Abstract
The objective of this experimental study was to evaluate the effect of twin layer solar tunnel drying on physicochemical quality of tomato slices. The novelty of this dryer is that it has two layers of trays unlike Hohenheim solar tunnel dryer which makes it to have drying capacity of more than two times compare to type hohenheim solar tunnel dryer with equal collector area. The experiment consists of two (tray position and drying position) factors with two levels of tray position (upper tray (samples exposed to direct solar radiation) and lower tray (samples are exposed to only heated air)) and three levels of drying position (collector out let,middle of the dryer and dryer out let) with three replications. During the experiment 180 kg of Tomato slices of Galilea variety with 5mm thickness were dried in the twin layer solar tunnel dryer. Data on physicochemical quality of tomato were collected and analyzed using SAS (version 9.2). software. From the experimental result; an increase in lycopene and phenolic content retention along the length of the dryer was observed while Vitamin C retention showed a decreasing trend. Large retention of total phenol, lycopene and beta carotene content were observed for the lower tray dried tomato slices compared to the upper tray dried ones. The water activity and PH values of the solar tunnel dried tomatoes were within the safe range from microbial growth, enzymatic and non-enzymatic browning. Compared to sun drying; solar tunnel dried tomatoes showed a much better nutrient retention for all quality parameters which is comparable with the data reported for energy intensive mechanical dryers.
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Claims 5
Claim · model-written summary
Lycopene and phenolic content retention increased along the length of the dryer.
- Taxon
- tomato
Solanum lycopersicumt0 - Treatment
- along the length of the dryere1
- Outcome
- lycopene and phenolic content retentione1
- Direction
- increasee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an increase in lycopene and phenolic content retention along the length of the dryer was observed while Vitamin C retention showed a decreasing trend”
t0“twin layer solar tunnel dried tomato slices”
Claim · model-written summary
Vitamin C retention decreased along the length of the dryer.
- Taxon
- tomatoSolanum lycopersicumt0
- Treatment
- along the length of the dryere1
- Outcome
- Vitamin C retentione1
- Direction
- decreasinge1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“an increase in lycopene and phenolic content retention along the length of the dryer was observed while Vitamin C retention showed a decreasing trend”
t0“twin layer solar tunnel dried tomato slices”
Claim · model-written summary
Lower tray dried tomato slices retained more total phenol, lycopene and beta carotene than upper tray dried slices.
Verbatim
e2“Large retention of total phenol, lycopene and beta carotene content were observed for the lower tray dried tomato slices compared to the upper tray dried ones”
Claim · model-written summary
Water activity and pH of solar tunnel dried tomatoes were within the safe range for microbial growth and browning.
- Taxon
- tomatoesSolanum lycopersicume3
- Outcome
- water activity and PH valuese3
- Qualifier
- within the safe rangee3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e3“The water activity and PH values of the solar tunnel dried tomatoes were within the safe range from microbial growth, enzymatic and non-enzymatic browning”
Claim · model-written summary
Solar tunnel dried tomatoes showed better nutrient retention than sun drying for all quality parameters.
- Taxon
- tomatoesSolanum lycopersicume4
- Treatment
- solar tunnel driede4
- Outcome
- nutrient retentione4
- Direction
- much bettere4
- Comparator
- sun dryinge5
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e4“solar tunnel dried tomatoes showed a much better nutrient retention for all quality parameters”
e5“Compared to sun drying”
The same questions in other papers
processing · nutrient: content · Solanum lycopersicum (tomato)Positive and negative results
6 papers in the same direction as this paper · 4 in the opposite direction
- no effect
- negative
- negative
7 papers more in this group
See all 11 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.