scholarly journals Application of microwaves dielectric spectroscopy for controlling long time osmotic dehydration of parenchymatic apple tissue

2011 ◽  
Vol 104 (2) ◽  
pp. 227-233 ◽  
Author(s):  
M. Castro-Giráldez ◽  
P.J. Fito ◽  
P. Fito
Keyword(s):  
Dielectric Spectroscopy ◽  
Osmotic Dehydration ◽  
Long Time ◽  
Apple Tissue

scholarly journals Ultrasound-Assisted Osmotic Dehydration of Apples in Polyols and Dihydroxyacetone (DHA) Solutions

Molecules ◽  
2019 ◽  
Vol 24 (19) ◽  
pp. 3429 ◽  
Author(s):  
Joanna Cichowska ◽  
Dorota Witrowa-Rajchert ◽  
Lidia Stasiak-Różańska ◽  
Adam Figiel
Keyword(s):  
Water Activity ◽  
Sucrose Solution ◽  
Osmotic Dehydration ◽  
Continuous Method ◽  
The Other ◽  
Water Removal ◽  
Colour Changes ◽  
Apple Tissue ◽  
Transfer Parameters ◽  
Ultrasound Assisted

The aim of this work was to analyse the effect of ultrasound-assisted osmotic dehydration of apples v. Elise on mass transfer parameters, water activity, and colour changes. Ultrasound treatment was performed at a frequency of 21 kHz with a temperature of 40 °C for 30–180 min using four osmotic solutions: 30% concentrated syrups of erythritol, xylitol, maltitol, and dihydroxyacetone (DHA). The efficiency of the used solutes from the polyol groups was compared to reference dehydration in 50% concentrated sucrose solution. Peleg’s model was used to fit experimental data. Erythritol, xylitol, and DHA solutions showed similar efficiency to sucrose and good water removal properties in compared values of true water loss. The application of ultrasound by two methods was in most cases unnoticeable and weaker than was expected. On the other hand, sonication by the continuous method allowed for a significant reduction in water activity in apple tissue in all tested solutions.

Changes in Structure, Rheology, and Water Mobility of Apple Tissue Induced by Osmotic Dehydration with Glucose or Trehalose

2011 ◽  
Vol 5 (8) ◽  
pp. 3075-3089 ◽  
Author(s):  
Sebastián Vicente ◽  
Andrea B. Nieto ◽  
Karina Hodara ◽  
María A. Castro ◽  
Stella M. Alzamora
Keyword(s):  
Osmotic Dehydration ◽  
Water Mobility ◽  
Apple Tissue

Calcium and ascorbic acid affect cellular structure and water mobility in apple tissue during osmotic dehydration in sucrose solutions

2016 ◽  
Vol 195 ◽  
pp. 19-28 ◽  
Author(s):  
Maria A. Mauro ◽  
Nicolò Dellarosa ◽  
Urszula Tylewicz ◽  
Silvia Tappi ◽  
Luca Laghi ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Cellular Structure ◽  
Osmotic Dehydration ◽  
Water Mobility ◽  
Sucrose Solutions ◽  
Apple Tissue

EQUILIBRATION OF APPLE TISSUE IN OSMOTIC DEHYDRATION: MICROSTRUCTURAL CHANGES

1999 ◽  
Vol 17 (7-8) ◽  
pp. 1375-1386 ◽  
Author(s):  
J. M. Barat ◽  
A. Albors ◽  
A. Chiralt ◽  
P. Fito
Keyword(s):  
Osmotic Dehydration ◽  
Microstructural Changes ◽  
Apple Tissue

scholarly journals Dielectric Spectroscopy Using Dual Reflection Analysis of TDR Signals

Sensors ◽  
2019 ◽  
Vol 19 (6) ◽  
pp. 1299 ◽  
Author(s):  
Yin Ngui ◽  
Chih-Ping Lin ◽  
Tsai-Jung Wu
Keyword(s):  
Dielectric Spectroscopy ◽  
Time Window ◽  
Waveform Inversion ◽  
Input Function ◽  
Time Domain Reflectometry ◽  
Effective Bandwidth ◽  
Model Free ◽  
Robust Model ◽  
Long Time ◽  
Apparent Dielectric Constant

Time-domain reflectometry (TDR) has been a powerful tool for measuring soil dielectric properties. Initiating from apparent dielectric constant ( K a ) measurement up until apparent and complex dielectric spectroscopies, the embedded information in the TDR signal can be extracted to inspire our understanding of the underlying dielectric behaviors. Multiple full waveform inversion techniques have been developed to extract complex dielectric permittivity (CDP) spectrum, but most of them involved prior knowledge of input function and tedious calibration. This rendered the field dielectric spectroscopy challenging and expensive to conduct. Dual reflection analysis (DRA) is proposed in this study to measure CDP spectrum from 10 MHz to 1 GHz. DRA is a simple, robust, model-free, and source-function free algorithm which requires minimal calibration effort. The theoretical framework of DRA is established and the necessary signal processing procedures are elaborated in this study. Eight materials with different dielectric characteristics are selected to evaluate DRA’s performance, by using both simulated and experimental signals. DRA is capable of measuring non-dispersive materials very well, whereas dispersive materials require the assistance of a long-time-window (LTW) extraction method to further extend the effective bandwidth. The DRA approach is suitable for field applications that can only record a limited amount of data points and in-situ dielectric spectroscopy.

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