Quality attributes of sweet potato flour as influenced by variety, pretreatment and drying method

The effect of pretreatment methods (soaking in water, potassium metabisulphite solution, and blanching) and drying methods (sun and oven) on some quality attributes of flour from ten varieties of sweet potato roots were investigated. The quality attributes determined were chemical composition and fu...

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Veröffentlicht in:Food Science & Nutrition 2016-07, Vol.4 (4), p.623-635
Hauptverfasser: Olatunde, Ganiyat O., Henshaw, Folake O., Idowu, Michael A., Tomlins, Keith
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Henshaw, Folake O.
Idowu, Michael A.
Tomlins, Keith
description The effect of pretreatment methods (soaking in water, potassium metabisulphite solution, and blanching) and drying methods (sun and oven) on some quality attributes of flour from ten varieties of sweet potato roots were investigated. The quality attributes determined were chemical composition and functional properties. Data obtained were subjected to descriptive statistics, multivariate analysis of variance, and Pearson's correlation. The range of values for properties of sweet potato flour were: moisture (8.06–12.86 ± 1.13%), starch (55.76–83.65 ± 6.82%), amylose (10.06–21.26 ± 3.92%), total sugar (22.39–125.46 ± 24.68 μg/mg), water absorption capacity (140–280 ± 26), water solubility (6.89–26.18 ± 3.80), swelling power (1.66–5.00 ± 0.50), peak viscosity (24.50–260.92 ± 52.61 RVU), trough (7.08–145.83 ± 34.48 RVU), breakdown viscosity (11.00–125.33 RVU), final viscosity (10.21–225.50 ± 60.55 RVU), setback viscosity (3.04–92.21 RVU), peak time (6.07–9.06 min) and pasting temperature (69.8–81.3°C). Variety had a significant (P  0.05) affect moisture, fat and lightness (L*). Drying method did not significantly (P > 0.05) affect fiber and L*. The interactive effect of variety, pretreatment and drying method had a significant (P 
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The quality attributes determined were chemical composition and functional properties. Data obtained were subjected to descriptive statistics, multivariate analysis of variance, and Pearson's correlation. The range of values for properties of sweet potato flour were: moisture (8.06–12.86 ± 1.13%), starch (55.76–83.65 ± 6.82%), amylose (10.06–21.26 ± 3.92%), total sugar (22.39–125.46 ± 24.68 μg/mg), water absorption capacity (140–280 ± 26), water solubility (6.89–26.18 ± 3.80), swelling power (1.66–5.00 ± 0.50), peak viscosity (24.50–260.92 ± 52.61 RVU), trough (7.08–145.83 ± 34.48 RVU), breakdown viscosity (11.00–125.33 RVU), final viscosity (10.21–225.50 ± 60.55 RVU), setback viscosity (3.04–92.21 RVU), peak time (6.07–9.06 min) and pasting temperature (69.8–81.3°C). Variety had a significant (P &lt; 0.001) effect on all the attributes of sweet potato flour. Pretreatment did not significantly (P &gt; 0.05) affect moisture, fat and lightness (L*). Drying method did not significantly (P &gt; 0.05) affect fiber and L*. The interactive effect of variety, pretreatment and drying method had a significant (P &lt; 0.001) effect on all the attributes except fat and fiber. Total sugar correlated significantly (P &lt; 0.01) with water solubility (r = 0.88) of the flour samples. Variety was a dominant factor influencing attributes of sweet potato flour and so should be targeted at specific end uses. The effect of pretreatment and drying methods on some quality attributes of flour from ten varieties of sweet potato (SP) roots were investigated. The interactive effect of variety, pretreatment and drying method had a significant (P &lt; 0.001) effect on all the attributes except fat and fiber. 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Drying method did not significantly (P &gt; 0.05) affect fiber and L*. The interactive effect of variety, pretreatment and drying method had a significant (P &lt; 0.001) effect on all the attributes except fat and fiber. Total sugar correlated significantly (P &lt; 0.01) with water solubility (r = 0.88) of the flour samples. Variety was a dominant factor influencing attributes of sweet potato flour and so should be targeted at specific end uses. The effect of pretreatment and drying methods on some quality attributes of flour from ten varieties of sweet potato (SP) roots were investigated. The interactive effect of variety, pretreatment and drying method had a significant (P &lt; 0.001) effect on all the attributes except fat and fiber. 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Nutrition</jtitle><addtitle>Food Sci Nutr</addtitle><date>2016-07</date><risdate>2016</risdate><volume>4</volume><issue>4</issue><spage>623</spage><epage>635</epage><pages>623-635</pages><issn>2048-7177</issn><eissn>2048-7177</eissn><abstract>The effect of pretreatment methods (soaking in water, potassium metabisulphite solution, and blanching) and drying methods (sun and oven) on some quality attributes of flour from ten varieties of sweet potato roots were investigated. The quality attributes determined were chemical composition and functional properties. Data obtained were subjected to descriptive statistics, multivariate analysis of variance, and Pearson's correlation. The range of values for properties of sweet potato flour were: moisture (8.06–12.86 ± 1.13%), starch (55.76–83.65 ± 6.82%), amylose (10.06–21.26 ± 3.92%), total sugar (22.39–125.46 ± 24.68 μg/mg), water absorption capacity (140–280 ± 26), water solubility (6.89–26.18 ± 3.80), swelling power (1.66–5.00 ± 0.50), peak viscosity (24.50–260.92 ± 52.61 RVU), trough (7.08–145.83 ± 34.48 RVU), breakdown viscosity (11.00–125.33 RVU), final viscosity (10.21–225.50 ± 60.55 RVU), setback viscosity (3.04–92.21 RVU), peak time (6.07–9.06 min) and pasting temperature (69.8–81.3°C). Variety had a significant (P &lt; 0.001) effect on all the attributes of sweet potato flour. Pretreatment did not significantly (P &gt; 0.05) affect moisture, fat and lightness (L*). Drying method did not significantly (P &gt; 0.05) affect fiber and L*. The interactive effect of variety, pretreatment and drying method had a significant (P &lt; 0.001) effect on all the attributes except fat and fiber. Total sugar correlated significantly (P &lt; 0.01) with water solubility (r = 0.88) of the flour samples. Variety was a dominant factor influencing attributes of sweet potato flour and so should be targeted at specific end uses. The effect of pretreatment and drying methods on some quality attributes of flour from ten varieties of sweet potato (SP) roots were investigated. The interactive effect of variety, pretreatment and drying method had a significant (P &lt; 0.001) effect on all the attributes except fat and fiber. Variety was a dominant factor influencing attributes of sweet potato flour and so should be targeted at specific end uses.</abstract><cop>United States</cop><pub>John Wiley &amp; Sons, Inc</pub><pmid>27386111</pmid><doi>10.1002/fsn3.325</doi><tpages>13</tpages><orcidid>https://orcid.org/0000-0001-7748-8321</orcidid><oa>free_for_read</oa></addata></record>
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source Wiley Online Library Journals Frontfile Complete; Wiley Online Library Open Access; EZB-FREE-00999 freely available EZB journals; PubMed Central
subjects Amylose
Blanching
Carbohydrates
Chemical composition
Correlation analysis
Drying
Drying ovens
Flour
Food products
food quality
Laboratories
Methods
Moisture
Multivariate analysis
Organic chemistry
Original Research
Polyethylene
Potatoes
Pretreatment
Quality
Quality management
Solubility
Starch
Statistical analysis
Statistical methods
Sugar
sweet potato flour
Sweet potatoes
Variance analysis
variety
Vegetables
Viscosity
Water absorption
Weaning
title Quality attributes of sweet potato flour as influenced by variety, pretreatment and drying method
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