Hydrolytic stability of water-soluble spruce O-acetyl galactoglucomannans

Chunlin Xu; Andrey Pranovich; Jarl Hemming; Bjarne Holmbom; Simone Albrecht; Henk A. Schols; Stefan Willför

doi:10.1515/HF.2009.021

Hydrolytic stability of water-soluble spruce O-acetyl galactoglucomannans

Chunlin Xu^*, Andrey Pranovich, Jarl Hemming, Bjarne Holmbom, Simone Albrecht, Henk A. Schols, Stefan Willför

^*Corresponding author for this work

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

27 Citations (Scopus)

Abstract

Water-soluble native O-acetyl galactoglucomannan (GGM) from spruce is a polysaccharide that can be produced in an industrial scale. To develop GGM applications, information is needed on its stability, particularly under acidic conditions. Therefore, acid hydrolysis of spruce GGM was investigated at various pH levels and temperatures. The results allow an estimation of the stability of GGM under food processing conditions and in biological systems. Determination of the average molar mass demonstrated that spruce GGM was stable at pH 1 and 37°C, as well as at pH 3 and 70°C. GGM was hydrolysed at pH 1 and 90°C. GGM oligomers and monomers were detected after degradation. Some of the oligomers contained O-acetyl groups. Monosaccharides were the predominant products in the hydrolysates after treatment at pH 1 and 90°C for 48 h. Pentoses, present in GGM samples as impurities, were released more easily than GGM hexoses. Glucose was more difficult to release than mannose. Traces of 6-deoxy-mannose and levoglucosan were found in the hydrolysates, indicating further degradation of hydrolysed monosaccharides.

Original language	English
Pages (from-to)	61-68
Number of pages	8
Journal	Holzforschung
Volume	63
Issue number	1
DOIs	https://doi.org/10.1515/HF.2009.021
Publication status	Published - 1 Jan 2009
MoE publication type	A1 Journal article-refereed

Keywords

Acid hydrolysis
Galactoglucomannan (GGM)
Monomers
O-acetyl galactoglucomannans
Oligomers
Stability

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10.1515/HF.2009.021

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title = "Hydrolytic stability of water-soluble spruce O-acetyl galactoglucomannans",

abstract = "Water-soluble native O-acetyl galactoglucomannan (GGM) from spruce is a polysaccharide that can be produced in an industrial scale. To develop GGM applications, information is needed on its stability, particularly under acidic conditions. Therefore, acid hydrolysis of spruce GGM was investigated at various pH levels and temperatures. The results allow an estimation of the stability of GGM under food processing conditions and in biological systems. Determination of the average molar mass demonstrated that spruce GGM was stable at pH 1 and 37°C, as well as at pH 3 and 70°C. GGM was hydrolysed at pH 1 and 90°C. GGM oligomers and monomers were detected after degradation. Some of the oligomers contained O-acetyl groups. Monosaccharides were the predominant products in the hydrolysates after treatment at pH 1 and 90°C for 48 h. Pentoses, present in GGM samples as impurities, were released more easily than GGM hexoses. Glucose was more difficult to release than mannose. Traces of 6-deoxy-mannose and levoglucosan were found in the hydrolysates, indicating further degradation of hydrolysed monosaccharides.",

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author = "Chunlin Xu and Andrey Pranovich and Jarl Hemming and Bjarne Holmbom and Simone Albrecht and Schols, {Henk A.} and Stefan Willf{\"o}r",

note = "Funding Information: This work was financed by the Academy of Finland (FA 207091), which is gratefully acknowledged. This work is part of the activities at the {\AA}bo Akademi Process Chemistry Centre within the Finnish Centre of Excellence Programme (2000–2011) by the Academy of Finland, and also part of the activities within the EPNOE network (European Polysaccharide Network of Excellence). Part of the work was done within the EU project WaCheUp (EU STREP 013896). Copyright: Copyright 2009 Elsevier B.V., All rights reserved.",

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AU - Hemming, Jarl

AU - Holmbom, Bjarne

AU - Albrecht, Simone

AU - Schols, Henk A.

AU - Willför, Stefan

N1 - Funding Information: This work was financed by the Academy of Finland (FA 207091), which is gratefully acknowledged. This work is part of the activities at the Åbo Akademi Process Chemistry Centre within the Finnish Centre of Excellence Programme (2000–2011) by the Academy of Finland, and also part of the activities within the EPNOE network (European Polysaccharide Network of Excellence). Part of the work was done within the EU project WaCheUp (EU STREP 013896). Copyright: Copyright 2009 Elsevier B.V., All rights reserved.

PY - 2009/1/1

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N2 - Water-soluble native O-acetyl galactoglucomannan (GGM) from spruce is a polysaccharide that can be produced in an industrial scale. To develop GGM applications, information is needed on its stability, particularly under acidic conditions. Therefore, acid hydrolysis of spruce GGM was investigated at various pH levels and temperatures. The results allow an estimation of the stability of GGM under food processing conditions and in biological systems. Determination of the average molar mass demonstrated that spruce GGM was stable at pH 1 and 37°C, as well as at pH 3 and 70°C. GGM was hydrolysed at pH 1 and 90°C. GGM oligomers and monomers were detected after degradation. Some of the oligomers contained O-acetyl groups. Monosaccharides were the predominant products in the hydrolysates after treatment at pH 1 and 90°C for 48 h. Pentoses, present in GGM samples as impurities, were released more easily than GGM hexoses. Glucose was more difficult to release than mannose. Traces of 6-deoxy-mannose and levoglucosan were found in the hydrolysates, indicating further degradation of hydrolysed monosaccharides.

AB - Water-soluble native O-acetyl galactoglucomannan (GGM) from spruce is a polysaccharide that can be produced in an industrial scale. To develop GGM applications, information is needed on its stability, particularly under acidic conditions. Therefore, acid hydrolysis of spruce GGM was investigated at various pH levels and temperatures. The results allow an estimation of the stability of GGM under food processing conditions and in biological systems. Determination of the average molar mass demonstrated that spruce GGM was stable at pH 1 and 37°C, as well as at pH 3 and 70°C. GGM was hydrolysed at pH 1 and 90°C. GGM oligomers and monomers were detected after degradation. Some of the oligomers contained O-acetyl groups. Monosaccharides were the predominant products in the hydrolysates after treatment at pH 1 and 90°C for 48 h. Pentoses, present in GGM samples as impurities, were released more easily than GGM hexoses. Glucose was more difficult to release than mannose. Traces of 6-deoxy-mannose and levoglucosan were found in the hydrolysates, indicating further degradation of hydrolysed monosaccharides.

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Hydrolytic stability of water-soluble spruce O-acetyl galactoglucomannans

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Keywords

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