2021 Fiscal Year Final Research Report

The influence of indoor air quality on the maintenance and improvement of human's health and intellectual productivity

Research Project

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Project/Area Number	19K12455
Research Category	Grant-in-Aid for Scientific Research (C)
Allocation Type	Multi-year Fund
Section	一般
Review Section	Basic Section 64060:Environmental policy and social systems-related
Research Institution	Chiba University
Principal Investigator	Nakayama Yoshitake 千葉大学, 予防医学センター, 特任准教授 (30620819)
Co-Investigator(Kenkyū-buntansha)	高谷一成独立行政法人労働者健康安全機構労働安全衛生総合研究所, 環境計測研究グループ, 任期付研究員 (20804298) 戸高恵美子千葉大学, 予防医学センター, 教授 (30334212) 中岡宏子千葉大学, 予防医学センター, 准教授 (60588648) 森千里千葉大学, 大学院医学研究院, 教授 (90174375) 鈴木規道千葉大学, 予防医学センター, 准教授 (90724849)
Project Period (FY)	2019-04-01 – 2022-03-31
Keywords	室内環境 / 空気環境 / 感性評価 / 質問紙 / 脳波 / 実験住宅
Outline of Final Research Achievements	We investigated the effect of the sum of volatile organic compounds on the level of relaxation in two laboratory houses with almost identical interior and exterior appearances. The electroencephalogram(EEG) was monitored to evaluate the degree of personal relaxation objectively. The experiments were conducted in laboratory houses (LH) A and B with lower and higher levels of ΣVOCs, respectively. A total of 168 healthy volunteers participated, who each performed the task for 20 min, followed by a 10-min break, and EEG was measured during the break. Simultaneously as subjective evaluations, the participants were asked to fill a questionnaire regarding the intensity of odor and preference for the air quality in each LH. The subjective evaluation showed a significant association between ΣVOCs and participants’ relaxation, and the objective evaluation indicated that the participants were more relaxed in the LH with lower levels of ΣVOCs than that with higher levels.
Free Research Field	環境工学
Academic Significance and Societal Importance of the Research Achievements	室内空気質の改善はシックハウス症候群の発症を予防するための対策だけでなく、健常者にとっても生活の質を向上させられる可能性がある。特に近年では、高機密・高断熱の住宅が増え、温熱環境に対する機能性の向上と関心が高まる中、継続的に空気質に対する知見を調査していくことは重要である。本研究の成果を、住宅の提供者と利用者に啓発することで、より良い住環境の開発と普及・拡大に繋がり、疾患の予防と健康の増進に寄与すると考えられる。