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Heterointerface engineering of rhombic Rh nanosheets confined on MXene for efficient methanol oxidation

Journal of Energy Chemistry 2024年第6期93卷 419-428,I0011页

作者： Qi Zhang Quanguo Jiang Xiang yang chi Zhang Jian Zhang Lu yang Haiyan He Guobing Ying Huajie Huang College of Materials Science and Engineering Hohai UniversityNanjing 210098JiangsuChina New Energy Technology Engineering Lab of Jiangsu Province College of ScienceNanjing University of Posts&Telecommunications(NUPT)Nanjing 210023JiangsuChina School of Materials Science and Engineering Southeast UniversityNanjing 211100JiangsuChina

Although metallic rhodium(Rh)is regarded as a promising platinum-alternative anode catalyst of direct methanol fuel cell(DMFC),the conventional"particle-to-face"contact model between Rh and matrix largely limits the overall electrocatalytic performance due to their insufficient cooperative ***,we report a controllable and robust heterointerface engineering strategy for the bottom-up fabrication of rhombic Rh nanosheets in situ confined on Ti_3C_(2)T_x MXene nanolamellas(Rh NS/MXene)via a convenient stereoassembly *** unique design concept gives the resulting 2D/2D Rh NS/MXene heterostructure intriguing textural features,including large accessible surface areas,strong"face-toface"interfacial interactions,homogeneous Rh nanosheet distribution,ameliorative electronic structure,and high electronic *** a consequence,the as-prepared Rh NS/MXene nanoarchitectures exhibit exceptional electrocatalytic methanol oxidation properties in terms of a large electrochemically active surface area of 126.2 m~2 g_(Rh)~(-1),a high mass activity of 1056.9 mA mg_(Rh)-~1,and a long service life,which significantly outperform those of conventional particle-shaped Rh catalysts supported by carbon black,carbon nanotubes,reduced graphene oxide,and MXene matrixes as well as the commercial Pt nanoparticle/carbon black and Pd nanoparticle/carbon black catalysts with the same noble metal loading *** functional theory calculations further demonstrate that the direct electronic interaction at the well-contacted 2D/2D heterointerfaces effectively enhances the adsorption energy of Rh nanosheets and induces a left shift of the d-band center,thereby making the Rh NS/MXene configuration suffer less from CO *** work highlights the importance of rational heterointerface design in the construction of advanced noble metal/MXene electrocatalysts,which may provide new avenues for developing the next-generation DMFC devices.

关键词： Rhodium nanosheet Ti_(3)C_(2)T_(x)MXene Heterointerface Electrocatalyst Fuel cell

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UPLC-MS/MS法测定广叶绣球菌不同生长阶段栽培基质中有机酸含量及其对菌丝生长的影响

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食药用菌 2024年第5期32卷 325-332页

作者：刘晓瑜肖冬来马璐杨驰林辉江晓凌福建省农业科学院食用菌研究所特色食用菌繁育与栽培国家地方联合工程研究中心福建福州350014

为探究绣球菌生长发育过程中有机酸的代谢情况,采用超高效液相色谱串联质谱法(UPLC-MS/MS),以负离子多反应监测(MRM)模式测定广叶绣球菌栽培基质未接种阶段(0 d)、菌丝阶段(40 d)、原基阶段(60 d)及子实体生长阶段(80 d)26种有机酸的含... 详细信息

为探究绣球菌生长发育过程中有机酸的代谢情况,采用超高效液相色谱串联质谱法(UPLC-MS/MS),以负离子多反应监测(MRM)模式测定广叶绣球菌栽培基质未接种阶段(0 d)、菌丝阶段(40 d)、原基阶段(60 d)及子实体生长阶段(80 d)26种有机酸的含量,并研究主要有机酸对菌丝生物量和菌丝生长速度的影响。结果表明:各有机酸在其线性范围内与峰面积呈良好的线性关系(r2≥0.99),检出限在2.0~100.0 ng/mL;有13种有机酸在各阶段均能检测到,其中苹果酸、L-焦谷氨酸、柠檬酸、D-葡萄糖醛酸和酒石酸变化趋势明显,浓度变化分别为113.222~13.826μg/g、41.349~1.418μg/g、16.821~46.399μg/g、15.653~96.850μg/g和4.125~66.550μg/g;酒石酸和L-焦谷氨酸在试验浓度0.02~0.20 g/L范围内均对菌丝生长有显著促进作用,柠檬酸和苹果酸则在添加浓度较高时对菌丝生长促进作用显著。研究有机酸在栽培过程中的变化趋势有利于探究绣球菌基质降解机理,同时也可将其作为安全的营养添加剂用于配方优化。

关键词：广叶绣球菌超高效液相色谱串联质谱法有机酸菌丝生长

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基于局部干法的核电水池覆面缺陷焊接修复工艺研究

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金属加工（热加工） 2024年第10期 65-69页

作者：周政杨驰郭方涛张潇朱加雷李守根李刚中核武汉核电运行技术股份有限公司湖北武汉430000 北京石油化工学院机械工程学院北京102617 核工业工程研究设计有限公司北京101310

针对核电站乏燃料水池钢覆面出现的腐蚀缺陷等问题,采用了局部干法水下TIG焊接的修复方法对覆板进行焊接修复。首先,利用设计的压力环境模拟系统进行0.3MPa压力范围内干式焊接试验,获得不同压力下的覆板焊接最佳工艺;基于干式环境最佳... 详细信息

针对核电站乏燃料水池钢覆面出现的腐蚀缺陷等问题,采用了局部干法水下TIG焊接的修复方法对覆板进行焊接修复。首先,利用设计的压力环境模拟系统进行0.3MPa压力范围内干式焊接试验,获得不同压力下的覆板焊接最佳工艺;基于干式环境最佳焊接参数,开展局部干法水下焊接工艺探索,并对焊接接头切样进行金相检测。宏观金相结果显示:焊缝成形良好,无裂纹、气孔;微观金相检测结果表明:显微组织基体为呈枝晶状的奥氏体,枝晶间为铁素体,未发现显微裂纹和夹杂物,为核电站乏燃料水池覆板的在役修复奠定了基础。

关键词：核电站局部干法 TIG 覆板

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Early peripheral perfusion index predicts 28-day outcome in patients with septic shock

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World Journal of Emergency Medicine 2024年第5期15卷 372-378页

作者： Cheng chi Hao Gong Kai yang Peng Peng Xiaoxia Zhang Department of Emergency Peking University People's HospitalBeijing 100044China Department of Emergency Intensive Care Unit the First Affi liated Hospital of Xinjiang Medical UniversityUrumqi 830000China

BACKGROUND:To investigate the prognostic value of the peripheral perfusion index(PPI)in patients with septic ***:This prospective cohort study,conducted at the emergency intensive care unit of Peking University People's Hospital,recruited 200 patients with septic shock between January 2023 and August *** patients were divided into survival(n=84)and death(n=116)groups based on 28-day *** evaluations included laboratory tests and clinical scores,with lactate and PPI values assessed upon admission to the emergency room and at 6 h and 12 h after *** factors associated with mortality were analyzed using univariate and multivariate Cox regression *** operator characteristic(ROC)curve was used to assess predictive *** rates were compared,and Kaplan-Meier survival plots were ***:Compared to the survival group,patients in the death group were older and had more severe liver damage and coagulation dysfunction,necessitating higher norepinephrine doses and increased fl uid *** lactate levels and lower PPI levels at 0 h,6 h,and 12 h were observed in the death *** Cox regression identifi ed prolonged prothrombin time(PT),decreased 6-h PPI and 12-h PPI as independent risk factors for *** area under the curves for 6-h PPI and 12-h PPI were 0.802(95%CI 0.742-0.863,P<0.001)and 0.945(95%CI 0.915-0.974,P<0.001),respectively,which were superior to Glasgow Coma Scale(GCS),Sequential Organ Failure Assessment(SOFA)scores(0.864 and 0.928).Cumulative mortality in the low PPI groups at 6 h and 12 h was signifi cantly higher than in the high PPI groups(6-h PPI:77.52%vs.22.54%;12-h PPI:92.04%vs.13.79%,P<0.001).CONCLUSION:PPI may have value in predicting 28-day mortality in patients with septic shock.

关键词： Peripheral perfusion index Septic shock Prognosis Predictive value

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Nonlinear Impact Damage Evolution of Charpy Type and Analysis of Its Key Influencing Factors

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chinese Journal of Mechanical Engineering 2024年第1期37卷 254-264页

作者： Jianfeng Mao Qian Xu Jiadong yang chi Cao Dasheng Wang Fengping Zhong Mingya Chen Institute of Process Equipment and Control Engineering Zhejiang University of TechnologyHangzhou 310032China Taizhou Key Laboratory of Advanced Manufacturing Technology Taizhou InstituteZhejiang University of TechnologyTaizhou 318014China State Key Laboratory of Nuclear Power Safety Monitoring Technology and Equipment Shenzhen 518172China Zhejiang Academy of Special Equipment Science Hangzhou 310020China Suzhou Nuclear Power Research Institute Suzhou 215004China

The current research of Charpy impact mainly focuses on obtaining the ductile brittle transition temperature of materials by *** with experiments,numerical simulation can study many problems with harsh ***,there are still few studies on the influence of geometric factors such as side *** this paper,the geometry of standard Charpy impact test is *** with different widths and side grooves are *** finite element model of Charpy impact was established by ABAQUS *** test results and simulation results to verify each *** effects of sample width,side groove depth and side groove bottom fillet on the impact fracture resistance of the sample were *** results show that the specimen width is positively correlated with the impact toughness of the *** side groove greatly reduces the impact toughness of the material;the toughness of side groove decreases with the increase of depth;the fracture toughness of side groove decreases with the increase of fillet at the bottom of side *** proportion of toughness energy to impact energy of samples was *** results show that the toughness energy accounts for about 70%of the impact energy of the sample,which has little to do with the geometric characteristics of the *** study presents a reliable method for studying Charpy impact *** influence of geometric parameters is obtained,which provides a reference method for the study of impact toughness of high toughness materials.

关键词： Johnson-Cook model Impact toughness Charpy impact

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Hybridization chain reaction-based DNA nanomaterials for biosensing,bioimaging and therapeutics

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chinese Chemical Letters 2024年第2期35卷 223-231页

作者： Zhaoyue Lv Mengxue Huang Peiran Li Mengdi Xu chi Yao Dayong yang Frontiers Science Center for Synthetic Biology Key Laboratory of Systems Bioengineering (MOE)Institute of Biomolecular and Biomedical EngineeringSchool of Chemical Engineering and TechnologyTianjin UniversityTianjin 300350China Zhejiang Institute of Tianjin University Ningbo 315201China

DNA nanomaterials hold great promise in biomedical fields due to its excellent sequence programmability,molecular recognition ability and *** chain reaction(HCR)is a simple and efficient isothermal enzyme-free amplification strategy of DNA,generating nicked double helices with repeated *** the design of HCR hairpins,multiple nanomaterials with desired functions are assembled by DNA,exhibiting great potential in biomedical ***,the recent progress of HCR-based DNA nanomaterials for biosensing,bioimaging and therapeutics are *** works are exemplified to demonstrate how HCR-based DNA nanomaterials are designed and *** challenges and prospects of the development of HCR-based DNA nanomaterials are *** envision that rationally designing HCR-based DNA nanomaterials will facilitate the development of biomedical applications.

关键词： DNA nanotechnology Hybridization chain reaction DNA nanomaterials Biosensing Bioimaging Therapeutics

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The Study of IgG Subclass Profiles of Anti-HBc in Populations with Different Status of HBV Infection

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Cellular & Molecular Immunology 2005年第5期2卷 393-398页

作者： Yu-Yen yang chien-Fu Huang James Cheng-Chung Wei Mei-Shang Ho Lina Wang Shyh-Jye Lin Wei-Yu Tsai chien-Chou Lin Fangling Xu chi-chiang yang Department of Medical Research Show Chwan Memorial Hospital Changhua China Taiwan Department of Biological Science and Technology I-Shou UniversityKaoshiung China Taiwan Division of Allergy immunology and Rheumatology Chung Shan Medical University Hospital Taichung China Taiwan Institute of Biomedical Sciences Academia Sinica Taipei 11529 ChinaTaiwan School of Medical Laboratory and Biotechnology Chung Shan MedicalUniversity Taichung China Taiwan Division of Laboratory Research and Development Center for DiseaseControl Department of Health Kaoshiung China Taiwan Institute of Virology Medical College Wuhan University Wuhan 430071Hubei China

To study IgG subclasses for the hepatitis B virus （HBV） core antigen （anti-HBc） in different populations, a comparison was made between 104 chronic carriers （60 male and 44 female） and 434 recovered individuals （247 male and 192 female）. Biochemistry analyses of AST （aspartate aminotransferase） and ALT （alanine aminotransferase） were also performed. Among the 104 chronic carriers, 21 patients were found to be ALT and AST abnormal （〉 25 IU/ml）. After comparing these ALT and AST abnormal patients with other ALT and AST normal chronic carriers, no statistical difference was observed in the OD values of the anti-HBe （p 〉 0.05）. The ELISA results showed the anti-HBc IgG subclass pattern was IgG1 〉 IgG3 〉 IgG4 in chronic carriers and IgG3 〉 IgG1 〉 IgG4 in recovered individuals （p 〈 0.05）. This result suggests the IgG1/IgG3 ratio may be related with HBV status. However, in spite of the different anti-HBc IgG1/IgG3 patterns demonstrated in different populations, both anti-HBc IgG1 and IgG3 concentrations were significantly higher in chronic carriers （p 〈 0.05）. Therefore, both the anti-HBc IgG1/IgG3 ratio and their amounts differed. They may play a significant role in chronic carriers and recovered individuals. The anti-HBc IgG subclass profiles of chronic carriers were not changed regardless of liver inflammation, and were independent of sex and age.

关键词： anti-HBs anti-HBe anti-HBc ELISA HBV

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Influencing factors for peripheral and posterior lesions in mild non-proliferative diabetic retinopathy--the Kailuan Eye Study

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International Journal of Ophthalmology(English edition) 2020年第9期13卷 1467-1476页

作者： Mo-chi yang Xiao-Bo Zhu Ya-Xing Wang Shou-Ling Wu Qian Wang Yan-Ni Yan Xuan yang Jing-Yan yang Meng-Xi Chen Ya-Hui Lei Wen-Bin Wei Beijing Tongren Eye Center Beijing Key Laboratory of Intraocular Tumor Diagnosis and TreatmentBeijing Key Laboratory of Ophthalmology and Visual SciencesBeijing Tongren HospitalCapital Medical UniversityBeijing 100730China Department of Ophthalmology General Hospital of Ningxia Medical UniversityYinchuan 750004Ningxia Hui Autonomous RegionChina Dongfang Hospital Beijing University of chinese Medicine Beijing 100078China Beijing Institute of Ophthalmology Beijing Key Laboratory of Ophthalmology and Visual SciencesBeijing Tongren Eye CenterBeijing Tongren HospitalCapital Medical UniversityBeijing 100730China Department of Cardiology Kailuan General HospitalTangshan 063000Hebei ProvinceChina

AIM:To explore the influencing factors of diabetes type 2 patients with mild non-proliferative diabetic retinopathy(NPDR)in the Kailuan area of Tangshan,Hebei Province,***:In this non-interventional,retrospective study,683 patients with type 2 diabetes were included in the Kailuan Diabetic Retinopathy Study involving participants with diabetes in the community-based longitudinal Kailuan *** on the undilated ultrawide field(200°;UWF)images and partial dilated digital fundus images,the diabetic retinopathy(DR)of the surveyed population was *** agreement was estimated by using Cohen’s Kappa *** main outcome indicators included gender,age,weight,height,body mass index,blood pressure,circumferences of neck,waist and hip,current smoking,levels of fasting plasma glucose(FPG),hypersensitive C-reactive protein,creatinine,and cholesterol,*** to different lesions’locations of patients with mild NPDR,logistic regression models were used to estimate the odds ratios(ORs)and their 95%Cls of each risk ***:The study group of 683 patients included 570 males and 113 *** mean age of the patients was62.18±9.41 *** with dilated fundus examinations,there was fair agreement with the level of DR identified on UWF images in 63.91%of eyes(k=0.369,95%CI,0.00-0.00).Detected by UWF images,there were 98 patients with mild NPDR having peripheral retinal lesions,35 patients with mild NPDR having posterior lesions,44 patients with mild NPDR whose lesions were detected both in and out the standard two fields area,and 336 patients with non obvious *** that conferred a statistically significant increased risks for mild NPDR with having peripheral retinal lesions were neck circumstance(OR,1.124;95%CI,1.044-1.211),and with posterior lesions were FPG(OR,1.052;95%CI,1.007-1.099).CONCLUSION:UWF is an effectiveness means of DR ***,it is necessary to evaluate peripheral diabetic retinal lesions which can

关键词： diabetic retinopathy ultra-wide field image neck circumference peripheral lesions fasting plasma glucose posterior pole lesions

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Advancement of metal(loid)research on farmland

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Frontiers of Agricultural Science and Engineering 2024年第3期11卷 442-467页

作者： Qiang ZHENG Chenchen WEI Yanbing chi Peiling yang College of Water Resources and Civil Engineering China Agricultural UniversityBeijing 100083China Agricultural Water Conservancy Department Changjiang River Scientific Research InstituteWuhan 430019China Zhejiang University of Water Resources and Electric Power Hangzhou 310018China

Metal(loid)pollution has emerged as a pressing environmental issue in agriculture,garnering extensive public ***(loid)s are potentially toxic substances that infiltrate the soil through diverse pathways,leading to food chain contamination via plant uptake and subsequent animal *** poses a serious threat to environmental quality,food security,and human ***,the remediation of metal(loid)-contaminated agricultural soil is an urgent concern demanding immediate ***,the majority of research papers concentrate on established,isolated remediation technologies,often overlooking comprehensive field management *** is imperative to provide a comprehensive summary of remediation technologies and identify future development *** review aims to comprehensively summarize a range of soil remediation and enhancement technologies,incorporating insights from multiple disciplines including physics,chemistry,biology,and their interdisciplinary *** review examines the mechanisms of action,suitable scenarios,advantages,disadvantages,and benefits associated with each remediation *** relevant is the examination of metal(loid)sources,as well as the mechanisms behind both established and innovative,efficient remediation and enhancement ***,the future evolution of remediation technologies are considered with the aim of offering a scientific research foundation and inspiration to fellow *** is intended to facilitate the advancement of remediation technologies and establish a robust foundation for sustainable development of soil.

关键词： Metal(loid)pollution metal(loid)remediation metal(loid)sources soil

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Learning by Researching:Achievements and Actions of Teacher Learning in a School-University Collaborative Project

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ECNU Review of Education 2023年第2期6卷 215-236页

作者：魏戈钟启旸 Capital Normal University Jinggangshan University

Purpose:This study explores the achievements and process of a group of chinese primary school teachers learning from a research-based school-university collaborative ***/Approach/Methods:We used qualitative methods to construct our research design,collecting data through participatory observations of weekly meetings,teacher interviews,and participants'reflective *** thematic analysis and discursive analysis were employed as strategies to scrutinize the ***:We categorize teachers'learning into five achievements:outcome,processual,democratic,catalytic,and dialogic achievement.A further examination highlights seven successive learning actions composing an implicit mechanism to facilitate these achievements:questioning,analyzing,modeling,examining,implementing,reflecting,and ***/Value:Through this longitudinal study,we more comprehensively record details about teachers'learning as they conduct their own *** school-university heterogeneous collaboration has potential conflicts,teachers can improve their problem-solving and knowledge creation and sharing abilities,promoting a sense of professional *** findings also suggest the need to reconsider the authentic process of teacher research,a task equally significant for international educators.

关键词： Learning achievements learning actions school-university partnerships teacher learning teacher research

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