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Organic thin-film transistors (OTFTs) with chemically-modified dielectric interfaces are proposed as exhaled-alcohol sensors. Although sensors based on OTFTs have high sensitivity to moisture and would therefore be unsuitable for use as exhaled-gas sensors, it was found that a chemically-modified dielectric interfaces play a significant role in the sensitivity and selectivity of ethanol/moisture....
N,N'-di(1-naphthyl)-N,N'-diphenyl-(1,1'-biphenyl) 4,4'-diamine (NPD) is often used as a hole-transport material in organic light-emitting diodes (OLEDs). The polycrystallization of organic films in OLEDs is thought to be one of the degradation factors of the device performance. It is found that the generation and growth of polycrystalline region in NPD film can be efficiently suppressed by alternate...
[18F]FDG has been the most widely used as the PET tracer for detecting brain and systemic tumors, however, [18F]FDG uptake in adjacent normal brain tissue is so strong that [18F]FDG-PET imaging could not give an effect for brain functional imaging. In order to develop new PET radiopharmaceuticals to complement [18F]FDG, a simple method for automatic synthesis of ethyl [18F]fluoroacetate which can...
A phase modulation of frequency comb light has been applied to measure a fine spectral line of gas at 1.5 mum wavelength range with optical heterodyne-detection method. The measurement range successfully covered 25 GHz with a spectral resolution of 1 MHz.
A simple, rapid and fully automated preparation of [18F]1-amino-3-fluorocyclobutane-l-carboxylic acid ([18F] FACBC) has been developed on a commercial [18F]FDG synthesizer, the TRACERlab MXFDG. The reaction conditions, including reaction temperature, reaction time and precursor amount, were investigated in the F-18 labeling reaction. The hydrolysis reaction of the intermediate and purification process...
A simple and fast method for preparation of ethyl [18F]fluoroacetate which can be operated by remote control has been established, using distillation for purification. By this development, it has become possible to obtain ethyl [18F]fluoroacetate in a short synthesis time of 29 min and with a reproducible radiochemical yield of 28.6 plusmn 3.6 %, (decay corrected). The radiochemical purity of ethyl...
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