1995 Fiscal Year Annual Research Report

脂肪酸2成分混合系の相挙動

Research Project

Project/Area Number	06660168
Research Institution	Fukuoka University
Principal Investigator	平松信康福岡大学, 理学部, 教授 (80122729)
Co-Investigator(Kenkyū-buntansha)	中村忠嗣福岡大学, 理学部, 助手 (60258514) 井上亨福岡大学, 理学部, 教授 (50078599)
Keywords	不飽和脂肪酸 / 混合系 / 結晶多形 / 圧力 / 相挙動 / 超高純度
Research Abstract	昨年度から引き続いて圧力下でのオレイン酸(OA)/パルミトレイン酸(POA)2成分混合系の相挙動について、高圧力下DTAを用いて調べた。この混合系はΔ鎖長は同じでω鎖が炭素数2個だけ異なる組み合わせである。固相液相の境界は、圧力の増加とともに高温度へシフトすることが分かった。いっぽう、相図上の相境界の形は今回実験で行った圧力範囲(〜200MPa)では、圧力の高低に関わらずほぼ変化しないこともわかった。以上の組み合わせの他に、ω鎖長が同じでΔ鎖長が炭素数2だけ異なる系、POA/アスクレピン酸(APA)の混合系についても調べてみたが、大気圧下の相溶の程度は前述のOA/POAとは異なるにもかかわらず、圧力に対する応答はほぼ同様であった。これらのことから、相溶性は圧力に対して200MPaまでの圧力下ではあまり敏感であるとは言えないと結論される。 OA/POA混合系に関して、我々はOA_3POA_2のモレキュラーコンプレックスが形成されることを以前に報告している。このOA_3POA_2の融点の圧力依存性から融解時の体積変化をクラウデュースクラペイロンの式を使って見積もってみたが、その結果、OAとPOAが独立に結晶化していると仮定したときの融解時の体積変化よりも小さく、OAとPOAが互い違いに隣り合って結晶化し、Δ鎖長の差異がボイドを形成していると仮定したときのそれよりも大きいことがわかった。このOA_3POA_2についての構造的なことについては現在のところ何も分かっていないので、この知見は、構造を議論する上での興味深い指針を与えると考えられる。

Research Products
(12 results)

All Other

All Publications (12 results)

[Publications] A. Nakamura, H. Okabe, K. Hara, and N. Hiramatsu: "Raman Peak in Low-Frequency Region of Dehydrated Egg-White Gel" Japanese Journal of Applied Physics, Part 2. 35. L43-L44 (1996)
[Publications] A. Nakamura, E. Takushi, and N. Hiramatsu: "Volume Change Behavior of DNA Gel under Pressure" Reports on Progress in Polymer Physics in Japan. 38. 711-712 (1995)
[Publications] A. Nakamura, H. Kanaya, K. Hara, E. Takushi, and N. Hiramatsu: "Time Resolved Small Angle X-ray Diffraction Measurement of DNA Gel Volume Phase Transition" Reports on Progress in Polymer Physics in Japan. 38. 713-714 (1995)
[Publications] H. Kanaya, K. Hara, A. Nakamura, and N. Hiramatsu: "Time Resolved Turbidimetric Studies of Pressure and Temperature Effects during Gelation Process of Egg-White" Reports on Progress in Polymer Physics in Japan. 38. 699-702 (1995)
[Publications] K. Hara, T. Masuike, A. Nakamura, H. Okabe, S. Kai, and N. Hiramatsu: "Correlation between Raman Spectrum Anomaly and Weight Change during the Dehydration Process of Polyacrylamide Gel" Reports on Progress in Polymer Physics in Japan. 38. 181-184 (1995)
[Publications] K. Hara, T. Masuike, A. Nakamura, H. Okabe, and N. Hiramatsu: "Raman Scattering Study during the Dehydration Process of Polyacrylamide Gel" Japanese Journal of Applied Physics, Part 1.34. 5700-5705 (1995)
[Publications] Y. Nibu and T. Inoue: "Miscibility of Binary Phospholipid Mixtures Under Hydrated and Non-hydrated Conditions. II. Phosphatidylethanolamines with Different Acyl Chain Length" Chem. Phys. Lipids. 76. 159-169 (1995)
[Publications] T. Inoue and Y. Nibu: "Miscibility of Binary Phospholipid Mixtures Under Hydrated and Non-hydrated Conditions. III. Reinvestigation of Phosphatidic Acids with Different Acyl Chain Length" Chem. Phys. Lipids. 76. 171-179 (1995)
[Publications] T. Inoue and Y. Nibu: "Miscibility of Binary Phospholipid Mixtures Under Hydrated and Non-hydrated Conditions. IV. Phosphatidylglycerols with Different Acyl Chain Length" Chem. Phys. Lipids. 76. 181-191 (1995)
[Publications] Y. Nibu and T. Inoue: "Effect of Headgroup Type on the Miscibility of Homologous Phospholipids with Different Acyl Chain Length in Hydrated Bilayer" Biophys. Chem.56. 273-280 (1995)
[Publications] S. Lee et al.: "Homooligopeptides Composed of Hydrophobic Amino Acid Residues Interact in a Specific Manner by Taking α-Helix or β-Structure Toward Lipid Bilayers" Biopolymers. 36. 391-398 (1995)
[Publications] K. Okuma, T. Ishida, S. Morita, H. Ohta, and T. Inoue: "The Reaction of Stable Phosphorus Ylides with Elemental Sulfur. Formation of Olefines ; Cis-trans Selectivity" Heteroatom Chem.6. 265-270 (1995)

1995 Fiscal Year Annual Research Report

脂肪酸2成分混合系の相挙動

Principal Investigator

平松 信康 福岡大学, 理学部, 教授 (80122729)

Research Products

[Publications] A. Nakamura, H. Okabe, K. Hara, and N. Hiramatsu: "Raman Peak in Low-Frequency Region of Dehydrated Egg-White Gel" Japanese Journal of Applied Physics, Part 2. 35. L43-L44 (1996)

[Publications] A. Nakamura, E. Takushi, and N. Hiramatsu: "Volume Change Behavior of DNA Gel under Pressure" Reports on Progress in Polymer Physics in Japan. 38. 711-712 (1995)

[Publications] A. Nakamura, H. Kanaya, K. Hara, E. Takushi, and N. Hiramatsu: "Time Resolved Small Angle X-ray Diffraction Measurement of DNA Gel Volume Phase Transition" Reports on Progress in Polymer Physics in Japan. 38. 713-714 (1995)

[Publications] H. Kanaya, K. Hara, A. Nakamura, and N. Hiramatsu: "Time Resolved Turbidimetric Studies of Pressure and Temperature Effects during Gelation Process of Egg-White" Reports on Progress in Polymer Physics in Japan. 38. 699-702 (1995)

[Publications] K. Hara, T. Masuike, A. Nakamura, H. Okabe, S. Kai, and N. Hiramatsu: "Correlation between Raman Spectrum Anomaly and Weight Change during the Dehydration Process of Polyacrylamide Gel" Reports on Progress in Polymer Physics in Japan. 38. 181-184 (1995)

[Publications] K. Hara, T. Masuike, A. Nakamura, H. Okabe, and N. Hiramatsu: "Raman Scattering Study during the Dehydration Process of Polyacrylamide Gel" Japanese Journal of Applied Physics, Part 1.34. 5700-5705 (1995)

[Publications] Y. Nibu and T. Inoue: "Miscibility of Binary Phospholipid Mixtures Under Hydrated and Non-hydrated Conditions. II. Phosphatidylethanolamines with Different Acyl Chain Length" Chem. Phys. Lipids. 76. 159-169 (1995)

[Publications] T. Inoue and Y. Nibu: "Miscibility of Binary Phospholipid Mixtures Under Hydrated and Non-hydrated Conditions. III. Reinvestigation of Phosphatidic Acids with Different Acyl Chain Length" Chem. Phys. Lipids. 76. 171-179 (1995)

[Publications] T. Inoue and Y. Nibu: "Miscibility of Binary Phospholipid Mixtures Under Hydrated and Non-hydrated Conditions. IV. Phosphatidylglycerols with Different Acyl Chain Length" Chem. Phys. Lipids. 76. 181-191 (1995)

[Publications] Y. Nibu and T. Inoue: "Effect of Headgroup Type on the Miscibility of Homologous Phospholipids with Different Acyl Chain Length in Hydrated Bilayer" Biophys. Chem.56. 273-280 (1995)

[Publications] S. Lee et al.: "Homooligopeptides Composed of Hydrophobic Amino Acid Residues Interact in a Specific Manner by Taking α-Helix or β-Structure Toward Lipid Bilayers" Biopolymers. 36. 391-398 (1995)

[Publications] K. Okuma, T. Ishida, S. Morita, H. Ohta, and T. Inoue: "The Reaction of Stable Phosphorus Ylides with Elemental Sulfur. Formation of Olefines ; Cis-trans Selectivity" Heteroatom Chem.6. 265-270 (1995)

平松信康福岡大学, 理学部, 教授 (80122729)