No abstract

Black pine (Pinus nigra) is a significant raw material source for the forest products industry in Turkey. The purpose of this research was to study some chemical, anatomical, physical, and mechanical properties of wood obtained from juvenile black pines planted in Kavaklıdere -Muğla, originating from five different locations: Muğla, Balıkesir, Denizli, Bursa, and Kütahya. Although pines originating from Muğla and Balıkesir were good in terms of wood properties, those from Denizli, Bursa, and Kütahya exhibited no remarkable features. Black pine of Muğla origin was recommended for planting in Kavaklıdere and similar habitats, whereas pines of Denizli, Bursa, and Kütahya origins were not recommended. However, pine of Balıkesir origin may be an alternative to that of Muğla origin for black pine plantations at Kavaklıdere and similar sites.

No abstract

The Calabrian pine (Pinus brutia Ten.) and Monterey pine (Pinus radiata D. Don.) species were pulped using an alternative Sodium borohydride (NaBH 4 )-Kraft pulping process with the aim of improving delignification and total yield. The effects of reaction conditions on the pulp yield and degree of delignification were evaluated.The results indicate that adding sodium borohydride to conventional kraft process was effective for improving both delignification and yield of both pine species. It was found that the delignification proceeded more rapidly and more selectively with NaBH 4 -kraft than it did with conventional kraft alone, giving higher yields at a given kappa number. However, the best Sodium borohydride NaBH 4 -Kraft pulping condition for the Calabrian pine was found with 16% Active Alkali, 28% Sulfidity and 0.5% NaBH 4 level whereas the best pulping conditions for Monterey pine was found with 20% Active Alkali, 26% Sulfidity and 0.7% NaBH 4 level.