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Geometry, Electronic Structure, and Related Properties of Dye Sensitizer： 3,4-bis[1- （carboxymethyl）-3-indolyl]- 1 H-pyrrole-2,5-dione

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Chinese Journal of Chemical Physics 2009年第1期22卷 63-68页

作者： Cai-rong Zhang You-zhi Wu yu-hong chen yu-tian Ding Ding-jun Zhang hong-shan chen Department of Applied Physics Lanzhou University of Technology Lanzhou 730050 China School of Material Science and Engineering Lanzhou University of Technology Lanzhou 730050 China College of Physics and Electronic Engineering Northwest Normal University Lanzhou 730070 China

The geometry, electronic structure, polarizability and hyperpolarizability of dye sensitizer 3,4-bis[1-（carboxymethyl）-3-indolyl]-1H-pyrrole-2,5-dione （BIMCOOH） were studied using density functional theory （DFT） with hybrid functional B3LYP, and the electronic absorption spectra were investigated using semi-empirical quantum chemical method ZINDO-1 and time-dependent DFT （TDDFT）. The results of natural bond orbital suggest that the natural charges of the dione, indole, and acetic groups are about 0.15e, -0.29e, and 0.44e, respectively. The calculated isotropic polarizability, polarizability anisotropy invariant and hyperpolarizability are 305.4, 188.3, and 1155.4 a.u., respectively. The electronic absorption spectral features in visible and near-UV region were assigned to the π→π^＊ transition due to the qualitative agreement between the experiment and the TDDFT calculations, and the transitions of the excited states 9-11 related to photoinduced intramolecular charge transfer processes. The analysis of electronic structure and UV-Vis absorption indicates that the indole groups primarily contributed sensitization of photo-to-currency conversion processes, and the interracial electron transfer between semiconductor TiO2 electrode and dye sensitizer BIMCOOH are electron injection processes from excited states of the dyes to the semiconductor conduction band.

关键词： Dye sensitizer Electronic structure Density functional theory Absorption spectrum

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Near real-time gravitational wave data analysis of the massive black hole binary with TianQin

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Science China(Physics,Mechanics & Astronomy) 2024年第7期67卷 175-186页

作者： hong-yu chen Xiang-yu Lyu En-Kun Li Yi-Ming Hu MOE Key Laboratory of TianQin Mission TianQin Research Center for Gravitational Physics&School of Physics and AstronomyFrontiers Science Center for TianQinGravitational Wave Research Center of CNSASun Yat-sen University(Zhuhai Campus)Zhuhai 519082China

Space-borne gravitational wave(GW)detectors can detect the merger of massive black *** early warning and localization of GW events before merging can be used to inform electromagnetic telescopes and conduct multimessenger ***,this requires real-time data transmission and analysis *** geocentric orbit of the space-borne GW detector Tian Qin makes it possible to conduct real-time data *** this study,we develop a search and localization pipeline for massive black hole binaries(MBHBs)with Tian Qin under both regular and real-time data transmission *** demonstrate that,with real-time data transmission,MBHBs can be accurately localized on the *** the approaching merger,each analysis can be finished in only 40 *** an MBHB system at a distance of 1 Gpc,if we receive data every hour,then we can pinpoint its location to within less than 1 deg^(2)on the final day before the merger.

关键词： gravitational wave detectors and experiments black holes data analysis algorithms and implementation data management

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Metagenomic analysis reveals hidden links between gut microbes and habitat adaptation among cave and surface dwelling Sinocyclocheilus species

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Zoological Research 2023年第4期44卷 793-807页

作者： hong-yu chen Chun-Qing Li Shan-yuan chen Hen Xiao School of Ecology and Environmental Sciences Yunnan UniversityKunmingYunnan 650500China Institute of Medical Biology Chinese Academy of Medical Sciences and Peking Union Medical SchoolKunmingYunnan 650031China

Intestinal microbes are closely related to vital host functions such as digestion and nutrient absorption,which play important roles in enhancing host *** a natural“laboratory”,caves provide an outstanding model for understanding the significance of gut microbes and feeding habits in the habitat adaptability of ***,research on the relationship between gut microbes,feeding habits,and the adaptability of troglobites remains *** this study,we compared the characteristics of the intestinal microbes of Sinocyclocheilus cavefish and surface fish and further established the relationship between intestinal and habitat ***,we conducted environmental DNA(eDNA)(metabarcoding)analysis of environmental samples to clarify the composition of potential food resources in the habitats of the Sinocyclocheilus cavefish and surface *** showed that the structure of the Sinocyclocheilus gut microbes was more related to ecological type(habitat type)than phylogenetic *** horizontal transfer of habitat microbes was a source of gut microbes,hosts also showed strong selection for inherent microbes as dominant *** in the composition and structure of gut microbes,especially dominant microbes,may enhance the adaptability of the two Sinocyclocheilus fish types from the perspectives of food intake,nutrient utilization,and harmful substance metabolism,suggesting that food resources,predation patterns,intestinal flora,digestive and absorptive capacity,and feeding habits and preferences are linked to habitat *** results should facilitate our understanding of the significance of fish gut microbes to habitat adaptation and provide a new perspective for studying the adaptive mechanisms of cavefish.

关键词： Cavefish Intestinal microbes Sinocyclocheilus Adaptive mechanism

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Phase composition and luminescent properties of strontium aluminate long persistence phosphor synthesized by combustion synthesis method with different Sr/Al ratios

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Rare Metals 2013年第4期32卷 414-419页

作者： Wen-Zhou Sun yu-hong chen Lan-Er Wu Yong Jiang School of Materials Science and Engineering Beifang University of Nationalities

Strontium aluminate long persistence phos phors are synthesized by combustion method. By control- ling the raw material ratio （Sr/Al）, the effects of phase composition on subsequent spectroscopic properties of phosphors are studied. Results show that the phase com-position changes from strontium-rich phase to aluminum- rich phase with the decrease of Sr/AI： when the rate of Al/Sr changes from 3：1 to 1：1, the main crystal phase of samples is Sr3Al206, and it exhibits the characteristic fluorescence of Eu^3＋ in the lattice of Sr3Al206; when the rate of Al/Sr is between 1：2 and 2：7, phase composition is the mixture of SrAl204 and SrAl4OT, and it emits the characteristic fluorescence of Eu^2＋ in SrAl204 but not in SrAl4OT; when Al/Sr decreases to 1：4 or even 1：12, the main crystal phase of samples transform into SrAl12019, and the characteristic emission peak is about 470 nm, which corresponds to the characteristic emission of Eu2＋ in SrAl12019. At the end of the article, the influence laws of two different synthesis methods on phase composition of samples between high-temperature solid method and combustion method are compared. Compared with the high-temperature solid method, the rule of influence is similar, but the mole ratio of Al/Sr in products is always higher than the initial ratio of the raw material, and com-pounds like Sr4Al14025 are not obtained by combustion method.

关键词： Strontium aluminate long persistencephosphors Combustion synthesis Sr/Al ratio Phasecomposition Emission wavelength

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Role of laser scan strategies in defect control,microstructural evolution and mechanical properties of steel matrix composites prepared by laser additive manufacturing

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International Journal of Minerals,Metallurgy and Materials 2021年第3期28卷 462-474页

作者： hong-yu chen Dong-dong Gu Qing Ge Xin-yu Shi hong-mei Zhang Rui Wang Han Zhang Konrad Kosiba College of Materials Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China Jiangsu Provincial Engineering Laboratory for Laser Additive Manufacturing of High-Performance Metallic Components Nanjing University of Aeronautics and AstronauticsNanjing 210016China Leibniz IFW Dresden Institute for Complex MaterialsHelmholtzstr.2001069 DresdenGermany

Steel matrix composites(SMCs)reinforced with WC particles were fabricated via selective laser melting(SLM)by employing various laser scan strategies.A detailed relationship between the SLM strategies,defect formation,microstructural evolution,and mechanical properties of SMCs was *** laser scan strategies can be manipulated to deliberately alter the thermal history of SMC during SLM ***,the involved thermal cycling,which encompassed multiple layers,strongly affected the processing quality of *** scan sequence combined with interlayer offset and orthogonal stagger mode can effectively eliminate the metallurgical defects and retained austenite within the produced ***,due to large thermal stress,microcracks that were perpendicular to the building direction formed within the *** employing the checkerboard filling(CBF)hatching mode,the thermal stress arising during SLM can be significantly reduced,thus preventing the evolution of interlayer *** compressive properties of fabricated SMCs can be tailored at a high compressive strength(~3031.5 MPa)and fracture strain(~24.8%)by adopting the CBF hatching mode combined with the optimized scan sequence and stagger *** study demonstrates great feasibility in tuning the mechanical properties of SLM-fabricated SMCs without varying the set energy input,e.g.,laser power and scanning speed.

关键词： laser additive manufacturing selective laser melting scan strategy defect control mechanical property

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Association of the retinol to all-trans retinoic acid pathway with autism spectrum disorder

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World Journal of Pediatrics 2024年第10期20卷 1043-1058页

作者： yu-Ru Feng Qian Zhang Jing-Kun Miao Ting Yang Jie chen hong-yu chen Qiu-hong Mou Xue-Li Xiang Dan Long Qiu-hong Wei yuan Wu Ting-yu Li Children Nutrition Research Center Chongqing Key Laboratory of Child Neurodevelopmental and Cognitive DisordersMinistry of Education Key Laboratory of Child Development and DisordersNational Clinical Research Center for Child Health and DisordersChildren’s Hospital of Chongqing Medical UniversityNo 1362nd Zhongshan RdYuzhong DistrictChongqingChina Department of Pediatrics Women and Children’Hospital of Chongqing Medical UniversityChongqing Health Center for Women and ChildrenChongqingChina

Background Autism spectrum disorder(ASD)is a complex group of neurodevelopmental *** has highlighted a close association between the retinoic acid(RA)signaling pathway and *** study investigates alterations in the vitamin A(VA,retinol)to RA metabolic pathway in children with ASD and speculates on the underlying reasons for these *** propose a subtype characterized by downregulated RA signaling in ASD,laying the groundwork for precise diagnosis and treatment *** We included 489 children with ASD and 280 typically developing(TD)*** with ASD underwent evaluations of core symptoms and neuro-developmental levels,which were conducted by professional developmental behavior physicians using assessment *** VA and all-trans RA(atRA)levels were determined by high-performance liquid chromatography and ultra-high-performance liquid chromatography–tandem mass *** expression levels and concentrations of enzyme molecules such as retinol dehydrogenase 10 were assessed using quantitative polymerase chain reaction and enzyme-linked immunosorbent *** Children with ASD exhibited reduced serum atRA,accompanied by a downregulation of atRA synthesis *** reduction in serum atRA levels was linked not only to VA levels but also to the aberrant expression of metabolic enzymes responsible for ***,the serum atRA levels in children with ASD were more strongly correlated with core symptoms and neurodevelopmental levels than VA *** Children with ASD exhibited a dual regulation of reduced serum atRA levels,influenced by both VA levels and abnormal expression of atRA metabolic enzymes.

关键词： All-trans retinoic acid Autism spectrum disorder Retinoic acid signaling pathway Vitamin A Vitamin A metabolism

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Three new C_(20)-diterpenoid alkaloids from Delphinium anthriscifolium ***

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Chinese Chemical Letters 2009年第6期20卷 698-701页

作者： Xiao yu Liu Qiao hong chen Feng Peng Wang Department of Chemistry of Medicinal Natural Products West China College of Pharmacy Sichuan University Chengdu 610041 China

Three new C20-diterpenoid alkaloids, designated as anthriscifolmines A-C （1-3）, together with two known alkaloids denudatine and delgramine, were isolated from the whole herb of Delphinium anthriscifolium var. savat... 详细信息

关键词： Delphinium anthriscifolium vat. savatieri C20-diterpenoid alkaloid Anthriscifolmines A-C

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Symmetry-Dependent Kinetics of Dislocation Reaction

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Chinese Physics Letters 2021年第6期38卷 45-48页

作者： hong yu chen Lei Wang Tian Hui Zhang Center for Soft Condensed Matter Physics and Interdisciplinary Research Soochow UniversitySuzhou 215006China School of Physical Science and Technology Soochow UniversitySuzhou 215006China

Reactions between dislocations are investigated in two-dimensional colloidal *** is found that,because of the conservation of total Burgers vectors,the kinetics of the reaction is dependent on the the symmetry of the crystal *** is possible only when the total Burgers vector of the reacting dislocations is in line with existing crystal *** non-merging reactions,the number of dislocations cannot be reduced but the interacting dislocations can exchange their Burgers vectors and migrate to different gliding *** changing of gliding lines promises additional annihilation in multi-dislocation *** bonding of non-merging dislocations determines the configuration and the orientation of the grain *** findings in this study may shed new light on understanding of dislocations and have potential applications in fabrication of crystalline materials.

关键词： grain Kinetics annihilation

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Ileal bronchogenic cyst: A case report and review of literature

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World Journal of Clinical Cases 2018年第14期6卷 807-810页

作者： hong-yu chen Li-yuan Fu Zhen-Jun Wang Department of General Surgery Beijing Chaoyang Hospital Capital Medical University

We herein report a rare case of ileal bronchogenic cyst that was found in a 39-year-old Chinese man. He had no symptoms and the physical examination was normal. Tumor markers were within the normal range. Abdominopelvic enhanced computed tomography showed a mass in the lower abdominal cavity and the tumor had a complete capsule. Diagnostic laparoscopy was then performed, which showed that a spheroid mass with a complete capsule was located at the antimesenteric border of the distal ileum 20 cm from the ileocecal valve, measuring 6.0 cm × 6.0 cm × 5.0 cm. Considering that the malignancy of the tumor cannot be ruled out, and there is a risk of rupture during laparoscopic surgery, the patient was conver-ted to an open surgery. Partial resection of the ileum with the tumor was performed, followed by a side-to-side anastomosis. The tumor was gray-red in color,filled with grayish yellow mucus and had no septum. The postoperative pathology revealed that the cystic wall was lined by pseudostratified ciliated columnar epithelium without cellular atypia. The wall consisted of bronchial mucous glands and smooth muscle fbers, and no abnormalities were found in adjacent ileumtissues. Thus, a diagnosis of bronchogenic cyst of the ileum was made.

关键词： Laparoscopy Ileal neoplasms Epithelium Bronchogenic cyst Abdominal cavity Case report

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Oxidation behavior of multi-component Ta-W-Al-Ti alloy at 1173 K

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Rare Metals 2021年第7期40卷 1940-1948页

作者： Jia-Xin Li yu-hong chen Zhang-Jun Bai Bao-Jun Zhao Liang Jiang Lan-Er Wu School of Materials Science and Engineering North Minzu UniversityYinchuan 750021China CNMC Ningxia Orient Group Co.Ltd Shizuishan 753000China School of Chemical Engineering The University of QueenslandBrisbaneQLD 4072Australia

Ta-W alloys have unique properties but their applications at high temperatures are restricted due to their poor oxidation *** addition of Al and Ti decreases the oxidation rate of the alloy,as Al-contained protective oxide layer could be *** this study,ternary and quaternary Ta-W alloys containing Al and Ti were prepared by hot press *** microstructures and oxidation behaviors of the alloys were studied at1173 *** results show that the oxidation kinetics of all alloys follows a parabolic law at short oxidation *** cyclic oxidation,the kinetics of quaternary alloys still obeys the parabolic law but that of ternary alloy has been changed into linear law kinetics after 8-h *** ternary alloy,an outer layer with dense and continuous alumina was formed during the initial stage,and phase transformation caused the oxides to peel *** comparison,the quaternary alloys depicted continuously solid solution of the oxides ***,Al and Ti played key roles in oxidation degree and affected the oxidation kinetics of ternary and quaternary alloys.

关键词： Oxidation behavior Ta-W-based alloy Aluminum Titanium

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