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Rare Metals 2023年第5期42卷 1670-1677页

作者： Wen Ma Hao Huang Wang Ding Shun Guo hai-xia liu xiao-Nong Cheng School of Materials Science and Engineering Jiangsu UniversityZhenjiang212013China China Grinm Group Co. Ltd.Bejing100088China

In this work,a multi-phase Zr-30Ti-7Nb-4Sn alloy with large near-linear elastic deformability was prepared by the solution treatment plus pre-straining(S TP)treatment,and the underlying mechanism accountable for the near-linear elastic deformation was systematically *** was found that the Zr-30Ti-7Nb-4Sn alloy was composed ofβ,α″andα′phases,and numerous dislocations were formed in the alloy specimen after STP *** the retarding effect of high-density dislocations,the stress-induced martensitic(SIM)transformation fromβtoα″phases took place homogeneously and continuously during loading,in conjunction with the occurrence of elastic deformation ofβ,α″andα′*** the entire tensile procedure,no observable phase transformation occurred betweenα′martensite andβ***,the near-linear elastic deformation capability in STP Zr-30Ti-7Nb-4Sn alloy is mainly ascribed to the coupling actions of consecutiveβ→α″SIM transformation and intrinsic elastic deformation ofβ,α″andα′*** experimental results provide a basis for designing and developing novel multi-phase Zr-based alloys that possess large near-linear deformability.

关键词： Zr-based alloy Multi-phase Near-linear deformation behavior Martensitic transformation

Mechanism of cryogenic,solid solution and aging compound heat treatment of die-cast Al alloys considering microstructure variation

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稀有金属:英文版 2023年第9期42卷 3130-3138页

作者： Cheng Tao xiao-Nong Cheng Zhi-Qiang Li Guang-Lei liu Fu-hai Xu Shu-Kuan Xie Zhong-Hua Kuang Yong Guo hai-xia liu School of Materials Science and Engineering Jiangsu UniversityZhenjiang212013China Jiangsu Minglida Technology Co. Nantong226602China

To develop a new compound heat treatment process for improving the mechanical properties of die-cast Al alloys,this study investigated the effects of cryogenic,solution and aging compound treatment on the microstructure and mechanical properties of die-cast Al *** characterization methods used were optical microscopy(OM),scanning electron microscopy(SEM),transmission electron microscopy(TEM),electron backscatter diffraction(EBSD),and tensile tests;and the Image Pro Plus software was used for statistical *** results indicated that compared with T6 heat treatment,the compound heat treatment process consisting of cryogenic treatment(-196.C for 12 h),solid solution treatment(476.C for 22 min),and aging(159.C for 403 min)significantly enhanced the mechanical properties of the diecast Al *** instance,the tensile strength increased from 224.3 to 249.5 MPa;the hardness increased from HV110.5 to HV 124.6,and the elongation increased from6.28%to 7.72%,which in relative terms corresponds to11.2%,12.8%and 22.9%,*** compound heat treatment process of the alloy led to significant refinement of its a-Al *** addition,Si phases tended to be more ellipsoidal or granular,while the tips of Fecontaining phases became rounded,which played a key role in enhancing the mechanical properties and microstructure stability of the alloys.

关键词： Die-cast Al alloys Heat treatment Cryogenic sequence Microstructure Strengthening mechanism

In situ synchrotron X-ray diffraction analysis of deformation behavior of a Nb/NiTi composite for biomedical applications

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Rare Metals 2021年第3期40卷 600-606页

作者： Shun Guo Rui-Tang Wu Yu-Lu Shi Yan-Pin Hou Wen Ma Guang-Lei liu hai-xia liu xiao-Nong Cheng School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China Youke Publishing Co. Ltd.GRINM Group Co.Ltd.Beijing 100088China

The deformation behavior involved in Nb/NiTi composite for biomedical applications within a large macroscopic strain range was investigated by tensile loading-unloading test and in situ synchrotron X-ray diffraction(SXRD).Experimental results show that during loading,the Nb/NiTi composite experiences the elastic elongation of B2-NiTi austenitic,B19’-NiTi martensitic and β-Nb phases,B2→ B19’ stress-induced martensitic(SIM) transformation and tensile plastic deformation of β-Nb *** unloading,the deformation behavior involved in Nb/NiTi composite includes the elastic recovery of B2-NiTi austenitic,B19’-NiTi martensitic and β-Nb phases,reverse phase transformation B19’→B2 and compressive deformation of p-Nb *** martensitic transformation in this composite is almost reversible and occurs in a localized *** results might contribute to a comprehensive understanding of the deformation mechanism involved in Nb/NiTi composite and shed some light on design and development of novel composites with a combination of good biocompatibility and excellent superelasticity for biomedical applications.

关键词： Nb/NiTi composite Deformation behavior Superelasticity Localized martensitic transformation

Micromechanical behavior of TiNb/NiTi composite during a pre-straining process:an in situ synchrotron investigation

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Rare Metals 2023年第1期42卷 263-272页

作者： Shun Guo Wang Ding Ting-Hui Wu Wen Ma Bao-Guo Shen hai-xia liu xiao-Nong Cheng School of Materials Science and Engineering Jiangsu UniversityZhenjiang212013China Youke Publishing Co. LtdGrinm Group Co.LtdBeijing100088China Zhenjiang Key Laboratory of UAV Application Technology Jiangsu Aviation Technical CollegeZhenjiang212134China

The micromechanical behavior of a recently developed TiNb/NiTi composite during a pre-straining process was investigated to broaden the understanding of deformation mechanisms of the martensitic-transforming *** was found that during loading,besides inherent elastic elongation,the TiNb/NiTi composite also experienced two different categories of stress-induced martensitic transformations(SIMTs,including B2→B19’andβ→α")and slight plastic *** the following unloading,this composite recovered elastically,and underwent simultaneously a fully reversibleα"→βSIMT as well as a partially reversible B19’→B2 *** was the incomplete B19’→B2 SIMT and the permanent plastic deformation that led to the~4.6%macroscopic residual strain after *** the entire loading-unloading procedure,the growth and shrinkage of(001)compound twins in B19’martensite also contributed to the large nearlinear-elastic deformation of the present composite.

关键词： Metal matrix composites Mechanical properties Phase transitions Synchrotron radiation

Mosaic structure ZnO formed by secondary crystallization with enhanced photocatalytic performance

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International Journal of Minerals,Metallurgy and Materials 2021年第3期28卷 495-502页

作者： hai-xia liu Meng-yuan Teng Xu-guang Wei Tian-duo Li Zai-yong Jiang Qing-fen Niu Xu-ping Wang Shandong Provincial Key Laboratory of Molecular Engineering School of Chemistry and Pharmaceutical EngineeringQilu University of Technology(Shandong Academy of SciencesJinan 250353China State Key Laboratory of Biobased Material and Green Papermaking Qilu University of Technology(Shandong Academy of SciencesJinan 250353China Advanced Materials Institute Qilu University of Technology(Shandong Academy of SciencesJinan 250014China

Zinc acetate is used as a raw material to synthesize the desired ZnO in hot solvent by controlling the amount of citric acid(CA)***,the amount of CA added has a significant relationship with the control of the morphology of *** ZnO wrapped in nanosheets is synthesized through the secondary crystallization of Zn^(2+).The optical properties of the ZnO sample are tested through the degradation of organic ***,the photocatalytic properties of ZnO vary with the different amounts of CA *** of the active crystal face increases the photocatalytic activity of *** addition,the number of defects on the surface of the ZnO sample increases because of its large specific surface area,thus changing the bandgap of ***,the resulting sample can respond under visible light.

关键词： active crystal face citric acid secondary crystallization photocatalysis

Impact of wetting-drying cycles and acidic conditions on the soil aggregate stability of yellow‒brown soil

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Journal of Mountain Science 2024年第6期21卷 2075-2090页

作者： xia Zhenyao NI Yuanzhen liu Deyu WANG Di xiaO hai Key Laboratory of Geological Hazards on Three Gorges Reservoir Area Ministry of EducationYichang 443002China College of Civil Engineering&Architecture China Three Gorges UniversityYichang 443002China Engineering Research Center of Eco-environment in Three Gorges Reservoir Region Ministry of EducationChina Three Gorges UniversityYichang 443002China

Soil aggregate is the basic structural unit of soil,which is the foundation for supporting ecosystem functions,while its composition and stability is significantly affected by the external *** study was conducted to explore the effect of external environment(wetting-drying cycles and acidic conditions)on the soil aggregate distribution and stability and identify the key soil physicochemical factors that affect the soil aggregate *** yellow‒brown soil from the Three Gorges Reservoir area(TGRA)was used,and 8 wetting-drying conditions(0,1,2,3,4,5,10 and 15 cycles)were simulated under 4 acidic conditions(pH=3,4,5 and 7).The particle size distribution and soil aggregate stability were determined by wet sieving method,the contribution of environmental factors(acid condition,wetting-drying cycle and their combined action)to the soil aggregate stability was clarified and the key soil physicochemical factors that affect the soil aggregate stability under wetting-drying cycles and acidic conditions were determined by using the Pearson’s correlation analysis,Partial least squares path modeling(PLS‒PM)and multiple linear regression *** results indicate that wetting-drying cycles and acidic conditions have significant effects on the stability of soil aggregates,the soil aggregate stability gradually decreases with increasing number of wetting-drying cycles and it obviously decreases with the increase of ***,the combination of wetting-drying cycles and acidic conditions aggravate the reduction in the soil aggregate *** wetting-drying cycles,acidic conditions and their combined effect imposes significant impact on the soil aggregate stability,and the wetting-drying cycles exert the greatest *** soil aggregate stability is significantly correlated with the pH,Ca^(2+),Mg^(2+),maximum disintegration index(MDI)and soil bulk density(SBD).The PLS‒PM and multiple linear regression analysis further reveal that the soil aggre

关键词： Yellow‒brown soil Wetting-drying cycles Acidic conditions Soil aggregate stability Soil disintegration

Uniaxial tensile deformation behavior of a sandwich-like structural TiNb-NiTi composite for biomedical applications

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Rare Metals 2021年第12期40卷 3627-3634页

作者： Shun Guo Wei Wang Bao-Guo Shen Li Tan hai-xia liu Wen Ma Zhong-Min Xie xiao-Nong Cheng Ping Shi School of Materials Science and Engineering Jiangsu UniversityZhenjiang 212013China Zhenjiang Key Laboratory of UAV Application Technology Jiangsu Aviation Technical CollegeZhenjiang 212134China e-mail:shiping@***

The uniaxial tensile deformation behavior of a sandwich-like structural TiNb-NiTi composite was investigated by uniaxial tensile test and in situ high-energy synchrotron X-ray diffraction(SXRD).It is found that below 1.2%macroscopic strains,the elastic deformations of the B2,β,B19'andα"phases take place in the TiNbNiTi *** the subsequent loading,theβ→α"and B2→B19'stress-induced martensitic transformations(SIMTs)occur within the macroscopic strains of 0.5%-4.2%and the macroscopic strains of 0.7%-6.2%,*** the macroscopic strain of about 4.2%,the outer TiNb layer of the TiNb-NiTi composite experiences a partial fracture,as proved by the disappearance of(040)_(α")and a sudden jump in the(110)_(B19')d-spacing caused by load *** further uniaxial tensile deformation,the TiNbNiTi composite finally fractures at a strain of~6.2%.Our results might provide some valuable information for understanding the deformation behavior of novel sandwich-like structural shape memory composites in more depth.

关键词： TiNb-NiTi composite Uniaxial tensile deformation behavior Synchrotron X-ray diffraction(SXRD) Sandwich-like structure

Sensitive determination of 4-O-methylhonokiol in rabbit plasma by high performance liquid chromatography and application to its pharmacokinetic investigation

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Journal of Pharmaceutical Analysis 2011年第2期1卷 108-112页

作者： Ming-Yue Li Yu-hai Tang xia liu hai-Yan Lu Xi-Yan Shi Institute of Analytical Science Xi 'an Jiaotong University Xi'an 710061 China.

A novel high performance liquid chromatographic method was developed for the determination of 4-O- methylhonokiol in rabbit plasma and was applied to its pharmacokinetic investigation. Plasma samples were treated by one-fold volume of methanol and acetonitrile to remove the interference proteins. A reverse phase column of SHIM- PACK VP-ODS （150 mm × 4.6 mm, 5.0 μm） was used to separate 4-O-methylhonokiol in the plasma samples. The detection limit of 4-O-methylhonokiol was 0.2 μg/L and the linear range was 0. 012 - 1. 536 mg/L. The good extraction recoveries were obtained for the spiked samples （84.7%, 89.3% and 87.7% for low, middle and high concentrations of added standards, respectively）. The relative standard deviation of intra-day and inter-day precisions was in the range from 0.6% to 13.5%. The pharmacokinetic study of 4-O-methylhonokiol was made and the results from the plasmaconcentration curve of 4-0-methylhonokiol showed a two-apartment open model. This work developed a sensitive, stable and rapid HPLC method for the determination of 4-O-methylhonokiol and the developed method has been successfully applied to a pharmacokinetic study of 4-O-methylhonokiol.

关键词： 4-O-methylhonokiol Cortex Magnoliae Officinalis high performance liquid chromatography pharmacokinetic

Wumei pills attenuates 5-fluorouracil-induced intestinal mucositis through Toll-like receptor 4/myeloid differentiation factor 88/nuclear factor-κB pathway and microbiota regulation

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World Journal of Gastroenterology 2022年第32期28卷 4574-4599页

作者： Dong-Xue Lu Feng liu Hua Wu hai-xia liu Bing-Yu Chen Jing Yan Yin Lu Zhi-Guang Sun Department of Nutrition Acupuncture and Moxibustion and Massage College&Health Preservation and Rehabilitation CollegeNanjing University of Chinese MedicineNanjing 210023Jiangsu ProvinceChina Department of Orthopaedics Nanjing Pukou District Chinese Medicine HospitalNanjing 210000Jiangsu ProvinceChina Department of Oncology Affiliated Hospital of Nanjing University of Chinese MedicineNanjing 210000Jiangsu ProvinceChina Department of Geriatrics The First Affiliated Hospital of Henan University of Traditional Chinese MedicineZhengzhou 451150Henan ProvinceChina Key Laboratory for Metabolic Diseases in Chinese Medicine The First Clinical Medical CollegeNanjing University of Chinese MedicineNanjing 210023Jiangsu ProvinceChina Key Pharmacology Laboratory of Jiangsu Province Nanjing University of Chinese MedicineNanjing 210023Jiangsu ProvinceChina The First Clinical Medical College Nanjing University of Chinese MedicineNanjing 210023Jiangsu ProvinceChina

BACKGROUND Radiotherapy and chemotherapy can kill tumor cells and improve the survival rate of cancer ***,they can also damage normal cells and cause serious intestinal toxicity,leading to gastrointestinal mucositis[1].Traditional Chinese medicine is effective in improving the side effects of *** pills(WMP)was originally documented in the Treatise on Exogenous Febrile *** has a significant effect on chronic diarrhea and other gastrointestinal diseases,but it is not clear whether it affects chemotherapy induced intestinal mucositis(CIM).AIM To explore the potential mechanism of WMP in the treatment of CIM through experimental *** We used an intraperitoneal injection of 5-fluorouracil(5-Fu)to establish a CIM mouse model and an oral gavage of WMP decoction(11325 and 22650 mg/kg)to evaluate the efficacy of WMP in *** evaluated the effect of WMP on CIM by observing the general conditions of the mice(body weight,food intake,spleen weight,diarrhea score,and hematoxylin and eosin stained tissues).The expression of tumor necrosis factor-α(TNF-α),interleukin-6(IL-6),IL-1β,and myeloperoxidase(MPO),as well as the Toll-like receptor 4/myeloid differentiation factor 88/nuclear factor-κB(TLR4/MyD88/NF-κB)signaling pathway proteins and tight junction proteins(zonula occludens-1,claudin-1,E-cadherin,and mucin-2)was ***,intestinal permeability,intestinal flora,and the levels of short-chain fatty acids(SCFA)were also *** WMP effectively improved the body weight,spleen weight,food intake,diarrhea score,and inflammatory status of the mice with intestinal mucositis,which preliminarily confirmed the efficacy of WMP in *** experiments showed that in addition to reducing the levels of TNF-α,IL-1β,IL-6,and MPO and inhibiting the expression of the TLR4/MyD88/NF-κB pathway proteins,WMP also repaired the integrity of the mucosal barrier of mice,regulated the intestinal flora,and increased the levels of S

关键词： Wumei pills Gut flora Intestinal mucosal inflammation Mucosal barrier Short-chain fatty acids Intestinal permeability

MicroRNA expression in the hippocampal CA1 region under deep hypothermic circulatory arrest

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Neural Regeneration Research 2019年第11期14卷 2003-2010页

作者： xiao-Hua Wang Dong-Xu Yao Xiu-Shu Luan Yu Wang hai-xia liu Bei liu Yang liu Lei Zhao Xun-Ming Ji Tian-Long Wang Department of Anesthesiology Xuanwu HospitalCapital Medical UniversityBeijingChina Institute of Geriatrics BeijingChina National Clinical Research Center for Geriatric Disorders BeijingChina Department of Neurosurgery Xuanwu HospitalCapital Medical UniversityBeijingChina Cerebrovascular Research Center Xuanwu HospitalCapital Medical UniversityBeijingChina

Using deep hypothermic circulatory arrest, thoracic aorta diseases and complex heart diseases can be subjected to corrective procedures. However, mechanisms underlying brain protection during deep hypothermic circulatory arrest are unclear. After piglet models underwent 60 minutes of deep hypothermic circulatory arrest at 14°C, expression of microRNAs(miRNAs) was analyzed in the hippocampus by microarray. Subsequently, TargetScan 6.2, RNA22 v2.0, miRWalk 2.0, and miRanda were used to predict potential targets, and gene ontology enrichment analysis was carried out to identify functional pathways involved. Quantitative reverse transcription-polymerase chain reaction was conducted to verify miRNA changes. Deep hypothermic circulatory arrest altered the expression of 35 miRNAs. Twenty-two miRNAs were significantly downregulated and thirteen miRNAs were significantly upregulated in the hippocampus after deep hypothermic circulatory arrest. Six out of eight targets among the differentially expressed miRNAs were enriched for neuronal projection(cyclin dependent kinase, CDK16 and SLC1 A2), central nervous system development(FOXO3, TYRO3, and SLC1 A2), ion transmembrane transporter activity(ATP2 B2 and SLC1 A2), and interleukin-6 receptor binding(IL6 R)– these are the key functional pathways involved in cerebral protection during deep hypothermic circulatory arrest. Quantitative reverse transcription-polymerase chain reaction confirmed the results of microarray analysis. Our experimental results illustrate a new role for transcriptional regulation in deep hypothermic circulatory arrest, and provide significant insight for the development of miRNAs to treat brain injuries. All procedures were approved by the Animal Care Committee of Xuanwu Hospital, Capital Medical University, China on March 1, 2017(approval No. XW-INI-AD2017-0112).

关键词： nerve regeneration cerebral protection deep hypothermic circulatory arrest gene ontology enrichment analysis microRNA hippocampus post-transcriptional expression microarray bioinformatics neural regeneration