title: Effect of mineral elements on physicochemical properties of oxidised starches and generation of free radicals.
abstract: The objective of this study was to determine the effect of enrichment of oxidised starches with mineral compounds on their physicochemical properties and capability for free radical generation. Potato and spelt wheat starches were oxidised with sodium hypochlorite and, afterwards, modified with ions of potassium, magnesium and iron. The modified starches were analysed for: content of mineral elements, colour parameters (L*a*b*), water binding capacity solubility in water at temperature of 50 and 80 °C, and susceptibility to enzymatic hydrolysis with α-amylase. In addition, thermodynamic characteristics of gelatinisation was determined by differential scanning calorimetry (DSC), and the number and character of thermally generated free radicals was assayed using electron paramagnetic resonance (EPR). Based on the results achieved, it was concluded that the quantity of incorporated minerals and changes in the assayed physicochemical parameters depended not only on the botanical type of starch but also on the type of the incorporated mineral element.
authors.affiliation: Department of Analysis and Evaluation of Food Quality, University of Agriculture, Balicka 122, 30-149 Krakow, Poland. s.pietrzyk@ur.krakow.pl
authors.forename: Sławomir
authors.initials: S
authors.lastname: Pietrzyk
authors.forename: Teresa
authors.initials: T
authors.lastname: Fortuna
authors.forename: Karolina
authors.initials: K
authors.lastname: Królikowska
authors.forename: Ewelina
authors.initials: E
authors.lastname: Rogozińska
authors.forename: Maria
authors.initials: M
authors.lastname: Labanowska
authors.forename: Magdalena
authors.initials: M
authors.lastname: Kurdziel
mesh_terms: D000818:Animals; D002152:Calorimetry, Differential Scanning; D055598:Chemical Phenomena; D003116:Color; D003300:Copper / Q000032:analysis; D004578:Electron Spin Resonance Spectroscopy; D004602:Elements; D005609:Free Radicals / Q000032:analysis*; D006868:Hydrolysis; D007501:Iron / Q000032:analysis; D008274:Magnesium / Q000032:analysis; D008903:Minerals / Q000032:analysis*; D010084:Oxidation-Reduction; D011188:Potassium / Q000032:analysis; D011198:Solanum tuberosum / Q000737:chemistry; D012995:Solubility; D013213:Starch / Q000737:chemistry*; D034421:Sus scrofa; D013696:Temperature; D014908:Triticum / Q000737:chemistry; D014867:Water / Q000737:chemistry; D000516:alpha-Amylases / Q000378:metabolism
chemical_list: D004602:Elements; D005609:Free Radicals; D008903:Minerals; D014867:Water; D003300:Copper; D013213:Starch; D007501:Iron; D000516:alpha-Amylases; D008274:Magnesium; D011188:Potassium
keywords: Free radicals; Mineral elements; Oxidised starch; Physicochemical properties