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| 1 | Hepatic steatosis is associated with an increased risk of carotid atherosclerosis显示文摘AIM: Although an association between helatic steatosis and vascular risk factors has been described, direct relationships between fatty liver and atherosclerosis have not yet been investigated. The aim of the present study has been to investigate those relationships.METHODS: The Study of Health in Pomerania examined a random population sample aged between 20 and 79 years.A study population of 4 222 subjects without hepatitis B and C infections and without liver cirrhosis was available for the present analysis. Hepatic steatosis was defined sonographically and intima-media thickness (IMT) as well as plaque prevalence were estimated by carotid ultrasound.RESULTS: The prevalence rate of hepatic steatosis was 29.9%. Among subjects aged ≥45 years, an association between hepatic steatosis and IMT of the carotid arteries was found in bivariate analysis, but not after adjustment for atherosclerotic risk factors. Individuals with fatty liver had more often carotid plaques than persons without fatty liver (plaque prevalence rate 76.8% vs 66.6%; P<0.001).This association persisted after adjustment for confounding factors and was predominantly present in subjects with no to mild alcohol consumption.CONCLUSION: There is an independent association between hepatic steatosis and carotid atherosclerotic plaques. Metabolic changes due to nonalcoholic fatty liver disease may explain this relationship. | Henry V(o|¨)lzke Daniel M.Robinson Volker Kleine Roland Deutscher Wolfgang Hoffmann Jan Lüdemann Ulf Schminke Christof Kessler Ulrich John | 2005 | World Journal of Gastroenterology2005，11，12： | 29 |
| 2 | 基于修正的Havriliak-Negami模型的SiO_2纳米改性变压器油宽频介电弛豫特性显示文摘为了掌握纳米改性变压器油介电性能,探索纳米改性内在机理,对Si O2纳米改性变压器油介质损耗特性进行了试验研究。首先在室温条件下分别对纯变压器油和Si O2纳米改性变压器油的宽频介电谱进行测试,然后引入修正的Havriliak-Negami模型方程对实测结果进行拟合,并从该模型中提取了相应的介电参数用于分析纳米油介电性能的变化规律。试验结果表明,与纯变压器油介电谱相比,Si O2纳米油介电谱的低频段电导损耗降低了,而中高频段极化损耗增加了。经分析与讨论,可认为Si O2纳米颗粒添加到变压器油中,纳米颗粒与油分子形成微观双电层结构,其增加了纳米流体中载流子跃迁势垒,致使纳米油宏观介电性能发生一定程度改变。 | 温福新 董明 任明 Christof Sumereder Michael Muhr | 2016 | 电工技术学报2016，31，7： | 10 |
| 3 | Corrosion behavior of electron beam processed AZ91 magnesium alloy显示文摘The increasing use of light alloys owing to their high performance makes magnesium alloys very attractive for the use in automotive and biomedical applications.However,it is well known that magnesium and its alloys have poor corrosion resistance in different atmospheric and aqueous environments.As a means of improving corrosion resistance through the microstructure modification,electron beam processing(EBP)was applied on the as-cast AZ91 magnesium alloy.To evaluate the microstructure influence on the corrosion-resistant,the EB processed samples underwent a solution heat treatment and an artificial aging heat treatment.Four different obtained microstructures were investigated by standard microscopy and electrochemical corrosion tests to evaluate the microstructure and its effects on the corrosion resistance of AZ91 alloy.The EBPed specimens show a significant microstructure refinement and homogenous distribution ofβ-phase at the grain boundaries surrounded by supersaturatedα-Mg which acts as a barrier against corrosion.The electrochemical corrosion test of the samples immersed in 3.5 wt%NaCl after 4 weeks indicates that the EBP improves the corrosion resistance of the alloy due to the nobler corrosion potential of supersaturated a-Mg and more stable protective hydroxide films compared to the heat-treated and as-cast conditions. | Fatemeh Iranshahi Mohammad Bagher Nasiri Fernando Gustavo Warchomicka Christof Sommitsch | 2020 | Journal of Magnesium and Alloys2020，8，4： | 7 |
| 4 | 大气二氧化氮与每日总死亡率、心血管和呼吸系统疾病死亡率的短期关联:398个城市的多中心分析显示文摘目的:采用统一的分析方案,评估全球多个国家/地区的二氧化氮(NO_(2))与总死亡率、心血管和呼吸系统疾病死亡率之间的短期关联。研究设计:采用两阶段的时间序列分析方法、过度离散的广义线性模型和多水平meta分析。研究地点:22个低到高收入国家/地区的398个城市。主要结局指标:1973—2018年逐日总死亡人数(6280万人)、心血管疾病死亡人数(1970万人)和呼吸系统疾病死亡人数(550万人)。结果:平均而言,NO_(2)浓度在滞后1天(前1天)每增加10μg/m^(3),会导致总死亡率、心血管和呼吸系统疾病死亡率分别增加0.46%(95%可信区间0.36%~0.57%)、0.37%(0.22%~0.51%)、0.47%(0.21%~0.72%)。在对共污染物(PM_(10)、PM_(2.5)、臭氧、二氧化硫和一氧化碳)进行调整后,这些关联仍然很稳定。所有3种死因的暴露-反应曲线几乎是线性的,没有明显的阈值。在398个城市中,可归因于高过假定零水平的NO_(2)浓度造成的死亡比例为1.23%(95%可信区间0.96%~1.51%)。结论:这项多中心研究提供了关于NO_(2)短期暴露与总死亡率、心血管和呼吸系统死亡风险之间的独立和线性关联的关键证据,说明通过加强NO_(2)的控制和监管限制标准,可获得人群水平的健康收益。 | 孟夏 刘聪(校) 陈仁杰 郑湃(译) 阚海东(校) Francesco Sera Ana Vicedo-Cabrera Ai Milojevic Maria Guo Yuming Tong Shilu Micheline de Sousa Zanotti Stagliorio Coelh Paulo Hilario Nascimento Saldiva Eric Lavigne Patricia Matus Correa Nicolas Valdes Ortega Samuel Osorio Garcia Jan Kysely Ales Urban Hans Orru Marek Maasikmets Jouni J K Jaakkola Niilo Ryti Veronika Huber Alexandra Schneider Klea Katsouyanni Antonis Analitis Masahiro Hashizume Yasushi Honda Chris Fook Sheng Ng Baltazar Nunes João Paulo Teixeira Iulian Horia Holobaca Simona Fratianni Ho Kim Aurelio Tobias Carmeníniguez Bertil Forsberg ChristoferÅström Martina S Ragettli Yue-Liang Leon Guo Shih-Chun Pan Shanshan Li Michelle L Bell Antonella Zanobetti Joel Schwartz Tangchun Wu Antonio Gasparrini | 2021 | 英国医学杂志中文版2021，24，8： | 7 |
| 5 | Isolation and characterisation of human gingival margin-derived STRO-1/MACS^+ and MACS^-cell populations显示文摘Recently,gingival margin-derived stem/progenitor cells isolated via STRO-1/magnetic activated cell sorting(MACS) showed remarkable periodontal regenerative potential in vivo.As a second-stage investigation,the present study's aim was to perform in vitro characterisation and comparison of the stem/progenitor cell characteristics of sorted STRO-1-positive(MACS^+) and STRO-1-negative(MACS^-) cell populations from the human free gingival margin.Cells were isolated from the free gingiva using a minimally invasive technique and were magnetically sorted using anti-STRO-1 antibodies.Subsequently,the MACS^+ and MACS^- cell fractions were characterized by flow cytometry for expression of CD14,CD34,CD45,CD73,CD90,CD105,CD146/MUC18 and STRO-1.Colony-forming unit(CFU) and multilineage differentiation potential were assayed for both cell fractions.Mineralisation marker expression was examined using real-time polymerase chain reaction(PCR).MACS^+ and MACS- cell fractions showed plastic adherence.MACS^+ cells,in contrast to MACS- cells,showed all of the predefined mesenchymal stem/progenitor cell characteristics and a significantly higher number of CFUs(P<0.01).More than 95%of MACS^+ cells expressed CD105,CD90 and CD73;lacked the haematopoietic markers CD45,CD34 and CD14,and expressed STRO-1 and CD146/MUC18.MACS- cells showed a different surface marker expression profile,with almost no expression of CD14 or STRO-1,and more than 95%of these cells expressed CD73,CD90 and CD146/MUC18,as well as the haematopoietic markers CD34 and CD45 and CD105.MACS^+ cells could be differentiated along osteoblastic,adipocytic and chondroblastic lineages.In contrast,MACS- cells demonstrated slight osteogenic potential.Unstimulated MACS^+ cells showed significantly higher expression of collagen I(P<0.05) and collagen III(P<0.01),whereas MACS^- cells demonstrated higher expression of osteonectin(P<0.05;MannWhitney).The present study is the first to compare gingival MACS^+ and MACS- cell populations demonstrating that MACS^+ cells,in contrast to MACS- cells,harbour stem/progenitor cell characteristics.This study also validates the effectiveness of the STRO-l/MACS^+technique for the isolation of gingival stem/progenitor cells.Human free gingival margin-derived STRO-1/MACS^+ cells are a unique renewable source of multipotent stem/progenitor cells. | Karim M Fawzy El-Sayed Sebastian Paris Christian Graetz Neemat Kassem Mohamed Mekhemar Hendrick Ungefroren Fred Fndrich Christof Drfer | 2015 | International Journal of Oral Science2015，7，2： | 6 |
| 6 | 高吸水聚合物(SAP):新型多功能混凝土外加剂 | Viktor Mechtcherine Lukasz Dudziak Arnd-Eike Brüdern Simone Hempel Christof Schrfl 俞琳 | 2012 | 商品混凝土2012，0，5： | 6 |
| 7 | Transperineal prostate biopsies for diagnosis of prostate cancer are well tolerated: a prospective study using patient-reported outcome measures显示文摘我们试图在有一般麻药 transperineal (TP ) 的男人决定短期的报导病人的结果前列腺活体检视。未来的队研究在有诊断 TP 活体检视的男人被执行。这用立即活体检视以后的一张验证并且适应的问询表并且在后续被做在越过三个第三级的工作分派的 7 和 14 天之间,有回答的医院 51.6% 评价。立即,在活体检视以后,人的 43/201 (21.4%) 感觉到头昏眼花, syncopal,或承受中略。百分之 53 个人在活体检视以后感到了不快(与 95% 得分 < 5 在 0-10 规模) 。12 在过程以后立即从 196 个人(6.1%) 感到了疼痛。尽管有症状的高发生(例如直到 75% 有的一些血尿症, 47% 得了一些疼痛) ,它不是为大多数的一个中等或严重的问题,除了 31 个人承受了的 hemoejaculate。十一个人需要 catheterization (5.5%) 。由于复杂并发症没有住院病人录取(血尿症,败血) 。在重复在一个以后的时间点询问以后,仅仅人的 25/199 (12.6%) 说尽管有重要、显著的减小,重复活体检视将是一个重要问题。从这研究,我们断定那 TP 活体检视很好与类似的副作用侧面和人的态度被容忍重复活体检视到有 TRUS 活体检视的人。这些数据给予与局部麻醉 TP 活体检视为 tolerability 在 TP 活体检视和一个基准以前人建议通知为临床的使用正在被开发。 | Karan Wadhwa Lina Carmona-Echeveria Timur Kuru Gabriele Gaziev Eva Serrao Deepak Parasha Julia Frey Ivailo Dimov Jonas Seidenader Pete Acher Gordon Muir Andrew Doble Vincent Gnanapragasam Boris Hadaschik Christof Kastner | 2017 | Asian Journal of Andrology2017，19，1： | 5 |
| 8 | Chemical composition and physical properties of filter fly ashes from eight grate-fired biomass combustion plants显示文摘For the handling, treatment and utilization of fly ash from biomass combustion its chemical composition and physical properties are important. In this study eight filter fly ashes from different grate-fired biomass combustion plants were investigated. In fly ash from straw combustion high concentrations of(K) were found, whereas in the fly ash from wood combustion the concentrations of Ca and Mg were higher. The average concentration of PO3-4was similar in both types of fly ashes. In all wood fly ashes some measured heavy metal concentrations were above the limits for utilization. The straw fly ashes were much less contaminated and can be utilized. For wood fly ash most parameters showed little variation, except from one fly ash where the dust pre-separator is in poor condition. The average values were: mass median diameter 4.3 ± 0.8 μm, spread of particle size distribution19 ± 11, particle density 2620 ± 80 kg/m3 and angle of repose 50°± 1°. The density of the straw fly ashes is lower(2260 ± 80 kg/m3) and the spread of the size distribution is higher(72 ± 24).For one straw combustion fly ash the values of the mass median diameter and the angle of repose were similar to the values of wood combustion fly ash, for the other straw fly ash the values differed considerably. While the particle size of this fly ash was much smaller,surprisingly the angle of repose was also lower. This can be attributed to the formation of small agglomerates in this fly ash, which were not disintegrated without a certain stress. | Christof Lanzerstorfer | 2015 | Journal of Environmental Sciences2015，27，4： | 4 |
| 9 | Wound Complications in 1145 Consecutive Transumbilical Single-Incision Laparoscopic Procedures显示文摘 | Helmut G. Weiss Walter Brunner Matthias O. Biebl Jan Schirnhofer Katharina Pimpl Christof Mittermair Christian Obrist Eberhard Brunner Tobias Hell | 2014 | Annals of Surgery2014，，1： | 3 |
| 10 | 温度对纳米改性变压器油宽频介电谱特性的影响显示文摘纳米改性变压器油在绝缘性能和传热性能的优势已经得到了国内外学者的广泛认可,但现阶段大多数学者的研究多集中于纳米改性变压器油的宏观特性上,且对于其改性机理尚不明确,通过研究纳米油微观结构与电导、极化之间的相关性,可以为探索纳米油的改性机理以及推广实际应用提供一定的理论参考。该文主要研究了温度对纳米改性变压器油频域介电谱的影响,在10–2~106Hz频率范围内对纳米油介电谱特性进行了分析讨论。随着温度的增加,纳米油的直流电导率呈指数型增加;而在介电谱的中高频段,出现了一个明显的极化峰,随着温度的增加,极化峰峰值逐渐减小且向高频方向移动,Schwarz双电层极化理论可用来解释这一现象。 | 温福新 董明 任明 戴建卓 SUMEREDER Christof MUHR Michael | 2016 | 中国电机工程学报2016，36，8： | 3 |
| 11 | Single port laparoscopy in gastroenterology and hepatology: A fine step forward显示文摘Single incision laparoscopy(SIL) has become an emerging technology aiming at a further reduction of abdominal wall trauma in minimally invasive surgery. Available data is encouraging for the safe application of standardized SIL in a wide range of procedures in gastroenterology and hepatology. Compared to technically simple SIL procedures, the merit of SIL in advanced surgeries, such as liver or colorectal interventions, compared to conventional laparsocopy is self-evident without any doubt. SIL has already passed the learning curve and is routinely utilized in expert centers. This minimized approach has allowed to enter a new era of surgical management that can not be acceded without a fruitful combination of prudent training, consistent day-to-day work and enthusiastic motivation for technical innovations. Both, basic and novel technical specifics as well as particular procedures are described herein. The focus is on the most important surgical interventions in gastroenterology and aims at reviewingthe current literature and shares our experience in a high volume center. | Christof Mittermair Jan Schirnhofer Eberhard Brunner Katharina Pimpl Christian Obrist Michael Weiss Helmut G Weiss | 2014 | World Journal of Gastroenterology2014，20，42： | 3 |
| 12 | Liver stiffness reversibly increases during pregnancy and independently predicts preeclampsia显示文摘AIM To study liver stiffness(LS) during pregnancy and its association with complications during pregnancy.METHODS In this observational, diagnostic study, 537 pregnant women were prospectively enrolled at the Department of Obstetrics and Gynecology, University hospital Heidelberg and Salem Medical Center. LS was measured using the Fibroscan device(Echosens, Paris) in all women and in 41 cases 24 h after delivery. Clinical and morphological data were recorded and abdominal ultrasound and standard laboratory tests were performed. No complications were observed in 475 women(controls) while preeclampsia and intrahepatic cholestasis of pregnancy(ICP) developed in 22 and 40 women, respectively.RESULTS In controls, LS increased significantly from initially 4.5 ± 1.2 kPa in the second trimester to 6.0 ± 2.3 kPa(P < 0.001) in the third trimester. In the third trimester, 41% of women had a LS higher than 6 kPa. Elevated LS in controls was significantly correlated with alkaline phosphatase, leukocytes, gestational age and an increase in body weight and body mass index(BMI). In women with pregnancy complications, LS was significantly higher as compared to controls(P < 0.0001). Moreover, in multivariate analysis, LS was an independent predictor for preeclampsia with an odds ratio of 2.05(1.27-3.31) and a cut-off value of 7.6 kPa. In contrast, ICP could not be predicted by LS. Finally, LS rapidly decreased in all women within 24 h after delivery from 7.2 ± 3.3 kPa down to 4.9 ± 2.2 kPa(P < 0.001).CONCLUSION During pregnancy, LS significantly and reversibly increases in the final trimester of pregnant women without complications. In women with preeclampsia, LS is significantly elevated and an independent noninvasive predictor. | Franziska J Ammon Anna Kohlhaas Omar Elshaarawy Johannes Mueller Thomas Bruckner Christof Sohn Gabriele Fluhr Herbert Fluhr Sebastian Mueller | 2018 | World Journal of Gastroenterology2018，24，38： | 2 |
| 13 | Hierarchical assemblies of molecular frameworks—MOF-on-MOF epitaxial heterostructures显示文摘Functional,porous metal-organic frameworks(MOFs)have attracted much attention as a very flexible class of crystalline,porous materials.For more advanced applications that exploit photophysical properties,the fabrication of hierarchical assemblies,including the creation of MOF/MOF heterointerfaces,is important.For the manufacturing of superstructures with length scales well beyond that of the MOF pore size,layer-by-layer(Ibl)methods are particularly attractive.These allow the isoreticular approach to be extended to superstructures with micrometer length scales,a range that is not accessible using conventional MOF design.The Ibl approach further substantially extends the compositional diversity in MOFs.At the same time,the favorable elastic properties of MOFs allow for heteroepitaxial growth,even in the case of lattice misfits as large as 20%.While the MOF-on-MOF approach to designing multicomponent superstructures with synergistic multifunctionality can also be realized with sophisticated solvothermal synthesis schemes,the Ibl(or liquid-phase epitaxy)approach carries substantial advantages,in particular when it comes to the integration of such MOF superstructures into optical or electronic devices.While the structure vertical to the substrate can be adjusted using the Ibl method,photolithographic methods can be used for lateral structuring.In this review,we will discuss the Ibl liquid-phase epitaxy approach to growing surface-anchored MOF thins films(SURMOFs)as well as other relevant one-pot synthesis methods for constructing such hierarchically designed structures and their emerging applications. | Ritesh Haidar Christof Woll | 2021 | Nano Research2021，14，2： | 2 |
| 14 | Urbanization affects plant flowering phenology and pollinator community:effects of water availability and land cover显示文摘Introduction:Climate change and urbanization have been shown to alter plant phenology.However,a mechanistic understanding of these changes in flowering phenology and associated pollinator communities is lacking.Thus,this study was designed to examine finer scale flowering phenological patterns and driving processes in an arid urban ecosystem.Specifically,we tested the effect of water availability and land cover type on the flowering phenology of brittlebush(Encelia farinosa)and investigated the arthropod pollinator community associated with brittlebush.Methods:The fieldwork was carried out as part of a larger community ecology experiment following a factorial nested design.We chose three land cover types,each of which had three replicates,resulting in a total of nine sites.For water availability manipulations,60 genetically different 5-gallon potted plants were placed on the ground within each site.Pan-trapping was used to collect potential pollinators.Results:Our results showed that water availability did not produce significant differences in flowering phenology.However,brittlebush planted in mesiscaped urban sites bloomed later,longer,and at a higher percentage than those planted in desert remnant sites and desert fringe sites.Furthermore,desert remnant sites were significantly lower in pollinator abundance than desert fringe sites.Pollinator richness varied over time in all land cover types.Conclusions:This study provides empirical evidence that land cover type,which is strongly correlated to temperature,is the primary cause for altered flowering phenology of brittlebush in the Phoenix area,although water availability may also be important.Moreover,land cover affects total abundance of bee pollinators. | Kaesha Neil Jianguo Wu Christofer Bang Stanley Faeth | 2014 | Ecological Processes2014，3，1： | 2 |
| 15 | 巨獭(Pteronura brasiliensis)处境危险吗?秘鲁鱼体和水獭粪便中总汞和甲基汞水平显示文摘本文对秘鲁马努国家公园(Manu National Park)及其邻近的一个金矿区内的鱼的肌肉和巨獭(Pteronura brasiliensis)粪便中的汞和甲基汞水平进行了分析。68%的鱼肌肉中,总汞水平超过了规定的欧洲水獭(Lutra lutra)最大忍受水平(0.1mg/kg鱼鲜重),17.6%超过了最一般的人类消费标准0.5mg/kg鱼鲜重。鱼肌肉中甲基汞与总汞的比值在61.3%~96.9%之间。水獭粪便中没有检出甲基汞而只有微量的无机汞。目前还没有巨獭组织汞浓度的有关数据,但鱼体汞水平大比例超过欧洲水獭的可忍受值,根据过去对欧洲和北美自由生活的水獭的汞中毒的描述,可以设想巨獭体内汞中毒的危险可能存在。 | Arno Christian Gutleb Christof Schenck Elke Staib 张国梁 | 1997 | 人类环境杂志1997，26，8： | 2 |
| 16 | Global hot-spots of heat stress on agricultural crops due to climate change显示文摘 | Edmar I. Teixeira Guenther Fischer Harrij van Velthuizen Christof Walter Frank Ewert | 2011 | Agricultural and Forest Meteorology2011，，： | 2 |
| 17 | 纳米添加量对纳米改性变压器油宽频介电弛豫特性的影响显示文摘为了探索纳米改性变压器油的微观结构与宏观性能的相关性,选择绝缘体二氧化硅为改性材料,在室温条件下,制备出了不同体积分数的二氧化硅纳米改性变压器油并对其稳定性进行了测试。通过对油样进行介电谱曲线复介电常数的测量,对比分析了纯油和纳米改性变压器油的介电谱曲线以及不同体积分数二氧化硅对纳米油介电谱曲线的影响。研究结果表明:和未添加纳米颗粒的变压器油相比,纳米油在介电谱复介电常数虚部曲线的低频段和高频段均出现一个较为明显的极化峰,且低频极化峰峰值要高于高频极化峰,而在整个测试频率范围内,纯油未出现明显的极化峰;体积分数升高,纳米油的介电谱虚部值在低频段和高频段的极化峰均有所增加,且低频极化峰有向高频方向移动的趋势。Schwarz的双电层极化理论被用来解释这一现象。 | 董明 李阳 戴建卓 任明 Christof Sumereder Michael Muhr | 2017 | 高电压技术2017，43，9： | 2 |
| 18 | Distinct Types of Tumor-Initiating Cells Form Human Colon Cancer Tumors and Metastases显示文摘 | Sebastian M. Dieter Claudia R. Ball Christopher M. Hoffmann Ali Nowrouzi Friederike Herbst Oksana Zavidij Ulrich Abel Anne Arens Wilko Weichert Karsten Brand Moritz Koch Jürgen Weitz Manfred Schmidt Christof von Kalle Hanno Glimm | 2011 | Cell Stem Cell2011，，4： | 2 |
| 19 | Uncoupled eNOS annihilates neuregulin-1β-induced cardioprotection: a novel mechanism in pharmacological postconditioning in myocardial infarction显示文摘 | Bernd Ebner Stefan A. Lange Thomas Eckert Clementine Wischniowski Annette Ebner Rüdiger C. Braun-Dullaeus Christof Weinbrenner Carsten Wunderlich Gregor Simonis Ruth H. Strasser | 2013 | Molecular and Cellular Biochemistry2013，，1： | 2 |
| 20 | Influence of heart rate on vessel visibility in noninvasive coronary angiography using new multislice computed tomography显示文摘 | Stephen Schroeder Andreas F Kopp Axel Kuettner Christof Burgstahler Christian Herdeg Martin Heuschmid Andreas Baumbach Claus D Claussen Karl R Karsch Ludger Seipel | 2002 | Clinical Imaging2002，，2： | 2 |
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