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Acta Physiologica Hungarica
Authors: Vladimir Ajdžanović, V Jakovljević, D Milenković, A Konić-Ristić, J Živanović, I Jarić, and V Milošević

References 1. Ajdžanović V , Spasojević I , Filipović B , Šošić-Jurjević B , Sekulić M , Milošević V : Effects of genistein and daidzein on erythrocyte membrane fluidity: an electron paramagnetic resonance study . Can. J

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Clinical and Experimental Medical Journal
Authors: Denisa Margina, Mihaela Ilie, Daniela Gradinaru, Maria Vladica, Cornelia Pencea, Niculina Mitrea, and Eva Katona

– 213 . [14]. S. Hollan 1996 Membrane fluidity of blood cells Haematologia (Budapest) 27 109 – 127 . [15]. Expert Committee 1997 Report of the expert committee on the diagnosis and classification of diabetes mellitus Diabet. Care

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145 809 818 Krishnamurthy, Smriti S., Prasad, R.: Membrane fluidity affects functions of Cdr1p, a multidrug ABC transporter of Candida albicans

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Abstract  

Power-time curves and metabolic properties of Tetrahymena thermophila BF5 exposed to different Yb3+ levels were studied by ampoule method of isothermal calorimetry at 28°C. Metabolic rate (r) decreased significantly while peak time (PT) increased with the increase of Yb3+. These results were mainly due to the inhibition of cell growth, which corresponded to the decrease of cell number obtained by cell counting. Compared with cell counting, calorimetry was sensible, easy to use and convenient for monitoring the toxic effects of Yb3+ on cells and freshwater ecosystem. It was also found that cell membrane fluidity decreased significantly under the effects of Yb3+, which indicated that Yb3+ could be membrane active molecules with its effect on cell membranes as fundamental aspect of its toxicity.

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Acta Biologica Hungarica
Authors: Eszter Virág, Á. Juhász, R. Kardos, Z. Gazdag, G. Papp, Ágota Pénzes, M. Nyitrai, Cs. Vágvölgyi, and M. Pesti

243 260 Kuhry, J. G., Fonteneau, P., Duportail, G., Maechling, C., Laustriat, G. (1983) TMA-DPH: a suitable fluorescence polarization probe for specific plasma membrane fluidity

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enzymatic activity, low temperature causes drastic decrease of membrane fluidity [ 13 ]. As this latter effect means a fundamental difference compared to the physiologic consequences of growth arrest by mupirocin, probably it is the main cause of the major

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Abstract  

The power-time curves of Tetrahymena thermophila exposed to tributyltin (TBT) were detected by microcalorimetry. Metabolic rate (r) decreased significantly while peak time (PT) increased with the enhancement of TBT level. Compared with the measured multibiomarker including catalase, lactate dehydrogenase, glutathione S-transferase, ATPase and membrane fluidity, PT and r could be sensitive biomarkers for assessing TBT toxicity at cellular level. The effective concentrations obtained by them were consistent to those obtained by the protozoan community toxicity test. As a result, the microcalorimetric assay of T. thermophila had a great potential in assessing TBT acute toxicity and monitoring TBT pollution in the freshwater ecosystem.

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Journal of Thermal Analysis and Calorimetry
Authors: Maksim Ionov, Barbara Klajnert, Konstantinos Gardikis, Sophia Hatziantoniou, Bartlomiej Palecz, Bakhtiyar Salakhutdinov, Josep Cladera, Maria Zamaraeva, Costas Demetzos, and Maria Bryszewska

Abstract  

To investigate the molecular interaction of amyloid beta peptides Aβ1–28 or Aβ25–40 with model lipid membranes differential scanning calorimetry (DSC) and DPH and TMA DPH fluorescence anisotropy approaches were used. The main transition temperature (T m) and enthalpy change (ΔH) of model lipid membranes composed of DMPC/DPPG on addition of Aβ25–40 or Aβ25–40 at 10:1 (w/w) phospholipid/peptide ratio either non-aggregated or previously aggregated were examined. The effect of Aβ1–28 and Aβ25–40 on the membrane fluidity of liposomes made of DMPC/DPPG (98:2 w/w) was determined by fluorescence anisotropy of incorporated DPH and TMA DPH. The results of this study provide information that Aβ1–28 preferentially interacts with the hydrophilic part of the model membranes, while Aβ25–40 rather locates itself in the hydrophobic core of the bilayer where it reduces the order of the phospholipids packing.

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., Hornstra, G. (1989) Influence of dietary fatty acids on membrane fluidity and activation of rat platelets. Biochim. Biophys. Acta 1004 , 252-260. Influence of dietary fatty acids on membrane fluidity and activation of rat

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