Journal
JOURNAL OF APPLIED PHYCOLOGY
Volume 22, Issue 5, Pages 623-627Publisher
SPRINGER
DOI: 10.1007/s10811-010-9502-1
Keywords
Gracilaria debilis; Gracilaria salicornia; Galactans; C-13 NMR; GC-MS
Funding
- CSIR, New Delhi
- Department of Science & Technology, New Delhi (DST) [SR/FT/CS-001/2008]
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Superior quality non-methylated and low-sulphated galactans were extracted from two Indian agarophytes namely Gracilaria debilis and G. salicornia growing naturally along the west coast of India, using an eco-friendly method developed in our laboratory. The galactans were characterised by FT-IR, C-13 NMR, GC-MS, ICP, GPC and rheological measurements. G. debilis produced exclusively non-methylated galactan exhibiting the greatest gel strength of 650 +/- 25 g cm(-2) and lowest sulphate of 0.21 +/- 0.06%. On the contrary, G. salicornia polysaccharide was composed of non-methylated galactose (major) and mannose (minor), having gel strength of 510 +/- 25 g cm(-2) and sulphate of 0.45 +/- 0.06%. Very low heavy metal contents were determined in both the galactan samples, which may thus be potentially useful in food and biological applications.
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