Paper · 2011 · African Journal of Food Agriculture Nutrition and Development

Effect of germination on mineral bioavailability of sorghum-based complementary foods

S Tizazu; K Urga; A Belay; et al.

9
claims
26
verbatim quotes
32
citations
1
research areas
✓
Open access · cc-by-nc-nd

Abstract

Many people living in developing countries depend on diets based on cereal staples. Such diets lack diversity, which may result in micronutrient deficiencies. A complementary food made from cereals is often low in mineral content and contains ignificant quantities of mineral absorption inhibitors like phytic acid and condensed tannins. Anti-nutritional factors are plant constituents, which play an important role in humans, reducing the digestibility of nutrients and the absorption of minerals.Infant malnutrition due to nutritionally inadequate diets is one of the major concerns in Ethiopia. Children in rural Ethiopia are especially prone to micronutrient deficiencies as they eat from the family dish, which is predominantly plant-based. The main objective of this study is, therefore, to investigate the effect of germination on bioavailability of minerals of sorghum-based complementary foods. Two varieties of sorghum (Sorghum bicolor (L.) Moench) grains (varieties 76T1#23 and Meko) were collected, cleaned, soaked for 22 hours at room temperature (22±20C) and germinated for 36 and 48 hours at the soaking temperature. The germinated seeds were dried at 550C for 24 hours and the ungerminated sorghum seeds were also dried at 550C for 2 hours to facilitate milling. Both ungerminated and germinated sorghum grains weremilled into a homogeneous fine powder.Germination of sorghum grainsfor 36 and 48 hours decreased phytic acid levels (mg/100g) significantly (p<0.05) for variety 76T1#23 from 399.12 to 255.66 and 190.11, and from 464.94 to 293.18 and 203.76for variety Meko, respectively. During germination of sorghum grains for 36 and 48 hours, molar ratio of phytate: iron was decreased significantly (p<0.05) from 4.12 to 2.06 and 1.35 for variety 76T1#23, and from 5.49 to 2.35 and 1.58 for variety Meko, respectively. Similarly, germination of sorghum grains for 36 and 48 hours decreased significantly (p<0.05) phytate:zinc molar ratio of sorghum flour from 21.18 to 12.76 and 9.31 for variety 76T1#23; and from 25.72 to 15.54 and 10.64 for variety Meko, respectively. In contrast, germination of sorghum grains for 36 and 48 hours increased significantly (p<0.05) the contents of total phosphorus, non-phytate phosphorous, iron, zinc and calcium.Hence, germination appeared to be a promising food processing method to improve bioavailabilityof mineralsand to decrease phytate levels, and therefore to decrease deficiencies of minerals in infants.Key words: Germination, anti-nutritional factors, mineralbio-availability

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Claims 9

Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Germination for 36 and 48 hours decreased phytic acid in sorghum variety 76T1#23 from 399.12 to 255.66 and 190.11 mg/100g.

Taxon
Sorghum bicolorSorghum bicolore1
Material
variety 76T1#23e3
Treatment
Germination of sorghum grainse3
Outcome
phytic acid levelse3
Direction
decreasede3
Value
399.12 to 255.66 and 190.11e3
Qualifier
36 and 48 hourse3
Comparator
ungerminated sorghum seedse2

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Two varieties of sorghum (Sorghum bicolor (L.) Moench) grains (varieties 76T1#23 and Meko) were collected”

✓ located verbatim in the source · abstract, characters 904–1009 · show in text ↑
e2

“the ungerminated sorghum seeds were also dried at 550C for 2 hours”

✓ located verbatim in the source · abstract, characters 1189–1255 · show in text ↑
e3

“Germination of sorghum grainsfor 36 and 48 hours decreased phytic acid levels (mg/100g) significantly (p<0.05) for variety 76T1#23 from 399.12 to 255.66 and 190.11, and from 464.94 to 293.18 and 203.76for variety Meko, respectively”

✓ located verbatim in the source · abstract, characters 1369–1600 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Germination decreased the phytate:iron molar ratio in variety 76T1#23 from 4.12 to 2.06 and 1.35.

Taxon
Sorghum bicolorSorghum bicolore1
Material
variety 76T1#23e4
Treatment
germination of sorghum grainse4
Outcome
molar ratio of phytate: irone4
Direction
decreasede4
Value
4.12 to 2.06 and 1.35e4
Qualifier
36 and 48 hourse4
Comparator
ungerminated sorghum seedse2

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Two varieties of sorghum (Sorghum bicolor (L.) Moench) grains (varieties 76T1#23 and Meko) were collected”

✓ located verbatim in the source · abstract, characters 904–1009 · show in text ↑
e2

“the ungerminated sorghum seeds were also dried at 550C for 2 hours”

✓ located verbatim in the source · abstract, characters 1189–1255 · show in text ↑
e4

“During germination of sorghum grains for 36 and 48 hours, molar ratio of phytate: iron was decreased significantly (p<0.05) from 4.12 to 2.06 and 1.35 for variety 76T1#23, and from 5.49 to 2.35 and 1.58 for variety Meko, respectively”

✓ located verbatim in the source · abstract, characters 1602–1835 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Germination decreased phytic acid in variety Meko from 464.94 to 293.18 and 203.76 mg/100g.

Taxon
Sorghum bicolorSorghum bicolore1
Material
variety Mekoe3
Treatment
Germination of sorghum grainse3
Outcome
phytic acid levelse3
Direction
decreasede3
Value
464.94 to 293.18 and 203.76e3
Qualifier
36 and 48 hourse3
Comparator
ungerminated sorghum seedse2

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Two varieties of sorghum (Sorghum bicolor (L.) Moench) grains (varieties 76T1#23 and Meko) were collected”

✓ located verbatim in the source · abstract, characters 904–1009 · show in text ↑
e2

“the ungerminated sorghum seeds were also dried at 550C for 2 hours”

✓ located verbatim in the source · abstract, characters 1189–1255 · show in text ↑
e3

“Germination of sorghum grainsfor 36 and 48 hours decreased phytic acid levels (mg/100g) significantly (p<0.05) for variety 76T1#23 from 399.12 to 255.66 and 190.11, and from 464.94 to 293.18 and 203.76for variety Meko, respectively”

✓ located verbatim in the source · abstract, characters 1369–1600 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Germination decreased the phytate:iron molar ratio in variety Meko from 5.49 to 2.35 and 1.58.

Taxon
Sorghum bicolorSorghum bicolore1
Material
variety Mekoe4
Treatment
germination of sorghum grainse4
Outcome
molar ratio of phytate: irone4
Direction
decreasede4
Value
5.49 to 2.35 and 1.58e4
Qualifier
36 and 48 hourse4
Comparator
ungerminated sorghum seedse2

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Two varieties of sorghum (Sorghum bicolor (L.) Moench) grains (varieties 76T1#23 and Meko) were collected”

✓ located verbatim in the source · abstract, characters 904–1009 · show in text ↑
e2

“the ungerminated sorghum seeds were also dried at 550C for 2 hours”

✓ located verbatim in the source · abstract, characters 1189–1255 · show in text ↑
e4

“During germination of sorghum grains for 36 and 48 hours, molar ratio of phytate: iron was decreased significantly (p<0.05) from 4.12 to 2.06 and 1.35 for variety 76T1#23, and from 5.49 to 2.35 and 1.58 for variety Meko, respectively”

✓ located verbatim in the source · abstract, characters 1602–1835 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Germination decreased the phytate:zinc molar ratio of sorghum flour in variety 76T1#23 from 21.18 to 12.76 and 9.31.

Taxon
Sorghum bicolorSorghum bicolore1
Material
variety 76T1#23e5
Treatment
germination of sorghum grainse5
Outcome
phytate:zinc molar ratio of sorghum floure5
Direction
decreasede5
Value
21.18 to 12.76 and 9.31e5
Comparator
ungerminated sorghum seedse2

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Two varieties of sorghum (Sorghum bicolor (L.) Moench) grains (varieties 76T1#23 and Meko) were collected”

✓ located verbatim in the source · abstract, characters 904–1009 · show in text ↑
e2

“the ungerminated sorghum seeds were also dried at 550C for 2 hours”

✓ located verbatim in the source · abstract, characters 1189–1255 · show in text ↑
e5

“Similarly, germination of sorghum grains for 36 and 48 hours decreased significantly (p<0.05) phytate:zinc molar ratio of sorghum flour from 21.18 to 12.76 and 9.31 for variety 76T1#23; and from 25.72 to 15.54 and 10.64 for variety Meko, respectively”

✓ located verbatim in the source · abstract, characters 1837–2087 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Germination decreased the phytate:zinc molar ratio of sorghum flour in variety Meko from 25.72 to 15.54 and 10.64.

Taxon
Sorghum bicolorSorghum bicolore1
Material
variety Mekoe5
Treatment
germination of sorghum grainse5
Outcome
phytate:zinc molar ratio of sorghum floure5
Direction
decreasede5
Value
25.72 to 15.54 and 10.64e5
Comparator
ungerminated sorghum seedse2

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Two varieties of sorghum (Sorghum bicolor (L.) Moench) grains (varieties 76T1#23 and Meko) were collected”

✓ located verbatim in the source · abstract, characters 904–1009 · show in text ↑
e2

“the ungerminated sorghum seeds were also dried at 550C for 2 hours”

✓ located verbatim in the source · abstract, characters 1189–1255 · show in text ↑
e5

“Similarly, germination of sorghum grains for 36 and 48 hours decreased significantly (p<0.05) phytate:zinc molar ratio of sorghum flour from 21.18 to 12.76 and 9.31 for variety 76T1#23; and from 25.72 to 15.54 and 10.64 for variety Meko, respectively”

✓ located verbatim in the source · abstract, characters 1837–2087 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Germination increased the contents of total phosphorus, non-phytate phosphorus and iron in sorghum grain.

Taxon
Sorghum bicolorSorghum bicolore1
Treatment
germination of sorghum grainse6
Outcome
contents of total phosphorus, non-phytate phosphorous, irone6
Direction
increasede6
Comparator
ungerminated sorghum seedse2

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Two varieties of sorghum (Sorghum bicolor (L.) Moench) grains (varieties 76T1#23 and Meko) were collected”

✓ located verbatim in the source · abstract, characters 904–1009 · show in text ↑
e2

“the ungerminated sorghum seeds were also dried at 550C for 2 hours”

✓ located verbatim in the source · abstract, characters 1189–1255 · show in text ↑
e6

“In contrast, germination of sorghum grains for 36 and 48 hours increased significantly (p<0.05) the contents of total phosphorus, non-phytate phosphorous, iron, zinc and calcium”

✓ located verbatim in the source · abstract, characters 2089–2266 · show in text ↑
Intervention effectobservedoriginal resultpositivesignificant (as stated)measured

Claim · model-written summary

Germination increased the contents of zinc and calcium in sorghum grain.

Taxon
Sorghum bicolorSorghum bicolore1
Treatment
germination of sorghum grainse6
Outcome
zinc and calciume6
Direction
increasede6
Comparator
ungerminated sorghum seedse2

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Two varieties of sorghum (Sorghum bicolor (L.) Moench) grains (varieties 76T1#23 and Meko) were collected”

✓ located verbatim in the source · abstract, characters 904–1009 · show in text ↑
e2

“the ungerminated sorghum seeds were also dried at 550C for 2 hours”

✓ located verbatim in the source · abstract, characters 1189–1255 · show in text ↑
e6

“In contrast, germination of sorghum grains for 36 and 48 hours increased significantly (p<0.05) the contents of total phosphorus, non-phytate phosphorous, iron, zinc and calcium”

✓ located verbatim in the source · abstract, characters 2089–2266 · show in text ↑
Recommendationauthor interpretationoriginal resultpositivebasis n/a

Claim · model-written summary

Germination is a promising food processing method to improve mineral bioavailability and decrease phytate in sorghum.

Taxon
Sorghum bicolorSorghum bicolore1
Outcome
promising food processing methode7

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

Sorghum bicolor
Sorghum bicolor · TaxonNo machine-readable author provided. Pethan assumed (based on copyright claims). · CC BY-SA 3.0 · Wikimedia Commons ↗

Verbatim

e1

“Two varieties of sorghum (Sorghum bicolor (L.) Moench) grains (varieties 76T1#23 and Meko) were collected”

✓ located verbatim in the source · abstract, characters 904–1009 · show in text ↑
e7

“Hence, germination appeared to be a promising food processing method to improve bioavailabilityof mineralsand to decrease phytate levels, and therefore to decrease deficiencies of minerals in infants”

✓ located verbatim in the source · abstract, characters 2267–2466 · show in text ↑

Sorghum · molecular: metabolites · Sorghum bicolor (sorghum)Results agree

2 papers: 2 positive, 0 negative or no effect

1 paper in the same direction as this paper

  1. positive
See all 2 papers →

Sorghum · nutrient: content · Sorghum bicolor (sorghum)Results agree

3 papers: 3 positive, 0 negative or no effect

2 papers in the same direction as this paper

  1. positive
  2. positive
See all 3 papers →

processing · molecular: metabolites · Sorghum bicolor (sorghum)Positive and negative results

3 papers: 2 positive, 1 negative or no effect

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

  1. no effect
  2. positive
See all 3 papers →

processing · nutrient: content · Sorghum bicolor (sorghum)Positive and negative results

4 papers: 3 positive, 1 negative or no effect

2 papers in the same direction as this paper · 1 in the opposite direction

  1. no effect
  2. positive
  3. positive
See all 4 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.