In this study, the effect of liquid nitrogen on retention of Uludağ Fir wood after exposure to boric acid and borax was determined. Before treating with liquid nitrogen, specimens were conditioned to 4 different moisture contents (oven dry, 12%, 28%, and green). Liquid nitrogen treated specimens for 1 hour, 4 hours and 10 hours. Then, all specimens were conditioned to 12% moisture content (MC). Test specimens were exposed to chemicals such as borax and boric acid for three times: short (2 min), normal (1 hour) and long (1 week). Dipping method was used for the impregnation process. For control, specimens were treated with borax and boric acid without treating with liquid nitrogen. Consequently, there is a linear relationship between moisture content and retention. Since moisture content increases the amount of retention increases as well.
ASTM D 1413-76 1976. Standard Test Method of Testing Wood Preservatives by Laboratory Soilblock Cultures, Annual Book of ASTM Standards, 452-460,
Baysal, E., 1994. Some physical properties of Calabrian pine wood treated with borates and water repellents. M.Sc. Thesis, Karadeniz Technical University, 114 p.
Drysdale, J.A., 1994. Boron treatments for the preservation of wood. A review of efficacy data for fungi and termites. The International Research Group on Wood Preservation. Document IRG/WP, 8 p.
Hafizoglu H, Yalinkiliç MK, Yildiz UC, Baysal E, Demirci Z, Peker H, 1994. Türkiye Bor Kaynaklarinin Odun Koruma (Emprenye), Endüstrisinde Degerlendirme Imkanlari. TÜBITAK Projesi, TOAG-875, Ankara,
M.K. Yalinkilic, E. Baysal, Z. Demirci, 1995a. Effect of boron preservatives on hygroscopicity of Brutia pine wood, J. Eng. Sci., 1 (23) pp. 161 168
M.K. Yalinkilic, M. Takahashi, Y. Imamura, E.D. Gezer, Z. Demirci, R. Ilhan, 1999. Boron addition to non or low formaldehyde cross-linking reagents to enhance biological resistance and dimensional stability for wood, Holz als Roh-und Werkstoff, 57, pp. 351357
Murphy, R.J., 1990. Historical perspective in Europa. In: Margeret Hamel (Ed.), Proceedings of the Uludağ-First International Conference on Wood Protection with Diffusible Preservatives. 2830 November, Nashville, Tennessee, pp. 9 13.
P.Y.S. Chen, M.E. Puttmann, L.H. Williams, D.D. 1997. Stoke, Treatment of hardwood lumber with borate preservation , orest Products Journal, 47, pp. 6368
TS 344, 2012. Ahşap Koruma-Genel Kurallar- Wood preservation-General Rules.
TS 345, 2012. Ahşap emprenye maddeleri etkilerinin deney yöntemleri-Testing methods for the effects of wood impregnating substances.
Wood Handbook-Wood as an Engineering Material. 1999. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory.