Carrageenan of Red Algae Eucheuma gelatinae : Extraction, Antioxidant Activity, Rheology Characteristics, and Physicochemistry Characterization

• Published in: Molecules (Basel, Switzerland) Vol. 27; no. 4; p. 1268
• Main Authors: Ha, Hoang Thai, Cuong, Dang Xuan, Thuy, Le Huong, Thuan, Pham Thanh, Tuyen, Dang Thi Thanh, Mo, Vu Thi, Dong, Dinh Huu
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 14.02.2022; MDPI
• Subjects: Algae; Algorithms; antioxidant activity; Antioxidants; Antioxidants - chemistry; Antioxidants - isolation & purification; Antioxidants - pharmacology; Ascorbic acid; Box-Behken; Carrageenan; Carrageenan - chemistry; Carrageenan - isolation & purification; Carrageenan - pharmacology; Carrageenans; Chemical Fractionation - methods; Chemical Phenomena; Crystal structure; Eucheuma; Eucheuma gelatinae; Evaluation; extraction; Functional foods & nutraceuticals; Hydrogen-Ion Concentration; Mannose; Models, Chemical; Molecular weight; Optimization; Pharmaceuticals; physic-chemistry; Physicochemical properties; Polysaccharides; Rhamnose; Rheological properties; Rheology; Rhodophyta - chemistry; Seaweeds; Solvents; Viscosity; β-carrageenan; Vietnam; Box-Behken; rheology; Eucheuma gelatinae; β-carrageenan; extraction; physic-chemistry; antioxidant activity
• ISSN: 1420-3049; 1420-3049
• DOI: 10.3390/molecules27041268

Carrageenan is an anionic sulfated polysaccharide that accounts for a high content of red seaweed . This paper focused on the extraction, optimization, and evaluation of antioxidant activity, rheology characteristics, and physic-chemistry characterization of β-carrageenan from . The extraction and the optimization of β-carrageenan were by the maceration-stirred method and the experimental model of Box-Behken. Antioxidant activity was evaluated to be the total antioxidant activity and reducing power activity. The rheology characteristics of carrageenan were measured to be gel strength and viscosity. Physic-chemistry characterization was determined, including the molecular weight, sugar composition, function groups, and crystal structure, through GCP, GC-FID, FTIR, and XRD. The results showed that carrageenan possessed antioxidant activity, had intrinsic viscosity and gel strength, corresponding to 263.02 cps and 487.5 g/cm , respectively. Antioxidant carrageenan is composed of rhamnose, mannose, glucose, fucose, and xylose, with two molecular weight fractions of 2.635 × 10 and 2.58 × 10 g/mol, respectively. Antioxidant carrageenan did not exist in the crystal. The optimization condition of antioxidant carrageenan extraction was done at 82.35 °C for 115.35 min with a solvent-to-algae ratio of 36.42 ( / ). At the optimization condition, the extraction efficiency of carrageenan was predicted to be 87.56 ± 5.61 (%), the total antioxidant activity and reducing power activity were predicted to 71.95 ± 5.32 (mg ascorbic acid equivalent/g DW) and 89.84 ± 5.84 (mg FeSO equivalent/g DW), respectively. Purity carrageenan content got the highest value at 42.68 ± 2.37 (%, DW). Antioxidant carrageenan from is of potential use in food and pharmaceuticals.