TY - JOUR A1 - Schmelzle, Sebastian A1 - Bruns, Stefan A1 - Beckmann, Felix A1 - Moosmann, Julian A1 - Lautner, Silke T1 - Using In Situ Synchrotron-Radiation-Based Microtomography to Investigate 3D Structure-Dependent Material Properties of Tension Wood JF - Advanced Engineering Materials N2 - Synchrotron-radiation-based microtomography enables the 3D analysis of biological samples in situ beyond simple visualization, providing accurate measurements and recording of temporal data. The microtomography end station at P05 (PETRA III, Hamburg, Germany), operated by the Helmholtz Zentrum Hereon, can accommodate complex sample environments such as a load frame for mechanical testing. Herein, the strain analysis of a volumetric time series dataset of small hardwood samples is presented. For this in situ mechanical testing, the load frame is operated in tensile mode, and the biogenic material samples are subdivided into those specialized for tensile forces and those of regular anatomical structure. Digital volume correlation analysis allows for the prediction of strain development at any position in the sample. The tissue specialized for tensile strength can align dislocations formed under tension such that the deformation is stronger and more ordered. The results show how high-resolution imaging of sequential loading and the subsequent localization of strain can reveal functional morphological relationships. These methods can be extended to other biological materials and may prove to be extremely relevant for the analyses of fibrous and/or layered composite materials. KW - digital volume correlation KW - load frame KW - mechanical testing KW - synchroton-radiation-based-microtomography KW - wood Y1 - 2021 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-1925 SN - 1438-1656 VL - 23 IS - 11 SP - 1 EP - 11 PB - Wiley ER - TY - CHAP A1 - Lautner, Silke A1 - Lenz, Claudia A1 - Hammel, Jörg A1 - Moosmann, Julian A1 - Kühn, Michael A1 - Caselle, Michele A1 - Vogelgesang, Matthias A1 - Kopmann, Andreas A1 - Beckmann, Felix T1 - Using SRμCT to define water transport capacity in Picea abies. SPIE Optics+Photonics Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-7636 N1 - August 06-10, 2017, San Diego Convention Center, San Diego, California, USA ER - TY - CHAP A1 - Lenz, Claudia A1 - Lautner, Silke T1 - Trockenheitsgefährdung und Anpassung unterschiedlicher Fichtenpopulationen (Fichte-Trockenheit) Y1 - 2019 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-7641 N1 - Erste HNEE Nachhaltigkeitstage vom 20. bis 24. Mai 2019, Poster Präsentation von HNEE-Forschungsprojekten ER - TY - CHAP A1 - Sanne, Moritz A1 - Kampe, Anja A1 - Lenz, Claudia A1 - Gossel, Stefan A1 - Wagner, Sabine A1 - Haibel, Astrid A1 - Melcher, Eckhard A1 - Leu, Carsten A1 - Pfriem, Alexander A1 - Lautner, Silke ED - Engelund Thybring, Emil T1 - Anatomical studies of wood treated with pressure pulse shock waves T2 - Proceedings of the 13th annual meeting of the Northern European Network for Wood Science and Engineering (WSE2017) N2 - Similar to a normal wave, a shock wave travels as energy through matter but it causes an abrupt raise of pressure, temperature and density. In this study the influence of shock waves on wood structure were investigated in the light of possible future industrial utilization e.g. timber impregnating treatment. KW - shock wave; pressure pulse; impregnation; microtomography Y1 - 2017 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-6841 ER - TY - CHAP A1 - Lenz, Claudia A1 - Lautner, Silke A1 - Melcher, Eckhard A1 - Möller, Ralf ED - Wilson, P. T1 - Microscopic investigations concerning in situ copper oxalate formation T2 - Proceedings of the 10th annual meeting of the Northern European Network for Wood Science and Engineering (WSE 2014) Y1 - 2014 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-7597 N1 - October 13-14, 2014, Edinburgh, Scotland SP - 231 EP - 231 ER - TY - GEN A1 - Sanne, Moritz A1 - Kampe, Anja A1 - Lenz, Claudia A1 - Gossel, Stefan A1 - Wagner, Sabine A1 - Haibel, Astrid A1 - Melcher, Eckhard A1 - Leu, Carsten A1 - Pfriem, Alexander A1 - Lautner, Silke T1 - Introduction of shock wave technology to fir wood preservation T2 - International Wood Products Journal N2 - Similar to a normal wave, a shock wave travels as energy through matter but it causes an abrupt rise of pressure, temperature and density. In this study, the influence of shock waves on wood structure were investigated in the light of possible future industrial utilization e.g. timber impregnating treatment. The constructed autoclave is capable of creating shock waves either by an electrical pulse breakdown of a spark gap arrangement or by electromagnetic actuators. The penetration depths of the fir wood test samples were measured using light microscopy, SEM and micro-computed tomography. Our results showed that by varying the intensity of the incident shock wave, the distance between the shock wave generating device and the test sample, and/or the orientation of test sample in relation to the shockwave, the wood tissue structure had been heavily disintegrated or hardly affected at all. An improvement on impregnation could not be found. KW - Shock wave; pressure pulse; wood impregnation; X-ray computed microtomography; GIS for area calculation Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-4536 SN - 2042-6445 VL - 12 IS - 1 SP - 3 EP - 6 PB - Taylor & Francis ER - TY - JOUR A1 - Creydt, Marina A1 - Lautner, Silke A1 - Fromm, Jörg A1 - Fischer, Markus T1 - Wood profiling by non-targeted liquid chromatography high-resolution mass spectrometry: Part 2, Detection of the geographical origin of spruce wood (Picea abies) by determination of metabolite pattern JF - Journal of Chromatography A N2 - A non-targeted metabolomics-based approach using liquid chromatography high-resolution mass spectrometry was used to authenticate spruce wood (Picea abies) from two geographic source areas. The two sample sites were located in Germany and only 250 km apart. In order to achieve the highest possible metabolite coverage, the spruces samples were measured with four different methods using liquid chromatography high-resolution mass spectrometry. In this way, a total of approximately 4,100 features were detected, which included non-polar, polar, and intermediate-polar metabolites. Using supervised multivariate methods, a distinction between the two sample groups could be achieved on the basis of non-polar data sets. The major metabolites contributing to differentiation were identified by MS/MS experiments and were from the following classes of compounds: ceramides, fatty acids, glycerolipids, and phytosterols. Based on the soil descriptions of the two sites, it was concluded that there is probably a close relationship between nutrient availability and the differences in concentration of the marker compounds. The results show that a metabolomics-based approach is also suitable for differentiation of origin, even if the sample sites are close to each other. Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-4925 SN - 1873-3778 SN - 0021-9673 IS - 1663 PB - Elsevier ER - TY - CHAP A1 - Lautner, Silke T1 - Gemeinschaftlich gestellte Klausur T2 - Kompetent Prüfungen gestalten Y1 - 2022 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:eb1-opus-6711 SN - 9783825258597 SP - 164 EP - 167 PB - UTB ET - 2. überarb. u. erw. Aufl. ER -