Zobrazeno 1 - 10
of 44
pro vyhledávání: '"Ena Smidt"'
Publikováno v:
Wood Science and Technology. 54:313-327
This study presents a new chronometric method for the dating of wood. The clock used is the chemical breakdown of specific parts, such as the acetyl groups of the hemicelluloses. The presented prediction models cover a maximum of 3000 years and inclu
Autor:
M. Zohmann-Neuberger, Johannes Tintner, Ursula Nopp-Mayr, A. Bosa, R. Rosenberger, Monika Kriechbaum, H. Nopp, Ena Smidt
Publikováno v:
Journal of Ornithology. 161:203-215
Studies on the foraging ecology of wildlife species are of fundamental importance, as foraging decisions are closely linked to ecological key issues such as resource partitioning or population dynamics. Using Black grouse as a model system, we applie
Autor:
Johannes Tintner, O. Nelle, R. Patzlaff, S. Klemm, R. R. Oliveira, Etelvino Henrique Novotny, Ena Smidt
Publikováno v:
Scientific Reports
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice)
Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
Scientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)
Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice)
Empresa Brasileira de Pesquisa Agropecuária (Embrapa)
instacron:EMBRAPA
Scientific Reports, Vol 10, Iss 1, Pp 1-11 (2020)
Based on infrared spectral characteristics, six archeological sample sets of charcoals from German (5) and Brazilian (1) sites, covering the time span from the nineteenth century CE to 3950 BCE, were compared to a chronological (present to the fiftee
Autor:
Frederick Reinig, Daniel Nievergelt, Andreas Kirchhefer, Marek Krąpiec, Bernhard Spangl, Samuli Helama, Michael Grabner, Ena Smidt, Johannes Tintner, Mauri Timonen
Publikováno v:
Scientific Reports
Scientific Reports, Vol 10, Iss 1, Pp 1-8 (2020)
Scientific Reports, Vol 10, Iss 1, Pp 1-8 (2020)
Dating of wood is a major task in historical research, archaeology and paleoclimatology. Currently, the most important dating techniques are dendrochronology and radiocarbon dating. Our approach is based on molecular decay over time under specific pr
Autor:
Denis Soldo, Christoph Pfeifer, Helga C. Lichtenegger, Franz Ottner, Ena Smidt, Karin Wriessnig, Christoph Preimesberger, Harald Rennhofer, Etelvino Henrique Novotny, Johannes Tintner
Publikováno v:
Industrial & Engineering Chemistry Research. 57:15613-15619
Charcoals were produced from spruce and beech wood under laboratory conditions at different pyrolysis temperatures (300–1300 °C). Characterization of these charcoals was conducted using eight analy...
Autor:
Johannes Tintner, Ena Smidt
Publikováno v:
Journal of Wood Science. 64:816-822
At present tapped wood of black pines (Pinus nigra var. austriaca) is mainly combusted. The priority of material use over thermal recycling has led to some considerations regarding the utilization of tapped wood. The high content of extractives sugge
Autor:
Ena Smidt, P. Martin, Franz Ottner, C. Aumüller, Hans Reschreiter, Johannes Tintner, Karin Wriessnig
Publikováno v:
Vibrational Spectroscopy. 97:39-43
Taphonomy of subfossil bark was assessed in Hallstatt, Upper Austria. Samples from the Bronze Age were compared with recent corresponding material from the same site. Preservation of the prehistoric samples was caused by storage in a salt and clay mi
Publikováno v:
Quaternary International. 457:43-49
Recent, historical, and prehistoric charcoals were characterized using FT-IR spectroscopy and simultaneous thermal analysis to support interpretation of historical and archeological data. Chemical characteristics of aging play a dominant role in term
Publikováno v:
Vibrational Spectroscopy. 85:215-221
At each step of sample handling and pretreatment it is important to consider potential effects on the result of the analysis. Sample drying is a basic procedure in sample preparation for many analyses. In practice, different sample drying procedures
Publikováno v:
Journal of Analytical and Applied Pyrolysis. 150:104865
Charcoal production is a handicraft of oldest tradition. Various types have been developed. One of the most popular in Europe was the circular kiln with vertically piled logs. Besides traditional techniques new developments arose during the last deca