Journal
SCIENTIA HORTICULTURAE
Volume 128, Issue 2, Pages 78-83Publisher
ELSEVIER
DOI: 10.1016/j.scienta.2011.01.009
Keywords
Antimicrobial activity; Antioxidant capacity; Brassica oleracea L. var. capitata; Brassica rapa L. var. pekinensis Lour.; Cabbage; Phytochemicals
Categories
Funding
- Ministry of Science, Education and Sports of the Republic of Croatia [098-0982913-2829]
- Academy of Sciences of the Czech Republic [KAN 200380801]
- Czech Ministry of Education [MSM 6198959216]
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The accumulation of total phenols (TP. Folin-Ciocalteu method) and total flavonoids (TF, colorimetric assay with AlCl3) and the evolution of antioxidant capacity (FRAP assay, DPPH and ABTS radical scavenging assays) have been monitored in juices of Croatian white cabbage (Brassica oleracea var. capitata) cultivars Varazdinski and Ogulinski, as well as Chinese cabbage (Brassica rapa var. pekinensis), at various developmental stages. Measurements were performed every four weeks, starting from planting to full maturity, throughout the course of eight months. In the first 8-12 weeks, the TP and TF contents as well as antioxidant capacity increased significantly in all analyzed juice samples and in most even doubled. This rapid increase was followed by a gradual decrease in values derived from all assays, over the course of 12-30 weeks, to the final values which were in all cases lower than the values measured at week 4. The results also point to significant variability in TP and IF contents and antioxidant capacity at the fully mature stage between white and Chinese cabbage juices and between juices extracted from cultivars Ogulinski and Varazdinski. (C) 2011 Elsevier B.V. All rights reserved.
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