• 제목/요약/키워드: acetylated tapioca starch

검색결과 3건 처리시간 0.018초

Rheological Properties of Hot Pepper-soybean Pastes Mixed with Acetylated Starches

  • Choi, Su-Jin;Chang, Hak-Gil;Yoo, Byoung-Seung
    • Food Science and Biotechnology
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    • 제17권4호
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    • pp.780-786
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    • 2008
  • Effect of acetylated starches (acetylated rice starch and acetylated tapioca starch) on rheological properties of hot pepper-soybean paste (HPSP) at different mixing ratios of rice flour (RF) and acetylated starch (AS) (10/0, 9/1, 8/2, and 7/3) was evaluated in steady and dynamic shear. All HPSP samples at $25^{\circ}C$ exhibited shear-thinning (n=0.31-0.36) and thixotropic behavior with high yield stresses and their steady flow curves were well described by power law and Casson models. The presence of AS resulted in the decrease in consistency index (K), apparent viscosity (${\eta}_{a,100}$), and yield stress (${\sigma}_{oc}$), and their predominant decreases were noticed at higher ratio of RF to AS (7/3 ratio). Arrhenius temperature relationship represents variation with temperature in the range of $5-35^{\circ}C$ with the high determination coefficients ($R^2=0.97-0.99$). Dynamic moduli (G', G", and ${\eta}^*$) values of HPSP samples mixed with AS were lower than those of HPSP with no added AS within the experimental range of frequency (0.63-62.8 rad/sec). Steady and dynamic shear rheological properties of HPSP samples seem to be greatly influenced by the presence of acetylated starch.

Dynamic Rheological Invest igation of Hot Pepper-soybean Paste Mixed with Acetylated Starch: Effect of Storage Time and Temperature

  • Yoo, Byoung-Seung
    • Food Science and Biotechnology
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    • 제17권5호
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    • pp.1119-1121
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    • 2008
  • The effects of storage time (0, 1, and 2 month) and temperature (5, 15, and $25^{\circ}C$) on the dynamic rheological properties of hot pepper-soybean paste (HPSP) mixed with acetylated starches (AS) were studied by small-deformation oscillatory measurements. Dynamic moduli (G', G", and $\eta^*$) values of HPSP-AS mixtures increased with an increase in storage time and also decreased with increasing storage temperature. However, dynamic moduli values of the control (no added AS) were independent on storage time and temperature. Tan $\delta$ values (ratio of G"/G') in all HPSP samples did not change much with an increase in storage time and temperature. After 2 months of storage, the dynamic moduli of the HPSP-AS mixture samples were much lower than those of the control, indicating that the addition of AS can inhibit the retrogradation that developed over a long period of storage. Structural and rheological properties of HPSP samples seem to be stabilized by the presence of AS.

변성 전분을 첨가한 식빵의 품질 특성 (Quality Characteristics of White Bread added Modified Starch)

  • 김효숙;이승주;이승주
    • 동아시아식생활학회지
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    • 제25권3호
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    • pp.474-483
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    • 2015
  • 밀가루에 3종의 변성 전분(초산 감자 전분, 알파화 찰옥수수 전분, 히드록시프로필화 타피오카 전분)의 첨가량(3, 6, 9, 12, 15%)을 달리하여 제조하고, 이의 텍스쳐 특성과 기호도를 분석하였다. 첨가한 변성 전분 종류별 기호도는 대조구에 비하여 알파화 찰옥수수 전분은 3% 이상 6% 이하 사용 시, 초산 감자 전분의 경우 사용량 6%까지, 히드록시프로필화 타피오카 전분은 9%까지 높은 결과를 보였다. 이와 같은 결과로 볼 때 밀가루에 변성 전분을 첨가할 때 사용량의 증가에 따라 식빵의 firmness가 낮아지며, 변성 전분 종류 별로 일정 사용량의 범위에서 기호도가 상승되었다. 최근 식빵 텍스쳐에 대한 기호도가 기존의 일반 식빵보다 찰지고 보습성이 있는 제품을 선호하는 경향으로 변하고 있어 밀가루에 변성 전분을 첨가하여 소비자들이 요구하는 텍스쳐의 제품을 제조할 수 있으며, 변성 전분 첨가 식빵이 대조군에 비해 firmness가 낮아짐으로서 변성 전분의 첨가가 식빵의 노화 지연에도 도움을 주는 것으로 알 수 있었다. 또한 변성 전분 첨가 시에 식빵의 텍스쳐는 향상될 수 있으며, 부피가 작아지는 특성이 수반됨을 알 수 있었으나, 이들 전분류의 특성을 파악하여 제빵에 적정량을 첨가할 경우 다양한 텍스쳐의 빵 제품들을 만들 수 있을 것으로 기대된다.