Analysis of quantitative and qualitative extractive components extracted from hornbeam (Carpinus betulus L.) and yakal (Shorea astylosa Foxw.) wood

The aim of the study was analysis of quantitative and qualitative extractive components extracted from hornbeam (Carpinus betulus L.) and yakal (Shorea astylosa Foxw.) wood. Two wood species similar to each other in terms of microscopic structure and physical properties, the native wood of Hornbeam (Carpinus betulus L.) and the yakal wood (Shorea astylosa Foxw.) endemic to the Philippines, which is still little understood, were investigated. Wood is a material composed mainly of polymers called lignocellulose which includes: (cellulose, lignin and hemicelluloses), but also contains many extractive and mineral substances. . The extractive content of wood in temperate climates is approximately for up to 5% by weight of wood. Their identification is difficult because of the wide variety and multiplicity of compounds present. However, extractive compounds are important for the resistance of trees and wood to biological agents such as fungal infestation or insect infestation. Usually the zones of dead wood (heartwood or cored wood) are characterized by a higher content of extractives. The understanding of the chemical composition of extractives in wood can contribute to the development of wood preservative products and environmentally friendly and would be part of the green chemistry policy.