Abstract
Abstract The aim of this work was to analyze the effect of different osmotic dehydration (OD) processes (sucrose, trehalose, glucose, and lactose) as a pretreatment for grape before exposure to freezing. The osmotic treatment had less effect on blueberry moisture content among different sugars. Impregnation with sugars decreases the freezing time of grapes, compared to untreated grapes. Trehalose and lactose had a remarkable effect on shortening the time for grapes to pass the zone of maximum crystallization of ice. It was concluded that drip loss and electrolyte permeability of cell membranes decreased and the soluble solids content increased after OD treatment. In addition, the firmness and L * values of trehalose‐treated grapes were significantly higher than those of other treatments ( p < .05). In summary, osmosis with a carbohydrate solution not only increased the freezing rate but improved quality characteristics of grapes after freezing and thawing. Practical applications Grapes are subject to freezing damage during storage, including significant water loss, berry softening, off flavor occurrence, which reduce the commodity and consumption of grapes. OD can improve the freezing rate by reducing the moisture content in the raw material and reducing the impact of freezing on the quality of fruits and vegetables, which may be beneficial to the process of freezing grapes.
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Claims 8
Claim · model-written summary
Sugar impregnation decreased grape freezing time relative to untreated grapes.
Verbatim
e0“Impregnation with sugars decreases the freezing time of grapes, compared to untreated grapes.”
Claim · model-written summary
Trehalose shortened the time grapes took to pass the maximum ice crystallization zone.
- Taxon
- grapese0
- Treatment
- Trehalosee0
- Outcome
- time for grapes to pass the zone of maximum crystallization of icee0
- Direction
- shorteninge0
Not reportedComparator
Verbatim
e0“Trehalose and lactose had a remarkable effect on shortening the time for grapes to pass the zone of maximum crystallization of ice.”
Claim · model-written summary
lactose shortened the time grapes took to pass the maximum ice crystallization zone.
- Taxon
- grapese0
- Treatment
- lactosee0
- Outcome
- time for grapes to pass the zone of maximum crystallization of icee0
- Direction
- shorteninge0
Not reportedComparator
Verbatim
e0“Trehalose and lactose had a remarkable effect on shortening the time for grapes to pass the zone of maximum crystallization of ice.”
Claim · model-written summary
OD treatment decreased grape drip loss.
Not reportedComparator
Verbatim
e0“drip loss and electrolyte permeability of cell membranes decreased and the soluble solids content increased after OD treatment.”
t0“grape”
Claim · model-written summary
OD treatment decreased grape electrolyte permeability of cell membranes.
- Taxon
- grapet0
- Treatment
- OD treatmente0
- Outcome
- electrolyte permeability of cell membranese0
- Direction
- decreasede0
Not reportedComparator
Verbatim
e0“drip loss and electrolyte permeability of cell membranes decreased and the soluble solids content increased after OD treatment.”
t0“grape”
Claim · model-written summary
OD treatment increased grape soluble solids content.
Not reportedComparator
Verbatim
e0“drip loss and electrolyte permeability of cell membranes decreased and the soluble solids content increased after OD treatment.”
t0“grape”
Claim · model-written summary
Trehalose treatment gave grapes higher firmness than other treatments.
Verbatim
e0“the firmness and L * values of trehalose‐treated grapes were significantly higher than those of other treatments ( p < .05)”
Claim · model-written summary
Trehalose treatment gave grapes higher L * values than other treatments.
Verbatim
e0“the firmness and L * values of trehalose‐treated grapes were significantly higher than those of other treatments ( p < .05)”
The same questions in other papers
drought · quality: sugar starch · VitisResults differ
9 papers in the same direction as this paper · 10 in the opposite direction · 1 reporting no difference from an alternative
- negative
- negative
- no effect
17 papers more in this group
See all 21 papers →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.