Mitsuyoshi Okamoto

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A new approach to the determination of human breath acetone with particle-packed sample preparation needle was developed. The extraction needle was packed with a copolymer of methacrylic acid and ethylene glycol dimethacrylate as the extraction medium. For the analysis of breath sample, exhaled breath was collected in a sampling bag, and 50 mL of the breath(More)
BACKGROUND Isoprene in human breath is said to be related to cholesterol metabolism, and the possibility of the correlations with some clinical parameters has been studied. However, at this stage, no clear benefit of breath isoprene has been reported for clinical diagnosis. In this work, isoprene and acetone concentrations were measured in the breath of(More)
Depth from Defocus (DFD) is known as a technology which is able to estimate depth by a monocular camera, without any additive devices. However, it has to get two blurred images with different focused distance sequentially so that subjects or the camera itself can move in the short interval of consecutive shots. Conventional DFD is intolerant to such image(More)
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