检索结果-南通市图书馆

American Journal of Analytical Chemistry 2018年第6期9卷 311-321页

作者： Marco Meibohm hans hermann otto Materials Science and Crystallography Technical University of Clausthal Clausthal-Zellerfeld Lower Saxony Germany

Orthorhombic copper polysilicate, CuSiO3, is isotypic to the spin-Peierls compound CuGeO3 and represents a further example of a quasi-one-dimensional spin = 1/2 antiferromagnetic Heisenberg chain system. This is a representation of the first Raman and IR/FIR spectra for CuSiO3, measured at room temperature on polycrystalline samples. A comparison of the optical phonons, predicted by a factor group analysis, with those observed for the CuGeO3 prototype, is presented. A mode assignment for the silicate is given. Surface effects due to a very small crystallite size may cause additional broad bands observed in the Raman spectrum of CuSiO3. From the analysis of the Davydov doublet an intralayer-to-interlayer bond strength of about 40 is derived for the silicate, which is about 20% lower than for the isotypic germanate, allowing for different magnetic responses at low temperature.

关键词： IR/FIR Spectra Raman Spectra Factor Group Analysis Davydov Analysis Copper Polysilicate CuSiO3 Copper Polygermanate CuGeO3 Low-Dimensional Compounds Spin-Peierls Transition

Electrogenic sulfur oxidation mediated by cable bacteria and its ecological effects

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Environmental Science and Ecotechnology 2024年第4期20卷 34-41页

作者： Zhenyu Wang Leonid Digel Yongqiang Yuan Hui Lu Yonggang Yang Carsten Vogt hans-hermann Richnow Lars Peter Nielsen Department of Isotope Biogeochemistry Helmholtz Centre for Environmental Research e UFZPermoserstraße 1504318LeipzigGermany Center for Electromicrobiology Department of BiologyAarhus UniversityDK-8000AarhusDenmark Key Laboratory of Karst Georesources and Environment Ministry of EducationCollege of Resources and Environmental EngineeringGuizhou UniversityGuiyang550025China School of Environmental Science and Engineering Sun Yat-Sen UniversityGuangzhou510006China School of Life Science and Engineering Foshan UniversityFoshan528225China State Key Laboratory of Applied Microbiology Southern China Institute of MicrobiologyGuangdong Academy of SciencesGuangzhou510007China

At the sediment-water interfaces,filamentous cable bacteria transport electrons from sulfide oxidation along their filaments towards oxygen or nitrate as electron *** multicellular bacteria belonging to the family Desulfobulbaceae thus form a biogeobattery that mediates redox processes between multiple *** bacteria were first reported in *** the past years,cable bacteria have been found to be widely distributed across the *** potential in shaping the surface water environments has been extensively studied but is not fully *** this review,the biogeochemical characteristics,conduction mechanisms,and geographical distribution of cable bacteria,as well as their ecological effects,are systematically reviewed and *** insights for understanding and applying the role of cable bacteria in aquatic ecology are summarized.

关键词： Cable bacteria Electrogenic sulfur oxidation Long-distance electron transfer Aquatic ecology

Combined quantitative microscopy on the microstructure and phase evolution in Li1.3Al0.3Ti1.7(PO4)3 ceramics

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 Advanced Ceramics 2020年第2期9卷 149-161页

作者： Deniz Cihan GUNDUZ Roland SCHIERHOLZ Shicheng YU hermann TEMPELa hans KUNGL Rudiger-AEICHEL Forschungszentrum Jülich Institute of Energy and Climate Research(IEK-9:Fundamental Electrochemistry)Julich D-52425Germany Forschungszentrum Julich Institute of Energy and Climate Research(IEK-12:Helmholtz-Institute Münster:Ionics in Energy Storage)Munster D-48149Germany RWTH Aachen University Institute of Physical ChemistryAachen D-52074Germany

Lithium aluminum titanium phosphate(LATP)is one of the materials under consideration as an electrolyte in future all-solid-state lithium-ion *** ceramic processing,the presence of secondary phases and porosity play an important *** a presence of more than one secondary phase and pores,image analysis must tackle the difficulties about distinguishing between these microstructural *** this study,we study the phase evolution of LATP ceramics sintered at temperatures between 950 and 1100℃by image segmentation based on energy-dispersive X-ray spectroscopy(EDS)elemental maps combined with quantitative analysis of LATP *** found aluminum phosphate(AlPO4)and another phosphate phase((Lix)PyOz).The amount of these phases changes with sintering ***,since the grains act as an aluminum source for AlPO4 formation,the aluminum content in the LATP grains ***,the amount of secondary phase changes from more(Lix)PyOz at 950℃to mainly AlPO4 at 1100℃sintering *** also used scanning electron microscopy(SEM)and confocal laser scanning microscopy(CLSM)to study the evolution of the LATP grains and AlPO4,and LATP grain size increases with sintering *** addition,transmission electron microscopy(TEM)was used for the determination of grain boundary width and to identify the amorphous structure of AlPO4.

关键词： lithium aluminum titanium phosphate(LATP) microstructure quantitative microscopy grain size confocal laser scanning microscopy(CLSM) NASICON

Do patients with gastroesophageal reflux disease and somatoform tendencies benefit from antireflux surgery?

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 2019年第3期25卷 388-397页

作者： hans Friedrich Fuchs Benjamin Babic Karl-hermann Fuchs Wolfram Breithaupt Gabor Varga Frauke Musial Department of General Surgery University of Cologne Department of General Surgery University of Mainz Department of Surgery University of California San Diego Department of Surgery Goethe University Frankfurt National Research Center in Complementary and Alternative Medicine NAFKAM Department of Community Medicine UiT The Arctic University of Norway

BACKGROUND The clinical presentation of gastroesophageal reflux disease(GERD) shows a large symptom variation also in different intensities among patients. As several studies have shown, there is a large overlap in the symptomatic spectrum between proven GERD and other disorders such as dyspepsia, functional heartburn and/or somatoform *** To prospectively evaluate the GERD patients with and without somatoform disorders before and after laparoscopic antireflux *** In a tertiary referral center for foregut surgery over a period of 3 years patients with GERD, qualifying for the indication of laparoscopic antireflux surgery, were investigated prospectively regarding their symptomatic spectrum in order to identify GERD and associated somatoform disorders. Assessment of symptoms was performed by an instrument for the evaluation of somatoform disorders[Somatoform Symptom Index(SSI) > 17]. Quality of life was evaluated by Gastrointestinal Quality of Life Index(GIQLI).RESULTS In 123 patients an indication for laparoscopic antireflux surgery was established and in 43 patients further medical therapy was suggested. The portion of somatoform tendencies in the total patient population was 20.48%(34 patients).Patients with a positive SSI had a preoperative GIQLI of 77(32-111). Patients with a normal SSI had a GIQLI of 105(29-140)(P < 0.0001). In patients with GERD the quality of life could be normalized from preoperative reduced values of GIQLI102(47-140) to postoperative values of 117(44-144). In patients with GERD and somatoform disorders, the GIQLI was improved from preoperative GIQLI 75(47-111) to postoperative 95(44-122)(P < 0.0043).CONCLUSION Patients with GERD and associated somatoform disorders have significantly worse levels of quality of life. The latter patients can also benefit from laparoscopic fundoplication, however they will not reach a normal level.

关键词： Gastroesophageal reflux disease Antireflux surgery Laparoscopic fundoplication Somatization Gastroesophageal reflux disease symptoms

Front line defenders of the ecological niche!Screening the structural diversity of peptaibiotics from saprotrophic and fungicolous Trichoderma/Hypocrea species

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fungal Diversity 2014年第6期69卷 117-146页

作者： Christian R.Rohrich Walter M.Jaklitsch hermann Voglmayr Anita Iversen Andreas Vilcinskas Kristian Fog Nielsen Ulf Thrane hans von Dohren hans Bruckner Thomas Degenkolb Bioresources Project Group Fraunhofer Institute for Molecular Biology and Applied Ecology(IME)Winchesterstrasse 235394 GiessenGermany Department of Systematic and Evolutionary Botany Faculty Centre of BiodiversityUniversity of ViennaRennweg 141030 ViennaAustria Department of Systems Biology Technical University of DenmarkSoltofts PladsBuilding 2212800 Kgs.LyngbyDenmark Interdisciplinary Research Centre for BioSystems Land Use and Nutrition(IFZ)Department of Applied EntomologyInstitute of Phytopathology and Applied Zoology(IPAZ)University of GiessenHeinrich-Buff-Ring 26-3235392 GiessenGermany Biochemistry and Molecular Biology OE 2 Institute of ChemistryTechnical University of BerlinFranklinstrasse 2910587 BerlinGermany Interdisciplinary Research Centre for BioSystems Land Use and Nutrition(IFZ)Department of Food SciencesInstitute ofNutritional ScienceUniversity of GiessenHeinrich-Buff-Ring 26-3235392 GiessenGermany AB SCIEXGermany GmbH Landwehrstrasse 5464293 DarmstadtGermany Danish Emergency Management Agency Universitetsparken 22100 CopenhagenDenmark

Approximately 950 individual sequences of nonribosomally biosynthesised peptides are produced by the genus Trichoderma/Hypocreathat belong to a perpetually growing class of mostly linear antibiotic oligopeptides,which are rich in the non-proteinogenic α-aminoisobutyric acid(Aib).Thus,they are comprehensively named ***,peptaibiotics represent ca.80% of the total inventory of secondarymetabolites currently known from Trichoderma/*** unique membrane-modifying bioactivity results from amphipathicity and helicity,thus making them ideal candidates in assisting both colonisation and defence of the natural habitats by their fungal *** this,reports on the in vivo-detection of peptaibiotics have scarcely been published in the *** order to evaluate the significance of peptaibiotic production for a broader range of potential producers,we screened nine specimens belonging to seven hitherto uninvestigated fungicolous or saprotrophic Trichoderma/Hypocrea species by liquid chromatography coupled to electrospray high resolution mass *** of peptaibiotics found were independently confirmed by analysing the peptaibiome of pure agar cultures obtained by single-ascospore isolation from the *** the nine species examined,five were screened positive for peptaibiotics.A total of 78 peptaibiotics were sequenced,56(=72%)of which are ***,dihydroxyphenylalaninol and O-prenylated tyrosinol,two C-terminal residues,which have not been reported for peptaibiotics before,were found as well as new and recurrent sequences carrying the recently described tyrosinol residue at their *** majority of peptaibiotics sequenced are 18-or 19-residue *** homologies with‘classical representatives’of subfamily 1(SF1)-peptaibiotics argue for the formation of transmembrane ion channels,which are prone to facilitate the producer capture and defence of its substratum.

关键词： HPLC/QTOF-ESI-HRMS Metabolite profiling Peptaibiotics Peptaibols Aib peptides Trichoderma Hypocrea

源于共同的机械、电气和自动化设计的薄板坯连铸连轧工艺开发

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

钢铁 2004年第Z1期39卷 408-410页

作者： hans Esau Klassen Michael Reiner Jansen hermann Wolters 西马克德马格公司杜塞尔多夫/门星巴赫德国西马克德马格公司杜塞尔多夫/门星巴赫德国西马克德马格公司杜塞尔多夫/门星巴赫德国

西马克德马格公司在冶金工业方面是一个领先的工业工厂解决方案提供商.统一设计的机械、电气和自动化方案使我们的用户无论是在产品质量、产量、生产的灵活性、工艺的稳定性以及易维护性方面,拥有了生产具有高性能的高级材料的技术.在... 详细信息

西马克德马格公司在冶金工业方面是一个领先的工业工厂解决方案提供商.统一设计的机械、电气和自动化方案使我们的用户无论是在产品质量、产量、生产的灵活性、工艺的稳定性以及易维护性方面,拥有了生产具有高性能的高级材料的技术.在薄板坯连铸连轧领域,这样的共同开发的例子如下:①CSP薄板坯连铸.结晶器液面控制,液压结晶器振动,用于楔形和速度优化的自动导航,带有LCR3(液芯压下)的液压扇形段调整,动态二冷水和结晶器监视系统;②CSP轧机.用于带材板形、连续凸度、平直度控制和自由轧制,采用了特定的磨辊以及相配套的串辊策略的CVC+技术;③用于实现厚度小于1mm带钢高效热轧的"薄规格技术包",包括采用"张力差活套"或"张力计活套"以及快速液压机构配合相应的自动化模块,如自动调平控制,以活套测量为基础的平直度控制,尾部监控或以楔形测量为基础的调平预设定.不仅是机械和电气的共同设计,还有共同的项目执行都将使工厂的运营者受益.例如,对于现代化改造项目和新安装的工厂,通过在交货之前在实验室内的联合测试,项目的投产时间得以优化."工厂回路测试(PILT)"将仿真或甚至机械部件本身与真实的自动化系统(1级,2级和人机界面HMI)结合在一起.通过这样的共同解决方案,西马克德马格公司在电气和自动化领域已发展成"从电机轴一直到生产计划系统"的成套供货商和系统集成商,其目标就是致力于与其用户的长期伙伴关系,并与用户分享其所拥有的工艺经验.

关键词：机械电气自动化设计薄板坯连铸连轧平直度控制结晶器液面控制解决方案工厂用户液压机构生产计划系统技术张力计活套自动化系统张力差活套系统集成商结晶器振动动态二冷水自由轧制自动导航

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

清除锈蚀的祸根

流程工业 2009年第20期 78-79页

作者： hans hermann Letzner 德国Letzner制药用水设备制造有限公司

许多纯水生产设备的操作者都会遇到卫生消毒设备中的红色或棕色的氧化腐蚀，这是设备的氧化腐蚀。氧化腐蚀首先出现在制药用水的生产设备中，随后会出现在输送、分配管道中。本文将向读者介绍，如何能够有效地降低这种氧化腐蚀现象。

关键词：除锈蚀氧化腐蚀消毒设备生产设备制药用水腐蚀现象操作者

QTL alleles on chromosome 7 from fatty Meishan pigs reduce fat deposition

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 China(Life Sciences) 2003年第1期46卷 10-17页

作者：岳根华 Petra Beeckmann Gerhard Moser Elisabeth Müller hans Bartenschlager1 Stanislav Cepica Jaroslav Schrffel Antonin Stratil hermann Geldermann Department of Animal Breeding and Biotechnology University of Hohenheim Institute of Animal Physiology and Genetics Academy of Sciences of the Czech Republic

For detecting QTL in the whole swine genome,1068 pigs from three F2 populations con-structed by crossing European Wild boar and Pietrain (W譖),Meishan and Pietrain (M譖),and Wild Boar and Meishan (W譓) were genotyped for genetic markers evenly spaced at approximately 20 cM inter-vals. A QTL analysis was performed using a least-squares method. Here the results of the QTL analysis on the porcine chromosome 7 are presented. QTL for carcass composition (*** weight,carcass length,backfat depth,abdominal fat and bacon meat) were mapped in the chromosomal region CYPA/CYPD-TNFB-S0102 in M譖 and W譓,but not in W譖. The QTL was additive. Surprisingly, in contrast to the parental phenotype, the QTL alleles from fatty Meishan were associated with thinner backfat than Pietrain and Wild Boar alleles,suggesting that the genome of the fatty Meishan pig contains genes which can reduce fat content of carcass substantially.

关键词： genomics, pig, SSC7, QTL, backfat.

Clinically detected gastroenteropancreatic neuroendocrine tumors are on the rise: Epidemiological changes in Germany

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 2013年第47期19卷 9012-9019页

作者： hans Scherübl Brigitte Streller Roland Stabenow hermann Herbst Michael Hopfner Christoph Schwertner Joachim Steinberg Jan Eick Wanda Ring Krishna Tiwari Soren M Zappe Klinik für Gastroenterologie GI Onkologie und InfektiologieVivantes Klinikum Am Urban10967 BerlinGermany Gemeinsames Krebsregister der Lander Berlin BrandenburgMecklenburg-VorpommernSachsen-Anhalt und der Freistaaten Sachsen und Thüringen (GKR)10967 BerlinGermany Institut für Pathologie Vivantes Netzwerk für Gesundheit GmbH10967 BerlinGermany Institut für Physiologie Charité-Universitatsmedizin10117 BerlinGermany Charité-Universitatsmedizin Berlin HNO-KlinikCampus Virchow Klinikum13353 BerlinGermany

AIM:To study the epidemiologic changes of gastroenteropancreatic neuroendocrine tumors(GEP-NET)in Germany,we analyzed two time periods 1976-1988 ***:We evaluated epidemiological data of GEP-NET from the former East German National Cancer Registry(DDR Krebsregister,1976-1988)and its successor,the Joint Cancer Registry(GKR,1998-2006),which was founded after German *** to a particularly substantial database the epidemiological data from the federal states of Mecklenburg-Western Pomerania,Saxony,Brandenburg and Thuringia,covering a population of more than 10.8 million people,were *** probabilities were calculated using life table *** addition,GEP-NET patients were evaluated for one or more second(non-GEP-NET)primary ***:A total of 2821 GEP neuroendocrine neoplasms were identified in the two *** overall incidence increased significantly between 1976 and2006 from 0.31(per 100.000 inhabitants per year)to2.27 for men and from 0.57 to 2.38 for *** the later period studied(2004-2006),the small intestine was the most common ***(NE)neoplasms of the small intestine showed the largest absolute increase in incidence,while rectal NE neoplasms exhibited the greatest relative *** the incidence of appendiceal NET in women showed little change between 1976 and *** survival of patients varied for sex,tumor site and the two periods studied but improved significantly over ***,about 20%of the GEP-NET patients developed one or more second *** most common location was the gastrointestinal ***-NET patients without second malignancies fared better than those with one or more of ***:The number of detected GEP-NET increased about 5-fold in Germany between 1976 *** the same time,their anatomic distribution changed,and the survival of GEP-NET patients improved *** malignancies are common and influence the ov

关键词： Neuroendocrine Tumor Epidemiology Gastrinoma Insulinoma Endoscopy German history Reunification Second malignancy

Salinity Stress in Roots of Contrasting BarleyGenotypes Reveals Time-Distinct and Genotype-Specific Patterns for Defined Proteins

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Molecular Plant 2014年第2期7卷 336-355页

作者： Katja Witzel Andrea Matros Marc Strickert Stephanie Kaspar Manuela Peukert Karl H. Mühling Andreas Börner hans-Peter Mock Leibniz Institute of Plant Genetics and Crop Plant Research Corrensstrasse 3 06466 Gatersleben Germany Present address: Leibniz Institute of Vegetable and Ornamental Crops Theodor-Echtermeyer-Weg 1 14979 Großbeeren Germany Present address: University of Siegen Media Systems Group Hölderlinstrasse 3 57068 Siegen Germany Present address: Bruker Daltonik GmbH Fahrenheitstrasse 4 28359 Bremen Germany Institute of Plant Nutrition and Soil Science Christian Albrechts University Hermann-Rodewald-Strasse 2 24118 Kiel Germany

Soil salinity is one of the most severe abiotic stress factors threatening agriculture worldwide. Hence,particular interest exists in unraveling mechanisms leading to salt tolerance and improved crop plant performance onsaline soils. Barley is considered to be one of the most salinity-tolerant crops, but varying levels of tolerance are wellcharacterized. A proteomic analysis of the roots of two contrasting cultivars （cv. Steptoe and cv. Morex） is *** plants were exposed to a period of 1, 4, 7, or 10 d at 0, 100, or 150mM NaCI. The root proteome was analyzedbased on two-dimensional gel electrophoresis. A number of cultivar-specific and salinity stress-responsive proteins wereidentified. Mass spectrometry-based identification was successful for 74 proteins, and a hierarchical clustering analysisgrouped these into five clusters based on similarity of expression profile. The rank product method was applied to sta-tistically access the early and late responses, and this delivered a number of new candidate proteins underlying salinitytolerance in barley. Among these were some germin-like proteins, some pathogenesis-related proteins, and numerousas-yet uncharacterized proteins. Notably, proteins involved in detoxification pathways and terpenoid biosynthesis weredetected as early responsive to salinity and may function as a means of modulating growth-regulating mechanisms andmembrane stability via fine tuning of phytohormone and secondary metabolism in the root.

关键词： barley genotypes mass spectrometry proteome analysis salinity stress two-dimensional gel electrophoresis