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Volume 2, Issue 6
Displaying 1-7 of 7 articles from this issue
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K. Yoshikawa, H. Terada1977 Volume 2 Issue 6 Pages 406-418
Published: December 01, 1977
Released on J-STAGE: October 21, 2010
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T. Ueki1977 Volume 2 Issue 6 Pages 419-427
Published: December 01, 1977
Released on J-STAGE: October 21, 2010
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Lipoproteins as the model of biomembransJin Sato1977 Volume 2 Issue 6 Pages 428-433
Published: December 01, 1977
Released on J-STAGE: October 21, 2010
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Sachio Matsumoto1977 Volume 2 Issue 6 Pages 434-443
Published: December 01, 1977
Released on J-STAGE: October 21, 2010
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[in Japanese]1977 Volume 2 Issue 6 Pages 444-458
Published: December 01, 1977
Released on J-STAGE: October 21, 2010
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In Tetrahymena as a Model MembraneYasuo Kitajima, Yoshinori Nozawa1977 Volume 2 Issue 6 Pages 463-468
Published: December 01, 1977
Released on J-STAGE: October 21, 2010
JOURNAL FREE ACCESSThe temperature dependency of the membrane particle reorganization, which is probably an indication of lipid phase separation, was quantitatively examined on the outer alveolar membrane of Telralzymena cells by freeze-fracture electron microscopy. The degree of particle aggregation (particle density index, PDI) determined by measuring the particle number per square micrometer on the fractured membrane was compared with the results of fluorescence polarization of 1, 6-diphenyl 1, 3, 5-hexatriene (DPH) embeded in the membrane. Fluidity of the outer alveolar membranes was modified by treating with an anesthetic, methoxyflurane or exogenous ergosterol. These altered membranes showed decreases of both onset temperature and degree of phase separation as examined by freeze-fracture electron microscopy, indicating an increase of fluidity which was confirmed by data of fluorescence polarization of DPH-labeled membranes. These results suggest the possibility that the PDI method by freeze-fracture electron microscopy may be useful for estimating fluidity changes of membranes.View full abstractDownload PDF (1622K) -
Danji Nomura, Osami Tozawa1977 Volume 2 Issue 6 Pages 469-475
Published: December 01, 1977
Released on J-STAGE: October 21, 2010
JOURNAL FREE ACCESSThe reverse osmosis separation of 1mM respective aqueous solution of aliphatic or aromatic amino acids was carried out by Bio-Engineering batch cell which has a maximum 200ml capacity and 32.2 cm2 of effective membrane area under an operating pressure of 20kg/cm2 and its temperature of 30°C.
The membranes used were DDS-cellulose acetate membrane, and the pH value of these solution was about 6.
The correlation of the dimensionless nonpolar parameter ω*ΣS* proposed by Matsuura et al. to the rejection value of these amino acids were examined.
Consequently, the rejection of these amino acids decreased in adverse manner to the increase of the absolute value of ω*ΣS*, also a close correlation was obtained between the number of carbon atoms in a nonpolar substituent of these amino acids and characteristic proportionality constant associated with ΣS*.
When the nonpolar substituent was straight, the value of ω* increased as the number of carbon atom increased, but when the nonpolar substituent was branched, it decreased as the number of carbon atom increased.
Results mentioned above appeared to satisfy the functional nature of ω*.
In summary, it was found that the equation, ln (D/Kδ) =lnC*+ρ*Σδ*+δ*ΣEs+ω*ΣS*, which was proposed by Matsuura et al. for nonionized polar aliphatic and alicyclic organic solutes in aqueous solution is applicable for estimation of separation titer of aliphatic and aromatic amino acid aqueous solution.View full abstractDownload PDF (784K)
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