title: Food-compatible method for the efficient extraction and stabilization of cranberry pomace polyphenols.
abstract: Cranberry pomace is a byproduct of cranberry processing and is comprised of seeds, skins and stems of the cranberry fruit. While cranberry pomace contains beneficial polyphenols, including proanthocyanidins and anthocyanins, it is not a palatable source of these compounds and is typically discarded. In this study, we have developed and optimized a method to extract polyphenols from cranberry pomace using aqueous ethanol, a food grade solvent. Biochemical characterization of the pomace extract showed the presence of a broad range of polyphenols also present in cranberry juice concentrate. By co-drying cranberry pomace extract with a protein-rich food matrix, such as soy protein isolate (SPI), we have developed a method to produce a cranberry polyphenol-SPI complex (CBP-SPI) containing 10% cranberry polyphenols. Unlike dried cranberry pomace extract alone, proanthocyanidins, anthocyanins and total polyphenols were found to be highly stable at 37 °C in the CBP-SPI powder. The extraction and stabilization of cranberry pomace polyphenols using SPI provides an innovative approach for utilizing pomace in the development of novel food ingredients.
authors.affiliation: Rutgers, The State University of New Jersey, School of Environmental and Biological Sciences, Foran Hall, 59 Dudley Road, New Brunswick, NJ 08901, USA. roopchand@aesop.rutgers.edu
authors.forename: Diana E
authors.initials: DE
authors.lastname: Roopchand
authors.forename: Christian G
authors.initials: CG
authors.lastname: Krueger
authors.forename: Kristin
authors.initials: K
authors.lastname: Moskal
authors.forename: Bertold
authors.initials: B
authors.lastname: Fridlender
authors.forename: Mary Ann
authors.initials: MA
authors.lastname: Lila
authors.forename: Ilya
authors.initials: I
authors.lastname: Raskin
mesh_terms: D005591:Chemical Fractionation / Q000379:methods*; D005638:Fruit / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification*; D059808:Polyphenols / Q000737:chemistry / Q000302:isolation & purification*; D029799:Vaccinium macrocarpon / Q000737:chemistry*; D014866:Waste Products / Q000032:analysis
chemical_list: D010936:Plant Extracts; D059808:Polyphenols; D014866:Waste Products
keywords: ACN; Anthocyanins; CBP-SPI; Cranberry pomace; PAC; Polyphenols; Proanthocyanidins; SPI; Soy protein isolate; anthocyanin; cranberry polyphenol-SPI complex; proanthocyanidin; soy protein isolate