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Microstructure optimization of directionally solidified hypereutectic Nb-Si alloy

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Transactions of Nonferrous Metals Society of China 2013年第10期23卷 2874-2881页

作者：王嘉宜贾丽娜马立敏原赛男张晓丽张虎北京航空航天大学材料科学与工程学院北京100191 军事交通学院军事物流系天津300161

Nb-16Si-24Ti-10Cr-2A1-2Hf alloy was directionally solidified with withdrawal rates of 1.2, 6, 18, 36 and 50 mrn/min and then heat treated at 1400, 1450 and 1500℃with withdrawal rate of 50 mm/min for 10 h. The effects of withdrawal rate and heat treatment temperature on the microstructure were studied. The microstructure of directionally solidified alloy was composed of the primary NbsSi3, Nbss/NbsSi3 eutectic cells and Cr2Nb, which distribute paralleled to the growth direction. The microstructure becomes more refined with the increasing withdrawal rate, accompany with the evolution of eutectic cells morphology. After heat treatment, Nbss phase connects and forms a continuous matrix, and the Cr2Nb phase becomes smaller and distributes more dispersedly. After heat treatment at 1450 ℃ for 10 h, the alloy achieves balance between the optimization of microstructure and alleviation of solute segregation.

关键词： Nb-Si alloy directional solidification eutectic withdrawal rate microstructure heat treatment

HER2表达强度对三阴性乳腺癌无病生存率的影响

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癌症进展 2016年第12期14卷 1221-1224页

作者：高津张莉莉胡赛男袁渊江苏省肿瘤医院内科江苏南京210009

目的研究免疫组化中表皮生长因子受体2（HER2）表达强度与三阴性乳腺癌（TNBC）无病生存率（DFS）的关系。方法回顾性分析经病理证实的103例TNBC患者的临床病理特征,以及HER2表达强度（阴性、＋、2＋但HER2基因无扩增）与TNBC治疗后DFS... 详细信息

目的研究免疫组化中表皮生长因子受体2（HER2）表达强度与三阴性乳腺癌（TNBC）无病生存率（DFS）的关系。方法回顾性分析经病理证实的103例TNBC患者的临床病理特征,以及HER2表达强度（阴性、＋、2＋但HER2基因无扩增）与TNBC治疗后DFS的关系。结果 103例TNBC患者的年龄为23~79岁,中位年龄52岁;随访时间60~141个月,中位随访时间90个月,无失访病例;随访期间34例（33.0%）患者出现复发转移。单因素分析显示,HER2表达强度（P=0.012）、肿块大小（P=0.037）、病理组织学分级（P=0.005）、淋巴结转移数目（P﹤0.001）与患者的DFS有关。Cox多因素分析表明,HER2表达强度（P=0.001）、病理组织学分级（P=0.001）、淋巴结转移数目（P﹤0.001）是影响TNBC患者DFS的独立危险因素。结论 HER2表达强度、病理组织学分级、淋巴结转移数目是影响TNBC患者生存独立预后因素。HER2强度越强、病理组织学分级越高、淋巴结转移数目越多,患者DFS越低。

关键词：三阴性乳腺癌表皮生长因子受体2 无病生存率

Melting Evaluation of Phase Change Materials Impregnated into Cascaded Metal Foams with Regionalized Enhancement

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Journal of Thermal Science 2025年第1期 223-241页

作者： WEI Xinyi ZHANG nan ZHANG Zhaoli CAO Xiaoling yuan Yanping School of Mechanical Engineering Southwest Jiaotong University

Metal foam promotes the heat transfer of phase change materials(PCMs) in the penalty of reducing the energy storage density of the composite *** this work,the effects of constant porosity(0.96,0.94,0.92,or 0.90) and pore density(PPI) of metal foam on heat transfer of composite PCMs are *** rate could be enhanced by employing with low porosity copper ***,aiming to the right bottom phase changing "dead region",a regionalized enhancement strategy of cascaded metal foams is *** dynamic melting performances of all the composite PCMs are comprehensively *** results reveal that the cascaded configuration is beneficial for *** show that the horizontal strategy enhances melting performance:a maximum of 17.98% reduction in total melting time could be reached when the rear part porosity is 90%.The energy storage density rate could be raised by 5.48%.Besides,the vertical strategy performs with a better average temperature uniformity of 0.441 and brings a lower temperature in the heated *** sum up,the regionalized enhancement of copper foam provides better performance in the phase change *** shows significant potential for solar heat storage and thermal protection.

关键词：

The dopaminergic system and Alzheimer's disease

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Neural Regeneration Research 2025年第9期20卷 2495-2512页

作者： Yuhan Zhang yuan Liang Yixue Gu International Medical College Chongqing Medical UniversityChongqingChina College of Pharmacy Chongqing Medical UniversityChongqingChina Department of Neurology The First Affiliated Hospital of Chongqing Medical UniversityChongqing Key Laboratory of NeurologyChongqingChina

Alzheimer's disease is a common neurodegenerative disorder in older *** its prevalence,its pathogenesis remains unclea *** addition to the most widely accepted causes,which in clude excessive amyloid-beta aggregation,tau hyperphosphorylation,and deficiency of the neurotransmitter acetylcholine,numerous studies have shown that the dopaminergic system is also closely associated with the occurrence and development of this *** is a crucial catecholaminergic neurotransmitter in the human ***-associated treatments,such as drugs that target dopamine receptor D and dopamine analogs,can improve cognitive function and alleviate psychiatric symptoms as well as ameliorate other clinical *** r,therapeutics targeting the dopaminergic system are associated with various adverse reactions,such as addiction and exacerbation of cognitive *** review summarizes the role of the dopaminergic system in the pathology of Alzheimer's disease,focusing on currently available dopamine-based therapies for this disorder and the common side effects associated with dopamine-related *** aim of this review is to provide insights into the potential connections between the dopaminergic system and Alzheimer's disease,thus helping to clarify the mechanisms underlying the condition and exploring more effective therapeutic options.

关键词： adverse drug reaction Alzheimer's disease catecholamine dopamine receptor dopamine receptor heterodimers dopaminergic system neurodegenerative disease neurotransmitter signaling pathways traditional Chinese medicine treatment

Sex differences in aging and injured brain

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Neural Regeneration Research 2025年第10期20卷 2901-2902页

作者： Jordan N.Williamson yuan Yang University of Illinois Urbana-Champaign Grainger College of EngineeringDepartment of BioengineeringUrbanaILUSA Carle Foundation Hospital Stephenson Family Clinical Research InstituteClinical Imaging Research CenterUrbanaILUSA University of Illinois Urbana-Champaign Beckman Institute for Advanced Science and TechnologyUrbanaILUSA Northwestern University Department of Physical Therapy and Human Movement SciencesChicagoILUSA

Background:The prevalence,age of onset,and symptomatology of traumatic brain injury,stroke,and neurodegenerative diseases(such as Alzheimer’s disease(AD),Parkinson’s disease,amyotrophic lateral sclerosis,and Huntington’s disease)differ substantially between males and *** higher prevalence of these brain disorders has been attributed to females having a greater longevity compared with *** one of the greatest risk factors of acquired brain injury(such as stroke,traumatic brain injury caused by fall)and neurodegenerative disease is age.

关键词： Huntington prevalence traumatic

Peripheral mitochondrial DNA as a neuroinflammatory biomarker for major depressive disorder

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Neural Regeneration Research 2025年第6期20卷 1541-1554页

作者： Jinmei Ye Cong Duan Jiaxin Han Jinrong Chen Ning Sun yuan Li Tifei yuan Daihui Peng Division of Mood Disorder Shanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghaiChina Department of Psychiatry First Hospital of Shanxi Medical UniversityTaiyuanShanxi ProvinceChina Shanghai Key Laboratory of Psychotic Disorders Brain Health InstituteNational Center for Mental DisordersShanghai Mental Health CenterShanghai Jiao Tong University School of MedicineShanghaiChina Co-Innovation Center of Neuroregeneration Nantong UniversityNantongJiangsu ProvinceChina

In the pathogenesis of major depressive disorder, chronic stress-related neuroinflammation hinders favorable prognosis and antidepressant response. Mitochondrial DNA may be an inflammatory trigger, after its release from stress-induced dysfunctional central nervous system mitochondria into peripheral circulation. This evidence supports the potential use of peripheral mitochondrial DNA as a neuroinflammatory biomarker for the diagnosis and treatment of major depressive disorder. Herein, we critically review the neuroinflammation theory in major depressive disorder, providing compelling evidence that mitochondrial DNA release acts as a critical biological substrate, and that it constitutes the neuroinflammatory disease pathway. After its release, mitochondrial DNA can be carried in the exosomes and transported to extracellular spaces in the central nervous system and peripheral circulation. Detectable exosomes render encaged mitochondrial DNA relatively stable. This mitochondrial DNA in peripheral circulation can thus be directly detected in clinical practice. These characteristics illustrate the potential for mitochondrial DNA to serve as an innovative clinical biomarker and molecular treatment target for major depressive disorder. This review also highlights the future potential value of clinical applications combining mitochondrial DNA with a panel of other biomarkers, to improve diagnostic precision in major depressive disorder.

关键词： biomarker cytokine exosomes inflammasome major depressive disorder microglia mitochondrial DNA mitochondrial dysfunction neuroinflammation Toll-like receptor

Infant biliary cirrhosis secondary to a biliary inflammatory myofibroblastic tumor: A case report and review of literature

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World Journal of Clinical Cases 2022年第23期10卷 8375-8383页

作者： yuan Huang sai-nan Shu Hua Zhou Ling-Ling Liu Feng Fang Department of Pediatrics Tongji HospitalTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030Hubei ProvinceChina

BACKGROUND A biliary inflammatory myofibroblastic tumor(IMT)is a rare type of mesenchymoma that,although it has a broad age spectrum,usually occurs in *** is difficult because biliary IMTs often exhibit nonspecific clinical symptoms and imaging features,resulting in delayed or inappropriate *** most IMTs are benign,some show malignant properties such as infiltration,recurrence,and *** SUMMARY Here,we retrospectively describe a 10-month-old infant who was admitted to our hospital due to stubborn *** patient responded poorly to routine medical treatment and his clinical manifestations and laboratory tests lacked specificity,so we turned to repeated ultrasound scans and other imaging *** both hepatosplenic ultrasonography and diffusion-weighted magnetic resonance imaging demonstrated a space-occupying lesion,an exploratory laparotomy was *** final diagnosis made over two mo after the disease onset was infant biliary cirrhosis caused by a biliary IMT,which partially infiltrated into the *** infant is the youngest case of biliary IMTs that has been reported till *** patient underwent an incomplete resection of the mass and Kasai ***,because of cirrhosis,he also received a paternal liver *** some IMTs show malignant properties,we proceeded with a three-year of follow-up;however,no recurrence or metastasis has been *** Neoplastic disease such as IMTs should be considered when routine medical treatment of obstructive jaundice is not *** of dynamic imaging changes is helpful for *** follow-up is necessary for IMTs.

关键词： Inflammatory myofibroblastic tumor Inflammatory pseudotumor Obstructive jaundice Biliary cirrhosis mesenchymoma Case report

Preparation and optical properties of tin dioxide inverse opal film

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Rare Metals 2022年第3期41卷 1032-1036页

作者： Jin-Quan Wang yuan-yuan Wu sai-sai yuan Ming Zhang Xiao-Bing Chen College of Chemistry and Chemical Engineering Yangzhou UniversityYangzhou 225002China School of Life Science and Chemical Engineering Huaiyin Institute of TechnologyHuaiyin 223003China

As a novel structure, inverse opal, with threedimensional periodic macropore and mesopore and huge specific surface area, has great promising applications. In this paper, tin dioxide (SnO_(2)) inverse opal films were prepared with sol–gel method by cooperative opal template. The surface morphologies of SnO_(2)inverse opal films were examined by scanning electron microscopy (SEM), the inner structure of SnO_(2)inverse opal films was examined by transmission electron microscopy (TEM), the optical properties of SnO_(2)inverse opal films were studied and discussed in detail. Optical reflectance spectra reveal that, for the opal films, the wavelengths of the reflectance peak confirmed by the experimental reflectance spectra are consistent with the theoretical values;for the SnO_(2)inverse opal films, the wavelengths of the reflectance peak confirmed by the experimental reflectance spectra deviate from theoretical values largely.

关键词： SnO_(2) Inverse opal Preparation Optical property

Analysis of Bright Source Hardness Ratios in the 4 yr Insight-HXMT Galactic Plane Scanning Survey Catalog

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Research in Astronomy and Astrophysics 2024年第2期24卷 154-170页

作者： Chen Wang Jin-yuan Liao Ju Guan yuan Liu Cheng-Kui Li Na sai Jing Jin Shuang-nan Zhang Key Laboratory of Space Astronomy and Technology National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Department of Astronomy School of Physics and TechnologyWuhan UniversityWuhan 430072China WHU-NAOC Joint Center for Astronomy Wuhan UniversityWuhan 430072China

We conduct a statistical analysis of the hardness ratio(HR)for bright sources in the 4 yr Galactic Plane Scanning Survey catalog of *** on the stable(variable)flux F_(s)(F_(v))or spectrum S_(s)(S_(v))of each source,the bright sources are classified into three groups:F_(v)&S_(v),F_(v)&S_(s),and F_(s)&_(s).Our study of the HR characteristics in different types of sources reveals that accretion-powered neutron star(NS)low-mass X-ray binaries(LMXBs)exhibit softer energy spectra than NS high-mass X-ray binaries(HMXBs),but harder energy spectra than black hole binaries in most *** difference is probably due to their different magnetic field ***,Fv&Sv LMXBs tend to be harder than Fv&Ss LMXBs below 7 keV,while the opposite is true for *** results suggest that LMXBs may dominate unclassified sources,and NS binaries are likely to be the primary type of X-ray binaries with ambiguous compact *** comparing the HR of transient sources in their outburst and low-flux states,it is found that the averaged HR of four sources in the two states are roughly comparable within *** also investigate the spatial properties of the three groups and find that Fv&Sv sources are mainly located in the longitude of-20°nantly concentrated in 19°

关键词： catalogs-surveys-methods data analysis-X-rays general