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곡류 및 잡곡류를 이용한 팽화과자의 생리 활성 비교연구
윤향식,유리,노재관,김이기,김상희,최송이,한남수,엄현주,Yoon, Hyang-Sik,Yu, Ri,Noh, Jae-Gwan,Kim, Yee Gi,Kim, Sang Hee,Choi, Song Yi,Han, Nam Soo,Eom, Hyun-Ju 한국식품영양학회 2014 韓國食品營養學會誌 Vol.27 No.5
This study was performed to compare the physiological effects of puffed snack on diabetic and geriatric diseases using miscellaneous cereals and grain crops. The puffed snacks were prepared with different amounts of miscellaneous cereals and grain crops (in ratios of 10%, 20%, and 30% of brown rice). Changes in the water soluble index, water absorption index, color, antioxidant activity, total polyphenol content acidity, ${\alpha}$-glucosidase inhibition activity, and sensory evaluation were also determined. As the cereal and crop contents increased, the value of the water soluble index increased while the water absorption index decreased, with the exception of glutinous foxtail and barnyard millets. With respect to color, lightness and yellowness decreased in concert with increases in the cereal and crop contents, whereas redness increased. Furthermore, the antioxidant activity and total polyphenol content as well as ${\alpha}$-glucosidase inhibition activity increased remarkably with increasing concentrations of sorghum. There was no significant difference in the physiological activities depending on the addition of millet, barley and barnyard millets. In sensory evaluation, the puffed snacks containing sorghum, millet, and glutinous foxtail millet received higher values than other samples. Altogether, our results indicate that puffed snacks containing 10~20% sorghum could be suitable as ingredients for improving sensory and physiological activities in diabetic and geriatric diseases.
수수 코지 첨가량에 따른 속성장의 이화학적 품질 및 생리활성
윤향식,강혜정,엄현주,김소영,김인재,김영호,송용섭,Yoon, Hyang-Sik,Kang, Hye Jeong,Eom, Hyun-Ju,Kim, So-Young,Kim, In Jae,Kim, Youngho,Song, Yong-sup 한국식품영양학회 2021 韓國食品營養學會誌 Vol.34 No.2
This study analyzed the quality characteristics of Soksungjang combined with sorghum koji, according to the amount of sorghum added and the length of the fermentation period. The moisture content of Soksungjang was the lowest in the control group when there was no sorghum koji added, but gradually increased as the amount of added sorghum koji increased. The reduction in the sugar content of sorghum Soksungjang did not change according to the fermentation period of the control group, but increased alongside the fermentation period when sorghum koji was added to Soksungjang. The amino nitrogen content increased from 67.20-80.73 mg% from the beginning of the fermentation period to 173.13-383.60 mg% at the end of the fermentation period, and the total polyphenol content increased from 260.25-351.28 mg% from the beginning of the fermentation period to 567.28 mg%-674.93 mg% to the end of the fermentation period. DPPH radical scavenging activity also increased as the fermentation period elapsed, and ABTS radical scavenging activity increased and then decreased slightly over the fermentation period. The antioxidant activity was the highest in the Soksungjang mixture with a 10% concentration of sorghum koji.
흑도라지 추출물을 첨가한 설기떡의 품질 특성 및 항산화 활성
윤향식,강혜정,엄현주,김영호,Yoon, Hyang-Sik,Kang, Hye Jeong,Eom, Hyun-Ju,Kim, Youngho 한국식품영양학회 2019 韓國食品營養學會誌 Vol.32 No.6
In this study, sulgidduk was prepared by addition of varying amount of black doraji extract and the physicochemical quality characteristics and antioxidant activities were investigated in order to explore the commercialization potential of sulgidduk supplemented with black doraji extract. The moisture content of sulgidduck supplemented with black doraji extract exhibited a significant decrease compared to the control. The pH of sulgidduck tended to decrease with increasing concentration of black doraji extract, and the reducing sugar content increased significantly from 0.33% to 3.51%. With an increase in the content of black doraji extract, a decrease in lightness (L<sup>⁎</sup>) and increase in redness (a<sup>⁎</sup>) was observed. A significant increase in the total polyphenol content and antioxidant activity (DPPH and ABTS radical scavenging activity) was observed with the addition of the black doraji extract. Consequently, it is proposed that black doraji extract can be used for recipe development and commercialization of various rice cakes.
윤향식,박정미,박혜진,정창원,최원일,박재호,김시동,Yoon, Hyang-Sik,Park, Jung-Mi,Park, Hyejin,Jeong, Changwon,Choi, Wonil,Park, Jaeho,Kim, Sidong 한국식품영양학회 2016 韓國食品營養學會誌 Vol.29 No.4
This study was carried out to evaluate the quality characteristics of Korean domestic commercial white wines. Four sample wines were analyzed in terms of their pH, total acidity, volatile acidity, alcohol content, soluble solid, free $SO_2$, total $SO_2$, color, free sugar content, organic acid, volatile compounds, total polyphenol content, DPPH radical scavenging activity and sensory characteristics. The pH of wines ranged from 3.06 to 3.76 and their total acidity from 0.43 to 0.83% (v/v). The alcohol content of samples ranged from 9.4 to 12.8% (v/v) and their soluble solid contents from 9.9 to $12.3^{\circ}Brix$. The free $SO_2$ and total $SO_2$ contents of the W1 wine were lower than those of the other wines, while the color intensity, a (redness) and b (yellowness) of W1 wine were higher than the values of the other wines. The malic acid contents of the four wines indicated that complete malolactic fermentation (MLF) occurred in W1, incomplete MLF in W3, and was absent in W2 and W4. Aroma analysis resulted in identification of 10 alcohols, 11 esters, 2 ketones and 6 miscellaneous compounds. 2,3-Epoxybutane and 1-(ethenyloxy)-pentane levels in were significantly higher W1 than the other wines, while several types of ester predominated in W2, W3 and W4. W1 had the lowest sensory score among the four wines. Therefore, the quality characteristics of domestic white wines are considered to be acceptable.
윤향식,정은지,권누리,김익제,홍성택,강효중,엄현주,Yoon, Hyang-Sik,Jeong, Eun Ji,Kwon, Nu Ri,Kim, Ik Jei,Hong, Seong Taek,Kang, Hyo-Jung,Eom, Hyun-Ju 한국식품영양학회 2018 韓國食品營養學會誌 Vol.31 No.6
This study was carried out to investigate the quality characteristics of yanggaeng added with jujube extracts. The jujube extracts were incorporated into yanggaeng at different levels (containing 25%, 50%, 75%, and 100% jujube extracts) based on the total weight of water. To analyze the quality characteristics in the manufacture of yanggaengs, pH, moisture content, density of dough, height, specific volume, baking loss, texture, color, antioxidant activity, total polyphenol content, and sensory test were determined. As the content of jujube powder increased, the pH of yanggaengs decreased but the acidity increased. There was no significant difference in the moisture content depending on the addition of jujube extracts. The color, lightness and redness of yanggaengs decreased as the concentration of the extract increased, whereas the yellowish color increased. As the jujube extracts content increased, total polyphenol content, antioxidant activity, reducing sugar and total tannins significantly increased. The yanggaeng contains jujube extract with acceptable sensory properties, such as color, sweet taste, and overall acceptability, which could be integrated into yanggaengs to meet the taste and functional needs of the consumers.
충북지역 된장의 발효기간 중 이화학적 품질 및 향기 특성
윤향식,이상희,강혜정,엄현주,김영호,Yoon, Hyang-Sik,Lee, Sang Hee,Kang, Hye Jeong,Eom, Hyun-Ju,Kim, Youngho 한국식품영양학회 2019 韓國食品營養學會誌 Vol.32 No.6
The purpose of this study was to investigate the quality characteristics of Doenjang made by seven different traditional soybean paste manufacturers, in Chungbuk province during fermentation. The moisture content of Doenjang declined in the process of fermentation, from 58.07~68.86% to 52.32~63.79%. The salinity increased from 7.47~14.38% to 10.42~17.73%. Sample B was the lowest, and G was the highest. The pH showed a tendency to decline from 5.36~6.22 to 4.30~5.66 except for sample F, which increased 6.33~7.10. In contrast, the total acidity showed a tendency to increase from 0.56~1.77% to 1.11-1.83% except for sample F, which declined 0.71%~0.54%. The lightness declined from 44.33~55.90 to 26.68~49.66. However, the redness and the yellowness generally increased. The content of amino type nitrogen generally increased with the progress of fermentation from 93.33~408.80 mg/kg to 314.07~1,258.13 mg/kg and sample D, with Aspergillus oryzae added, was the highest. The volatile flavor compounds of Doenjang had 10~20 types. Sample D had the fewest number of volatile flavor compounds (10 types of compounds), and sample C had the largest number of it (20 types of compounds). Four types of compounds, ethanol, 3-methyl butanal, ethyl acetate, and 3-methyl butanoic acid, were detected from all samples.
포도 숙성 정도에 따른 청포랑 화이트 와인의 향기 및 품질 특성
윤향식 ( Hyang-sik Yoon ),정창원 ( Changwon Jeong ),박혜진 ( Hyejin Park ),박정미 ( Jung-mi Park ),최원일 ( Wonil Choi ),김시동 ( Sidong Kim ) 한국식품영양학회 2017 韓國食品營養學會誌 Vol.30 No.4
To investigate the aroma and quality characteristics of wine bestowed by the degree of ripening of Cheongporang grapes, the general quality composition, color, organic acid, physiological activity, aroma component and sensory evaluation were analyzed. The general characteristics of the wine assessed were pH 3.34~3.50, total acidity 0.46~0.67%, color intensity 0.074~0.116, lightness 98.99~99.74, redness -0.39~0.01, and yellowness was 1.52~3.10. Malolactic fermentation was not relative to the contents of malic acid and lactic acid. The total polyphenol content and antioxidant activity were lowest in C3 wines made with ripe grapes and highest in C4 wines made with mixed grapes. Aroma analysis identified 6 alcohols, 15 esters and 5 miscellaneous compounds. Compounds with higher odor activity value (OAV) were 3-methyl-1-butanol, ethyl butanoate, isopentyl acetate, ethyl hexanoate, ethyl octanoate, ethyl decanoate and octanoic acid. The C4 wine, a mixture of grapes with different degrees of ripening, had the highest ester content and ratio. The lowest values were found in the C3 wine made with ripe grapes. Results of the sensory evaluation related the C4 wine, containing a large amount of ester compounds having high OAV values as the aroma component, as the best and most preferred wine.