• Title/Summary/Keyword: gelatinization

Search Result 621, Processing Time 0.114 seconds

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

  • 임희정;염초애
    • Korean journal of food and cookery science
    • /
    • v.12 no.2
    • /
    • pp.166-177
    • /
    • 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.

  • PDF

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

  • Yoo, Kyung-A;Kang, Mi-Young
    • Journal of the Korean Society of Food Culture
    • /
    • v.20 no.3
    • /
    • pp.299-304
    • /
    • 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.

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

  • 이명선;조은자
    • Korean journal of food and cookery science
    • /
    • v.12 no.1
    • /
    • pp.46-53
    • /
    • 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.

  • PDF

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

  • Kim, Sang Sook;Chung, Hae Young
    • The Korean Journal of Food And Nutrition
    • /
    • v.30 no.3
    • /
    • pp.464-472
    • /
    • 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.

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

  • Jeong, Sang-Yeol;Park, Mi-Jung;Lee, Sook-Young
    • Korean journal of food and cookery science
    • /
    • v.27 no.1
    • /
    • pp.11-19
    • /
    • 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.

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

  • Kim, Chae-Eun;Sohn, Jae-Keun;Kang, Mi-Young
    • KOREAN JOURNAL OF CROP SCIENCE
    • /
    • v.52 no.4
    • /
    • pp.421-428
    • /
    • 2007
  • Eight varieties of milled rice showing different palatabilities were studied in order to identify the relationship between physicochemical properties of carbohydrate components and their fine structure. Gopumbyeo showed the highest palatability value among the eight varieties tested. Both peak viscosity and breakdown were hightest in Hitomebore, and lowest in Mihyangbyeo. No relationship was indicated between the palatability and gelatinization properties. The amylose content of starch showed a significant difference among the varieties tested. However, no relationship was found between the structure of amylose and the palatability of milled rice. The degree of branching(B/A value) was highest in Saechucheongbyeo, and lowest in Palgongbyeo in fine structure of amylopectin. But no relationship was indicated between the B/A values and the palatability of milled rice. Difference was indicated in properties of gelatinization of starch by differential scanning calorimetry. The enthalphy for gelatinization showed a significant difference among the varieties. However, no relationship was found between the enthalphy for gelatinization and the palatability of milled rice. Monosaccharide in endosperm was composed of rice were compound of rhamnose, fucose, ribose, arabinose, and xylose. The total content of monosaccharides was highest in Saechucheongbyeo, and lowest in Palgongbyeo. However, 7 varieties of milled rice, expect Palgongbyeo, showed no relationship between the palatability and monosaccharides contents.

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

  • Song, Ji-Young;Shin, Mal-Shick
    • Applied Biological Chemistry
    • /
    • v.41 no.7
    • /
    • pp.516-521
    • /
    • 1998
  • Solubility patterns and gelatinization properties of two waxy rice starches, Sinsunchalbyeo and Hwasunchalbyeo, were investigated. Shapes of all starch granules were round and polygonal, and their X-ray diffraction patterns were all A type. Amylose content and water binding capacity of Sinsunchalbyeo were similar to those of Hwasunchalbyeo. The swelling powers and solubilities of two starches were increased with increasing temperature in range of $65{\sim}95^{\circ}C$, and those of Hwasunchalbyeo was higher. Iodine affinities of soluble fractions in Sinsunchalbyeo starch were higher than those in Hwasunchalbyeo at the same temperature and both were increased with increasing temperature. λmax of soluble fraction of Sinsunchalbyeo starch was highest at $75^{\circ}C$ of heating temperature. The transmittance of starch suspensions were increased rapidly at $60{\sim}65^{\circ}C$. By Rapid Visco Analyzer, initial gelatinization temperature of Sinsunchalbyeo was $67.2^{\circ}C$, and that of Hwasunchalbyeo was $68.2^{\circ}C$. In DSC analysis, onset temperature for gelatinization of Sinsunchalbyeo and Hwasunchalbyeo were $61.3^{\circ}C\;and\;62.9^{\circ}C$, respectively.

  • PDF

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

  • 정현숙
    • Journal of the East Asian Society of Dietary Life
    • /
    • v.8 no.2
    • /
    • pp.173-180
    • /
    • 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.

  • PDF

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

  • Kim, Oh-Mok;Kim, Kwan;Kim, Sung-Kon
    • Korean Journal of Food Science and Technology
    • /
    • v.17 no.1
    • /
    • pp.33-36
    • /
    • 1985
  • Some properties of starches from three naked barley cultivars(Songhak, Youngsan and Jinan 56) were compared. No significant differences in water-binding capacity, amylose content, relative crystallinity, swelling power and gelatinization degree at various pasting temperatures among cultivars were observed. However, starches showed characteristic viscograph indices and viscosity development patterns in aqueous sodium hydroxide solution. Songhak starch exhibited the lowest pasting temperature and was the most resist to alkali gelatinization.

  • PDF

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

  • Kim, Soon-Mi;Kim, Kwang-Ok;Kim, Sung-Kon
    • Korean Journal of Food Science and Technology
    • /
    • v.18 no.5
    • /
    • pp.393-397
    • /
    • 1986
  • Effects of defatting on the starch gelatinization of Akibare (Japomica) and Milyang 30(J/Indica) rice and on textural properties of cooked rices were investigated. Defatting increased amylographic viscosity greater in Milyang 30 than in Akibare. Hardness of cooked rice was decreased by defatting both in Akibare and Milyang 30. The reduction of hardness, however, was more pronounced for Milyang 30 than for Akibare, by defatting.

  • PDF