Publications by authors named "Takeshi Eda"
Various volatile organic compounds (VOCs) in breath exhaled by patients with lung cancer, healthy controls, and patients with lung cancer who underwent surgery for resection of cancer were analyzed by gas condenser-equipped gas chromatography-mass spectrometry (GC/MS) for development of an exhaled breath monitoring prototype system involving metal oxide gas sensors, a gas condenser, and gas chromatography columns. The gas condenser-GC/MS analysis identified concentrations of 56 VOCs in the breath exhaled by the test population of 136 volunteers (107 patients with lung cancer and 29 controls), and selected four target VOCs, nonanal, acetoin, acetic acid, and propanoic acid, for use with the condenser, GC, and sensor-type prototype system. The prototype system analyzed exhaled breath samples from 101 volunteers (74 patients with lung cancer and 27 controls).
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- The study presents the synthesis of dibenzotetrakisdehydro[12]- and dibenzopentakisdehydro[14]annulenes, utilizing [4.3.2]propellatriene-anneleted dehydroannulenes as precursors and employing UV irradiation for cycloreversion.
- Although the [12]DBA could not be directly observed through NMR, it was detected as Diels-Alder adducts and characterized via UV-vis and FT-IR spectroscopy.
- The [14]DBA, on the other hand, was more stable and detectable using NMR spectroscopy, and its properties were further analyzed through its Diels-Alder adducts and UV-vis spectroscopic techniques