Abstract
Waxy maize and waxy rice starches were subjected to dry heating in the presence of phytic acid at 120 °C for 6 or 24 h under alkaline conditions to induce phosphorylation. Dry heating at 120 °C for 24 h with phytic acid increased the residual phosphorus content of waxy maize and waxy rice starches from 11.5 to 92.9 ppm and from 27.5 to 79.3 ppm, respectively. 31P Nuclear magnetic resonance (NMR) analysis revealed the presence of monostarch monophosphate in the treated starches. The pasting viscosity of the starches was substantially changed by the phosphorylation, showing increases in peak viscosity, breakdown, and setback viscosity, but decrease in pasting temperature. Paste clarity and swelling power also increased after phosphorylation. Reduced melting temperature and enthalpy were observed for the phosphorylated starches. Thus, phytic acid is an effective reagent for phosphorylating starch to improve its pasting properties.
| Original language | English |
|---|---|
| Article number | 115225 |
| Journal | Carbohydrate Polymers |
| Volume | 225 |
| DOIs | |
| Publication status | Published - 2019 Dec 1 |
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Keywords
- Dry heating
- Phosphorylation
- Phytic acid
- Starch
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry
Cite this
Characterization of waxy starches phosphorylated using phytic acid. / Park, Eun Young; Lim, Seung Taik.
In: Carbohydrate Polymers, Vol. 225, 115225, 01.12.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Characterization of waxy starches phosphorylated using phytic acid
AU - Park, Eun Young
AU - Lim, Seung Taik
PY - 2019/12/1
Y1 - 2019/12/1
N2 - Waxy maize and waxy rice starches were subjected to dry heating in the presence of phytic acid at 120 °C for 6 or 24 h under alkaline conditions to induce phosphorylation. Dry heating at 120 °C for 24 h with phytic acid increased the residual phosphorus content of waxy maize and waxy rice starches from 11.5 to 92.9 ppm and from 27.5 to 79.3 ppm, respectively. 31P Nuclear magnetic resonance (NMR) analysis revealed the presence of monostarch monophosphate in the treated starches. The pasting viscosity of the starches was substantially changed by the phosphorylation, showing increases in peak viscosity, breakdown, and setback viscosity, but decrease in pasting temperature. Paste clarity and swelling power also increased after phosphorylation. Reduced melting temperature and enthalpy were observed for the phosphorylated starches. Thus, phytic acid is an effective reagent for phosphorylating starch to improve its pasting properties.
AB - Waxy maize and waxy rice starches were subjected to dry heating in the presence of phytic acid at 120 °C for 6 or 24 h under alkaline conditions to induce phosphorylation. Dry heating at 120 °C for 24 h with phytic acid increased the residual phosphorus content of waxy maize and waxy rice starches from 11.5 to 92.9 ppm and from 27.5 to 79.3 ppm, respectively. 31P Nuclear magnetic resonance (NMR) analysis revealed the presence of monostarch monophosphate in the treated starches. The pasting viscosity of the starches was substantially changed by the phosphorylation, showing increases in peak viscosity, breakdown, and setback viscosity, but decrease in pasting temperature. Paste clarity and swelling power also increased after phosphorylation. Reduced melting temperature and enthalpy were observed for the phosphorylated starches. Thus, phytic acid is an effective reagent for phosphorylating starch to improve its pasting properties.
KW - Dry heating
KW - Phosphorylation
KW - Phytic acid
KW - Starch
UR - http://www.scopus.com/inward/record.url?scp=85071487355&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85071487355&partnerID=8YFLogxK
U2 - 10.1016/j.carbpol.2019.115225
DO - 10.1016/j.carbpol.2019.115225
M3 - Article
C2 - 31521292
AN - SCOPUS:85071487355
VL - 225
JO - Carbohydrate Polymers
JF - Carbohydrate Polymers
SN - 0144-8617
M1 - 115225
ER -