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Local magnetic moment oscillation around an Anderson impurity on graphene

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Science China(Physics,Mechanics & Astronomy) 2025年第1期Mechanics & Astronomy) .卷 192-201页

作者： Shuai Li zhen Ma Jin-Hua gao School of Science Hebei University of Science and Technology School of Electronics and Information Zhengzhou University of Light Industry School of Physics and Wuhan National High Magnetic Field Center Huazhong University of Science and Technology

We theoretically investigate the spin resolved Friedel oscillation （FO） and quasiparticle interference （QPI） in graphene induced by an Anderson *** the impurity becomes magnetic,the resulted FO becomes spin dependent,which gives rise to a local magnetic moment oscillation with an envelop decaying as r-2in real space in the doping ***,at half filling,the electron density and local magnetic moment will not oscillate but decay as *** spin resolved FO has both sublattice and spin ***,the local magnetic moment decay at half filling only occurs at one sublattice of graphene,which is quite like the phenomenon observed in the STM experiment (***ález-Herrero et al.,Science 352,437 （2016）).We further give an analytic formula about such spin dependent FO based on the stationary phase ***,we study the interference of quasiparticles around the magnetic impurity by calculating the spin dependent Fourier-transformed local density of states （FT-LDOS）.Our work gives a comprehensive understanding about the local magnetic moment oscillation around an Anderson impurity on graphene.

关键词： Friedel oscillation local magnetic moment graphene Anderson impurity

Effect of Glutamine Supplementation on Intestinal Mucosal Protein,DNA and Mucosal Morphology of Early-Weaned Piglets

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Agricultural Sciences in China 2002年第12期1卷 1376-1381页

作者： ZHANG jun-min and gao zhen-chuan(Institute of Animal Science , Chinese Academy of Agricultural Sciences , Beijing 100094 . P. R. China) Institute of Animal Science Chinese Academy of Agricultural Sciences Beijing 100094 F. R. China

Forty piglets weaned at 21 days age were randomly assigned to one of two groups. The treatment group contained 1. 2% glutamine. The diets were calculated to be isonitrogenous and isoenergetic, each treatment contained five replicates of four piglets. Five piglets from each dietary treatment were killed at 35 days and 49 days age. The results showed that dietary glutamine supplementation increased jejunal DNA content of piglets in the treatment group at 35 days and 49 days age. There was no significant change of ileum DNA content and intestinal protein content between the treatment and control ones. Dietary glutamine supplementation increased mucosal thickness of piglets in treatment group markedly at 35 days age. The intestinal villus heights were significantly higher in treatment than that in control. The results of electron micrograph showed that dietary glutamine supplementation prevented deterioration of intestinal epithelium, and maintained normal intestinal microvillus structure. The results suggested that glutamine supplementation prevented villus atrophy, and had protective effect on intestinal structure.

关键词： Glutamine Early-weaned piglet Intestinal mncosal morphology

Effect of Glutamine Supplementation on Abilities of Antioxidative and y-glutamyl Transpeptidase Activities in Liver and Intestine of Piglets Fed Diets Containing Raw Soybean

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Agricultural Sciences in China 2003年第4期2卷 435-440页

作者： ZHANG jun-min, gao zhen-chuan, WANG Lian-di, JIANG Yun-xia and ZHANG QiInstitute of Animal Science , Chinese Academy of Agricultural Sciences , Beijing 100094 , P. R. China Institute of Animal Science Chinese Academy of Agricultural Sciences Beijing 100094 P. R. China

Eighteen male piglets weaned at 28 days age were randomly assigned to one of three treatments (1% glutamate. 1% and 2% glutamine supplementation). The basal diet contained 5% raw soybean. The diets were calculated to be isonitrogenous and isoenergetic. The level of plasma glutahione(GSH) increased markedly in piglets fed glutamine, and the response was related to dose. In treatments I and I , the levels of plasma GSH were significantly higher than that in the control at the 35 days age (Pjunum and ileum. The results showed that dietary glutamine supplementation increased the level of plasma GSH, and decreased γ-GT activities.

关键词： Glutamine Piglets Antioxidative Y-glutamyl transpeptidase activities

Diagnostic Values of Vascular Endothelial Growth Factor and Epidermal Growth Factor Receptor for Benign and Malignant Hydrothorax

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Chinese Medical Journal 2015年第3期128卷 305-309页

作者： Yan Gu Min Zhang Guo-Hua Li jun-zhen gao Liping Guo Xiao-Juan Qiao Li-Hong Wang Lan He Mei-Ling Wang Li Yan Xiu-Hua Fu Department of Respiratory Medicine Affiliated Hospital of Inner Mongolia Medical University Hohhot Inner Mongolia 010059 China Health Center Affiliated Hospital of Inner Mongolia Medical University Hohhot Inner Mongolia 010059 China

Background： Hydrothorax, as one of the common complications of malignant tumors, still cannot be sensitively detected in clinical practice, thus requiring a sensitive, specific method for diagnosis. The aim of this study was to analyze the correlation between levels of vascular endothelial growth factor （VEGF） and epidermal growth factor receptor （EGFR） in patients with benign and malignant hydrothorax. Methods： The contents of VEGF in the pleural effusion and serum of the patients with malignant pleural effusion （n = 35） and benign pleural effusion （n = 30） were detected by double antibody sandwich enzyme linked immunosorbent assay. The gene copy number level of EGFR in pleural effusion was detected by fluorescence in situ hybridization （FISH）. The points with the highest sensitivity and specificity were selected as the critical values to calculate the diagnostic value of the VEGF in pleural effusion and serum, and EGFR gene copy number in pleural effusion. Results： The contents of VEGF in pleural effusion and serum of patients with malignant hydrothorax were （384.91 ± 120.18）, and （129.62 ±46.35） ng/L, respectively, which were significantly higher than those of the patients with benign hydrothorax （207.97 ± 64.04）, （63.49 ± 24.58） ng/L （P 〈 0.01 ）. The sensitivity and specificity of detecting VEGF in pleural effusion were 80.0% and 96.7% （the boundary value was 297.06 ng/L）, respectively for diagnosing benign and malignant hydrothorax. The sensitivity and specificity of serum were 74.3% and 96.7%, respectively （the boundary value was 99.21 ng/L） for diagnosing benign and malignant hydrothorax. The diagnostic efficiencies of EGFR and VEGF in hydrothorax were similar. There was a significant correlation between EGFR and VEGF in hydrothorax （P 〈 0.01 ）. Conclusions： VEGF and EGFR play important roles in the formation of pleural effusion. VEGF differed significantly in benign and malignant pleural effusions, which contributed to differential diagnosis results of benig

关键词： Enzyme-linked hnmunosorbent Assay Epidermal Growth Factor Receptor Fluorescence In Situ Hybridization Hydrothorax Vascular Endothelial Growth Factor

Pretreatment red blood cell distribution width as a predictive marker for postoperative complications after laparoscopic pancreatoduodenectomy

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 143-157页

作者： Xian-Rang Cao Yin-Long Xu Jia-Wei Chai Kai zheng jun-Jie Kong jun Liu Shun-zhen zheng Department of Liver Transplantation and Hepatobiliary Surgery Shandong Provincial Hospital Affiliated to Shandong First Medical UniversityJinan 250021Shandong ProvinceChina Department of Breast and Thyroid Surgery Shandong Provincial Maternal and Child Health Care HospitalJinan 250014Shandong ProvinceChina

BACKGROUND Red blood cell distribution width(RDW)is associated with the development and progression of various *** To explore the association between pretreatment RDW and short-term outcomes after laparoscopic pancreatoduodenectomy(LPD).METHODS A total of 804 consecutive patients who underwent LPD at our hospital between March 2017 and November 2021 were retrospectively *** between pretreatment RDW and clinicopathological characteristics and short-term outcomes were *** Patients with higher pretreatment RDW were older,had higher Eastern Cooperative Oncology Group scores and were associated with poorer short-term outcomes than those with normal *** pretreatment RDW was an independent risk factor for postoperative complications(POCs)(hazard ratio=2.973,95%confidence interval:2.032-4.350,P<0.001)and severe POCs of grade IIIa or higher(hazard ratio=3.138,95%confidence interval:2.042-4.824,P<0.001)based on the Clavien-Dino classification *** analysis showed that high pretreatment RDW was an independent risk factor for Clavien-Dino classi-fication grade IIIb or higher POCs,a comprehensive complication index score≥26.2,severe postoperative pancreatic fistula,severe bile leakage and severe *** pretreatment RDW was positively associated with the neutrophil-to-lymphocyte ratio and platelet-to-lymphocyte ratio and was negatively associated with albumin and the prognostic nutritional *** Pretreatment RDW was a special parameter for patients who underwent *** was associated with malnutrition,severe inflammatory status and poorer short-term *** could be a surrogate marker for nutritional and inflammatory status in identifying patients who were at high risk of developing POCs after LPD.

关键词： Biomarker Laparoscopic pancreatoduodenectomy Postoperative complication Red blood cell distribution width Short-term outcomes

Structural and microwave absorption properties of CoFe_(2)O_(4)/residual carbon composites

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 221-232页

作者： Yuanchun Zhang Shengtao gao Xingzhao Zhang Dacheng Ma Chuanlei Zhu jun He Joint National-Local Engineering Research Centre for Safe and Precise Coal Mining Anhui University of Science and TechnologyHuainan 232001China School of Chemical and Blasting Engineering Anhui University of Science and TechnologyHuainan 232001China

Electromagnetic interference,which necessitates the rapid advancement of substances with exceptional capabilities for bsorbing electromagnetic waves,is of urgent concern in contemporary *** this work,CoFe_(2)O_(4)/residual carbon from coal gasification fine slag(CFO/RC)composites were created using a novel hydrothermal *** mechanisms for microwave absorption,including conductive loss,natural resonance,interfacial dipole polarization,and magnetic flux loss,are involved in these ***,compared with pure residual carbon materials,this composite offers superior capabilities in microwave *** 7.76GHz,the CFO/RC-2 composite achieves an impressive minimum reflection loss(RL_(min))of-43.99 dB with a thickness of 2.44 ***,CFO/RC-3 demonstrates an effective absorption bandwidth(EAB)of up to 4.16 GHz,accompanied by a thickness of *** study revealed the remarkable capability of the composite to diminish electromagnetic waves,providing a new generation method for microwave absorbing materials of superior quality.

关键词： coal gasification slag residual carbon hydrothermal method microwave absorption CoFe_(2)O_(4)

RNA干扰阻断CXCR4基因对胰腺癌AsPC-1细胞侵袭转移的影响

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世界华人消化杂志 2016年第9期24卷 1342-1348页

作者：黄继英高振军沈曼茹孟鑫复旦大学附属中山医院青浦分院消化科上海市201700 复旦大学附属中山医院青浦分院医院感染管理科上海市201700

目的:观察针对CXCR4基因慢病毒Lentiviral(LV)介导的RNAi转染胰腺癌细胞株As PC-1后细胞增殖、迁移、侵袭的影响,探讨可能机制.方法:人CXCR4基因干扰靶点设计后成功转染人胰腺癌细胞系As PC-1细胞,然后分为转染组(LV-si CXCR4-1)、阴性... 详细信息

目的:观察针对CXCR4基因慢病毒Lentiviral(LV)介导的RNAi转染胰腺癌细胞株As PC-1后细胞增殖、迁移、侵袭的影响,探讨可能机制.方法:人CXCR4基因干扰靶点设计后成功转染人胰腺癌细胞系As PC-1细胞,然后分为转染组(LV-si CXCR4-1)、阴性对照组(As PC-1-LV-con)和空白对照组(AsP C-1细胞),实验组加入基质细胞衍生因子-1α(stromal cell-derived factor-1α,SDF-1α),MTT法检测细胞增殖,迁移实验检测细胞迁移,Transwell检测细胞的体外侵袭,Western blot检测血管内皮生长因子(vascular endothelial growth factor,VEGF)、基质蛋白金属酶(matrix metalloproteinases,MMP)2和MMP9的表达.结果:在SFM或10%NCS培养条件下,SDF-1α均可刺激As PC-1细胞、As PC-1-LV-Con细胞增殖(P<0.01),对LV-si CXCR4-1增殖均无明显促进作用;SDF-1α可促进As PC-1、As PC-1-LV-C o n细胞迁移和侵袭(P<0.01),对LVsi CXCR4-1无明显促进作用;在SDF-1α作用下,LV-si CXCR4-1细胞的MMP9及VEGF的蛋白表达低于As PC-1、As PC-1-LV-Con细胞(P<0.01).结论:CXCR4基因RNAi可显著抑制SDF-1α引起的As PC-1细胞的增殖、体外迁移和侵袭,进一步证实SDF-1/CXCR4受体配体系统参与了胰腺癌的增殖、侵袭及转移,通过RNAi技术可抑制胰腺癌细胞的增殖、侵袭及转移.

关键词：胰腺肿瘤基质细胞衍生因子-1 受体 CXCR4 RNA干扰

Forced convection rheoforming process for preparation of 7075 aluminum alloy semisolid slurry and its numerical simulation

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Transactions of Nonferrous Metals Society of China 2014年第4期24卷 1109-1116页

作者：周冰康永林朱国明郜俊震祁明凡张欢欢北京科技大学材料科学与工程学院北京100083 北京科技大学新金属材料国家重点实验室北京100083

A self-developed forced convection rheoforming （FCR） machine for the preparation of light alloy semisolid slurry was introduced. The microstructure characteristics of 7075 aluminium alloy semisolid slurry at different stirring speeds prepared by the FCR process were analyzed. The experimental results suggest that with the increase of the stirring speed, the mean grain size of the semisolid decreases and the shape factor as well as the number of primary grains increase. Meanwhile, the preparation process of semisolid slurry was numerically simulated. The flow characteristics of the melt in the device and the effect of the stirring speed on temperature field and solid fraction of the melt were investigated. The simulated results show that during the preparation process of semisolid slurry, there is a complex convection within the FCR device that obviously changes the temperature field distribution and solid fraction of the melt. When the convection intensity increases, the scope of the undercooling gradient of the melt is reduced and temperature distribution is improved.

关键词： 7075 aluminum alloy forced convection rheoforming (FCR) semisolid slurry preparation numerical simulation

基于光纤光栅传感器的高压开关柜温度监测系统的研究

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沈阳工程学院学报（自然科学版） 2016年第4期12卷 340-344页

作者：从军超高振国沈阳工程学院电力学院辽宁沈阳110136

鉴于高压开关柜高电压、强磁场的工作环境,提出了采用光纤光栅传感器监测开关触头温度的方案,并给出了温度监测系统的整体结构以及各部分的功能。针对裸光栅温度灵敏度系数低且易受交叉应力影响的问题,在光栅传感原理的基础上,设计了一... 详细信息

鉴于高压开关柜高电压、强磁场的工作环境,提出了采用光纤光栅传感器监测开关触头温度的方案,并给出了温度监测系统的整体结构以及各部分的功能。针对裸光栅温度灵敏度系数低且易受交叉应力影响的问题,在光栅传感原理的基础上,设计了一种增敏型封装保护的光纤光栅温度传感器,经对比实验分析表明,增敏封装之后的传感器较裸光栅传感器的温度灵敏系数提高了近7倍,并且将外界应力的影响降到了最低,具有一定的工程实际意义。

关键词：高压开关柜光纤光栅温度监测增敏封装