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엄현주,신현영,박혜진,김기현,김주형,유광원 한국식품저장유통학회 2022 한국식품저장유통학회지 Vol.29 No.5
We investigated the antioxidant and anti-inflammatory activities in the leaf, stem, and flower of Centella asiatica (CA). CA is widely used in the medical and cosmetic industries. The leaf contained the highest total polyphenol content (236.88 mg%) and antioxidant activity when compared to the stem and flower. The total triterpenoid content was 60.65 mg/g, 54.20 mg/g, and 12.50 mg/g (leaf, flower, and stem, respectively), indicating the triterpenoids in the stem were approximately 4 to 5 times lower than the CA leaf or flower. The cell viability evaluation using RAW 264.7 and HaCaT cells revealed no significant levels of cytotoxicity (≤ 100 μg/mL). The anti-inflammatory activity assessed using RAW 264.7 cells revealed the flower had higher activity than the leaf and stem, with NO (88.3 % - inhibitory rate), TNF-α (64.8 %), IL-6 (65.7 %), and MCP-1 (28.9 %) inhibitory activity. An analysis of the inflammatory inhibition activity on the skin using HaCaT cells revealed the flower possessed a potent activity level of IL-6 (72.0 %) and IL-8 (89.4 %) inhibition. Finally, the flower and leaf had potent physiological effects and functional components. We expect that the leaf and flowers can be used as functional materials, such as antioxidant and anti-inflammatory activities.
엄현주,강혜정,권누리,윤향식,김인재,김영호,송용섭,Eom, Hyun-Ju,Kang, Hye Jeong,Kwon, Nu Ri,Yoon, Hyang-Sik,Kim, In Jae,Kim, Youngho,Song, Yong-sup 한국식품영양학회 2021 韓國食品營養學會誌 Vol.34 No.3
This study examined the quality characteristics of yanggaeng with rice germ; it was incorporated into yanggaeng at different levels (containing 5% rice germ, 10% rice germ, 15% rice germ, and 20% rice germ) based on the total weight of red bean extracts. For analyzing the quality characteristics of yanggaeng, moisture content, hardness, color, antioxidant activity, total polyphenol content, reducing sugar, and vitamin E were determined. There was no significant difference in the moisture content and hardness except in the control. For color, lightness and yellowness of yanggaeng increased as the concentration of the powder was increased, whereas there was no significant difference in redness. As the rice germ powder was increased, total polyphenol content and antioxidant activity increased significantly, whereas reducing sugar decreased. Especially, total vitamin E, including isomers, increased as the concentration of the powder increased from 0.41 mg/100 g to 4.03 mg/100 g. Therefore, it could be possible to develop processed products with functional snack for yanggaeng prepared by adding 10% rice germ.
Notes on a new overlooked taxon of Alnus (Betulaceae) in Korea
엄현주,장계선,김휘,장진성 한국산림과학회 2011 Forest Science And Technology Vol.7 No.1
One new taxon, Alnus incana subsp. tchangbokii Chin S. Chang & H. Kim is described and illustrated here. It is distinguished from its nearest relative, A. incana subsp. hirsuta by having long and large infructescence, broadly rounded leaf base, large terminal bud and fissured bark. A. incana subsp. tchangbokii is known from the mountainous regions of Gyeonggi-do Province, where it grows in deciduous forest montane closed primary forests along ridges at elevations of 200–300 m, while in southern Korea, it is confined to higher altitudes (1000–1300m). Examination of collected specimens suggests A. incana subsp. tchangbokii, be recognized as a subspecies level. An updated key to the four Korean species of Alnus is provided.
엄현주,권누리,정유영,윤향식,김인재,Eom, Hyun-Ju,Kwon, Nu Ri,Jeong, Yoo Young,Yoon, Hyang-Sik,Kim, In Jae 한국식품영양학회 2020 韓國食品營養學會誌 Vol.33 No.5
In this study, to develop balloon flower (Platycodon grandiflorum) leaves, which are not used as tea, a method of making green tea was referred to, and several physiological activities were analyzed using the balloon flower leaf tea with different times of roasting and rubbing. The highest total polyphenol and tannin contents were 33.02 mg GAE/g and 5.03 mg/g at two times of roasting and one time of rubbing, respectively. In the case of the total flavonoids, the RO3 + RU2, subjected to three times of roasting and two times of rubbing, showed the highest value, whereas there was no significant difference between the control and the other samples. Except for the green tea as a control, the RO2 + RU1 samples reported the highest antioxidant activity whereas it decreased with increasing number of times of roasting and rubbing. The color, lightness, and yellowness tended to decrease slightly as the number of increasing roasting and rubbing among the samples with no significant difference. All of these things together, to develop tea using the balloon flower leaves would be suitable with two times of roasting and one time of rubbing.
엄현주,권누리,강혜정,박혜진,김소영,김주형 한국식품영양학회 2022 韓國食品營養學會誌 Vol.35 No.2
The purpose of this study was to examine the quality characteristics of byeolmijang prepared several roasted whole grain powders (oat, brown rice, black soybean, corn) for eight weeks. As the fermentation progressed, the pH decreased from 6.10~6.12 to 4.48~4.92 and the total acidity increased dramatically from 0.41~0.48% to 1.67~2.24%. There were no differences in the moisture content. The content of reducing sugar decreased, in particular, brown rice sample(C) decreased significantly than the other samples during fermentation. In color, L and b-value decreased all samples, whereas a-value showed a tendency to slightly increase. The total cell counts and lactic acid bacteria revealed an increasing tendency during fermentation. In case of the amino-type nitrogen contents, it increased significantly during the fermentation period, especially control sample (A) showed the highest content significantly. The total polyphenol of all samples increased in the fermentation period. ABTS and DPPH radical scavenging activities also increased, especially corn sample (E) had the highest levels. In by electronic tongue analysis, corn sample (E) revealed higher umami and sourness than the control. So, by adding roasted corn powder, it can enhance function and taste of byeolmijang.
엄현주,장계선,장진성 서울大學校農業生命科學大學附屬樹木園 2010 서울大學校 樹木園 硏究報告 Vol.- No.27
A total of 279 species in 173 genera and 68 families are known from Mt. Seongchisan, Mt. Mukbangsan, and Mt. Oeumsan located in Hongcheon area, Gangwon-do. Field collections were conducted three times from May to September in 2009. In all, 280 accessions were made and the identified specimens were deposited in T. B. Lee Herbarium of The Arboretum, Seoul National University (SNUA). This note provides a brief summary of the flora and plant communities of these sites. Festuca rubra L. (Seongchisan), Dryopteris polylepis (Franch. & Sav.) C. Chr. (Mukbangsan), Anemone reflexa Steph. & Willd., Poa nemoralis L. (Oeumsan) represented the 4th conservation priority species according to the Ministry of Environment, Republic of Korea. 홍천군 소권역내 중점조사지역인 성치산, 묵방산, 오음산에서 특정식물종을 포함한 일반식물상을 2009년 5월부터 9월까지 각각 3회 조사를 실시하였으며, 총 68과 173속 279분류군이 분포하는 것으로 조사되었다. 도합 280개의도입이 이루어졌으며, 동정된 표본들은 서울대학교 수목원 수우식물표본관에 보관되고 있다.조사지역에서는 특정식물종 5등급은 확인되지않았으며, 4등급 4분류군, 3등급 6분류군, 2등급 6분류군, 1등급 12분류군으로 모두 28개분류군이 확인되었다. 각 지역에서 확인된 특정식물종을 등급별로 나누어 등급별 종수와 등급별 평가점수를 곱하여 합산한 산지별 평가점수는 묵방산이 74점으로 가장 높았으며, 오음산40점, 성치산 36점 순으로 나타났다. 성치산의경우 더덕재배지가 있어 일반인 출입은 통제되어 있으나, 민가 및 밭농사 등으로 아래지역의식생이 많이 파괴되어 있으며, 산 중턱에는 일본잎갈나무 조림지가 조성되어 있었다. 오음산의 경우는 군부대가 주둔하고 있어 일반인 출입은 거의 확인되지 않았고 특이한 식물은 없었으나 비교적 파괴된 식생이 자연식생으로 빠르게 회복되는 것으로 보였다. 조사 권역에서발견된 환경부 특정식물종 중 4등급에 해당되는 식물로는 왕김의털(성치산, 해발고도 362m), 산비늘고사리(묵방산, 해발 301 m), 회리바람꽃(오음산, 해발 310m)과 선포아풀(오음산, 해발 853m)이 있었다.