Phytochemicals and Antioxidant Activity Degradation Kinetics During Long-Term Storage of Rapeseed Oil Pressed From Microwave-Treated Seeds

2017 ◽  
Vol 120 (2) ◽  
pp. 1700283 ◽  
Author(s):  
Agnieszka Rękas ◽  
Aleksander Siger ◽  
Małgorzata Wroniak ◽  
Iwona Ścibisz
Keyword(s):  
Antioxidant Activity ◽  
Rapeseed Oil ◽  
Degradation Kinetics ◽  
Long Term Storage ◽  
Term Storage

scholarly journals The influence of processing and long-term storage on the antioxidant metabolism of acerola (Malpighia emarginata) purée

2011 ◽  
Vol 23 (2) ◽  
pp. 151-160 ◽  
Author(s):  
Luciana S. Oliveira ◽  
Maria S. M. Rufino ◽  
Carlos F. H. Moura ◽  
Fabio R. Cavalcanti ◽  
Ricardo E. Alves ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Antioxidant Enzymes ◽  
Antioxidant Potential ◽  
Compensatory Mechanism ◽  
Enzymatic Antioxidants ◽  
Total Antioxidant Activity ◽  
Long Term Storage ◽  
Total Antioxidant ◽  
Term Storage

This study evaluated the effect of the processing and long-term storage on the antioxidant potential and activity of antioxidant enzymes of frozen purées from six acerola clones. Ripe acerolas from clones BRS 235, BRS 236, BRS 237, BRS 238, II47/1 and BRS 152 were harvested; the pulp was processed, packed in sealed polyethylene plastic bags and stored in a domestic freezer at -18°C for 11 months. Samples of each clone were analyzed on harvest/processing day and every 30 days after for bioactive antioxidant compounds, antioxidant enzyme activity and total antioxidant activity. Acerola purées presented a decrease of non-enzyme antioxidants and an increase of antioxidant enzymes activities, indicatives of a compensatory mechanism between enzymatic and non-enzymatic antioxidants. In acerola purée, anthocyanin and polyphenols are strongly correlated to soluble solids content and vitamin C seems a major contributor to total antioxidant activity. Clone II47/1 had an outstanding performance regarding the antioxidant potential of its purée and the best storage period at -18ºC would be 150 days, for all clones studied.

scholarly journals THE EFFECTS OF PREHARVEST ENVIRONMENTAL FACTORS ON ENDOGENOUS ANTIOXIDANTS AND SCALD DEVELOPMENT IN APPLES

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1146f-1146
Author(s):  
Cynthia L. Barden ◽  
W. J. Bramlage
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Apple Trees ◽  
Long Term Storage ◽  
Ethephon Treatment ◽  
Endogenous Antioxidants ◽  
Endogenous Antioxidant ◽  
Term Storage ◽  
Lipid Soluble Antioxidant

Superficial scald development on apples is related to preharvest environmental conditions, perhaps through effects on endogenous antioxidant concentrations In 1989 we examined effects of maturity, light, and preharvest temperatures (< 10°C) on endogenous antioxidant levels in the fruit at harvest and on scald development after long-term storage in 0°C air. Cortland apple trees were sprayed with 500 ppm ethephon 1 month before normal harvest to create maturity differences. Fruit on other Cortland trees were bagged 1 month prior to harvest to reduce light interception. Samples also were harvested from other Cortland trees after exposures to different numbers of hours < 10°C, Hours < 10°C before harvest were negatively correlated to scald development. Ethephon treatment decreased scald incidence, and bagging increased it, The total lipid-soluble antioxidant activity increased with increasing hours < 10°C and with ethephon treatment, while bagging of fruit slightly decreased this antioxidant activity. To better understand the relationships between preharvest factors and antioxidant levels, individual antioxidants, including ascorbic acid, α tocopherol, anthocyanins and glutathione, are being analyzed.

scholarly journals Physicochemical Changes and Antioxidant Activity Prediction Model of Corn/Ginger-Based Extrudates during a Long Term Storage

2015 ◽  
Vol 21 (5) ◽  
pp. 715-725
Author(s):  
Chengkang Huang ◽  
Jian Zhang ◽  
Shaowei Liu ◽  
Xiaozhi Tang ◽  
Yanhua Lu ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Prediction Model ◽  
Activity Prediction ◽  
Physicochemical Changes ◽  
Long Term Storage ◽  
Term Storage

scholarly journals THE EFFECTS OF PREHARVEST ENVIRONMENTAL FACTORS ON ENDOGENOUS ANTIOXIDANTS AND SCALD DEVELOPMENT IN APPLES

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1146F-1146
Author(s):  
Cynthia L. Barden ◽  
W. J. Bramlage
Keyword(s):  
Antioxidant Activity ◽  
Ascorbic Acid ◽  
Apple Trees ◽  
Long Term Storage ◽  
Ethephon Treatment ◽  
Endogenous Antioxidants ◽  
Endogenous Antioxidant ◽  
Term Storage ◽  
Lipid Soluble Antioxidant

Superficial scald development on apples is related to preharvest environmental conditions, perhaps through effects on endogenous antioxidant concentrations In 1989 we examined effects of maturity, light, and preharvest temperatures (< 10°C) on endogenous antioxidant levels in the fruit at harvest and on scald development after long-term storage in 0°C air. Cortland apple trees were sprayed with 500 ppm ethephon 1 month before normal harvest to create maturity differences. Fruit on other Cortland trees were bagged 1 month prior to harvest to reduce light interception. Samples also were harvested from other Cortland trees after exposures to different numbers of hours < 10°C, Hours < 10°C before harvest were negatively correlated to scald development. Ethephon treatment decreased scald incidence, and bagging increased it, The total lipid-soluble antioxidant activity increased with increasing hours < 10°C and with ethephon treatment, while bagging of fruit slightly decreased this antioxidant activity. To better understand the relationships between preharvest factors and antioxidant levels, individual antioxidants, including ascorbic acid, α tocopherol, anthocyanins and glutathione, are being analyzed.

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