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MR study of water distribution in a beech (Fagus sylvatica) branch using relaxometry methods
ID Mikac, Urška (Author), ID Merela, Maks (Author), ID Oven, Primož (Author), ID Sepe, Ana (Author), ID Serša, Igor (Author)

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Abstract
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.

Language:English
Keywords:magnetic resonance imaging (MRI), relaxation times, beech (Fagus sylvatica), wood, moisture content (MC)
Work type:Article
Typology:1.01 - Original Scientific Article
Organization:BF - Biotechnical Faculty
Publication status:Published
Publication version:Version of Record
Year:2021
Number of pages:10 str.
Numbering:Vol. 26, iss. 14, art. 4305
PID:20.500.12556/RUL-135993 This link opens in a new window
UDC:53
ISSN on article:1420-3049
DOI:10.3390/molecules26144305 This link opens in a new window
COBISS.SI-ID:71037699 This link opens in a new window
Publication date in RUL:06.04.2022
Views:386
Downloads:86
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Record is a part of a journal

Title:Molecules
Shortened title:Molecules
Publisher:MDPI
ISSN:1420-3049
COBISS.SI-ID:18462981 This link opens in a new window

Licences

License:CC BY 4.0, Creative Commons Attribution 4.0 International
Link:http://creativecommons.org/licenses/by/4.0/
Description:This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
Licensing start date:16.07.2021

Projects

Funder:ARRS - Slovenian Research Agency
Project number:P1-0060
Name:Eksperimentalna biofizika kompleksnih sistemov in slikanje v biomedicini

Funder:ARRS - Slovenian Research Agency
Project number:P4-0015
Name:Les in lignocelulozni kompoziti

Funder:ARRS - Slovenian Research Agency
Project number:J1-7042
Name:Raziskave lesa kot materiala in tkiva živih dreves z MRI

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