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Manipulation of Charge-Transfer States by Molecular Design:Perspective from“Dynamic Exciton”

Accounts of Materials Research 2021年第7期2卷 501-514页

作者： Hiroshi Imahori yasuhiro kobori Hironori Kaji Department of Molecular Engineering Graduate School of EngineeringKyoto UniversityNishikyokuKyoto 615-8510Japan Institute for Integrated Cell-Material Sciences(WPI-iCeMS) Kyoto UniversitySakyo-kuKyoto 606-8501Japan Molecular Photoscience Research Center and Department of Chemistry Graduate School of ScienceKobe UniversityNada-kuKobe 657-8501Japan Institute for Chemical Research Kyoto UniversityUjiKyoto 611-0011Japan

CONSPECTUS:“Dynamic exciton”,an umbrella term concept in photochemistry,plays an important role in nature,science,and technology,especially in photoinduced and electrically induced electron transfer(ET)between a donor(D)and an acceptor(A).Typically,an exciton in molecular D−A systems is considered a locally excited(LE)state of a donor(D*)or an acceptor(A*)molecule,but let us extend the terminology of“exciton”to an integrated class of LE,charge-transfer(CT),and charge-separated(CS)*** degree of CT(0−100%),spin multiplicity,and D−A interaction(i.e.,electronic coupling)are pivotal factors in the“exciton”.Another important aspect of the“exciton”is strongly related to the“dynamic”aspect of the“exciton”by movement of atomic nuclei(i.e.,vibration,rotation,and fluctuation)and their collective motions controlling behaviors of electrons and spins by the passage of *** concept of“dynamic exciton”should cover a wide variety of the photochemical phenomena that are all essential for the energy conversion devices and processes including various kinds of living *** these,a huge amount of the nuclear motional modes may cooperatively be entangled to electronic ***,the idea behind“dynamic exciton”includes usage of the cooperation between nuclear motions and the spin−orbital,as electron−phonon coupling for innovative designs of the energy conversion materials and *** this,it is particularly important to examine how this wide variety of the motions plays roles on electronic couplings,intermediate geometries and mobilities,exciton energies,CT characters,and so *** draw researchers’attention to this aspect of the vibronic effect,like the entropy role by collective movement of side chains of the conjugated polymer to modulate the electronic coupling time-dependently at the charge delocalization and dissociation,which is reinforced three-dimensionally at the D/A domain interface of organic photovoltaics(OPVs).In addition,to realize the ultimate high

关键词： excited vibrational collective

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How are multiple satellites seen from the ground? Relative apparent motion and formation stabilization

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Astrodynamics 2024年第1期8卷 121-134页

作者： Kenta Nakajima yasuhiro Yoshimura Hongru Chen Toshiya Hanada Department of Aeronautics and Astronautics Kyushu University744 Motooka Nishi-kuFukuoka819-0395Japan

This paper answers how multiple satellites are seen from the ground. This question is inspired by space-advertising, a public exhibition in the night sky using a dot matrix of satellites that are bright enough to be seen by the naked eye. Thus, it is important for space advertisement that the specific dot matrix is seen. Moreover, the stability of the dot matrix during a visible span is very valuable. To stabilize the dot matrix, this study formulates an apparent position of a dot from a representative dot seen from the ground. The formulation, linear functions of a set of relative orbital elements, reveals the appearance of the dot matrix. The proposed relative variable in the formulation drives the instability of the dot matrix, thereby revealing an initial stable configuration of deputies from a chief. The arbitrary dot matrix designed using the configuration is stable even at low elevations without orbital control during the visible span.

关键词： formation flying relative motion stabilization astrodynamics multi-apparent motions space advertisement

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Liver biopsy in the post-hepatitis C virus era in Japan

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World Journal of Gastroenterology 2024年第14期30卷 1949-1957页

作者： Yoshihiro Ikura Takako Okubo yasuhiro Sakai Department of Pathology Takatsuki General HospitalTakatsuki 569-1192Osaka PrefectureJapan Department of Pathology Kansai Medical University Medical CenterMoriguchi 570-8507Japan

In Japan,liver biopsies were previously crucial in evaluating the severity of hepatitis caused by the hepatitis C virus(HCV)and diagnosing HCV-related hepatocellular carcinoma(HCC).However,due to the development of effective antiviral treatments and advanced imaging,the necessity for biopsies has significantly *** change has resulted in fewer chances for diagnosing liver disease,causing many general pathologists to feel less confident in making liver biopsy *** article provides a comprehensive overview of the challenges and potential solutions related to liver biopsies in ***,it highlights the importance of considering steatotic liver diseases as independent conditions that can coexist with other liver diseases due to their increasing ***,it emphasizes the need to avoid hasty assumptions of HCC in nodular lesions,because clinically diagnosable HCCs are not targets for ***,the importance of diagnosing hepatic immune-related adverse events caused by immune checkpoint inhibitors is increasing due to the anticipated widespread use of these *** conclusion,pathologists should be attuned to the changing landscape of liver diseases and approach liver biopsies with care and attention to detail.

关键词： Liver biopsy Alteration Post-hepatitis C virus era Steatotic liver disease Hepatic tumors Immune checkpoint inhibitors

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Geomorphological evidence inconvenient for the antecedent rivers of the Arun and Tista across the Himalayan range

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Journal of Mountain Science 2024年第9期21卷 3001-3017页

作者： NAKATA Takashi KUMAHARA yasuhiro NAIK Sambit Prasanajit SAKAI Harutaka Graduate School of Humanities and Social Sciences Hiroshima UniversityHigashi-Hiroshima 739-8522Japan Active Fault and Earthquake Hazard Mitigation Research Center Pukyong National UniversityBusan 48513South Korea Department of Petroleum Engineering and Earth Sciences University of Petroleum and Energy StudiesDehradun 248007India Graduate School of Science Kyoto UniversityKyoto 606-8502Japan

The Arun and Tista Rivers,which flow across the Himalayas,are commonly known as antecedent valleys that overcame the rapid uplift of the Higher Himalayan *** clarify whether the idea of antecedent rivers is acceptable,we investigated the geomorphology of the Himalayas between eastern Nepal and Bhutan *** southern part of Tibetan Plateau,extending across the Himalayas as tectonically un-deformed glaciated terrain named as'Tibetan Corridor,'does not suggest the regional uplift of the Higher *** 8,000-m class mountains of Everest,Makalu,and Kanchenjunga are isolated residual peaks on the glaciated terrain composed of mountain peaks of 4,000–6,000 m *** Tibetan glaciers commonly beheaded by Himalayan glaciers along the great watershed of the Himalayas suggest the expansion of Himalayan river drainage by *** the narrow upstream regions of the Arun and Tista Rivers with less precipitation behind the range,it is hard to collect enough water for the power of down-cutting their channels against the uplifting *** fission track ages of the Higher Himalayan Crystalline Nappe suggest that the Himalayas attained their present altitude by 11–10 Ma,and the Arun and Tista Rivers formed deep gorges across the Himalayas by headward erosion.

关键词： Himalaya Antecedent river Geomorphology AW3D30 DSM Glacier piracy

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Geomorphological evidence inconvenient for the antecedent rivers of the Arun and Tista across the Himalayan range

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Journal of Mountain Science 2024年第09期 3001-3017页

作者： NAKATA Takashi KUMAHARA yasuhiro NAIK Sambit Prasanajit SAKAI Harutaka Graduate School of Humanities and Social Sciences Hiroshima University Active Fault and Earthquake Hazard Mitigation Research Center Pukyong National University Department of Petroleum Engineering and Earth Sciences University of Petroleum and Energy Studies Graduate School of Science Kyoto University

The Arun and Tista Rivers, which flow across the Himalayas, are commonly known as antecedent valleys that overcame the rapid uplift of the Higher Himalayan ranges. To clarify whether the idea of antecedent rivers is acceptable, we investigated the geomorphology of the Himalayas between eastern Nepal and Bhutan Himalayas. The southern part of Tibetan Plateau, extending across the Himalayas as tectonically un-deformed glaciated terrain named as 'Tibetan Corridor,' does not suggest the regional uplift of the Higher Himalayas. The 8,000-m class mountains of Everest, Makalu, and Kanchenjunga are isolated residual peaks on the glaciated terrain composed of mountain peaks of 4,000–6,000 m high. The Tibetan glaciers commonly beheaded by Himalayan glaciers along the great watershed of the Himalayas suggest the expansion of Himalayan river drainage by glaciation. For the narrow upstream regions of the Arun and Tista Rivers with less precipitation behind the range, it is hard to collect enough water for the power of down-cutting their channels against the uplifting Himalayas. The fission track ages of the Higher Himalayan Crystalline Nappe suggest that the Himalayas attained their present altitude by 11–10 Ma, and the Arun and Tista Rivers formed deep gorges across the Himalayas by headward erosion.

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Mechanocatalysis of CO to CO_(2)on TiO_(2)surface controlled at atomic scale

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Nano Research 2024年第7期17卷 5826-5834页

作者： Yuuki Adachi Robert Turanský Ján Brndiar Kamil Tokár Qiang Zhu Huan Fei Wen yasuhiro Sugawara IvanŠtich Yan Jun Li Department of Applied Physics Osaka University2-1 YamadaokaSuitaOsaka 565-0871Japan Institute of Physics Slovak Academy of SciencesBratislava 84511Slovakia Institute of Informatics Slovak Academy of SciencesBratislava 84507Slovakia Faculty of Natural Sciences University of Ss.Cyril and MethodiusTrnava 91701Slovakia Key Laboratory of Instrumentation Science and Dynamic Measurement School of Instrument and ElectronicsNorth University of ChinaTaiyuan 030051China

The common ways to activate a chemical reaction are by heat,electric current,or ***,mechanochemistry,where the chemical reaction is activated by applied mechanical force,is less common and only poorly understood at the atomic *** we report a tip-induced activation of chemical reaction of carbon monoxide to dioxide on oxidized rutile TiO_(2)(110)*** activation is studied by atomic force microscopy,Kelvin probe force microscopy under ultrahigh-vacuum and liquid nitrogen temperature conditions,and density functional theory(DFT)*** reaction is inferred from hysteretic behavior of frequency shift signal further supported by vector force mapping of vertical and lateral forces needed to trigger the chemical reaction with torque motion of carbon monoxide towards an oxygen *** reaction is found to proceed stochastically at very small tip-sample ***,the local contact potential difference reveals the atomic-scale charge redistribution in the reactants required to unlock the *** results open up new insights into the mechanochemistry on metal oxide surfaces at the atomic scale.

关键词： atomic resolution mechanochemistry atomic force microscopy Kelvin probe force microscopy density functional theory(DFT)simulation CO oxidation catalysis rutile TiO_(2)surface

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Rational Engineering of Secondary Metabolic Pathways in a Heterologous Host to Enable the Biosynthesis of Hibarimicin Derivatives with Enhanced Anti-Melanomic Activity

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Engineering 2024年第7期38卷 113-123页

作者： Xiangyang Liu Fei-Peng Zhao Tian Tian Wei-Chen Wang Zaizhou Liu Qiang Zhou Xian-Feng Hou Jing Wang Wenli Guo Shuangjun Lin yasuhiro Igarashi Gong-Li Tang State Key Laboratory of Chemical Biology Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of SciencesShanghai 200032China School of Chemistry and Materials Science Hangzhou Institute for Advanced StudyUniversity of Chinese Academy of SciencesHangzhou 310024China State Key Laboratory of Microbial Metabolism&Joint International Research Laboratory on Metabolic and Developmental Sciences School of Life Sciences and BiotechnologyShanghai Jiao Tong UniversityShanghai 200240China Biotechnology Research Center Toyama Prefectural UniversityImizu 939-0398Japan

A 61-kb biosynthetic gene cluster(BGC),which is accountable for the biosynthesis of hibarimicin(HBM)B from Microbispora rosea *** TP-A0121,was heterologously expressed in Streptomyces coelicolor M1154,which generated a trace of the target products but accumulated a large amount of shunt *** on rational analysis of the relevant secondary metabolism,directed engineering of the biosynthetic pathways resulted in the high production of HBM B,as well as new HBM derivates with improved antitumor *** results not only establish a biosynthetic system to effectively synthesize HBMs-a class of the largest and most complex Type-Ⅱpolyketides,with a unique pseudo-dimeric structure-but also set the stage for further engineering and deep investigation of this complex biosynthetic pathway toward potent anticancer drugs.

关键词： Hibarimicin Biosynthesis Heterologous expression Biosynthetic gene cluster Rational engineering Type-II polyketide

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SPERA Hydrogen System^(TM)by LOHC-MCH Method for Massive Hydrogen Storage and Transportation

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Journal of Environmental Science and Engineering(A) 2024年第2期13卷 50-60页

作者： Yoshimi Okada Kaji Naohiro Osamu Ikeda Kenichi Imagawa Hironori Kawai Masashi Nagai yasuhiro Inoue Frontier Business Division Chiyoda Corporation4-6-2 Minatomirai Nishi-kuYokohama 2208765Japan Hydrogen Business Department Chiyoda Corporation4-6-2 Minatomirai Nishi-kuYokohama 2208765Japan R&D Center Chiyoda Corporation3-13 Moriya-cho Kanagawa-kuYokohama 2208765Japan Technology Development Department Chiyoda Corporation4-6-2 Minatomirai Nishi-kuYokohama 2208765Japan

Expanding the hydrogen energy utilization is essential for decarbonization,and the commercialization of hydrogen energy carrier systems that can“store”and“transport”hydrogen in a large scale is *** organic chemical hydride method incorporates hydrogen atoms into the molecular structure of a LOHC(Liquid Organic Hydrogen Carrier)to store and transport hydrogen in a liquid state under normal temperature and pressure,and is a highly safe method with low business *** has been developing the technology since 2002,completed a pilot demonstration in 2014 and named it the SPERA Hydrogen^(TM) System,and successfully completed an international supply chain demonstration that transports hydrogen from Brunei to Japan in a large scale in 2020,moving to the commercialization ***,Chiyoda is conducting feasibility studies with a number of domestic and foreign companies with the aim of commercializing the system as soon as *** this paper,outline,features,development status and our efforts in commercialization of SPERA HydrogenTM System are introduced.

关键词： Hydrogen carrier LOHC Methylcyclohexane MCH toluene

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Two-layer cold storage method for pancreas and islet cell transplantation

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World Journal of Gastroenterology 2010年第26期16卷 3235-3238页

作者： yasuhiro Fujino Department of Surgery Hyogo Cancer Center Akashi 673-8558 Japan

The two-layer cold storage method (TLM) was f irst reported in 1988, consisting of a perfluorochemical (PFC) and initially Euro-Collins' solution, which was later replaced by University of Wisconsin solution (UW). PFC is a biologically inert liquid and acts as an oxygen-supplying agent. A pancreas preserved using the TLM is oxygenated through the PFC and substrates are supplied by the UW solution. This allows the pancreas preserved using the TLM to generate adenosine triphosphate during storage, prolonging the preservation time. In a canine model, the TLM was shown to repair and resuscitate warm ischemically damaged pancreata during preservation, improve pancreas graft survival after transplantation, and also improve the islet yield after isolation. Clinical trials using the TLM in pancreas preservation before whole-pancreas transplantation and islet isolation have shown promising outcomes. We describe the role of the TLM in pancreas and islet transplantation.

关键词： Two-layer method Pancreas preservation Pancreas transplantation Islet transplantation Perfluorochemical

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Microbiota in the stomach and application of probiotics to gastroduodenal diseases

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World Journal of Gastroenterology 2022年第47期28卷 6702-6715页

作者： yasuhiro Koga Japanese Society for Probiotic Science Isehara 259-1143Japan

The stomach is a hostile environment for most microbes because strong gastric acid kills indigenous ***,the mass of indigenous microbes detected by traditional culturing method in a highly acidic stomach is reported to be very ***,in a stomach with less acidity due to atrophic changes of the gastric mucosa,the number of live gastric microbiota dramatically increases and their composition changes.A probiotic is defined as a live microorganism that,when administered in adequate amounts,confers a health benefit on the *** administration of probiotics to the stomach has thus far been considered impractical,mainly due to the strong acidity in the *** identification of candidate probiotic strains with sufficient resistance to acidity and the ability to achieve close proximity to the gastric mucosa could enable the application of probiotics to the *** utilization of probiotics alone for Helicobacter pylori(***)infection significantly improves gastric mucosal inflammation and decreases the density of *** on the mucosa,although complete eradication of *** has not yet been *** use of probiotics in combination with antimicrobial agents significantly increases the *** eradication rate,especially when the *** strains are resistant to antimicrobial *** *** has been considered the most important pathogenic bacterium for the development of gastric cancer,bacteria other than *** are also suggested to be causative pathogens that promote the development of gastric cancer,even after the eradication of *** *** Gram-negative bacteria in the stomach with weak acidity accompanying atrophic gastritis may perpetuate gastric mucosal inflammation and accelerate carcinogenic progression,even after *** *** restore the acidity in this stomach environment and may therefore prevent the development of gastric cancer by termination of Gram-negative ba

关键词： Stomach Microbiota Probiotics Helicobacter pylori Post-eradication gastric cancers Functional dyspepsia

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