Evaluation of physicochemical composition and bioactivity of a red seaweed (Pyropia orbicularis) as affected by different drying technologies

Elsa Uribe, Antonio Vega-Gálvez, Vivian García, Alexis Pastén, Katia Rodríguez, Jéssica López, Karina Di Scala

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

The red seaweed Pyropia orbicularis was dried using four different drying methods (freeze-, vacuum-, solar-, and convective-drying) to evaluate the effect of the drying method on physicochemical parameters, phytochemical contents, antioxidant activity, and antimicrobial activity. Freeze- and vacuum-drying resulted in dried samples with the highest total amino acids retention. Solar and convective drying resulted in dried samples with the highest polyunsaturated fatty acids retention. All dried seaweed showed a significant decrease (p <.05) in the pigments content and antioxidant activity when compared with fresh samples. With respect to the antimicrobial activity, the methanolic extracts of seaweeds showed antifungal activity but not antibacterial activity. In general, freeze-drying resulted in dried samples with the best overall quality.

Original languageEnglish
Pages (from-to)1218-1230
Number of pages13
JournalDrying Technology
Volume38
Issue number9
DOIs
StatePublished - 1 Jun 2020
Externally publishedYes

Keywords

  • Drying technologies
  • Pyropia orbicularis
  • amino acids
  • antimicrobial activity
  • bioactive compounds

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