Studies on the functional properties of protein concentrate of Kappaphycus alvarezii (Doty) Doty - an edible seaweed.
Protein concentrate (PC) of Kappaphycus alvarezii (cultivated on the West coast of India), was extracted and its functional properties were evaluated. The K. alvarezii PC contained 62.3 ± 1.62% proteins. At pH 12, the nitrogen solubility of this PC was 58.72 ± 1.68% in the presence of 0.5M NaCl. The emulsifying and foaming properties of this PC varied with time and pH. However, it formed remarkably stable emulsions with Jatropha oil after 720 min (i.e. E720=53.67 ± 1.59). On the other hand, maximum foaming ability (53.33 ± 2.31%) of the PC was recorded at pH 4.0. This PC had high oil (1.29 ± 0.20 ml oil/g PC) and water absorption capacity (2.22 0.04 ml H2O/g PC). DSC analysis revealed thermal transitions at about 109.25°C at neutral pH. The results obtained in this investigation suggest the suitability of K. alvarezii PC as an inexpensive source of protein; thus this PC could be incorporated into several value-added food products.
Marine Biotechnology and Ecology Discipline, Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial Research, CSIR, Bhavnagar 364 002, India. Electronic address: ksuresh2779@gmail.com.
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Suresh Kumar
Marine Biotechnology and Ecology Discipline, Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial Research, CSIR, Bhavnagar 364 002, India.
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Ganesan
State Key Laboratory of Marine Environmental Science (MEL), College of Ocean and Earth Sciences (COES), Xiang'an Campus of Xiamen University, Xiamen, 361102, China.
Kandasamy
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Selvaraj
Marine Biotechnology and Ecology Discipline, Central Salt and Marine Chemicals Research Institute, Council of Scientific and Industrial Research, CSIR, Bhavnagar 364 002, India.
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Subba Rao
D010940:Plant Proteins / Q000737:chemistry*; D010945:Plants, Edible / Q000737:chemistry; D055550:Protein Stability; D000461:Rhodophyta / Q000737:chemistry*; D012624:Seaweed / Q000737:chemistry*; D012995:Solubility; D014675:Vegetables / Q000737:chemistry*
D010940:Plant Proteins
DSC; Emulsifying and foaming properties; FT-IR spectroscopy; Kappaphycus alvarezii; Nitrogen solubility; Protein concentrate