Effect of chemical pretreatments and lactic acid on the rate of water absorption and starch yield in corn wet-milling
The relative effectiveness of dehulling, potassium hydroxide dipping (alkali concentrations 0.2, 0.5, and 1.0 %), and ethyl oleate spraying (aqueous emulsion 1%, v/v) to increase the rate of water absorption by dent and flint corn during steeping was compared with untreated corn samples. These pretr...
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1999
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00090352_v76_n5_p783_Haros http://hdl.handle.net/20.500.12110/paper_00090352_v76_n5_p783_Haros |
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paper:paper_00090352_v76_n5_p783_Haros2023-06-08T14:33:25Z Effect of chemical pretreatments and lactic acid on the rate of water absorption and starch yield in corn wet-milling lactic acid oleic acid potassium hydroxide starch sulfite water aqueous solution article controlled study corn diffusion coefficient protein analysis water absorption water transport Zea mays The relative effectiveness of dehulling, potassium hydroxide dipping (alkali concentrations 0.2, 0.5, and 1.0 %), and ethyl oleate spraying (aqueous emulsion 1%, v/v) to increase the rate of water absorption by dent and flint corn during steeping was compared with untreated corn samples. These pretreatments increased the water absorption rate of both hybrids when compared with the untreated control samples. To evaluate the observed increase, the diffusion coefficients of pretreated and untreated corn samples were estimated. Corn grains steeped in SO2 aqueous solution and variable lactic acid concentrations (0.2, 0.5, and 1.0%, v/v) were performed. Absorption rates for lactic acid concentrations were ≃0.5% higher than those steeped only in SO2 solution. This effect was more marked for dent than for flint corn. Corn samples pretreated with potassium hydroxide had lower starch yields than the control. However, the presence of lactic acid in steepwater increased the starch yield of dent and flint corn, particularly for the samples treated with alkaline solution. This procedure was particularly beneficial for flint corn. An effective release of the starch granules was achieved within 24 hr of steeping. 1999 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00090352_v76_n5_p783_Haros http://hdl.handle.net/20.500.12110/paper_00090352_v76_n5_p783_Haros |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
lactic acid oleic acid potassium hydroxide starch sulfite water aqueous solution article controlled study corn diffusion coefficient protein analysis water absorption water transport Zea mays |
| spellingShingle |
lactic acid oleic acid potassium hydroxide starch sulfite water aqueous solution article controlled study corn diffusion coefficient protein analysis water absorption water transport Zea mays Effect of chemical pretreatments and lactic acid on the rate of water absorption and starch yield in corn wet-milling |
| topic_facet |
lactic acid oleic acid potassium hydroxide starch sulfite water aqueous solution article controlled study corn diffusion coefficient protein analysis water absorption water transport Zea mays |
| description |
The relative effectiveness of dehulling, potassium hydroxide dipping (alkali concentrations 0.2, 0.5, and 1.0 %), and ethyl oleate spraying (aqueous emulsion 1%, v/v) to increase the rate of water absorption by dent and flint corn during steeping was compared with untreated corn samples. These pretreatments increased the water absorption rate of both hybrids when compared with the untreated control samples. To evaluate the observed increase, the diffusion coefficients of pretreated and untreated corn samples were estimated. Corn grains steeped in SO2 aqueous solution and variable lactic acid concentrations (0.2, 0.5, and 1.0%, v/v) were performed. Absorption rates for lactic acid concentrations were ≃0.5% higher than those steeped only in SO2 solution. This effect was more marked for dent than for flint corn. Corn samples pretreated with potassium hydroxide had lower starch yields than the control. However, the presence of lactic acid in steepwater increased the starch yield of dent and flint corn, particularly for the samples treated with alkaline solution. This procedure was particularly beneficial for flint corn. An effective release of the starch granules was achieved within 24 hr of steeping. |
| title |
Effect of chemical pretreatments and lactic acid on the rate of water absorption and starch yield in corn wet-milling |
| title_short |
Effect of chemical pretreatments and lactic acid on the rate of water absorption and starch yield in corn wet-milling |
| title_full |
Effect of chemical pretreatments and lactic acid on the rate of water absorption and starch yield in corn wet-milling |
| title_fullStr |
Effect of chemical pretreatments and lactic acid on the rate of water absorption and starch yield in corn wet-milling |
| title_full_unstemmed |
Effect of chemical pretreatments and lactic acid on the rate of water absorption and starch yield in corn wet-milling |
| title_sort |
effect of chemical pretreatments and lactic acid on the rate of water absorption and starch yield in corn wet-milling |
| publishDate |
1999 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00090352_v76_n5_p783_Haros http://hdl.handle.net/20.500.12110/paper_00090352_v76_n5_p783_Haros |
| _version_ |
1768543210302341120 |