Andreas Wurm, Evgeny Zhuravlev, Kathrin Eckstein, Dieter Jehnichen, Doris Pospiech, René Androsch, Bernhard Wunderlich, Christoph Schick,
The crystallization and nucleation kinetics of poly(ε-caprolactones) (PCL) with molar masses between 1.4 and 6.1 kDa and negligible number of heterogeneous nuclei has been investigated by differential fast scanning calorimetry (DFSC) applying scanning rates up to 100 000 K/s. The samples were synthesized by ring-opening polymerization and chemically characterized by NMR spectroscopy, size exclusion chromatography (SEC), and multiangle laser light scattering (MALLS). For the smallest molar mass the chain ...
Tópico(s): Polymer Nanocomposites and Properties
2012 - American Chemical Society | Macromolecules
M. Schott, Derik Hermsen, Martina Broecker-Preuß, Marco Casati, Jordi Càmara, Anja Eckstein, Dieter Gassner, Ruth Golla, Claudia Graeber, Josef van Helden, Keiko Inomata, Jochen Jarausch, Jürgen Kratzsch, Naoko Miyazaki, Miguel Ángel Navarro Moreno, Tsukasa Murakami, Heinz Jürgen Roth, Werner Stock, Jaeduk Yoshimura Noh, Werner A. Scherbaum, Klaus Mann,
Summary Background Most recently, a new rapid and fully automated electrochemiluminescence immunoassay for the determination of TSH receptor autoantibodies (TRAb) based on the ability of TRAb to inhibit the binding of a human thyroid‐stimulating monoclonal antibody (M22) has been established. Objective To evaluate this assay system in clinical routine based on an international multicentre trial and to compare the results with other established TRAb assays. Patients and measurements Totally 508 Graves’ ...
Tópico(s): Ophthalmology and Eye Disorders
2008 - Wiley | Clinical Endocrinology
Derik Hermsen, Martina Broecker-Preuß, Marco Casati, Jordi Càmara, Anja Eckstein, Dieter Gassner, Josef van Helden, Keiko Inomata, Jochen Jarausch, Jürgen Kratzsch, Klaus Mann, Naoko Miyazaki, Miguel Ángel Navarro Moreno, Tsukasa Murakami, Heinz-Jürgen Roth, Jaeduk Yoshimura Noh, Werner A. Scherbaum, M. Schott,
Graves' disease (GD) is mediated by autoantibodies which bind to the TSH receptor (TRAb). The aim of the present study was to evaluate the technical performance of the first fully automated immunoassay for TRAb detection. The Elecsys® Anti-TSHR immunoassay utilizes a porcine TSH receptor (TSHR) and the human thyroid stimulating monoclonal TSHR autoantibody M22. Intraassay and total imprecision CV were determined between 1.4%–14.9%, and 2.4%–28.8%, respectively. Using the 20% CV criteria the functional ...
Tópico(s): Hypothalamic control of reproductive hormones
2008 - Elsevier BV | Clinica Chimica Acta
S. Müller, Robert Eckstein, Dieter Hofmann, L. Kadinski, Peter Kaufmann, M. Kölbl, Erwin Schmitt,
Tópico(s): Diverse Industrial Engineering Technologies
1998 - Trans Tech Publications | Materials science forum
J. Heindl, W. Dorsch, H. P. Strunk, St.G. Müller, R. Eckstein, Dieter Hofmann, A. Winnacker,
Silicon carbide, a potentially powerful device material, suffers from microscopic hollow defects called micropipes. Their nature is not satisfactorily clarified yet. Our analysis shows that they are hollow core dislocations according to Frank's model, but contain dislocations of mixed type.
Tópico(s): Semiconductor materials and interfaces
1998 - American Physical Society | Physical Review Letters
Ove Nilsson, Harald Mehling, Ronny Horn, J. Fricke, Rainer Hofmann, S. Müller, Robert Eckstein, Dieter Hofmann,
Tópico(s): Aluminum Alloys Composites Properties
1997 - Old City Publishing, Inc. | High Temperatures-High Pressures
J. Heindl, W. Dorsch, R. Eckstein, Dieter Hofmann, T. Marek, St.G. Müller, H. P. Strunk, A. Winnacker,
We measure the radii of micropipes at the {0001} surface of modified Lely grown 6H-SiC and the total step height of the accompanying growth spirals by using atomic force microscopy. The micropipes lie in the center of spirals; the total step height ranges between one and 19 unit-cells (1.5–28.5 nm). We fit Frank's theory of hollow core dislocations as modified with regard to kinetic effects by Cabrera and Levine to these experimental results and obtain values for surface energy and supersaturation ...
Tópico(s): Solidification and crystal growth phenomena
1997 - Elsevier BV | Journal of Crystal Growth
Katarina Čufar, Eryuan Liang, Kevin T. Smith, Tomasz Ważny, Sigrid Wrobel, Paolo Cherubini, Uwe Schmitt, Alar Läänelaid, Ingo Burgert, Gerald Koch, Nathsuda Pumijumnong, Constantin Sander, Jeong‐Wook Seo, Kristina Sohar, Hitoshi Yonenobu, Ute Sass‐Klaassen,
Prof. Dr. Dieter Eckstein (1939 - 2021) significantly influenced the global development of dendrochronology and the underlying science of wood biology. Eckstein's ...
Tópico(s): Tree Root and Stability Studies
2024 - Elsevier BV | Dendrochronologia
J. J. Mendoza‐Arenas, Fernando J. Gómez-Ruiz, Martin Eckstein, Dieter Jaksch, Stephen R. L. Clark,
Motivated by cold atom and ultra-fast pump-probe experiments we study the melting of long-range antiferromagnetic order of a perfect N\'eel state in a periodically driven repulsive Hubbard model. The dynamics is calculated for a Bethe lattice in infinite dimensions with non-equilibrium dynamical mean-field theory. In the absence of driving melting proceeds differently depending on the quench of the interactions to hopping ratio $U/J_0$ from the atomic limit. For $U \gg J_0$ decay occurs due to mobile ...
Tópico(s): Quantum and electron transport phenomena
2017 - Wiley | Annalen der Physik
Xiaoming Lu, J. Julio Camarero, Yafeng Wang, Eryuan Liang, Dieter Eckstein,
In harsh and treeless environments, shrubs constitute the dominant growth form of woody plants, thus offering the opportunity to extend dendrochronological networks beyond the uppermost and northernmost distribution limits of trees. However, shrub‐based dendrochronology has so far resulted in only a few long and climate‐responsive ring‐width chronologies at such stressful sites, particularly above the alpine tree line. A previous study on an alpine Rhododendron shrub species resulted in <80‐year‐ ...
Tópico(s): Geology and Paleoclimatology Research
2015 - Wiley | Boreas
Eryuan Liang, Wenwen Liu, Ping Ren, Binod Dawadi, Dieter Eckstein,
Tópico(s): Climate change and permafrost
2014 - Springer Science+Business Media | Trees
Eryuan Liang, Binod Dawadi, Neil Pederson, Dieter Eckstein,
Birch ( Betula ) trees and forests are found across much of the temperate and boreal zones of the Northern Hemisphere. Yet, despite being an ecologically significant genus, it is not well studied compared to other genera like Pinus , Picea , Larix , Juniperus , Quercus , or Fagus . In the Himalayas, Himalayan birch ( Betula utilis ) is a widespread broadleaf timberline species that survives in mountain rain shadows via access to water from snowmelt. Because precipitation in the Nepalese Himalayas decreases with increasing ...
Tópico(s): Forest ecology and management
2014 - Wiley | Ecology
Goddert von Oheimb, Werner Härdtle, Dieter Eckstein, Hans-Hermann Engelke, Timo Hehnke, Bettina Wagner, Andreas Fichtner,
There is ample evidence that continuously existing forests and afforestations on previously agricultural land differ with regard to ecosystem functions and services such as carbon sequestration, nutrient cycling and biodiversity. However, no studies have so far been conducted on possible long-term (>100 years) impacts on tree growth caused by differences in the ecological continuity of forest stands. In the present study we analysed the variation in tree-ring width of sessile oak (Quercus petraea (Matt.) ...
Tópico(s): Plant Water Relations and Carbon Dynamics
2014 - Public Library of Science | PLoS ONE
Kristina Sohar, Alar Läänelaid, Dieter Eckstein, Samuli Helama, Jaak Jaagus,
Tópico(s): Geology and Paleoclimatology Research
2014 - Springer Science+Business Media | European Journal of Forest Research
Bo Liu, Yan Li, Dieter Eckstein, Liping Zhu, Binod Dawadi, Eryuan Liang,
Tópico(s): Ecology and Vegetation Dynamics Studies
2012 - Springer Science+Business Media | Trees
Yafeng Wang, Katarina Čufar, Dieter Eckstein, Eryuan Liang,
Little is known about tree height and height growth (as annual shoot elongation of the apical part of vertical stems) of coniferous trees growing at various altitudes on the Tibetan Plateau, which provides a high-elevation natural platform for assessing tree growth performance in relation to future climate change. We here investigated the variation of maximum tree height and annual height increment of Smith fir (Abies georgei var. smithii) in seven forest plots (30 m×40 m) along two altitudinal transects ...
Tópico(s): Forest ecology and management
2012 - Public Library of Science | PLoS ONE
Jeong‐Wook Seo, Dieter Eckstein, Risto Jalkanen,
This exploratory study on Scots pine in subarctic Finland was aimed at identifying the climatic signal(s) ‘archived’ in cellular anatomy and tree-ring variables, such as diameter and wall thickness of tracheids, or early- and latewood width, respectively. For this purpose, these variables were measured in increment cores year by year from 1961–2008 and compared to each other. According to the low values of some statistical descriptors ( e.g., expressed population signal and mean sensitivity) the cell- ...
Tópico(s): Forest ecology and management
2012 - Brill | IAWA Journal
Yafeng Wang, Xiaoxia Li, Binod Dawadi, Dieter Eckstein, Eryuan Liang,
Tópico(s): Ecology and Vegetation Dynamics Studies
2012 - Springer Science+Business Media | Trees
Eryuan Liang, Yafeng Wang, Dieter Eckstein, Tianxiang Luo,
• As one of the world's highest natural tree lines, the Smith fir (Abies georgei var. smithii) tree line on the southeastern Tibetan Plateau is expected to vary as a function of climate warming. However, the spatial patterns and dynamics of the Smith fir tree line are not yet well understood. • Three rectangular plots (30 m × 150 m) were established in the natural alpine tree-line ecotone on two north-facing (Plot N1, 4390 m asl; Plot N2, 4380 m asl) and one east-facing (Plot E1, 4360 m asl) slope. Dendroecological ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2011 - Wiley | New Phytologist
Jeong‐Wook Seo, Dieter Eckstein, Risto Jalkanen, Uwe Schmitt,
Boreal forests are highly sensitive to climate and human impacts and therefore suitable as biological indicator for environmental changes. In this context, our study was aimed at getting deeper insight into the climate-dependence of the onset, intensity and end of wood formation of Scots pine during the growing season. We monitored the intra-annual growth dynamics of, on average, 42-year-old Scots pine trees over five consecutive years, 2000–2004, at two sites located 80 and 300 km south of the ...
Tópico(s): Tree Root and Stability Studies
2011 - Elsevier BV | Environmental and Experimental Botany
Eryuan Liang, Xiaoming Lu, Ping Ren, Xiaoxia Li, Liping Zhu, Dieter Eckstein,
Dendroclimatology is playing an important role in understanding past climatic changes on the Tibetan Plateau. Forests, however, are mainly confined to the eastern Tibetan Plateau. On the central Tibetan Plateau, in contrast, shrubs and dwarf shrubs need to be studied instead of trees as a source of climate information. The objectives of this study were to check the dendrochronological potential of the dwarf shrub Wilson juniper (Juniperus pingii var. wilsonii) growing from 4740 to 4780 m a.s.l. and ...
Tópico(s): Geology and Paleoclimatology Research
2011 - Oxford University Press | Annals of Botany
Nathsuda Pumijumnong, Dieter Eckstein,
Tópico(s): Geology and Paleoclimatology Research
2010 - Springer Science+Business Media | Trees
Eryuan Liang, Xuemei Shao, Dieter Eckstein, Xiaohong Liu,
Little is known about the spatial variability in tree growth and its responses to climate on the Tibetan Plateau; however, such information is essential for improving predictions of forest ecosystem response to climatic change. A network of 16 ring width chronologies was developed along a latitudinal transect in the Qilian Mountains, northeastern Tibetan Plateau. A principal components analysis revealed that the residual chronologies had a positive loading on the first unrotated principal component ( ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2010 - NRC Research Press | Canadian Journal of Forest Research
Reza Oladi, Kambiz Pourtahmasi, Dieter Eckstein, Achim Bräuning,
Tópico(s): Tree Root and Stability Studies
2010 - Springer Science+Business Media | Trees
Jeong‐Wook Seo, Hannu Salminen, Risto Jalkanen, Dieter Eckstein,
Tópico(s): Tree Root and Stability Studies
2010 - | BALTIC FORESTRY
Sabine Meis, Alexandra Hamacher, Darunee Hongwiset, Claudia Marzian, Michael D. Wiese, Niels Eckstein, Hans‐Dieter Royer, Didier Communi, Jean‐Marie Boeynaems, Ralf Hausmann, Günther Schmalzing, Matthias U. Kassack,
The G protein-coupled P2Y(11) receptor is involved in immune system modulation. In-depth physiological evaluation is hampered, however, by a lack of selective and potent ligands. By screening a library of sulfonic and phosphonic acid derivatives at P2Y(11) receptors recombinantly expressed in human 1321N1 astrocytoma cells (calcium and cAMP assays), the selective non-nucleotide P2Y(11) agonist NF546 [4,4'-(carbonylbis(imino-3,1-phenylene-carbonylimino-3,1-(4-methyl-phenylene)carbonylimino))-bis(1, ...
Tópico(s): Mast cells and histamine
2009 - American Society for Pharmacology and Experimental Therapeutics | Journal of Pharmacology and Experimental Therapeutics
Eryuan Liang, Dieter Eckstein, Xuemei Shao,
The seasonal dynamics of cambial activity of Chinese pine ( Pinus tabulaeformis Carr.) was studied at the northern limit of its natural distribution in a semi-arid grassland ecosystem in North China. We collected micro-cores from five even-aged trees at weekly intervals from April 15 to September 16, 2006. Cell division in the cambial zone of these trees started within the third week of May. In June and July the rate of xylem cell production was highest and around mid-August cell division ended. However, ...
Tópico(s): Geology and Paleoclimatology Research
2009 - Brill | IAWA Journal
Eryuan Liang, Dieter Eckstein,
Shrubs and dwarf shrubs are wider spread on the Tibetan Plateau than trees and hence offer a unique opportunity to expand the present dendrochronological network into extreme environments beyond the survival limit of trees. Alpine shrublands on the Tibetan Plateau are characterized by rhododendron species. The dendrochronological potential of one alpine rhododendron species and its growth response to the extreme environment on the south-east Tibetan Plateau were investigated.Twenty stem discs of ...
Tópico(s): Ecology and Vegetation Dynamics Studies
2009 - Oxford University Press | Annals of Botany
Patrick Fonti, Georg von Arx, Ignacio García‐González, Britta Eilmann, Ute Sass‐Klaassen, Holger Gärtner, Dieter Eckstein,
Summary Variability in xylem anatomy is of interest to plant scientists because of the role water transport plays in plant performance and survival. Insights into plant adjustments to changing environmental conditions have mainly been obtained through structural and functional comparative studies between taxa or within taxa on contrasting sites or along environmental gradients. Yet, a gap exists regarding the study of hydraulic adjustments in response to environmental changes over the lifetimes ...
Tópico(s): Tree Root and Stability Studies
2009 - Wiley | New Phytologist
Dieter Eckstein, Fritz Hans Schweingruber,
On the occasion of the 25th anniversary of Dendrochronologia, a short review over the first years of its existence is given and an outlook into the near future is done; both perspectives are subjectively biased.
Tópico(s): Tree Root and Stability Studies
2009 - Elsevier BV | Dendrochronologia