Abstract
In this study, inulin (INU) extracted from burdock root was utilized as a new film base material and combined with chitosan (CHI) to prepare composite films. Oregano and thyme essential oils (OT) were incorporated into the INU-CHI film to confer the films with bioactivities. The physical and optical properties as well as antioxidant and antimicrobial activities of the films were evaluated. INU film alone showed poor physical properties. In contrast, the compatibility of INU and CHI demonstrated by the changes in attenuated total reflectance-Fourier transformation infrared spectrum of the INU-CHI film increased tensile strength and elongation at break of the INU film by 8.2- and 3.9-fold, respectively. In addition, water vapor permeability, water solubility, and moisture content of the films decreased proportionally with increasing OT concentration in the INU-CHI film. Incorporation of OT also increased the opacity of a and b values and decreased the L value of the INU-CHI films. All INU-CHI films containing OT exhibited antioxidant and antimicrobial properties. Particularly, the INU-CHI film with 2.0% OT exhibited the highest 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid), 2,2-diphenyl-1-picrylhydrazyl radical scavenging, and antimicrobial activities against four pathogens. Thus, the INU-CHI film containing OT developed in this study might be utilized as an active packaging material in the food industry.
Highlights
Inulin (INU) is a polysaccharide with a β-D-fructose chain linked by (2 → 1) glycosidic bonds and one terminal α-D-glucopyranose molecule bound to a fructose chain through a (1 ↔ 2) glycosidic linkage
INU extracted from burdock roots has not been studied as an edible packaging material
Means ± S.D. a–f: any means in the same column followed by different letters are significantly (p < 0.05) different by Duncan’s multiple range test
Summary
Inulin (INU) is a polysaccharide with a β-D-fructose chain linked by (2 → 1) glycosidic bonds and one terminal α-D-glucopyranose molecule bound to a fructose chain through a (1 ↔ 2) glycosidic linkage. INU is mainly found in artichoke tubers, chicory, yacon, and burdock roots. Based on the physicochemical characteristics of INU, such as its film-forming capacity, it can be used with other polymers to prepare blend films. INU extracted from burdock roots has not been studied as an edible packaging material. Antimicrobial activities, low oxygen permeability, and good mechanical properties, CHI has been combined with other hydrocolloids such as starch, gelatin, and alginate to produce blended or multi-layered films [7,8,9]. Antimicrobial and/or antioxidant substances have been incorporated into active packaging films [eafi1scl0stmie]v.nsiAOtt[ii1naer0elsti]gm.o[a1inOil1cso]rr.eofeogCbsraisaanertlnvohataeiencasrpdlsor/eolen,oipltrtaih(aOraylanmEtoti)iiooolnalx(,nOidoγdEfa-t)tneehatrdypnsimbidunlebeetshnetfyseaisl,mnmeacnesentseidbashlespaeco-anvciulyetism(abTeleeEoone)ifnela(traihTnereEectio)wrtrahpoarenoeortmtfiamwttaehoiidcnerooimbfnbittooihoasaeltcatmaccionvtoimedvsetmcaocpnoomatnmicoplkyxmoaiuudgonsainnednldgyst fTuaocEsuteinvd[1dite2isie,n1sse3[On]1.tE1iA]a.alCnocdaoilrmsTvfEaboci.rnrCotahlat,ierotvhpnayrcmeorpofoallOr,isaγEta-itoaemnrnpadoijfnoTeerEndceiob,omlarenpcfidoalnpmrev-csnaytcbmrieoncelanOuaeEnsae,drweotfthhhtiyhelememitorhalayinnmhtbaiomsiol aibicscertetoihvnbeeiarcmelopaomonsptrdtoaeaubdnnutdntioosdxafsiondhutoaninwndt sinynOeErgainstdicToEr.aCdadrivtaivceroelfifsecatsmoanjoarnctoimmpicornoebniatlinacOtivEi,twy h[1il4e,1t5h]y.mol is the most abundant in TE [12,13]. IIoonncchhrroommaattooggrraamm ooff iinnuulliin (INNU) extracted from burdock root
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
