检索结果-南通市图书馆

Lunar noise correlation,imaging and monitoring

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Earthquake Science 2010年第5期23卷 519-530页

作者： christoph Sens-Schnfelder Eric Larose Institute for Geophysics and Geology Universitt Leipzig Laboratoire de Géophysique Interne et Tectonophysique CNRS and Université Joseph Fourier

Passive seismic techniques have revolutionarised seismology, leading for example to increased resolution in surface wave tomography, to the possibility to monitor changes in the propagation medium, and to many new processing strategies in seismic exploration. Here we review applications of the new techniques to a very particular dataset, namely data from the Apollo 17 lunar network. The special conditions of the lunar noise environment are investigated, illustrating the interplay between the properties of the noise and the ability to reconstruct Green＇s functions. With a dispersion analysis of reconstructed Rayleigh waves new information about the shallow shear velocity structure of the Moon are obtained. Passive image interferometry is used to study the effect of temperature changes in the subsurface on the seismic velocities providing direct observation of a dynamic process in the lunar environment. These applications highlight the potential of passive techniques for terrestrial and planetary seismology.

关键词： Moon monitoring passive image interferometry noise planetary seismology

Molecular changes in hepatic metabolism and transport incirrhosis and their functional importance

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2016年第1期22卷 72-88页

作者： christoph G Dietrich Oliver Götze Andreas Geier Bethlehem Center of Health Department of Internal MedicineD-52222 Stolberg(Rhineland)Germany University of Würzburg Division of HepatologyDepartment of Internal Medicine IID-97080 WürzburgGermany

Liver cirrhosis is the common endpoint of many hepatic diseases and represents a relevant risk for liver failure and hepatocellular *** progress of liver fibrosis and cirrhosis is accompanied by deteriorating liver *** review summarizes the regulatory and functional changes in phase Ⅰ and phaseⅡmetabolic enzymes as well as transport proteins and provides an overview regarding lipid and glucose metabolism in cirrhotic ***,phase Ⅰ enzymes are generally down regulated transcriptionally,while phaseⅡenzymes are mostly preserved transcriptionally but are reduced in their *** proteins are regulated in a specific way that resembles the molecular changes observed in obstructive *** and glucose metabolism are characterized by insulin resistance and catabolism,leading to the disturbance of energy expenditure and *** non-invasive tests,especially breath tests,for components of liver metabolism are *** heterogeneity and complexity of changes in hepatic metabolism complicate the assessment of liver function in individual ***,studies in humans are rare,and species differences preclude the transferability of data from rodents to *** clinical practice,some established global scores or criteria form the basis for the functional evaluation of patients with liver cirrhosis,but difficult treatment decisions such as selection for transplantation or resection require further research regarding the application of existing non-invasive tests and the development of more specific tests.

关键词： liver cirrhosis drug metabolism transport breath tests lipid metabolism glucose metabolism

Selected gas response measurements using reduced graphene oxide decorated with nickel nanoparticles

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Materials Science 2021年第4期3卷 412-419页

作者： Ilka Simon Yulyan Haiduk Rolf Mtilhaupt Vladimir Pankov christoph Janiak Institut für Anoganische Chemie und Strukturchemie Heinrich-Heine Universität Düsseldorf 40204DüsseldorfGermany Chemical Faculty Belarusian State UniversityLenningradskaya Str.14220050 MinskBelarus Freiburg Materials Research Center and Institute for Macromolecular Chemistry Albert-Ludwigs-UniversityFreiburg79104FreiburgGermany

The work reports the synthesis of nickel nanoparticles supported on thermally reduced graphene oxides(rGO)in the ionic liquid[BMIm][NTf_(2)]through microwave decomposition ***@rGO with the polymer poly(3,4-ethylenedioxythiophene):poly(styrene sulfonate)(PEDOT:PSS)as binder was positively tested for its response towards the oxidizing gas nitrogen dioxide(10 ppm in air),the reducing gas carbon monoxide(3000 ppm in N_(2))and the volatile organic compound(VOC)acetone(35,000 ppm in air).The results from different gases were compared at different temperatures with the best results for NO_(2) at 200℃.Additionally,it is shown for NO_(2) gas that the Ni@rGO-PEDOT:PSS polymer composite gives better results than the rGO-PEDOT:PSS polymer *** the heat treatment the oxidation state of pure nickel nanoparticles were confirmed by powder diffraction.

关键词： Nickel nanoparticles Reduced graphene oxide Gas sensing Nanocomposite

Elevated plasma levels of N-terminal pro-brain natriuretic peptide in patients with chronic hepatitis C during interferon-based antiviral therapy

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2006年第36期12卷 5875-5877页

作者： Jrg Bojunga christoph Sarrazin Georg Hess Stefan Zeuzem Internal Medicine Ⅱ Saarland University Hospital 66421 Homburg/Saar Germany Roche Diagnostics 68305 Mannheim Germany

AIM: To investigate plasma levels of N-terminal pro-brain natriuretic peptide (NT-proBNP), an established marker of cardiac function, in patients with chronic hepatitis C during interferon-based antiviral therapy. METHODS: Using a sandwich immunoassay, plasma levels of NT-proBNP were determined in 48 patients with chronic hepatitis C at baseline, wk 24 and 48 during antiviral therapy and at wk 72 during ***: Plasma NT-proBNP concentrations were significantly increased (P < 0.05) at wk 24, 48 and 72 compared to the baseline values. NT-proBNP concentrations at baseline and wk 24 were closely correlated (r = 0.8; P < 0.001). At wk 24, 7 (14.6%) patients had NT-proBNP concentrations above 200 ng/L compared to 1 (2%) patient at baseline (P = 0.059). Six of these 7 patients had been treated with high-dose IFN-α induction therapy. In multiple regression analysis, NT-proBNP was not related to other clinical parameters, biochemical parameters of liver disease or virus load and response to ***: Elevated levels of NT-proBNP during and after interferon-based antiviral therapy of chronic hepatitis C may indicate the presence of cardiac dysfunction, which may contribute to the clinical symptoms observed in patients during therapy. Plasma levels of NT-proBNP may be used as a diagnostic tool and for guiding therapy in patients during interferon-based antiviral therapy.

关键词： Hepatitis C N-terminal pro-brain natriuretic peptide Interferon Cardiomyopathy Treatment side effects

Hydrothermal carbonization of agricultural residues:A case study of the farm residues-based biogas plants

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Carbon Resources Conversion 2018年第1期1卷 81-85页

作者： Samar Seyedsadr Rafat Al Afif christoph Pfeifer University of Natural Resources and Life Sciences Institute of Chemical and Energy EngineeringMuthgasse 1071190 ViennaAustria

Hydrothermal carbonization(HTC)of biomass is a promising method to produce carbonaceous *** work presented in this article addresses the application of hydrothermal carbonization(HTC)to produce a solid fuel named HTC-Biochar,whose characteristics are comparable to lignite *** sludge(SD),maize silage(MS),and barley silage(BS)as a substrates were hydrothermally carbonized in a 1.5 L batch reactor at 200C for 6 *** effect of mixing ratios of different substrates on HTC was *** compositions and combustion characteristics of hydro-chars obtained from mono-and co-carbonization were *** showed that HTC increased carbon contents and higher heating values(HHV)by 1.4–14.4%and 13–36%,*** evolution of the H/C and O/C atomic ratios indicated that dehydration and decarboxylation occurred during hydrothermal carbonization for all ***,a significant synergistic enhancement was observed for HHV and carbon content.A mixing ratio of 1:1 for BS and SD showed the best performance for *** summary,hydrothermal co-carbonization is a promising strategy to tailor high-performance hydro-char for energy applications.

关键词： Hydrothermal carbonization Biomass Hydro-char Energy yield

Digital holography and its application for microsystems inspection

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Optoelectronics Letters 2008年第1期4卷 72-77页

作者： Werner Jüptner christoph von Kopylow Claas Falldorf BIAS D-28359 BremenKlagenfurter Str.2Germany

A large number of applications in the before mentioned sense is reported in the literature. In this paper a special remark will be given to the application of 3D deformation measurements using only one illumination direction for the recording of the two holograms in the reference and the loaded state, and only one observation direction for the

关键词：微型系统检查数字全息技术全息光学三维变形测量

Hybrid model for prediction of welding distortions in large structures

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Frontiers of Materials Science 2011年第2期5卷 209-215页

作者： Vesselin MICHAILOV Nikolay DOYNOV christoph STAPELFELD Ralf OSSENBRINK Chair of Joining and Welding Technology Brandenburg Technical University of Cottbus Konrad-Wachsmann-Allee 17 03046 Cottbus Germany

The paper presents a short overview of the contemporary approaches for calculating welding distortions. In order to meet the existing challenges, an advanced hybrid model for prediction of welding distortions in large structures is described. For the purpose of illustrating the capability of this model, a simulation case is put into discussion. The results are validated by comparison with experimental data, as well as with common simulation technique. Analysis of the calculation costs is also presented. The directions for development of calculation technique, based on the presented model, are also suggested.

关键词： hybrid model welding distortion calculation

Novel technique for endoscopic en bloc resection(EMR+)-Evaluation in a porcine model

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Gastroenterology 2019年第28期25卷 3764-3774页

作者： Benjamin Meier Andreas Wannhoff christoph Klinger Karel Caca Department of Gastroenterology Klinikum Ludwigsburg

BACKGROUND Endoscopic en bloc resection of larger polyps is relevant because risk of advanced neoplasia or malignancy correlates with tumor size. Recurrence rates after piecemeal endoscopic mucosal resection (EMR) are high and endoscopic submucosal dissection (ESD) is associated with higher complication rates in the western world. AIM To develop a modified endoscopic en bloc resection technique using an external additional working channel and novel agent for submucosal injection. METHODS EMR+ was considered as modified grasp and snare technique. For simultaneous use of a grasping and cutting device a novel additional working channel was used (AWC■, Ovesco Endoscopy, Tübingen, Germany). AWC■ is installed on the outer surface of the endoscope, covered with a plastic sleeve and designed for single use. For submucosal injection a new agent consisting of poloxamers was used (LiftUp■, Ovesco Endoscopy, Tübingen, Germany). The agent is liquid at room temperature and forms a stable and permanent gel cushion after injection. Safety of LiftUp? has been shown in a pre-clinical study in domestic pigs. LiftUp■ is commercially not yet available but approval is expected in early 2019. EMR+ was first developed ex vivo (explanted pig stomach) and subsequently evaluated in vivo (stomach, porcine model, 3 domestic pigs). Main outcome measurements were: Procedure time, macroscopic en bloc resection and adverse events. RESULTS Concept of EMR+ was first developed ex vivo (explanted pig stomach). Ex vivo, 22 resections were performed after technique was established. Median procedure time (measured from begin of injection to extraction of resection specimen) was 7 min (range 5-11, SD 1.68) and median size of resection specimens was 30 mm × 26 mm × 11 mm ex vivo. Subsequently 13 resections were performed in vivo (stomach, porcine model, 3 domestic pigs). In vivo, median procedure time (measured from begin of injection to extraction of resection specimen) was 5 min (range 3-12, SD 2.72) and

关键词： Endoscopic resesection En bloc Additional working channel Submucosal injection LiftUp

Response of tree-ring width to climate warming and selective logging in larch forests of the Mongolian Altai

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2014年第1期7卷 24-38页

作者： Choimaa Dulamsuren Mookhor Khishigjargal christoph Leuschner Markus Hauck Department of Plant Ecology Albrecht von Haller Institute of Plant SciencesGeorg August University of GöttingenUntere Karspüle 237073 GöttingenGermany

Aims The Mongolian Altai is an old settlement area,which is populated by pastoral nomads since 2000–3000 *** in this region(at ca.2300 m a.s.l.)are highly fragmented and border on steppe and alpine grasslands,which are used for mobile livestock *** climate in Central Asia is warming to levels clearly above the global average,which affects the ***,the transition from planned to market economy and the decollectivization of livestock 20 years ago has strongly changed land use practices in Mongolia,especially resulting in an increase in recent logging *** were interested in the question how climate warming and selective logging influence the annual stem growth and the stand *** The impact of climate and land use by the pastoral nomads on the annual stem increment of more than 1800 trees of Siberian larch(Larix sibirica)was *** groups of trees with divergent growth trends depending on the social position and stand history were identified by non-metric multidimensional scaling and analysis of ***-term trends in the annual stem increment were analyzed by establishing separate regional growth curves for trees of different age *** Findings Instrumental climate data substantiate an increase of temperature by 2.1°C since 1940 at constant *** benefit from the increased ***–response analysis revealed that radial stem increment was promoted by the temperature in early summer,but also high precipitation in spring and in the year before tree-ring *** dynamics is also strongly influenced by anthropogenic *** addition to the natural forest dynamics,logging resulted in divergent growth trends within given age classes and habitats(forest interior and forest edge);overall,22 groups of trees with different characteristics in the annual radial stem increment were identified.A tree-ring series-based reconstruction of logging inten

关键词： climate change forest management forest-steppe ecotones Central Asia Larix sibirica