• Title/Summary/Keyword: Amylograph

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Studies on the Change of Components with Long-Term Storage of paddy (장기저장 미곡의 성분변화 특성)

  • 김영수
    • The Korean Journal of Food And Nutrition
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    • v.12 no.4
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    • pp.409-414
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    • 1999
  • In order to investigate the changes of rice qualities during 4 years storage of paddy stored in ware-house of normal temperature condition. Temperature in warehouse was changed more than 3$0^{\circ}C$ under the influence of average temperature outside of a warehouse. Water content of paddy was not increased over 15% But as average temperature in warehouse was gone up 18$^{\circ}C$ from June to September every years it was supposed that these periods were to be deterioration of rice quality. On investigation of change in paddy it was supposed that these periods were to be deterioration of rice quality. On investigation of change in paddy components during the long term storage, reducing, sugar, amylose, crude protein were increased 0.24%, 19.23%, 7.02% at enterance time to 0.5%, 20.31% 7.46% 4 years later respectively. Max viscosity final visocity and set back value by amylograph were increased 449B,U 610B.U, 161B.U to 493B.U, 715B,U 222B.U but breakdown was decreased 125B.U to 76B.U with the increase of storage period. Gel consistency of rice stored was decreased 44.7mm at enterance time to 39,9mm 4years later. Fatty acid was increased remarkably 4.5KOHmg/100g to 24.4KOHmg/100g. Germination ratio and germ activity of paddy during long-term storage were decreased 97%, 100% to 0%, 0.4% respectively, With the increase of storage period contaminated paddy by molds increased and its by bacteria decreas-ed.

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A Study on the Preparation of Dried Noodle Made of Composite Flours Utilizing Rice, Wheat and Gelatinized Waxy Rice Flours (호화찹쌀가루를 이용한 쌀가루 복합분의 제면성 시험)

  • Park, Wook-Hee;Kim, Hyong-Soo
    • Journal of Nutrition and Health
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    • v.15 no.2
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    • pp.83-90
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    • 1982
  • This study was attempted to investigate the effects of adding gelatinized waxy rice flour, wheat flour, and Xanthan Gum to rice flour on the preparation and (quality) of dried noodles. 1) Rice flour demonstrated higher maximum viscosity value as determined by Amylograph than wheat flour. Among the composite flour mixture (Rice Flour 85+Gelatinized Waxy Rice Flour 15 + Xanthan Gum 2%) showed the highest viscosity value and (RF 35+ GWRF 15 + Wheat Flour 50) had the lowest. (RF 35 + GWRF 15 +WF 50) demonstrated gelatinization characteristics which is quite similar to that of wheat flour. 2) Forty and 50% replacement of rice flour and gelatinized waxy rice flour (15%) mixture by wheat flour improved significantly noodle making characteristics and cooking quality of noodles. 3) The addition of 2% XG to (RF 45 + GWRF 15 + WF 40) was effective on noodle making properties and on binding properties of cooked noodles. 4) The cooked noodle made of composite flour (RF 45 + GWRF 15 + WF 40 + XG 2%) received the highest total sensory evaluation score among the testing samples, and it was not significantly different from that of wheat flour.

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Studies on Rheological Properties of Dough and Stability of Frozen Dough (밀가루의 이화학적(理化學的)인 성질(性質) 및 냉동(冷凍)반죽의 안정성(安定性))

  • Suh, Sook Chool;Song, Hyung lk;Chung, Ki Taek
    • Current Research on Agriculture and Life Sciences
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    • v.5
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    • pp.75-80
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    • 1987
  • We investigated physico-chemical properties of hard wheat flours for frozen yeast-raised breadmaking and freezing stability of frozen dough prepared by the straight no-time method. The general Composition of wheat flours were : moisture ; 14.0%, ash ; 0.48%. protein ; 13.15%, and dry gluten ; 13.43%. In farinograph data, development time and water absorption were 5.5 mimutes and 62 %, respectively. Amylograph maximum viscosity was 500 BU. Resistance to extention increased with the time and their extensibility decreased in the extensigraph data. From these results obtained from these physico-chemical properties, it was confirmed that the used wheat flours were most suitable for bread-baking. Considering effect of gassing power on cold storage period and fermentation time, it was effective that dough temperature should be adjusted to $20^{\circ}C$ in order to decrease freezing injury and maintain freezing stability.

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Rheological Properties of Dried Noodles with Added Enteromorpha intenstinalis Powder (파래 분말을 이용한 국수의 이화학적 물성에 관한 연구)

  • Cho, Hee-Sook
    • Journal of the East Asian Society of Dietary Life
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    • v.20 no.4
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    • pp.567-574
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    • 2010
  • This study was performed to evaluate the physicochemical and quality characteristics of dried noodles when different concentrations of Enteromorpha intenstinalis powder (EIP) were added to the wheat flour, thereby determining which noodle recipe was preferred. The cooking quality, mechanical texture properties, and viscosity of the prepared with noodles were measured, and then a sensory evaluation was conducted on them. The gelatinization points of the composite Enteromorpha intenstinalis powder-wheat flour were shown to have an increased viscosity at $95^{\circ}C$ after 15 minutes. As measured via amylograph, the maximum viscosity values of those samples decreased with increasing EIP content. Also, when increased amounts of EIP were added, both the L and b values were reduced, whereas the a value was increased. The color values, weight and volume of the cooked noodles increased, as did the turbidity of the soup. With regard to the textural characteristics, the EIP additive increased hardness and reduced adhesiveness, cohesiveness and springiness. Overall, according to the results of our sensory evaluations, the noodles prepared with 5% EIP were preferred over other noodles.

Effect of Heating Conditions on Apparent Viscosity of Cowpea Sediment Dispersions (가열조건에 따른 동부 앙금 호화액의 겉보기 점도)

  • 이애랑;김성곤
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.23 no.5
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    • pp.822-826
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    • 1994
  • Effects of concentration(6-9%, db) , heating temperature (80-95$^{\circ}C$), cooking time (10-50min) and heating method (continuous and instantaneous) on the apparent viscosity of cowpea sediment dispersions at 6$0^{\circ}C$ were investigated. The instantaneous heating resulted in higher apparent viscosity than continuous heating regardless concentrations and heating temperatures. The activation energy of the increase rate constant of the apparent viscosity was about 8 kcal/mole. The apparent viscosity of the cowpea sediment dispersion heated to 95$^{\circ}C$ and held for 20 min showed a linear relation with the 20 min height at 92.5$^{\circ}C$ by viscoamylograph.

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Rheological Properties of Dough Added with Wheat Bran (밀기울 첨가 반죽의 물리적 특성)

  • 김영호
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.27 no.6
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    • pp.1125-1131
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    • 1998
  • The rheological properties of wheat flour dough were investigated in the dough added with 0, 10, 15, 20, 25 and 30% of wheat bran. The ratios of ash contents in wheat flour and wheat bran were 0.43% and 5.28%, respectively. The ratios of fiber contents in wheat flour and wheat bran were 0.18% and 11.86%, respectively. The farinograph water absorption was increased as the amount of wheat bran was increased. Both arrival time and development time of the dough added with wheat bran were longer than those of wheat flour. As the amount of wheat bran was increased, the weakness was increased. The extensograph showed that extensibility and resistance to extension of dough were decreased, while the ratio of resistance to extensibility(R/E) was increased with increasing the amo unt of wheat bran. The maximum viscosity by amylograph was decreased gradually with the adding amount of wheat bran, while the gelatinization temperature was slightly increased with wheat bran.

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Quality Characteristics of Dumpling Shell made with Capsosiphon fulvescens Powder (매생이 분말을 이용하여 제조한 만두피의 품질특성)

  • Park, In-Duck
    • Journal of the Korean Society of Food Culture
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    • v.31 no.3
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    • pp.243-249
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    • 2016
  • The purpose of this study was to investigate the effects of Capsosiphon fulvescens powder on the functional and sensory characteristics of dumpling shell. Various dumpling shell samples were prepared with wheat flour along with the addition of different amounts of Capsosiphon fulvescens powder, and then instrumental characteristics and sensory evaluations were investigated. According to amylograph data, the composite Capsosiphon fulvescens powder-wheat flour samples had increased gelatinization temperatures with increasing Capsosiphon fulvescens powder content; whereas initial viscosity at $95^{\circ}C$, viscosity at $95^{\circ}C$ after 15minutes, and maximum viscosity were reduced. In terms of Hunter's color values, L, a and b values decreased with increasing Capsosiphon fulvescens powder content. Besides cooked weight, cooked volume and turbidity of dumpling shell increased as the addition level of Capsosiphon fulvescens powder increase. In terms of textural characteristics, addition of Capsosiphon fulvescens powder increased springiness, chewiness, brittleness, pringiness and adhesiveness. Based on sensory evaluations, the overall preference of dumpling shell with 3% added Capsosiphon fulvescens powder, was more effective than control.

Bread Properties Utilizing Extracts of Mume (매실(Prumus mume Sieb. et. Zucc)추출물을 이용한 제빵 적성)

  • 이연화;신두호
    • The Korean Journal of Food And Nutrition
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    • v.14 no.4
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    • pp.305-310
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    • 2001
  • In order to study bread properties utilizing extracts of fume, mume bread was baked, adding 0, 0.5, 1.0. 1.5 and 2.0 brix of mume extract to wheat flour. The rheological properties, dough pH, dough volume, bread volume, bread color. bread texture and sensory evaluation were tested to examine bread properties baked adding extracts of mume. The results are as follows: The maximum viscosity measured by amylograph decreased gradually with increasing fume extract concentration, while the gelatinization temperature was going up. The development time measured by farinograph increased with use of mime extract, but stability time decreased. After the first fermentation, dough volume decreased greatly under pH 4.0, and there was same tendency in loaf volume. Lightness and redness of the crumb decreased but yellowness increased. Hardness and fracturability of mume bread were lower than control. In sensory evaluation, fume bread with 0.5 brix muse extract was evaluated as the best in taste, texture, flavor and overall acceptability.

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Quality Characteristics of Seolgiddeok added with Broccoli(Brassica oleracea var. italica Plen.) Powder (브로콜리 분말을 첨가한 설기떡의 품질 특성)

  • Cho, Kyung-Ryun
    • The Korean Journal of Food And Nutrition
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    • v.22 no.2
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    • pp.229-237
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    • 2009
  • Physical, textural and sensory properties of Seolgiddeok prepared with different amounts of broccoli(Brassica oleracea var. italica Plen.) powder were investigated during 3 days of storage. Moisture content decreased gradually during storage and was less in broccoli powder-amended samples. The color L value decreased significantly with increasing broccoli powder, whereas both redness and yellowness increased. Texture analyses revealed that hardness, chewiness, gumminess, adhesiveness and fracturability of Seolgiddeok tended to decrease in proportion to the amount of broccoli powder in the formula. Seolgiddeok gelatinization was investigated using amylographing. Break down and setback were low in broccoli powder Seolgiddeok. Sensory evaluations revealed that, Seolgiddeok prepared with broccoli powder was superior in flavor, chewiness, softness to unamended samples. Seolgiddeok prepared with 3% broccoli powder showed the highest overall acceptability score. Use of broccoli powder in Seolgiddeok preparation improves sensory characteristics and delays retrogradation.

감초(Glycyrrhiza uralensis Fiscch)추출물이 밀가루 물성 및 빵의 품질에 미치는 영향

  • 최영주
    • Culinary science and hospitality research
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    • v.2
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    • pp.183-207
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    • 1996
  • This study is to investigate the effect on the quality and properties of bread affected by licorice extract addition. The measurements of the farinograph, extensograph and amylograph on dough are carried out. And the evaluations of volumetric changes during fermentation, shape of bread crumb, sensory test, firmness are obtained. The obtained results are as follows. 1. Proximate compositions of licorice extract are as follows: moisture 73.7%, crude protein 4.1%, crude lipid 2.8%, crude ash 1.4%. 2. Water absoorption, arrival time dough development time mechanical tolerence index and valorimeter value are increased but stability is decreased with the addition of licorice extract. 3. The resistance to extension is increased but extensibility is decreased with the addition of licorice extract. 4. The initial pasting and highest viscosity temperatures are not affected but the highest viscosity is steepy decreased over 1.0% addition of licorice extract. 5. The volume of dough during fermentation and specific volume of bread is decreased with the addition of licorice extract. 6. The grain of bread is to be rough and irregular and the firmness is increased with the addition of licorice extract. 7. The records of sensory test are decreased with the addition of licorice extract.

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