• 제목/요약/키워드: gelatinization

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노티의 재료에 따른 이화학적, 관능적 및 기계적 특성 연구 -제 2보: 차조 노티의 이화학적, 관능적 및 기계적 특성 연구- (Effect of Cereals on the Physicochemical and Sensory Characteristics of Noti - ll. Study on the Physicochemical and Sensory Characteristics of Glutinous millet Noti -)

  • 임희정;염초애
    • 한국식품조리과학회지
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    • v.12 no.2
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    • pp.166-177
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    • 1996
  • This study was undertaken to investigate the effect of cereals on the physicochemical and sensory characteristics of Noti. Noti is one of Korean traditional pan-fried glutinous cereal cakes. In this case, Noti was made from the steamed glutinous millet flour Aspergillus and Penicillium developed in glutinous millet Noti dough from 40th day. The reducing sugar content of glutinous millet Noti was higher than that of the Noti dough during the same period and almost similar as the first day even 90 day storage. The moisture content of glutinous millet Noti was less than 20%. Moisture content of glutinous millet Noti to compare with the common rice cake was from 1/2 to 1/3. While gelatinization degree significantly decreased in the rice cake that did not add malt, glutinous millet Noti did not show decreasing gelatinization degree in comparison with the common rice cake. Overall acceptability was to add 15% malt and keep 6 hr saccharification time at 60$^{\circ}C$. The hard ness of glutinous millet Noti by Instron measurement was slowly increased after the l0th day. Cohesiveness and elasticity were increased during the period of storage.

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기능성 쌀가루 혼합분의 제빵 적성 (Studies on Bread-Making Quality of Bread Mixed with Wheat Flour and Several Functional Rice Flour)

  • 유경아;강미영
    • 한국식생활문화학회지
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    • v.20 no.3
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    • pp.299-304
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    • 2005
  • This study investigated the feasibility of the bread making process with the mixture of the functional rice flour. The bread was manufactured with 20, 30 or 40% functional rice flour with increasing and wheat flour. Gelatinization characteristics of the rice starch was examined by differential scanning calorimetry(DSC). Coated with soluble dietary fiber rice showed the highest gelatinization enthalphy among functional rices and other functional rices were similar to normal rice. in the viscosity point of view. generally the viscosity related to the addition ratio. The most viscose case was 30% Sangwhang rice but in fermented with monascus ruber rice case, viscosity was low even with 40% case because of the transformation of the starch granules. In sensory evaluation, the highest sensory scores for the uniformity of pore size and flavor were obtained when sangwhang rice flour content was 20%. The textual study was mainly focused on the hardness, cohesiveness, adhesiveness, springiness, chewiness. Textural characteristics of functional rice bread crumb bakedwith 20% coated with soluble dietary fiber rice, 20% sangwhang was low in hardness, chewiness and gumminess. Therefore, Sangwhang rice flour 20%, Monascous ruber 20% and Coated soluble dietary fiber rice 20% were considered to be the most suitable addition ratio for the rice breads.

파보일미(Parboiled rice)의 이화학적 특성 -III. 파보일미(추청벼)의 취반 및 노화특성- (Cooking Characteristics and Firming Rate of Cooked Parboiled Rice)

  • 이명선;조은자
    • 한국식품조리과학회지
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    • v.12 no.1
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    • pp.46-53
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    • 1996
  • To investigate physicochemical and cooking properties of parboiled rice, choochung paddy processed to parboiled rice by three methods (PL, PT, PA) milled and examined hydration, cooking qualities and firming rate of cooked parboiled rice. The results were obtained as follows. The longer the steaming time during parboiling the larger EMC of soaked parboiled rice. Water uptake rate constants (k) of all the parboiled rice during soaking except for PT rice were generally increased than those of raw rice. The longer the steaming time during parboiling the greater volume increase rate constants ( $k_{v}$) of parboiled rice samples. The glelatinization temperature of parboiled rice flour by DSC was more increased than that of raw rice flour. Gelatinized entalpy was decreased and gelatinization content (%SG: degree of starch gelatinization) was increased by parboiling process. In cooking tests, parboiled rices were harder than raw rice and softness (reciprocal of hardness) was greater PT30, PA, PL30 in turns the cooking time of the parboiled rice took longer 3-10 min than that of raw rice, PL30 took longer time than anyother rices. Cooking water of parboiled rices could be observed lighter turbidities than that of raw rice. Firming rate constants of cooked rice during storage 24 hours were generally decreased by parboiling-processing. The time constants, reciprocal of firming constants of cooked PL30 rice were 2 times slower than those of cooked raw rice.e.

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취반기의 가열 방식별 취반미의 특성 비교 분석 (Quality Comparison of Rice Cooked on Heat Plate, Induction Heat, and Heat Plate with Pressure)

  • 김상숙;정혜영
    • 한국식품영양학회지
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    • v.30 no.3
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    • pp.464-472
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    • 2017
  • The qualities of rice cooked on heat plate, induction heat and heat plate with pressure, were investigated. The weight, volume, water soluble index (WSI), hydration by SEM (Scanning Electron Microscope), and gelatinization by DSC (Differential Scanning Calorimetry), as well as the consumer acceptability of cooked rice were analyzed. The weight, volume and WSI of rice cooked on heat plate with pressure were higher than those of rice cooked on heat plate and induction heat. The rice cooked on heat plate with pressure also showed higher degree of hydration and gelatinization, and lower degree of enthalpy of gelatinization than the rice cooked on heat plate and induction heat for 5~15 min. The consumer acceptability revealed that the odor, appearance, taste, texture and overall acceptance of rice cooked on induction heat were better than those of rice cooked on heat plate and heat plate with pressure. During storage in a cooker for 0~12 h, there was a decrease in the consumer acceptability of cooked rice. Overall results indicate that the qualities of rice cooked on induction heat and heat plate with pressure were higher than those of rice cooked on heat plate.

메밀가루의 첨가량을 달리하여 제조한 냉동 현미증편반죽의 품질특성 (Quality Characteristics of Frozen Brown-rice Jeung-pyun Dough Containing Different Amounts of Buckwheat Flour)

  • 정상열;박미정;이숙영
    • 한국식품조리과학회지
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    • v.27 no.1
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    • pp.11-19
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    • 2011
  • In this study, the physicochemical properties of buckwheat flour and quality characteristics of brown-rice doughs containing various concentrations of buckwheat flour stored at $-18^{\circ}C$ for 4 weeks and fermented were studied. The total polyphenolic contents, electron donating ability (EDA) of 0.5%, gelatinization onset temperature (To), gelatinization peak temperature (Tp), and gelatinization conclusion temperature (Tc) of buckwheat flour were 1,920.10mg%, 6.95%, $70.11^{\circ}C$, $78.21^{\circ}C$, and $84.05^{\circ}C$, respectively. There were no significant differences in the amount of yeast between brown-rice Jeung-pyun dough samples containing different levels of buckwheat flour and stored for different time periods. The amounts of carbon dioxide gas evolved from the brown-rice doughs were increased by increasing the concentration of buckwheat flour. The pH of brown-rice dough samples decreased with increasing storage period. Therefore, frozen brown-rice dough containing 6-15% buckwheat flour and stored for 3 weeks were the most desirable.

쌀 배유 조성 탄수화물 특성과 식미와의 연관성 (Relationship between Palatability and Physicochemical Properties of Carbohydrate Components in Rice Endosperm)

  • 김채은;손재근;강미영
    • 한국작물학회지
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    • v.52 no.4
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    • pp.421-428
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    • 2007
  • 8품종의 쌀을 시료로 하여 전분분자의 미세구조 및 전분입자 막 조성 탄수화물의 특성과 식미치와의 상관을 분석함으로써 밥맛에 영향을 미치는 탄수화물 성분 특성에 대해서 검토한 결과는 다음과 같다. 1. 본 연구에 사용한 8품종 가운데 식미치는 고품벼가 가장 높았다. 2. 아밀로그램상의 호화특성에도 유의미한 차이가 있었는데, 최고 점도(Peak viscosity)와 강하 점도(breakdown)는 히토메보레가 가장 높았고, 미향벼가 가장 낮았다. 그러나 이들 아밀로그램상의 호화특성과 식미치와는 아무런 상관이 없었다. 3. 전분분자 중의 아밀로오스 함량은 품종 간에 유의미한 차이가 있었고, 토요식미기에 의해서 분석된 아밀로오스 함량과도 차이가 있었다. 그러나 아밀로오스 분자의 구조적인 특성과 식미치 간에는 상관이 없었다. 4. 아밀로펙틴의 미세구조 중 B/A의 값이 가장 큰 품종은 새추청벼였고, 가장 작은 품종은 팔공벼였다. 그러나 이들 수치와 식미치와는 상관이 인정되지 않았다. 5. DSC에 의한 전분입자의 호화특성도 품종 간에 차이가 있었으며, 특히 호화엔탈피는 품종 간 차이가 크게 나타났다. 그러나 호화엔탈피 역시 식미치와는 상관이 없었다. 6. 쌀 배유전분분획의 헤미셀룰로오스성 다당을 구성하고 있는 단당류는 rhamnose, fucose, ribose, arabinose, xylose 등이었으며, 총 단당류 함량은 새추청벼가 가장 높았고, 팔공벼가 가장 낮았다. 그러나 팔공벼를 제외한 양질미에서는 식미치와 상관이 없는 것을 알 수 있었다.

가열에 따른 찹쌀전분 호화액의 특성 (Solublity Patterns and Gelatinization Properties of Waxy Rice Starches)

  • 송지영;신말식
    • Applied Biological Chemistry
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    • v.41 no.7
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    • pp.516-521
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    • 1998
  • 화선찰벼와 신선찰벼로부터 전분을 분리하여 이화학적 성질, 가열에 따른 용출양상과 호화 특성을 비교 하였다. 전분입자는 모두 둥글거나 다각형이었고, X-선 회절도 양상은 모두 A형을 보였다. 아밀로오스 함량은 신선찰벼와 화선찰벼 전분이 각각 1.48, 1.60%이었고, 물결합 능력은 138.3, 137.3%로 차이가 없었으며, $65{\sim}95^{\circ}C$범위에서 팽윤력과 용해도는 온도가 증가함에 따라 증가하였으나, 화선찰벼 전분이 더 높은 경향을 보였다. 가열온도에 따른 용출액의 요드 친화력은 온도증가에 따라 증가하였으며 신선찰벼전분이 더 높은 친화력을 보였고, 최대 흡수파장은 $75^{\circ}C$에서 가장 높았으며 신선찰벼전분이 584 nm, 화선찰벼전분이 556 nm로 신선찰벼전분이 더 높은 파장을 나타냈다. 전분 현탁액의 광투과도는 $60{\sim}65^{\circ}C$에서 급격한 증가를 보였고, 신속 점도 측정계에 의한 전분의 초기호화온도는 신선찰벼가 $67.2^{\circ}C$, 화선찰벼가 $68.2^{\circ}C$였으며, 시차주사열량기로 측정한 호화개시온도는 $61.3^{\circ}C,\;62.9^{\circ}C$로 신선찰벼전분이 더 낮은 온도에서 호화가 시작되었으나 엔탈피는 더 컸다.

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오미자 추출액을 첨가한 백설기의 관능적 품질 특성 (Quality Characteristics of Paeksolgi Added with Omija Water Extracts)

  • 정현숙
    • 동아시아식생활학회지
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    • v.8 no.2
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    • pp.173-180
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    • 1998
  • This study was conducted to examine the sensory quality, the degree of gelatization, pH, color, texture and moisture content of paeksolgi with omija water extracts added. The results of the analysis were as follows : The moisture contents of Paeksolgi were about 36~39%. The L value of the control group was 83.04 The degree of the colour was (L value: 71.82~86.56), (a value: -1.33~+0.78), (b value : 7.84~9.78). As the amount of omija water extracts was increased. the L and a values increased, but the b value showed a similar value, It was found that the yellowness decreases by increasing the soaking time of each type. The gelatinization of Paeksolgi with omija water extracts added was decreased as the amount of omija was increased. The sensory quality of paeksolgi with 5~7% omija water extracts added showed the most favorable sensory evaluation. In view of color, after taste and overall quality, the D$_2$group of Paeksolgi was preferable to the other paeksolgi groups with omija water extracts added.

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쌀 보리 전분의 성질비교 (Comparison of Some Properties of Naked Barley Starches)

  • 김오목;김관;김성곤
    • 한국식품과학회지
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    • v.17 no.1
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    • pp.33-36
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    • 1985
  • 쌀보리(송학, 영산 및 진안56호) 전분의 물 결합능력, 아밀로스 함량, 상대적 결정도, Swelling Power및 가열에 따른 호화도의 변화는 품종간에 뚜렷한 차이를 보이지 않았다. 그러나 아밀로그람 특성값 및 알카리에 의한 점도 증가 양상은 품종마다 독특한 경향을 보였다. 송학전분은 아밀로그람에 의한 호화온도가 가장 낮았으며, 알카리 호화에 대하여 저항성이 큰 경향을 보였다.

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탈지가 아끼바레(Japonica)와 밀양 30호(J/Indica) 쌀의 녹말호화 및 조리특성에 미치는 영향 (Effect of Defatting on Gelatinization of Starch and Cooking Properties of Akibare (Japonica) and Milyang 30 (J/Indica) Milled Rice)

  • 김순미;김광옥;김성곤
    • 한국식품과학회지
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    • v.18 no.5
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    • pp.393-397
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    • 1986
  • 본 실험에서는 탈지가 아끼바레 쌀과 밀양 30호 쌀에 있어서 녹말의 호화 및 밥의 텍스쳐 특성에 미치는 영향을 조사하였다. 탈지는 아끼바레보다 밀양 30호에 있어서 아밀로그람의 점도를 더 증가시켰다. 아끼바레와 밀양 30호로 만든 밥의 경도는 탈지에 의해 모두 감소 하였으나, 그 정도는 밀양 30호에 있어서 보다 현저하게 나타났다.

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