Abstract
Abstract Browning index, degree of browning, total phenolics content and polyphenoloxidase (PPO) activity of three carrot cultivars—Kendo, Ricardo and Stefano—were studied on a simulated market shelf (20 °C) and during cold storage (4 °C). There was a general increase in browning indices and degree of browning during simulated marketing storage for all three cultivars. The three cultivars had similar levels of browning after cold storage but Ricardo reached the highest level after 10 days of simulated shelf life. There appeared to be a rapid increase in total phenolics content during cold storage, which increased further during a simulated marketing trial. The PPO activities of Kendo and Stefano decreased during cold storage whereas that of Ricardo increased, reaching its highest level after 2 months in cold storage. A positive and significant correlation between total phenolics and degree of browning was found for all three cultivars stored for different lengths of time. This research suggests that shorter periods of cold storage reduce the potential for carrot browning and hence prolong the shelf life of carrots. Copyright © 2004 Society of Chemical Industry
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Claims 10
Claim · model-written summary
Browning indices and degree of browning increased during simulated marketing for all three carrot cultivars.
- Taxon
- Carrot
Daucus carotat0 - Material
- all three cultivarse0
- Outcome
- browning indices and degree of browninge0
- Direction
- increasee0
- Setting
- simulated marketing storagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Carrot browning”
e0“There was a general increase in browning indices and degree of browning during simulated marketing storage for all three cultivars.”
Claim · model-written summary
The cultivars had similar browning after cold storage.
- Taxon
- CarrotDaucus carotat0
- Outcome
- levels of browninge0
- Direction
- similare0
- Setting
- cold storagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Carrot browning”
e0“The three cultivars had similar levels of browning after cold storage”
Claim · model-written summary
Ricardo reached the highest browning after 10 days of simulated shelf life.
- Taxon
- CarrotDaucus carotat0
- Material
- Ricardoe0
- Outcome
- highest levele0
- Direction
- higheste0
- Qualifier
- after 10 days of simulated shelf lifee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Carrot browning”
e0“Ricardo reached the highest level after 10 days of simulated shelf life”
Claim · model-written summary
Total phenolics increased rapidly during cold storage.
- Taxon
- CarrotDaucus carotat0
- Outcome
- total phenolics contente0
- Direction
- increasee0
- Setting
- cold storagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Carrot browning”
e0“a rapid increase in total phenolics content during cold storage”
Claim · model-written summary
Total phenolics increased further during simulated marketing.
- Taxon
- CarrotDaucus carotat0
- Outcome
- total phenolics contente0
- Direction
- increased furthere0
- Setting
- simulated marketing triale0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Carrot browning”
e0“total phenolics content during cold storage, which increased further during a simulated marketing trial”
Claim · model-written summary
PPO activity decreased in Kendo during cold storage.
- Taxon
- CarrotDaucus carotat0
- Material
- Kendoe0
- Gene
- PPOe0
- Outcome
- PPO activitiese0
- Direction
- decreasede0
- Setting
- cold storagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Carrot browning”
e0“The PPO activities of Kendo and Stefano decreased during cold storage”
Claim · model-written summary
PPO activity decreased in Stefano during cold storage.
- Taxon
- CarrotDaucus carotat0
- Material
- Stefanoe0
- Gene
- PPOe0
- Outcome
- PPO activitiese0
- Direction
- decreasede0
- Setting
- cold storagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Carrot browning”
e0“The PPO activities of Kendo and Stefano decreased during cold storage”
Claim · model-written summary
PPO activity in Ricardo increased to its highest level after two months of cold storage.
- Taxon
- CarrotDaucus carotat0
- Material
- Ricardoe0
- Outcome
- that of Ricardoe0
- Direction
- increasede0
- Value
- 2 monthse0
- Setting
- cold storagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Carrot browning”
e0“that of Ricardo increased, reaching its highest level after 2 months in cold storage”
Claim · model-written summary
Total phenolics and browning degree were positively correlated across storage durations.
- Taxon
- CarrotDaucus carotat0
- Compound
- total phenolicse0
- Outcome
- degree of browninge0
- Direction
- positivee0
- Qualifier
- different lengths of timee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Carrot browning”
e0“A positive and significant correlation between total phenolics and degree of browning was found for all three cultivars stored for different lengths of time”
Claim · model-written summary
Shorter cold storage is suggested to reduce carrot browning and extend shelf life.
- Taxon
- carrotsDaucus carotae0
- Outcome
- shorter periods of cold storagee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“shorter periods of cold storage reduce the potential for carrot browning and hence prolong the shelf life of carrots”