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Hokkaido University Collection of Scholarly and Academic Papers >
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Raman spectroscopic measurements on DEPC liposome : phase transition observation under Xe-gas pressure
| Title: | Raman spectroscopic measurements on DEPC liposome : phase transition observation under Xe-gas pressure |
| Authors: | Uchida, Tsutomu Browse this author →KAKEN DB | | Sum, Amadeu K. Browse this author |
| Issue Date: | 31-Mar-2013 |
| Publisher: | 北海道大学低温科学研究所 |
| Journal Title: | 低温科学 |
| Journal Title(alt): | Low Temperature Science |
| Volume: | 71 |
| Start Page: | 105 |
| End Page: | 110 |
| Abstract: | Raman spectroscopic analysis was applied to observe the phase transition of dielaidoylphosphatidylcholine (DEPC) liposome under 0.5 MPa Xe pressurization conditions. After the band assignments on DEPC molecule, detailed measurements of the methylene C-H stretching mode spectra were performed. The data revealed that all three peaks associated with DEPC, including the C-H stretching mode,shifted to lower wavenumbers at lower temperatures and that the relative intensities of Raman spectra changed simultaneously. These changes on Raman spectra occurred at approximately 280 K, suggesting a gel to liquid crystalline phase transition. This temperature is lower than that under atmospheric pressure, and it is consistent with DEPC liposomes exposed to Xe measured with differential scanning calorimetric under similar conditions. |
| Type: | bulletin (article) |
| URI: | http://hdl.handle.net/2115/52360 |
| Appears in Collections: | 低温科学 = Low Temperature Science > 第71巻
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Submitter: 低温科学研究所図書室
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