title: Production of monosaccharides and bio-active compounds derived from marine polysaccharides using subcritical water hydrolysis.
abstract: Polysaccharides are the major components of brown seaweed, accounting for approximately 40-65% of the total mass. The majority of the brown seaweed polysaccharides consists of alginate (40% of dry matter), a linear hetero-polysaccharides commonly developed in fields. However, depolymerisation of alginate is required to recover high-value compounds. In this report, depolymerisation was performed using subcritical water hydrolysis (SWH) at 180-260°C, with a ratio of material to water of 1:25 (w/v) and 1% formic acid as a catalyst. Sugar recovery was higher at low temperatures in the presence of catalyst. The antioxidant properties of Saccharina japonica showed the best activity at 180°C in the presence of a catalyst. The mass spectra produced using MALDI-TOF showed that polysaccharides and oligosaccharides were produced during hydrothermal treatment. Hydrolysis treatment at 180°C in the presence of a catalyst may be useful for modifying the structure of S. japonica and purified alginate.
authors.affiliation: Department of Food Science and Technology, Pukyong National University, 608-737, 45 Yongso-ro, Nam-gu, Busan, Republic of Korea.
authors.forename: Aviannie
authors.initials: A
authors.lastname: Meillisa
authors.affiliation: Department of Chemical Engineering, Pukyong National University, 608-739, 365 Sinseon-ro, Nam-gu, Busan, Republic of Korea.
authors.forename: Hee-Chul
authors.initials: HC
authors.lastname: Woo
authors.affiliation: Department of Food Science and Technology, Pukyong National University, 608-737, 45 Yongso-ro, Nam-gu, Busan, Republic of Korea. Electronic address: bschun@pknu.ac.kr.
authors.forename: Byung-Soo
authors.initials: BS
authors.lastname: Chun
mesh_terms: D000464:Alginates / Q000737:chemistry; D000975:Antioxidants / Q000737:chemistry; D002384:Catalysis; D020723:Glucuronic Acid / Q000737:chemistry; D006603:Hexuronic Acids / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D008970:Molecular Weight; D009005:Monosaccharides / Q000737:chemistry*; D009844:Oligosaccharides / Q000737:chemistry*; D000459:Phaeophyceae / Q000737:chemistry; D011134:Polysaccharides / Q000737:chemistry*; D012624:Seaweed / Q000737:chemistry*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D013696:Temperature; D014867:Water / Q000737:chemistry*
chemical_list: D000464:Alginates; D000975:Antioxidants; D006603:Hexuronic Acids; D009005:Monosaccharides; D009844:Oligosaccharides; D011134:Polysaccharides; D014867:Water; D020723:Glucuronic Acid
keywords: Alginate; Bioactive compounds; Monosaccharides; Saccharina japonica; Subcritical water hydrolysis