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Comparison of luminescent properties of helicene-like bibenzothiophenes with o-carborane and 5,6-dicarba-nidodecaborane

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Science China Chemistry 2018年第8期61卷 940-946页

作者： Kenta Nishino Kazushi Hashimoto Kazuo Tanaka yasuhiro Morisaki Yoshiki Chujo Department of Polymer Chemistry Graduate School of Engineering Kyoto University Department of Applied Chemistry for Environment School of Science and Technology Kwansei Gakuin University

This article describes comparison of the anchoring effect on electronic properties of the helicene-like bibenzothiophene between o-carborane and 5,6-dicarba-nido-decaborane. The o-carborane and nido-decaborane-fused bibenzothiophenes were simultaneously obtained in the same reaction and successfully isolated. Initially, the X-ray single crystal analysis revealed that the helicene-like distorted structure was realized in the nido-decaborane-fused bibenzothiophene. From optical measurements in the solution state, distinct different characteristics depending on the type of anchors were observed. It was summarized that the absorption and luminescent properties originated from weak π-conjugation at the bibenzothiophene moiety in the o-carboranefused compound were obtained, whereas robust π-conjugation and significant emission from the intramolecular charge transfer state were detected from the nido-decaborane-fused compound. These data can be explained by the theoretical results that π-conjugation was restrictedly developed within the bibenzothiophene moiety in frontier orbitals of the o-carborane-fused compound. In contrast, π-conjugation can be constructed even through the distorted bibenzothiophene because of the nido-decaborane unit. Moreover, the intramolecular charge transfer state should be realized because of electronic interaction involving the nido-decaborane unit in the excited state. Furthermore, it was demonstrated that the nido-decaborane-fused compound possessed solid-state emission and mechanochromic luminescent properties. The π-conjugation on the distorted structure supported by the nido-decaborane anchor should play a significant role in suppressing aggregation-caused quenching followed by presenting solid-state emission with stimuli responsiveness.

关键词： carborane helicene mechanochromism aggregation-induced emission

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Practical BRDF reconstruction using reliable geometric regions from multi-view stereo

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Computational Visual Media 2019年第4期5卷 325-336页

作者： Taishi Ono Hiroyuki Kubo Kenichiro Tanaka Takuya Funatomi yasuhiro Mukaigawa Nara Institute of Science and Technology IkomaNara 630-0192Japan

In this paper,we present a practical method for reconstructing the bidirectional reflectance distribution function(BRDF)from multiple images of a real object composed of a homogeneous *** key idea is that the BRDF can be sampled after geometry estimation using multi-view stereo(MVS)*** contribution is selection of reliable samples of lighting,surface normal,and viewing directions for robustness against estimation errors of *** method is quantitatively evaluated using synthesized images and its effectiveness is shown via real-world experiments.

关键词： BRDF reconstruction multi-view stereo(MVS) photogrammetry rendering

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Hemodynamic and morphologic changes of peripheral hepatic vasculature in cirrhotic liver disease: A preliminary study using contrast-enhanced coded phase inversion harmonic ultrasonography

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World Journal of Gastroenterology 2005年第40期11卷 6348-6353页

作者： Rong-Qin Zheng Bo Zhang Masatoshi Kudo yasuhiro Sakaguchi Department of Ultrasound theThird Affiliated Hospital Sun Yat-Sen University Guangzhou510630 Guangdong Province China Department ofGastroenterology and Hepatology Kinki University School of Medicine Osaka-Sayama Japan

AIM: To provide the useful information for the diagnosis of liver cirrhosis by observing the morphology of peripheral hepatic vessels and the hemodynamics of microbubble arrival time in these ***: Twenty-one subjects including 5 normal volunteers and 16 patients (liver cirrhosis, n=10;chronic hepatitis, n=6) were studied by contrast-enhanced coded phase inversion harmonic sonography (GE LOGIQ9 series) using a 6-8 MHz convex-arrayed wide-band transducer. The images of peripheral hepatic artery,portal and hepatic vein were observed in real-time for about 2 min after intravenous injection of Levovist. The time when microbubbles appeared in the peripheral vessels (microbubble arrival time) was also recorded. The morphologic changes of peripheral hepatic vasculature were classified as marked, slight, and no changes based on the regularity in caliber, course, ramification, and the delineation of vessels compared to normal ***: The microbubble arrival time at peripheral artery, portal, and hepatic vein was shorter in cirrhotic patients than in chronic hepatitis patients and normal subjects. The marked, slight and no morphologic changes of peripheral hepatic vasculature found in 5 (5/6,83.3%), 1 (1/6, 16.7% ), and 0 (0/6, 0%) liver cirrhosis patients, respectively, and in 1 (1/10, 10%), 6 (6/10,60%), and 3 (3/10, 30%) chronic hepatitis patients,respectively. There was a significant difference between the two groups (P＜0.001).CONCLUSION: Evaluation of the hemodynamics and morphology of peripheral hepatic vasculature by contrast-enhanced coded pulse inversion harmonic sonography can provide useful information for the diagnosis of liver cirrhosis.

关键词： Contrast medium Sonography Livercirrhosis Hemodynamics

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Large Mesoporous Tin Dioxide Powders for Gas Sensor Materials-Effects of Various Additives on the Mesostructure and the H_2 Sensing Properties

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稀有金属材料与工程 2006年第A3期35卷 455-458页

作者： Takeo Hyodo Kumiko Murayama yasuhiro Shimizu Makoto Egashira Department of Materials Science and Engineering Faculty of EngineeringNagasaki University1-14 Bunkyo-machiNagasaki 852-8521Japan

Preparation of large mesoporous tin dioxide (lm-SnO_2) under various conditions was attempted by utilizing a self-assembly of a triblock copolymer,P123:(EO)_(20)(PO)_(70)(EO)_(20) or F127:(EO)_(106)(PO)_(70)(EO)_(106)(EO:ethylene oxide and PO: propylene oxide).The sensor fabricated from calcined lm-SnO_2 powder,which had been prepared by using P123 as a template,Na_2SnO_3 as a tin source,and TEOS as an additive ([TEOS]/[Na_2SnO_3]=0.5 in the precursor solution),showed the largest response to 1×10^(-3) hydrogen at 350℃among the sensors *** existence of two kinds of SnO_2 particles with different sizes (ca.100 nm and several nm in diameter) may be important to improve the hydrogen sensing properties drastically.

关键词： mesoporous tin dioxide triblock copolymer triethoxyorthosilicate hydrogen gas sensor

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Accelerated biodegradation of nitrophenols in the rhizosphere of Spirodela polyrrhiza

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Journal of Environmental Sciences 2012年第5期24卷 800-807页

作者： Risky Ayu Kristanti Masahiro Kanbe Tadashi Toyama yasuhiro Tanaka Kazuhiro Mori Interdisciplinary Graduate School of Medicine and Engineering University of Yamanashi 4-3-11 Takeda Kofu Yamanashi 400-8511 Japan

We investigated the biodegradation of 2-nitrophenol （2-NP）, 4-nitrophenol （4-NP）, and 2,4-dinitrophenol （2,4-DNP） in the rhizosphere of Spirodela polyrrhiza plants by conducting degradation experiments with three river water samples supplemented with each nitrophenol （NP）. We then isolated NP-degrading bacteria both from the S. polyrrhiza roots and from the river water. In the river water samples, removal of the three NP was accelerated in the presence of S. polyrrhiza plants. The three NPs persisted in an autoclaved solution with sterile plants suggests that NP removal was accelerated largely by bacterial NP biodegradation rather than by adsorption and uptake by the plants. We isolated 8 strains of NP-degrading bacteria： 6 strains from the S. polyrrhiza roots and 2 strains from river water without the plants. The 2-NP- and 2,4-DNP-degrading bacteria were isolated only from the S. polyrrhiza roots. The 4-NP- degrading bacteria different from those isolated from the river water samples were also found on S. polyrrhiza roots. The 2-NP- and 4-NP-degrading strains isolated from the roots utilized the corresponding NP （0.5 mmol/L） as the sole carbon and energy source. The 2,4-DNP-degrading strains isolated from the roots showed substantial 2,4-DNP-degrading activity, but the presence of other carbon and energy sources was required for their growth. The isolated NP-degrading bacteria from the roots must have contributed to the accelerated degradation of the three NPs in the rhizosphere of S. polyrrhiza. Our results suggested that rhizoremediation with S. polyrrhiza may be effective for NP-contaminated surface water.

关键词： Spirodela polyrrhiza rhizosphere nitrophenol biodegradation

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Distance dependence of atomic-resolution near-field imaging on α-Al2O3 （0001） surface with respect to surface photovoltage of silicon probe tip

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Nano Research 2016年第2期9卷 530-536页

作者： Junsuke Yamanishi Takashi Tokuyama Yoshitaka Naitoh Yan Jun Li yasuhiro Sugawara Department of Applied Physics Graduate School of Engineering Osaka University 2-1 Yamada-oka Suita Osaka 565-0871 Japan

Recently, we achieved atomic-resolution optical imaging with near-field scanning optical microscopy using photon-induced force detection. In this technique, the surface photovoltage of the silicon-tip apex induced by the optical near field on the surface is measured as the electrostatic force. We demonstrated atomicresolution imaging of the near field on the α-Al2O3 （0001） surface of a prism. We investigated the spatial distribution of the near field by scanning at different tip-sample distances and found that the atomic corrugation of the near-field signal was observed at greater distances than that of the atomic force microscopy signal. As the tip-sample distance increased, the normalized signal-to-noise ratio of the near field is in a gradual decline almost twice that of the frequency shift （Δf）.

关键词： near-field scanning optical microscopy near field surface photovoltage ci-Al2O3 (0001) force detection

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An analysis on possibility of intelligent speed adaptation in terms of drivers' consciousness

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Journal of Traffic and Transportation Engineering(English Edition) 2015年第3期2卷 136-144页

作者： Ryosuke Ando yasuhiro Mimura Research Department Toyota Transportation Research Institute

Intelligent speed adaptation （ISA） is considered as an effective measure to reduce number of traffic accidents in the field of intelligent transportation systems （ITS）. On the other hand, its effects for traffic safety are still doubted by many people. To make the possibility analysis, an experiment is conducted by using driving simulator. Regarding ISA ap- proaches, there are three modes： mandatory, voluntary and advisory. Among them, the advisory type seems to be the easiest one to introduce. Therefore, we focus on the advisory mode in this study by considering ISA just at the beginning stage in Japan. The experiment consists of four steps： without ISA, ISA using pictures, ISA using voices and again without ISA. The outputs obtained from the driving simulator are analyzed combined with the consciousness of the participants. The experiment shows that the ISA can improve recognition of speed limitation especially for people who have random rambling or looking aside tendency. Furthermore, the ISA especially when using voices can contribute in changing the consciousness of people who are aggressive in driving. Their driving speeds can reduce so that positive effects on traffic safety can be concluded.

关键词： Intelligent transportation systems Intelligent speed adaptation Advisory ISA Driving simulator Zone 30 Speed management

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Foreword to the Special Issue on Micro- and Nano-Metrology in Japan(I)

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Nanomanufacturing and Metrology 2021年第2期4卷 1-2页

作者： Yuki Shimizu yasuhiro Mizutani Masaki Michihata Department of Finemechanics Tohoku UniversitySendai 9808579Japan Department of Mechanical Engineering Osaka UniversitySuita 5650871Japan Department of Precision Engineering The University of TokyoBunkyo 1138654Japan

Micro-and nano-metrology occupies an important position in modern production engineering where higher-precision machining is required.A visualization of the process is indispensable for the creation of new technologies in stateof-the-art manufacturing that deals with the geometrical quantity in micrometers/*** micro-and nano-metrology is thus becoming more and more important as the platform of various manufacturing technologies,as well as strategic tools for responding to rapidly changing fabrication techniques in many scientific and industrial fields.

关键词： metrology becoming Japan

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Is the measurement of drain amylase content useful for predicting pancreas-related complications after gastrectomy with systematic lymphadenectomy?

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World Journal of Gastroenterology 2020年第14期26卷 1594-1600页

作者： Koki Nakanishi Mitsuro Kanda Junichi Sakamoto yasuhiro Kodera Department of Gastroenterological Surgery(Surgery Ⅱ) Nagoya University Graduate School of MedicineNagoya 466-8550Japan Tokai Central Hospital Kakamigahara 504-8601Japan

Many studies investigating postoperative pancreatic fistula(POPF)after gastrectomy,including studies measuring drain amylase content(D-AMY)as a predictive factor have been *** article reviews previous studies and looks to the future of measuring D-AMY in patients after *** causes of pancreatic fluid leakage are;the parenchymal and/or thermal injury to the pancreas,and blunt injury to the pancreas by compression and *** of D-AMY to predict POPF has become common in clinical practice after pancreatic surgery and was later extended to the gastric *** studies have reported associations between D-AMY and POPF after gastrectomy,and the high value of D-AMY on postoperative day(POD)1 was an independent risk *** improve both sensitivity and specificity,attempts have been made to enhance the predictive accuracy of factors on POD 1 as well as on POD 3 as combined *** several studies have shown a high predictive ability of POPF,it has not necessarily been exploited in clinical *** problems remain unresolved;ideal timing for measurement,optimal cut-off value,and means of intervention after *** clinical trial could be imperative in order to develop D-AMY measurement in common clinical practice for gastric surgery.

关键词： Gastric cancer Drain amylase Postoperative pancreatic fistula Pancreasrelated complications Gastrectomy Early prediction

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Acquiring non-parametric scattering phase function from a single image

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Computational Visual Media 2018年第4期4卷 323-331页

作者： Yuki Minetomo Hiroyuki Kubo Takuya Funatomi Mikio Shinya yasuhiro Mukaigawa Nara Institute of Science and Technology 8916-5 Takayama-choIkomaNara630-0192Japan. Toho University 2-2-1 MiyamaFunabashiChiba274- 8510Japan. Dwango CG Research KADOKAWA Hongo Bldg.5-24-5 HongoBunkyo-kuTokyo113-0033Japan.

Acquiring accurate scattering properties is important for rendering translucent materials. In particular, the phase function, which determines the distribution of scattering directions, plays a significant role in the appearance of a material. We propose a distinctive scattering theory that approximates the effect of single scattering to acquire the non-parametric phase function from a single image. Furthermore, in various experiments, we measured the phase functions from several real diluted media and rendered images of these materials to evaluate the effectiveness of our theory.

关键词： scattering phase function measurement rendering

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