Affiliation:
1. Laboratoire de Biochimie et Microbiologie Appliquee (LBMA), Departement de Biochimie, Faculte des Sciences, Universite Badji Mokhtar, BP12, 23000 Annaba, Algeria
2. Departement de Biologie, Faulte des Sciences, Universite Amar Telidji, Route de Ghardaia BP G37, Laghouat 03000, Algeria
Abstract
Background:
The galactomannans are water-soluble carbohydrates widely used in the
food, pharmaceutical, biomedical, cosmetic, textile and paper industries. Recently, a need for an alternative
industrial source of galactomannans has arisen; one possible source is Honey locust
(Gleditsia triacanthos), which is abundant in Algeria.
Objective:
The main objective of this study was to determine the physicochemical and rheological
properties of Water-Soluble Galactomannan (WSG) purified from the seeds of Algerian Honey locust
(Gleditsia triacanthos L.).
Methods:
The galactomannan was purified from the seeds of Gleditsia triacanthos and was structurally
characterized by chromatographic (HPAEC, HPSEC-RID-MALLS) and spectroscopic (FT-IR,
1H, 13C NMR) methods.
Results:
The Honey locust seed contains a high level of WSG (yield, 10%), and the molecular
weight of its WSG was approximately 871.9 kDa. A highly viscous solution was obtained and had
an intrinsic viscosity [η] of 7.14-7.25 dL/g and an optical activity [α]D of +38.7°. Chromatographic
and spectroscopic analyses indicated the presence of β-D-mannopyranose and α-D-galactopyranose
in the heteropolysaccharide at a molar ratio of 2.86:1. The linear backbone of its macromolecule has
a central core composed of 4-linked β-mannose units, with branches of galactose, linked to the carbohydrate
core through α(1-6) linkage.
Conclusion:
These results lead to the conclusion that galactomannan presents the desirable physicochemical
characteristics suitable for applications in the pharmaceutical, cosmetic and food industries.
Publisher
Bentham Science Publishers Ltd.
Subject
Complementary and alternative medicine,Drug Discovery
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