산화적 스트레스에 대한 여주(Momordica charantia Linn.)잎의 항산화 활성 및 간세포 보호능

전아영,천원영,윤지민,김대중,김영화,Jeon, Ahyeong,Cheon, Wonyoung,Yoon, Jimin,Kim, Dae-Jung,Kim, Younghwa 한국식생활문화학회 2020 韓國食生活文化學會誌 Vol.35 No.6

This study examined the bioactive compound content and the antioxidant activities of bitter melon (Momordica charantia Linn.) leaves. The content of vitamin C, beta-carotene, and total carotenoids was 69.77, 45.68, and 65.08 mg/100 g, respectively. To investigate the antioxidant capacity, bitter melon leaves were extracted using various concentrations of ethanol (60, 80, or 100%). Highest content of total polyphenols (18.07 mg gallic acid equivalent/g) and flavonoids (4.53 mg cathechin equivalent/g) was found in the 100% ethanolic extract of the leaves (E100). Also, the E100 extract showed the highest levels of 2,2'azino-bis-3-ethylbenzothiazoline-6-sulfonic acid (ABTS) and α-α-diphenyl-β-picrylhydrazyl (DPPH) free radical scavenging activities. Reducing power was also the highest (39.21 mg Trolox equivalent/g) in E100 extract. The E100 extract effectively inhibited lipid peroxidation by 91.45% compared to the control group. Also, the E100 extract showed a cytoprotective effect against oxidative stress in HepG2 cells and decreased the generation of intracellular reactive oxygen species. These results suggest that bitter melon leaves could be regarded as a potential source of natural antioxidants.

박리화와 재적층법을 통한 K₂La₂Ti₃O₁₀부터 유전성 Bi_4-xLa_xTi₃O₁₂(x~2)의 합성

전아영,고지은,김종영,Jeon, A Young,Ko, Jieun,Kim, Jong-Young 한국결정성장학회 2013 韓國結晶成長學會誌 Vol.23 No.1

본 연구팀에서는 층상형 페로브스카이트 구조를 갖는 Ruddlesden-Popper 구조의 $K_2La_2Ti_3O_{10}$의 박리화를 통해 Aurivillius 구조의 $Bi_{4-x}La_xTi_3O_{12}$(x~2) 페로브스카이트 산화물을 성공적으로 합성하였다. 박리화된 란타늄 티타네이트 나노시트는 BiOCl 나노결정구조와 반응시켜 $Bi_{4-x}La_xTi_3O_{12}$(x~2) 결정을 얻어내었다. 박리화된 나노시트 현탁액은 $K_2La_2Ti_3O_{10}$으로부터 수소화된 $H_2La_2Ti_3O_{10}$의 층간에 에틸아민을 삽입시킴으로써 얻어내었다. 투과전자현미경(TEM) 분석을 통해, 란타늄 티타네이트가 에틸아민에 의해 박리화된 것을 확인할 수 있었다. X-선 회절분석(XRD)을 통해, 박리화된 란타늄 티타네이트와 BiOCl의 재적층과정을 거쳐 $700^{\circ}C$ 이상의 열처리 조건에서 $Bi_{4-x}La_xTi_3O_{12}$(x~2)로 형성된 것을 확인할 수 있었다. We have successfully synthesized $Bi_{4-x}La_xTi_3O_{12}$ (x~2) having Aurivillius-type layered perovskite structure from exfoliated layered perovskite oxide of $K_2La_2Ti_3O_{10}$ with Ruddlesden-Popper structure. The reaction between the exfoliated lanthanum titanate nanosheets and BiOCl nanocrystal resulted in the formation of polycrystalline $Bi_{4-x}La_xTi_3O_{12}$ (x~2) after heating above $700^{\circ}C$. Colloidal suspension of the nanosheets could be obtained by intercalating ethylamine (EA) into the protonated lanthanum titanate, $H_2La_2Ti_3O_{10}$, derived from $K_2La_2Ti_3O_{10}$. Transmission electron microscopic (TEM) analysis show that the exfoliated lanthanium titanate nanosheets have a thickness of a few nano meters. According to X-ray diffraction (XRD) analysis, the exfoliated lanthanium titanate was found to be transformed into $Bi_{4-x}La_xTi_3O_{12}$ (x~2) after restacking with BiOCl and subsequent thermal treatment at > $700^{\circ}C$.

뫼스바우어 분광법과 색도 분석에 의한 고대 고려청자의 발색메카니즘 연구

전아영,노형구,김응수,조우석,김경자,김종영,김진모,김철성,강경인,Jeon, A-Young,No, Hyung-Goo,Kim, Ung-Soo,Cho, Woo-Seok,Kim, Kyung-Ja,Kim, Jong-Young,Kim, Chin-Mo,Kim, Chul-Sung,Kang, Gyung-In 한국세라믹학회 2012 한국세라믹학회지 Vol.49 No.1

In ancient Goryeo celadon, the effect of the chemical composition and ionic state of Fe on the color was evaluated by Mossbauer spectroscopy and Design of Experiment (DOE) analysis. The ancient celadon pieces excavated from the kiln sites in GangJin and Buan areas were analyzed by Mssbauer spectroscopy, chromaticity, and DOE analysis. The color of celadon was found to be mainly determined by that of glaze since variations of $L^*$, $a^*$, and $b^*$ values for the body were much smaller than those for the glaze. As $Fe^{2+}$/$Fe^{3+}$ in glaze increases, $L^*$ value increases, whereas $a^*$/$b^*$ value decreases, which is well consistent with the result on the synthetic glaze. As the amount of titanium increases in the glaze, the $a^*$ and $b^*$ values decrease; on the other hand, the $L^*$ value increases, which is well consistent with the result on the synthetic glaze.

게임전략을 활용한 문학적 접근활동이 유아의 음운인식능력 및 쓰기능력에 미치는 영향

전아영(Ah Young Jeon),최미숙(Mi Sook Choi) 한국아동학회 2012 아동학회지 Vol.33 No.5

The purpose of this study was to examine the effects of the literary approach using a game strategy on young children`s phonological awareness and writing abilities. The subjects were selected from two classes of ``H`` and ``M`` Kindergarten in G city. The research tools used were the Phonological Awareness Ability Test, which was corrected by Jo, Kim, and Jeong(2006) and used to measure young children`s phonological awareness abilities, and Lindberg(1987)`s Kindergarten Writing Assessment which was adapted and used by Noh(1994) in order to assess writing abilities. The literary approach activity using a game strategy used in this study resulted in an improvement in young children`s phonological awareness abilities and writing abilities. These results suggest that these activities are valuable tools and can be applied successfully in the childhood education field as teaching aids.

3축 가속도 센서를 이용한 낙상 검출 시스템 구현

전아영(Jeon, Ah-Young),유주연(Yoo, Ju-Yeon),박근철(Park, Geun-Chul),전계록(Jeon, Gye-Rok) 한국산학기술학회 2010 한국산학기술학회논문지 Vol.11 No.5

본 연구에서는 3축 가속도 신호를 이용하여 낙상과 낙상 방향을 검출하는 시스템을 구현하였다. 가속도 신 호는 3축 가속도 센서로부터 획득하였으며, 획득된 신호를 USB 인터페이스를 통하여 PC에 전달하였다. PC에 전송 된 신호를 제안한 알고리즘을 사용하여 낙상을 검출하였으며, 퍼지 분류기를 사용하여 낙상의 방향을 분류하였다. 실 험을 위하여 실험대상군 6명 선정하였으며, 가슴에 가속도계를 부착한 후 실험을 수행하였다. 실험대상자는 5초 동 안 정상 보행을 한 후 4 가지 방향(전․후․좌․우)으로 낙상이 발생하도록 하였으며, 낙상에 소요되는 시간은 최소 2초 로 설정하였다. 본 연구에서 제안된 알고리즘을 이용하여 낙상을 검출하였으며 낙상 발생 후 1초부터 데이터를 분석 하고 퍼지 분류기를 이용하여 낙상방향을 분류하였다. 낙상 검출율은 평균 94.79%이었다. 낙상 방향에 따른 분류율 은 front_fall은 95.83%, back_fall은 100%, left_fall 은 87.5%, right_fall은 95.83%이었다. In this study, the falls detection and direction classification system was implemented using 3-axial acceleration signal. The acceleration signals were acquired from the 3-axial accelerometer(MMA7260Q, Freescale, USA), and then transmitted to the computer through USB interface. The implemented system can detect falls using the newly proposed algorithm, and also classify the direction of falls using fuzzy classifier. The 6 subjects was selected for experiment and the accelerometer was attached on each subject's chest. Each subject walked in normal pace for 5 seconds, and then the fall down according to the four direction(front_fall, back_fall, left_fall and right_fall) during at least 2 second. The falls was easily detect using the newly proposed algorithm in this study. The acquired signals were analyzed after 1 second from generating falls. The fuzzy classifier was used to classify the direction of falls. The mean value of the falls detection rate was 94.79 %. The classifier rate according to falls direction were 95.83% in case of front falls, 100% incase of back falls, 87.5% in case of left falls, and 95.83% in case of right falls.

식품에서 비타민 B₂ 분석을 위한 추출법 연구

전아영(Ahyeong Jeon),김다경(Dagyeong Kim),최용민(Youngmin Choi),김영화(Younghwa Kim) 한국식품영양과학회 2022 한국식품영양과학회지 Vol.51 No.1

문제중심학습(PBL)에 기초한 유아 인권교육 프로그램 개발 및 효과

전아영(Jeon, A-Young),최미숙(Choi, Mi-Sook) 한국열린유아교육학회 2018 열린유아교육연구 Vol.23 No.4

본 연구는 문제중심학습에 기초한 유아 인권교육 프로그램을 개발하고 그 효과를 검증하는 데 목적이 있다. 이를 위해 문제중심학습과 인권교육에 대한 문헌고찰 및 선행연구 분석을 토대로 문제중심학습에 기초한 유아 인권교육 프로그램의 목적 및 목표를 설정하고 교육 내용을 구성하였다. 교수·학습 방법으로 교수·학습원리, 교수·학습 단계를 구성하였으며 프로그램의 평가 방법을 선정한 후, 현장 적합성에 대한 검토 및 수정·보완을 거쳐 최종 프로그램을 개발하였다. 구성된 프로그램은 만 5세 유아에게 8주간 총 24차시를 적용하였으며, 유아 인권관련태도 검사, 인권행동 검사를 통하여 프로그램의 효과를 검증하였다. 그 결과 본 연구에서 개발한 문제중심학습에 기초한 유아 인권교육 프로그램이 유아의 인권관련 태도, 인권행동 향상에 효과적임을 알 수 있었다. 이에 본 연구에서 개발한 문제중심학습에 기초한 유아 인권교육 프로그램은 유아교육현장에서 유아의 인권 옹호적 태도 및 실천을 돕는 교육활동으로 활용될 수 있는 이론적 근거와 시사점을 제공한다. The present study aims to develop a human rights education program for young children based on problem-based learning and to verify its effectiveness. For this, the study established the purposes and objectives of the human rights education program for young children and the educational contents with the ground on problem-based learning based on the analysis of literature and precedent research. Teaching-learning principles and teaching-learning stages were constructed by teaching-learning methods, and after selecting program evaluation methods, the final program was developed through review, correction, and supplementation for the field suitability. The comprised program was applied to children at the age of 5 for 8 weeks for the total of 24 times, and the effectiveness of the program was verified through the evaluation of children"s human rights-related attitude and behavior. As a result, it was found that the human rights education program for young children based on problem-based learning developed in this study was effective in improving children"s human rights-related attitude and behavior. Thus, the human rights education program for young children based on problem-based learning developed in this study provide the theoretical grounds and implications that can be used as educational activities to support children"s human rights advocating attitude and practice in the field of early childhood education.

골프 운동이 중년여성들의 외적스트레스요인과 대사증후군인자에 미치는 영향

전아영(Jeon, A-Young),서영환(Seo, Young-Hwan) 한국체육과학회 2020 한국체육과학회지 Vol.29 No.2

Due to the lack of physical activity of middle-aged women in recent years, stress at home and at work has led to diseases such as obesity and metabolic syndrome. In order to prevent these diseases in advance, golf exercise was carried out to middle-aged women. The change of α-amylase after golf exercise was decreased after the golf exercise, and the interaction effect was shown only between the measurement time*groups. In the factors related to metabolic syndrome after golf exercise, waist circumference was decreased after the golf exercise, and there was an interaction effect only between the measurement time and the group. HDL-C showed increased results before and after golf exercise, and there was an interaction effect between measurement time and measurement time*group. TG decreased after the golf exercise, and there was an interaction effect between the measurement time and the measurement time*group. Fasting blood glucose was decreased after the golf exercise, and there was an interaction effect between the measurement time and the measurement time*group. Systolic blood pressure was decreased after the golf exercise, and there was only an interaction effect between the measurement time groups. Diastolic blood pressure was found to have an interactive effect only at the time of measurement before and after golfing. Taken together, golf exercise has been shown to be effective in reducing stress-induced metabolic syndrome in middle-aged women.

국내 시판 중인 조미료 및 소스류에 함유된 수용성 비타민 함량 분석

전아영(Ahyeong Jeon),김영화(Younghwa Kim) 한국식품영양과학회 2020 한국식품영양과학회지 Vol.49 No.4

본 연구에서는 국내 시판 중인 조미료 및 소스류에 함유된 수용성 비타민 B₁, B₂, B12 및 니아신의 함량을 평가하였다. 각 수용성 비타민의 분석에 대한 분석법 검증은 검출한계, 정량한계, 직선성, 정확성 및 정밀성에 대해 수행되었고 모두 우수한 지표를 나타내었다. 또한 품질관리도표인 QC Chart를 이용하여 분석기간 동안 적절한 품질관리 하에 진행되었음을 확인했고, 본 분석에 대한 신뢰성을 확보할 수 있었다. 국내 시판 중인 조미료 11종에 함유된 비타민 B₁, B₂, B12 및 니아신의 함량을 분석한 결과, 비타민 B₁은 요리초에서 0.439 mg/100 g, 비타민 B₂는 멸치 및 다시마 액상조미료에서 0.317 mg/100 g으로 유의적으로 가장 높은 값을 나타내었다. 니아신은 멸치 및 다시마 액상조미료에서 12.213 mg/100 g, 비타민 B12는 해물육수 분말 조미료에서 1.060 μg/100 g의 높은 값을 나타내었다. 한편, 국내에서 시판 중인 19종의 소스류에 함유된 비타민 B₁의 함량은 망고바나나 카레에서 4.832 mg/100 g, 비타민 B₂는 매운맛 볶음양념소스에서 0.457 mg/100 g으로 가장 높은 함량을 나타내었다. 니아신은 짬뽕순두부찌개소스에서 13.115 mg/100g의 유의적으로 가장 높은 값을 나타냈으며, 비타민 B12는 비빔 소스(bibim sauce)에서 0.350 μg/100 g으로 가장 높은 함량을 나타내었다. 본 연구에서는 국내 시판 중인 조미료 및 소스류의 수용성 비타민의 함량을 분석했으며, 그 결과 조미료 및 소스류의 원재료에 따라 수용성 비타민 함량에 차이가 나타나는 것을 확인할 수 있었다. 따라서 조미료 및 소스류는 수용성 비타민 영양소 공급을 위한 식품 재료로써 활용가치가 점차 증가할 것으로 기대된다. This study aimed to examine the content of water-soluble vitamins B₁ (thiamin), B₂ (riboflavin), B₃ (niacin), and B12 (cyanocobalamin) of commercially available seasonings and sauces. Eleven seasonings and nineteen sauces were analyzed using high-performance liquid chromatography (HPLC) with ultraviolet and fluorescence detectors. The applied analytical methods were verified. The infant formula was used as quality control sample and analyzed with each run for all methods and all samples. All analytical methods for water-soluble vitamins showed good accuracy (91.8∼110.4% recoveries) and precision (<5% relative standard deviations), which met the requirements of official method validation guidelines. In the analyzed seasonings, the highest content of vitamin B₁ was 0.439 mg/100 g in cooking vinegar, and those of vitamins B₂ and B₃ were 0.317 mg/100 g and 12.213 mg/100 g, respectively, in anchovy and kelp-soup base. The highest content of vitamin B12 was 1.060 μg/100 g in seafood-soup stock powder. In the analyzed sauces, the highest content of vitamin B₁, 4.832 mg/100 g, was in curry sauce with mango and banana. The highest content of vitamin B₂ was 0.457 mg/100 g in spicy stir fry sauce, and jjamppong sundubu-jjigae sauce had the highest content of vitamin B₃, 13.115 mg/100 g. The content of vitamin B12 was the highest in bibim sauce, 0.350 μg/100 g. These results provide reliable data on the water-soluble vitamins B₁, B₂, B₃, and B12 content of commercially available seasonings and sauces in Korea.

복합운동이 아마추어 골퍼들의 체력과 드라이버 샷 비거리에 미치는 효과

전아영(A-Young Jeon),서영환(Young-Hwan Seo) 한국발육발달학회 2017 한국발육발달학회지 Vol.25 No.1

The purpose of this study was to investigate the effects of combined exercise on driver shot distance and physical fitness in amateur golfers (n = 15). Total 8 weeks of combined exercise (treadmill exercise + core exercise) was performed, and driver shots and physical fitness were measured before and after exercise. The statistical analysis was based on the results obtained by applying the corresponding sample t-test to the pre and post-test differences in the group. First, the distance of the driver shots of the exercise group with combined movement was measured before and after the experiment, and the distance of the amateur golfers was improved and statistically significant difference was shown (p<.001). Second, there was a statistically significant difference in strength, muscle endurance, cardiovascular endurance, flexibility, and empowerment (p<.05, p<.01, p<.001). This result is an effective exercise for amateur golfers because of the improvement of physical fitness and the increase of distance. Therefore, it is recommended that amateur golfers improve their physical fitness and distance by multiplying their movements. In addition, if future studies are conducted by combining motion analysis using video equipment and studies on active oxygen for condition control, It is thought that amateur golfers will be able to present an effective exercise program.