Abstract
Abstract The aim of this work was to investigate the effects of osmotic dehydration conditions on the properties of osmotically pre-treated dried apples. The scope of research included analysing the most important mass exchange coefficients, i.e. water loss, solid gain, reduced water content and water activity, as well as colour changes of the obtained dried product. In the study, apples were osmotically dehydrated in one of two 60% solutions: sucrose or sucrose with an addition of chokeberry juice concentrate, for 30 and 120 min, in temperatures of 40 and 60°C. Ultrasound was also used during the first 30 min of the dehydration process. After osmotic pre-treatment, apples were subjected to innovative convective drying with the puffing effect, and to freeze-drying. Temperature and dehydration time increased the effectiveness of mass exchange during osmotic dehydration. The addition of chokeberry juice concentrate to standard sucrose solution and the use of ultrasound did not change the value of solid gain and reduced water content. Water activity of the dried apple tissue was not significantly changed after osmotic dehydration, while changes in colour were significant.
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Claims 5
Claim · model-written summary
Higher temperature and longer dehydration increased mass exchange effectiveness.
- Taxon
- apples
Malus domesticat0 - Material
- Braeburnt0
- Treatment
- Temperature and dehydration timee0
- Outcome
- effectiveness of mass exchangee0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Temperature and dehydration time increased the effectiveness of mass exchange during osmotic dehydration”
t0“Braeburn variety apples”
Claim · model-written summary
Chokeberry juice concentrate did not change solid gain and reduced water content.
- Taxon
- applesMalus domesticat0
- Treatment
- addition of chokeberry juice concentratee0
- Outcome
- solid gain and reduced water contente0
- Direction
- did not changee0
- Comparator
- standard sucrose solutione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The addition of chokeberry juice concentrate to standard sucrose solution and the use of ultrasound did not change the value of solid gain and reduced water content”
t0“Braeburn variety apples”
Claim · model-written summary
Ultrasound did not change solid gain and reduced water content.
- Taxon
- applesMalus domesticat0
- Treatment
- use of ultrasounde0
- Outcome
- solid gain and reduced water contente0
- Direction
- did not changee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the use of ultrasound did not change the value of solid gain and reduced water content”
t0“Braeburn variety apples”
Claim · model-written summary
Osmotic dehydration did not significantly change dried apple tissue water activity.
- Taxon
- applesMalus domesticat0
- Treatment
- osmotic dehydratione0
- Outcome
- Water activity of the dried apple tissuee0
- Direction
- not significantly changede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Water activity of the dried apple tissue was not significantly changed after osmotic dehydration”
t0“Braeburn variety apples”
Claim · model-written summary
Colour changed significantly after osmotic dehydration.
- Taxon
- applesMalus domesticat0
- Treatment
- osmotic dehydratione0
- Outcome
- changes in coloure0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“after osmotic dehydration, while changes in colour were significant”
t0“Braeburn variety apples”
The same questions in other papers
physical treatment · soil: physics · Malus domestica (apple)Positive and negative results
2 in the opposite direction
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.