title: Extraction and characterization of Foeniculum vulgare pectins and their use for preparing biopolymer films in the presence of phaseolin protein.
abstract: Pectins from Foeniculum vulgare were extracted under acidic conditions. The obtained pectins were mainly composed of uronic acid but also contained traces of rhamnose, galactose, and arabinose. Extracted pectins were used as a carbohydrate source to prepare biopolymer films in the absence and in the presence of phaseolin protein. The swelling characteristics of the films were examined as a function of ionic strength, pH, and the applied osmotic stress. The swelling behavior was dominated by a Donnan-type effect, which decreases with increasing ionic strength and counterion valency. In all cases the swelling of films containing phaseolin was reduced, suggesting a network formation between protein and pectins. Mechanical property studies have also estimated the validity of the obtained novel biopolymer films in terms of mechanical resistance.
authors.affiliation: Department of Food Science, University of Naples Federico II, Parco Gussone, 80055 Portici, Naples, Italy.
authors.forename: Concetta V L
authors.initials: CV
authors.lastname: Giosafatto
authors.forename: Loredana
authors.initials: L
authors.lastname: Mariniello
authors.forename: Steve
authors.initials: S
authors.lastname: Ring
mesh_terms: D001704:Biopolymers / Q000737:chemistry*; D055598:Chemical Phenomena; D002627:Chemistry, Physical; D016503:Drug Delivery Systems / Q000295:instrumentation; D030001:Foeniculum / Q000737:chemistry*; D018857:Food Packaging / Q000295:instrumentation; D010368:Pectins / Q000737:chemistry* / Q000302:isolation & purification*; D010940:Plant Proteins / Q000494:pharmacology*; D018517:Plant Roots / Q000737:chemistry
chemical_list: D001704:Biopolymers; D010940:Plant Proteins; C048826:phaseolin protein, Phaseolus vulgaris; D010368:Pectins