Abstract
Abstract An alternating current high electric field (HEF) of 430 kV/m generated by multiple point-to-plate-electrodes was used to dry spinach (Spinacia oleracea L). Point electrodes distributed above a layer of fresh spinach were effective in removing moisture. Drying continuously for 7 h removed 80.1% of the total moisture compared with 79.8% and 19.3% when dried in an oven (60°C) and in ambient air (25°C), respectively. The Hunter 'a' value for HEF-dried samples maintained most of the original green color compared with oven-drying, during which the spinach turned brown. Total chlorophyll (Chl), Chl a and Chl b contents in spinach were substantially higher after HEF-drying than oven-drying. The ascorbic acid content after six weeks of storage of the dried material was almost three times higher in HEF-dried samples than those oven-dried. HPLC determinations of organic acids and sugars indicated no formation of by-products in post-HEF-dried spinach. Keywords: HPLCNon-thermal dryingOrganic acidsSugarsAscorbic acidChlorophyll Acknowledgments
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Claims 6
Claim · model-written summary
Point electrodes removed moisture from fresh spinach.
- Taxon
- spinach
Spinacia oleraceae0 - Outcome
- removing moisturee0
Not reportedComparatorValue
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Point electrodes distributed above a layer of fresh spinach were effective in removing moisture.”
Claim · model-written summary
Seven hours of HEF drying removed 80.1% total moisture versus 79.8% in an oven and 19.3% in ambient air.
- Taxon
- spinachSpinacia oleraceat0
- Treatment
- Drying continuously for 7 he0
- Outcome
- total moisturee0
- Direction
- removede0
- Value
- 80.1%e0
- Qualifier
- 79.8% and 19.3%e0
- Comparator
- an oven (60°C) and in ambient air (25°C)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Drying continuously for 7 h removed 80.1% of the total moisture compared with 79.8% and 19.3% when dried in an oven (60°C) and in ambient air (25°C), respectively.”
t0“SPINACH”
Claim · model-written summary
HEF drying retained more original green color than oven drying.
- Taxon
- spinachSpinacia oleraceae0
- Treatment
- HEF-driede0
- Outcome
- Hunter 'a' valuee0
- Direction
- maintainede0
- Comparator
- oven-dryinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The Hunter 'a' value for HEF-dried samples maintained most of the original green color compared with oven-drying, during which the spinach turned brown.”
Claim · model-written summary
Total chlorophyll, chlorophyll a, and chlorophyll b were higher after HEF drying than oven drying.
- Taxon
- spinachSpinacia oleraceae0
- Treatment
- HEF-dryinge0
- Outcome
- Total chlorophyll (Chl), Chl a and Chl b contentse0
- Direction
- highere0
- Comparator
- oven-dryinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Total chlorophyll (Chl), Chl a and Chl b contents in spinach were substantially higher after HEF-drying than oven-drying.”
Claim · model-written summary
After six weeks, ascorbic acid was almost three times higher in HEF dried material than oven dried material.
- Taxon
- spinachSpinacia oleraceat0
- Treatment
- HEF-driede0
- Outcome
- ascorbic acid contente0
- Direction
- highere0
- Value
- almost three timese0
- Qualifier
- after six weeks of storagee0
- Comparator
- oven-driede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The ascorbic acid content after six weeks of storage of the dried material was almost three times higher in HEF-dried samples than those oven-dried.”
t0“SPINACH”
Claim · model-written summary
HPLC found no byproducts in HEF dried spinach.
- Taxon
- spinachSpinacia oleraceae0
- Treatment
- post-HEF-driede0
- Outcome
- no formation of by-productse0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“HPLC determinations of organic acids and sugars indicated no formation of by-products in post-HEF-dried spinach.”
The same questions in other papers
processing · soil: physics · Spinacia oleracea (spinach)Results agree
2 papers in the same direction as this paper
- 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.