ISSN:
1436-2449
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Summary Seven fractions of a (1→3)-α-D-glucan from Ganoderma lucidum have been studied by light scattering, sedimentation equilibrium, and viscometry in dimethylsulfoxide (DMSO) containing 0.25 M lithium chloride at 25°C. The intrinsic viscosity [η] - molecular weight relation for this glucan in the mixed solvent is found to be represented approximately by [η] = 0.071 M w 0.60 cm3 g−1 in the range of weight-average molecular weight M w studied, i.e., from 8 × 103 to 4.4 × 105. Its analysis based on current theories for wormlike chains shows that, without excluded volume effect, the (1→3)-α-D-glucan chain is characterized by a linear mass density of 380 nm−1, a Kuhn segment length of about 3 nm, and a diameter of 1.2 nm and is somewhat more extended but more flexible than amylose, a (1→4)-α-glucan, in DMSO.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s002890050389
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