Initial Phases of Antarctic Ramalina terebrata Hook f. & Taylor Thalli Rehydration Observed by Proton Relaxometry

• Authors: H. Harańczyk , Ł. Pater , P. Nowak , M. Bacior , M. Olech
• Languages of publication: EN

Abstracts

EN

Hydration kinetics, sorption isotherm, and proton free induction decays are measured for Ramalina terebrata thalli rehydrated from gaseous phase. Very tightly, tightly, and loosely bound water fractions are distinguished. Sorption isotherm is sigmoidal in form with the mass of water saturating primary water binding sites equal to Δ m/m_0 = 0.046. Proton free induction decays show the presence of immobilized water fraction (T_{2 L_1}* ≈ 100 μs) and mobile water pool (T_{2 L_2}* ≈ 330 μs). Sorption isotherm fitted to the NMR data shows the absence of water fraction "sealed" in pores of dry thallus.

Keywords

EN

82.56.Na

Discipline

• 82.56.Na: Relaxation

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 121
• Issue: 2
• Pages: 480-484

Dates

published

2012-02

Contributors

author

H. Harańczyk

• Institute of Physics, Jagiellonian University, W.S. Reymonta 4,30-059 Kraków, Poland

author

Ł. Pater

• Institute of Physics, Jagiellonian University, W.S. Reymonta 4,30-059 Kraków, Poland

author

P. Nowak

• Institute of Physics, Jagiellonian University, W.S. Reymonta 4,30-059 Kraków, Poland

author

M. Bacior

• Institute of Physics, Jagiellonian University, W.S. Reymonta 4,30-059 Kraków, Poland

author

M. Olech

• Institute of Botany, Jagiellonian University, M. Kopernika 27, 31-501 Kraków, Poland

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Identifiers

DOI

10.12693/APhysPolA.121.480