MR Study of Water Distribution in a Beech (Fagus sylvatica) Branch Using Relaxometry Methods
| Autor: | Igor Serša, Ana Sepe, Primož Oven, Maks Merela, Urša Mikac |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
0106 biological sciences
Relaxometry Materials science magnetic resonance imaging (MRI) udc:53 relaxation times Pharmaceutical Science Organic chemistry Soil science 01 natural sciences Analytical Chemistry QD241-441 Fagus sylvatica 010608 biotechnology Drug Discovery Physical and Theoretical Chemistry Beech Water content 040101 forestry Water transport biology Moisture Relaxation (NMR) Spatial mapping beech (Fagus sylvatica) 04 agricultural and veterinary sciences biology.organism_classification Chemistry (miscellaneous) 0401 agriculture forestry and fisheries Molecular Medicine moisture content (MC) wood |
| Zdroj: | Molecules, Vol 26, Iss 4305, p 4305 (2021) Molecules Volume 26 Issue 14 Molecules, vol. 26, no. 14, 4305, 2021. |
| ISSN: | 1420-3049 |
| Popis: | Wood is a widely used material because it is environmentally sustainable, renewable and relatively inexpensive. Due to the hygroscopic nature of wood, its physical and mechanical properties as well as the susceptibility to fungal decay are strongly influenced by its moisture content, constantly changing in the course of everyday use. Therefore, the understanding of the water state (free or bound) and its distribution at different moisture contents is of great importance. In this study, changes of the water state and its distribution in a beech sample while drying from the green (fresh cut) to the absolutely dry state were monitored by 1D and 2D 1H NMR relaxometry as well as by spatial mapping of the relaxation times T1 and T2. The relaxometry results are consistent with the model of homogeneously emptying pores in the bioporous system with connected pores. This was also confirmed by the relaxation time mapping results which revealed the moisture transport in the course of drying from an axially oriented early- and latewood system to radial rays through which it evaporates from the branch. The results of this study confirmed that MRI is an efficient tool to study the pathways of water transport in wood in the course of drying and is capable of determining the state of water and its distribution in wood. |
| Databáze: | OpenAIRE |
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