title: Extractable and Non-Extractable Phenolics and Antioxidant Capacity of Mandarin Waste Dried at Different Temperatures.
abstract: The mandarin industry is generating more waste due to the increasing demand for juice. In this study, extractable and non-extractable phenolics as well as 2,2-diphenyl-1-picrylhydrazyl (DPPH), 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS), ferric reducing ability of plasma (FRAP), and oxygen radical absorbance capacity (ORAC) antioxidant activities in Satsuma mandarin waste dried at different temperatures were determined. The amounts of non-extractable total phenols, total flavonoids, and condensed tannins measured in mandarin waste dried at 120 °C were 39.4, 44.3, and 45.6 %, respectively, which were higher than those of fresh-mandarin waste. Dried mandarin waste is rich in extractable and non-extractable hesperidin (259.86 and 182.52 mg/g, respectively) and eriocitrin (85.12 and 197.24 mg/g, respectively), as well as non-extractable gallic acid (36.08 μg/g). The antioxidant capacities of extractable and non-extractable phenolics, from the highest to the lowest, were ABTS > ORAC > DPPH > FRAP and ORAC > ABTS > DPPH > FRAP, respectively. The information reported here may encourage mandarin industry operators to re-evaluate their by-products, extending the application of mandarin fruits and reducing waste.
authors.affiliation: Posgrado de Ingeniería Bioquímica, Tecnológico de Celaya, Antonio García Cubas Pte. No. 600 esq. Av. Tecnológico, C.P. 38010, Celaya, Guanajuato, México.
authors.forename: Francisco J
authors.initials: FJ
authors.lastname: Esparza-Martínez
authors.affiliation: Posgrado de Ingeniería Bioquímica, Tecnológico de Celaya, Antonio García Cubas Pte. No. 600 esq. Av. Tecnológico, C.P. 38010, Celaya, Guanajuato, México.
authors.forename: Rita
authors.initials: R
authors.lastname: Miranda-López
authors.affiliation: Chemical Department, Brigham Young University, C100 BNSN, Provo, UT, 84602, USA.
authors.forename: Sara M
authors.initials: SM
authors.lastname: Mata-Sánchez
authors.affiliation: Laboratorio de Alimentos, Campo Experimental Bajío (INIFAP), Km. 6.5 Carretera Celaya-San Miguel de Allende, C. P. 38110, Celaya, Guanajuato, México. shoraciogm@gmail.com.
authors.forename: Salvador H
authors.initials: SH
authors.lastname: Guzmán-Maldonado
mesh_terms: D000975:Antioxidants / Q000032:analysis*; D052160:Benzothiazoles / Q000032:analysis; D001713:Biphenyl Compounds / Q000032:analysis; D002957:Citrus / Q000737:chemistry*; D003890:Desiccation; D004043:Dietary Fiber / Q000032:analysis; D044950:Flavanones / Q000032:analysis; D005511:Food Handling; D005638:Fruit / Q000737:chemistry*; D005707:Gallic Acid / Q000032:analysis; D062385:Hydroxybenzoates / Q000032:analysis; D000072257:Oxygen Radical Absorbance Capacity; D010851:Picrates / Q000032:analysis; D010936:Plant Extracts / Q000032:analysis; D059808:Polyphenols / Q000032:analysis*; D044945:Proanthocyanidins / Q000032:analysis; D013451:Sulfonic Acids / Q000032:analysis; D013696:Temperature
chemical_list: D000975:Antioxidants; D052160:Benzothiazoles; D001713:Biphenyl Compounds; D004043:Dietary Fiber; D044950:Flavanones; D062385:Hydroxybenzoates; D010851:Picrates; D010936:Plant Extracts; D059808:Polyphenols; D044945:Proanthocyanidins; D013451:Sulfonic Acids; C002502:2,2'-azino-di-(3-ethylbenzothiazoline)-6-sulfonic acid; D005707:Gallic Acid; C004931:1,1-diphenyl-2-picrylhydrazyl; C017616:phenolic acid
keywords: Antioxidant capacity; Drying temperature; Mandarin waste; Phenolics