Chemical Composition, Structural Properties, and Bioactivity of Carrageenan from Field-Cultivated Betaphycus gelatinus

This study investigates seasonal biomass variations in Betaphycus gelatinus, a red alga cultivated in the field in Ninh Thuan, Vietnam, along with the chemical composition, structural properties, and bioactivity of its carrageenan. Monthly measurements over a one-year period revealed peak growth (2....

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Bibliographic Details
Published in:Processes 2024-11, Vol.12 (11), p.2610
Main Authors: Huynh, Tran Van, Cao, Hang Thi Thuy, Hieu, Vo Mai Nhu, Tran, Vy Ha Nguyen, Van, Tran Thi Thanh, Nguyen, Thuan Thi, Thuy, Thanh Thi Thu, Trung, Vo Thanh, Thinh, Pham Duc, Trinh, Phan Thi Hoai, Duc, Tran Mai
Format: Article
Language:English
Subjects:
Algae
Antimicrobial agents
Antioxidants
Ascorbic acid
Barium
Betaphycus gelatinus
Bioactive compounds
Biochemistry
Biological activity
Biomass
Carrageenan
Carrageenans
Carrageenin
Chemical composition
Content analysis
Cosmetics
Ethanol
Food
Food preservation
Hydrochloric acid
Listeria monocytogenes
NMR
Nuclear magnetic resonance
Potassium
Reagents
Scavenging
Sulfuric acid
Tranexamic acid
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Summary:This study investigates seasonal biomass variations in Betaphycus gelatinus, a red alga cultivated in the field in Ninh Thuan, Vietnam, along with the chemical composition, structural properties, and bioactivity of its carrageenan. Monthly measurements over a one-year period revealed peak growth (2.02% per day) and carrageenan yield (59.61%) in June, identifying it as the optimal harvest period. FTIR and NMR analyses of carrageenan extracted from field-cultivated B. gelatinus showed hybrid κ- and β-carrageenan forms and a unique pyruvylated β-carrageenan structure not previously reported for this species. Bioactivity assays indicated high antioxidant potential, with a total antioxidant capacity equivalent to 48.30 mg ascorbic acid/g carrageenan and an ABTS radical scavenging IC50 of 3.64 µg/mL. Additionally, antibacterial tests demonstrated strong inhibition of Listeria monocytogenes (12.00 mm inhibition zone). These findings suggest that field cultivation is a sustainable approach for carrageenan production, yielding bioactive compounds with promising applications in pharmaceuticals, cosmetics, and food preservation as a viable alternative to wild harvesting.
ISSN:2227-9717
2227-9717
DOI:10.3390/pr12112610