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Aerobic Enantioselective Epoxidation of Styrene Analogues Induced by (β-Diketone)-iron( Ⅲ ) Complex

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Chinese Chemical letters 2005年第11期16卷 1467-1470页

作者： Qing Fang CHENG Xing You XU Wei Xing MA Shu Jie YANG Tian pa YOU Department of Chemical Technology Huaihai Institute of Technology Lianyungang 222005 Meterials Chemistry laboratory Nanjing University of Science and Technology Nanjing 210094 Department of Chemistry University of Science and Technology of China Hefei 230026

Tris（d,d-dicampholylmethanato） iron （Ⅲ） complex, Fe（dcm）3, was found to be an excellent catalyst for asymmetric oxygenation of styrene analogues into the corresponding epoxides. Good chemical yields and higher enantioselectivity were obtained with combined use of molecular oxygen and an aldehyde at 30℃, Some factors influencing enantioselectivity were discussed.

关键词： Epoxidation oliefin asymmetric catalysis (β-diketone)-iron (Ⅲ) complex.

Ultrasound-assisted musculoskeletal procedures:A practical overview of current literature

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World Journal of Orthopedics 2011年第7期2卷 57-66页

作者： Nelson A Royall Emily Farrin David P Bahner Stanislaw pa Stawicki Department of Emergency Medicine The Ohio State University Medical CenterColumbusOH 43210United States Department of Orthopaedics The Ohio State University Medical CenterColumbusOH 43210United States Department of Surgery Division of Critical CareTrauma and BurnThe Ohio State Unviersity Medical CenterColumbusOH 43210United States

Traditionally performed by a small group of highly trained specialists,bedside sonographic procedures involving the musculoskeletal system are often delayed despite the critical need for timely diagnosis and *** to this limitation,a need evolved for more portability and accessibility to allow performance of emergent musculoskeletal procedures by adequately trained non-radiology *** emergence of ultrasound-assisted bedside techniques and increased availability of portable sonography provided such an opportunity in select clinical *** review summarizes the current literature describing common ultrasound-based musculoskeletal ***-depth discussion of each ultrasound procedure including pertinent technical details,indications and contraindications is *** the limited amount of prospective,randomized data in this area,a substantial body of observational and retrospective evidence suggests potential benefits from the use of musculoskeletal bedside sonography.

关键词： Musculoskeletal ultrasound-guided procedures Arthrocentesis Tendon injection Articular injection Fluid collection Abscess drainage Foreign body removal

Enhanced thermoelectric composite performance from mesoporous carbon additives in a commercial Bi_(0.5)Sb_(1.5)Te_(3) matrix

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Journal of Materials Science & Technology 2021年第35期94卷 175-182页

作者： Seong-Tae Kim Jong Min park Kwi-Il park Sang-Eun Chun Ho Seong lee Pyuck-pa Choi Seonghoon Yi School of Materials Science and Engineering Kyungpook National UniversityDaegu 41566Republic of Korea Department of Materials Science and Engineering Korea Advanced Institute of Science and Technology(KAIST)291 Daehak-roYuseong-guDaejeon 34141Republic of Korea

Composites were prepared,through hot pressing,using carbon materials with different pore size distributions as additives for commercial Bi_(0.5)Sb_(1.5)Te_(3) thermoelectric material(BST,p-type).Thermoelectric properties of the composites were measured in a temperature range of 298-473 *** conductivity of the composites,especially lattice thermal conductivity,was effectively decreased due to the mesoporous properties of the incorporated carbon *** electrical conductivity of the composites slightly decreased due to the electron scattering at the interface between the carbon material and the commercial BST *** composite with 0.2 vol.%mesoporous carbon powder(36%mesoporosity)exhibited a figure of merit value approximately 10.7%higher than that of commercial BST without *** behavior resulted in 116%improved output power in the composite block-based single element compared with a bare BST thermoelectric *** enhanced figure of merit was attributed to the effective reduction of lattice thermal conductivity by acoustic phonons scattering at the interface between the BST matrix and the mesoporous carbon as well as at the pore surfaces within the mesoporous *** utilizing mesoporous carbon materials used in this study,the shortcomings and economic difficulties of the composite process with low dimensional carbon additives(carbon nanotubes,graphene,and nanodiamond)can be overcome for extensive practical *** carbon powder with a tailored porosity distribution revealed the validity of bulk-type carbon additives to enhance the figure of merit of commercial thermoelectric materials.

关键词： Thermoelectric material Bi_(0.5)Sb_(1.5)Te_(3) Mesoporous carbon lattice thermal conductivity Figure of merit

Error Estimates for Finite-Element Navier-Stokes Solvers without Standard Inf-Sup Conditions

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Chinese Annals of Mathematics,Series B 2009年第6期30卷 743-768页

作者： Robert l.PEGO Department of Mathematical Sciences and Center for Nonlinear Analysis Carnegie Mellon University PittsburghPA 15213USA

The authors establish error estimates for recently developed finite-element methods for incompressible viscous flow in domains with no-slip boundary *** methods arise by discretization of a well-posed extended Navier-Stokes dynamics for which pressure is determined from current velocity and force *** methods use C1 elements for velocity and C0 elements for pressure.A stability estimate is proved for a related finite-element projection method close to classical time-splitting methods of Orszag,Israeli,DeVille and Karniadakis.

关键词： Time-dependent incompressible flow Projection method Backward facing step Driven cavity Stokes pressure leray projection Obtuse corner Recycling

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Journal of Materials Science & Technology 2022年第16期111卷 99-110页

作者： Vioni Dwi Sartika Won Seok Choi Gwanghyo Choi Jaewook Han Sung-Jin Chang Won-Seok Ko Blazej Grabowski Pyuck-pa Choi Department of Materials Science and Engineering Korea Advanced Institute of Science and TechnologyDaejeon 34141Republic of Korea Gangwon Regional Division Korea Institute of Industrial TechnologyGangwon 25440Republic of Korea Division of Measurement and Analysis National Nanofab CenterDaejeon 34141Republic of Korea School of Materials Science and Engineering University of UlsanUlsan 44610Republic of Korea Institute for Materials Science University of StuttgartPfaffenwaldring 5570569 StuttgartGermany

We report laser cladding of pure titanium on a CoCrMo alloy using directed energy *** electron microscopy,the microstructural evolution upon varying the process parameters,especially laser power and powder feed rate,was investigated in relation to crack *** layers showing dilution rates of more than 5%contained cracks due to the formation of the brittle Co_(2)Ti intermetallic *** observed cracks could be ascribed to a mismatch in thermal expansion and a resulting stress of more than 440 Mpa acting on the Co_(2)Ti phase,as determined by density functional theory and ***,an excess laser energy caused chemical inhomogeneity and unmelted Ti powder particles,while a deficient laser energy resulted in a lack of *** cracks nor partially melted powders were observed for a powder feed rate of 3 g/min and a laser power of 225–300 W,for which the dilution rate was minimized to less than 5%.For such samples,the cladding layers comprised pureα-Ti and a uniform CoT i interface with Co_(2)Ti islands.

关键词： Additive manufacturing Dissimilar metal joining Titanium Cobalt-based alloy

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精神疾病的文化解读(综述)

中国健康心理学杂志 2024年第1期32卷 20-24页

作者：帕丽扎提·木合塔尔郭琪袁晓劲张玲胡平中国人民大学心理学系北京100872 南京晓庄学院

西方诊断系统的精神疾病虽然在不同社会存在疾病种类、核心症状等方面的共通性,但精神疾病同时具有文化相对性。文章通过梳理国内外有关文化与精神疾病关系的研究,总结文化对精神疾病的形成、评估以及治疗等方面的影响,并提出有助于提... 详细信息

西方诊断系统的精神疾病虽然在不同社会存在疾病种类、核心症状等方面的共通性,但精神疾病同时具有文化相对性。文章通过梳理国内外有关文化与精神疾病关系的研究,总结文化对精神疾病的形成、评估以及治疗等方面的影响,并提出有助于提高精神疾病治疗的文化胜任力的建议。

关键词：文化精神疾病精神疾病药物治疗心理治疗

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游离DNA在肝脏疾病中的应用进展

疑难病杂志 2024年第6期23卷 756-759页

作者：何粤川帕成周何玲华(综述) 陈刚(审校) 云南省昆明市第一人民医院/昆明医科大学附属甘美医院肝胆胰外科 650011

体液活检与传统侵入性检查相比具有许多独特的优势,尤其在产前诊断、器官移植后免疫排异反应、肿瘤早期诊断和肝脏疾病诊疗方面展现出巨大潜力。在肝脏疾病领域,游离DNA参与机体内在的炎性反应和凝血过程。基于表观遗传学的研究,游离DN... 详细信息

体液活检与传统侵入性检查相比具有许多独特的优势,尤其在产前诊断、器官移植后免疫排异反应、肿瘤早期诊断和肝脏疾病诊疗方面展现出巨大潜力。在肝脏疾病领域,游离DNA参与机体内在的炎性反应和凝血过程。基于表观遗传学的研究,游离DNA片段的甲基化分析对肝脏恶性肿瘤的早期诊断和治疗大有帮助。在器官移植后,游离DNA有望成为监测免疫排异反应的重要标志物,为关于免疫排异反应机制的研究提供了新角度。文章对游离DNA的来源、提取方法、检测方法,以及其在肝移植、肝癌、肝衰竭等疾病中的研究应用进展进行综述。

关键词：游离DNA 肝癌肝移植炎性反应

Transcriptional profiling of dental sensory and proprioceptive trigeminal neurons using single-cell RNA sequencing

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International Journal of Oral Science 2023年第3期15卷 513-526页

作者： pa Reum lee Jihoon Kim Heather lynn Rossi Sena Chung Seung Yub Han Junhyong Kim Seog Bae Oh Department of Neurobiology and Physiology School of Dentistry and Dental Research InstituteSeoul National UniversitySeoulRepublic of Korea Genomics and Computational Biology Graduate Group University of PennsylvaniaPhiladelphiaPAUSA Department of pathobiology University of PennsylvaniaPhiladelphiaPAUSA Department of Biology University of PennsylvaniaPhiladelphiaPAUSA Brain Science Institute Korea Institute of Science and Technology(KIST)SeoulRepublic of Korea

Dental primary afferent(Dpa)neurons and proprioceptive mesencephalic trigeminal nucleus(MTN)neurons,located in the trigeminal ganglion and the brainstem,respectively,are essential for controlling masticatory *** extensive transcriptomic studies on various somatosensory neurons,there is still a lack of knowledge about the molecular identities of these populations due to technical challenges in their circuit-validated ***,we employed high-depth single-cell RNA sequencing(scRNA-seq)in combination with retrograde tracing in mice to identify intrinsic transcriptional features of Dpa and MTN *** transcriptome analysis revealed five major types of Dpa neurons with cell type-specific gene enrichment,some of which exhibit unique mechano-nociceptive properties capa.le of transmitting nociception in response to innocuous mechanical stimuli in the ***,we discovered cellular heterogeneity within MTN neurons that potentially contribute to their responsiveness to mechanical stretch in the masseter muscle ***,Dpa and MTN neurons represented sensory compartments with distinct molecular profiles characterized by various ion channels,receptors,neuropeptides,and ***,our study provides new biological insights regarding the highly specialized mechanosensory functions of Dpa and MTN neurons in pain and proprioception.

关键词： trigeminal specialized Together

Catalytic Asymmetric Cyclopropanation using a New Chiral β-Diketone Cu (Ⅱ) Complex as a Catalyst

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Chinese Chemical letters 1998年第7期9卷 607-608页

作者： Yu XU Zhong Yi WANG and Tian pa YOU(Department of Chemistry, University of Science and Technology of China, Hefei 230026) Department of Chemistry Univ. of Sci./Technology of China Hefei 230026 China

A new chiral β-diketone Cu (Ⅱ) catalyst was synthesized and used for the asymmetric cyclopropanation of styrene with diazoester. A high optical yield (~90%) was achieved. The effect of the structure of substrate on the enantioselectivity was studied. Both chendcal yield and optical yield being reduced when the steric bulky substrate was employed. The reaction mechanism and the chiral model of the transition state are under fufther investigation.

关键词： Asymmetric cyclopropanation β-Diketone Cu (Ⅱ) Complex