[P3-111] Quality Characteristics and Changes in GABA Content and Antioxidant Property of Noodle Prepared with Germinated Brown rice

Suhyun Kong,Junsoo Lee,Sea Kwan Oh,Areum Chun,Mi Ra Yoon,Ha Chul Hong,Dae-Jung Kim 한국식품영양과학회 2009 한국식품영양과학회 학술대회발표집 Vol.2009 No.11

발아현미 첨가에 따른 국수의 제조 특성과 GABA 함량 및 항산화 활성 변화

공수현(Suhyun Kong),이준수(Junsoo Lee) 한국식품영양과학회 2010 한국식품영양과학회지 Vol.39 No.2

발아 전과 후의 현미와 미강을 첨가한 밀가루 복합분으로 만들어진 국수의 품질 특성과 GABA 함량 및 항산화 활성의 변화를 조사하였다. 발아 전후의 현미와 미강을 각각 5, 10, 15% 첨가하여 국수를 제조하였다. 이렇게 제조된 국수는 조리 및 제면특성(cooking loss, swelling index, water holding capacity), 조리에 따른 GABA 함량과 항산화 성분(polyphenol) 및 활성(ABTS와 DPPH의 radical scavenging activities) 변화를 통해 기능성 국수로의 이용가능성을 알아보고자 하였다. 실험결과, 발아 후 rice bran의 첨가에 따른 cooking loss가 증가하는 것으로 관찰되었으며 반면에 swelling index에서는 차이를 나타내지 않았다. 발아 후 현미와 미강을 첨가한 조리 전후 국수에서 발아 전 현미와 미강을 첨가한 국수보다 높은 GABA 함량을 확인하였으며 발아에 따른 polyphenol 함량과 항산화 활성에서는 큰 변화가 없음을 확인할 수 있었다. 따라서 발아현미가 첨가된 국수는 밀가루 국수의 영양학적 가치와 항산화 기능을 향상시킬 수 있는 소재로써 이용 가능할 것으로 생각된다. This study was to investigate the quality characteristics of noodles prepared with germinated brown rice and rice bran, and to determine the changes in GABA content and antioxidant activity of the noodles. These noodles were evaluated for cooking properties (cooking loss, swelling index, water holding capacity), total polyphenols, antioxidant activities (radical scavenging of ABTS and DPPH), and GABA contents. The addition of germinated rice bran in the range of 5, 10, and 15% showed a significant influence on cooking loss, although no effect on swelling index was observed. The raw and cooked noodles containing germinated brown rice and rice bran contained more GABA contents (2751.6~4176.7 and 5522.0~9617.8 nmol/20 g of fresh noodle, respectively) than those of non-germinated brown rice and rice bran. Noodles made with germinated brown rice and rice bran had similar total polyphenolics contents and antioxidant activities compared to noodles made with non-germinated brown rice and rice bran. Overall, the germinated brown rice could be used as a good ingredient to increase the nutritional value and antioxidant properties of wheat flour noodle without affecting the cooking properties.

흑미의 도정분획 메탄올 추출물의 항산화 성분 및 항산화 효과

공수현(Suhyun Kong),최용민(Youngmin Choi),이선미(Seon-Mi Lee),이준수(Junsoo Lee) 한국식품영양과학회 2008 한국식품영양과학회지 Vol.37 No.7

본 연구에서는 흑미 두 품종(흑진주벼와 흑광벼)의 도정 분획별 메탄올 추출물의 항산화 성분과 항산화 활성을 비교ㆍ분석하고자 하였다. 흑미의 항산화 성분으로 polyphenolic, flavonoid, anthocyanin과 γ-oryzanol, tocopherol 및 tocotrienol 함량을 측정하였으며 항산화 활성은 DPPH와 ABTS radical 제거능을 측정하였다. 각 도정 분획별 메탄올 추출물에서 rice bran 층에서 약 15.3~15.5%의 가장 높은 수율을 보였으며 endosperm 메탄올 추출물에서 약 0.9~1.1%의 가장 낮은 수율을 보였다. 실험결과 rice bran의 추출물에서 endosperm, whole grain의 추출물보다 높은 함량의 항산화 성분이 분포함을 확인할 수 있었다. 또한 이러한 항산화 성분이 다량 분포하는 rice bran 추출물의 우수한 항산화력을 측정할 수 있었다. 품종 간에는 흑진주벼의 rice bran 층의 항산화 성분이 흑광벼보다 높은 함량을 나타내었다. 본 연구결과 흑미의 rice bran은 기능성식품의 성분으로 활용가능성이 높을 것으로 예상된다. The colored rice, particularly black rice, has been well characterized to possess antioxidant properties. Rice bran, a by-product of the rice milling process, contains high levels of several phytochemicals which have antioxidant activities as well as health-beneficial properties. The purposes of this study were to evaluate the antioxidant compounds and antioxidant activities of the methanolic extracts from milling fractions and whole grain of two black rice cultivars. Whole black rice of the two cultivars were milled into rice bran and endosperm using the gradual milling system. These were evaluated for antioxidative activities by DPPH and ABTS radical scavenging activities. To determine the antioxidant compounds in the methanolic extract from the milling fractions, the content of polyphenolics, flavonoids, anthocycanins and γ-oryzanol were measured by spectrophotometric methods and vitamin E analysis was carried out by HPLC. The yield of whole black rice, rice bran, and endosperm were 3.1, 15.3, and 0.9% for Heugjinjubyeo and 2.7, 15.5, and 1.1% for Heugkwangbyeo, respectively. The methanolic extracts from rice bran showed generally higher antioxidant activities than the extracts from whole grain and endosperm. In addition, antioxidant compounds distributed much higher contents in rice bran extract than in the extracts from whole grain and endosperm. A significant correlation was also noted between free radical scavenging activity and polyphenolic compounds. The results of this study show that notable antioxidant activity in black rice bran are considered to have significant health benefits.

금종쌀 Methanol 추출물의 항산화 성분 및 항산화 효과

공수현(Suhyun Kong),최용민(Youngmin Choi),김영화(Youngwha Kim),김대중(Dae-Jung Kim),이준수(Junsoo Lee) 한국식품영양과학회 2009 한국식품영양과학회지 Vol.38 No.6

본 연구에서는 도정되지 않은 현미상태의 금종쌀(Geumjong brown rice) methanol 추출물의 항산화 성분과 항산화활성을 측정하여 새로운 품종의 기능적 가치를 평가하고자 하였다. 이와 함께 백미(Chuchung white rice) 및 현미(Chuchung brown rice)와의 항산화 성분과 항산화력을 비교ㆍ분석하고자 하였다. 항산화 성분으로는 polyphenol, flavonoid, vitamin E와 γ-oryzanol을 측정하였으며 항산화력은 ABTS와 DPPH 라디칼 제거능 및 환원력을 측정하였다. 백미 및 현미, 금종쌀은 각각 1.5, 2.3, 그리고 3.5%의 추출수율을 나타냈다. 실험결과, 금종쌀은 높은 항산화 활성(69.77 ㎎ TEAC/100 g)과 polyphenol함량(69.1 ㎎ gallic acid equivalents/100 g)을 나타냈다. 반면에 환원력에 있어서는 현미(Chuchung brown rice)보다 낮게 측정되었다. In this study, the antioxidant compounds and antioxidant activities of Geumjong brown rice were measured to evaluate functional properties and to compare with white rice and Chuchung brown rice. The content of polyphenolics, flavonoids and γ-oryzanol were measured by spectrophometric methods and tocopherol and tocotrienol analyses were carried out by HPLC. ABTS and DPPH radical scavenging activity and reducing power were used to measure antioxidant activity. The extraction yield of Chuchung white rice, Chuchung brown rice, and Geumjong brown rice were 1.5, 2.3, and 3.5%, respectively. The high level of antioxidant activity (69.77 ㎎ TEAC/100 g) and total polyphenolic content (69.1 ㎎ gallic acid equivalents/100 g) were found in Geumjong brown rice, whereas the reducing power of Geumjong brown rice was lower than that of Chuchung brown rice.

고효율 복합계 블레이드를 사용한 500W급 풍력터빈에 관한 연구

공창덕(Changduk Kong),최수현(Suhyun Choi),박현범(Hyunbum Park) 한국항공우주학회 2009 韓國航空宇宙學會誌 Vol.37 No.2

최근 화석 연료가 고갈됨에 따라 대체 에너지 개발 연구가 활발히 진행되고 있다. 여러 대체 에너지들 중 풍력 발전시스템은 바람의 에너지를 전기적 에너지로 바꾸어 주는 시스템으로 매우 친환경적이기 때문에 다양하게 연구되고 있다. 따라서 본 연구에서 500w급 소형 풍력 발전용 블레이드의 개발을 통해 외국에 비하여 상대적으로 풍속이 낮은 국내와 같은 지역에 적용할 수 있는 블레이드 설계를 수행하였다. 본 논문에서는 피로수명을 고려한 고효율 경량화 블레이드의 공력설계 및 구조설계 방법이 제안되었으며, 구조해석으로 선형 정적해석, 좌굴해석, 진동모드해석이 수행되었다. 이론적 해석 결과를 입증하기 위하여 구조 시험 및 공력 성능 시험 결과 비교적 잘 일치하며 설계 요구 조건을 만족함을 확인하였다. Recently, the wind energy has been widely used as a renewable energy resource due to lack and environmental issues of the mostly used fossil fuel. This work is to develop a 500W class small wind turbine blade which will be applicable to relatively low speed region like Korea and for the domestic use. For this blade a high efficiency wind turbine blade was designed with the proposing aerodynamic design procedure, and a light and low cost composite structure blade was designed considering fatigue life. Structural analyses including load case study, stress, deformation, buckling and vibration analysis were performed using the Finite Element Method. The fatigue life was estimated using the load spectrum analysis and the Miner rule. In order to evaluate the designed blade, the structural and aerodynamic performance tests were carried out, and the test results were compared with the analysis results.

Prediction of lymph node metastasis in patients with apparent early endometrial cancer

( Joo-hyuk Son ),( Taewook Kong ),( Suhyun Kim ),( Jiheum Paek ),( Sukjoon Chang ),( Eunju Lee ),( Heesug Ryu ) 대한산부인과학회 2015 Obstetrics & Gynecology Science Vol.58 No.5

The purpose of this study is to investigate the incidence of lymph node metastasis in early endometrial cancer patients and to evaluate preoperative clinicopathological factors predicting lymph node metastasis.We identified 142 patients with endometrial cancer between January 2000 and February 2013. All patients demonstrated endometrioid adenocarcinoma with grade 1 or 2 on preoperative endometrial biopsy. Preoperative magnetic resonance imaging showed that tumors were confined to the uterine corpus with superficial myometrial invasion (less than 50%), and there were no lymph nodes enlargements. All patients had complete staging procedures and were surgically staged according to the 2009 FIGO (International Federation of Gynecology and Obstetrics) staging system. Clinical and pathological data were obtained from medical records and statistically analyzed.Of the 142 patients, 127 patients (89.4%) presented with stage 1A, 8 (5.6%) with stage IB, 3 (2.1%) with stage II, and 4 (2.8%) with stage III disease. Three patients (2.1%) had lymph node metastasis­2 IIIC1 and 1 IIIC2 disease. Age, preoperative tumor grade, and myometrial invasion less than 50% on preoperative MRI were not associated with lymph node metastasis. A high preoperative serum CA-125 level (>35 IU/mL) was a statistically significant factor for predicting lymph node metastasis on univariate and multivariate analyses. Lymph node metastasis was only found in patients with preoperative grade 2 tumors or a high serum CA-125 level.Preoperative tumor grade and serum CA-125 level can predict lymph node metastasis in apparent early endometrial cancer patients.

소형 풍력발전기 블레이드의 구조설계 및 충격손상 안전성 연구

공창덕,최수현,박현범,Kong, Changduk,Choi, Suhyun,Park, Hyunbum 항공우주시스템공학회 2008 항공우주시스템공학회지 Vol.2 No.2

Recently the wind energy has been alternatively used as a renewable energy resource instead of the mostly used fossil fuel due to its lack and environmental issues. This work is to propose a structural design and analysis procedure for development of the low noise 100W class small wind turbine system which will be applicable to relatively low speed region like Korea and for the domestic use. Structural analysis including load cases, stress, deformation, buckling, vibration and fatigue life was performed using the Finite Element Method, the load spectrum analysis and the Miner rule. In order to evaluate the designed structure, the structural test was carried out and its test results were compared with the estimated results. In addition, the blade should be safe from the impact damage due to FOD(Foreign Object Damage) including the bird strike. In order to analize the bird strike penomena on the blade, MSC. Dytran was used, and the applied method Arbitrary Lagrangian-Eulerian was evalud by comparison with the previous study results.

여러 가지 특수미의 항산화 활성 및 항산화 성분

서선정(Sun Jung Seo),최용민(Youngmin Choi),이선미(Seon-Mi Lee),공수현(Suhyun Kong),이준수(Junsoo Lee) 한국식품영양과학회 2008 한국식품영양과학회지 Vol.37 No.2

본 연구에서는 쌀 섭취의 중요성에 착안하여 건강 기능성 쌀로 개발된 특수미의 항산화 활성과 항산화 성분을 분석하고 항산화력과 항산화 성분 간의 상관성을 비교·분석하고자 하였다. 특수미 시료 중 흑미의 polyphenol, vitamin E, phytic acid, anthocyanin 함량은 각각 444.38, 0.79, 130.92, 146.90 ㎎/100 g으로 vitamin E를 제외하고 다른 특수미에 비해 가장 높은 항산화 성분 함량을 나타내었다. 또한 흑미 methanol 추출물의 총 항산화력(697.27 AEAC), 환원력(2.32 A700), 지질과산화 억제력(84.18%), 금속이온 제거능(38.47%), xatnhine oxidase 억제활성(66.52%)은 금속이온제거능을 제외하고 다른 시료에 비해 높은 활성을 나타내었다. 특수미의 항산화 성분과 항산화 활성간의 상관분석 결과 polyphenol 함량이 높을수록 총 항산화력(R2=9921), 환원력(R²=9856) xanthine oxidase 억제 활성(R2=8032)이 증가하는 것으로 나타났다. 흑미와 더불어 적색미도 상당한 항산화 성분을 함유하고 있었으며 그에 따른 우수한 항산화 활성을 나타내는 것을 알 수 있었다. 본 연구 결과는 쌀의 항산화성분과 항산화 활성연구에 있어 기초 자료로서 활용될 것으로 예상되며, 건강증진 식품으로서 쌀을 인식시켜 나아가 쌀의 소비 촉진에 영향을 끼칠 것으로 기대한다. The objectives of this study were to determine antioxidant activity of the methanolic extracts from some specialty rices and to investigate relationships between antioxidant activities and antioxidant contents in the extracts. ABTS (2,2-azino-bis-(3-ethylbenzothiazoline-6-sulphonic acid)) radical cation scavenging activity, inhibitory effect on lipid peroxidation, chelating activity, reducing power and inhibitory effect on xanthine oxidase have been used to investigate the relative antioxidant activity of the extracts from specialty rices. The concentrations of total polyphenolics, phytic acid, and anthocyanin in the extracts were measured by spectrophotometric methods and vitamin E analysis was carried out by HPLC. The methanolic extracts prepared from black and red rices showed higher antioxidant activities and contained higher antioxidant compounds compared with other rices, apparently due to their intense red-purple color. The correlation coefficient between total polyphenolic content of methanolic extracts and ABTS radical cation scavenging activity, reducing power, and inhibitory effect of xanthine oxidase were 0.9921, 0.9856, and 0.8032, respectively.