title: Extraction of pectins with different degrees of esterification from mulberry branch bark.
abstract: Pectins were extracted from mulberry branch bark, a byproduct of the sericulture industry. A single-factor experiment was used to optimize the production conditions. Under optimal conditions, the galacturonic acid yields from bark with and without epidermis were 61.73 + or - 1.39% and 35.12 + or - 0.24%, respectively. The extracted pectins mainly consisted of galacturonic acid with a trace amount of neutral sugars, and the total galacturonic acid content in the pectins extracted from the bark without epidermis reached 85.46 + or - 2.76%. Pectins extracted from bark without epidermis had a higher degree of esterification (71.13 + or - 1.67%) than those extracted from bark with epidermis (24.27 + or - 2.89%). Pectin solution from bark without epidermis showed higher apparent viscosity, suggesting its higher gelation ability. Thus, the mulberry branch bark is a potential source of pectin with different degrees of esterification.
authors.affiliation: The Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, College of Materials and Textile, Zhejiang Sci-Tech University, Hangzhou 310018, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Liu
authors.forename: Jing
authors.initials: J
authors.lastname: Cao
authors.forename: Jian
authors.initials: J
authors.lastname: Huang
authors.forename: Yurong
authors.initials: Y
authors.lastname: Cai
authors.forename: Juming
authors.initials: J
authors.lastname: Yao
mesh_terms: D000107:Acetylation; D011232:Chemical Precipitation; D002849:Chromatography, Gas; D004951:Esterification; D006603:Hexuronic Acids / Q000032:analysis; D031625:Morus / Q000737:chemistry*; D010368:Pectins / Q000737:chemistry* / Q000302:isolation & purification*; D024301:Plant Bark / Q000737:chemistry*; D019441:Plant Epidermis / Q000737:chemistry; D012212:Rheology; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D013314:Stress, Mechanical; D014783:Viscosity
chemical_list: D006603:Hexuronic Acids; D012996:Solutions; C007819:galacturonic acid; D010368:Pectins