Modeling of hibiscus anthocyanins transport to apple tissue during ultrasound assisted vacuum impregnation

2021 ◽  
Author(s):  
Cüneyt Dinçer
Keyword(s):  
Vacuum Impregnation ◽  
Apple Tissue ◽  
Ultrasound Assisted

scholarly journals Studies on the Effect of Mass Transfer in Vacuum Impregnation on the Bioactive Potential of Apples

Molecules ◽  
2019 ◽  
Vol 24 (19) ◽  
pp. 3533 ◽  
Author(s):  
Marta Pasławska ◽  
Bogdan Stępień ◽  
Agnieszka Nawirska-Olszańska ◽  
Kinga Sala
Keyword(s):  
Mass Transfer ◽  
Antioxidant Capacity ◽  
Vacuum Impregnation ◽  
Process Conditions ◽  
Mass Variation ◽  
Polyphenol Content ◽  
Solid Gain ◽  
Vacuum Level ◽  
Apple Tissue ◽  
Bioactive Potential

The purpose of the study was to evaluate the efficiency of mass transfer during vacuum impregnation (VI) of apple tissue by different process conditions. VI was carried out in two stages: Vacuum (4, 6, or 8 kPa maintained at time 10, 20, 30, 40, 60, and 80 s) and atmospheric (4 min under atmospheric pressure). As infiltration liquids, fresh squeezed apple-pear juice (J), 3% citric acid solution (C), and distilled water (DW) were used. Mass transfer was analyzed based on three factors: Mass variation (MV), dry mass variation (DMV), and solid gain (SG). The outflow of native components and inflow of infiltration liquid has been described by mathematical models. The polyphenol content and antioxidant capacity (ABTS+, FRAP) were evaluated as the bioactive potential factors confirming native component outflow and incorporation of liquid molecules into an apple tissue. It was found that during VI of an apple tissue, intensive mass transfer occurred: Native components of fruit tissue outflowed and external ingredients of impregnation liquid inflowed into the material with the intensity proportional to the vacuum level and process time. The most beneficial conditions of apple cube VI were noticed at a vacuum level of 4 kPa for a minimum of 40 s, which is when the highest polyphenol content and antioxidant capacity occurred.

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.

Gas in Scattering Media Absorption Spectroscopy (GASMAS) Detected Persistent Vacuum in Apple Tissue After Vacuum Impregnation

2011 ◽  
Vol 7 (1) ◽  
pp. 28-34 ◽  
Author(s):  
Urszula Tylewicz ◽  
Patrik Lundin ◽  
Lorenzo Cocola ◽  
Katarzyna Dymek ◽  
Pietro Rocculi ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Vacuum Impregnation ◽  
Scattering Media ◽  
Apple Tissue

Incorporation of pectinmethylesterase in apple tissue either by soaking or by vacuum-impregnation

2006 ◽  
Vol 38 (5) ◽  
pp. 610-616 ◽  
Author(s):  
Anne Guillemin ◽  
Pascal Degraeve ◽  
Fabienne Guillon ◽  
Marc Lahaye ◽  
Rémi Saurel
Keyword(s):  
Vacuum Impregnation ◽  
Apple Tissue

Induction of Vesicle Formation by Exposing Apple Tissue to Vacuum Impregnation

2011 ◽  
Vol 6 (4) ◽  
pp. 1099-1104 ◽  
Author(s):  
Urszula Tylewicz ◽  
Santina Romani ◽  
Susanne Widell ◽  
Federico Gόmez Galindo
Keyword(s):  
Vacuum Impregnation ◽  
Vesicle Formation ◽  
Apple Tissue

The microstructure of functionalized poLyacrylonitrile beads for bioseparations

1990 ◽  
Vol 48 (4) ◽  
pp. 1094-1095
Author(s):  
Eduardo A. Kamenetzky ◽  
David A. Ley
Keyword(s):  
Aqueous Solution ◽  
Affinity Chromatography ◽  
Pore Size Distribution ◽  
Pore Size ◽  
Surface Coverage ◽  
Vacuum Impregnation ◽  
Thin Sections ◽  
Selective Staining ◽  
Low Viscosity ◽  
Diamond Knife

The microstructure of polyacrylonitrile (PAN) beads for affinity chromatography bioseparations was studied by TEM of stained ultramicrotomed thin-sections. Microstructural aspects such as overall pore size distribution, the distribution of pores within the beads, and surface coverage of functionalized beads affect performance properties. Stereological methods are used to quantify the internal structure of these chromatographic supports. Details of the process for making the PAN beads are given elsewhere. TEM specimens were obtained by vacuum impregnation with a low-viscosity epoxy and sectioning with a diamond knife. The beads can be observed unstained. However, different surface functionalities can be made evident by selective staining. Amide surface coverage was studied by staining in vapor of a 0.5.% RuO4 aqueous solution for 1 h. RuO4 does not stain PAN but stains, amongst many others, polymers containing an amide moiety.

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