维普中文期刊产品整合服务
597篇 您的检索式:作者名="nther"
    题名 作者 年代 出处 被引量
1193nmLA-ICPMS对国际地质标准参考物质中42种主量和微量元素的分析显示文摘本文采用配备有 193nm Ar F准分子 (excimer)激光器的 Geo L as2 0 0 M剥蚀系统和 Elan6 10 0 DRC ICP- MS对 4个美国地质调查所 (USGS)玻璃标准参考物质以及 3个美国国家标准技术研究院 (NIST)人工合成硅酸盐玻璃标准参考物质中几乎覆盖整个质量数范围 (从 7L i到 2 38U)的 38个微量和 4个主量 (Na、Mg、Ti和 Mn)元素进行了分析。分析结果表明 ,无论是对 USGS还是 NIST玻璃 ,元素分析的相对标准偏差 RSDs和分析值与参考值之间的相对偏差 (RDs)一般优于 10 % ,RSD和RD较大的元素主要出现在含量很低或不均匀样品中。稀土元素的 RSD显示 ,除 AGV- 2 G可能存在不均匀现象外 ,其它所测样品在 6 0 μm尺度上 ,元素分布是均匀的。本研究证明 ,由于 ICP- MS具有 10 8cps(每秒计数 )的动态线性范围 ,本实验室的L A- ICPMS系统可定量分析含量在百分之几的主量元素及微量元素。分析精密度和准确度可与常规溶液雾化进样 ICP-柳小明 高山 袁洪林 Bodo HATTENDORF DetlefG■NTHER 陈亮 胡圣红 2002岩石学报2002,18,3:153
2LIVESTOCK PRODUCTION PLANNING UNDER ENVIRONMENTAL RISKS AND UNCERTAINTIES显示文摘In this paper we demonstrate the need for risk-adjusted approaches to planning expansion of livestock production. In particular, we illustrate that under exposure to risk, a portfolio of producers is needed where more efficient producers co-exist and cooperate with less efficient ones given that the latter are associated with lower, uncorrelated or even negatively correlated contingencies. This raises important issues of cooperation and risk sharing among diverse producers. For large-scale practical allocation problems when information on the contingencies may be disperse, not analytically tractable, or be available on aggregate levels, we propose a downscaling procedure based on behavioral principles utilizing spatial risk preference structure. It allows for estimation of production allocation at required resolutions accounting for location specific risks and suitability constraints. The approach provides a tool for harmonization of data from various spatial levels. We applied the method in a case study of livestock production allocation in China to 2030.Günther FISCHER Tatiana ERMOLIEVA Yuri ERMOLIEV Harrij van VELTHUIZEN 2006Journal of Systems Science and Systems Engineering2006,15,4:31
3内蒙古大井锡多金属矿床流体成矿作用研究:单个流体包裹体组分LA-ICP-MS分析证据显示文摘应用LA-ICP-MS分析方法进行大井矿床中心部位的锡铜矿体及黄岗梁矿床锡矿体萤石及石英中单个包裹体流体组分分析,以包裹体流体中微量元素Rb/Sr,Sn/Cu等比值追踪大井矿床富铜及富锡流体的来源与演化.研究结果表明大井矿床富铜流体Cu>Sn,Sr>Rb几至几十倍,相对富集Na,主要产出于萤石中,流体可能来源于深源较基性岩浆.富锡流体Sn>Cu,Rb>Sr几至几十倍,相对富集K,产出于石英及萤石中,流体可能来源于浅源的花岗岩浆.富锡与富铜两种流体在中低温-低盐度阶段强烈叠加富集成矿,形成大井矿床中心部位锡铜富矿体,解决了前人研究中难于解决的富锡、富铜流体成矿机理问题.王莉娟 王玉往 王京彬 朱和平 D.Günther 2006科学通报2006,51,10:12
4全球大停电的经验教训显示文摘根据国际能源机构的预测,在未来20多年里,发展中国家和新兴国家的耗电量将增加220%,而工业化国家则仅增加37%。现有电力系统负荷的大幅度增加将产生瓶颈效应和可靠性问题。历年发生的欧美州大停电清楚地表明,相邻系统间的紧密电气耦合对于重负荷互联系统而言,可能存在无法控制的级联事故风险。介绍美加大停电和欧洲大停电事件,讨论大停电的经验教训。对避免环流、防止电压崩溃等解决大型电力系统稳定性问题的措施及“防火墙”的实施进行了说明。阐述涉及系统改善的高压直流输电(HVDC)和灵活交流输电(FACTS)技术的优点。Gǖnther Beck Dusan Povh Dietmar Retzmann Erwin Tehsch 2007中国电力2007,40,10:11
5大别-苏鲁榴辉岩和石榴辉石岩中矿物Ce异常:对氧化环境下形成沉积物深俯冲作用的示踪显示文摘准分子激光ICP-MS矿物原位微区分析发现,来自大别-苏鲁超高压变质带典型地区(双河、毛屋、碧溪岭及仰口)的榴辉岩和石榴辉石岩中石榴石Ce异常从正到负高度变化.绿辉石或单斜辉石也表现出类似的Ce异常特征,但变化幅度小于石榴石.这种Ce异常高度变化的现象仅见于氧化条件下形成的强烈风化剖面中.因此,这一结果表明大别-苏鲁榴辉岩和石榴辉石岩中存在氧化条件下形成的风化沉积物,这些陆壳物质的深俯冲对地幔的改造和物质再循环可能具有重要意义.罗彦 高山 袁洪林 柳小明 D.Gnther 金振民 孙敏 2004中国科学(D辑)2004,34,1:10
6Can fecal microbiota transplantation cure irritable bowel syndrome?显示文摘AIM To verify the utility of treatment with fecal microbiota transplantation(FMT) in patients with irritable bowel syndrome(IBS).METHODS We searched EMBASE, Cochrane Library and Pub Med in March, 2017. The reviewed literature was based on two systematic searches in each of the databases. The Me SH terms used were IBS and fecal microbiota transplantation and the abbreviations IBS and FMT. Reference lists from the articles were reviewed to identify additional pertinent articles. RESULTS A total of six conference abstracts, one case report, one letter to the editor, and one clinical review were included. In the final analysis, treatment of 48 patients was evaluated. Treatment revealed an improvement in 58% of cases. The varying structure of the nine included studies must be taken into consideration.CONCLUSION Data on FMT and IBS are too limited to draw sufficientconclusions. Standardized double blinded randomized clinical trials need to be carried out to evaluate the effect of FMT on IBS.Sofie Ingdam Halkjar Anders Watt Boolsen Stig Günther Alice Hojer Christensen Andreas Munk Petersen 2017World Journal of Gastroenterology2017,23,22:8
7Ce anomaly in minerals of eclogite and garnet pyroxenite from Dabie-Sulu ultrahigh pressure metamorphic belt:Tacking subducted sediment formed under oxidizing conditions显示文摘In-situ excimer laser ICP-MS analysis of minerals of eclogites and garnet pyrox- enites from type localities (Shuanghe, Maowu, Bixiling, and Yangkou) in the Dabie-Sulu ultra- high-pressure metamorphic belt reveals highly variable Ce anomalies from negative to positive in garnet. Similar Ce anomalies are also present in omphacite or clinopyroxene but to a much lesser extent. Such mixed negative and positive Ce anomalies mimic those found in severe weathering profiles developed under oxidizing conditions. They suggest the presence of sub- ducted sediment components in the eclogites and garnet pyroxenites, which in turn points to the potential importance of the recycled sediments in modification of the mantle composition during the deep subduction of the continental crust.Deltlef Günther 2004Science China Earth Sciences2004,47,10:8
8Pioneering function of Isl1 in the epigenetic control of cardiomyocyte cell fate显示文摘Generation of widely differing and specialized cell types from a single totipotent zygote involves large-scale transcriptional changes and chromatin reorganization. Pioneer transcription factors play key roles in programming the epigenome and facilitating recruitment of additional regulatory factors during successive cell lineage specification and differentiation steps. Here we show that Isl1 acts as a pioneer factor driving cardiomyocyte lineage commitment by shaping the chromatin landscape of cardiac progenitor cells. Using an Isl1 hypomorphic mouse line which shows congenital heart defects, genome-wide profiling of Isl1 binding together with RNA- and ATAC-sequencing of cardiac progenitor cells and their derivatives, we uncover a regulatory network downstream of Isl1 that orchestrates cardiogenesis. Mechanistically, we show that Isl1 binds to compacted chromatin and works in concert with the Brg1-Baf60c-based SWI/SNF complex to promote permissive cardiac lineage-specific alterations in the chromatin landscape not only of genes with critical functions in cardiac progenitor cells, but also of cardiomyocyte structural genes that are highly expressed when Isl1 itself is no longer present. Thus, the Isl1/Brg1-Baf60c complex plays a crucial role in orchestrating proper cardiogenesis and in establishing epigenetic memory of cardiomyocyte fate commitment.Rui Gao Xingqun Liang Sirisha Cheedipudi Julio Cordero Xue Jiang Qingquan Zhang Luca Caputo Stefan Günther Carsten Kuenne Yonggang Ren Shoumo Bhattacharya Xuejun Yuan Guillermo Barreto Yihan Chen Thomas Braun Sylvia M. Evans Yunfu Sun Gergana Dobreva 2019Cell Research2019,29,6:5
9白蚁的室内饲养和室内试验方法显示文摘Ⅰ.白蚁的饲养、繁殖和试验的一般先决条件 A.生物学和繁殖 B.食物 C.通风、湿度和温度 D.有毒因子、病毒、寄生菌和天敌 E.容器、防止逃跑和观察 F.采集和搬运Ⅱ.饲养和繁殖 A.成虫和早期群体的饲养 B.木白蚁科的白蚁群体(干木白蚁) C.原白蚁科的白蚁群体(湿木白蚁) D.鼻白蚁科的白蚁群体(土木两栖性白蚁) E.白蚁科的白蚁群体(营巢性白蚁) Ⅲ.Günther Becker 宋晓钢 1992白蚁科技1992,9,1:4
10黄铁矿的释光特征及其地质意义显示文摘对产于新疆阿舍勒铜矿的黄铁矿和金鑫金矿的含金黄铁矿进行了二维热释光、三维热释光和光释光分析。铜矿中黄铁矿与含金黄铁矿的热释光特征存在明显差异 ,铜矿中黄铁矿的热释光和光释光强度显著高于含金黄铁矿 ,铜矿中黄铁矿的热释光峰温度比含金黄铁矿高 15— 30℃ ;三维热释光分析中铜矿中黄铁矿的低温 (130—170℃ )发光峰波长为 72 0nm ,含金黄铁矿为 390nm。由于杂质元素的不同而导致黄铁矿的晶体结构和芯型也不同 ,铜矿中黄铁矿主要为电子芯型 ,含金黄铁矿主要为空穴芯型。谭凯旋r 刘顺生 谢焱石 Günther A. Wagne 2003核技术2003,26,1:4
11产品平台思想——把其他行业成功的思想引入到铁道车辆制造行业显示文摘概述了在铁道车辆制造领域引入产品平台这一生产管理思想 ,分析了从汽车领域引入标准化加工的可能性 ,阐述了铁道车辆工业开始运用的情况 ,并介绍了一个功能强大的 IT弹性开发工具 ,利用该工具 ,可允许按照用户的特殊要求 ,对完全参数化的车辆模型进行快速修改 ,并可使用标准化的程序 。Günther Seliger 方克娟 2002国外铁道车辆2002,39,6:4
12Triggers of histologically suspected drug-induced colitis显示文摘BACKGROUND Drug toxicity is a common and even serious problem in the gastrointestinal tract that is thought to be caused by a broad spectrum of agents.Although withdrawal of the causative agent would cure the disease knowledge is scarce and mostly derives from case reports and series.AIM To investigate potential triggers of drug-induced colitis(DiC).METHODS We conducted a retrospective,observational case control study.Patients were assigned to DiC or one of two age-and gender-matched control groups(noninflammatory controls and inflammatory colitis of another cause)based on histopathological findings.Histopathology was reassessed in a subset of patients(28 DiC with atherosclerosis,DiC without atherosclerosis and ischaemic colitis each)for validation purposes.Medical history was collected from the electronic database and patient records.Statistical analysis included chi-squared test,t-test,logistic and multivariate regression models.RESULTS Drug-induced colitis was detected in 211 endoscopically sampled biopsy specimens of the colon mucosa(7%of all screened colonoscopic biopsy samples);a total of 633 patients were included equally matched throughout the three groups(291 males,mean age:62.1±16.1 years).In the univariate analysis,DiC was associated with diuretics,dihydropyridines,glycosides,ASS,platelet aggregation inhibitors,nonsteroidal anti-inflammatory drugs(NSAIDs),statins and fibrates,and with atherosclerosis,particularly coronary heart disease,and hyperlipoproteinaemia.Echocardiographic parameters did not show substantial differences.In the multivariate analysis only fibrates[odds ratio(OR)=9.1],NSAIDs(OR=6.7)and atherosclerosis(OR=2.1)proved to be associated with DiC.Both DiC reassessment groups presented milder inflammation than ischaemic colitis.The DiC patients with atherosclerosis exhibited histological features from both DiC without atherosclerosis and ischaemic colitis.CONCLUSION Several drugs indicated for the treatment of cardiovascular and related diseases are associated with DiC.Atherosclerosis and microcirculatory disturbances seem to play an important pathogenetic role.Thorsten Brechmann Katharina Günther Matthias Neid Wolff Schmiegel Andrea Tannapfel 2019World Journal of Gastroenterology2019,25,8:3
13斯图加特市图书馆显示文摘此项目选址在市中心一个略带坡度的区域,位于斯图加特欧洲区总规划图划定区域的中心地带。这个位于城市盆地内的区域南起斯图加特火车总站,北至北部边境的海尔布隆大街。建成之后,位于Mailander Platz的斯图加特市图书馆由于其独有的设计与规模将会带动周边的发展,未来新的市中心将在此形成规模。它全新的面貌,以浅灰色清水混凝土结构的外墙和边长达45米的立方体磨砂玻璃砖特点呈现,无不向人们宣告了它的存在。Eun Young Yi Stefan Müller Günther Marsch 谢作标 2013现代装饰2013,,2:3
14APPROACHES FOR SUSTAINABLE MANUFACTURING显示文摘Sustainable development is a holistic approach harmonizing ecological, economical and socio-political needs with respect to the superior objective of enhancing human living standards. Thereby the availability of natural resources and the conservation of the ecosystems have to be considered that future generations have the possibility to meet their own needs. A long-term economical development demands the transition from a source-sink economy to a cycle economy as a result of limited resources, limited environmental capacities to absorb waste and emissions as well as increasing needs of a growing population. A reference model for sustainability in manufacturing is presented and used to illustrate sustainable approaches with respect to management, technology, process and product. Adaptation of products and components is a vital element for supporting efficient reuse of products and components. Consequently adaptation contributes to the ambitious goals of sustainability. Technological enablers for adaptation as modularity, information and communication technology are exemplarily introduced. Moreover, approaches for disseminating knowledge in sustainability are given.GüNTHER Seliger SEBASTIAN Kernbaum MARCO Zettl 2007Chinese Journal of Mechanical Engineering2007,20,1:3
15In situ analysis of major and trace elements of anhydrous minerals by LA-ICP-MS without applying an internal standard显示文摘Yongsheng Liu Zhaochu Hu Shan Gao Detlef Günther Juan Xu Changgui Gao Haihong Chen 2008Chemical Geology2008,,1:3
16High Hepatic SCD1 Activity Is Associated with Low Liver Fat Content in Healthy Subjects under a Lipogenic Diet显示文摘Günther Silbernagel Marketa Kovarova Alexander Cegan Jürgen Machann Fritz Schick Rainer Lehmann Hans-Ulrich H?ring Norbert Stefan Erwin Schleicher Andreas Fritsche Andreas Peter 2012The Journal of Clinical Endocrinology & Metabolism2012,,12:3
17Association of the GNAS1 T393C polymorphism with tumor stage and survival in gastric cancer显示文摘AIM:To analyze the impact of the GNAS1 T393C polymorphism on prognosis and histopathology of gastric cancer.METHODS:Genomic DNA was extracted from paraffinembedded tissues of 122 patients with primary gastric carcinoma and from the blood of 820 healthy white individuals.Allelic discrimination was performed by quantitative real-time polymerase chain reaction.Genotyping was correlated with histopathologic parameters and with overall survival according to the Kaplan-Meier approach and with multivariate analysis by multiple stepwise regression.RESULTS:Thirty-nine(32%) patients displayed a CC genotype,57(46.7%) a CT genotype and 26(21.3%) a TT genotype.The frequency of the C allele(fC) in the patient group was 0.55,which was not signif icantly different from that of healthy blood donors.The distribution was compatible with the Hardy-Weinberg equilibrium.Analysis of clinicopathological parameters did not show any signif icant correlation of the T393C genotype with gender(P=0.50),differentiation(P=0.29),pT-category(P=0.19),pN-category(P=0.30),pM-category(P=0.25),R-category(P=0.95),the classifications according to WHO(P=0.34),Laurén(P=0.16),Goseki(P=1.00) and Ming(P=0.74).Dichotomization between C+(CC+CT) and C-genotypes(TT),however,revealed signif icantly more advanced tumor stages(P=0.023) and lower survival rates(P=0.043) for C allele carriers.CONCLUSION:The present study provides strong evidence to suggest that the GNAS1 T393C allele carrier status influences tumor progression and survival in gastric cancer with higher tumor stages and a worse outcome for C allele carriers.Hakan Alakus Stefan P Mnig Ute Warnecke-Eberz Gül Alakus Günther Winde Uta Drebber Klaus J Schmitz Kurt W Schmid Kathrin Riemann Winfried Siffert Elfriede Bollschweiler Arnulf H Hlscher Ralf Metzger 2009World Journal of Gastroenterology2009,15,48:3
18Bovine TLR2 and TLR4 properly transduce signals from Staphylococcus aureus and E. coli , but S. aureus fails to both activate NF-κB in mammary epithelial cells and to quickly induce TNFα and interleukin-8 (CXCL8) expression in the udder显示文摘Wei Yang Holm Zerbe Wolfram Petzl Ronald Marco Brunner Juliane Günther Christian Draing Sonja von Aulock Hans-Joachim Schuberth Hans-Martin Seyfert 2007Molecular Immunology2007,,5:2
19FRAMING THE FINANCIAL THOUGHTS OF AENEAS TACTICUS: NEW APPROACHES OF THEORY TO ECONOMIC DISCOURSES IN ANTIQUITY显示文摘The recent and ongoing debate about the character of(not only)ancient economies reveals that the traditional rivalry between‘primitivist-substantivist’and‘modernist-formalist’views has defi nitely come to an end although a more or less conscious afterlife and shaping of minds still exists.1As such。Sven Günther 2014Journal of Ancient Civilizations2014,29,1:2
20Non-invasive evaluation of hepatic manifestation in Wilson disease with transient elastography, ARFI, and different fibrosis scores显示文摘Thomas Karlas Maria Hempel Michael Tr?ltzsch Dominik Huster Peter Günther Hannelore Tenckhoff Joachim M?ssner Thomas Berg Volker Keim Johannes Wiegand 2012Scandinavian Journal of Gastroenterology2012,,11:2
返回顶部 每页显示:
共30页 首页 上一页 第1页 下一页 末页 /30 跳转

网站首页 | 关于我们 | 联系我们 | 产品服务 | 客服中心 | 广告服务 | 版权声明 | 网站联盟 | 友情链接 | 售卡网点

版权所有© 渝B2-20050021-1 渝公网安备 50019002500403号 违法和不良信息举报中心

互联网出版许可证 新出网证(渝)字10号 全国400电话 - 免长途话费