = {The primary aim of our research is to complete physiological index to evaluate mental workload. We focus on salivary NO3- as an index, which is emitted to blood vessels from vascular endothelial cells when a human body receives mental workload. The development of a device to measure NO3- in vascular endothelial cells is thus required for the evaluation of mental workload. The device developed here is composed of field-effect transistors and ion-selective membranes. We have adopted a polymer for use with an ion-selective membrane. Two experiments were performed to verify the drift in the device characteristics and to validate the characteristics of the polymer as the ion-selective membrane. Verified experimental results indicated that the polymer was useful as ion-selective membrane material, which has less drift characteristics for a long time measurement. Validated experimental results indicated that NO3- device with new polymer KP-13 has the effectiveness of measurement of mental workload on the spot, compared with values from NO3- device with KP-13 and other physiological indices.},
 pages = {1--9},
 title = {Application of Polymer-Based Nitrate Ion-Sensitive Field-Effect Transistors to On-site Measurement of Mental Workload},
 volume = {6},
 year = {2021}
}