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DC Field | Value | Language |
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dc.citation.endPage | 3502 | - |
dc.citation.number | 23 | - |
dc.citation.startPage | 3497 | - |
dc.citation.title | JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | - |
dc.citation.volume | 43 | - |
dc.contributor.author | Hong, L | - |
dc.contributor.author | Granick, S | - |
dc.date.accessioned | 2023-12-22T10:10:01Z | - |
dc.date.available | 2023-12-22T10:10:01Z | - |
dc.date.created | 2020-07-29 | - |
dc.date.issued | 2005-12 | - |
dc.description.abstract | Two charged polypeptides of opposite charge, poly(glutamic acid) (negative charge) and polylysine (positive charge), were end-labeled with Alexa fluorescent dyes, and their translational diffusion coefficient (D) values in dilute solutions (similar to 10(-4) mg mL(-1)) were studied at the biological pH with fluorescence correlation spectroscopy as a function of the ionic strength (C-s) mediated by the addition of NaCl. At a moderate ionic strength, D increased consistently with expected chain contraction because of electrostatic screening. At a very high ionic strength, D of poly(glutamic acid) increased more rapidly, following the empirical power law R-H similar to C-s(-1/2) over a limited range of C-s, where the changes in D were interpreted as changes in the hydrodynamic radius, R-H. However, D of polylysine at first decreased but eventually passed through a maximum followed by a decrease. These large increases implied that R-H decreased considerably, in turn implying a strong contraction of the chain conformations even though the polymer remained soluble and showed no evidence of aggregation. For polylysine, the unexpected minimum R-H value may be related to the salting-in phenomenon. | - |
dc.identifier.bibliographicCitation | JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, v.43, no.23, pp.3497 - 3502 | - |
dc.identifier.doi | 10.1002/polb.20662 | - |
dc.identifier.issn | 0887-6266 | - |
dc.identifier.scopusid | 2-s2.0-30544436698 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/47332 | - |
dc.identifier.url | https://onlinelibrary.wiley.com/doi/full/10.1002/polb.20662 | - |
dc.identifier.wosid | 000233393300021 | - |
dc.language | 영어 | - |
dc.publisher | JOHN WILEY & SONS INC | - |
dc.title | Charged polypeptide diffusion at a very high ionic strength | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Polymer Science | - |
dc.relation.journalResearchArea | Polymer Science | - |
dc.type.docType | Article; Proceedings Paper | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | diffusion | - |
dc.subject.keywordAuthor | fluorescence | - |
dc.subject.keywordAuthor | polyelectrolytes | - |
dc.subject.keywordPlus | POLYELECTROLYTE SOLUTIONS | - |
dc.subject.keywordPlus | SURFACE | - |
dc.subject.keywordPlus | SALT | - |
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