Modification of Transverse NMR Relaxation Times and Water Diffusion Coefficients of Kiwifruit Pericarp Tissue Subjected to Osmotic Dehydration

The objective of the present study was to evaluate cellular compartment modifications of kiwifruit (Actinidia deliciosa) outer pericarp tissue caused by osmotic treatment in a 61. 5 % sucrose solution, through the quantification of transverse relaxation time (T2) and water self-diffusion coefficient...

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Autores principales: Santagapita, P., Laghi, L., Panarese, V., Tylewicz, U., Rocculi, P., Rosa, M.D.
Formato: JOUR
Materias:
Diffusion coefficient
Kiwifruit
Low field nuclear magnetic resonance (LF-NMR)
Osmotic dehydration
Transverse relaxation time
Cellular compartments
Kiwifruits
Low field nuclear magnetic resonance
Multiple components
Water diffusion coefficients
Water self diffusions
Dehydration
Diffusion
Diffusion in liquids
Nuclear magnetic resonance
Protons
Relaxation time
Tissue
Osmosis
Actinidia deliciosa
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_19355130_v6_n6_p1434_Santagapita
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_19355130_v6_n6_p1434_Santagapita
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spelling todo:paper_19355130_v6_n6_p1434_Santagapita2023-10-03T16:36:30Z Modification of Transverse NMR Relaxation Times and Water Diffusion Coefficients of Kiwifruit Pericarp Tissue Subjected to Osmotic Dehydration Santagapita, P. Laghi, L. Panarese, V. Tylewicz, U. Rocculi, P. Rosa, M.D. Diffusion coefficient Kiwifruit Low field nuclear magnetic resonance (LF-NMR) Osmotic dehydration Transverse relaxation time Cellular compartments Kiwifruits Low field nuclear magnetic resonance Multiple components Osmotic dehydration Transverse relaxation time Water diffusion coefficients Water self diffusions Dehydration Diffusion Diffusion in liquids Nuclear magnetic resonance Protons Relaxation time Tissue Osmosis Actinidia deliciosa The objective of the present study was to evaluate cellular compartment modifications of kiwifruit (Actinidia deliciosa) outer pericarp tissue caused by osmotic treatment in a 61. 5 % sucrose solution, through the quantification of transverse relaxation time (T2) and water self-diffusion coefficient (Dw) obtained by low field nuclear magnetic resonance means. Raw material ripening stage was taken into account as an osmotic dehydration (OD) process variable by analyzing two different kiwifruit groups, low (LB) and high (HB) °Brix. Three T2 values were obtained of about 20, 310, and 1,250 ms, which could be ascribed to the proton populations, located in the cell walls, in the cytoplasm/extracellular space, and in the vacuoles, respectively. According to T2 intensity values, vacuole protons represented between 47 and 60 % of the total kiwifruit protons, for LB and HB kiwifruits, respectively. The leakage of water leading to vacuole shrinkage seemed to cause concentration of solutes, retained by the tonoplast, making the vacuole T2 value decrease along the OD. As expected, the Dw values of raw kiwifruits were lower than the value of the free pure water. The water mobility (and hence Dw), depending on the kiwifruit distinctive cellular structures and solutes, decreased even more during OD due to water loss and sugar gain phenomena. Dw represents an average value of the diffusion coefficient of the whole kiwifruit tissue protons. In order to obtain Dw values specific for each cellular compartment, a multiple component model fitting was also used. According to these results, the vacuole water self-diffusion coefficient (Dw,v) was much higher than Dw. © 2012 Springer Science+Business Media, LLC. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_19355130_v6_n6_p1434_Santagapita
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Diffusion coefficient
Kiwifruit
Low field nuclear magnetic resonance (LF-NMR)
Osmotic dehydration
Transverse relaxation time
Cellular compartments
Kiwifruits
Low field nuclear magnetic resonance
Multiple components
Osmotic dehydration
Transverse relaxation time
Water diffusion coefficients
Water self diffusions
Dehydration
Diffusion
Diffusion in liquids
Nuclear magnetic resonance
Protons
Relaxation time
Tissue
Osmosis
Actinidia deliciosa
spellingShingle Diffusion coefficient
Kiwifruit
Low field nuclear magnetic resonance (LF-NMR)
Osmotic dehydration
Transverse relaxation time
Cellular compartments
Kiwifruits
Low field nuclear magnetic resonance
Multiple components
Osmotic dehydration
Transverse relaxation time
Water diffusion coefficients
Water self diffusions
Dehydration
Diffusion
Diffusion in liquids
Nuclear magnetic resonance
Protons
Relaxation time
Tissue
Osmosis
Actinidia deliciosa
Santagapita, P.
Laghi, L.
Panarese, V.
Tylewicz, U.
Rocculi, P.
Rosa, M.D.
Modification of Transverse NMR Relaxation Times and Water Diffusion Coefficients of Kiwifruit Pericarp Tissue Subjected to Osmotic Dehydration
topic_facet Diffusion coefficient
Kiwifruit
Low field nuclear magnetic resonance (LF-NMR)
Osmotic dehydration
Transverse relaxation time
Cellular compartments
Kiwifruits
Low field nuclear magnetic resonance
Multiple components
Osmotic dehydration
Transverse relaxation time
Water diffusion coefficients
Water self diffusions
Dehydration
Diffusion
Diffusion in liquids
Nuclear magnetic resonance
Protons
Relaxation time
Tissue
Osmosis
Actinidia deliciosa
description The objective of the present study was to evaluate cellular compartment modifications of kiwifruit (Actinidia deliciosa) outer pericarp tissue caused by osmotic treatment in a 61. 5 % sucrose solution, through the quantification of transverse relaxation time (T2) and water self-diffusion coefficient (Dw) obtained by low field nuclear magnetic resonance means. Raw material ripening stage was taken into account as an osmotic dehydration (OD) process variable by analyzing two different kiwifruit groups, low (LB) and high (HB) °Brix. Three T2 values were obtained of about 20, 310, and 1,250 ms, which could be ascribed to the proton populations, located in the cell walls, in the cytoplasm/extracellular space, and in the vacuoles, respectively. According to T2 intensity values, vacuole protons represented between 47 and 60 % of the total kiwifruit protons, for LB and HB kiwifruits, respectively. The leakage of water leading to vacuole shrinkage seemed to cause concentration of solutes, retained by the tonoplast, making the vacuole T2 value decrease along the OD. As expected, the Dw values of raw kiwifruits were lower than the value of the free pure water. The water mobility (and hence Dw), depending on the kiwifruit distinctive cellular structures and solutes, decreased even more during OD due to water loss and sugar gain phenomena. Dw represents an average value of the diffusion coefficient of the whole kiwifruit tissue protons. In order to obtain Dw values specific for each cellular compartment, a multiple component model fitting was also used. According to these results, the vacuole water self-diffusion coefficient (Dw,v) was much higher than Dw. © 2012 Springer Science+Business Media, LLC.
format JOUR
author Santagapita, P.
Laghi, L.
Panarese, V.
Tylewicz, U.
Rocculi, P.
Rosa, M.D.
author_facet Santagapita, P.
Laghi, L.
Panarese, V.
Tylewicz, U.
Rocculi, P.
Rosa, M.D.
author_sort Santagapita, P.
title Modification of Transverse NMR Relaxation Times and Water Diffusion Coefficients of Kiwifruit Pericarp Tissue Subjected to Osmotic Dehydration
title_short Modification of Transverse NMR Relaxation Times and Water Diffusion Coefficients of Kiwifruit Pericarp Tissue Subjected to Osmotic Dehydration
title_full Modification of Transverse NMR Relaxation Times and Water Diffusion Coefficients of Kiwifruit Pericarp Tissue Subjected to Osmotic Dehydration
title_fullStr Modification of Transverse NMR Relaxation Times and Water Diffusion Coefficients of Kiwifruit Pericarp Tissue Subjected to Osmotic Dehydration
title_full_unstemmed Modification of Transverse NMR Relaxation Times and Water Diffusion Coefficients of Kiwifruit Pericarp Tissue Subjected to Osmotic Dehydration
title_sort modification of transverse nmr relaxation times and water diffusion coefficients of kiwifruit pericarp tissue subjected to osmotic dehydration
url http://hdl.handle.net/20.500.12110/paper_19355130_v6_n6_p1434_Santagapita
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