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Volume 88, Issue 6
Displaying 1-8 of 8 articles from this issue
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Original Research Paper
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Shoya IMAMOTO, Hiroaki KOUZAI2015 Volume 88 Issue 6 Pages 161-165
Published: June 20, 2015
Released on J-STAGE: September 20, 2015
JOURNAL FREE ACCESSThe epoxy resin was synthesized from curcumin and epichlorohydrin. The obtained epoxy resin had Mn = 1680, Mw = 2380, Mw / Mn = 1.5.Then, the curing of the epoxy resin was carried out at room temperature using ethylenediamine and the obtained cured epoxy showed fluorescence and excellent physical properties. Structural analysis of the epoxy resin was measured by FT-IR, 1H and 13C NMR. The UVvis absorption spectrum of the cured epoxy confirmed an absorption peak at 460 nm. In addition, the fluorescence spectrum of the cured epoxy was confirmed at 500 nm. The glass transition temperature and thermal weight loss temperature of the cured epoxy were 90°C and 375°C respectively. The stress-strain curves showed that the cured epoxy was brittle and hard.View full abstractDownload PDF (858K) -
Yoshiaki YAMAMOTO, Yuki KAWASHIMA, Yasuki YAMAUCHI, Yoshimune NONOMURA2015 Volume 88 Issue 6 Pages 166-169
Published: June 20, 2015
Released on J-STAGE: September 20, 2015
JOURNAL FREE ACCESSWe evaluated the appearance of artificial skin under organic light-emitting diode (OLED) light and light emitting diode (LED) light. Although the chromaticity and the correlated color temperature of light sources were the same, many subjects evaluated that the artificial skin under OLED light appeared more reddish and less yellowish than that under LED light. These differences in appearance resulted from the difference of the spectral components of light sources, especially the spectral radiance of 570 ~ 590 nm was smaller under OLED light.View full abstractDownload PDF (947K)
Special Edition Employing Surfaces for Sensor Technologies
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Hidenobu AIZAWA2015 Volume 88 Issue 6 Pages 170
Published: June 20, 2015
Released on J-STAGE: September 20, 2015
JOURNAL FREE ACCESSDownload PDF (218K)
Review
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Tomo OSAWA2015 Volume 88 Issue 6 Pages 171-174
Published: June 20, 2015
Released on J-STAGE: September 20, 2015
JOURNAL FREE ACCESSTo develop a water-resistant and detergent-washable sunscreen, we focused on pH-responsive polymer, which is hydrophobic in acidic environment and hydrophilic in basic environment. MAU homo-polymer and AMPS/MAU co-polymer were synthesized and revealed to have desired pH-responsiveness. AMPS/MAU co-polymer showed more rapid pH-responsiveness than MAU homo-polymer. Titanium dioxide treated with AMPS/MAU co-polymer also has the same pH-responsiveness. The treated powder did not disperse in pH 5 buffer, but could be dispersed in pH 10 buffer. The sunscreen with AMPS/MAU-treated titanium dioxide showed high waterresistance and excellent detergent-washability. As a result, a novel sunscreen that has both water resistance and detergent-washability was successfully obtained for the first time.View full abstractDownload PDF (745K)
Current Topics
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Seung-Woo LEE, Yusuke OGIMOTO, Shunichi WAKAMATSU2015 Volume 88 Issue 6 Pages 175-180
Published: June 20, 2015
Released on J-STAGE: September 20, 2015
JOURNAL FREE ACCESSQuartz crystal microbalance (QCM) sensors were constructed with porous films comprising silica nanoparticles and poly(allylamine hydrochloride) (PAH). The films were deposited via an electrostatic self-assembly method, and they exhibited considerable sensitivity to relative humidity. The infusion of poly(acrylic acid) (PAA)into the multilayered porous films (5 or 10 cycles) enabled the construction of a highly sensitive and selective QCM sensor device for the detection of gaseous ammonia. Two types of QCM sensors, with and without PAA, were used as sensors for the simultaneous quantitative detection of humidity and ammonia. A thorough Fourier transform infrared (FTIR) investigation of the fabricated films was conducted to elucidate the mechanism of the chemical interaction at the sensor device interface. Preliminary tests were conducted to detect low concentrations of ammonia in human breath, which are of clinical relevance. The results of these tests showed that the sensor can detect ammonia in human breath at pathological levels (greater than 3 ppm).View full abstractDownload PDF (1730K)
Review
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Takuo AKIMOTO, Mitsuru YASUDA2015 Volume 88 Issue 6 Pages 181-186
Published: June 20, 2015
Released on J-STAGE: September 20, 2015
JOURNAL FREE ACCESSAn optical interference mirror slide composed of a metal and a dielectric thin layer can enhance the fluorescence from fluorophore placed on the top the slide. By more than 10-fold enhancement can be achieved with an optimal dielectric thickness of the slide. This enhancement is considered to be primarily due to double interference of the excitation light and the fluorescence emission in the dielectric layer. In this report, relationship between the fluorescence enhancement and the dielectric layer thickness obtained with four kinds of fluorophores was explained. Moreover, applications of the slide to the detection of protein and DNA were described.View full abstractDownload PDF (4761K)
Serial Lecture
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Ritsuo IWATA2015 Volume 88 Issue 6 Pages 187-192
Published: June 20, 2015
Released on J-STAGE: September 20, 2015
JOURNAL FREE ACCESSInternational standardization is necessary for optimum globalization considering its environmental influence. From this viewpoint, the recent history of activities related to the international standardization of adhesives and adhesion evaluation technologies are reviewed.View full abstractDownload PDF (1406K)
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Wataru OSHIKAWA2015 Volume 88 Issue 6 Pages 193-198
Published: June 20, 2015
Released on J-STAGE: September 20, 2015
JOURNAL FREE ACCESSWith deterioration of infrastructure built for the rapid economic growth period, importance of the maintenance increases. The corrosion environment evaluation for the maintenances of the infrastructure was described. First of all, it was shown to be able to calculate concentration and thickness of water film formed on metal surface according to a sea salt and relative humidity. Next, the small coupon examination and the ACM sensor were taken up as an environmental evaluation technique. The measurement of the ACM sensor was explained as an application example in the steel bridge.View full abstractDownload PDF (3214K)
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