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Influence on Visibility Due to Differences of Guide Wire Movement―Visual &Physical Evaluations

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Open Journal of Applied Sciences 2020年第10期10卷 577-591页

作者： hisaya sato Daisuke Kittaka Miwa Ohsawa Kyoichi Kato Graduate School of Health Sciences Showa University Tokyo Japan Department of Radiological Technology Showa University Hospital Tokyo Japan Department of Radiological Technology Showa University Fujigaoka Hospital Yokohama Japan Department of Unification Radiological Technology Showa University Tokyo Japan

The visibility of moving images during cardiac catheterization and treatment may be reduced by a number of factors. First, it involves multiple movements that occur simultaneously, such as the movements due to the heart beat and movement of the guide wire used during the treatment. There is also the influence of the X-ray dose on the image quality in the X-ray output. If X-rays are irradiated onto moving objects such as a guide wire moving during treatment of the heart, cardiac catheterization may be displaced to the next image recorded even when an insufficient X-ray dose has been irradiated because the imaged object is moving during the time the X-rays are emitted (pulse width). If the X-ray dose planned to be irradiated to the target is low, there is also the possibility that noise will appear in the image, and the imaged object may be lost in noise and visibility be reduced. For this reason, we conducted basic research into how changes in the speed of rotation of guide wires affect visibility when wires are positioned horizontally and vertically, using a dynamic phantom and recorded X-ray moving images. The purpose of this study is to elucidate whether the deterioration in the visibility is affected by the X-ray dose, the orientation or movement of a guide wire, or caused by other conditions, in order to contribute to improving the visibility in the X-ray moving images. The results showed a lower visual evaluation only in the vertical direction at the more rapid movement here, but this did not result in significant changes in the physical evaluation. This suggests that the structure and characteristics of the human eyes would be involved, as human vision is stronger with lateral movements and weaker with vertical movements due to the arrangement of the human eyes, side by side. Findings from this basic study can be utilized to improve the visibility in the X-ray moving images by paying attention to the observation environment of the observer of the X-ray moving

关键词： X-Ray Moving Images Visibility Human Vision Guide Wire

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主链型三苯胺基聚合物的合成

北京理工大学学报 2000年第6期20卷 768-772页

作者：王晓青罗运军谭惠民佐藤寿弥北京理工大学化工与材料学院北京100081 东京农工大学工学部应用化学科

通过 4 -叔丁基三苯胺与 1,3-二异丙烯基苯的加成反应 ,合成新颖的主链型三苯胺基聚合物 ,讨论反应温度、催化剂浓度以及反应单体浓度对产物的相对分子质量和产率的影响 ,并对所合成的聚合物进行结构和性能的表征 .实验结果表明 ,这一... 详细信息

通过 4 -叔丁基三苯胺与 1,3-二异丙烯基苯的加成反应 ,合成新颖的主链型三苯胺基聚合物 ,讨论反应温度、催化剂浓度以及反应单体浓度对产物的相对分子质量和产率的影响 ,并对所合成的聚合物进行结构和性能的表征 .实验结果表明 ,这一聚合物具有良好的溶解性 ,高的玻璃化转变温度 ,而且 4 -叔丁基三苯胺在引入聚合物主链后仍然保持了其光学及电化学活性 ,作为空穴传输材料具有潜在应用价值 .

关键词：空穴传输材料加成反应 4-叔丁基三苯胺 1,3-二异丙烯基苯

Factors hindering the degradation of pharmaceuticals from human urine in an iron-activated persulfate system

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Journal of Environmental Sciences 2024年第1期135卷 130-148页

作者： Yiruiwen Xie Dao Guan Yangfan Deng Yugo sato Yu Luo Guanghao Chen Department of Civil and Environmental Engineering Water Technology LabHong Kong Branch of Chinese National Engineering Research Center for Control&Treatment of Heavy Metal PollutionThe Hong Kong University of Science&TechnologyHong Kong 999077China

This study investigated the degradation of clofibric acid(CFA),bezafibrate(BZF),and sulfamethoxazole(SMX)in synthetic human urine using a novel mesoporous iron powderactivated persulfate system(mFe-PS system),and identified the factors limiting their degradation in synthetic human urine.A kinetic model was established to expose the radical production in various reaction conditions,and experiments were conducted to verify the modeling *** the phosphate-containing mFe-PS system,the 120 min removal efficiency of CFA decreased from 95.1%to 76.6%as the phosphate concentration increased from 0.32 to 6.45 mmol/L,but recovered to 90.5%when phosphate concentration increased to 16.10 mmol/***,the increased concentration of phosphate from 0.32 to 16.10mmol/L reduced the BZF degradation efficacy from 91.5%to 79.0%,whereas SMX removal improved from 37.3%to 62.9%.The m Fe-PS system containing(bi)carbonate,from 4.20 to166.70 mmol/L,reduced CFA and BZF removal efficiencies from 100%to 76.8%and 80.4%,respectively,and SMX from 83.5%to 56.7%within a 120-min reaction *** addition,alkaline conditions(pH≥8.0)inhibited CFA and BZF degradations,while nonacidic pH(pH≥7.0)remarkably inhibited SMX *** of the kinetic model indicated the formation of phosphate(H_(2)PO_(4)^(·)/HPO_(4)^(·-))and/or carbonate radicals(CO_(3)^(·-))could limit pharmaceutical *** transformation products(TPs)of the pharmaceuticals revealed more incompletely oxidized TPs occurred in the phosphate-and(bi)carbonate-containing m Fe-PS systems,and indicated that H_(2)PO_(4)^(·)/HPO_(4)^(·-)mainly degraded pharmaceuticals via a benzene ring-opening reaction while CO_(3)^(·-)preferentially oxidized pharmaceuticals via a hydroxylation reaction.

关键词： Pharmaceutical degradation Human urine Iron-activated persulfate system Phosphate radicals Carbonate radicals Transformation products

New aspects of a small GTPase RAB35 in brain development and function

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Neural Regeneration Research 2025年第7期20卷 1971-1980页

作者： Ikuko Maejima Ken sato Laboratory of Molecular Traffic Institute for Molecular and Cellular RegulationGunma UniversityMaebashiJapan

In eukaryotic cells,organelles in the secretory,lysosomal,and endocytic pathways actively exchange biological materials with each other through intracellular membrane trafficking,which is the process of transporting the cargo of proteins,lipids,and other molecules to appropriate compartments via transport vesicles or *** processes are strictly regulated by various small GTPases such as the RAS-like in rat brain(RAB)protein family,which is the largest subfamily of the RAS *** of membrane trafficking affects tissue homeostasis and leads to a wide range of diseases,including neurological disorders and neurodegenerative ***,it is important to understand the physiological and pathological roles of RAB proteins in brain ***35,a member of the RAB family,is an evolutionarily conserved protein in metazoans.A wide range of studies using cultured mammalian cells and model organisms have revealed that RAB35 mediates various processes such as cytokinesis,endocytic recycling,actin bundling,and cell ***35 is also involved in neurite outgrowth and turnover of synaptic *** generated brain-specific Rab35 knockout mice to study the physiological roles of RAB35 in brain development and *** mice exhibited defects in anxiety-related behaviors and spatial ***,RAB35 is required for the precise positioning of pyramidal neurons during hippocampal development,and thereby for normal hippocampal *** contrast,layer formation in the cerebral cortex occurred superficially,even in the absence of RAB35,suggesting a predominant role for RAB35 in hippocampal development rather than in cerebral cortex *** studies have suggested an association between RAB35 and neurodegenerative diseases,including Parkinson's disease and Alzheimer's *** this review,we provide an overview of the current understanding of subcellular functions of *** also provide insights into the phys

关键词： endocytosis endosomes hippocampal development neurodegenerative diseases RAB35

Wild Gibbon Optimization Algorithm

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Computers, Materials & Continua 2024年第7期80卷 1203-1233页

作者： Jia Guo JinWang Ke Yan Qiankun Zuo Ruiheng Li Zhou He Dong Wang Yuji sato Hubei Key Laboratory of Digital Finance Innovation Hubei University of EconomicsWuhan430205China School of Information Engineering Hubei University of EconomicsWuhan430205China China Construction Third Engineering Bureau Installation Engineering Co. Ltd.Wuhan430074China Hubei Internet Finance Information Engineering Technology Research Center Hubei University of EconomicsWuhan430205China College of Informatics Huazhong Agricultural UniversityWuhan430070China Faculty of Computer and Information Sciences Hosei UniversityTokyo184-8584Japan

Complex optimization problems hold broad significance across numerous fields and ***,as the dimensionality of such problems increases,issues like the curse of dimensionality and local optima trapping also *** address these challenges,this paper proposes a novel Wild Gibbon Optimization Algorithm(WGOA)based on an analysis of wild gibbon population *** two strategies:community search and community *** community search strategy facilitates information exchange between two gibbon families,generating multiple candidate solutions to enhance algorithm ***,the community competition strategy reselects leaders for the population after each iteration,thus enhancing algorithm *** assess the algorithm’s performance,CEC2017 and CEC2022 are chosen as test *** the CEC2017 test suite,WGOA secures first place in 10 *** the CEC2022 benchmark functions,WGOA obtained the first rank in 5 *** ultimate experimental findings demonstrate that theWildGibbonOptimization Algorithm outperforms others in tested *** underscores the strong robustness and stability of the gibbonalgorithm in tackling complex single-objective optimization problems.

关键词： Complex optimization wild gibbon optimization algorithm community search community competition

Porphyrin/Fullerene Porous Molecular Cocrystal Featuring a Robust One-Dimensional Channel

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Precision Chemistry 2024年第9期2卷 480-487页

作者： Nobuhiro sato Ryojun Toyoda Tetsu sato Zi Lang Goo Shinya Takaishi Koki Chida Takeharu Yoshii Hirotomo Nishihara Kunihisa Sugimoto Ryota Sakamoto Department of Chemistry Graduate School of ScienceTohoku UniversitySendai 980-8578Japan Department of Chemistry Kindai UniversityOsaka 577-8502Japan Institute of Multidisciplinary Research for Advanced Materials Tohoku UniversitySendaiMiyagi 980-8577Japan Institute of Multidisciplinary Research for Advanced Materials and Advanced Institute for Materials Research(WPI-AIMR) Tohoku UniversitySendaiMiyagi 980-8577Japan Division for the Establishment of Frontier Sciences of Organization for Advanced Studies Tohoku UniversitySendai 980-8577Japan

Microporous molecular crystals are promising materials because of their designable porosity as well as their resistance to chemical and other ***,we developed microporous molecular cocrystals by taking advantage of the specific interactions between porphyrins and fullerene ***-crystal X-ray diffraction analysis revealed that one nickel(II)porphyrin interacts with two fullerene molecules to form a two-dimensional honeycomb network with an eclipsed stacking mode,providing onedimensional void *** the pores were activated by heat treatment or mechanical grinding,the prepared cocrystal can incorporate gas and solvent molecules reversibly while maintaining its ***,it retained its single-crystallinity in the presence of water,acid−base,or high *** findings in this study expand the availability of molecular crystals based on intermolecular interactions as porous materials,which are expected to work under conditions that have not been applicable to other molecule-based porous materials.

关键词： Microporous molecular crystal intermolecular interaction gas adsorption chemical stability high-pressure resistance

Inertial mixing of acoustically levitated droplets for time-lapse protein crystallography

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Droplet 2024年第3期3卷 91-101页

作者： Soichiro Tsujino Yohei sato Shichao Jia Michal W.Kepa Sofia Trampari Takashi Tomizaki Division of Biology and Chemistry Paul Scherrer InstitutVilligenSwitzerland Swiss Nanoscience Institute University of BaselBaselSwitzerland Division Scientific Computing Theory and DataPaul Scherrer InstitutVilligenSwitzerland Biozentrum University of BaselBaselSwitzerland Photon Science Division Paul Scherrer InstitutVilligenSwitzerland

Varying the chemical consistency of acoustically levitated droplets opens up an in situ study of chemical and biochemical reactions in small ***,the opti-mization of the mixing time and the minimization of the positional instability induced by solution dispensing are necessary for practical applications such as the study of the transient state of macromolecules crystallography during the ligand binding *** this purpose,we study the inertial mixing in a configuration compatible with the room-temperature crystallography using the acoustic levitation diffractometer,therein solution drops ejected at high velocity collide and coalesce with droplets dis-pensed on acoustically levitated and rotating polymer thin-film sample *** the proposed method,we are able to achieve the mixing time of∼0.1 s for sub-micro and a few microliter *** observed short mixing time is ascribed to the rapid penetration of the solution into the droplets and confirmed by a computational fluid dynamic *** demonstrated accelerated solution mixing is tested in a pilot time-lapse protein crystallography experiment using the acoustic levitation *** results indicate the detection of transient ligand binding state within 2 s after the solution dispensing,suggesting the feasibility of the proposed method for studying slow biochemical processes.

关键词： mixing droplets transient

Manipulating guest-responsive spin transition to achieve switchable fluorescence in a Hofmann-type framework

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Science China Chemistry 2024年第10期67卷 3339-3346页

作者： Xue-Ru Wu Shu-Qi Wu Zhi-Kun Liu Ming-Xing Chen Jun Tao Osamu sato Hui-Zhong Kou Engineering Research Center of Advanced Rare Earth Materials(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing 100084China Institute for Materials Chemistry and Engineering&IRCCS Kyushu University744 MotookaNishi-kuFukuoka 819-0395Japan Key Laboratory of Cluster Science of Ministry of Education School of Chemistry and Chemical EngineeringLiangxiang CampusBeijing Institute of TechnologyBeijing 102488China Analytical Instrumentation Center College of Chemistry and Molecular EngineeringPeking UniversityBeijing 100871China

The change of fluorescence emission manipulated by spin state transition attracts considerable attention owing to its potential applications in magneto-optical switching ***,we report two two-dimensional(2D)Hofmann-type spin crossover(SCO)metal-organic frameworks(MOFs)[Fe^(Ⅱ)(PNI)_(2){Ag^(Ⅰ)(CN)_(2)}_(2)]·CHCl_(3)(3Ag·CHCl_(3))and[FeⅡ(PNI)_(2){AuⅠ(CN)_(2)}_(2)]·CHCl_(3)(3Au·CHCl_(3))based on the fluorescent ligand N-(4-pyridylmethyl)-1,8-naphthalimide(PNI).Both complexes exhibit interesting SCO behaviors switched by guest solvent molecules,namely three-step transitions for the solvated complexes and complete onestep hysteretic SCO for the desolvated ones,verified by temperature-dependent magnetic susceptibility measurements,Mossbauer spectra,structural analyses,and differential scanning calorimetry ***,temperature-dependent fluorescence spectra exhibit double peaks(monomer and excimer emission)with both emission peaks change consistent with the change in SCO properties during the solvent molecule *** this study,we integrated guest-responsive SCO behavior into MOFs to manipulate the multistability of spin state and fluorescence switching,providing a rational strategy for the development of stimuli-responsive multifunctional materials.

关键词： spin crossover fluorescence multifunctional materials metal-organic frameworks Hofmann-type

On the beginning of the Japanese Upper Paleolithic:A review of recent archaeological and anthropological evidence

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人类学学报 2024年第3期43卷 470-487页

作者： Hiroyuki sato Kazuki MORISAKI The University of Tokyo 7-3-1HongoBunkyo-kuTokyo113-0033 Japan

The beginning of the Japanese Upper Paleolithic has mainly been examined using two major models:the Middle Paleolithic evolutionary model within the archipelago and the continental Upper Paleolithic diffusion/migration ***,recent archeological data from Japan and nearby countries are challenging such simple *** paper critically reviews previous chronology of the Japanese Paleolithic,including possible Lower and Middle Paleolithic(LP/MP),and attempts to show an alternative model of the beginning of the Japanese Upper *** paper suggests several possible specimens of LP/MP and recommends further geoarchaeological investigation to understand the reliability and cultural relationship between possible LP/MP specimens and the Early Upper Paleolithic(EUP).The start of the Japanese EUP is presently characterized by a flake industry with trapezoids and denticulates around 39-37 kaBP cal on Paleo-Honshu Island,which has partial resemblance with contemporary assemblages in China and the Korean Peninsula,although trapezoids are endemic only to the Japanese EUP and may have derived from the ancestral lithic *** technology appeared earliest on Central Paleo-Honshu Island,about 1000 years later than the earliest flake *** blade technology may have originated from the elongated flake technology of the previous period,the sudden simultaneous emergence implies that it diffused from the Korean *** paper proposes that blade technology from the Korean Peninsula arrived on the northeastern Paleo-Honshu Island,including the Japan Sea coastal region of western Honshu,rather than the southwest,where flake technology long prospered,due to differences in ecological settings and adaptation strategies between the two regions.

关键词： Japanese Archipelago Early Upper Paleolithic migration route trapezoid denticulate blade technology