Harju, Anni

Pulkka, Susanna

Venäläinen, Martti

Jukuri

Heartwood - valuable natural resource for building When heartwood is used in construc-tions where natural decay resistance suffice, it is possible to avoid unnec-essary use of impregnated timber. The technology under development will contribute to quality control of wood raw material.  Improved seeds for forest regeneration With this new technology, heartwood stilbenes could be measured from the seed producing trees located in seed orchards. Seeds collected from the selected trees would offer forest re-generation material having high po-tential for stilbene production in their heartwood when grown up.   Novel products of forest bioeconomy Bioeconomy is based on the intelli-gent utilization of renewable natural resources. To fulfil the expectations, material-efficient production tech-niques, technologies and services are needed. The technology under devel-opment will contribute to new and improved products in forest-based industries.   Scots pine heartwood Scots pine, Pinus sylvestris L., resists decay due to its phenolic extractives, stilbenes. Among the individual trees there is wide variation in stilbene content. Intelligent exploitation of heartwood requires fast and reliable measurement technology to sort and select heartwood material based on stilbene content.   The higher the stilbene concentration is, the brighter is the blue colour, and the higher is the measured peak of fluorescence. Under UV-light, stilbene-containing wood emits light blue colour, the intensity of which could be measured. Naturally extractive-rich Scots pine heartwood would be suitable for the decks of the bridges or for terraces. The aim of this project is to develop and experiment a fast, cost-effective and reli-able technology to measure the extractive content of Scots pine heartwood. UV-FLUORESCENCE SPECTROSCOPY IN MEASURING STILBENE CONTENT  Anni Harju: anni.harju@luke.fi, Susanna Pulkka: susanna.pulkka@luke.fi, Martti Venäläinen: martti.venalainen@luke.fi Natural Resources Institute Finland, Bio-based Business and Industry, Finlandiantie 18, 58450 Punkaharju  Anni Harju, Susanna Pulkka and Martti Venäläinen Punkaharju Unit Stilbene content ~ 10 mg/g  Stilbene content ~ 15 mg/g  Stilbene content ~ 20 mg/g  Stilbene content ~ 25 mg/g  Collaborators 3K-Factory of Electronics: Elmar Bernhardt, Henri Montonen - Development of technical setup  Mikkeli University of Applied Sciences: Yrjö Hiltunen - Expert on data management Luke: Jukka Antikainen, Tarja Tapanila, Risto Korpinen, Piia Kinnunen - Software development, stilbene extraction and chemical analyses   Project activities Technical setup, running software and procedures to measure phenolic stilbenes from Scots pine heartwood will be developed during the two-year project in 2015-2016.  The measurement procedures will be tested using samples from a forest tree breeding material. At the same time, it is possible to prepare the equipment for wider use.   Funding of the project The research and development activities are mainly funded by the European Regional Development Fund (ERDF), the Region of South Savo. Also Savonlinna Business Services Ltd, Savonlinna City and Luke participate in funding.   Photo:  Eija Matikainen Tarja Salminen Kean-Jin Lim  Martti Venäläinen 

UV-fluorescene spectroscopy in measuring stilbene content

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