Rehydration of Digalactosyldiacylglycerol Model Membrane Lyophilizates Observed by NMR and Sorption Isotherm

• Authors: H. Harańczyk , M. Bacior , J. Jamróz , M. Jemioła-Rzemińska , K. Strzałka
• Languages of publication: EN

Abstracts

EN

The initial stages of rehydration of digalactosyldiacylglycerol model membrane lyophilizates were observed using hydration kinetics, sorption isotherm, and high power proton relaxometry (at 30 MHz). Hydration time courses are single exponential and the sorption isotherm is sigmoidal in form. The mass of water saturating primary binding sites equals Δ M/m_0= 0.019±0.001. Proton free induction decays distinguish (i) immobilized protons of solid matrix of lyophilizate, signal S_0; (ii) protons of water fraction tightly bound to the lyophilizate surface, L_1; and (iii) mobile protons of loosely bound water pool, L_2. Hydration dependence of total water signal (L_1+L_2)/S_0 shows the presence of water fraction "sealed" in liposome structures, which equals Δ M_{S}/m_0 = 0.092±0.007.

Keywords

EN

82.56.Na

Discipline

• 82.56.Na: Relaxation

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2009
• Volume: 115
• Issue: 2
• Pages: 521-525

Dates

published

2009-02

Contributors

author

H. Harańczyk

• Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Cracow, Poland

author

M. Bacior

• Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Cracow, Poland

author

J. Jamróz

• Institute of Physics, Jagiellonian University, Reymonta 4, 30-059 Cracow, Poland

author

M. Jemioła-Rzemińska

• Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Cracow, Poland

author

K. Strzałka

• Faculty of Biochemistry, Biophysics and Biotechnology, Jagiellonian University, Gronostajowa 7, 30-387 Cracow, Poland

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Identifiers

DOI

10.12693/APhysPolA.115.521