Shuiquan Deng, Arndt Simon, Jürgen Köhler,
... 689-1091Search for more papers by this authorJürgen Köhler Prof. Dr., Jürgen Köhler Prof. Dr. Max-Planck-Institut für Festkörperforschung, ... 689-1091Search for more papers by this authorJürgen Köhler Prof. Dr., Jürgen Köhler Prof. Dr. Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse ...
Tópico(s): Rare-earth and actinide compounds
2008 - Wiley | Angewandte Chemie International Edition
Lirong Guo, Jian-Wei Tong, Xü Liang, Jürgen Köhler, Jürgen Nuß, Yizhi Li, Li‐Min Zheng,
The solvothermal reactions of silver(I) salts with mono-organophosphonic acids, i.e.3-thienylphosphonic acid (3-TPA), phenylphosphonic acid (PPA), α-naphthylphosphonic acid (α-NPA) and cyclohexylphosphonic acid (CPA), yield four new silver(I) pyrophosphonates, namely: [Ag2(ptp)] (1), [Ag2(ppp)] (2), [Ag3(CH3CN)(pnp)(pnpH)] (3), and [Ag3(pcp)(pcpH)] (4) [ptp2− = pyro-3-thienylphosphonate, ppp2− = pyrophenylphosphonate, pnp2− = pyro-α-naphthylphosphonate, pcp2− = pyrocyclohexylphosphoante]. In all cases, the pyrophosphonate ...
Tópico(s): Metal-Organic Frameworks: Synthesis and Applications
2011 - Royal Society of Chemistry | Dalton Transactions
Feliberto de la Cruz, Andy Schumann, Stefanie Köhler, Jürgen R. Reichenbach, Gerd Wagner, Karl‐Jürgen Bär,
The peripheral autonomic nervous system (ANS) adjusts the heart rate (HR) to intrinsic and extrinsic demands. It is controlled by a group of functionally connected brain regions assembling the so-called central autonomic network (CAN). More specifically, forebrain cortical regions, limbic and brainstem structures within the CAN have been identified as important components of circuits involved in HR regulation. The present study aimed to investigate whether functional connectivity (FC) between these ...
Tópico(s): EEG and Brain-Computer Interfaces
2019 - Elsevier BV | NeuroImage
Jörg Niederberger, Martin Kohler, Jürgen Bauhus,
Abstract. Repeated, grid-based forest soil inventories such as the National Forest Soil Inventory of Germany (NFSI) aim, among other things, at detecting changes in soil properties and plant nutrition. In these types of inventories, the only information on soil phosphorus (P) is commonly the total P content. However, total P content in mineral soils of forests is usually not a meaningful variable with respect to predicting the availability of P to trees. Here we tested a modified sequential P extraction ...
Tópico(s): Peatlands and Wetlands Ecology
2019 - Copernicus Publications | SOIL
Bernd Kohler, Günter Köhler, Jürgen F. Riemann,
In a 50-yr-old male patient, a spontaneously perforating peptic ulcer located in a patch of heterotopic gastric mucosa in the upper part of the esophagus led to the development of an esophagotracheal fistula. The histologic workup revealed, in addition to ulcer necroses and granulation tissue, glands of the fundic type, with chief and parietal cells. On the basis of histologic results, the fistula was successfully occluded with the aid of a fibrin adhesive applied endoscopically. After the second ...
Tópico(s): Esophageal and GI Pathology
1988 - Elsevier BV | Gastroenterology
Petra Lindemann‐Matthies, Constantinos P. Constantinou, Xenia Junge, Karl-Heinz Kohler, Jürgen Mayer, Ueli Nagel, George Raper, Diane Schüle, Chrysanthi Kadji-Beltrán,
In this article, we present results from an international research study on biodiversity education in pre‐service education of primary school teachers. The study was carried out between 2004–2006 in four teacher education institutions in Cyprus, England, Switzerland and Germany. We used document analyses and in‐depth interviews with 27 teacher educators and 22 student teachers to examine the integration of biodiversity into the pre‐service teacher education programmes, and the student teachers' ...
Tópico(s): Conservation, Ecology, Wildlife Education
2009 - Taylor & Francis | Environmental Education Research
Roland G. Heidenreich, Klaus Köhler, Jürgen G.E. Krauter, Jörg Pietsch,
A specially optimized air-stable Pd on activated carbon catalyst is demonstrated to be a highly active (TON up to 36,000), selective and convenient heterogeneous catalyst for CC couplings of aryl halides in Heck, Suzuki, and Sonogashira reactions. The Pd/C catalyst developed allows extremely low Pd concentrations (down to 0.0025 mol% for Heck coupling, 0.005 mol% for Suzuki coupling) and high conversions of aryl bromides within a few hours. Easy and complete Pd separation and recovery is possible.
Tópico(s): Asymmetric Hydrogenation and Catalysis
2002 - Thieme Medical Publishers (Germany) | Synlett
Thomas Köhler, Jürgen Faderl, Hans Pritzkow, Walter Siebert,
The reaction of (isopropyloxy)bis(2-thienyl)borane (1d) with Grignard reagents leads to methylbis(2-thienyl)borane (1e) and to phenylbis(2-thienyl)borane (1f). Treatment of monolithiated heterocycles with dichloroboranes yields the bis(2-heteroaryl)boranes 1b, 1c, and 3a, which are dibrominated with NBS to give the 5,5′-dibromo products 1b′, 2a′, and 3a′. NMR spectroscopic and MS data confirm the composition of the compounds. The [2+2] cyclization of the dibromo derivatives yields, in the case of 2a′, ...
Tópico(s): Chemical Synthesis and Reactions
2002 - Wiley | European Journal of Inorganic Chemistry
Christoph Schramm, Martina Protschka, H. Köhler, Jürgen Podlech, Matthias J. Reddehase, Peter Schirmacher, Peter R. Galle, Ansgar W. Lohse, Manfred Blessing,
In autoimmune hepatitis, strong TGF-β1 expression is found in the inflamed liver. TGF-β overexpression may be part of a regulatory immune response attempting to suppress autoreactive T cells. To test this hypothesis, we determined whether impairment of TGF-β signaling in T cells leads to increased susceptibility to experimental autoimmune hepatitis (EAH). Transgenic mice of strain FVB/N were generated expressing a dominant-negative TGF-β type II receptor in T cells under the control of the human ...
Tópico(s): Pediatric Hepatobiliary Diseases and Treatments
2003 - American Physiological Society | AJP Gastrointestinal and Liver Physiology
Rita Triebskorn, Heinz-Rüdiger Köhler, Jürgen Flemming, Thomas Braunbeck, Rolf-Dieter Negele, H. Rahmann,
Tópico(s): Pesticide and Herbicide Environmental Studies
1994 - Elsevier BV | Aquatic Toxicology
Gritta Veit-Köhler, Jürgen Laudien, Jan Knott, Jose Velez, Ricardo Sahade,
An in situ experiment on metazoan meiofauna colonisation and succession was carried out at Brandal (78°56.88′N, 11°51.63′E), situated in arctic glacial Kongsfjorden (Spitsbergen). 28 soft sediment containers were deployed at a depth of 20 m and sampled after a one-, two- and three-year immersion period. The main taxonomic groups, abundance of colonising meiofauna and sediment parameters are described and compared. Meiofauna communities at Brandal show the highest densities reported for inner Kongsfjorden ...
Tópico(s): Geology and Paleoclimatology Research
2008 - Elsevier BV | Journal of Experimental Marine Biology and Ecology
Katrin R. Strehle, Dana Cialla‐May, Petra Rösch, Thomas Henkel, Michael Köhler, Jürgen Popp,
The application of a liquid/liquid microsegmented flow for serial high-throughput microanalytical systems shows promising prospects for applications in clinical chemistry, pharmaceutical research, process diagnostics, and analytical chemistry. Microscopy and microspectral analytics offer powerful approaches for the analytical readout of droplet based assays. Within the generated segments, individuality and integrity are retained during the complete diagnostic process making the approach favored ...
Tópico(s): Spectroscopy Techniques in Biomedical and Chemical Research
2007 - American Chemical Society | Analytical Chemistry
Anna‐Katharina Thomas‐Kaskel, Dominik Mattern, Gabriele Köhler, Jürgen Finke, Dirk Behringer,
In thrombocytopenic conditions of unknown origin, quantification of reticulated platelets (RP) in the peripheral blood by flow cytometry has been shown to differentiate increased platelet (Plt) turnover from insufficient Plt production.We used a whole blood flow cytometry method combining thiazole orange and anti-CD41a-staining to assess RP in 71 healthy subjects, six with thrombocytopenic myelodysplastic syndrome (MDS), nine with liver cirrhosis, 14 patients with idiopathic thrombocytopenic purpura ( ...
Tópico(s): Myeloproliferative Neoplasms: Diagnosis and Treatment
2007 - Wiley | Cytometry Part B Clinical Cytometry
Susan Kralisch, Grit Sommer, Verena Stangl, Uwe Köhler, Jürgen Kratzsch, Holger Stepan, R Faber, Andreas Schubert, Ulrike Lössner, Angelika Vietzke, Matthias Blüher, Michael Stümvoll, Mathias Faßhauer,
Hyperplasia and hypertrophy of fat cells can be found in obesity, and increased adiposity is associated with endothelial dysfunction as an early event of atherosclerosis. However, it is unclear whether human adipocytes directly influence endothelial function. To study the crosstalk between fat and endothelial cells, human umbilical venous endothelial cells (HUVECs), and human coronary artery endothelial cells (HCAECs) were cultured in infranatants (Adipo) of primary differentiated human adipocytes. ...
Tópico(s): Cell Adhesion Molecules Research
2007 - Elsevier BV | Atherosclerosis
Arne Gruen, Thabea Musik, Christhardt Köhler, Jürgen Füller, Thomas Wendt, Carmen Stromberger, Volker Budach, Achim Schneider, Simone Marnitz,
Tópico(s): Endometriosis Research and Treatment
2011 - Springer Science+Business Media | Strahlentherapie und Onkologie
Simone Marnitz, Christhardt Köhler, Jürgen Füller, W. Hinkelbein, Achim Schneider,
Tópico(s): Management of metastatic bone disease
2006 - Springer Science+Business Media | Strahlentherapie und Onkologie
Mike Köhler, Jürgen Hasch, Hans Ludwig Blöcher, Lorenz-Peter Schmidt,
Radar sensors are used widely in modern driver assistance systems. Available sensors nowadays often operate in the 77 GHz band and can accurately provide distance, velocity, and angle information about remote objects. Increasing the operation frequency allows improving the angular resolution and accuracy. In this paper, the technical feasibility to move the operation frequency beyond 100 GHz is discussed, by investigating dielectric properties of radome materials, the attenuation of rain and atmosphere, ...
Tópico(s): RFID technology advancements
2012 - Cambridge University Press | International Journal of Microwave and Wireless Technologies
Trevor Martin, Joachim Moecks, A. Belooussov, Saira Cawthraw, B. Dolenko, Michael Eiden, J. von Frese, W. Köhler, Jürgen Schmitt, Ray Somorjai, Thomas Udelhoven, S. Verzakov, Wolfgang Petrich,
Signatures of Bovine Spongiform Encephalopathy (BSE) have been identified in serum by means of "Diagnostic Pattern Recognition (DPR)". For DPR-analysis, mid-infrared spectroscopy of dried films of 641 serum samples was performed using disposable silicon sample carriers and a semi-automated DPR research system operating at room temperature. The combination of four mathematical classification approaches (principal component analysis plus linear discriminant analysis, robust linear discriminant analysis, ...
Tópico(s): Salmonella and Campylobacter epidemiology
2004 - Royal Society of Chemistry | The Analyst
Axel Liebscher, Fabian Möller, Andreas Bannach, Sebastian Köhler, Jürgen Wiebach, Cornelia Schmidt‐Hattenberger, Mikaela Weiner, Carsten Pretschner, Kay Ebert, Jochen Zemke,
The Ketzin pilot site for geological storage of CO2 in the German Federal State of Brandenburg about 25 km west of Berlin is the only German CO2 storage site and has been the first European pilot site for on-shore storage of CO2 in saline aquifers. Continuous injection of CO2 started on June 30th, 2008, and a total of 61,396 t of CO2 have been injected by September 2012. The injected CO2 was predominantly food-grade with a purity > 99.9%, only from May to June 2011, 1515 t CO2 from the Schwarze Pumpe ...
Tópico(s): Hydraulic Fracturing and Reservoir Analysis
2013 - Elsevier BV | International journal of greenhouse gas control
Henning Adamek, A. Buttmann, Robert Wessbecher, Bernd Kohler, Jürgen F. Riemann,
Tópico(s): Gallbladder and Bile Duct Disorders
1995 - Springer Science+Business Media | Digestive Diseases and Sciences
Matthias Eikermann, K. Renzing‐Köhler, Jürgen Peters,
Background: To define the rocuronium doses which would provide 50%, 90%, and 95% probability of ‘acceptable’ intubation conditions during light sevoflurane anaesthesia, we studied 60 children aged 2–7 years in a prospective, randomised, assessor blinded study. Methods: After mask ventilation with 1 MAC sevoflurane/N 2 O for 17±1 (x̌±SD) min we administered rocuronium (either 0.15, 0.22, 0.3, 0.5, or 1.0 mg · kg −1 ) or placebo, and quantified the evoked force of the adductor pollicis muscle. ...
Tópico(s): Airway Management and Intubation Techniques
2001 - Wiley | Acta Anaesthesiologica Scandinavica
Theresa J. Bachschmidt, Michael Köhler, Jürgen Nistler, Christian Geppert, Peter M. Jakob, Mathias Nittka,
To investigate the benefit of a two-channel transmit system on shading close to total hip replacements and other elongated metal structures in parallel to the magnet bore.An analytical model comprising a water cylinder and a metal rod is introduced to describe the B1 effects close to elongated metal structures and it is verified. The dependence of the optimal polarization, which induces minimum shading, on the position of the metal is analyzed. Furthermore, the optimal polarization for two patients ...
Tópico(s): Ultrasound and Hyperthermia Applications
2015 - Wiley | Magnetic Resonance in Medicine
Julia A. Sohn, Florian Härtig, Martin Kohler, Jürgen Huss, Jürgen Bauhus,
Abstract Droughts and their negative effects on forest ecosystems are projected to increase under climate change for many regions. It has been suggested that intensive thinning could reduce drought impacts on established forests in the short‐term. Most previous studies on the effect of thinning on drought impacts, however, have been confined to single forest sites. It is therefore still unclear how general and persisting the benefits of thinning are. This study assesses the potential of thinning ...
Tópico(s): Forest ecology and management
2016 - Wiley | Ecological Applications
Klaus Ruckdeschel, Suzanne Harb, Andreas Roggenkamp, Mathias W. Hornef, Robert Zumbihl, Stephan Köhler, Jürgen Heesemann, Bruno Rouot,
In this study, we investigated the activity of transcription factor NF-κB in macrophages infected with Yersinia enterocolitica. Although triggering initially a weak NF-κB signal, Y. enterocolitica inhibited NF-κB activation in murine J774A.1 and peritoneal macrophages within 60 to 90 min. Simultaneously, Y. enterocolitica prevented prolonged degradation of the inhibitory proteins IκB-α and IκB-β observed by treatment with lipopolysaccharide (LPS) or nonvirulent, plasmid-cured yersiniae. Analysis ...
Tópico(s): Immune Response and Inflammation
1998 - Rockefeller University Press | The Journal of Experimental Medicine
Produção Nacional
Luciana Di Ciero, Maria Luíza Vilela Oliva, Ricardo J.S. Torquato, Peter Köhler, Jürgen K. P. Weder, José C. Novello, Cláudio A.M. Sampaio, Benedito Oliveira, Sérgio Marangoni,
Tópico(s): Protein Hydrolysis and Bioactive Peptides
1998 - Springer Science+Business Media | Journal of Protein Chemistry
Franziska Schirrmacher, Thomas Köhler, Jürgen Endres, Tobias Lindenberger, Lennart Husvogt, James G. Fujimoto, Joachim Hornegger, Arnd Dörfler, Philip Hoelter, Andreas Maier,
This paper introduces an universal and structure-preserving regularization term, called quantile sparse image (QuaSI) prior. The prior is suitable for denoising images from various medical imaging modalities. We demonstrate its effectiveness on volumetric optical coherence tomography (OCT) and computed tomography (CT) data, which show different noise and image characteristics. OCT offers high-resolution scans of the human retina but is inherently impaired by speckle noise. CT on the other hand has ...
Tópico(s): Photoacoustic and Ultrasonic Imaging
2018 - Elsevier BV | Medical Image Analysis
Cristina Manjón, Bartlomiej J. Troczka, Marion Zaworra, Katherine Beadle, Emma Randall, Gillian Hertlein, Kumar Saurabh Singh, Christoph T. Zimmer, Rafael A. Homem, Bettina Lueke, Rebecca J. Reid, Laura Kor, Maxie Kohler, Jürgen Benting, Martin S. Williamson, T. G. E. Davies, L. M. Field, Chris Bass, Ralf Nauen,
The impact of neonicotinoid insecticides on the health of bee pollinators is a topic of intensive research and considerable current debate [1Cressey D. The bitter battle over the world's most popular insecticides.Nature. 2017; 551: 156-158Crossref PubMed Scopus (43) Google Scholar]. As insecticides, certain neonicotinoids, i.e., N-nitroguanidine compounds such as imidacloprid and thiamethoxam, are as intrinsically toxic to bees as to the insect pests they target. However, this is not the case for ...
Tópico(s): Insect-Plant Interactions and Control
2018 - Elsevier BV | Current Biology
Tobias Förster, Clara Köhler, Jürgen Debus, Juliane Hörner‐Rieber,
Breast-conserving therapy including lumpectomy and adjuvant whole breast irradiation (WBI) has become the standard therapy for early-stage breast cancer (EBC). Without WBI, the recurrence rate is significantly increased. However, when selecting patients at a low a priori risk of local recurrence only a small breast-cancer-specific mortality benefit, but no overall survival improvement, was detected for WBI. As most recurrences occur close to the lumpectomy cavity, accelerated partial breast irradiation ( ...
Tópico(s): BRCA gene mutations in cancer
2020 - Karger Publishers | Breast Care
Hoang Tu-Rapp, André Hammermüller, Eilhard Mix, Hans‐Jürgen Kreutzer, R. Goerlich, Hans-Jürgen Köhler, Horst Nizze, Hans‐Jürgen Thiesen, Saleh Ibrahim,
Collagen-induced arthritis (CIA) is a chronic inflammatory disease bearing all the hallmarks of rheumatoid arthritis, e.g. polyarthritis, synovitis, and subsequent cartilage/bone erosions. One feature of the disease contributing to joint damage is synovial hyperplasia. The factors responsible for the hyperplasia are unknown; however, an imbalance between rates of cell proliferation and cell death (apoptosis) has been suggested. To evaluate the role of a major pathway of cell death - Fas (CD95)/FasL - in ...
Tópico(s): Cell Adhesion Molecules Research
2004 - BioMed Central | Arthritis Research & Therapy
Jörg Niederberger, Martin Kohler, Jürgen Bauhus,
Trees have developed mechanisms to obtain soil phosphorus from less available and recalcitrant P forms. Therefore, assessments of P availability to trees should consider not only readily plant-available fractions, as is typically done in agriculture, but also fractions of different availability, such as those generated by sequential extraction as suggested by Hedley, M.J., Stewart, J.W.B. and Chauhan, B.S. 1982 Changes in inorganic and organic soil phosphorus fractions induced by cultivation practices ...
Tópico(s): Peatlands and Wetlands Ecology
2016 - Oxford University Press | Forestry An International Journal of Forest Research