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Synthesis and Crystal Structure of Complex [Pb(qina)_2(DMSO)]·H_2O

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Chinese Journal of Structural Chemistry 2007年第3期26卷 357-360页

作者： ZHANG Wan-Zhong wei De-Zhou GAO En-Jun sun ya-Guang School of Resources and Civil Engineering Northeastern University Shenyang 11 0015 China Laboratory of Coordination Chemistry Shenyang Institute of Chemical Technology Shenyang 110142 China

A novel complex [Pb（qina）2（DMSO）]·H2O was synthesized, of which qinais the quinaldic acid radical and DMSO the dimethyl sulfoxide. Elemental analysis, IR spectra, and X-ray single-crystal diffraction were carried out to determine the composition and crystal structure. This complex belongs to monoclinic system, space group P121/n1, with a = 7.1553（17）, b = 17.543（2）, c = 17.306（2） A, β = 91.671（4）°, C22H20N206PbS, Mr = 647.65, Z = 4, V= 2171.5（6） A3, Dc= 1.981 g/cm^3, μ= 7.908 mm^-1, F（000） = 1248, -9≤h≤6, -23≤k≤19, -22≤1≤22, R= 0.0221 and wR= 0.0488. Weak coordinate bond is formed between oxygen atom in DMSO and Pb（ Ⅱ ）. There are also weak interactions, such as π-π interaction, hydrogen bonds and so on, among the complex molecules.

关键词： Pb(Ⅱ) complex crystal structure

Synthesis and Structure of a Novel Macrocyclic Complex [Cd_2(phen)_4(phth)_2]·4H_2O

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Chinese Journal of Structural Chemistry 2005年第11期24卷 1298-1301页

作者： sun ya-Guang GAO En-Jun wei De-Zhou LIU Yi-Nan Laboratory of Coordination Chemistry Shenyang Instituteof Chemical Technology Shenyang Liaoning 110142 China School of Resource ＆ Civil Engineering Northeastern University Shenyang Liaoning 110004 China

A novel complex [Cd2（phen）4（phth）2]·4H2O has been synthesized by the reaction of Hzphth（phthalic acid） and phen（1,10-phenanthroline） with Cd（Ⅱ） in ethanol-water solution. X-ray crystal structure analysis shows it crystallizes in triclinic, space group PI- with a = 10.619（3）, b = 12.560（4）, c = 12.651（4） A, a = 98.775（5）, β = 109.035（5）,γ = 113-576（5）°, C32H24CdN4O6, Mr= 672.95, V = 1381.7（7）A^3, Rint = 0.0358, Z = 2, Dc= 1.618 g/cm^3,μ = 0.845 mm^-1, -6 ≤h≤13, -15 ≤k ≤13, -15 ≤l≤14, F（000） = 680, S = 1.038, R = 0.0480 and wR = 0.0849 for 3992 observed reflections （1 〉 2σ（Ⅰ））. Phth bridges Cd（Ⅱ） to form a macrocyclic compound, and a 2D supramolecular motif is formed through hydrogen bonds and π-π interaction.

关键词： cadmium complex crystal structure hydrogen bonding π-π interaction

Assessment of advanced RANS turbulence models for prediction of complex flows in compressors

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Chinese Journal of Aeronautics 2023年第9期36卷 162-177页

作者： wei sun China Academy of Aerospace Science and Innovation Beijing 100176China

Reynolds-Averaged Navier-Stokes(RANS) Computational Fluid Dynamics(CFD) has been widely used in compressor design and analysis. However, reasonable prediction of compressor flow and its impact on compressor performance remains challenging. In this study, Menter’s Shear Stress Transport(SST) model and its variants, as well as the ω-based Reynolds stress model(Stress-BSL) are assessed. For a single rotor(Rotor 67), under the peak efficiency operating condition, all studied turbulence models predict its performance with reasonable accuracy;under the off-design conditions, SST with Helicity correction(SST-Helicity) shows superiority in predicting the effect of flow on the spanwise distribution of aerodynamic parameters. For Darmstadt’s 1.5-stage transonic axial compressor, SST-Helicity outperforms SST, SST with the Quadratic Constitutive Relation(SST-QCR) and Stress-BSL in predicting the performance as well as the spanwise distribution of aerodynamic parameters. At the design rotating speed, the stall margin given by SST-Helicity(20.90%) is the closest to the experimental measurement(24.81%), which is more than twice that by SST(8.71%) and 1.5 times that by SST-QCR(14.14%). This paper demonstrates that SSTHelicity model, together with a good quality and sufficiently refined grid, can capture the compressor flow features with reasonable accuracy, which results in a credible prediction of compressor performance and stage matching.

关键词： Compressor flow Computational Fluid Dynamics(CFD) Reynolds-Averaged Navier-Stokes(RANS) Reynolds stress model Stall margin Shear Stress Transport(SST)model Turbulence modelling

Chondroitinase ABC combined with Schwann cell transplantation enhances restoration of neural connection and functional recovery following acute and chronic spinal cord injury

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Neural Regeneration Research 2025年第5期20卷 1467-1482页

作者： Wenrui Qu Xiangbing Wu wei Wu Ying Wang yan sun Lingxiao Deng Melissa Walker Chen Chen Heqiao Dai Qi Han Ying Ding Yongzhi Xia George Smith Rui Li Nai-Kui Liu Xiao-Ming Xu Spinal Cord and Brain Injury Research Group Stark Neurosciences Research InstituteDepartment of Neurological SurgeryIndiana University School of MedicineIndianapolisINUSA Department of Hand Surgery the Second Hospital of Jilin UniversityChangchunJilin ProvinceChina Shriners Hospitals Pediatric Research Center Temple University School of MedicinePhiladelphiaPAUSA Department of Anatomy&Cell Biology Indiana University School of MedicineIndianapolisINUSA

Schwann cell transplantation is considered one of the most promising cell-based therapy to repair injured spinal cord due to its unique growth-promoting and myelin-forming properties.A the Food and Drug Administration-approved Phase I clinical trial has been conducted to evaluate the safety of transplanted human autologous Schwann cells to treat patients with spinal cord injury.A major challenge for Schwann cell transplantation is that grafted Schwann cells are confined within the lesion cavity,and they do not migrate into the host environment due to the inhibitory barrier formed by injury-induced glial scar,thus limiting axonal reentry into the host spinal *** we introduce a combinatorial strategy by suppressing the inhibitory extracellular environment with injection of lentivirus-mediated transfection of chondroitinase ABC gene at the rostral and caudal borders of the lesion site and simultaneously leveraging the repair capacity of transplanted Schwann cells in adult rats following a mid-thoracic contusive spinal cord *** report that when the glial scar was degraded by chondroitinase ABC at the rostral and caudal lesion borders,Schwann cells migrated for considerable distances in both rostral and caudal *** Schwann cell migration led to enhanced axonal regrowth,including the serotonergic and dopaminergic axons originating from supraspinal regions,and promoted recovery of locomotor and urinary bladder ***,the Schwann cell survival and axonal regrowth persisted up to 6 months after the injury,even when treatment was delayed for 3 months to mimic chronic spinal cord *** findings collectively show promising evidence for a combinatorial strategy with chondroitinase ABC and Schwann cells in promoting remodeling and recovery of function following spinal cord injury.

关键词： axonal regrowth bladder function chondroitinase ABC functional recovery glial scar lentivirus migration Schwann cell spinal cord injury transplantation

Experimental investigation of transient characteristics of mild surge and diffuser rotating stall in a centrifugal compressor with vaned diffuser

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Science China(Technological Sciences) 2020年第7期63卷 1212-1223页

作者： ZHAO yang XI Guang ZOU HanSen sun ya wei WANG ZhiHeng National Engineering Research Centre of Fluid Machinery&Compressors Xi’an Jiaotong UniversityXi'an 710049China

The centrifugal compressor is widely used for gas compression in various industrial fields such as aero-engine, gas turbine and turbocharger. However, the stable operating range is usually restricted by the occurrence of flow instability such as stall and surge. The paper experimentally examines the developing process of surge and stall occurring in a centrifugal compressor to advance the understanding on flow mechanism of flow instability. It is found that three types of pressure fluctuation can be observed at low flowrate region. At the critical point, the local stall firstly occurs in some specific diffuser passages and the enlarged local diffuser stall eventually induces the mild surge of compression system indicated by the sinusoidal pressure fluctuation. At lower mass flow rate, the diffuser stall cell begins to circumferentially propagate along the impeller rotating direction at 11% of rotor speed with the existence of mild surge. In comparative analysis of IGV pre-swirl angle on the occurrence of mild surge, the mild surge still occurs at the operating condition when the slope of the characteristic map of test stage is still obviously negative, in which the compression system is supposed to be stable in previous study. And a new suggested criterion for the prediction of mild surge is demonstrated that the occurrence of mild surge depends on the destabilization effect of downstream components about diffuser and volute. Combined with the experimental data, the streamwise distribution characteristic of diffuser stall can be used to develop the simplified model of lumped parameters for the analysis on the generation mechanism of the diffuser rotating stall. The quantitative investigation on the relation between the pressure-rise characteristic of subcomponents and the occurrence of mild surge and diffuser rotating stall not only advances the prediction of stability limit but also lays the theoretic foundation for controlling these unsteady behaviors to improve t

关键词： centrifugal compressor mild surge diffuser rotating stall transient measurement

Fiber-Shaped Triboiontronic Electrochemical Transistor

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Research 2021年第1期2021卷 1245-1254页

作者： Jinran Yu Shanshan Qin Huai Zhang Yichen wei Xiaoxiao Zhu ya yang Qijun sun Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Department of Materials Science WW-4 LKOUniversity of Erlangen-NurembergMartensstrasse 791058 ErlangenGermany Center on Nanoenergy Research School of Physical Science and TechnologyGuangxi UniversityNanning 530004China Beijing Institute of Fashion Technology Beijing 100029China

Contact electrification-activated triboelectric potential offers an efficient route to tuning the transport properties in semiconductor devices through electrolyte dielectrics,i.e.,*** electrochemical transistors(OECTs)make more effective use of ion injection in the electrolyte dielectrics by changing the doping state of the semiconductor ***,the mainstream flexible/wearable electronics and OECT-based devices are usually modulated by electrical signals and constructed in conventional geometry,which lack direct and efficient interaction between the external environment and functional electronic ***,we demonstrate a fiber-shaped triboiontronic electrochemical transistor with good electrical performances,including a current on/off ratio as high as≈1286 with off-current at~nA level,the average threshold displacements(D_(th))of 0.3 mm,the subthreshold swing corresponding to displacement(SS_(D))at 1.6 mm/dec,and excellent flexibility and *** proposed triboiontronic electrochemical transistor has great potential to be used in flexible,functional,and smart self-powered electronic textile.

关键词： transistor tuning durability

Identification of processed Chinese medicinal materials using DNA mini-barcoding

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Chinese Journal of Natural Medicines 2017年第7期15卷 481-486页

作者： SONG Ming DONG Gang-Qiang ZHANG ya-Qin LIU Xia sun wei Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences Beijing 100700 China School of Chemistry Chemical Engineering and Life Sciences Wuhan University of Technology Wuhan 430070 China Amway (China) Botanical Research and Development Center Wuxi 214145 China

Most of Chinese medicinal herbs are subjected to traditional processing procedures, including stir-frying, charring, steaming, boiling, and calcining before they are released into dispensaries. The marketing and identification of processed medicinal materials is a growing issue in the marketplace. However, conventional methods of identification have limitations, while DNA mini-barcoding, based on the sequencing of a short-standardized region, has received considerable attention as a new potential means to identify processed medicinal materials. In the present study, six DNA barcode loci including ITS2, psb A-trn H, rbc L, mat K, trnL(UAA) intron and its P6 loop, were employed for the authentication of 45 processed samples belonging to 15 species. We evaluated the amplification efficiency of each locus. We also examined the identification accuracy of the potential mini-barcode locus, of trnL(UAA) intron P6 loop. Our results showed that the five primary barcode loci were successfully amplified in only 8.89%——20% of the processed samples, while the amplification rates of the trnL(UAA) intron P6 loop were higher, at 75.56% successful amplification. We compared the mini-barcode sequences with Genbank using the Blast program. The analysis showed that 45.23% samples could be identified to genus level, while only one sample could be identified to the species level. We conclude that trnL(UAA) p6 loop is a candidate mini-barcode that has shown its potential and may become a universal mini-barcode as complementary barcode for authenticity testing and will play an important role in medicinal materials control.

关键词： DNA barcoding trnL(UAA)intron P6 loop Identification Processed medicinal materials Mini-barcode

Phenylboronic acid and dopamine as probe set for electrochemical detection of saccharides

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Chinese Chemical Letters 2013年第4期24卷 291-294页

作者： Jian Li ya-Qin sun Yin-Mao wei Jian-Bin Zheng Institute of Analytical Science/Shaanxi Key Laboratory of Electroanalytical Chemistry Northwest University

A novel electrochemical approach for detection of saccharides via indicator displacement assay was presented. In this system, 2-fluorophenylboronic acid and dopamine （DA） were performed as probe set. The electrochemical properties of DA and the binding to 2-fluorophenylboronic acid in phosphate buffer at different pH values were investigated by cyclic voltammetry. After addition of fructose to the solution, a competition for the binding 2-fluorophenylboronic acid occurred that led to the release of the DA. The regenerate oxidation current of DA increased with increasing fructose concentration. Under optimized experimental conditions, the peak current was linearly related to fructose concentration in the range of 0.3-5.0 mmol[L with a detection limit of 0.1 mmolJL In addition, the interaction between 2- fluorophenylboronic acid and other cis-diol compounds such as glucose, galactose and mannose was investigated.

关键词： ElectrochemistrySaccharidesDopaminePhenylboronic acidIndicator displacement assay

Numerical analysis of seabed dynamic response in vicinity of mono-pile under wave-current loading

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Water Science and Engineering 2020年第1期13卷 74-82页

作者： Jie Lin Ji-sheng Zhang Ke sun Xing-lin wei ya-kun Guo Key Laboratory of Coastal Disaster and Defence(Hohai University) Ministry of EducationNanjing 210098China College of Harbor Coastal and Offshore EngineeringHohai UniversityNanjing 210098China Faculty of Engineering&Informatics University of BradfordBradford BD71DPUK

Pile foundations have been widely used in offshore *** this study,a three-dimensional numerical model was used to investigate the seabed response around a mono-pile under wave-current ***-averaged Navier-Stokes equations were used to simulate the flow field,and Biot's consolidation equations were used for simulating the response of a porous *** pore water pressure within soil and the effective stress along the depth of the seabed were simulated for various current velocities,with currents traveling either along or against the *** indicate that the current has a significant effect on the effective stress and the pore water pressure distributions,which increases with the current velocity,and that the current traveling against the wave increases the liquefaction depth of the porous seabed.

关键词： Numerical simulation Dynamic response Wave-current loading Mono-pile foundation Porous seabed