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Effect of Heat Treatment on Microstructure and Property of Al-Sn-Pb Bearing Material

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Journal of Iron and Steel Research International 2006年第2期13卷 73-76页

作者： xu Guang-ming li Bao-mian CUI Jian-zhong Key Laboratory of Electromagnetic Processing of Materials Ministry of Education Northeastern University Shenyang 110004 Liaoning China

AlSn8Pb2Si2.5Cu0.8Cr0.2 is a bush material with high hardness, and the main elements tin and plumbum mainly exist along the grain boundary, resulting in bad plasticity and confectioning. It is found that the continuous tin and lead distributing along grain boundary are broken by cold-rolling, and their shape is spheroidized and uniform through annealing at constant temperature. The continuous precipitated phase composed of tin and lead doesn＇t exist along grain boundary. The properties of bush material are greatly increased.

关键词： bush material cold-rolling annealing spheroidization

Interfacial Microstructure of Al-Sn-Pb Alloy/Steel During liquid-Solid Bonding Rolling

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Journal of Iron and Steel Research International 2006年第4期13卷 40-43页

作者： xu Guang-ming li Bao-mian CUI Jian-zhong Key Laboratory of Electromagnetic Processing of Materials Northeastern UniversityShenyang 110004 Liaoning China

Studies were conducted on the interfacial microstructure of a steel/liquid aluminium and its evolution during the bonding rolling process. The effects of wetting time and deformation on the diffusion layer and on the bonding strength were examined. By means of electron microscopy and electron probe analysis, it was found that the diffusion layer is mainly composed of FeAI3. For a steel temperature of 250℃ and an aluminium temperature of 850 ~C, the diffusion layer was formed within 3 s, and the shear strength of the samples increased after 8 to 14 s. Although the interface was not damaged, it was deformed notably. For an aluminium temperature of 750℃ and a wetting time of 11 to 17 s, the shear strength of the interface remained high, but the interface was obviously broken during rolling, leading to reduced bonding strength.

关键词： liquid-solid bonding rolling wetness diffusion layers interracial strength

Determination of Pesticide Residue Cartap Using a Sensitive Fluorescent Probe

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Journal of Integrative Agriculture 2012年第11期11卷 1861-1870页

作者： JING xu DU li-ming WU Hao WU Wen-ying CHANG Yin-xia Analytical and Testing Center Shanxi Normal University Linfen 041000 P.R.China

The insecticide cartap （CP） is non-fluorescent in aqueous solutions. This property makes its determination through direct fluorescent method difficult. In acidic medium and at room temperature, palmatine （PAL） can react with cucurbit[7]uril （CB[7]） to form stable complexes, and the fluorescence intensity of the complex is greatly enhanced. Significant quenching of the fluorescence intensity of the CB[7]-PAL complex was observed with the addition of cartap. Based on the significant quenching of the supramolecular complex fluorescence intensity, a new spectrofluorimetric method with high sensitivity and selectivity was developed to determine cartap in aqueous solution. The fluorescence quenching values （AF） showed good linear relationship with cartap concentrations from 0.009 to 2.4 ~tg mL-~ with a detection limit 0.0029 ~tg mE-x. The proposed method had been successfully applied to the determination of cartap residues in grain and vegetable with recoveries of 87.4-103%. In addition, the association constants of the complexes formed between the host and the guest were determined. The competing reaction and the supramolecular interaction mechanisms between the cartap and PAL as they fight for occupancy of the CB[7] cavity were studied using spectrofluorimetry, xH NMR and molecular modeling calculations.

关键词： cartap cucurbituril palmatine fluorescent probe

H_∞ Control for 2-D Discrete State Delayed Systems in the Second FM Model

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自动化学报 2008年第7期34卷 809-813页

作者： xu Jian-ming YU li College of Information Engineering Zhejiang University of Tech-nology Hangzhou 310014 P. R. China

这份报纸涉及 H 控制的问题为二维(2-D ) 分离州的延期系统由第二 Fornasini 和 Marchesini (FM ) 描述了州空间当模特儿。为这个 2-D 系统有 H 噪音变细的一个足够的条件以某个线性矩阵不平等(LMI ) 被给。最佳的 H 控制器被解决一个... 详细信息

这份报纸涉及 H 控制的问题为二维(2-D ) 分离州的延期系统由第二 Fornasini 和 Marchesini (FM ) 描述了州空间当模特儿。为这个 2-D 系统有 H 噪音变细的一个足够的条件以某个线性矩阵不平等(LMI ) 被给。最佳的 H 控制器被解决一个凸的优化问题获得。最后，一个模拟例子被给说明建议结果的有效性。

关键词：二维离散系统控制方法计算方法自动化技术智能系统

Inflammatory bowel disease unclassified

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2011年第4期12卷 280-286页

作者： Ning ZHOU Wei-xing CHEN Shao-hua CHEN Cheng-fu xu You-ming li Department of Gastroenterology the First Affiliated Hospital College of Medicine Zhejiang University Hangzhou 310003 China

Objective:Inflammatory bowel diseases (IBDs) are idiopathic,chronic,and inflammatory intestinal *** two main types,ulcerative colitis (UC) and Crohn's disease (CD),sometimes mimic each other and are not readily *** purpose of this study was to present a series of hospitalized cases,which could not initially be classified as a subtype of IBD,and to try to note roles of the terms indeterminate colitis (IC) and inflammatory bowel disease unclassified (IBDU) when such a dilemma ***:Medical records of 477 patients hospitalized due to IBD,during the period of January 2002 to April 2009,were retrospectively studied in the present *** available previous biopsies from endoscopies of these patients were ***:Twenty-seven of 477 IBD patients (5.7%) had been initially diagnosed as having *** them,23 received colonoscopy and histological examinations in our hospital.A total of 90% (9/10) and 66.7% (4/6) of patients,respectively,had a positive finding via wireless capsule endoscopy (CE) and double-balloon enteroscopy (DBE).The barium-swallow or small bowel follow-through (SBFT) was performed on 11 *** changes were observed under computer tomographic (CT) scanning in 89.5% (17/19) of *** treatment strategies were employed for all ***:Our data indicate that IBDU accounts for 5.7% of initial diagnoses of *** definition of IBDU is valuable in clinical *** those who had no clear clinical,endoscopic,histological,or other features affording a diagnosis of either UC or CD,IBDU could be used parenthetically.

关键词： Inflammatory bowel disease unclassified Ulcerative colitis Crohn’s disease Subtype Diagnosis

Relation Between Endodormancy Induction and Changes in Two Main Electron Transport Pathways of Nectarine Buds

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Agricultural Sciences in China 2008年第10期7卷 1203-1209页

作者： YU Qin GAO Dong-sheng xu Xiao-ming li Jin xu Chen-shan State Key Laboratory of Crop Biology College of Horticulture Science and Engineering Shandong Agricultural University Tai＇an271018. P.R.China

Operation regulations of two main electron transport pathways in nectarine （Prunus persica var. nectariana cv. Shuguang） buds during endodormancy induction were studied to understand possible roles which two main electron transport pathways played in the buds of deciduous fruit trees during endodormancy induction. Respiratory inhibitors （KCN and SHAM） were used to investigate total respiration rate （Vt）, the development and operation of the alternative pathway and partitioning of electrons between the cytochrome and alternative pathways in nectarine buds during endodormancy induction. Results indicated that changes of Vt in flower and leaf buds showed single and double hump-shaped curves, respectively. In endodormancy induction, the capacity （Valt,） and activity （ρValt） of the alternative pathway rapidly increased, but changes of them had different patterns during the entire measuration. At the same time, changes of engagements of the alternative （ρValt/Vt） and cytochrome pathway （ρ′Vcyt/Vt） were opposite, and ρ′Vcyt/Vt was always further higher than ρValt/Vt during the entire measuration. All these results indicated that the development and operation of the alternative pathway played important roles in endodormancy induction, but the cytochrome pathway was the main pathway for mitochondrial electron transport in buds during endodormancy induction.

关键词： nectarine buds endodormancy induction cytochrome pathway alternative pathway

Integrated Chinese and Western medicine in the treatment of a patient with podocyte infolding glomerulopathy:A case report

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World Journal of Clinical Cases 2023年第19期11卷 4684-4691页

作者： Mei-Ying Chang Yu Zhang ming-xu li Fang xuan Department of Nephrology Xiyuan HospitalChina Academy of Chinese Medical SciencesBeijing 100091China Department of Nephrology First Medical Center of Chinese PLA General HospitalNephrology Institute of the Chinese People’s Liberation ArmyState Key Laboratory of Kidney DiseasesNational Clinical Research Center for Kidney DiseasesBeijing Key Laboratory of Kidney Disease ResearchBeijing 100853China

BACKGROUND Podocyte infolding glomerulopathy(PIG)is a newly described and rare glomerular *** date,only approximately 40 cases have been reported *** SUMMARY A 26-year-old female patient presented to our hospital with a complaint of intermittent edema of both lower limbs over the past 2 *** patient was diagnosed with *** was prescribed corticosteroid therapy in other hospitals during the initial stage,to which she had responded poorly and had developed femoral head ***,we administered immunosuppressants,reninangiotensin system inhibitors,combined with traditional Chinese *** patient was followed for 1 year,during which her clinical condition *** Integrated Chinese and Western medicine may be effective for PIG treatment,which requires active intervention to improve prognosis.

关键词： Corticosteroid therapy Immunosuppressive agents Podocyte-infolding glomerulopathy Renin-angiotensin system Traditional Chinese medicine Case report

Kinetic study of liMn2O4 in process of lithium intercalation

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Journal of Central South University of Technology 2005年第z1期12卷 72-75页

作者： xu ming-fei li Xing-hai CHEN Qi-yuan School of Metallurgical Science and Engineering Central South University Changsha 410083China School of Chemistry and Chemical Engineering Central South University Changsha 410083China School of Metallurgical Science and Engineering Central South University Changsha 410083China School of Chemistry and Chemical Engineering Central South University Changsha 410083China

Exchange current density of spinel liMn2 O4 was studied by linear polarization. The relationship of the kinetic property with the structure of spinel liMn2 O4 was investigated by studying the effect of the doping and surface coating on the kinetic properties of electrode material. The results show that the exchange current density of spinel liMn2 O4 electrode increases with the increase of the amount for lithium intercalation at first, and then decreases. The maximal exchange current density appeares at the 80%-90% lithium intercalation. The similar phenomenon was observed on the doped spinel liMn2 O4 electrode. Doping can enhance the exchange current density of spinel liMn2 O4 material. However, the degree of the doping effect varies with the doped element varying. Surface coating can also enhance the exchange current density of spinel material, and the increment of value is higher than that of doped ones.

关键词： kinetic exchange current density spinel liMr2O4 doping surface coating

Association between childhood obesity and gut microbiota:16S rRNA gene sequencing-based cohort study

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World Journal of Gastroenterology 2024年第16期30卷 2249-2257页

作者： xu-ming li Qing Lv Ya-Jun Chen Lu-Biao Yan Xin Xiong Laboratory Department Nanjing Medical University Affiliated Obstetrics and Gynecology Hospital(Nanjing Maternal and Child Health Hospital)Nanjing 210004Jiangsu ProvinceChina Department of Pediatrics Shenzhen University General HospitalShenzhen 518055Guangdong ProvinceChina Department of Inspection Division Women’s Hospital of Nanjing Medical University(Nanjing Maternity and Child Health Care Hospital)Nanjing 210004Jiangsu ProvinceChina Department of Pediatrics Women’s Hospital of Nanjing Medical University(Nanjing Maternity and Child Health Care Hospital)Nanjing 210004Jiangsu ProvinceChina Department of Neonatology Chenzhou First People’s HospitalChenzhou 423000Hunan ProvinceChina

BACKGROUND This study aimed to identify characteristic gut genera in obese and normal-weight children(8-12 years old)using 16S rDNA *** research aimed to provide insights for mechanistic studies and prevention strategies for childhood *** normal-weight and thirty age-and sex-matched obese children were *** and body measurements were collected,and fecal samples underwent 16S rDNA *** differences in body mass index(BMI)and body-fat percentage were observed between the *** of gut microbiota diversity revealed lowerα-diversity in obese *** in gut microbiota composition were found between the two *** and Firmicutes were more abundant in the obese group,while Bacteroides and Sanguibacteroides were more prevalent in the control *** To identify the characteristic gut genera in obese and normal-weight children(8-12-year-old)using 16S rDNA sequencing,and provide a basis for subsequent mechanistic studies and prevention strategies for childhood *** Thirty each normal-weight,1:1 matched for age and sex,and obese children,with an obese status from 2020 to 2022,were included in the control and obese groups,*** information was collected through questionnaires and body measurements were obtained from both obese and normal-weight *** samples were collected from both groups and subjected to 16S rDNA sequencing using an Illumina MiSeq sequencing platform for gut microbiota diversity *** Significant differences in BMI and body-fat percentage were observed between the two *** Ace and Chao1 indices were significantly lower in the obese group than those in the control group,whereas differences were not significant in the Shannon and Simpson ***-Wallis tests indicated significant differences in unweighted and weighted UniFrac distances between the gut microbiota of normal-weight and obese children(P<0.01),suggest

关键词： Childhood obesity Gut microbiota 16S rDNA sequencing Diversity analysis Genus identification Body mass index