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^⁎) and increase in redness (a^⁎) 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.

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.

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.

대추즙을 첨가한 양갱의 제조 및 품질 특성

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.

국산 시판 화이트 와인의 품질특성

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.

연구노트 : 황기청국장의 향기특성

윤향식 ( Hyang Sik Yoon ),최혜선 ( Hye Sun Choi ),주선종 ( Seon Jong Joo ),김기식 ( Ki Sik Kim ),김숙종 ( Sook Jeong Kim ) 한국식품저장유통학회 ( 구 한국농산물저장유통학회 ) 2006 한국식품저장유통학회지 Vol.13 No.2

신규 기능성당 L-아라비노스

윤향식(Yoon, Hyang-Sik),김정호(Kim, Chung Ho),김태집(Kim, Tae-Jip),금인경(Keum, Inkyung),한남수(Han, Nam Soo) 한국식품과학회 2003 한국식품과학회지 Vol.35 No.5

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.

아로니아 분말을 첨가한 식빵의 품질특성

윤향식(Hyang-Sik Yoon),김지원(Ji Won Kim),김상희(Sang Hee Kim),김이기(Yee Gi Kim),엄현주(Hyun-Ju Eom) 한국식품영양과학회 2014 한국식품영양과학회지 Vol.43 No.2

본 연구는 아로니아 분말을 첨가하여 제조한 식빵의 적절한 아로니아 분말 첨가량을 확정하기 위하여 아로니아 분말 첨가량을 밀가루 중량의 1%, 3%, 5% 그리고 10%로 식빵을 제조하여 발효과정 중 이화학적, 생리활성 및 관능적인 특성을 조사하였다. 반죽의 pH는 대조구가 5.45인데 비해 아로니아 분말 첨가구는 그보다 낮은 pH 4.24~5.24로 나타났으며, 반죽의 총산은 발효기간이 경과함에 유의적으로 증가하는 경향을 나타났다. 그러나 빵을 구운 후에는 반죽 때와 유사한 산도를 나타내었다. 식빵의 부피는 대조구가 1,740 mL로 가장 컸으며 굽기 손실률 또한 대조구가 가장 높았다. 생리활성 분석 결과, 총 폴리페놀 함량은 아로니아 분말 첨가량이 증가할수록 유의적으로 높아졌다. 5%, 10% 첨가구는 각각 67.1 mg%, 94.1 mg%로 대조구 28.4 mg%에 비하여 39~66% 증가하는 경향이었고, 항산화성도 아로니아 분말 첨가량에 따른 증가를 보였다. 식빵의 색도는 아로니아 분말을 첨가할수록 명도와 황색도가 유의적으로 낮게 나타났고, 적색도는 증가하는 경향이었다. 기계적 텍스처 측정결과 경도, 점착성 및 씹힘성은 대조구에 비해 첨가구가 유의적으로 증가하였고, 부서짐성, 부착성 및 복원성은 대조구와 비교 시 유의적인 차이는 없었다. 저장성의 경우 대조구는 저장 2일째부터 곰팡이가 검출되었고, 양의 차이는 있었지만 4일째는 모든 실험구에서 곰팡이가 검출되었다. 노화도는 아로니아 분말의 첨가량이 많아질수록 노화가 빨리 진행되었다. 관능검사는 아로니아 분말 첨가 1% 식빵이 향, 조직감, 신맛에서 높게 평가되었으며, 외관, 색, 전반적인 기호도에 대해서는 아로니아 분말 첨가 3% 식빵이 가장 양호하게 나타났다. 종합적으로 생리활성도 높으면서 저장성이 좋고, 관능평가에서 높은 기호도를 보인 아로니아 분말 3% 첨가가 식빵 제조 시 최적 배합비로 판단된다. This study was carried out to investigate the quality characteristics of bread added with Aronia powder. Breads were prepared with different amounts of Aronia powder (in ratios of 0, 1, 3, 5, and 10% of total flour). As the Aronia powder content increased, the pH level decreased while total acidity increased. For color, bread added with 10% Aronia powder showed low lightness and yellowness but high redness. As the Aronia powder content increased, antioxidant activity, total polyphenol content, and baking loss also significantly increased. For the preservation period, breads added with Aronia showed mold growth within 4 days, whereas the control showed growth within 2 days. Bread added with 10% Aronia showed strong retrogradation. In the sensory evaluation, appearance, color, and overall acceptance of bread added with 3% Aronia showed remarkably higher values than both the control and others samples.