The Chemical Components in Wood and Bark of Turkish Hazel (Corylus colurna L.)

Abstract

Turkish hazel (Corylus colurna L.), an endemic species unique to Turkey and wood, bark, and especially fruits are used. In this study, some chemical properties and solubilities of Turkish hazel (Corylus colurna L.) wood and bark were determined. Samples were obtained from the forests of central Black Sea Region (Kastamonu, Pınarbaşı, Kurtgirmez location) in Turkey, Main chemical components of Turkish hazel (Corylus colurna L.) wood and bark’s; holocellulose, alpha cellulose, lignin and ash content, ratios (%) were determined, In addition, solubility of the outer and inner bark and wood flour in alcohol-benzene, hot water, cold water, 1% NaOH and and in percentages were found. The results of chemical analysis showed that percentages of holocellulose, alpha cellulose, lignin, ash content, solubility of wood flour in alcohol-benzene, hot water, cold water and 1% NaOH were 68.8%, 43.5%, 23.6%,  0.3%, 7.42%, 7.40%, 6.30% ve 28.5%  respectively. The chemical contents of the outer and inner bark were determined to be as follows: holocellulose 53.4-55.6%, alpha cellulose 31.33-39.5%, lignin 36.04-27.1% and ash content 5.80-6.68%. Also, alcohol-benzene, hot water, cold water and 1% NaOH solubilities of the outer bark were found 9.85-7.65%, 9.50-14.02%, 6.05-11.04 %  and 39.50-31.68%, respectively.

Keywords: Corylus colurna L., Turkish hazel, holocellulose, alpha cellulose, lignin, ash