Depolymerization of sodium alginate under hydrothermal conditions

Taku Michael Aida; Takuji Yamagata; Masaru Watanabe; Richard L. Smith

doi:10.1016/j.carbpol.2009.11.032

Depolymerization of sodium alginate under hydrothermal conditions

Taku Michael Aida, Takuji Yamagata, Masaru Watanabe, Richard L. Smith

ENG - Research Center of Supercritical Fluid Terchnolody

Tohoku University

Research output: Contribution to journal › Article › peer-review

73 Citations (Scopus)

Abstract

The depolymerization of sodium alginate with hydrothermal treatment (180-240 °C) was studied to understand the selectivity of monosaccharide generation. Alginate depolymerized to oligosaccharides, monosaccharides and decomposition products that included lactic acid and glycolic acid. Alginate depolymerization under hydrothermal conditions occurred in a manner that initially released mannuronic acid (M) and then was followed by the release of guluronic acid (G). Monosaccharides were generated through the hydrolysis of the glycosidic bonds between the unit monomer with different selectivities among M-M, M-G and G-G units rather than random sites within alginate. Hydrothermal treatments shows promise as a method to modify the structure of alginate polymers. Crown

Original language	English
Pages (from-to)	296-302
Number of pages	7
Journal	Carbohydrate Polymers
Volume	80
Issue number	1
DOIs	https://doi.org/10.1016/j.carbpol.2009.11.032
Publication status	Published - 2010 Mar 25

Keywords

Alginate
Decomposition
Depolymerization
Guluronic acid
Hydrolysis
Hydrothermal
Mannuronic acid
Monosaccharide
Polysaccharide

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10.1016/j.carbpol.2009.11.032

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title = "Depolymerization of sodium alginate under hydrothermal conditions",

abstract = "The depolymerization of sodium alginate with hydrothermal treatment (180-240 °C) was studied to understand the selectivity of monosaccharide generation. Alginate depolymerized to oligosaccharides, monosaccharides and decomposition products that included lactic acid and glycolic acid. Alginate depolymerization under hydrothermal conditions occurred in a manner that initially released mannuronic acid (M) and then was followed by the release of guluronic acid (G). Monosaccharides were generated through the hydrolysis of the glycosidic bonds between the unit monomer with different selectivities among M-M, M-G and G-G units rather than random sites within alginate. Hydrothermal treatments shows promise as a method to modify the structure of alginate polymers. Crown",

keywords = "Alginate, Decomposition, Depolymerization, Guluronic acid, Hydrolysis, Hydrothermal, Mannuronic acid, Monosaccharide, Polysaccharide",

author = "Aida, {Taku Michael} and Takuji Yamagata and Masaru Watanabe and Smith, {Richard L.}",

note = "Funding Information: We thank Dr. Masao Konno, Riken Shokuhin Co. Ltd. (Japan, Miyagi), for providing the monosaccharides standards. We thank Mr. Hiroaki Saito (Tohoku University, Japan) for the NMR analysis, Ms. Aya Haneda (Tohoku University, Japan) for the MALDI-TOF-MS analysis. Financial support from Global COE (Tohoku University) is gratefully acknowledged. ",

year = "2010",

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doi = "10.1016/j.carbpol.2009.11.032",

language = "English",

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AU - Aida, Taku Michael

AU - Yamagata, Takuji

AU - Watanabe, Masaru

AU - Smith, Richard L.

N1 - Funding Information: We thank Dr. Masao Konno, Riken Shokuhin Co. Ltd. (Japan, Miyagi), for providing the monosaccharides standards. We thank Mr. Hiroaki Saito (Tohoku University, Japan) for the NMR analysis, Ms. Aya Haneda (Tohoku University, Japan) for the MALDI-TOF-MS analysis. Financial support from Global COE (Tohoku University) is gratefully acknowledged.

PY - 2010/3/25

Y1 - 2010/3/25

N2 - The depolymerization of sodium alginate with hydrothermal treatment (180-240 °C) was studied to understand the selectivity of monosaccharide generation. Alginate depolymerized to oligosaccharides, monosaccharides and decomposition products that included lactic acid and glycolic acid. Alginate depolymerization under hydrothermal conditions occurred in a manner that initially released mannuronic acid (M) and then was followed by the release of guluronic acid (G). Monosaccharides were generated through the hydrolysis of the glycosidic bonds between the unit monomer with different selectivities among M-M, M-G and G-G units rather than random sites within alginate. Hydrothermal treatments shows promise as a method to modify the structure of alginate polymers. Crown

AB - The depolymerization of sodium alginate with hydrothermal treatment (180-240 °C) was studied to understand the selectivity of monosaccharide generation. Alginate depolymerized to oligosaccharides, monosaccharides and decomposition products that included lactic acid and glycolic acid. Alginate depolymerization under hydrothermal conditions occurred in a manner that initially released mannuronic acid (M) and then was followed by the release of guluronic acid (G). Monosaccharides were generated through the hydrolysis of the glycosidic bonds between the unit monomer with different selectivities among M-M, M-G and G-G units rather than random sites within alginate. Hydrothermal treatments shows promise as a method to modify the structure of alginate polymers. Crown

KW - Alginate

KW - Decomposition

KW - Depolymerization

KW - Guluronic acid

KW - Hydrolysis

KW - Hydrothermal

KW - Mannuronic acid

KW - Monosaccharide

KW - Polysaccharide

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VL - 80

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JO - Carbohydrate Polymers

JF - Carbohydrate Polymers

IS - 1

ER -

Depolymerization of sodium alginate under hydrothermal conditions

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Keywords

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