title: Limonene encapsulation in freeze dried gellan systems.
abstract: The encapsulation of limonene in freeze-dried gellan systems was investigated. Surface and encapsulated limonene content was determined by measurement of the absorbance at 252nm. Gellan matrices were both gels and solutions. For a standard gellan concentration (0.5wt%) gelation was induced by potassium or calcium chloride. Furthermore, gellan solutions of varying concentrations (0.25-1wt%) were also studied. Limonene was added at two different concentrations (1 and 2mL/100g sample). Gellan gels encapsulated greater amounts of limonene than solutions. Among all gellan gels, the KCl gels had the greater encapsulated limonene content. However, when the concentration of limonene was doubled in these KCl gels, the encapsulated limonene decreased. The surface limonene content was significant, especially for gellan solutions. The experimental conditions and not the mechanical properties of the matrices were the dominant factor in the interpretation of the observed results.
authors.affiliation: Department of Food Science and Human Nutrition, Agricultural University of Athens, 75 Iera Odos, 11855 Athens, Greece. Electronic address: evageliou@aua.gr.
authors.forename: Vasiliki
authors.initials: V
authors.lastname: Evageliou
authors.affiliation: Department of Food Science and Human Nutrition, Agricultural University of Athens, 75 Iera Odos, 11855 Athens, Greece.
authors.forename: Dimitra
authors.initials: D
authors.lastname: Saliari
mesh_terms: D002626:Chemistry, Pharmaceutical; D053138:Cyclohexenes / Q000032:analysis / Q000138:chemical synthesis*; D016503:Drug Delivery Systems / Q000379:methods; D005612:Freeze Drying / Q000379:methods*; D005782:Gels; D000077222:Limonene; D011135:Polysaccharides, Bacterial / Q000032:analysis / Q000138:chemical synthesis*; D012996:Solutions; D013729:Terpenes / Q000032:analysis / Q000138:chemical synthesis*
chemical_list: D053138:Cyclohexenes; D005782:Gels; D011135:Polysaccharides, Bacterial; D012996:Solutions; D013729:Terpenes; C048288:gellan gum; D000077222:Limonene
keywords: Encapsulation; Freeze drying; Gellan; Limonene