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Journal of Wuhan University of Technology(Materials Science) 2008年第4期23卷 536-540页

作者： LIU Hongfang HUANG Li HUANG Zhuo QI Gongtai KEI Sanada yutaka harima Department of Chemistry Huazhong University of Science and Technology Wuhan 430074 China Changjiang River Scientific Research Institute Wuhan 430010 China Graduate School of Engineering Hiroshima University Kagamiyama 1-4-1 Higashi-Hiroshima 739-8527 Japan

Microspheres of conducting polymers poly N-methylaniline （PNMA） were successfully synthesized through oxidation of N-methylaniline without any template. The average diameter of the microspheres with a smooth surface was about 0.40 μm when 0.2 M N-methylanUine was oxidized with 0.2 M ammonium persulfate in 0.2 M of HClO4 solution. The size of microspheres can be controlled by changing reaction time and temperature. The acid concentration was critical for the formation of microspheres with smooth surfaces. The excellent antibacterial performance of PNMA in novolac epoxy coating to sulfate reducing bacteria was demonstrated. Moreover, in API media, PNMA inhibited growth of SRB and then reduced the corrosion rate of carbon steel remarkably.

关键词： microspheres conducting polymer chemical polymerization morphology sulfate reducing bacteria corrosion

一系列单硅烷-寡聚噻吩共聚高分子膜中电荷传导研究

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高等学校化学学报 2007年第7期28卷 1403-1407页

作者：蒋晓青播磨裕南京师范大学化学与环境科学学院南京210097 广岛大学工学研究科

研究了一系列由单硅烷和寡聚噻吩组成的共聚高分子膜(PSnT,n表示寡聚噻吩单元中噻吩环的个数)在较宽掺杂率范围内载流子的迁移率变化规律.结果表明,掺杂率极低(<0·2%)时各膜中的载流子迁移率接近,几乎不受n的影响;随着膜的掺杂率的增加... 详细信息

研究了一系列由单硅烷和寡聚噻吩组成的共聚高分子膜(PSnT,n表示寡聚噻吩单元中噻吩环的个数)在较宽掺杂率范围内载流子的迁移率变化规律.结果表明,掺杂率极低(<0·2%)时各膜中的载流子迁移率接近,几乎不受n的影响;随着膜的掺杂率的增加,各PSnT膜中的迁移率相继增大,n增大,迁移率在更低的掺杂率处开始增大,其增幅随着n的增加而增大.PS14T迁移率的增幅超过4个数量级,已与电化学合成的聚噻吩膜中观察到的迁移率增幅相当,表明此共聚物中的π-共轭长度已足以再现聚噻吩传导性能.

关键词：迁移率寡聚噻吩共聚物电荷传导掺杂

Synthesis of Soluble Polythiophene Partially Containing 3,4-Ethylenedioxythiophene and 3-Hexylthiophene by Polycondensation

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Open Journal of Polymer Chemistry 2014年第3期4卷 83-93页

作者： Ichiro Imae Hitoshi Sagawa Takahiro Mashima Kenji Komaguchi Yousuke Ooyama yutaka harima Department of Applied Chemistry Graduate School of Engineering Hiroshima University Higashi-Hiroshima Japan

A novel poly(quinquethiophene) partially containing 3,4-ethylenedioxythiophene (EDOT) and 3-hexylthiophene, poly(3,3 ''''-dihexyl-3',4',3''',4'''-diethylenedioxy-2,2':5',2'':5'',2''':5''',2''''-quinquethiophene), was synthesized by three types of polycondensations. Among them, direct C-H coupling reaction gave the polymer with the highest molecular weight. The resulting polymer was soluble in common organic solvents. Absorption and fluorescence spectra of the polymer showed a remarkable red-shift compared with the corresponding monomer due to the expansion of effective π-conjugation length.

关键词： Polycondensation Polythiophene Ethylenedioxythiophene Alkylthiophene Solubility

Multifunctional glycolipids as multi-targeting therapeutics for neural regeneration

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Neural Regeneration Research 2024年第4期19卷 707-708页

作者： yutaka Itokazu Department of Neuroscience and Regenerative Medicine Medical College of GeorgiaAugusta UniversityAugustaGAUSA

Many patients with neurodegenerative diseases,such as Alzheimer’s(AD)and Parkinson’s(PD)diseases suffer from disease progression without any satisfying clinical intervention,likely due to our lack of knowledge on how normal aging impacts the pathogenic mechanisms of these debilitating diseases.A growing body of literature has emerged in recent years that clearly demonstrates the involvement of glycolipids in the protein-oligomerization of neurodegenerative *** hypothesize that changes in glycolipids composition are a common mechanism underlying the shift from healthy brain aging to the neuropathological processes of neurodegenerative diseases.

关键词： lipids involvement diseases

Analysis of deformation mechanisms in magnesium single crystals using a dedicated four-point bending tester

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Journal of Magnesium and Alloys 2024年第5期12卷 1911-1917页

作者： yutaka Yoshida Rikuto Izawa Kenji Ohkubo Faculty of Engineering Kitami Institute of TechnologyKoen-choKitamiHokkaido 090-8507Japan Graduate student Department of Mechanical and Electrical EngineeringKitami Institute of TechnologyKoen-choKitamiHokkaido 090-8507Japan Center for Advanced Research of Materials Faculty of EngineeringHokkaido UniversityKita-kuSapproHokkaido 060-8628Japan Kyokuto Kaihatsu Kogyo Co. Ltd.AwajiChuohuOosakaOosaka 541-0047Japan

In this study,we explored the deformation mechanisms of Mg single crystals using a combination of scanning electron microscopy and electron backscattered diffraction in conjunction with a dedicated four-point bending *** prepared two single-crystal samples,oriented along theanddirections,to assess the mechanisms of deformation when the initial basal slip was *** thesample,the primary{1012}twin(T1)was confirmed along thedirection of the sample on the compression side with an increase in bending *** thesample,T1 and the secondary twin(T2)were confirmed to be along thedirection,with an orientation of±60°with respect to the bending stress direction,and their direction matched with(0001)in T1 and *** result implies that crystallographically,the basal slip occurs *** addition,thesample showed the double twin in T1 on the compression side and the tertiary twin along thedirection on the tension *** results demonstrated that the maximum bending stress and displacement changed significantly under the bend loading because the deformation mechanisms were different for these single ***,the correlation between bending behavior and twin orientation was determined,which would be helpful for optimizing the bending properties of Mg-based materials.

关键词： Four-point bending Magnesium single crystal Twinning Basal slip Scanning electron microscopy Electron backscatter diffraction

Next-generation regenerative therapy for ischemic stroke using peripheral blood mononuclear cells

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Neural Regeneration Research 2024年第11期19卷 2341-2342页

作者： Masato Kanazawa Itaru Ninomiya yutaka Otsu Masahiro Hatakeyama Department of Neurology Brain Research InstituteNiigata UniversityNiigataJapan

Stroke is the second leading cause of death and the third leading cause of disability worldwide after heart *** predict that stroke deaths and permanent disabilities will increase worldwide by the year ***-target therapies may be insufficient,because ischemic cerebral injury involves several ***-mediated therapies are ideal,because they target multiple cell types to enhance protection and recovery.

关键词： ischemic death cerebral

Comment on:Recurrence after spontaneous separation of epiretinal membrane in a young woman:a case report

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International Journal of Ophthalmology(English edition) 2024年第4期17卷 783-784页

作者： Yusuke Kameda yutaka Kaneko Karin Ishinabe Nichika Fukuoka Yotsuya-sanchome Ekimae Eye Clinic Tokyo 160-0004Japan Department of Ophthalmology and Visual Sciences Yamagata University Faculty of MedicineYamagata 990-9585Japan

Dear Editor,Herein,we provide a commentary on the recently published article by Zeng QZ and Yu WZ[1].This case report provides interesting novel insights into the recurrence of epiretinal membrane(ERM)following self-separation in a young *** addition to the study,we have been investigating spontaneous ERM release for many years and have recently published a related paper[2].

关键词： separation young release

Male Morphological Dimorphism in the Genji Firefly Nipponoluciola cruciata in Central Japan

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Advances in Entomology 2024年第3期12卷 203-209页

作者： yutaka Iguchi Laboratory of Biology Okaya Japan

The Japanese Genji firefly Nipponoluciola cruciata is famous for geographic variation in flash pattern. Such geographic variation has also been well studied in terms of ecology and molecular phylogeny. However, there are very few studies on geographic variation in morphology of this species. This study focused on morphological characteristics of males of this species in Yamanashi and Gunma Prefectures separated by the Kanto Mountains in central Japan. Previous studies have shown that this species in the two prefectures exhibits different genetic features as well as different flash patterns. This study aimed to explore morphological characteristics of males of this species and performed multivariate analysis using measurements previously published in the literature. As a result, allometric analysis between body length and elytra width suggested that this species exhibits different allometric patterns between the two prefectures. Moreover, cluster analysis of measurements of genitalia suggested that this species is completely separated into two different groups between the two prefectures. These results suggest the importance of further morphological studies to clarify the divergence of this species.

关键词： Male Dimorphism Allometriy Cluster Gunma Yamanashi

Change Point Analysis to Detect the Effect of Pruning Severity on Tree Growth

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Open Journal of Forestry 2024年第1期14卷 67-73页

作者： yutaka Iguchi Laboratory of Biology Okaya Japan

The effect of pruning severity on tree growth was analyzed by change point detection using segmented regression. The present study applied this analysis to a well-known published data set including diameter growth response, tree age, pruning severity and pretreatment crown size. First, multiple regression analysis was performed to assess the effect of tree age, pruning severity and pretreatment crown size on diameter growth response. Next, segmented regression analysis was performed to assess the effect of pruning severity on diameter growth response. The results of the multiple regression showed that diameter growth response was significantly influenced by pruning severity and pretreatment crown size. The results of the segmented regression showed that in the whole data set, an abrupt change toward a decrease in diameter growth response was detected at 25% of the live crown removed. However, in the group of fully crowned and open-grown, diameter growth response continuously decreased with increasing pruning severity with no significant abrupt change, whereas in the group of 70% - 90% live crown, diameter growth response did not significantly decrease up to the break point (53% crown removed) and then abruptly decreased. This may be the first study to show the numerical evaluation of the effect of pruning severity on tree growth by change point analysis.

关键词： Regression Analysis Crown Removal Limit Tree Growth Pretreatment Abrupt Change

Geographic Differences in Allometric Patterns of Males of the Japanese Firefly Luciola parvula

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Advances in Entomology 2024年第1期12卷 18-23页

作者： yutaka Iguchi Laboratory of Biology Okaya Japan

It has been well known for many years that males of Luciola parvula (Coleoptera, Lampyridae) have two morphs, namely small and large morphs in Japan. This article performed a statistical reanalysis of their morphological measurements based on previously published data and compared them. As a result, the two morphs were found to have different allometric patterns in the Hakone and Nagano areas, Japan. In Hakone, the relationships between their pronotum width and length were expressed by a common allometric line and a shift in location along the line. However, in Nagano, the relationships between their pronotum width and body length were expressed by two parallel allometric lines (a common slope and different intercepts). The allometric pattern of males of this species may vary among different parts of the body or among different areas. Therefore, this article recommends future studies to measure the same parts of the body as previous studies to clarify geographic variation in allometric relationships.

关键词： Body Size Male Dimorphism Allometric Pattern Hakone Nagano