九州大学 · 工学
Hiroshi Noguchi教授の研究室では、質量分析法の動的応答特性が呼吸力学的測定に与える影響を理論的・実験的に解明しており、特にVO2・VCO2の breath-by-breath 計算における誤差要因としての応答遅れ（RESPONSE）の定量的評価を進めています。また、銅を含む金属有機フレームワーク（MOF）を用いたガス吸着挙動の温度依存性や、ゲート圧を示す吸着等温線のメカニズム解明にも取り組んでいます。これらの研究は、医療・環境分野における高精度なガス分析技術の開発に貢献しています。
Figures are computed from collected data and may differ slightly.
Both transport delay (DELAY) and dynamic response (RESPONSE) of a mass spectrometer would theoretically result in considerable errors in the breath-by-breath calculation of VCO2 and VO2. However, curiously, the contribution of RESPONSE has been ignored. The purpose of this study is to quantify the error caused by RESPONSE. We found that RESPONSE of a mass spectrometer was regarded as a first-order response. We determined DELAY and time constant (T) of RESPONSE and compensated the on-line calcula
We measured adsorption and desorption isotherms of methane on [Cu(4, 4'-bipyridine)2(BF4)2] (LPC) at 258, 273, and 303 K. Adsorption proceeds almost vertically at a definite pressure, which is named gate pressure. The lower the measurement temperature, the smaller the gate pressure. The temperature dependence of the gate pressure is expressed by the Clapeyron-Clausius equation, giving a thermodynamic evidence on the clathrate formation between the Cu complex and methane.
The supercritical N2, O2, and CH4 adsorption isotherms on a Cu-based metal−organic framework, [Cu(4,4‘-bipyridine)2(BF4)2]n, over the temperature range of 196−303 K were measured by a gravimetric method. The N2 and O2 adsorption isotherms at 196 K showed a vertical adsorption accompanied by a rectangular hysteresis loop. A method of evaluating the absolute adsorption amount of these gases was developed taking into account the intermolecular interactions for the buoyancy-mediated method. The isot
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