Abstract
Purpose This work was undertaken to evaluate the impact of different drying methods (convective, microwave and freeze drying) on color, selected secondary metabolites (total phenolic substances, ascorbic acid, beta-carotene and antioxidant capacity), texture (hardness), sensory properties and microstructure of carrot slices. Design/methodology/approach Convective drying at three different temperatures (55, 65 and 75 °C), microwave drying at two different power levels (100 and 200 W) and freeze drying were applied. Findings Significant differences were found among fresh and dried-carrot slices. Convective-dried carrots showed better quality characteristics in comparison with microwave-dried carrots. The convective-dried carrots at 65 °C exhibited the highest retention of bioactive compounds and best color among all convective drying conditions. The microwave-dried carrot slices at lower power (100 W) showed higher quality characteristics compared to the dried carrots at 200 W. The freeze-dried carrots exhibited the highest retention of secondary metabolites, sensory properties and best color among all drying methods. Originality/value The results from this study are significant for the processing of dried carrots by optimizing the conditions to obtain a high-quality product. Overall, freeze drying is a promising application as shown in the present study by its capability to better retention carrot quality underlying color, sensory, texture, microstructure and secondary metabolites.
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Claims 5
Claim · model-written summary
Fresh and dried carrot slices differed significantly.
- Taxon
- carrot
Daucus carotae0 - Outcome
- differencese0
- Comparator
- fresh and dried-carrot slicese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant differences were found among fresh and dried-carrot slices.”
Claim · model-written summary
Convective-dried carrots had better quality than microwave-dried carrots.
- Taxon
- carrotsDaucus carotae0
- Treatment
- Convective-driede0
- Outcome
- quality characteristicse0
- Direction
- bettere0
- Comparator
- microwave-dried carrotse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Convective-dried carrots showed better quality characteristics in comparison with microwave-dried carrots.”
Claim · model-written summary
Convective drying at 65 °C gave the highest bioactive-compound retention and best color among convective conditions.
- Taxon
- carrotsDaucus carotae0
- Treatment
- convective-dried carrots at 65 °Ce0
- Outcome
- retention of bioactive compounds and best colore0
- Direction
- higheste0
- Comparator
- all convective drying conditionse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The convective-dried carrots at 65 °C exhibited the highest retention of bioactive compounds and best color among all convective drying conditions.”
Claim · model-written summary
Microwave drying at 100 W produced higher quality than 200 W.
- Taxon
- carrotDaucus carotae0
- Treatment
- lower power (100 W)e0
- Outcome
- quality characteristicse0
- Direction
- highere0
- Comparator
- 200 We0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The microwave-dried carrot slices at lower power (100 W) showed higher quality characteristics compared to the dried carrots at 200 W.”
Claim · model-written summary
Freeze-dried carrots had the highest retention of secondary metabolites, sensory properties and best color across methods.
- Taxon
- carrotsDaucus carotae0
- Treatment
- freeze-driede0
- Outcome
- retention of secondary metabolites, sensory properties and best colore0
- Direction
- higheste0
- Comparator
- all drying methodse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The freeze-dried carrots exhibited the highest retention of secondary metabolites, sensory properties and best color among all drying methods.”
The same questions in other papers
cold · quality: phytochemicals · Daucus carota (carrot)Positive and negative results
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- negative
- negative
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.