|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Anti-inflammatory effects of bifidobacteria by inhibition of LPS-induced NF-κB activation显示文摘AIM: Different strains of bifidobacteria were analysed for their effects on HT-29 intestinal epithelial cells (IECs) in in vitro models both of the non-inflamed and inflamed intestinal epithelium. METHODS: A reporter gene system in HT-29 cells was used to measure levels of NF-KB activation after challenge with bifidobacteria or after bacterial pre-treatment following LPS challenge. IL-8 protein and pro-inflammatory gene expression was investigated using normal HT-29 cells. RESULTS: None of the bifidobacteria tested induced activation of nuclear factor KB (NF-KB) indicating that bifidobacteria themselves do not induce inflammatory events in IECs. However, six out of eight bifidobacteria tested inhibited lipopolysaccharide- (LPS-) induced NFKB activation in a dose- and strain-dependent manner. In contrast, NF-KB activation in response to challenge with tumor necrosis factor-α(TNF-α) was affected by none of the tested bifidobacteria, indicating that the inhibitory effect of bifidobacteria is specific for LPS-induced inflammation in IECs. As shown with two of the six inhibitionpositive bifidobacteria, LPS-induced inhibition of NFKB activation was accompanied by a dose-dependent decrease of interleukin 8 (IL-8) secretion and by lower mRNA levels for IL-8, TNF-a, cyclooxygenase 2 (Cox-2), and intercellular adhesion molecule 1 (ICAM-1). CONCLUSION: Some strains of bifidobacteria are effective in inhibiting LPS-induced inflammation and thus might be appropriate candidates for probiotic intervention in chronic intestinal inflammation. | Christian U Riedel Francis Foata David Philippe Oskar Adolfsson Bernhard J Eikmanns Stephanie Blum | 2006 | World Journal of Gastroenterology2006，12，23： | 14 |
| 2 | ZrC-ZrB_2-SiC ceramic nanocomposites derived from a novel single-source precursor with high ceramic yield显示文摘For the first time, ZrC-ZrB_2-SiC ceramic nanocomposites were successfully prepared by a single-source-precursor route, with allylhydridopolycarbosilane(AHPCS),triethylamine borane(TEAB),and bis(cyclopentadienyl) zirconium dichloride(Cp_2 ZrCl_2) as starting materials. The polymer-to-ceramic transformation and thermal behavior of obtained single-source precursor were characterized by means of Fourier transform infrared spectroscopy(FT-IR) and thermal gravimetric analysis(TGA). The results show that the precursor possesses a high ceramic yield about 85% at 1000 ℃.The phase composition and microstructure of formed ZrC-ZrB_2-SiC ceramics were investigated by means of X-ray diffraction(XRD) and high resolution transmission electron microscopy(HRTEM).Meanwhile, the weight loss and chemical composition of the resultant ZrC-ZrB_2-SiC nanocomposites were investigated after annealing at high temperature up to 1800 ℃. High temperature behavior with respect to decomposition as well as crystallization shows a promising high temperature stability of the formed ZrC-ZrB_2-SiC nanocomposites. | Zhaoju YU Xuan LV Shuyi LAI Le YANG Wenjing LEI Xingang LUAN Ralf RIEDEL | 2019 | Journal of Advanced Ceramics2019，8，1： | 8 |
| 3 | Micro/nano multiscale reinforcing strategies toward extreme high-temperature applications:Take carbon/carbon composites and their coatings as the examples显示文摘Carbon fiber reinforced carbon composites(C/Cs),are the most promising high-temperature materials and could be widely applied in aerospace and nucleation fields,owing to their superior performances.However,C/Cs are very susceptible to destructive oxidation and thus fail at elevated temperatures.Though matrix modification and coating technologies with Si-based and ultra-high temperature ceramics(UHTCs)are valid to enhance the oxidation/ablation resistance of C/Cs,it’s not sufficient to satisfy the increasing practical applications,due to the inherent brittleness of ceramics,mismatch issues between coatings and C/C substrates,and the fact that carbonaceous matrices are easily prone to high-temperature oxidation.To effectively solve the aforementioned problems,micro/nano multiscale reinforcing strategies have been developed for C/Cs and/or the coatings over the past two decades,to fabricate C/Cs with high strength and excellent high-temperature stability.This review is to systematically summarize the most recent major and important advancements in some micro/nano multiscale strategies,including nanoparticles,nanowires,carbon nanotubes/fibers,whiskers,graphene,ceramic fibers and hybrid micro/nano structures,for C/Cs and/or the coatings,to achieve high-temperature oxidation/ablation-resistant C/Cs.Finally,this review is concluded with an outlook of major unsolved problems,challenges to be met and future research advice for C/Cs with excellent comprehensive mechanical-thermal performance.It’s hoped that a better understanding of this review will be of high scientific and industrial interest,since it provides unusual and feasible new ideas to develop potential and practical C/Cs with improved high-temperature mechanical and oxidation/ablation-resistant properties. | Qiangang Fu Pei Zhang Lei Zhuang Lei Zhou Jiaping Zhang Jie Wang Xianghui Hou Ralf Riedel Hejun Li | 2022 | Journal of Materials Science & Technology2022，，1： | 7 |
| 4 | 先进负热膨胀材料(英文)显示文摘钨酸锆因其具有各向同性的负热膨胀性能,自1996年发现以来即获得极大关注。目前一些新发现的具有比钨酸锆更大负热膨胀性的材料,如:碳氮键化合物、铁电陶瓷、反钙钛矿结构的锰氮化合物和纳米粒子也同样备受注目。这些化合物的负热膨胀机理或因其具有振动结构,或因其具有磁性或电学性能的转变。这些具有更大负热膨胀特性的材料在制备不受环境温度变化影响的复合材料方面具有潜在的应用价值。 | 严学华 李炳云 RIEDEL Ralf 程晓农 | 2009 | 硅酸盐学报2009，37，5： | 6 |
| 5 | Challenges and Requirements for the Application of Industry 4.0:A Special Insight with the Usage of Cyber-Physical System显示文摘Considered as a top priority of industrial development,Industry 4.0(or Industrie 4.0 as the German version)has being highlighted as the pursuit of both academy and practice in companies.In this paper,based on the review of state of art and also the state of practice in different countries,shortcomings have been revealed as the lacking of applicable framework for the implementation of Industrie 4.0.Therefore,in order to shed some light on the knowledge of the details,a reference architecture is developed,where four perspectives namely manufacturing process,devices,software and engineering have been highlighted.Moreover,with a view on the importance of Cyber-Physical systems,the structure of Cyber-Physical System are established for the in-depth analysis.Further cases with the usage of Cyber-Physical System are also arranged,which attempts to provide some implications to match the theoretical findings together with the experience of companies.In general,results of this paper could be useful for the extending on the theoretical understanding of Industrie 4.0.Additionally,applied framework and prototypes based on the usage of Cyber-Physical Systems are also potential to help companies to design the layout of sensor nets,to achieve coordination and controlling of smart machines,to realize synchronous production with systematic structure,and to extend the usage of information and communication technologies to the maintenance scheduling. | Egon Mueller Xiao-Li Chen Ralph Riedel | 2017 | Chinese Journal of Mechanical Engineering2017，30，5： | 5 |
| 6 | Single-source-precursor synthesis and phase evolution of SiC-TaC-C ceramic nanocomposites containing core-shell structured TaC@C nanoparticles显示文摘A novel single-source-precursor for SiC-TaC-C nanocomposites was successfully synthesized by the chemical reaction between a polycarbosilane(allylhydridopolycarbosilane,AHPCS)and tantalum(V)chloride(TaCls),which was confirmed by Fourier transform infrared spectra(FTIR)measurement.After pyrolysis of the resultant single-source-precursors at 900'C,amorphous ceramic powders were obtained.The 900 C ceramics were anncaled at different temperatures in the range of 1200-1600℃ to gain SiC-TaC-C nanocomposites.The phase evolution of ceramic nanocomposites was investigated by X-ray diffraction(XRD)and transmission electron microscopy(TEM).The results indicate that the TaC starts to crystallize at lower temperature than theβ-SiC.It is particularly worth pointing out that the unique core-shell structured TaC-C nanoparticles were in-situ formed and homogeneously distributed in the ceramic matrix after annealing at 1400 C.Even at a high temperature of 1600 C,the grain sizes ofβ-SiC and TaC are smaller than 30 nm,flilling the definition of nanocomposites.The present study related to SiC-TaC C nanocomposites paves a new road for enriching ultra-high temperature ceramic family suitable for structural/functional applications in harsh environment. | Zhaoju YU Yujing YANG Kangwei MAO Yao FENG Qingbo WEN Ralf RIEDEL | 2020 | Journal of Advanced Ceramics2020，9，3： | 5 |
| 7 | Hyperdense artery sign on computed tomography in acute ischemic stroke显示文摘Despite the advent and growing availability of magnetic resonance imaging,the imaging modality of choice in the acute care of stroke patients in many institutions remains computed tomography.The hyperdense artery sign is the earliest marker of acute ischemic stroke.In this short review,we discuss the pathology,incidence,clinical aspects,imaging findings,significance and future questions that need to be addressed concerning this important sign. | Ulf Jensen-Kondering Christian Riedel Olav Jansen | 2010 | World Journal of Radiology2010，2，9： | 3 |
| 8 | 日本对华直接投资区域分布决定因素的实证分析显示文摘日本是中国重要的外商直接投资来源国,但其投资具有明显的地域分布不均衡性.本文总结了外商直接投资区位理论的重要研究成果,在此基础上给出了一个简明的计量模型,并利用中国各省区1990~2002年数据对来自日本的直接投资进行了面板数据回归,检验了各决定因素对日本直接投资额的影响,最后根据分析结果给出了简要的政策建议. | 苗泉 James Riedel | 2005 | 现代管理科学2005，，7： | 3 |
| 9 | Development and predictive validity of the cirrhosis-associated ascites symptom scale: A cohort study of 103 patients显示文摘AIM To develop a scale of domains associated with the health-related quality-of-life(HRQOL) in patients with cirrhosis-related ascites.METHODS We initially undertook literature searches and a qualitative study in order to design a cirrhosis-associated ascites symptom(CAS) scale describing symptoms with a potential detrimental impact on health related quality of life(HRQL)(the higher the score, the worse the symptoms). Discriminatory validity was assessed in a validation cohort including cirrhotic patients with(1) tense/severe;(2) moderate/mild; or(3) no ascites(controls). Patients also completed chronic liver disease questionnaire(CLDQ) and the Euro QoL 5-Dimensions 5-Level(EQ-5D-5L) questionnaire evaluating HRQL. The relation between scale scores was analysed using Spearman correlations. RESULTS The final CAS scale included 14 items. The equivalent reliability was high(Chronbach's alpha 0.88). The validation cohort included 103 patients(72% men, mean age 62.4 years). The mean scores for each question in the CAS scale were higher for patients with severe/tense ascites than for mild/moderate ascites and controls. Compared with controls(mean = 9.9 points), the total CAS scale score was higher for severe/tense ascites(mean = 23.8 points) as well as moderate/mild ascites(mean = 18.6 points)(P < 0.001 both groups). We found a strong correlation between the total CAS and CLDQ score(rho = 0.82, P < 0.001) and a moderate correlation between the CAS and the EQ-5D-5L score(0.67, P < 0.001). CONCLUSION The CAS is a valid tool, which reflects HRQOL in patients with ascites. | Agnete Nordheim Riedel Nina Kimer Anne-Sofie Houlberg Jensen Emilie Kristine Dahl Mads Israelsen Luise Aamann Lise Lotte Gluud | 2018 | World Journal of Gastroenterology2018，24，15： | 3 |
| 10 | Ultra-light, high flexible and efficient CNTs/Ti3C2-sodium alginate foam for electromagnetic absorption application显示文摘Ultra-light carboxylic functionalized multi-walled carbon nanotubes(CNTs-COOH) and Ti3C2 MXene hybrids modified sodium alginate(CNTs/Ti3C2-SA) based composite foams were prepared through ice-templated freeze-drying method. The microstructure of the synthesized CNTs/Ti3C2 hybrids and CNTs/Ti3C2-SA foams is characterized by the presence of CNTs inserted between MXene layers which prevents their restacking. The resultant CNTs/Ti3C2 hybrids exhibit a unique sandwich-like hierarchical structure. Scanning electron microscopy(SEM) images show that the CNTs/Ti3C2-SA foam exhibits a heterogeneous anisotropic microstructure and CNTs/Ti3C2 hybrids are homogeneously dispersed in the skeleton of the porous foam. In case that the content of the hybrids amounts 40 mg/cm^3, the CNTs/Ti3C2-SA foam possesses excellent electromagnetic(EM) absorption performance with a minimum reflection coefficient(RCmin) as low as-40.0 dB. In case of a sample thickness of 3.95 mm, the RCminreaches-24.4 dB and the effective absorption bandwidth covers the whole X band from 8.2 to 12.4 GHz. A control test shows that, with the same absorbent content, the CNTs/Ti3C2-SA foam exhibits a far better EM performance than that of CNT-free Ti3C2-SA foam. | Xingmin Liu Nan Chai Zhaoju Yu Hailong Xu Xinliang Li Jiquan Liu Xiaowei Yin Ralf Riedel | 2019 | Journal of Materials Science & Technology2019，35，12： | 3 |
| 11 | Glutamate receptor function in learning and memory 显示文摘 | Riedel G Platt B Micheau J | 2003 | Behav Brain Res2003，140，12： | 2 |
| 12 | Si-C-N三元系统的新陶瓷相显示文摘固体化学合成的氮化物较其他氧化物研究相对较少,然而过去20年来,该研究领域得到重视。超硬 C3N4相所类似的碳氮化物目前已获得深入研究,相比较而言,Si-C-N化合物的研究依旧比较少。在大气条件下首先合成的三元晶体相为Si(NCN)2和 Si2C2(NCN)。本文回顾了近年来采用高温高压反应工艺合成C-N二元和 Si-C-N三元系材料的研究现状。这类新型材料因具有一些独特的性能,如高硬度、磁性、光电性能,而具有重大研究前景。 | RIEDEL Ralf HORVATH-BORDON Elisabeta KLEEBE Hans-Joachim KROLL Peter MIEHE Gerhard van AKEN Peter A LAUTERBACH Stefan | 2007 | 硅酸盐学报2007，35，8： | 2 |
| 13 | Si-based polymer-derived ceramics for energy conversion and storage显示文摘Since the 1960s,a new class of Si-based advanced ceramics called polymer-derived ceramics(PDCs)has been widely reported because of their unique capabilities to produce various ceramic materials(e.g.,ceramic fibers,ceramic matrix composites,foams,films,and coatings)and their versatile applications.Particularly,due to their promising structural and functional properties for energy conversion and storage,the applications of PDCs in these fields have attracted much attention in recent years.This review highlights the recent progress in the PDC field with the focus on energy conversion and storage applications.Firstly,a brief introduction of the Si-based polymer-derived ceramics in terms of synthesis,processing,and microstructure characterization is provided,followed by a summary of PDCs used in energy conversion systems(mainly in gas turbine engines),including fundamentals and material issues,ceramic matrix composites,ceramic fibers,thermal and environmental barrier coatings,as well as high-temperature sensors.Subsequently,applications of PDCs in the field of energy storage are reviewed with a strong focus on anode materials for lithium and sodium ion batteries.The possible applications of the PDCs in Li–S batteries,supercapacitors,and fuel cells are discussed as well.Finally,a summary of the reported applications and perspectives for future research with PDCs are presented. | Qingbo WEN Fangmu QU Zhaoju YU Magdalena GRACZYK-ZAJAC Xiang XIONG Ralf RIEDEL | 2022 | Journal of Advanced Ceramics2022，11，2： | 2 |
| 14 | Limitations of Ampullectomy in the Treatment of Nonfamilial Ampullary Neoplasms显示文摘 | Kevin K. Roggin MD Jen Jen J. Yeh MD Cristina R. Ferrone MD Elyn Riedel MS Hans Gerdes MD David S. Klimstra MD David P. Jaques MD Murray F. Brennan MD | 2005 | Annals of Surgical Oncology2005，，12： | 2 |
| 15 | Intermediate Products and the Theory of International Trade: A Generalization of the Pure Intermediate Good Case 显示文摘 | Riedel James | 1976 | The American Economic Review1976，66，3： | 1 |
| 16 | A novel carbon material derived from pyridin e-borane显示文摘 | Bill J Passing G | 1991 | Adv Mater1991，3，55： | 1 |
| 17 | Al2O3-SiC composites prepared by warm pressing and sintering of an organosilicon polymer-coated alumina powder显示文摘 | GALUSEK D SEDLACEK J RIEDEL R | 2007 | Journal of the European Ceramic Society2007，27，6： | 1 |
| 18 | Inhibition of quorum sensing in Pseudomonas aeruginosa biofilm bacteria by a halogenated furanone compound显示文摘 | Hentzer M Riedel K Rasmussen TB | 2002 | Microbiology2002，148，： | 1 |
| 19 | 显示文摘 | Riedel R Passing G Sehoenfelder H | 1992 | Nature1992，355，6362： | 1 |
| 20 | A clinical trial of adjunctive oestrogen treatment in women with schizophrenia显示文摘 | Kulkami J Riedel A de Castella AR | 2002 | Arch Womens Ment Health2002，5，3： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员