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청갓과 적갓에 함유된 Glucosinolates의 항암 활성 및 정량 분석
김활 ( Hwal Kim ),김준열 ( Jun Yeol Kim ),김효진 ( Hyo Jin Kim ),김도경 ( Do Kyung Kim ),조혜진 ( Hye Jin Jo ),한병수 ( Byoung Su Han ),김헌웅 ( Heon Woong Kim ),김정봉 ( Jung Bong Kim ) 한국식품영양학회 2011 韓國食品營養學會誌 Vol.24 No.3
The objective of this study was to compare the anticancer activity of glucosinolates against four different cancer cells; SNU-251, SNU-354, SNU-C4, MCF-7 and to determine the amounts of glucosinolates in mustard leaves. Green and red mustard leaves were cultivated on the field of Rural Development Administration from May to July, 2010. After the leaves were harvest and lypophilized, the fine powder was extracted with boiling 70% methanol(v/v) for the measurement of anticancer activity and then applied to the cancer cells obtained from Korean Cell Line Bank(KCLB). The anticancer activity of red leaf mustard was higher than that of green mustard leaf, particularly in SNU-251 for 24 hr and in SNU-C4 for 48 hr. In both green and red mustard leaf, sinigrin was the most abundant glucosinolte and was determined as 4.71 and 3.06 ㎎/g dry wt., respectively, but glucoiberin only presented 0.14 ㎎/g dry wt. with minor amounts.
홀로그래픽 정보 저장 장치의 데이터 페이지 주파수 특성 및 광학 시스템 표현
김활 ( Hwal Kim ),전성빈 ( Sung Bin Jeon ),김도형 ( Do Hyung Kim ),박노철 ( No Cheol Park ),박영필 ( Young Pil Park ) 정보저장시스템학회 2015 정보저장시스템학회논문집 Vol.11 No.1
The selective frequency analysis method is suggested in the holographic data storage system with the nyquist aperture to reduce the size of hologram. The image filter was designed with many different methods to improve the bit error rate caused by the nyquist aperture. In previous the methods of image restoration for HDS, an iteration time and a highly precise point spread function were necessary. In this paper, we describe the optical system with analytic method. Thereby, we expect our result help the researchers to design the filter.
진폭 마스크와 2D 카오스 함수를 이용한 다중 이미지 광학 암호화
김활 ( Hwal Kim ),전성빈 ( Sung Bin Jeon ),김도형 ( Do Hyung Kim ),박노철 ( No Cheol Park ),박영필 ( Young Pil Park ) 정보저장시스템학회 2014 정보저장시스템학회논문집 Vol.10 No.2
Object image using DRPE(Double Random Phase Encryption) in 4f system is encrypted by space division method using amplitude mask. However, this method has the weakness for the case of having partial data of amplitude mask which can access the original image. To improve the security, we propose the method using the 2 dimension logistic chaos function which shuffles the encrypted data. It is shown in simulation results that the proposed method is highly sensitive to chaos function parameters. To properly decrypt from shuffled encryption data, below 1e-5 % errors of each parameter should be required. Thus compared with conventional method the proposed shows the higher security level.