• Korean Journal of Food Science and Technology
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• v.29 no.6
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• pp.1213-1221
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• 1997

Effects of the addition of three commercial oligosaccharide syrups into a Korean rice cake (Karedduk) on the textural characteristics and retrogradation of the rice cake were examined during the storage for 5 days at $25^{\circ}C$ and $4^{\circ}C$. Each syrups contained maltose (M75), isomaltose and panose (HL), or maltotetraose (G4) as major sugars. The increment (rates) in gumminess, hardness and chewiness during the storage were significantly reduced by replacing rice flour (up to 10%) with the oligosaccharides. The retardation in the textural changes by the oilgosaccharides was more significant when the rice cake was stored at $25^{\circ}C$ than at $4^{\circ}C$. Among the three types, HL exhibited most effective in retarding the textural changes. Thermograms by a differential scanning calorimeter (DSC) showed that the oligosaccharide increased the onset temperatures and enthalpy for the starch melting, but the recrystallinity measured from the enthalpy ratio before and after the storage was significantly reduced by the presence of the oligosaccharide. Especially with 5% HL, the recrystallinity was significantly low (72.7%) compared to rice cake without HL (88.1%). Therefore, HL had great efficiency in retarding starch retrogradation as well as textural changes of the rice cake during the storage.

• Journal of the Korean Society of Food Science and Nutrition
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• v.12 no.2
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• pp.150-175
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• 1983

The paper is to classify the terms of foods, wines, relish(komyungs), seasonings and cooking processes in Korean cooking books. The results of this study are follows : The dishes which were made from cereals are Bab(boiled cooked rice), Juk(gruel), Miuem(Thin rice gruel), Noodle, Sujebee, Mandu(Pyun su, dumpling), D'ockuk, Pumbok, Yaksik, D'ock(Korean rice cake) etc. The terms of side dishes are Tang (Kuk, Kaeng), Chigae(Jochi Kamjeang, Jijimee, Tugari, Wakjeoji), Jim(Jeung), Sun, Jungol(Abok jaeng ban, sinsulro, punggujigol), Bockum, Kui, Jorim, Cho, Jun(Jijim, Jeenya, Puchigae, Bindae-dock, Nureumi) Jeok(San-jeok, Nuremjeok, Jijimnureumjeok), Hoe (Saenghoe, Sukhoe, Kanghoe, Sujeonghoe, A chae), Mareum chan (Po, Jaban), Changachi (Jangkwa, Sukchae (namul)-Japchae, Kyujachae), Muchim, Sam, Tuigim, Pyunyuk, sundae, suran, Jeockal (Sikhae), Jockpyun, Mal-i, Jihi, Kee, Pojeok, Gimchi etc. The kinds of Jabgwas are Kangieong(Sanja), Yumilgwa, Suksilgwa, Dasik, Jeonggwa, Yeocgangjeong, Gwapyun etc. The kinds of beverages are Hwachaes and Teas. The terms of the wines in Korean cooking bok are 173 kinds. There are 21 kinds of Relish(komyung). There are 12 kinds of Jang, and the terms of the seasonings are as follows: mustard, cinammon, pep per, powder of peppers, powder of sesame, honey, garlic, ginger, sugar, salt, vinegar, syrup, yunjeup, jochung, sesamol-oil, chojeckuk, sesame, greet-onion, powder of black pepper, oil etc. There are 547 kinds of prepared cooking terms, 36 kinds of cutting terms and 34 kinds of boiling term in food making terms.

• Applied Biological Chemistry
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• v.44 no.2
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• pp.88-91
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• 2001

Mixtures of rice and sweet persimmons to make sweet syrup, jochung, were saccharified by barley malt. Soluble solid contents, reducing sugar and free sugar contents, and sensory quality were determined in jochungs, which were prepared from various ratios (10 : 0, 7 : 3, 5 : 5, 3 : 7) of rice to sweet persimmons. Amylase activity had the highest value, 10466 Unit, after 3 hrs during saccharification process at $55^{\circ}C$. In HPLC determination of free sugars, maltose in saccharifying liquids found the highest amount followed by fructose and glucose. With increasing amounts of sweet persimmons, fructose and glucose contents increased while maltose content decreased. The soluble solid contents reduced as the sweet persimmons proportions increased. The control group without sweet persimmons showed highest value, $58^{\circ}Brix$, in soluble solid content. There appeared to be a slight decrease in reducing sugar and free sugar contents as proportion of sweet persimmons increased. Jochung prepared at high amounts of sweet persimmon had better scores in overall acceptance.

• Food Science and Preservation
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• v.23 no.6
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• pp.804-810
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• 2016

This study aimed to compare the quality characteristics of developed rice Jochung (E) with those of commercial-rice Jochung (A, B, C, and D). The total soluble solid, reducing sugar, and dextrose equivalent of developed rice Jochung were $80^{\circ}Brix$, 44.53%, and 56.94%, respectively. The pH and titrable acidity were 6.25 and 0.19%, respectively. The color difference value (${\Delta}E$) of developed rice Jochung was 74.42, which was significantly lower than the other samples investigated. The light transmittance and total polyphenol contents of developed rice Jochung were 56.4%T and 108.23 mg GAE/100 g, respectively. The adhesiveness values of various commercial-rice Jochung products were 29.0~66.0 sec, while that of developed-rice Jochung was 61 sec, showing good textural properties for use in manufacturing Hangwa, a Korean traditional cookie. The electron-donating values of various rice Jochung were 20.4~50.3%, among which the developed-rice Jochung showed the highest value. The reducing powers of various rice Jochung products were 0.44~0.72, while that of the developed product was 0.72, which was significantly higher than the other values. Sensory evaluation revealed that the color scores of developed- and commercial-rice Jochung products were 6.70~6.80. Flavor scores of rice Jochung products ranged from 6.00 to 7.00. Taste and mouth feeling scores of developed-rice Jochung did not significantly differ from those of commercial Jochung products. Compared to commercial-rice Jochung products, developed-rice Jochung made with malt extract exhibited high polyphenols content. However, there were no significant differences in the overall acceptability scores between commercial-rice Jochung products and the developed product. The developed-rice Jochung analyzed in this study may be useful as a traditional sweetener for various Hangwa products as a substitute for corn syrup or Jochung.

• Journal of the Korean Society of Food Science and Nutrition
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• v.11 no.4
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• pp.37-41
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• 1982

In order to determine the optimal condition for making Yugwa (one of the Korean traditional cake) the textures in various conditions were studied by sensory test and texturometer. The changes of texture and fat content in the cake were measured along the period of storage. The results were as follows: (1) The cake were classified in 3 groups according to the leavening agent used in the procedure, namely refined rice wine (W), distilled liquor (L) and yeast group (Y). It was the refined rice wine group that had been 'the best' by sensory test. Its brittleness $(1.40{\pm}0.27)$ was higher than those of L and Y. (2) Crispness measured by bend test prior to soaking into syrup were 1.19, 1.23 and 1.63 in W, L, Y, respectively. (3) Chemical composition (%dry basis)) of Yugwa leavened with W included 9.3 of moisture, 1.3 crude protein, 6.7 crude lipid, 66.4 carbohydrate and 16.3 crude ash. (4) Brittleness decreased gradually along the period of storage while the rancidity increased. From the 40th days of storage, the change of brittleness and rancidity were marked as well as the scores of sensory test decreased significantly. (5) Content of linoleic acid in Yugwa decreased along the period of storage from 52.5% of total fatty acid on the first day to 10.9% on the 50th days Main fatty acids in Yugwa were oleic acid, palmitic acid and stearic acid, all of which were also decreased in content along the period of storage. One remarkable change was the appearance of an unknown fatty acid with 19.54 of retention time, in 50% of total fatty acid, on the 50th day of storage.

• Journal of the East Asian Society of Dietary Life
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• v.23 no.3
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• pp.365-373
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• 2013

This study is performed to investigate the quality characteristics of sulgidduk added with cheonnyuncho fruit powder. Sulgidduk was prepared with freeze-dried cheonnyuncho, rice flour, sugar syrup and salt. The sulgidduk was made with various amounts (0, 3, 6, 9, 12%) of added cheonnyuncho fruit powder. The proximate composition, pH, Hunter's color value, texture profile analysis, sensory characteristics and SEM of cheonnyuncho sulgidduk were being examined. The addition of cheonnyuncho fruit powder has a tendency to decrease the moisture contents of sulgidduk while the crude ash, crude lipid and crude protein increased. The pH of sulgidduk decreased when the amounts of cheonnyuncho fruit powder increased. As the amount of cheonnyuncho fruit powder increased, the lightness (L) decreased, while the redness (a) and yellowness (b) increased. In texture profile analysis, the hardness decreased with increasing cheonnyuncho fruit powder contents, whereas cohesiveness, springiness, gumminess and brittleness increased. The results of sensory evaluation showed that the sulgidduk with 3%, 6% of cheonnyuncho fruit powder got the highest scores on the color, taste, springiness and acceptability. The air cells of sulgidduk observed by SEM were big and uniform with the amount of cheonnyuncho fruit powder increased. In conclusion, these results show that the quality and preference increased when 3%, 6% of cheonnyuncho fruit powder was added to the sulgidduk.

• The Korean Journal of Community Living Science
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• v.15 no.2
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• pp.179-187
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• 2004

The purpose of this study is to investigate the preservation of traditional sesame dasik when stored in different packaging material by comparing its physical and sensorial characteristics. The quality and sensory characteristics of sesame dasik that were evaluated were moisture content, water activity, number of microflora, texture profile, Hunter color different value, and sensory properties (color, chewiness, overall acceptability, etc) during the storage at 35\pm1^\circ{C}$ temperature and $73\pm{2%}$ relative humidity. And the packaging materials were paper boxes (coated 0.02mm thickness polyethylene film), plastic boxes, and oriented polypropylene laminated film. Traditional sesame dasik is made from sesame powder 100g, honey 25g, rice syrup 25g, and table salt 0.5g. During the storage period, the changes in water content and water activity of sesame dasik with different packaging material showed a slight decline. On the other hand, it increased in hardness, and "a" and "b" value of Hunter color difference during the storage. Texture profile analysis data change in hardness was the greatest after the third day in a paper box, and it was affected by the moisture content of dasik and the temperature and relative humidity of the air. Therefore plastic boxes or oriented polypropylene laminated film was found to be better suited than paper boxes for storing sesame dasik.

• Food Science and Biotechnology
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• v.15 no.2
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• pp.298-302
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• 2006

Kochujang was fermented using hot red pepper, meju prepared with soybean and rice, and malt-digested syrup. To reduce salt content, mustard powder (1.2%, w/w) was added to Korean traditional kochujang with 4-10% salt, and microbial characteristics, enzyme activities, and gas formation in kochujang were evaluated during fermentation for 120 days at $25^{\circ}C$. Yeast numbers of all treatments maintained 2.43-2.86 log CFU/g up to 60 days fermentation, indicating salt concentration had no effect on yeast count. Activities of ${\alpha}$- and ${\beta}$-amylases, and neutral and acidic proteases of kochujang added with mustard powder were slightly higher than those of control group. Total accumulative volume of gas produced during fermentation of kochujang without mustard powder (control group) was 5,892 mL/pack, but decreased to 34-99 mL/pack in low-salted kochujang (4 and 6% salt) added with mustard powder. Major gas produced was carbon dioxide (79-80%) with oxygen content less than 1.25%(v/v). Results indicate salt concentration of kochujang could be lowered up to 6-8% by addition of mustard powder without gas formation and quality alteration during distribution.

• Journal of the Korean Society of Food Science and Nutrition
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• v.13 no.4
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• pp.381-388
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• 1984

The objective of this study was to evaluate the effect of the amount of water and several kinds of sweeteners on the texture such as grain appearance, softness, moistness, chewiness, cohesiveness, gumminess and elasticity of Backsulgi when one manufactures Backsulgi. Different amount of water of 30 ml, 60 ml and 90 ml/350 g of powdered rice and such sweetners as sugar, honey and syrup were employed for the experimental treatments. The evaluation of these results were dependent on statistical data of some scores that were obtained through sensory evaluation and Instron Universal Testing Machine. According to this sensory evaluation, the texture of Backsulgi was more affected by the change of water quantity than that of sweeteners. Judging from the results of Instron Universal Testing Machine, it was found that there were no statistically significant differences in each treatment of the cohesiveness, elasticity and hardness of Backsulgi, but some statistically significant difference was observed in each treatment of the gumminess and chewiness of Backsulgi(p<0.05).

• Korean journal of food and cookery science
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• v.29 no.5
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• pp.501-509
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• 2013

This study shows the quality changes of Sulgidduk added Cheonnyuncho fruit powder during storage. Sulgidduk was prepared with freeze-dried Cheonnyuncho, rice flour, sugar syrup and salt. The Sulgidduk, which was made with various amounts (0,3,6,9,12%) of added Cheonnyuncho, was examined by the quality of duration during storage. The pH of Cheonnyuncho Sulgidduk decreased as the amounts of Cheonnyuncho fruit powder increased, and also showed a significant decrease as the storage increased. As the amounts of Cheonnyuncho fruit powder increased, lightness (L) decreased while redness (a) and yellowness (b) increased. During the storage period, the lightness (L) and yellowness (b) were increased, but redness (a) was decreased. In the texture profile analysis, the hardness and springiness were decreased with increasing Cheonnyuncho fruit powder, whereas cohesiveness, gumminess and brittleness were increased. However, the tendency of the changes of characteristics during storage was opposite except for springiness. In conclusion, it is suitable to extend the storage period of Sulgidduk added Cheonnyuncho fruit powder.