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Optical near-field excitation using liquid crystals on nanostruc- tured photoreactive molecular thin films

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Science China(Physics,Mechanics & Astronomy) 2012年第8期55卷 1351-1355页

作者： OHDAIRA Yasuo SHINBO Kazunari BABA Akira KATO Keizo KANEKO Futao Graduate School of Science and Technology Niigata University 2-8050 Ikarashi Nishi-ku Niigata City Niigata 950-2181 Japan Center for Transdisciplinary Research Niigata University 2-8050 Ikarashi Nishi-ku Niigata City Niigata 950-2181 Japan

Optical near-field excitations were investigated on the basis of molecular alignment control of liquid crystals (LCs) on an optically rewritable nanostructure of photoreactive molecular thin films. Twisted nematic (TN) cells of LC molecules were constructed utilizing ITO substrates with 260 nm gratings of an azobenzene molecular thin film, fabricated using standing evanescent waves. The polarization changes of light transmitted through the TN cells, which were due to the alignment changes of LC molecules locally rubbed by the azobenzene nanogratings, were observed. Furthermore, we demonstrated local plasmon excitation of Au nanowires deposited on the azobenzene nanogratings using oblique vacuum evaporation, a phenomenon that produced strong anti-optical absorption spectra. The modulation of the local plasmon resonance in metallic nanowires decorated with LC molecules was confirmed.

关键词： optical near-field azobenzene molecular thin film liquid crystal optical polarization local plasmon excitation

New Triterpenes from Siyekucai (Ixeris chinensis)

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Chinese Chemical Letters 2006年第2期17卷 195-197页

作者： Shu Jun ZHANG Jin Lan WANG Qi Gang DENG Masayoshi ANDO Department of Chemistry and Engineering Qiqihar University Qiqihar 161006 Niigata University Ikarashi 2-8050 Niigata 950-2181 Japan

Three new triterpenes, 3β,21α-dihydroxylupen-18（19）-en （1）, 3β,25-dihydroxytirucalla- 7,23（24）-dien （2）, and 21α-hydroxy-19α-hydrogentaraxastero1-20（30）-en （3） were obtained from an ethyl acetate extract of the whole plant of Siyekucai （Ixeris chinensis）. The structures of 1-3 were determined by spectroscopic methods （EIMS, IR, 1D and 2D NMR）.

关键词： Ixeris chinensis trierpene 3β 21α-dihydroxylupen-18(19)-en (1) 3β 25-dihydroxy-tirucalla-7 23(24)-dien 21α-hydroxy-19α-hydrogentaraxastero1-20(30)-en.

Surface Grafting of Polymers onto Nano-Sized Particles in Solvent-Free Dry-System and in Ionic Liquid

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复旦学报（自然科学版） 2005年第5期44卷 835-836页

作者： Norio TSUBOKAWA Department of Material Science and Technology Niigata University Center for Transdisciplinary Research Niigata University 8050Ikarashi 2-nocho Niigata 950-2181 Japan

We have reported the grafting of various polymers onto the surface of inorganic nano-sized particles, such as silica, titanium oxide, and carbon black[1]. The polymer-grafted nano-sized particles are known to have excellent properties, such as a good dispersibility in solvents and polymer matrices[1,2]. However, scale-up production of polymer-grafted nano-sized particles was hardly achieved, because complicated procedures, such as centrifugation, filtration, and solvent extraction, are needed for the production of polymer-grafted nano-sized particles, and a lot of abolishing solvent comes out.

关键词：聚合体表面移植粒子纳米尺寸干燥系统

Direct phase modulating laser diode interferometer for in-process measurement using sinusoidal signal synchronized with the CCD camera's exposure time

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Direct phase modulating laser diode interferometer for in-pr...

Photonics Asia 2004;Sensors and Imaging

作者： Takamasa Suzuki Takamasa Masutomi Osami Sasaki Faculty of Engineering Niigata University 8050 ikarashi 2 Niigata 950-2181 Japan Faculty of Engineering Niigata University 8050 ikarashi 2 Niigata 950-2181 Japan Faculty of Engineering Niigata University 8050 ikarashi 2 Niigata 950-2181 Japan

A disturbance-free sinusoidal phase modulating laser diode interferometer using integrating bucket method is described. Several techniques make it suitable for use in the in-process measurement: the c

关键词： interferometers laser diodes integrating buckets charge-coupled devices sinusoidal phase modulation

CO_2 sequestration utilizing basic-oxygen furnace slag:Controlling factors,reaction mechanisms and V–Cr concerns

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Journal of Environmental Sciences 2016年第3期28卷 99-111页

作者： Tung-Hsin Su Huai-Jen Yang Yen-Hong Shau Eiichi Takazawa Yu-Chen Lee Department of Earth Sciences National Cheng-Kung UniversityTainan 70101Taiwan Department of Marine Biotechnology and Resources National Sun Yat-Sen UniversityKaohsiung 80424Taiwan Department of Geology Niigata University8050Ikarashi 2-no-choNishi-kuNiigata 950-2182Japan China Steel Corporation 1Chung-Kang Rd.Kaohsiung 81233Taiwan

Basic-oxygen furnace slag（BOF-slag） contains 〉35%CaO,a potential component for CO_*** this study,slag-water-CO_2 reaction experiments were conducted with the longest reaction duration extending to 96 hr under high CO_2 pressures of 100-300 kg/cm2 to optimize BOF-slag carbonation conditions,to address carbonation mechanisms,and to evaluate the extents of V and Cr release from slag *** slag carbonation degree generally reached the maximum values after 24 hr slag-water-CO_2 reaction and was controlled by slag particle size and reaction *** maximum carbonation degree of 71%was produced from the experiment using fine slag of〈0.5 mm under 100℃and a CO_2 pressure of 250 kg/cm^2 with a water/slag ratio of *** release from the slag to water was significantly enhanced（generally 〉2 orders） by slag *** contrast,slag carbonation did not promote chromium release until the reaction duration exceeded 24 ***,the water chromium content was generally at least an order lower than the vanadium concentration,which decreased when the reaction duration exceeded 24 ***,long reaction durations of 48-96 hr are proposed to reduce environmental impacts while keeping high carbonation *** textures and water compositions indicated that Mg-wustite,in addition to CaO-containing minerals,can also be ***,the conventional expression that only considered carbonation of the CaO-containing minerals undervalued the CO_2 sequestration capability of the BOF-slag by^20%.Therefore,the BOF-slag is a better CO_2 storage medium than that previously recognized.

关键词： Mineral CO_2 sequestration BOF-slag Carbonation

Quantitative classification of Camellia japonica and Camellia rusticana(Theaceae)based on leaf and flower morphology

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Plant Diversity 2021年第3期43卷 216-224页

作者： Harue Abe Hiroki Miura Yoshitaka Motonaga Center for Sustainable Agriculture and Forestry Faculty of AgricultureNiigata University94-2 KodaSadoNiigata952-2206Japan Aomori Prefectural Asamushi Aquarium 1-25 BabayamaAsamushiAomoriAomori039-3501Japan Faculty of Agriculture Niigata University8050 Ikarashi-ninochoNishi-kuNiigata950-2181Japan

In Japan,Camellia japonica and Camellia rusticana are naturally *** differences in their habitats and morphologies,they have been classified by various researchers as either varieties,subspecies,or *** taxonomic position of *** and *** remain unclear because morphological comparisons have been restricted to limited areas and quantitative data are *** grows in snowy places,unlike *** *** displays ornithophily,*** displays *** species have adapted to different growing environments and pollinators,which have altered the morphology of flowers and *** therefore quantitatively estimated the differentiation between these two taxa by comparing the morphologies of leaf hypodermis,flower form,petal color,and filament color in twenty *** findings allowed us to differentiate these two species by the presence or absence of a leaf *** also discovered an intermediate type of leaf hypodermis,which might also be caused by *** component analysis(PCA)indicated that the flower morphologies between these species were significantly *** petal and filament colors were also significantly *** quantitative analysis suggests that speciation caused by differences in both pollinators and environment is one of the factors involved in this *** findings in *** and *** help to explain speciation processes for other species as well.

关键词： Camellia japonica Camellia rusticana Ecological isolation Pollinator shift Pollination syndrome Reproductive isolation

Wide range two-dimensional small rotation-angle measurement by use of fringe projection

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Wide range two-dimensional small rotation-angle measurement ...

Photonics Asia 2004;Sensors and Imaging

作者： Takamasa Suzuki Takanori Endo John E.Greivenkamp Osami Sasaki Niigata University Faculty of Engineering 8050 ikarashi 2 Niigata 950-2181 JAPAN Niigata University Faculty of Engineering 8050 ikarashi 2 Niigata 950-2181 JAPAN University of Arizona Optical Sciences Center Tucson Arizona 85721 USA Niigata University Faculty of Engineering 8050 ikarashi 2 Niigata 950-2181 JAPAN

A system for two-dimensional small rotation-angle measurement is proposed and demonstrated. Because the measurement is not conducted by the interference but the fringe projection, it is basically robu

关键词： rotation-angle measurement,fringe projection,autocollimator

Sinusoidal wavelength-scanning interferometer using an acousto-optic tunable filter with double feedback control for real-time distance measurement

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Sinusoidal wavelength-scanning interferometer using an acous...

2008 International Conference on Optical Instruments and Technology

作者： Osami Sasaki Daiki Matsubara Takamasa Suzuki Faculty of Engineering Niigata University8050Ikarashi 2Niigata-shi 950-2181Japan

Optical path difference(OPD)and amplitude of a sinusoidal wavelength-scanning(SWS)are controlled with double feedback control system in an SWS interferometer,so that a ruler marking every wavelength and a ruler with scales smaller than a wavelength are *** two rulers enable us to measure an OPD longer than a *** acousto-optic tunable filter(AOTF)is adopted as a wavelength-scanning *** frequency of the SWS is 10 KHZ,and the measurement time required to reach a stable point of the control system is about *** measurement range is from 65μm to 190μm with the measurement error less than 4nm.

关键词： interferometer wavelength scanning feedback control distance measurement.

ENVIRONMENTAL COMPATIBILITY OF FLY ASH INCORPORTAED CONSTRUCTION MATERIALS

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ENVIRONMENTAL COMPATIBILITY OF FLY ASH INCORPORTAED CONSTRUC...

第五届水泥与混凝土国际会议

作者： M.Hisada T.Saeki S.Nagataki Department of Civil Engineering and Architecture Niigata University 8050Ikarashi 2-no-cho Niigata 950-2181Japan

The leaching of heavy metals, such as Cr (total chromium and Cr6+),Pb, Cd, Zn, Mn and so on, in fly ash cement mortars and cement-solidified fly ashes has been investigated by tank leaching and shaken extraction test methods;comparisons were made between the leachability of heavy metals under different pH conditions and of metals from specimens at different curing ages. In addition, a pH controlled shaken extraction test method was proposed. The results of this study mainly indicate that: (1) heavy metals do leach from the tested specimens;(2) compared with the tank leaching test,a shaken extraction test can extract more toxic heavy metals;(3) the leachability of some heavy metals is greatly dependent on leachant pH;and (4) increased leaching of both Cr and Cr6+ will occur when cement mortars have been carbonated.

关键词： leaching heavy metal cement fly ash environmental impact