title: Effect of high voltage atmospheric cold plasma on white grape juice quality.
abstract: BACKGROUND
  This study focuses on the effects of novel, non-thermal high voltage atmospheric cold plasma (HVACP) processing on the quality of grape juice. A quality-based comparison of cold plasma treatment with thermal pasteurization treatment of white grape juice was done.
  
  
  RESULTS
  HVACP treatment of grape juice at 80 kV for 4 min resulted in a 7.4 log10CFU mL-1reduction in Saccharomyces cerevisiae without any significant (P > 0.05) change in pH, acidity and electrical conductivity of the juice. An increase in non-enzymatic browning was observed, but total color difference was very low and within acceptable limits. Spectrophotometric measurements showed a decrease in total phenolics, total flavonoids, DPPH free radical scavenging and antioxidant capacity, but they were found to be comparable to those resulting from thermal pasteurization. An increase in total flavonols was observed after HVACP treatments.
  
  
  CONCLUSIONS
  HVACP treatment of white grape juice at 80 kV for 2 min was found to be comparable to thermal pasteurization in all analyzed quality attributes. HVACP has shown the potential to be used as an alternative to thermal treatment of white grape juice. © 2017 Society of Chemical Industry.
authors.affiliation: Center for Crop Utilization Research, Iowa State University, Ames, IA, USA.
authors.forename: Shashi Kishor
authors.initials: SK
authors.lastname: Pankaj
authors.affiliation: Center for Crop Utilization Research, Iowa State University, Ames, IA, USA.
authors.forename: Zifan
authors.initials: Z
authors.lastname: Wan
authors.affiliation: Center for Crop Utilization Research, Iowa State University, Ames, IA, USA.
authors.forename: William
authors.initials: W
authors.lastname: Colonna
authors.affiliation: Center for Crop Utilization Research, Iowa State University, Ames, IA, USA.
authors.forename: Kevin M
authors.initials: KM
authors.lastname: Keener
mesh_terms: D000975:Antioxidants / Q000032:analysis; D005419:Flavonoids / Q000032:analysis; D044948:Flavonols / Q000032:analysis; D005511:Food Handling / Q000295:instrumentation / Q000379:methods*; D005638:Fruit / Q000737:chemistry* / Q000187:drug effects; D000067030:Fruit and Vegetable Juices / Q000032:analysis*; D061352:Pasteurization; D058626:Plasma Gases / Q000494:pharmacology*; D027843:Vitis / Q000737:chemistry* / Q000187:drug effects
chemical_list: D000975:Antioxidants; D005419:Flavonoids; D044948:Flavonols; D058626:Plasma Gases
keywords: HVACP; cold plasma; grape juice; juice quality