Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7584025 | Food Chemistry | 2019 | 37 Pages |
Abstract
The optimal microwave-assisted extraction conditions of pistachio green hull (PGH) pectin (extraction yield of 18.13%) were in microwave power of 700â¯W, irradiation time of 165â¯s, and pH of 1.5. The physico-chemical, structural and functional properties of pectin was examined and the results showed that PGH pectin under optimum conditions was low methoxyl (about 12.1%) with molecular weight of 1.659â¯kg/mol, emulsifying activity of 58.3%, total phenolic content of 18.18â¯mg GalAE/g pectin and good surface activity (46.23 and 49.75â¯mN/m at 0.1 and 0.5%â¯w/v). Also, high performance liquid chromatography analysis illustrated that the pectin is including galacturonic acid (66.0%), arabinose (26.2%), galactose (3.7%), rhamnose (2.7%) and xylose (1.0%). In addition, 1H NMR and FTIR spectrums confirmed the presence of pectin in obtained supenatnt. Surface morphology analysis and X-ray diffraction pattern showed that PGH pectin had a rough surface with crystalline structure.
Keywords
IELTFAGPCHMPGRASArabinoseRELLSRLMPTVSOHCMR1BBDWHCRHAEmulsion activityRhamnogalacturonan-IIRhamnogalacturonan-IRG-IIRG-IPistachio green hullXylPGHnuclear magnetic resonanceAscorbic acidTrifluoroacetic acidGalacturonic acidELVgenerally recognized as safeOptimizationFourier transform infraredStructural analysisMonosaccharide compositionNMREmulsion stabilityARAdegree of esterificationrhamnoseResponse surface methodologyRSMFruBox-Behnken designFT-IRWater holding capacityOil Holding CapacityFructoseGallic acid equivalentAverage molecular weightLiquid to solid ratiohomogalacturonanXRDX-ray diffractionPectinlow methoxyl pectinhigh methoxyl pectinhigh performance liquid chromatographyHPLCGel permeation chromatographyGalGalAGalactoseXyloseGluGlucose
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Milad Kazemi, Faramarz Khodaiyan, Mohsen Labbafi, Seyed Saeid Hosseini, Mohammad Hojjati,