mriselMagnetic Resonance in SolidsMagnetic Resonance in Solids2072-5981Kazan Federal Universitymrisel-134Research ArticleСтатьиElectron paramagnetic resonance and quantitative color investigations of various vacuum heat treated wood speciesKondratyevaE. I.

Kremlevskaya 18, 420008 Kazan; L.Bulachnaya 36a, Kazan 420111

katarina.kondratyeva@gmail.comSafiullinK. R.

Kremlevskaya 18, 420008 Kazan; L.Bulachnaya 36a, Kazan 420111

MotygullinI. G.

Kremlevskaya 18, 420008 Kazan

KlochkovA. V.

Kremlevskaya 18, 420008 Kazan; L.Bulachnaya 36a, Kazan 420111

TagirovM. S.

Kremlevskaya 18, 420008 Kazan; L.Bulachnaya 36a, Kazan 420111

KuzminV. V.

Kremlevskaya 18, 420008 Kazan

Kazan Federal University; Institute of Perspective Research, TASRussian FederationKazan Federal UniversityRussian Federation20152212201517215204 (8 pp.)Copyright © Kondratyeva E.I., Safiullin K.R., Motygullin I.G., Klochkov A.V., Tagirov M.S., Kuzmin V.V., 20242024Kondratyeva E.I., Safiullin K.R., Motygullin I.G., Klochkov A.V., Tagirov M.S., Kuzmin V.V.Kondratyeva E.I., Safiullin K.R., Motygullin I.G., Klochkov A.V., Tagirov M.S., Kuzmin V.V.Данная работа распространяется под лицензией Creative Commons Attribution 4.0.This work is licensed under a Creative Commons Attribution 4.0 License.https://www.mrsej.ru/jour/article/view/134

The effect of the heat treatment duration on the electron paramagnetic resonance signal amplitude of free radicals for various wood species was observed. It was found that the amplitude of the electron paramagnetic resonance signal grows linearly with the vacuum heat treatment duration. The quantitative measurements of color changes for various wood species (pine, spruce, larch, birch and small-leaved lime) were performed. It is found that results of EPR experiments and color measurements of heat treated samples correlate with each other.

colorimetryEPRvacuumthermal modificationheat treatmentwoodThe work is performed according to the Russian Government Program of Competitive Growth of Kazan Federal University.ReferencesEsteves B., Pereira H., BioResources 4, 370 (2008).Esteves B., Pereira H., BioResources 4, 370 (2008).Hon D., Ifju G., Feist W., et al., Wood and fiber 12, 121 (1980).Hon D., Ifju G., Feist W., et al., Wood and fiber 12, 121 (1980).Humar M., Straˇze A., ˇSentjurc M., Pohleven F., European Journal of Wood and Wood Products 64, 515 (2006).Humar M., Straˇze A., ˇSentjurc M., Pohleven F., European Journal of Wood and Wood Products 64, 515 (2006).Sandoval-Torres S., Jomaa W., Marc F., Puiggali J.-R., Forestry Studies in China 12, 167 (2010).Sandoval-Torres S., Jomaa W., Marc F., Puiggali J.-R., Forestry Studies in China 12, 167 (2010).Bekhta P., Niemz P., Holzforschung 57, 539 (2003).Bekhta P., Niemz P., Holzforschung 57, 539 (2003).Esteves B., Marques A., Domingos I., Pereira H., Wood Science and Technology 42, 369 (2008).Esteves B., Marques A., Domingos I., Pereira H., Wood Science and Technology 42, 369 (2008).M¨ott¨onen V., K¨arki T., Drying Technology 26, 1125 (2008).M¨ott¨onen V., K¨arki T., Drying Technology 26, 1125 (2008).Gunduz G., Aydemir D., Korkut S., Drying Technology 28, 249 (2010).Gunduz G., Aydemir D., Korkut S., Drying Technology 28, 249 (2010).Wyszecki G., Stiles W., Color Science: Concepts and Methods, Quantitative Data and Formulas (John Wiley & Sons, Inc, 1967).Wyszecki G., Stiles W., Color Science: Concepts and Methods, Quantitative Data and Formulas (John Wiley & Sons, Inc, 1967).Ma X., Arce G., Yeh P., Gu C., Hobbs P., Weiner A., Prather D., Sharkawy A., Shi S., Murakowski J., et al., Color Science: Concepts and Methods, Quantitative Data and Formulae, 2nd Edition (John Wiley & Sons, Inc, 1982).Ma X., Arce G., Yeh P., Gu C., Hobbs P., Weiner A., Prather D., Sharkawy A., Shi S., Murakowski J., et al., Color Science: Concepts and Methods, Quantitative Data and Formulae, 2nd Edition (John Wiley & Sons, Inc, 1982).Tkalcic M., Tasic J., et al., in Eurocon (2003) pp. 304–308.Tkalcic M., Tasic J., et al., in Eurocon (2003) pp. 304–308.Brischke C., Welzbacher C., Brandt K., Rapp A., Holzforschung 61, 19 (2007).Brischke C., Welzbacher C., Brandt K., Rapp A., Holzforschung 61, 19 (2007).Gonz´alez-Pe˜na M., Hale M., Holzforschung 63, 385 (2009).Gonz´alez-Pe˜na M., Hale M., Holzforschung 63, 385 (2009).Ahajji A., Diouf P., Aloui F., Elbakali I., Perrin D., Merlin A., George B., Wood Science and Technology 43, 69 (2009).Ahajji A., Diouf P., Aloui F., Elbakali I., Perrin D., Merlin A., George B., Wood Science and Technology 43, 69 (2009).Altgen M., Welzbacher C., Humar M., Willems W., Militz H., Holztechnologie 53, 44 (2012).Altgen M., Welzbacher C., Humar M., Willems W., Militz H., Holztechnologie 53, 44 (2012).

The authors declare that there are no conflicts of interest present.