TY - JOUR
T1 - Cyclodextrins enhance the antioxidant activity of essential oils from three lamiaceae species
AU - Costa, Patrícia
AU - Medronho, Bruno
AU - Gonçalves, Sandra
AU - Romano, Anabela
N1 - Funding Information:
The authors acknowledge support from the Portuguese Foundation for Science and Technology (FCT, project PTDC/AGR-TEC/4049/2012, post-doc grants assigned to Patrícia Costa: SFRH/BPD/93108/2013, Bruno Medronho: SFRH/BPD/74540/2010 and Sandra Gonçalves: SFRH/BPD/84112/2012).
Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/8/1
Y1 - 2015/8/1
N2 - In the present study, the effect of β-cyclodextrin (β-CD) and 2-hydroxypropyl-β-cyclodextrin (HP-β-CD) on the antioxidant activity and storage stability of the essential oils (EOs) from Lavandula viridis, Lavandula pedunculata subsp. lusitanica and Thymus lotocephalus (Lamiaceae) was investigated. The presence of both cyclodextrins (CDs) was found to produce a remarkable enhancement on the antioxidant activity as assessed by the oxygen radical absorbance capacity (ORAC) assay. The highest free radical-scavenging effect was observed in the EO from T. lotocephalus, particularly at the highest concentration of HP-β-CD (i.e., 1900μmolTE/gEO). Moreover, the antioxidant activity of the EO/HP-β-CD complexes was found to be considerably stable over 30 days, at 4°C, possibly due to the higher solubility of the modified β-CD. The results obtained suggest that these systems can be a very interesting alternative as a natural source of antioxidants for different applications such as in the food preservation field.
AB - In the present study, the effect of β-cyclodextrin (β-CD) and 2-hydroxypropyl-β-cyclodextrin (HP-β-CD) on the antioxidant activity and storage stability of the essential oils (EOs) from Lavandula viridis, Lavandula pedunculata subsp. lusitanica and Thymus lotocephalus (Lamiaceae) was investigated. The presence of both cyclodextrins (CDs) was found to produce a remarkable enhancement on the antioxidant activity as assessed by the oxygen radical absorbance capacity (ORAC) assay. The highest free radical-scavenging effect was observed in the EO from T. lotocephalus, particularly at the highest concentration of HP-β-CD (i.e., 1900μmolTE/gEO). Moreover, the antioxidant activity of the EO/HP-β-CD complexes was found to be considerably stable over 30 days, at 4°C, possibly due to the higher solubility of the modified β-CD. The results obtained suggest that these systems can be a very interesting alternative as a natural source of antioxidants for different applications such as in the food preservation field.
KW - Antioxidant activity
KW - Cyclodextrins
KW - Essential oils
KW - Lavandula pedunculata
KW - Lavandula viridis
KW - Thymus lotocephalus
UR - http://www.scopus.com/inward/record.url?scp=84925813589&partnerID=8YFLogxK
U2 - 10.1016/j.indcrop.2015.03.065
DO - 10.1016/j.indcrop.2015.03.065
M3 - Article
AN - SCOPUS:84925813589
SN - 0926-6690
VL - 70
SP - 341
EP - 346
JO - Industrial Crops and Products
JF - Industrial Crops and Products
ER -
