徳島大学 教育・研究者情報データベース(EDB)

1. 徳島大学.大学院ソシオテクノサイエンス研究部.エネルギーシステム部門.エネルギー制御工学(2006年4月1日〜2016年3月31日)

1. 岩田 哲郎

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2. (英) Ito Ritsuki

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3. 水谷 康弘

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4. (英) Araki Tsutomu

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(英) Autoregressive-Model-based Fluorescence-Lifetime Measurements by Phase-Modulation Fluorometry Using a Pulsed-Excitation Light Source and a High-Gain Photomultiplier Tube

(英) We propose a novel method for measuring fluorescence lifetimes by use of a pulsed-excitation light source and an ordinary or a high-gain photomultiplier tube (PMT) with a high-load resistor. In order to obtain the values of fluorescence lifetimes, we adopt a normal data-processing procedure used in phase-modulation fluorometry. We apply an autoregressive (AR)-model-based data-analysis technique to fluorescence- and reference-response time-series data obtained from the PMT in order to derive plural values of phase differences at a repetition frequency of the pulsed-excitation light source and its harmonic ones. The connection of the high-load resistor enhances sensitivity in signal detection in a certain condition. Introduction of the AR-model-based data-analysis technique improves precision in estimating the values of fluorescence lifetimes. Depending on the value of the load resistor and that of the repetition frequency, plural values of fluorescence lifetimes are obtained at one time by utilizing the phase information of harmonic frequencies. Because the proposed measurement system is simple to construct, it might be effective when we need to know approximate values of fluorescence lifetimes readily, such as in the field of biochemistry for a screening purpose.

1. (英) Article.Affiliation: Division of Energy System, Institute of Technology and Science, The University of Tokushima, 2-1 Minami-Jyosanjima, Tokushima 770-8506, Japan. iwata@me.tokushima-u.ac.jp

2. (英) Article.PublicationTypeList.PublicationType: Journal Article