Isolation and structural elucidation of a water-soluble polysaccharide (PS-I) of a wild edible mushroom, Termitomyces striatus

2006 ◽  
Vol 341 (7) ◽  
pp. 878-886 ◽  
Author(s):  
Soumitra Mondal ◽  
Indranil Chakraborty ◽  
Dilip Rout ◽  
Syed S. Islam
Keyword(s):  
Edible Mushroom ◽  
Structural Elucidation ◽  
Water Soluble ◽  
Ps I ◽  
Soluble Polysaccharide ◽  
Wild Edible Mushroom

Structural elucidation and antioxidant activity of a water-soluble polysaccharide from the fruit bodies of Bulgaria inquinans (Fries)

2013 ◽  
Vol 138 (2-3) ◽  
pp. 1470-1475 ◽  
Author(s):  
Hongtao Bi ◽  
Tingting Gao ◽  
Zonghong Li ◽  
Li Ji ◽  
Wei Yang ◽  
...  
Keyword(s):  
Antioxidant Activity ◽  
Structural Elucidation ◽  
Water Soluble ◽  
Soluble Polysaccharide

Chemical analysis of an immunoenhancing water-soluble polysaccharide of an edible mushroom, Pleurotus florida blue variant

2010 ◽  
Vol 345 (18) ◽  
pp. 2736-2741 ◽  
Author(s):  
Biswajit Dey ◽  
Sanjoy K. Bhunia ◽  
Kankan K. Maity ◽  
Sukesh Patra ◽  
Soumitra Mandal ◽  
...  
Keyword(s):  
Chemical Analysis ◽  
Edible Mushroom ◽  
Water Soluble ◽  
Pleurotus Florida ◽  
Soluble Polysaccharide

Molecular, rheological and physicochemical characterisation of puka gum, an arabinogalactan-protein extracted from the Meryta sinclairii tree

2020 ◽  
Author(s):  
MSM Wee ◽  
Ian Sims ◽  
KKT Goh ◽  
L Matia-Merino
Keyword(s):  
Hydrodynamic Radius ◽  
Average Molecular Weight ◽  
Gum Arabic ◽  
Water Soluble ◽  
Arabinogalactan Protein ◽  
Type Ii ◽  
Weight Average Molecular Weight ◽  
Soluble Polysaccharide ◽  
Physicochemical Characterisation ◽  
Increasing Temperature

© 2019 Elsevier Ltd A water-soluble polysaccharide (type II arabinogalactan-protein) extracted from the gum exudate of the native New Zealand puka tree (Meryta sinclairii), was characterised for its molecular, rheological and physicochemical properties. In 0.1 M NaCl, the weight average molecular weight (Mw) of puka gum is 5.9 × 106 Da with an RMS radius of 56 nm and z-average hydrodynamic radius of 79 nm. The intrinsic viscosity of the polysaccharide is 57 ml/g with a coil overlap concentration 15% w/w. Together, the shape factor, p, of 0.70 (exponent of RMS radius vs. hydrodynamic radius), Smidsrød-Haug's stiffness parameter B of 0.031 and Mark-Houwink exponent α of 0.375 indicate that the polysaccharide adopts a spherical conformation in solution, similar to gum arabic. The pKa is 1.8. The polysaccharide exhibits a Newtonian to shear-thinning behaviour from 0.2 to 25% w/w. Viscosity of the polysaccharide (1 s−1) decreases with decreasing concentration, increasing temperature, ionic strength, and at acidic pH.

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