Abstract
The nutrients and bioactive compounds retention of cowpea (Vigna unguiculata (L). Walp) leaves subjected to the two traditional processing methods of sun drying and a combination of boiling and sun drying was investigated. Findings revealed that the retention of carbohydrates (92.72%), proteins (97.41%) and ash (92.39%) was significantly higher among samples that were subjected to sun drying alone, than samples subjected to boiling and sun drying. Considerable reduction in lipids content of sun dried samples (20.24%) and boiled and sundried samples (17.16%) were registered. Significant (p < 0.05) loss of bioactive compounds was registered when fresh leaves were subjected to the two processing methods. For example only 7.13% and 8% of -carotene was retained in boiled and sun-dried samples and in sun dried samples, respectively. Insignificant effect on minerals was observed with more than 92% of Fe, Ca and Zn retained in sun dried and in boiled and sun dried leaves. The study demonstrated that subjecting cowpea leaves to sun drying and a combination of boiling and sun drying, leads to insignificant loss of carbohydrates and proteins but leads to the loss of bioactive compounds. The two processing techniques had insignificant effect on minerals contents. The study results show that drying could be considered for cowpeas preservation, which would contribute to ensuring all year availability of the vegetable.
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Claims 10
Claim · model-written summary
Sun drying retained 92.72% carbohydrates, significantly more than boiling plus drying.
- Taxon
- cowpea
Vigna unguiculatat0 - Treatment
- sun drying alonee0
- Outcome
- carbohydratese0
- Direction
- highere0
- Value
- 92.72%e0
- Comparator
- boiling and sun dryinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“retention of carbohydrates (92.72%), proteins (97.41%) and ash (92.39%) was significantly higher among samples that were subjected to sun drying alone, than samples subjected to boiling and sun drying”
t0“cowpea”
Claim · model-written summary
Sun drying retained 97.41% proteins, significantly more than boiling plus drying.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- sun drying alonee0
- Outcome
- proteinse0
- Direction
- highere0
- Value
- 97.41%e0
- Comparator
- boiling and sun dryinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“retention of carbohydrates (92.72%), proteins (97.41%) and ash (92.39%) was significantly higher among samples that were subjected to sun drying alone, than samples subjected to boiling and sun drying”
t0“cowpea”
Claim · model-written summary
Sun drying retained 92.39% ash, significantly more than boiling plus drying.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- sun drying alonee0
- Outcome
- ashe0
- Direction
- highere0
- Value
- 92.39%e0
- Comparator
- boiling and sun dryinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“retention of carbohydrates (92.72%), proteins (97.41%) and ash (92.39%) was significantly higher among samples that were subjected to sun drying alone, than samples subjected to boiling and sun drying”
t0“cowpea”
Claim · model-written summary
Sun dried samples had 20.24% lipid reduction.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- sun driede0
- Outcome
- lipids contente0
- Direction
- reductione0
- Value
- 20.24%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Considerable reduction in lipids content of sun dried samples (20.24%) and boiled and sundried samples (17.16%) were registered”
t0“cowpea”
Claim · model-written summary
Boiled and sun dried samples had 17.16% lipid reduction.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- boiled and sundriede0
- Outcome
- lipids contente0
- Direction
- reductione0
- Value
- 17.16%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Considerable reduction in lipids content of sun dried samples (20.24%) and boiled and sundried samples (17.16%) were registered”
t0“cowpea”
Claim · model-written summary
Both processing methods significantly reduced bioactive compounds.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- the two processing methodse0
- Outcome
- bioactive compoundse0
- Direction
- losse0
- Value
- p < 0.05e0
- Comparator
- fresh leavese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Significant (p < 0.05) loss of bioactive compounds was registered when fresh leaves were subjected to the two processing methods”
t0“cowpea”
Claim · model-written summary
Boiling and sun drying retained 7.13% of carotene.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- boiled and sun-driede0
- Outcome
- -carotenee0
- Direction
- lowerinferrede0
- Value
- 7.13%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only 7.13% and 8% of -carotene was retained in boiled and sun-dried samples and in sun dried samples, respectively”
t0“cowpea”
Claim · model-written summary
Sun drying retained 8% of carotene.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- sun driede0
- Outcome
- -carotenee0
- Direction
- lowerinferrede0
- Value
- 8%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“only 7.13% and 8% of -carotene was retained in boiled and sun-dried samples and in sun dried samples, respectively”
t0“cowpea”
Claim · model-written summary
Both processes retained more than 92% of Fe, Ca, and Zn without a significant effect.
- Taxon
- cowpeaVigna unguiculatat0
- Treatment
- sun dried and in boiled and sun driede0
- Outcome
- Fe, Ca and Zne0
- Direction
- Insignificant effecte0
- Value
- more than 92%e0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Insignificant effect on minerals was observed with more than 92% of Fe, Ca and Zn retained in sun dried and in boiled and sun dried leaves”
t0“cowpea”
Claim · model-written summary
The authors suggest drying for cowpea preservation and year-round availability.
- Taxon
- cowpeasVigna unguiculatae0
- Outcome
- drying could be considered for cowpeas preservatione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“drying could be considered for cowpeas preservation, which would contribute to ensuring all year availability of the vegetable”
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