Paper · 1993 · Journal of the Science of Food and Agriculture

Physicochemical properties and cooking quality of four new cultivars of Nigerian cowpea (Vigna unguiculata L walp)

Sunday Y. Giami; Uzodima I. Okwechime

10
claims
20
verbatim quotes
29
citations
3
research areas
—
Not open access

Abstract

Abstract Four new cowpea cultivars (IT81D‐699, IT82E‐18, IT84S‐2246‐4 and TVx 3236) were evaluated for their physicochemical properties and cooking quality. The four cultivars fell into two categories (rough and smooth) according to testa texture, and varied in seed dimensions and weights with IT81D‐699 and IT84S‐2246‐4 having smaller seed volume than IT82E‐18 and TVx 3236. Leached solids, swelling capacity and seed coat percentage were within a range of 0·33–0·94 g per 100g, 77·0–123·5 g per 100 g and 5·6–15·7% w/w of dry beans respectively. The total polyphenol content of the brown or cream‐coloured beans were similar (1·53–1·96 mg g −1 ) but higher than the amount (1·03 mg g −1 ) found in the white bean. Cooking time varied between 29 and 37 min and was reduced by about 21% following a presoaking treatment in water for 12 h at room temperature (28 °C). Cooking time was significantly positively correlated ( P < 0·05) with seed weight ( r = 0·82) and seed volume ( r = 0·75). Water absorption was not related to cooking time, and was much lower for the cultivar with larger seeds. No significant difference in hardness was found between unsoaked beans cooked for 30 min and soaked beans cooked for 10 min, suggesting that cookability for all cultivars was improved through soaking.

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Claims 10

Observationobservedoriginal resultmeasured

Claim · model-written summary

The four cowpea cultivars fell into rough and smooth categories according to testa texture.

Outcome
testa texturee0
Qualifier
rough and smoothe0

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“four new cultivars of Nigerian cowpea”

✓ located verbatim in the source · title, characters 50–87 · show in text ↑
e0

“The four cultivars fell into two categories (rough and smooth) according to testa texture”

✓ located verbatim in the source · abstract, characters 157–246 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

IT81D‐699 and IT84S‐2246‐4 had smaller seed volume than IT82E‐18 and TVx 3236.

Material
IT81D‐699 and IT84S‐2246‐4e1
Outcome
seed volumee1
Direction
smallere1
Comparator
IT82E‐18 and TVx 3236e1

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“four new cultivars of Nigerian cowpea”

✓ located verbatim in the source · title, characters 50–87 · show in text ↑
e1

“IT81D‐699 and IT84S‐2246‐4 having smaller seed volume than IT82E‐18 and TVx 3236”

✓ located verbatim in the source · abstract, characters 295–375 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Total polyphenol content of brown or cream-coloured cowpea beans was higher than that of white beans.

Material
brown or cream‐coloured beanse2
Outcome
total polyphenol contente2
Direction
highere2
Value
1·53–1·96 mg g −1e2
Comparator
white beane2

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“four new cultivars of Nigerian cowpea”

✓ located verbatim in the source · title, characters 50–87 · show in text ↑
e2

“The total polyphenol content of the brown or cream‐coloured beans were similar (1·53–1·96 mg g −1 ) but higher than the amount (1·03 mg g −1 ) found in the white bean”

✓ located verbatim in the source · abstract, characters 549–715 · show in text ↑
Intervention effectobservedoriginal resultpositivemeasured

Claim · model-written summary

Presoaking in water for 12 h at room temperature reduced cooking time by about 21%.

Treatment
presoaking treatment in water for 12 h at room temperaturee3
Outcome
cooking timee3
Direction
reducede3
Value
about 21%e3
Setting
room temperaturee3

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“four new cultivars of Nigerian cowpea”

✓ located verbatim in the source · title, characters 50–87 · show in text ↑
e3

“Cooking time varied between 29 and 37 min and was reduced by about 21% following a presoaking treatment in water for 12 h at room temperature”

✓ located verbatim in the source · abstract, characters 717–858 · show in text ↑
Associationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Cooking time was significantly positively correlated with seed weight in cowpea (r = 0·82).

Treatment
seed weighte4
Outcome
cooking timee4
Direction
positively correlatede4
Value
r = 0·82e4

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“four new cultivars of Nigerian cowpea”

✓ located verbatim in the source · title, characters 50–87 · show in text ↑
e4

“Cooking time was significantly positively correlated ( P < 0·05) with seed weight ( r = 0·82) and seed volume ( r = 0·75)”

✓ located verbatim in the source · abstract, characters 868–989 · show in text ↑
Associationobservedoriginal resultsignificant (as stated)measured

Claim · model-written summary

Cooking time was significantly positively correlated with seed volume in cowpea (r = 0·75).

Treatment
seed volumee4
Outcome
cooking timee4
Direction
positively correlatede4
Value
r = 0·75e4

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“four new cultivars of Nigerian cowpea”

✓ located verbatim in the source · title, characters 50–87 · show in text ↑
e4

“Cooking time was significantly positively correlated ( P < 0·05) with seed weight ( r = 0·82) and seed volume ( r = 0·75)”

✓ located verbatim in the source · abstract, characters 868–989 · show in text ↑
Associationobservedoriginal resultno effectmeasured

Claim · model-written summary

Water absorption was not related to cooking time in cowpea.

Treatment
Water absorptione5
Outcome
cooking timee5
Direction
not relatede5

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“four new cultivars of Nigerian cowpea”

✓ located verbatim in the source · title, characters 50–87 · show in text ↑
e5

“Water absorption was not related to cooking time, and was much lower for the cultivar with larger seeds”

✓ located verbatim in the source · abstract, characters 991–1094 · show in text ↑
Observationobservedoriginal resultmeasured

Claim · model-written summary

Water absorption was much lower in the cowpea cultivar with larger seeds.

Material
cultivar with larger seedse5
Outcome
water absorptione5
Direction
much lowere5

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“four new cultivars of Nigerian cowpea”

✓ located verbatim in the source · title, characters 50–87 · show in text ↑
e5

“Water absorption was not related to cooking time, and was much lower for the cultivar with larger seeds”

✓ located verbatim in the source · abstract, characters 991–1094 · show in text ↑
Intervention effectobservedoriginal resultno effectnot significant (as stated)measured

Claim · model-written summary

Hardness did not differ significantly between unsoaked beans cooked for 30 min and soaked beans cooked for 10 min.

Treatment
soaked beans cooked for 10 mine6
Outcome
hardnesse6
Direction
No significant differencee6
Comparator
unsoaked beans cooked for 30 mine6

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“four new cultivars of Nigerian cowpea”

✓ located verbatim in the source · title, characters 50–87 · show in text ↑
e6

“No significant difference in hardness was found between unsoaked beans cooked for 30 min and soaked beans cooked for 10 min, suggesting that cookability for all cultivars was improved through soaking”

✓ located verbatim in the source · abstract, characters 1096–1295 · show in text ↑
Intervention effectauthor interpretationoriginal resultpositivemeasured

Claim · model-written summary

Soaking is suggested to improve cookability of all cowpea cultivars.

Treatment
soakinge6
Outcome
cookabilitye6
Direction
improvede6

Not reportedComparator

Organisms pictured · Representative pictures of the matched species, not figures from the paper.

Vigna unguiculata
Vigna unguiculata · TaxonHeraldDesa at English Wikipedia · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

t0

“four new cultivars of Nigerian cowpea”

✓ located verbatim in the source · title, characters 50–87 · show in text ↑
e6

“No significant difference in hardness was found between unsoaked beans cooked for 30 min and soaked beans cooked for 10 min, suggesting that cookability for all cultivars was improved through soaking”

✓ located verbatim in the source · abstract, characters 1096–1295 · show in text ↑

processing · quality: postharvest · Vigna unguiculata (cowpea)Positive and negative results

5 papers: 2 positive, 3 negative or no effect

2 papers in the same direction as this paper · 2 in the opposite direction

  1. positive
  2. positive
  3. no effect

1 paper more in this group

See all 5 papers →

application · quality: postharvest · Vigna unguiculata (cowpea)Positive and negative results

5 papers: 3 positive, 2 negative or no effect

1 paper in the same direction as this paper · 3 in the opposite direction

  1. positive
  2. positive
  3. positive

1 paper more in this group

See all 5 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.