• Title, Summary, Keyword: soybean curd

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A Study on the Consumption Patterns of Soybean curd and Processed Soybean Products of Residents in the Kwangwon Area of Korea (강원지역 주민들의 두부 및 대두가공품 이용실태)

  • 김은실;정복미
    • Korean journal of food and cookery science
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    • v.20 no.1
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    • pp.17-25
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    • 2004
  • This study was carried out to investigate the frequency of use, knowledge, purchasing, and degree of perception of processed soybean by residents in the Kwangwon area of Korea. The frequency of use of soybean curd was once per 4∼6 days(37.9%), once per 2∼3 days(31.9%), once per ten days(25.3%) and everyday(4.9%). The degrees of knowledge about soybean curd were a little(56.0%), interest(16.5%), much(14.8%) and no interest(12.7%). 73.9% of respondents had no experience of preparation soybean curd. The frequency of places for the intake of soybean curd were home(83.5%), restaurant(8.8%), tofu restaurant(5.6%) and the others(2.1%). The frequency of places for purchasing of soybean curd were supermarket(59.5%), market(25.0%), the others(9.9%) and department store(5.6%). The degrees of perception of soybean curd types were soybean curd(100%), uncurdled soybean curd(93.7%), soft soybean curd(64.7%), bun soybean curd(15.7%) and seaweed soybean curd(5.2%). The experience on the use of processed soybean of the respondents was highest for soybean curd(98.6%), followed by bean sprouts, soybean paste, soy sauce, soybean oil, soy flour, residue of soybean curd, soy milk, in that order. The most frequent intake experiences of soybean processed products of the subjects were beanpaste pot stew(96.8%), followed by tofu pot stew, tofu and kimchi pot stew, uncurdled bean curd pot stew, bean mixed rice, grilled tofu, in that order.

Quality Characteristics of Sulgidduk with added Soybean Curd Residue Powder (비지분말 첨가에 의한 설기떡의 품질특성)

  • Lim, Sung-Mee;Lee, Goon-Ja
    • Korean journal of food and cookery science
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    • v.22 no.5
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    • pp.583-590
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    • 2006
  • This study was carried out to investigate the acceptable ratio of Sulgidduk with added soybean curd residue powder. The moisture content of Sulgidduk with added soybean curd residue powder (0${\sim}$ 10%) ranged from 40.54 ${\sim}$41.38%, and there were no significant differences between the addition of soybean curd residue powder and control. There were also no significant differences in swelling power and pore ratio from control to the addition of 4% soybean curd residue powder. However, these decreased with increasing addition of soybean curd residue powder of more than 6%. The L (lightness) value decreased with increasing addition of soybean curd residue powder, but the a (redness) and b (yellowness) values increased significantly. As the amount of soybean curd residue powder increased, the hardness, cohesiveness, springiness and gumminess decreased, and, the decrease was especially significant with addition of more than 6%. With increases in the storage period, the hardness, springiness and gumminess increased, while cohesiveness decreased for all additions of soybean curd residue powder. In sensory evaluations, Sulgidduk with the addition of 4% soybean curd residue powder was the most preferred with regard to overall quality. These results indicated that the Sulgidduk with 2% and 4% added soybean curd residue powder exhibited the best quality.

The Study of Textural Characteristics of Soybean Curd Prepared with various Coagulants (각종응고제에 따른 두부의 Texture 특성에 관한 연구)

  • 문수재
    • Journal of the Korean Home Economics Association
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    • v.17 no.1
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    • pp.12-19
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    • 1979
  • Five kinds of soybean curd were propared with five coagulants, such as, calcium sulfate, calcium chloride, magnesium chloride, glucono delta lactone and acetic acid. The products were evaluated by the sensory and objective examination. Optimal concentrations of each coagulant were determined. Soybean curd preparation was also standardized. The textural characteristics of the five soybean curds which were made by the standard recipe were measured by a Texturometer and a Penetrometer. The results were as follows : 1. From the proliminary study, the optimal concentration of coagulants for the soybean curd preparation, as determined by the sensory evaluation was 1.84% of calcium sulfute, 1.05% of calcium chloride. 1.84% of calcium sulfute, 1.05% of calcium chloride. 1.84% of magnesium chloride, 1.97% of glucono delta lactone and 0.48% 11of acetic acid. 2. As the result of the sensory evaluation, the most acceptable soybean curd was determined to be one with acetic acid. Next, in order of accetability , were magnesium chloride, calcium chloride, glucono delta lactone, calcium sulfate soybean curds and commerical soybean curd. 3. Through the objective examination of the five soybean curds by a Texturometer and a Penetrometer, it was found out that, calcium sulfate soybean curd was the hardest and the hardness decreased in order of glucono delta lactone, magnesium chloride, calcium chloride, and acetic acid soybean curd. Acetic acid soybean curd, the most acceptable , was 0.47 TU ; and calcium sulfate soybean curd, the least acceptable, was 1.73 TU.

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Isoflavone Contents and Antioxidative Effects of Soybeans, Soybean Curd and their By-Products (콩, 두부 및 두부부산물중의 Isoflavone함량 및 항산화효과)

  • 배은아;권태완;문갑순
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.26 no.3
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    • pp.371-375
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    • 1997
  • The content of genistein and daidzein which were known to be major antioxidative compounds in soybeans were detected by $C_{18}$ reverse phase HPLC. Most of isoflavones in soybeans were detected in the methanol extract but much less amount of isoflavones in the water extract. Among the four different kind of soybeans, the isoflavone content was highest in brown soybean, followed by yellow, small black and black soybean, in the order. These isoflavones were known to be soluble in hot water, which means transfer of isoflavone content was highest in brown soybean, followed by yellow, small black and black soybean, in the order. These isoflavones were known to be soluble in hot water, which means transfer of isoflavones in soy curd into whey during soy curd processing. To identify the change of isoflavone content during processing of soybean curd, soybean curd were made from yellow, brown and black soybean and isoflavone content were determined in each soybean curd, curd residue and whey. Most of soflavones were remained in the whey, it means most of useful antioxidative compounds were wasted. Thus, it is necessary to develop new technology to collect these isoflavones lost during soybean curd processing.

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Quality Characteristics and Antioxidant Activities of Soybean Curd Products Containing Small Black Soybean (쥐눈이콩을 첨가한 두부제조에 따른 두부, 비지 및 순물의 항산화성)

  • Kim, Joon-Hee;Lee, Young-Tack
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.36 no.11
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    • pp.1431-1435
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    • 2007
  • Soybean curds were prepared by adding different levels (20, 40, and 60%) of small black soybean, and the quality characteristics of the soybean curds were investigated. The yield of soybean curd increased slightly with the increment of the levels of small black soybean, whereas L value (lightness) and b value (yellowness) decreased. Analysis of textural properties demonstrated that the addition of small black soybean lowered the hardness and chewiness of soybean curd, while it slightly increased the cohesiveness and adhesiveness. Antioxidant activities of soybean curd, soybean curd residue, and soybean curd whey were estimated by determining electron donating ability (EDA) to DPPH radical and superoxide dismutase (SOD)-like activity. These activities in all of the samples increased with the addition of small black soybean, especially in soybean curd residue and soybean curd whey; also, soybean curd whey containing small black soybean showed the highest activities.

Effect of Soybean-curd Residues in the Formulated Diet on Growth and Body Composition of Juvenile Flounder (Paralicthys olivaceus) (넙치 (Paralicthys olivaceus) 치어용 배합사료에 콩비지 첨가가 성장 및 체성분에 미치는 효과)

  • LEE Sang-Min;KIM Kyoung-Duck;JANG Hyun-Suk;LEE Yong-Whan;LEE Jong Kwan;LEE Jong Ha
    • Korean Journal of Fisheries and Aquatic Sciences
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    • v.36 no.6
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    • pp.596-600
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    • 2003
  • This study investigated the effect of soybean-curd residues as an ingredient of the formulated diet for juvenile flounder (Paralichthys olivaceus). Three replicates of juvenile fish (averaging weight $1.5\pm0.04\;g$) were fed one of four isonitrogenous $(50\%)$ diets containing $0\%,\;5\%,\;10\%\;and\;15\%$ soybean-curd residues for 7 weeks. Survival, hepatosomatic index and condition factor of the fish were not affected by dietary soybean-curd residues levels. Weight gain, feed efficiency and protein efficiency ratio of the fish fed the diet containing $5\%$ soybean-curd residues were not significantly different to those of the fish fed the control diet, however these values decreased in the fish fed the $10\%\;and\;15\%$ soybean-curd residues (P<0.05). Daily feed and protein intake increased with increasing dietary soybean-curd residues level. Crude protein and lipid contents in the whole body decreased with increasing dietary soybean-curd residues, but no significant differences were observed among control, $5\%\;and\;10\%$ soybean-curd residues diets (P>0.05). Plasma total protein concentration of fish was affected by dietary soybean-curd residues levels (P<0.05). It is concluded that the soybean-curd residues as a substitute for wheat flour can be included up to $5\%$ in the diet for juvenile flounder.

Texture Characteristics of Soybean-Curds Prepared with Different Coagulants and Compositions of Soybean-Curd Whey (응고제를 달리하여 제조한 두부의 텍스쳐 특성과 두부순물의 성분)

  • 이선미;황인경
    • Korean journal of food and cookery science
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    • v.13 no.1
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    • pp.78-85
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    • 1997
  • To determine the optimum coagulants concentrations for preparing soybean-curds, the transmittance of soybean-curd whey using spectrophotometer has been measured. The textural properties of soybean-curds were examined by texture analyzer and sensory evaluations. The general components, oligosaccharides and amino acids in soybean-curd wheys were analyzed. Protein patterns of soybean-curd wheys comparing with soyflour and soymilk were investigated. By texture analyzer, hardness, cohesiveness, springiness, and gumminess of Cacl$_2$ soybean-curd, MgCl$_2$ soybean-curd were higher than those of CaSO$_4$ soybean-curd and GDL soybean-curd. In the sensory evaluations, CaSO$_4$ soybean-curds and GDL soybean-curds were smoother and moister than others. Glutamic acid and aspartic acid were the first two abundant amino acids in three kinds of soybean-curd wheys, but arginine was the most abundant amino acid in GDL soybean-curd whey. Total sugar content of soybean-curd wheys were about 12-13 g/l, and the main sugars among 5 kinds of sugars were sucrose and raffinose. Electrophoresis using SDS-PAGE showed that glycinin and P-conglycinin, the main proteins of soybean appeared in soy flour and soymilk, and only low molecular weight subunits appeared in soybean-curd wheys.

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The Characteristic Changes of Soybean Curds by Addition of Several Types of Protein (여러가지 단백질 첨가로 인한 두부의 특성변화)

  • Pyun, Jin-Won;Hwang, In-Kyeong
    • Korean journal of food and cookery science
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    • v.6 no.3
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    • pp.33-41
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    • 1990
  • This study was conducted to compare the characteristics of the ordinary soybean curd and 3 protein-adding soybean curds (soy protein, casein, gelatin). The sensory evaluation, textural analysis by Instron Universal Testing Machine & the microstructure analysis by SEM for 4 soybean curds were carried out. The results were as follows: 1. In sensory evaluation. 1) The differentiation of soybean curds was greatly explained by `hardness in mouth' through ANOVA test. 2) Discriminant analysis showed that the properties of casein soybean curd were different from those of other three soybean curds by discriminant function I, and the properties of soy protein soybean curd were slightly different from those of ordinary and gelatin soybean curds by discriminant function II. 2. In textural analysis by Instron, protein-adding soybean curds showed significantly lower hardness than ordinary soybean curd. 3. In microstructure analysis by SEM, soy protein soybean curd showed regular, good honeycomb-like network structure and other soybean curds showed lumpy network. The structure of gelatin soybean curd was slightly similar to that of ordinary soybean curd.

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A Study on Development of Menus for Daily Intake of 25g Soybean Protein and Nutrition Analysis of Soybean Food (하루 콩단백질 25g 섭취를 위한 메뉴작성 및 영양성분 분석)

  • 한재숙;김정애;서봉순;이연정;서향순;조연숙;한경필;이신정;오옥희
    • Journal of the East Asian Society of Dietary Life
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    • v.12 no.2
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    • pp.107-122
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    • 2002
  • The purpose of this study was to develop menus for daily intake of 25g soybean protein and to analyse nutrients of these foods. Analytical values were compared to the theoretical one using the flood composition table and recommended dietary allowances for Koreans (7th revision). The results are as follows. 1. Soybean curd residue stew, Soybean curd, Kimchi saute, and hard boiled soybean and lotus root were selected for the menu for January, of which the content of soy bean protein(SBP) was 33.1g, soybean stew, soybean curd and soybean sprout saute, and Italian deep fried soybean curd were fur February, of which the content of SBP was 35.0g. The content of SBP in soybean paste soup with soybean curd, fried soybean curd and fried soybean curd roll, the menu for March, was 24.9g. That of April were soybean curd gratin with soymilk, soybean curd and ham with garlic dressing and the content of SBP was 26.3g. That of May were soybean porridge, soybean flour cake with honey (Dasik), soybean sprout soup and the content of SBP was 26.7g. That of June were soymilk, pan-fried soybean curd, steamed soybean curd with chicken and the content of SBP was 28.4g. That of July were noodle with soymilk, mapatofu, soybean curd salad and the content of SBP was 24.7g. That of August were soybean sprout with mustard dressing, Tossed green pepper with raw soybean flour, Tofu and Kimchi stew, soybean curd steak and the content of SBP was 26.2g. That of September were Chinese cabbage soup with raw soybean flour, sweet and sour tofu and the content of SBP was 23.2g. That of Oct. were Fermented soybean stew, soybean pan cake and the content of SBP was 24.3g. That of November were not-pressed soybean curd casserole, pan-fried mashed soybean curd with egg, stir frying deep-fried soybean curd with vegetables and the content of SBP was 22.4g. That of December were soybean curd and mushroom casserole, fried soybean curd and vegetables, hard boiled soybean curd and the content of SBP was 28.9g. 2. The ratio of the analytical value over theoretical value (A/B%) of one serving in kcal, carbohydrate, protein, fat ash and dietary fiber were 57.7~107.7% 42.9~131.9%, 79.2~118.3%, 54.5~ 100%, 40.7~80.8% and 42.1~113.2%, respectively.

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Physiochemical Characteristics and Antioxidant Activity of Soybean Curd Added with Saltwort (Salicornia herbacea L.) (함초를 첨가한 두부의 이화학적 특성 및 항산화성)

  • Shin, Mi Kyung;Kim, Myung Hee;Hong, Geum Ju
    • Korean journal of food and cookery science
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    • v.29 no.2
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    • pp.123-127
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    • 2013
  • In this study the physiochemical characteristics and antioxidant activity of soybean curd were prepared with saltwort (Salicornia herbacea L.). The moisture and protein of the saltwort soybean curd showed no difference among the samples. Ash and lipid were found to be the highest in the soybean curd to which 20% saltwort was added. The contents of mineral(Fe, K, Mg, Zn) were highest in the soybean curd to which 20% saltwort was added, and Ca content was high in the soybean curd to which 16% and 20% saltwort was added. DPPH (1,1-dipheny1-2-picryl-hydrazyl) radical scavenging activity is a method of measuring the antioxidant power of food; this was high in the soybean curd to which 20% saltwort was added. Adding more saltwort led to higher scavenging activity. From the above results, it could be seen that the soybean curd, which is made by adding saltwort, contributed to enhancing the functionality of antioxidant activation and product quality.