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Proximate composition, total phenolic content, and antioxidant activity of seagrape (Caulerpa lentillifera)
- Source :
- Journal of food science. 76(7)
- Publication Year :
- 2011
-
Abstract
- The proximate composition of seagrape (Caulerpa lentillifera) from culture ponds in Penghu, Taiwan was analyzed. The phenolic content and the antioxidant activities including the 1,1-diphenyl-2-picryl-hydrazil (DPPH) radical scavenging activity, ferric ion-reducing activity, hydrogen peroxide scavenging activity, and ferrous ion chelating (FIC) activity of the ethanolic extracts of dry seagrape samples using 2 drying methods of freeze drying and thermal drying were compared with the ethanolic extract of Oolong tea as a reference. The contents (dry weight basis) of carbohydrate, crude protein, crude lipid, crude fiber, and ash of seagrape obtained from culture ponds in Taiwan were 64.00%, 9.26%, 1.57%, 2.97%, and 22.20%, respectively. The total phenolic content (1.30 mg gallic acid equivalent [GAE]/g dry weight) of the ethanolic extract of thermally dried seagrape was significantly lower (P < 0.05) than that (2.04 mg GAE/g dry weight) of freeze-dried seagrape, and both were significantly lower than that (13.58 mg GAE/g dry weight) of Oolong tea. At the same phenolic content, the antioxidant activities of freeze-dried seagrape were significantly higher (P < 0.05) than those of thermally dried seagrape. Compared with Oolong tea, seagrape, irrespective of drying method used, generally had strong hydrogen peroxide scavenging activity; but it was weak in DPPH radical scavenging activity, ferric ion-reducing activity, and FIC activity. The antioxidant activity of seagrape and Oolong tea was significantly influenced by their phenolic contents. Practical Application: The proximate composition, total phenolic content, and antioxidant activity of seagrape (Caulerpa lentillifera) in Taiwan were determined in this research to indicate nutritionally of this edible seaweed to human health, and compared these results to previous studies.
- Subjects :
- Antioxidant
Hot Temperature
DPPH
Food Handling
medicine.medical_treatment
Carbohydrates
Taiwan
Caulerpa lentillifera
Antioxidants
Ferrous
chemistry.chemical_compound
Dry weight
Phenols
medicine
Organic chemistry
Caulerpa
Food science
Gallic acid
Desiccation
biology
Tea
Chemistry
Plant Extracts
Free Radical Scavengers
biology.organism_classification
Edible seaweed
Freeze Drying
Ferric
Oxidation-Reduction
Food Science
medicine.drug
Subjects
Details
- ISSN :
- 17503841
- Volume :
- 76
- Issue :
- 7
- Database :
- OpenAIRE
- Journal :
- Journal of food science
- Accession number :
- edsair.doi.dedup.....dcf9859592c601c8b7d92d7348a3f1dc