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MR Study of Water Distribution in a Beech (Fagus sylvatica) Branch Using Relaxometry Methods

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 chan...

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Autores principales: Mikac, Urša, Merela, Maks, Oven, Primož, Sepe, Ana, Serša, Igor
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8307733/
https://www.ncbi.nlm.nih.gov/pubmed/34299580
http://dx.doi.org/10.3390/molecules26144305
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author Mikac, Urša
Merela, Maks
Oven, Primož
Sepe, Ana
Serša, Igor
author_facet Mikac, Urša
Merela, Maks
Oven, Primož
Sepe, Ana
Serša, Igor
author_sort Mikac, Urša
collection PubMed
description 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 (1)H NMR relaxometry as well as by spatial mapping of the relaxation times T(1) and T(2). 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.
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spelling pubmed-83077332021-07-25 MR Study of Water Distribution in a Beech (Fagus sylvatica) Branch Using Relaxometry Methods Mikac, Urša Merela, Maks Oven, Primož Sepe, Ana Serša, Igor Molecules Article 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 (1)H NMR relaxometry as well as by spatial mapping of the relaxation times T(1) and T(2). 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. MDPI 2021-07-16 /pmc/articles/PMC8307733/ /pubmed/34299580 http://dx.doi.org/10.3390/molecules26144305 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mikac, Urša
Merela, Maks
Oven, Primož
Sepe, Ana
Serša, Igor
MR Study of Water Distribution in a Beech (Fagus sylvatica) Branch Using Relaxometry Methods
title MR Study of Water Distribution in a Beech (Fagus sylvatica) Branch Using Relaxometry Methods
title_full MR Study of Water Distribution in a Beech (Fagus sylvatica) Branch Using Relaxometry Methods
title_fullStr MR Study of Water Distribution in a Beech (Fagus sylvatica) Branch Using Relaxometry Methods
title_full_unstemmed MR Study of Water Distribution in a Beech (Fagus sylvatica) Branch Using Relaxometry Methods
title_short MR Study of Water Distribution in a Beech (Fagus sylvatica) Branch Using Relaxometry Methods
title_sort mr study of water distribution in a beech (fagus sylvatica) branch using relaxometry methods
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8307733/
https://www.ncbi.nlm.nih.gov/pubmed/34299580
http://dx.doi.org/10.3390/molecules26144305
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