This study was conducted to investigate the influence of different drying treatments on antioxidant (AO) activity and phenolic content of raspberry (Rubus idaeus), cultivar Willamette. Whole raspberry fruits were dried convectively (air-drying), osmotically, and freeze-dried. Acetone-water extracts of fresh and dried raspberries were assessed for total phenolic content by standard Folin-Ciocalteau method. Two AO assays were applied, a recently developed direct current (DC) polarographic assay based on decrease of anodic oxidation current of hydrogen peroxide and widely used radical scavenge against the 1,1-diphenyl-2-picrylhydrazyl (DPPH). Strong correlation has been obtained between both AO assays and total phenolic content. In addition, some individual phenolic compounds present in raspberry have been assessed using DPPH and DC polarographic assay. Comparison and evaluation of drying methods has been based on preservation of AO activity and total phenolic content. Obtained results co...nfirmed superiority of freeze-drying; convective drying caused slight changes while osmotic dehydration showed a significant decrease of phenolic compounds and AO activity. Practical Application Optimization of drying process could be based on surveying of AO activity.
TY - JOUR
AU - Novaković, Miroslav M.
AU - Stevanović, Snežana
AU - Gorjanović, Stanislava
AU - Jovanović, Predrag M.
AU - Tešević, Vele
AU - Janković, Miodrag
AU - Suznjević, Desanka Z.
PY - 2011
UR - http://aspace.agrif.bg.ac.rs/handle/123456789/2732
AB - This study was conducted to investigate the influence of different drying treatments on antioxidant (AO) activity and phenolic content of raspberry (Rubus idaeus), cultivar Willamette. Whole raspberry fruits were dried convectively (air-drying), osmotically, and freeze-dried. Acetone-water extracts of fresh and dried raspberries were assessed for total phenolic content by standard Folin-Ciocalteau method. Two AO assays were applied, a recently developed direct current (DC) polarographic assay based on decrease of anodic oxidation current of hydrogen peroxide and widely used radical scavenge against the 1,1-diphenyl-2-picrylhydrazyl (DPPH). Strong correlation has been obtained between both AO assays and total phenolic content. In addition, some individual phenolic compounds present in raspberry have been assessed using DPPH and DC polarographic assay. Comparison and evaluation of drying methods has been based on preservation of AO activity and total phenolic content. Obtained results confirmed superiority of freeze-drying; convective drying caused slight changes while osmotic dehydration showed a significant decrease of phenolic compounds and AO activity. Practical Application Optimization of drying process could be based on surveying of AO activity.
PB - Wiley, Hoboken
T2 - Journal of Food Science
T1 - Changes of Hydrogen Peroxide and Radical-Scavenging Activity of Raspberry during Osmotic, Convective, and Freeze-Drying
EP - C668
IS - 4
SP - C663
VL - 76
DO - 10.1111/j.1750-3841.2011.02144.x
ER -
@article{
author = "Novaković, Miroslav M. and Stevanović, Snežana and Gorjanović, Stanislava and Jovanović, Predrag M. and Tešević, Vele and Janković, Miodrag and Suznjević, Desanka Z.",
year = "2011",
abstract = "This study was conducted to investigate the influence of different drying treatments on antioxidant (AO) activity and phenolic content of raspberry (Rubus idaeus), cultivar Willamette. Whole raspberry fruits were dried convectively (air-drying), osmotically, and freeze-dried. Acetone-water extracts of fresh and dried raspberries were assessed for total phenolic content by standard Folin-Ciocalteau method. Two AO assays were applied, a recently developed direct current (DC) polarographic assay based on decrease of anodic oxidation current of hydrogen peroxide and widely used radical scavenge against the 1,1-diphenyl-2-picrylhydrazyl (DPPH). Strong correlation has been obtained between both AO assays and total phenolic content. In addition, some individual phenolic compounds present in raspberry have been assessed using DPPH and DC polarographic assay. Comparison and evaluation of drying methods has been based on preservation of AO activity and total phenolic content. Obtained results confirmed superiority of freeze-drying; convective drying caused slight changes while osmotic dehydration showed a significant decrease of phenolic compounds and AO activity. Practical Application Optimization of drying process could be based on surveying of AO activity.",
publisher = "Wiley, Hoboken",
journal = "Journal of Food Science",
title = "Changes of Hydrogen Peroxide and Radical-Scavenging Activity of Raspberry during Osmotic, Convective, and Freeze-Drying",
pages = "C668-C663",
number = "4",
volume = "76",
doi = "10.1111/j.1750-3841.2011.02144.x"
}
Novaković, M. M., Stevanović, S., Gorjanović, S., Jovanović, P. M., Tešević, V., Janković, M.,& Suznjević, D. Z.. (2011). Changes of Hydrogen Peroxide and Radical-Scavenging Activity of Raspberry during Osmotic, Convective, and Freeze-Drying. in Journal of Food Science
Wiley, Hoboken., 76(4), C663-C668.
https://doi.org/10.1111/j.1750-3841.2011.02144.x
Novaković MM, Stevanović S, Gorjanović S, Jovanović PM, Tešević V, Janković M, Suznjević DZ. Changes of Hydrogen Peroxide and Radical-Scavenging Activity of Raspberry during Osmotic, Convective, and Freeze-Drying. in Journal of Food Science. 2011;76(4):C663-C668.
doi:10.1111/j.1750-3841.2011.02144.x .
Novaković, Miroslav M., Stevanović, Snežana, Gorjanović, Stanislava, Jovanović, Predrag M., Tešević, Vele, Janković, Miodrag, Suznjević, Desanka Z., "Changes of Hydrogen Peroxide and Radical-Scavenging Activity of Raspberry during Osmotic, Convective, and Freeze-Drying" in Journal of Food Science, 76, no. 4 (2011):C663-C668,
https://doi.org/10.1111/j.1750-3841.2011.02144.x . .
