• Title/Summary/Keyword: 반죽

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A Strip Sensor Based on PbO2/Carbon Paste Electrode to Determine Sweetener Contents in Fruits (이산화납/탄소 반죽 전극을 이용한 과당 농도 측정 스트립센서)

  • Lee, Jae Seon;Cho, Joo Young;Heo, Min;Lim, Woo-Jin;Lee, Sang Eun;Nam, Hakhyun;Cha, Geun Sig;Shin, Jae Ho
    • Journal of the Korean Electrochemical Society
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    • v.17 no.2
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    • pp.130-137
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    • 2014
  • A strip sensor based on $PbO_2$/carbon paste electrode was prepared by a screen-printing method, and employed to electrochemically determine the concentration of fruit sweeteners(i.e. glucose, sucrose, and fructose). The $PbO_2$/carbon paste electrode could monitor electrocatalytic oxidation of organic compounds such as carbohydrates, and measure the levels of natural sweeteners without enzyme. Severe interference from ascorbic acid was effectively reduced by modifying the electrode surface with a Nafion membrane. The response level of the Nafion/$PbO_2$/carbon paste electrode increased in the order of fructose, sucrose, and glucose, which corresponds to the order of sweetness perceived by humans.

Effect of Wheat Flour with Bifidobacterium infantis and Streptococcus thermophilus on Rheological Properties of Wheat Flour Dough (Bifidobacterium infantis 및 Streptococcus thermophilus가 밀가루 반죽의 물성적 성질에 미치는 영향)

  • 홍정훈;김경자;방극승
    • Korean journal of food and cookery science
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    • v.16 no.1
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    • pp.22-26
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    • 2000
  • In order to economically utilize dough with B. infantis and S. thermophilus as a bread improver, WHC, swelling power, solubility, farinograph, extensograph and amylograph of dough were investigated. Swelling power and solubility were less than medium flour and weak flour. WHC was higher than those. On rheological properties of dough, farinograms of dough showed progressively increasing water absorption, peak time only increased with addition of S. thermophilus. Extensograms showed that area increased S. thermophilus and B. infantis at 135 min. Extensibility and resistance to exntension of dough were higher in S. thermophilus than those in B. infantis. On amylograms, maximum viscosity of dough increased by addition of B. infantis and S. thermophilus.

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Effects of Cysteine on the Texture and Color of Wheat Flour Noodle (밀국수의 물성과 색에 미치는 cysteine의 영향)

  • 고봉경
    • Korean journal of food and cookery science
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    • v.16 no.2
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    • pp.128-134
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    • 2000
  • Cysteine, a thiol group-containing reducing agent which is known to relax the strain and increase the viscosity of dough, was added to Korean and imported wheat flour noodles to investigate the effect on the properties of raw, dried, and cooked noodles and to determine the optimum cooking time and amount to improve the color of noodles. Addition of cysteine up to 1% of flour (8.25 mmole/100 g flour) was not effective in increasing the brightness of raw and dried noodles and in changing the water activity of dried noodle. However, cysteine improved the brightness of cooked noodle made of both Korean and imported wheat flours. Also, there were notable differences in cooking and sensory properties of cysteine-added cooked noodles such as less firm and stickier texture due to the extraction of organic compounds into broth. When the noodles were cooked for their optimum cooking time, no difference was noticed in the texture and overall preference regardless of the addition of cysteine. Overall, the addition of 1 % cysteine increased the brightness of cooked noodles and reduced the cooking time.

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Quality Characteristics of White Bread Amended with Rosa multiflora Thunberg Extracts with Inhibitory Activity against Helicobacter pylori (Helicobacter pylori 억제효과를 가지는 영실(Rosa multiflora Thunberg) 추출물을 첨가한 식빵의 품질특성)

  • Park, Ki Tae;Woo, Hi Seob;Cho, Young Je
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.41 no.10
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    • pp.1431-1440
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    • 2012
  • The optimum extraction of phenolic compounds from whole Rosa multiflora Thunberg fruits was accomplished using 70% ethanol, which produced extracts that generated a zone of inhibition around Helicobacter pylori of 13 mm when $200{\mu}g/mL$ phenolic compounds were applied. In this study, the quality of white bread baked from dough containing added Rosa multiflora Thunberg extracts was investigated. No deterioration of product quality factors including hydration of wheat flour, formation of dough and internal visual characteristics of dough was observed. However, white bread containing Rosa multiflora Thunberg extracts had a wet texture because of the high moisture level, as well as a high number of irregular bubble holes when compared to the control. Nevertheless, there were no remarkable differences between the sample and the control.

Effect of Onggi on Bread Quality (옹기가 빵 품질에 미치는 영향)

  • Chung, Sun-Kyung
    • KOREAN JOURNAL OF PACKAGING SCIENCE & TECHNOLOGY
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    • v.22 no.1
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    • pp.1-6
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    • 2016
  • How do we use onggi, Korean earthenware, for container of dough during fermentation instead of stainless steel container? How does it affect the flavor of bread if onggi tray is used in baking instead of steel tray? We tried to confirm those. As a result, the characteristics of onggi made positive effect on dough in fermenting room. The time, when the temperature of the center in the dough is equilibrated to that of surface on the dough, take shorter in onggi than in stainless steel. It could make the temperature of dough maintained evenly with little deviation, which could result in shorter fermentation time. Volume and surface color of the bread baked on onggi tray were better than on steel tray. The bread baked on onggi tray got higher score on overall acceptability in sensory test than on steel tray. Therefore, if onggi is used during baking, it could produce better quality of bread like making positive effect on fermented foods.

Effects of Attrition Milling in Wheat Flour on Starch Damaged of Dough and Bread Baking Properties (소맥분 제분시 발생되는 손상전분이 제빵 적성에 미치는 영향)

  • 주옥수;정용면
    • Food Science and Preservation
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    • v.8 no.4
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    • pp.434-441
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    • 2001
  • The purpose of this research is the establishment of optimal processing and the quality improvement of confectionary analysis of the damaged starch content of flour. I studied the rheological and bread making properties of the dough containing different damaged starch content. I examined rheological and physico- chemical characteristic farinograph, extensograph and amylograph with DNS, CWRS and SW containing 6.5%, 8.2%, 9.0%, 9.0% and 10.5% of damaged starch. And I measured the hardness and specific volume and performed the functional survey by rheometer for quality control. In the amylogram, at the damaged starch content 9.5% at such the maximum viscosity was 900 B.U. the volume of bread fermention tolerance were increased. In addition, the extensegram after 135 min showed that maximum resistance of the dough were 570 B.U at the damaged starch contents of 9.5% and the bread had homogeneous air cells and internal structures at the damaged starch contents of 9.5% at which the area(A), resistance(R) and R/E value of the dough were highest.

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Amperometric Electronic Tongue Based on Metal Oxide Containing Carbon Paste Electrode Array (금속 산화물을 포함한 탄소반죽 전극 어레이로 제작한 전자 혀)

  • Han Jong Ho;Kim Dong Sun;Kim Jong Sik;Yoon In Jun;Cha Geun Sig;Nam Hakhyun
    • Journal of the Korean Electrochemical Society
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    • v.7 no.4
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    • pp.206-210
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    • 2004
  • All array of carbon paste-based electrodes was prepared by screen printing the carbon paste modified with metal oxides $(TiO_2,\;RuO_2,\;PbO_2,\;Ni(OH)_2)$ and Prussian blue (PB). An electronic tongue system was assembled with the carbon-paste electrode array, and applied to discriminate the tastes of various commercial beverages and foods by measuring the chronoamperometric responses to the samples diluted in 0.1M carbonate buffer (pH 9.6). The results were analyzed with principal component analysis(PCA) method and plotted on two dimensional PCA coordinate; it was apparent that the amperometric electronic tongue system could discriminate the types of various foods and beverages.

Rheological Properties of Dough with Whole Wheat Flour (전립분 첨가 반죽의 물리적 특성)

  • 김영호;최광수;손동화;김정호
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.25 no.5
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    • pp.817-823
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    • 1996
  • The rheological prouerties of dough were evaluated the dough added whole wheat flour during breadmaking. From the farinogram, water absorption of the dough was decreased as the amount of coarse whole wheat flour was increased. While water absorption of the dough was increased as the amount of fine whole wheat flour was increased. Arrival time and development time of the dough with coarse whole wheat flour were longer than those of fine whole wheat flour. As the amount of whole wheat flour was increased, the weakness was increased. Weakness of coarse whole wheat flour was higher than that of fine whole wheat flour. From the extensograph, extension and resistance to extension were decreased with increasing the amount of whole wheat flour. Resistance to extension of coarse whole wheat flour was higher than that of fine whole wheat flour. From the amylograph, as the amount of whole wheat flour increased, maximum viscosity was decreased gradually. Though the amount of coarse whole wheat flour and fine whole wheat flour was increased up to 30% and 50%, respectively, external characteristics of bread was remained in normal. As the amount of whole wheat flour was increased, the value of whiteness was decreased.

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