We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Capsicum annuum extracts/β-cyclodextrin complexes.
- Authors
Hegheş, Alina; Hădărugă, Nicoleta; Fuliaş, Adriana-Violeta; Bandur, Geza; Hădărugă, Daniel; Dehelean, Cristina-Adriana
- Abstract
In this study, thermal analyses and Karl Fischer titration correlations on the new varieties of Capsicum annuum L. extracts/β-cyclodextrin complexes were performed. Two of seven studied Capsicum varieties containing the highest concentration of capsaicin (0.7 and 1.1 mg g of dry sample) were used for obtaining Capsicum extracts/β-cyclodextrin complexes by co-crystallization method. Thermogravimetric analysis (TG) indicates mass losses with 5-5.7 % lower for the complexes in comparison with β-cyclodextrin, while differential scanning calorimetry analysis (DSC) shows a temperature peak shift to lower values, from 378.2 K (105 °C) for β-cyclodextrin to 355.2-361.2 K (82-88 °C) for complexes. On the other hand, Karl Fischer water titration (KFT) indicates a water concentration of 10.9-11.8 %, with 3.1-4.1 % lower than for β-cyclodextrin (14.9 %). The antioxidant activity of Capsicum extracts/β-cyclodextrin complexes has values comparable with standard antioxidant compound solutions, being significant longer time than the starting extracts. Statistically significant correlations between TG, DSC, and KFT main parameters [TG mass loss up to 423.2 K (150 °C), DSC peak temperature corresponding to water dissociation and KFT water content, and water reaction rate for 'strongly-retained' water molecules partially replaced from the cyclodextrin cavity in the complexation process] were obtained, proving the formation of guest/host ( Capsicum bioactive compounds/β-cyclodextrin) supramolecular systems.
- Subjects
CAPSICUM annuum; PLANT extracts; KARL Fischer technique; CYCLODEXTRINS; CAPSICUM annuum varieties; THERMAL analysis
- Publication
Journal of Thermal Analysis & Calorimetry, 2015, Vol 120, Issue 1, p603
- ISSN
1388-6150
- Publication type
Article
- DOI
10.1007/s10973-014-4229-x