检索结果-南通市图书馆

Association of Human Whole-blood NAD+Levels with Nabothian Cyst

在线全文

学校读者我要写书评

暂无评论

Biomedical and environmental Sciences 2024年第5期37卷 471-478页

作者： XU Ling WANG yue Xuan WANG Wei FAN Xue CHEN Xue yu ZHOU Tian yun LIU yu He yu Ye YANG Fan JU Zhen yu ZHOU Yong WANG Deng Liang Clinical Research Institute Shanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China NHC Key Lab of Reproduction Regulation Shanghai Engineering Research Center of Reproductive Health Drugs and DevicesShanghai Institute for Biomedical and Pharmaceutical TechnologiesShanghai 200237China department of Applied Statistics Johannes Kepler University LinzLinz 4040Austria Hematology Center Beijing Key Laboratory of Pediatric Hematology OncologyNational Key Discipline of Pediatrics(Capital Medical University)Key Laboratory of Major Diseases in ChildrenMinistry of EducationBeijing Children's HospitalCapital Medical UniversityNational Center for Children's HealthBeijing 100045China department of Biostatistics School of Public HealthCheeloo College of MedicineShandong UniversityJinan 250012ShandongChina Clinical Medicine School of Basic MedicineShanghai Medical College Fudan UniversityShanghai 200032China department of Biochemistry and Molecular Biology Hengyang Medical SchoolUniversity of South ChinaHengyang 421001HunanChina Administrative Office Total Quality Management OfficeTotal Quality Management InstituteShanghai General HospitalShanghai Jiao Tong University School of MedicineShanghai 200080China The First Affiliated Hospital of Jinan university Institute of Aging and Regenerative MedicineJinan UniversityJinan 510632GuangzhouChina department of Scientific Research The First Affiliated Hospital of Huzhou UniversityHuzhou 313000ZhejiangChina department of Neurosurgery Neurosurgery Research InstituteThe First Affiliated HospitalFujian Medical UniversityFuzhou 350005FujianChina department of Neurosurgery Binhai Branch of National Regional Medical CenterThe First Affiliated HospitalFujian Medical UniversityFuzhou 350209FujianChina Fujian Provincial Institutes of Brain Disorders and Brain Sciences The First Affiliated HospitalFujian Medical UniversityFuzhou 350005FujianChina Fujian Provincial Clinical Research Center for Neurological

Objective Little is known about the association between whole-blood nicotinamide adenine dinucleotide(NAD^(+))levels and nabothian *** study aimed to assess the association between NAD^(+)levels and nabothian cysts in healthy Chinese *** Multivariate logistic regression analysis was performed to analyze the association between NAD^(+)levels and nabothian *** The mean age was 43.0±11.5 years,and the mean level of NAD^(+)was 31.3±5.3μmol/*** cysts occurred in 184(27.7%)participants,with single and multiple cysts in 100(15.0%)and84(12.6%)participants,*** total nabothian cyst prevalence gradually decreased from37.4%to 21.6%from Q1 to Q4 of NAD^(+)and the prevalence of single and multiple nabothian cysts also decreased across the NAD^(+)*** compared with the highest NAD^(+)quartile(≥34.4μmol/L),the adjusted odds ratios with 95%confidence interval of the NAD^(+)Q1 was 1.89(1.14–3.14)for total nabothian *** risk of total and single nabothian cysts linearly decreased with increasing NAD^(+)levels,while the risk of multiple nabothian cysts decreased more rapidly at NAD^(+)levels of 28.0 to35.0μmol/***:Low NAD^(+)levels were associated with an increased risk of total and multiple nabothian cysts.

关键词： Nicotinamide adenine dinucleotide Nabothian cyst Female Risk factor

Evolution of copper species during heat treatment and its effect on CO oxidation reaction on CuCeZrO_(y) catalyst synthesized by a facile solvent-free route

在线全文

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第4期42卷 660-667页

作者： Guangying Fu Dongsen Mao Jun yu Qiangsheng Guo School of Chemical and environmental engineering Shanghai Institute of TechnologyShanghai21418 China The ZeoMat Group Qingdao Institute of Bioenergy and Bioprocess TechnologyCASQingdao26611China

Several ternary oxides CuCeZrO_(y)(CCZ)were synthesized by a facile grinding method followed by calcination at high temperatures,and used as catalysts for CO oxidation at low *** influences of calcination temperature(400-600℃)on the physicochemical properties of the assynthesized ternary oxides were investigated by thermogravimetric analysis/differential scanning calorimetry(TGA/DSC),X-ray diffraction(XRD),transmission electron microscopy(TEM),Raman,inductively coupled plasma-optical emission spectrometry(ICP-OES),N_(2) adsorption,H_(2)-temperature programmed reduction(H_(2)-TPR),and X-ray photoelectron spectroscopy(XPS)*** results show that the increase in calcination temperature from 400 to 500℃is conducive to the high dispersion of CuOx on catalyst surface and the incorporation of Cu species into the support to form the Cu-Ce-Zr-O solid *** raising of calcination temperature from 500 to 600℃,however,leads to the segregation of Cu species from the solid solution to aggregate on support surface and growth of highly dispersed CuOx *** highest catalytic activity is acquired over the CCZ calcined at 500℃,which can be ascribed to the largest contents of Cu+species and oxygen vacancies owing to the formation of the maximum amount of Cu-Ce-Zr-O solid solution.

关键词： CuCeZrO_(y)catalyst co oxidation Calcination temperature Grinding method Oxalate precursor Rare earths

Efficient Monolithic Perovskite/Silicon Tandem Photovoltaics

在线全文

学校读者我要写书评

暂无评论

Energy & environmental Materials 2024年第3期7卷 268-281页

作者： Yong Wang yu Wang Feng Gao Deren Yang State Key Laboratory of Silicon Materials and School of Materials Science and engineering Zhejiang UniversityHangzhou 310027China ZJU-Hangzhou Global Scientific and Technological Innovation Center Zhejiang UniversityHangzhou 310014China department of Physics Chemistry and Biology(IFM)Linköping UniversityLinköping 58183Sweden

Tunable bandgaps make halide perovskites promising candidates for developing tandem solar cells(TSCs),a strategy to break the radiative limit of 33.7%for single-junction solar *** perovskites with market-dominant crystalline silicon(c-Si)is particularly attractive;simple estimates based on the bandgap matching indicate that the efficiency limit in such tandem device is as high as 46%.However,state-of-the-art perovskite/c-Si TSCs only achieve an efficiency of~32.5%,implying significant challenges and also rich *** this review,we start with the operating mechanism and efficiency limit of TSCs,followed by systematical discussions on wide-bandgap perovskite front cells,interface selective contacts,and electrical interconnection layer,as well as photon management for highly efficient perovskite/c-Si *** highlight the challenges in this field and provide our understanding of future research directions toward highly efficient and stable large-scale wide-bandgap perovskite front cells for the commercialization of perovskite/c-Si TSCs.

关键词： 2-terminal electrical interconnection perovskite/silicon tandem photovoltaics photon management wide-bandgap perovskites

Recent advances on bismuth oxyhalides for photocatalytic CO_(2)reduction

在线全文

学校读者我要写书评

暂无评论

Journal of environmental Sciences 2024年第6期140卷 183-203页

作者： Liangpang Xu Jimmy C.yu Ying Wang department of Chemistry The Chinese University of Hong KongShatinNew TerritoriesHong Kong 999077China

Photocatalytic conversion of CO_(2)into fuels such as CO,CH_(4),and CH_(3)OH,is a promising approach for achieving carbon *** oxyhalides(BiOX,where X=Cl,Br,and I)are appropriate photocatalysts for this purpose due to the merits of visible-light-active,efficient charge separation,and easy-to-modify crystal structure and surface *** practical applications,multiple strategies have been proposed to develop high-efficiency BiOX-based *** review summarizes the development of different approaches to prepare BiOX-based photocatalysts for efficient CO_(2)*** the review,the fundamentals of photocatalytic CO_(2)reduction are ***,several widely used modification methods for BiOX photocatalysts are systematacially discussed,including heterojunction construction,introducing oxygen vacancies(OVs),Bi-enrichment,heteroatom-doping,and morphology ***,the challenges and prospects in the design of future BiOX-based photocatalysis for efficient CO_(2)reduction are examined.

关键词： Bismuth oxyhalides Photocatalysis CO_(2)reduction Modification methods

Interface failure of segmental tunnel lining strengthened with steel plates based on fracture mechanics

在线全文

学校读者我要写书评

暂无评论

Frontiers of Structural and civil engineering 2024年第1期18卷 137-149页

作者： Yazhen SUN Yang yu Jinchang WANG Longyan WANG School of Transportation and Geomatics engineering Shenyang Jianzhu UniversityShenyang 110168China School of civil engineering Shenyang Jianzhu UniversityShenyang 110168China Institute of Transportation engineering Zhejiang UniversityHangzhou 310058China Center for Balance Architecture Zhejiang UniversityHangzhou310058China

Segmental tunnel lining strengthened with steel plates is widely used worldwide to provide a permanent strengthening *** existing studies assume an ideal steel-concrete interface,ignoring discontinuous deformation characteristics,making it difficult to accurately analyze the strengthened structure’s failure *** this study,interfacial fracture mechanics of composite material was applied to the segmental tunnel lining strengthened with steel plates,and a numerical three-dimensional solid nonlinear model of the lining structure was established,combining the extended finite element method with a cohesive-zone model to account for the discontinuous deformation characteristics of the *** results accurately describe the crack propagation process,and are verified by full-scale ***,dynamic simulations based on the calibrated model were conducted to analyze the sliding failure and cracking of the steel-concrete ***,detailed location of the interface bonding failure are further verified by model *** results show that,the cracking failure and bond failure of the interface are the decisive factors determining the instability and failure of the strengthened *** proposed numerical analysis is a major step forward in revealing the interface failure mechanism of strengthened composite material structures.

关键词： segmental tunnel lining steel plate strengthening connecting interface cohesive-zone model extended finite element method

Cooling effect of ripped-stone embankments on Qing-Tibet railway under climatic warming

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science Bulletin 2003年第6期48卷 598-604页

作者： LAI yuanming1, ZHANG Luxin1 , ZHANG Shujuan1 & MI Long2 1. State Key Lab. of Frozen Soil engineering, Cold and Arid Regions environmental and engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China 2. department of civil engineering, Northern Jiaotong university, Beijing 100044, China State Key Lab. of Frozen Soil engineering Cold and Arid Regions Environmental and Engineering Research Institute Chinese Academy of Sciences Lanzhou China department of civil engineering Northern Jiaotong University Beijing China

The heat convection in ballast mass and ripped-stone mass in railway embankments is the problem of heat convection in porous media. In order to calculate the temperature distribution of Qing-Tibet railway embankment, from the governing equations used to study forced convec-tion for incompressible fluids porous media, the finite ele-ment formulae for heat convection in porous media are de-rived by using Galerkin抯 method. The temperature fields of the traditional ballast embankment and the ripped-stone mass embankment, constructed on July 15, have been ana-lyzed and compared under the case that the air temperature in Qinghai-Tibetan Plateau will be warmed up by 2.0℃ in the future 50 years. The calculated results indicate that, the permafrost 5 m below the traditional ballast embankment will be thawed in the regions in which the air yearly-average temperature is larger than -3.5℃ or the yearly-average temperature at the native surface is larger than -1℃. The embankment will cause large thawing settlement. The rail-way embankment will be damaged by permafrost degrada-tion. The ripped-stone mass embankment can not only resist the effect of climatic warm up on it but also provide cool energy for the permafrost under it. It can assure permafrost stability and not subjected to thawing. Therefore, it is highly recommended that the ripped-stone mass embankment be taken as the Qing-Tibet railway embankment structure in high-temperature permafrost regions so that permafrost embankment can be protected as possible as we could.

关键词： cooling effect ripped-stone embankment climatic warming.

Does China's digital economy contribute to low-carbon transition?

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Ecological Economy 2024年第2期20卷 102-122页

作者： LI Jun-jun HUANG xin-yu CHEN Mu ZHANG Meng-jiang ZHANG Zhen School of Economics Fujian Normal UniversityFuzhou 350007CHINA College of Mechanical and Electrical engineering Wuyi UniversityNanping 354300CHINA

The digital economy,as a new emerging economic form,has become an important power for realizing Chinese-style modernization and promoting green development in *** paper measures the digital economy and low-carbon transition index based on the data of 30 provinces in China from 2013 to 2020 and analyzes the mechanism and path of the digital economy affecting low-carbon transition using the fixed effect panel data model and the threshold effect *** is found that,(1)The digital economy and low-carbon transition in China are various in different regions,with characteristics of being unbalanced and insufficient.(2)The digital economy significantly promotes low-carbon transition,with the greatest influence in the Central region,followed by the Eastern region and the Western *** different dimensions,the development of informatization and digital transactions promote low-carbon transition,but the development of the internet plays an inhibiting role.(3)The higher the degree of urbanization and environmental regulation,the greater the influence of the digital economy on low-carbon transition.

关键词： digital economy low-carbon transition threshold effect model instrumental variables quantile regression

土壤重金属含量变化的影响因素多目标识别方法

在线全文

学校读者我要写书评

暂无评论

环境科学 2024年第8期45卷 4791-4801页

作者：管祥楠董士伟刘玉张欣欣潘瑜春卢闯长安大学土地工程学院西安710054 北京市农林科学院信息技术研究中心北京100097

识别土壤重金属含量变化影响因素是减少或防治土壤重金属污染的基础.以北京市昌平区农业试验田为例,首先分析2012和2022年重金属As、Cr、Cu、Ni、Pb和Zn的含量变化;其次基于地理探测器分别从单目标和多目标水平探测重金属含量变化的影... 详细信息

识别土壤重金属含量变化影响因素是减少或防治土壤重金属污染的基础.以北京市昌平区农业试验田为例,首先分析2012和2022年重金属As、Cr、Cu、Ni、Pb和Zn的含量变化;其次基于地理探测器分别从单目标和多目标水平探测重金属含量变化的影响因素;最后设置与相关性分析方法和已有研究的对比试验,评估影响因素识别方法的有效性.结果表明人类活动因素加剧了研究区域内土壤重金属含量的变化:①在单目标水平探测上,土地利用类型是Cr、Cu和Zn含量变化的主要影响因素,而年沉降通量影响As的含量变化;交互探测结果显示各个因子间均具有增强效应,人类活动因素的交互作用占主导;②多目标水平探测结果涵盖单目标水平探测结果且能够识别出更多的影响因素,土地利用类型影响Cu、Zn、Cr、Ni和As的含量变化,As和Zn含量变化受到年沉降通量影响;③耦合地理探测器和主成分分析的多目标识别方法可以更加有效地识别出土壤重金属含量变化的影响因素,比单个土壤重金属相关性分析方法更为有效.研发的重金属含量变化影响因素多目标识别方法可为区域土壤重金属污染监测与宏观管理提供技术支撑.

关键词：重金属空间分析影响因素地理探测器主成分分析(PCA) 地块尺度

Study on the hardening mechanism of cement asphalt binder

在线全文

学校读者我要写书评

暂无评论

Science China(Technological Sciences) 2010年第5期53卷 1406-1412页

作者： YANG JinBo,YAN Peiyu,KONG XiangMing & LI Xiang Key Laboratory of Structural engineering and Vibration of Education Ministry of China,department of civil engineering,Tsinghua university,Beijing 100084,China 1. Key Laboratory of Structural engineering and Vibration of Education Ministry of China Department of Civil Engineering Tsinghua University Beijing 100084 China

The hydration and hardening mechanism of cement asphalt binder(CAB) was *** early hydration process,hydration products and paste microstructure of CAB made by Portland cement and anionic asphalt emulsion were investigated by calorimetry,X-ray diffraction,and environmental scanning electron *** early hydration process of CAB can be characterized as 5 stages similar to those of Portland *** is no chemical reaction detected between cement and asphalt,hence no new hydration products other than those of Portland cement are *** hardening of CAB begins with the hydration of *** the hydration of cement comes into the acceleration period and its exothermic rate comes to the maximum,the coalescence of asphalt particles in asphalt emulsion is *** the hardened system of CAB,it was found that the hydration products of cement form the skeleton and are covered by the continuous asphalt *** formed an interpenetrating network *** emulsifiers in the asphalt emulsion may retard the hydration process of cement.

关键词： cement asphalt binder asphalt emulsion Portland cement hydration coalescence