Effect of the height of the stem on the polysaccharide composition ofPinus brutia (Ten) wood and kraft-pulp

Abstract

Compared to cellulose and starch, HCs have limited usage in industry, even though they are abundant. Generally, they are used as an energy resource with lignin, although HCs have only about half of the heating value of lignin i.e. the heating values for lignin and HCs are 27 MJ/ kg and 13.6 MJ/kg, respectively (Yoon and van Heiningen, 2008). HCs that are recovered before the pulping process can be used in various industrial applications. Biorefineries can take a step toward the utilization of HCs in different areas (Vila et al., 2011). HCs can be used as an alternative to petroleum-based polymers. The features of filmforming and biodegradability make xylan and mannan a resource for food packaging. They have low oxygen, grease, and permeability to various aromas, as well as high tensile strength. HCs are used for coating fruit, cheese, and paper. In addition to being edible biosurfactants and food additives, HCs are utilized in hydrogels, contact lenses, and the coatings for controlled-release drugs (Karaaslan et al., 2011; Li et al., 2013; Li et al., 2017). Because of their hydrophilic structures, which have positive effects on their strength properties, they can also be used as additives in the production of paper (Bai et al., 2012; Liu et al., 2015). The extraction of HCs before processing to prevent the Abstract: The first goal of this study was to determine the polysaccharide composition of Pinus brutia wood and how this composition changes during kraft pulping. The second goal was to determine the effect of the stem height on chemical composition. The content of hemicelluloses was about 280 mg/g at a height of 1.3 m, whereas the content was about 300 mg/g at the top of the stem (4.3 m). The main sugars in the wood of P. brutia were mannose (102 mg/g dw), xylose (69 mg/g dw), and glucose (44 mg/g dw). During kraft pulping, 52% of the total hemicelluloses were degraded. Glucose and xylose were more stable than mannose. The total amounts of cellulose in the wood and in the kraft pulp of P. brutia were determined to be 330 mg/g and 661 mg/g, respectively, at 1.3 m.

Effect of altitude on polysaccharide and lignin contents of brutian pine (Pinus brutia Ten.) wood and kraft pulp

“…The remainder of the determined glucose content was attributed to cellulose and used to calculate the cellulose content of each sample. Pekgözlü et al (2020) similarly determined the rhamnose and galacturonic acid contents of Brutian pine samples, which compose the pectin in wood, but rhamnose was not found in the samples in this study.…”