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Radial variation of total phenol content in beech (Fagus sylvatica L.) wood with and without red heartwood

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Abstract

A comparative study of the radial distribution of the total phenol contents has been carried out on two Beech (Fagus sylvatica L.) discs, one with red heartwood and the other without red heartwood. The wood disc samples were investigated immediately after felling and at the different stages of room-drying. In the disc without red heartwood the concentrations increased from the bark towards the pith. In the disc with red heartwood the total phenol concentration rose steeply in front of the colour boundary, but this could only be measured in the fresh tissues. This suggests, that in these tissues either the formation of phenols (accumulation) is more intense or that special phenols are also formed. Beyond the boundary the concentration decreased dramatically. After drying of the wood samples the concentration decreased in all wood parts of the discs, but the amount of this is the highest in the white tissues next to the red heartwood. The results prove that the transformation of the phenols in the white tissues next to the colour boundary takes place faster.

Zusammenfassung

Eine vergleichende Studie über die radiale Verteilung des Gesamtphenols wurde an zwei Buchenscheiben (Fagus sylvatica L.) durchgeführt, eine mit, die andere ohne rotem Kernholz. Die Proben der Holzscheiben wurden unmittelbar nach dem Fällen sowie in verschiedenen Stufen der Lufttrocknung untersucht. Bei der rotkernlosen Scheibe stieg die Konzentration von der Borke bis zum Mark an. In der Scheibe mit rotem Kernholz stieg die Phenolkonzentration vor der Farbgrenze steil an, was jedoch nur in frischen Geweben gemessen werden konnte. Dies läßt vermuten, dass in diesen Geweben die Phenol-Ablagerung intensiver ist, oder dass es hier spezielle Phenole synthetisiert werden. Jenseits der Grenze ist der Konzentrationsanstieg dramatisch. Nach dem Trocknen der Holzproben sank die Konzentration in allen Holzteilen der Scheiben, aber dieser Betrag ist der höchste in weißem Gewebe, in der Nähe des Rotkerns. Die Ergebnisse beweisen, dass die Transformation von Phenolen in weißem Gewebe nahe der Farbgrenze schneller stattfindet.

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Authors and Affiliations

  1. Institute for Chemistry, University of West Hungary, P.O.Box 132, 9401, Sopron, Hungary

    L. Albert, T. Hofmann, Zs. I. Németh & T. Rétfalvi

  2. Department of Silviculture, University of West Hungary, P.O.Box 132, 9401, Sopron, Hungary

    J. Koloszár, Sz. Varga & I. Csepregi

Authors
  1. L. Albert
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  2. T. Hofmann
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  3. Zs. I. Németh
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  4. T. Rétfalvi
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  5. J. Koloszár
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  6. Sz. Varga
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  7. I. Csepregi
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Corresponding author

Correspondence to L. Albert.

Additional information

This work was supported by a grant of the Hungarian Science Foundation ( OTKA T020473).

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Albert, L., Hofmann, T., Németh, Z.I. et al. Radial variation of total phenol content in beech (Fagus sylvatica L.) wood with and without red heartwood. Holz Roh Werkst 61, 227–230 (2003). https://doi.org/10.1007/s00107-003-0381-x

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  • DOI: https://doi.org/10.1007/s00107-003-0381-x

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