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| サビニアーノ, ナオミ S.; 石橋, 憲一; 弘中, 和憲; 山本, 和夫; SABINIANO, Naomy S.; Ishibashi, Ken-ichi; Hironaka, Kazunori; Yamamoto, Kazuo. |
| The effect of temperature on the properties of potato starch during storage at 1, 5 and 10 centigrade for 6 months were determined. The Brabender peak viscosity, final viscosity at 92.5 centigrade breakdown, swelling power, solubility and phosphorus content decreased while initial pasting temperature, temperature at peak viscosity and blue value of the starches increased during storage. Phosphorus content was highly correlated with Brabender peak viscosity and breakdown(r =0.92 and 0.82, respectively, p<0.01). Higher rates of decrease in viscosity and phosphorus content occurred at 1 and 10 centigrade during storage.... |
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Palavras-chave: Potato storage; Potato starch; Brabender viscosity; Swelling power; Solubility; Phosphorus; Blue value; 馬鈴薯貯蔵; 馬鈴薯デンプン; ブラベンダー粘度; 膨潤度; 溶解度; リン含量; 青価. |
| Ano: 1994 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/1862 |
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| Pavezzi,Fabiana Carina; Gomes,Eleni; Silva,Roberto da. |
| Glucoamylase is widely used in the food industry to produce high glucose syrup, and also in fermentation processes for production beer and ethanol. In this work the productivity of the glucoamylase of Aspergillus awamori expressed by the yeast Saccharomyces cerevisiae, produced in submerged fermentation using different starches, was evaluated and characterized physico-chemically. The enzyme presented high specific activity, 13.8 U/mgprotein or 2.9 U/mgbiomass, after 48 h of fermentation using soluble starch as substrate. Glucoamylase presented optimum activity at temperature of 55ºC, and, in the substratum absence, the thermostability was for 1h at 50ºC. The optimum pH of activity was pH 3.5 - 4.0 and the pH stability between 5.0 and 7.0. The half life at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Glucoamylase; Aspergillus awamori; Saccharomyces cerevisiae; Corn starch; Potato starch; Cassava starch. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000100024 |
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| WON,Chuin; JIN,Yong Ik; CHANG,Dong-Chil; KIM,Misook; LEE,Youngseung; GANESAN,Palanivel; LEE,Yun-Kyung; CHANG,Yoon Hyuk. |
| Abstract The objective of the present study was to investigate the rheological, pasting, and thermal properties of octenyl succinic anhydrate (OSA)-modified potato starch. Potato starch was modified using different concentrations of OSA (0, 1, 3, and 5%, v/v). The degree of substitution (DS) for the OSA-modified starch ranged from 0.0012 to 0.0055. The amylose leaching values of native and OSA-modified potato starch with different DS levels were in the range of 47.09-87.32%. The gel strength values of the OSA-modified starch were lower than those of native potato starch. Rapid Visco Analyzer data showed that peak, hot pasting, final and setback viscosities of the native starch decreased after OSA modification. Dynamic shear rheological tests, conducted at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Potato starch; Octenyl succinic anhydride; Rheological property; Pasting property; Retrogradation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000200321 |
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| 池田, 大輔; 石橋, 憲一; 野田, 高弘; 弘中, 和憲; 小疇, 浩; 山本, 和夫; Ikeda, Daisuke; Ishibashi, Ken-ichi; Noda, Takahiro; Hironaka, Kazunori; Koaze, Hiroshi; Yamamoto, Kazuo. |
| Potato tubers(cv.，Inka-no-mezame，Inka Red，Kitamurasaki，Danshaku and Kitahime)were stored at 4℃ for about 8 months and changes in physicochemical properties of starches isolated from potatoes were examined periodically during storage. Both average granule size and phosphorus content of starches were decreased during low temperature storage. However， the blue values of starches from five cultivars were increased with the increasing duration of storage period. These changes may suggest that amylopectin of the outer surface of starch granules is gradually converted to sugars during cold storage. There was no clear tendency regarding swelling power and solubility of starches during storage. From RVA analysis，the pasting temperature of Inka Red and... |
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Palavras-chave: Potato starch; Low temperature storage; Physicochemical properties. |
| Ano: 2005 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2965 |
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