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CAROTENE OXIDIZING FACTORS IN RED PEPPER FRUITS (Capsicum annuum L.): EFFECT OF ASCORBIC ACID AND COPPER IN A β‐CAROTENE‐LINOLEIC ACID SOLID MODEL
Year:
1978
Source of publication :
Journal of Food Science
Authors :
קנר, יוסף
;
.
Volume :
43
Co-Authors:
KANNER, J., Div. of Food Technology, Agricultural Research Organization Volcani Center, P.O. Box 6, Bet Dagan, 50-200, Israel
BUDOWSKI, P., Faculty of Agriculture, Hebrew University of Jerusalem, P.O.B. 12, Rehovot, 76-100, Israel
Facilitators :
From page:
524
To page:
526
(
Total pages:
3
)
Abstract:
The carotene‐bleaching activities of ascorbic acid and copper were investigated in a solid model consisting of carotene and linoleic acid adsorbed on powdered cellulose. The effects depended on the water activity (aw) of the system. Ascorbic acid in the presence of Cu++ had very little activity in the dry model but displayed increasing bleaching effects as the aw value of the system was raised. However this bleaching activity in the moist model reached a maximum as the ascorbic acid concentration rose to about 1 μmol/g cellulose, or 1.4 μmol ascorbic acid/mmol linoleic acid. At higher concentrations of ascorbic acid, the bleaching activity decreased and was eventually converted into an antioxidant effect. A peroxidase‐like protein extracted from pepper was also tested in the present model and found to exhibit prooxidant activity, which was little affected by changes in aw. The antioxidant system composed of copper and ascorbic acid at high concentrations was able to overcome the pro‐oxidant effect of peroxidase. Copyright © 1978, Wiley Blackwell. All rights reserved
Note:
Related Files :
עוד תגיות
תוכן קשור
More details
DOI :
10.1111/j.1365-2621.1978.tb02345.x
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
25781
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:17
Scientific Publication
CAROTENE OXIDIZING FACTORS IN RED PEPPER FRUITS (Capsicum annuum L.): EFFECT OF ASCORBIC ACID AND COPPER IN A β‐CAROTENE‐LINOLEIC ACID SOLID MODEL
43
KANNER, J., Div. of Food Technology, Agricultural Research Organization Volcani Center, P.O. Box 6, Bet Dagan, 50-200, Israel
BUDOWSKI, P., Faculty of Agriculture, Hebrew University of Jerusalem, P.O.B. 12, Rehovot, 76-100, Israel
CAROTENE OXIDIZING FACTORS IN RED PEPPER FRUITS (Capsicum annuum L.): EFFECT OF ASCORBIC ACID AND COPPER IN A β‐CAROTENE‐LINOLEIC ACID SOLID MODEL
The carotene‐bleaching activities of ascorbic acid and copper were investigated in a solid model consisting of carotene and linoleic acid adsorbed on powdered cellulose. The effects depended on the water activity (aw) of the system. Ascorbic acid in the presence of Cu++ had very little activity in the dry model but displayed increasing bleaching effects as the aw value of the system was raised. However this bleaching activity in the moist model reached a maximum as the ascorbic acid concentration rose to about 1 μmol/g cellulose, or 1.4 μmol ascorbic acid/mmol linoleic acid. At higher concentrations of ascorbic acid, the bleaching activity decreased and was eventually converted into an antioxidant effect. A peroxidase‐like protein extracted from pepper was also tested in the present model and found to exhibit prooxidant activity, which was little affected by changes in aw. The antioxidant system composed of copper and ascorbic acid at high concentrations was able to overcome the pro‐oxidant effect of peroxidase. Copyright © 1978, Wiley Blackwell. All rights reserved
Scientific Publication
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