title: Functional characterization of the gels prepared with pectin methylesterase (PME)-treated pectins.
abstract: High- and low-methoxyl pectins were treated with pectin methylesterase (PME) and the functional properties of the resulting pectin gels were characterized. The degree of esterification of high- and low-methoxyl pectins decreased from 74.5% to 6.3% and 40.0% to 6.5%, respectively while not changing their molecular weight. Also, the addition of glucono-delta-lactone (GDL) dramatically affected the gel strength and the pH reduction by the GDL led to the increased syneresis of the pectin gels, which was also observed in the PME-treated samples. When flavor compounds were incorporated into the pectin gels, the flavor release from the gels increased with decreasing the degree of esterification due to increased hydrophilic properties.
authors.affiliation: Department of Food Science & Technology and Carbohydrate Bioproduct Research Center, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, Republic of Korea.
authors.forename: Young-Hee
authors.initials: YH
authors.lastname: Yoo
authors.forename: Suyong
authors.initials: S
authors.lastname: Lee
authors.forename: Yang
authors.initials: Y
authors.lastname: Kim
authors.forename: Kwang-Ok
authors.initials: KO
authors.lastname: Kim
authors.forename: Young-Suk
authors.initials: YS
authors.lastname: Kim
authors.forename: Sang-Ho
authors.initials: SH
authors.lastname: Yoo
mesh_terms: D002265:Carboxylic Ester Hydrolases / Q000378:metabolism*; D004951:Esterification / Q000187:drug effects; D005421:Flavoring Agents / Q000378:metabolism; D005782:Gels / Q000378:metabolism*; D005942:Gluconates / Q000494:pharmacology; D006244:Hardness / Q000187:drug effects; D006863:Hydrogen-Ion Concentration / Q000187:drug effects; D007783:Lactones; D008970:Molecular Weight; D010368:Pectins / Q000378:metabolism*; D012996:Solutions
chemical_list: D005421:Flavoring Agents; D005782:Gels; D005942:Gluconates; D007783:Lactones; D012996:Solutions; D010368:Pectins; D002265:Carboxylic Ester Hydrolases; C022323:pectinesterase; C010730:beta-glucono-1,5-lactone