title: Physicochemical properties of hydrothermally treated hemicellulose from oil palm frond.
abstract: Hemicelluloses from oil palm frond (OPF) were extracted using 3 M potassium hydroxide (KOH) for 4 h at 40 degrees C with stirring at 400 rpm to obtain hemicelluloses A and B. The total yield of the hemicellulose isolated from OPF was 33% (dry weight). Both hemicelluloses A and B were then subjected to hydrothermal treatment at 121 degrees C and 1.03 x 10(5) Pa for 10, 30, and 50 min. Physicochemical characterizations of hydrothermally treated hemicelluloses, such as Klason lignin content and reducing sugar content, were performed to study the effect of autohydrolysis processing on OPF-derived hemicelluloses. It was shown that Klason lignin content in hemicellulose A was higher than that in hemicellulose B and decreased after hydrothermal treatment. Hydrothermal treatment enhanced the solubility of hemicelluloses, which reflects their higher reducing sugar content. Monosaccharide analysis using HPLC showed that xylose was the predominant monosaccharide for both hemicelluloses A and B.
authors.affiliation: School of Industrial Technology, Universiti Sains Malaysia, 11800 Minden, Penang, Malaysia. fazilah@usm.my
authors.forename: Ariffin
authors.initials: A
authors.lastname: Fazilah
authors.forename: Mohamed N Mohd
authors.initials: MN
authors.lastname: Azemi
authors.forename: Alias A
authors.initials: AA
authors.lastname: Karim
authors.forename: Mohd N
authors.initials: MN
authors.lastname: Norakma
mesh_terms: D028023:Arecaceae / Q000737:chemistry; D055598:Chemical Phenomena; D006358:Hot Temperature; D007220:Industrial Waste / Q000032:analysis*; D008031:Lignin / Q000032:analysis; D009005:Monosaccharides / Q000032:analysis; D000073878:Palm Oil; D010938:Plant Oils; D011134:Polysaccharides / Q000032:analysis / Q000737:chemistry* / Q000302:isolation & purification; D014867:Water
chemical_list: D007220:Industrial Waste; D009005:Monosaccharides; D010938:Plant Oils; D011134:Polysaccharides; D014867:Water; D000073878:Palm Oil; C007916:hemicellulose; D008031:Lignin