Effects of different drying methods and storage time on free radical scavenging activity and total phenolic content of cosmos caudatus
The present study was conducted to determine the effect of air (AD), oven (OD) and freeze drying (FD) on the free radical scavenging activity and total phenolic content (TPC) of Cosmos caudatus and the effect of storage time by the comparison with a fresh sample (FS). Among the three drying metho...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI
2014
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| Subjects: | |
| Online Access: | http://irep.iium.edu.my/36604/ http://irep.iium.edu.my/36604/ http://irep.iium.edu.my/36604/ http://irep.iium.edu.my/36604/1/pdf.pdf |
| Summary: | The present study was conducted to determine the effect of air (AD), oven (OD)
and freeze drying (FD) on the free radical scavenging activity and total phenolic content
(TPC) of Cosmos caudatus and the effect of storage time by the comparison with a
fresh sample (FS). Among the three drying methods that were used, AD resulted in the
highest free radical scavenging activity against 1,1-diphenyl-2-picrylhydrazyl (DPPH)
(IC50 = 0.0223 mg/mL) and total phenolic content (27.4 g GAE/100 g), whereas OD
produced the lowest scavenging activity and TPC value. After three months of storage,
the dried samples showed a high and consistent free radical scavenging activity when
compared to stored fresh material. The drying methods could preserve the quality of
C. caudatus during storage and the stability of its bioactive components can be maintained. |
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