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Phase field modeling of grain stability of nanocrystalline alloys by explicitly incorporating mismatch strain

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Rare Metals 2024年第7期43卷 3370-3382页

作者： Min zhou hong-Hui Wu Yuan Wu Hui Wang Xiong-Jun Liu Sui-He Jiang xiao-Bin Zhang Zhao-Ping Lu Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and MaterialsUniversity of Science and Technology BeijingBeijing 100083Cnina Institute for Carbon Neutrality University of Science and TechnologyBeijing 100083China Institute of Materials Intelligent Technology Liaoning Academy of MaterialsShenyang 110004China

Ab st ra ct Nanocrystalline materials exhibit unique properties due to their extremely high grain boundary(GB) ***,this high-density characteristic induces grain coarsening at elevated temperatures,thereby limiting the widespread application of nanocrystalline *** experimental observations revealed that GB segregation and second-phase pinning effectively hinder GB migration,thereby improving the stability of nanocry stalline *** this study,a mouified phase-field model that integrates mismatch strain,solute segregation and precipitation was developed to evaluate the influence of lattice misfit on the thermal stability of nanocrystalline *** simulation results indicated that introducing a suitable mismatch strain can effectively enhance the microstructural stability of nanocrystalline *** synergizing precipitation with an appropriate lattice misfit,the formation of second-phase particles in the bulk grains can be suppressed,thereby facilitating solute segregation/precipitation at the *** concentrated solute segregation and precipitation at the GBs effectively hinders grain migration,thereby preventing grain *** findings provide a new perspective on the design and regulation of nanocrystalline alloys with enhanced thermal stability.

关键词： Phase field model Mismatch strain Second-phase precipitation Grain boundary segregation Nanocrystalline alloys

青风藤活性成分对糖尿病db/db小鼠氧化应激、炎症反应及免疫功能的影响

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河北中医药学报 2024年第4期39卷 1-7页

作者：刘均广冯智丽李猛高钰周晓红陈香美高维娟承德医学院病理生理学教研室河北承德067000 河北中医药大学/河北省心脑血管病中医药防治研究重点实验室石家庄050091 中国人民解放军总医院第一医学中心肾脏病医学部北京100853

目的:探讨青风藤活性成分对糖尿病(diabetes mellitus,DM)db/db小鼠肾脏的保护作用及其机制研究。方法:30只6周龄雄性db/db小鼠随机分为模型组(等体积生理盐水),阳性组(195 mg/kg/d羟苯磺酸钙),盐酸青藤碱(Sinomenine Hydrochloride,SH... 详细信息

目的:探讨青风藤活性成分对糖尿病(diabetes mellitus,DM)db/db小鼠肾脏的保护作用及其机制研究。方法:30只6周龄雄性db/db小鼠随机分为模型组(等体积生理盐水),阳性组(195 mg/kg/d羟苯磺酸钙),盐酸青藤碱(Sinomenine Hydrochloride,SH)低、中、高剂量组(31.2、62.4、124.8 mg/kg/d SH)5组,同时选取6只同周龄db/m小鼠设为对照组(等体积生理盐水),每日1次,定时灌胃给药,连续6 w。于12 w末观察各组小鼠一般情况,检测尿微量白蛋白(mAlb)、血肌酐(SCr)和血尿素氮(BUN)水平;试剂盒检测肾组织匀浆中丙二醛(MDA)、还原型谷胱甘肽(GSH)和超氧化物歧化酶(SOD)的水平;Luminex多因子检测技术测定血清肿瘤坏死因子-α(TNF-α)、白细胞介素-1β(IL-1β)、白细胞介素-6(IL-6)和白细胞介素-10(IL-10)的含量;ELISA法检测血清免疫球蛋白G(IgG)、免疫球蛋白M(IgM)、免疫球蛋白A(IgA)及补体蛋白3(C3)的水平;苏木精-伊红(HE)和过碘酸-雪夫(PAS)染色观察肾脏组织病理形态变化;透射电镜观察肾脏超微结构的改变。结果:与模型组比较,阳性组和SH低、中、高剂量组小鼠mAlb、SCr和BUN水平均降低(P<0.05);肾组织匀浆中MDA水平降低(P<0.05),GSH水平和SOD活性均升高(P<0.05);血清中TNF-α、IL-1β、IL-6、IgG、IgM、IgA和补体C3水平均降低(P<0.05),IL-10水平升高(P<0.05);镜下肾小球损伤及肾小管上皮水肿情况均有所改善,肾组织损伤减轻。结论:青风藤活性成分对DM db/db小鼠的肾脏具有保护作用,其作用机制可能与改善氧化应激反应,缓解炎症反应及提高免疫功能有关。

关键词：青风藤糖尿病db/db小鼠氧化应激炎症反应免疫功能

New Isomeric States in ^(197)Bi

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Chinese Physics Letters 1996年第1期13卷 13-16页

作者： zhou xiao-hong SUN Xiang-fu GUO Ying-xiang LEI Xiang-guo CHEN Xin-feng LIU Zhong ZHANG Yu-hu JIN Han-juan LUO Yi-xiao WEN Shu-xian YUAN Guan-jun LI Guang-sheng YANG Chun-xiang Institute of Modern Physics Academia SinicaLanzhou 730000 China Institute of Atomic Energy Beijing 102413

The high-spin states in ^(197)Bi have been studied with the ^(187)Re(^(16)O,6n)reaction at ^(16)O energies from 85 to ***-beam measurements of γ-ray excitation functions,γ-γ-t coincidences and γ-ray angular distributions were carried out with six BGO(AC)HPGe detectors and one intrinsic Ge planar *** new tram sitions and three new isomers were observed,and a level scheme for ^(197)Bi was *** differences between the present work and the previous results were found.

关键词： detector isomers

A High-Spin Isomer in ^(198)Bi

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Chinese Physics Letters 1996年第8期13卷 576-578页

作者： zhou xiao-hong SUN Xiang-fu GUO Ying-xiang LEI Xiang-guo CHEN Xin-feng LIU Zhong ZHANG Yu-hu JIN Han-juan LUO Yi-xiao WEN Shu-xian YUAN Guan-jun LI Guang-sheng YANG Chun-xiang Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000 China Institute of Atomic Energy Beijing 102413

High-spin states in ^(198)Bi were populated via the ^(187)Re(^(16)O,5n)reaction.A partial level scheme for ^(198)Bi was established for the first time,including a 15^(+)high-spin isomeric state with a measured half-life of 8.0±*** comparing the level structure of ^(198)Bi with that of the even-even core ^(198)Pb,the configuration v(i_(13/2))^(-2) v(P_(3/2))^(-1)π(h_(9/2))^(1) was ascribed to this isomeric state.

关键词： reaction state

The Introduction, Selection and Application of Beijing Wild Groundcover Plants

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中国园林 2007年第8期 17-19页

作者： ZHAO xiao-yan, GAO Da-wei, zhou xiao-hong

An investigation into the wild cover plants in circumjacent habitat of Beijing, has been launched under the subject "Studies on the cognition

关键词： Wild The Introduction Selection and Application of Beijing Wild Groundcover Plants

Roles of Cu doping in YbZn_(2)Sb_(2) for thermoelectric performance enhancement

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Rare Metals 2024年第6期43卷 2869-2875页

作者： Xiong Zhang Hai-Hui Li xiao-Liang Cao Bin Zhang hong Wu Yu Zhang Guang Han Guo-Yu Wang Hao-Shuang Gu xiao-Yuan zhou College of Physics and Electronic Science Hubei Normal UniversityHuangshi 435002China Analytical and Testing Center Chongqing UniversityChongqing401331China School of Science Chongqing University of Posts and Telecommunications.Chongqing 400065 China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials-Hubei Key Laboratory of Ferro&Piezoelectric Materials and Devices Faculty of Physical and Electronic SciencesHubei UniversityWuhan 430062China College of Physics Chongqing UniversityChongqing 401331China

Recent research shows that increasing the carrier density after orbital alignment in AZn_(2)Sb_(2) (A=Ca,Yb,Eu,Sr,Mg)Zintl compounds yields remarkable results with regard to enhanced thermoelectric ***,research on carrier density increase via doping in these compounds is *** this study,we introduced Cu into the Zn sites in YbZn_(2)Sb_(2) and examined the thermoelectric properties.

关键词： properties doping performance

Impact of frailty on short-term postoperative outcomes in patients undergoing colorectal cancer surgery:A systematic review and meta-analysis

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World Journal of Gastrointestinal Surgery 2024年第3期16卷 893-906页

作者： Yao zhou xiao-Lei Zhang hong-Xia Ni Tian-Jing Shao Ping Wang Department of Operating Room Affiliated Tumor Hospital of Nantong University&Nantong Tumor HospitalNantong 226361Jiangsu ProvinceChina Department of Gastrointestinal Surgery The Affiliated Tumor Hospital of Nantong University&Nantong Tumor HospitalNantong 226361Jiangsu ProvinceChina

BACKGROUND Colorectal cancer is a major global health challenge that predominantly affects older *** management,despite advancements,requires careful consideration of preoperative patient status for optimal *** To summarize existing evidence on the association of frailty with short-term postoperative outcomes in patients undergoing colorectal cancer *** A literature search was conducted using PubMed,EMBASE and Scopus databases for observational studies in adult patients aged≥18 years undergoing planned or elective colorectal surgery for primary carcinoma and/or secondary *** studies that conducted frailty assessment using recognized frailty assess-ment tools and had a comparator group,comprising nonfrail patients,were *** effect sizes were reported as weighted mean difference or relative risk(RR)with 95%confidence intervals(CIs).RESULTS A total of 24 studies were *** with nonfrail patients,frailty was associated with an increased risk of mortality at 30 d(RR:1.99,95%CI:1.47-2.69),at 90 d(RR:4.76,95%CI:1.56-14.6)and at 1 year(RR:5.73,95%CI:2.74-12.0)of follow *** patients had an increased risk of any complications(RR:1.81,95%CI:1.57-2.10)as well as major complications(Clavien-Dindo classification grade≥III)(RR:2.87,95%CI:1.65-4.99)compared with the control *** risk of reoperation(RR:1.18,95%CI:1.07-1.31),readmission(RR:1.70,95%CI:1.36-2.12),need for blood transfusion(RR:1.67,95%CI:1.52-1.85),wound complications(RR:1.49,95%CI:1.11-1.99),delirium(RR:4.60,95%CI:2.31-9.16),risk of prolonged hospitalization(RR:2.09,95%CI:1.22-3.60)and discharge to a skilled nursing facility or rehabilitation center(RR:3.19,95%CI:2.0-5.08)was all higher in frail *** Frailty in colorectal cancer surgery patients was associated with more complications,longer hospital stays,higher reoperation risk,and increased *** frailty assessment appears crucial for tailored surgical managem

关键词： Frailty Frail adults Colorectal surgery Colorectal cancer Complications Mortality Survival Slinical outcomes Meta-analysis

RARRES2 regulates lipid metabolic reprogramming to mediate the development of brain metastasis in triple negative breast cancer

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Military Medical Research 2024年第1期11卷 34-49页

作者： Yi-Qun Li Fang-zhou Sun Chun-xiao Li hong-Nan Mo Yan-Tong zhou Dan Lv Jing-Tong Zhai Hai-Li Qian Fei Ma Department of Medical Oncology National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China State Key Laboratory of Molecular Oncology National Cancer Center/National Clinical Research Center for Cancer/Cancer HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100021China

Background Triple negative breast cancer(TNBC),the most aggressive subtype of breast cancer,is characterized by a high incidence of brain metastasis(BrM)and a poor *** the most lethal form of breast cancer,BrM remains a major clinical challenge due to its rising incidence and lack of effective treatment *** evidence suggested a potential role of lipid metabolic reprogramming in breast cancer brain metastasis(BCBrM),but the underlying mechanisms are far from being fully *** Through analysis of BCBrM transcriptome data from mice and patients,and immunohistochemical validation on patient tissues,we identified and verified the specific down-regulation of retinoic acid receptor responder 2(RARRES2),a multifunctional adipokine and chemokine,in BrM of *** investigated the effect of aberrant RARRES2 expression of BrM in both in vitro and in vivo *** signaling pathway components were evaluated using multi-omics *** were performed to elucidate the regulation of lipid metabolic reprogramming of *** We found that downregulation of RARRES2 is specifically associated with BCBrM,and that RARRES2 deficiency promoted BCBrM through lipid metabolic ***,reduced expression of RARRES2 in brain metastatic potential TNBC cells resulted in increased levels of glycerophospholipid and decreased levels of triacylglycerols by regulating phosphatase and tensin homologue(PTEN)-mammalian target of rapamycin(mTOR)-sterol regulatory element-binding protein 1(SREBP1)signaling pathway to facilitate the survival of breast cancer cells in the unique brain *** Our work uncovers an essential role of RARRES2 in linking lipid metabolic reprogramming and the development of ***2-dependent metabolic functions may serve as potential biomarkers or therapeutic targets for BCBrM.

关键词： RARRES2 Lipid metabolic reprogramming Brain metastasis(BrM) Breast cancer

Analysis of China's Electricity Price and Electricity Burden of Basic Industries under the Carbon Peak Target before 2030

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CSEE Journal of Power and Energy Systems 2024年第2期10卷 481-491页

作者： Yue Qiu Suyang zhou Wei Gu xiao-Ping Zhang School of Electrical Engineering Southeast UniversityNanjingChina School of Electronic Electrical and System EngineeringUniversity of BirminghamU.K.

The Chinese government is deepening reformation of electricity prices during the 14th Five Year Plan period and has set a carbon emission reduction target of reaching carbon peak before *** this context,will the carbon emission target influence electricity pricing and will electricity price influence competitiveness of Chinese main industries are two questions needing to be *** paper compares China's electricity price level with the selected major countries in the world,and four typical industries are selected to evaluate their electricity burden ***,the correlation between residential electricity price and industrial electricity price and the influencing factors is analyzed,from the perspectives of scale,structure and *** to the model obtained by regression analysis,the electricity price level and corresponding residential and industrial electricity burden in 2025 and 2030 are *** Terms-Electricity burden,industrial electricity price,regression analysis,residential electricity price.

关键词： Electricity burden industrial electricity price regression analysis residential electricity price