Environmental friendly alkaline sulfite anthraquinone-methonal (ASAM) pulping with Rumex crispus plant extract of woody materials.

ASAM with Rumex crispus extract organosolv pulping was developed by using 1,5-dihydroxy-3-methoxy-7-methyl-anthraquinone from Rumex crispus root, instead of anthraquinone. ASAM was also produced as a control pulping. Both pulps were made by handsheets from fast growing P.deltoides clone (Samsun p.clone), Robinia pseudoacacia L. and Pinus pinaster grown in Turkey for wood fibrous raw materials. The mechanical consisting tensile, bursting and tear values and optical values of ASAM handsheets yellowness, brightness and whiteness were compared to ASAM with Rumex crispus L. extracted. It is concluded that ASAM with Rumex crispus extract pulping suits well in the manufacturing of special papers.

Chemical components of heartwood and sapwood of common Yew (Taxus baccata L.).

Cell-wall components and solubility characteristics of the heartwood and sapwood of Taxus baccata L. were determined by methods of wood analysis and the differences between heartwood and sapwood were established. When we observe the data obtained, it is seen that the amount of extractive material found in the heartwood is substantially higher than the sapwood. The extractive material in Taxus baccata L. is originated from the hidden epithelial cells surrounded by resin canals.