期刊
CARBOHYDRATE POLYMERS
卷 99, 期 -, 页码 199-207出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2013.08.021
关键词
Dextran; Polysaccharides; Leuconostoc citreum; Weissella confusa; HPSEC; AsFlFFF; DOSY
资金
- Academy of Finland [128898]
- University of Helsinki Research Funds
- Glycoscience Graduate School
- Finnish Cultural Foundation
- Raisio Research Foundation
- Academy of Finland (AKA) [128898, 128898] Funding Source: Academy of Finland (AKA)
Dilute solutions of various dextran standards, a high-molar mass (HMM) commercial dextran from Leuconostoc spp., and HMM dextrans isolated from Weissella confusa and Leuconostoc citreum were analyzed with high-performance size-exclusion chromatography (HPSEC), asymmetric flow field-flow fractionation (AsFlFFF), and diffusion-ordered NMR spectroscopy (DOSY). HPSEC analyses were performed in aqueous and dimethyl sulfoxide (DMSO) solutions, while only aqueous solutions were utilized in AsFlFFF and DOSY. The study showed that all methods were applicable to dextran analysis, but differences between the aqueous and DMSO-based solutions were obtained for HMM samples. These differences were attributed to the presence of aggregates in aqueous solution that were less prevalent in DMSO. The study showed that DOSY provides an estimate of the size of HMM dextrans, though calibration standards may be required for each experimental set-up. To our knowledge, this is the first study utilizing these three methods in analyzing HMM dextrans. (C) 2013 Elsevier Ltd. All rights reserved.
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