추황배(Pyrus pyrifolia Nakai cv. Chuhwangbae) 과피로부터 1종의 Sterol과 3종의 배당체 화합물의 단리·동정

이유건(Yu Geon Lee1),조정용(Jeong-Yong Cho),이현주(Hyun Joo Lee),이용현(Yong Hyun Lee),이상현(Sang-Hyun Lee),한태호(Tae-Ho Han),김월수(Wol-Soo Kim),박근형(Keun-Hyung Park),문제학(Jae-Hak Moon) 한국식품과학회 2013 한국식품과학회지 Vol.45 No.5

본 연구에서는 배의 유용성 증명을 위한 일환으로 배의 화학성분을 분자수준에서 밝히고자 하였다. 이에 배 과피 MeOH 추출물을 용매분획하여 얻은 EtOAc-산성 분획과 EtOAc-중성분획을 대상으로 Sephadex LH-20, silica gel, 그리고 ODS colmn chromatography와 HPLC를 이용하여 정제 및 단리하였다. 그 결과, EtOAc-산성 분획과 EtOAc-중성 분획으로부터 각각 2종씩의 화합물을 단리하였다. 단리된 화합물 1-4는 1H- 및 13C-NMR 분석을 통하여 각각 (S)-(+)-2-cis-abscisic acid O-β-D-glucopyranosyl ester (화합물 1), 1-[4-O-β-D-glucopyranosyl]phenyl ethanone(piceoside, 화합물 2), β-sitosterol (화합물 3), 그리고 β-sitosteryl 3-O-β-D-glucopyranoside (화합물 4)로 동정되었다. 단리된 3종의 배당체 화합물(화합물 1, 2, 4)들은 본 연구에 의해 배로부터 처음 동정되었으며, 화합물 3은 추황배로부터 처음 동정되었다. 본 연구결과가 배 함유 성분연구는 물론 배의 기능성 해명 연구에도 추후 중요한 기초자료로 활용되길 기대한다. We isolated and identified antioxidants from acidic and neutral ethyl acetate fractions of the peel of pear (Pyrus pyrifolia N. cv. Chuhwangbae). We isolated 4 compounds from the methanol extract, by using 3 different types of column chromatography (Sephadex LH-20, silica gel, and octadecylsilane) and preparative HPLC. We identified the isolated compounds as (S)-(+)-2-cis-abscisic acid O-β-D-glucopyranosyl ester (compound 1), 1-[4-O-β-D-glucopyranosyl]phenyl ethanone (picroside, compound 2), β-sitosterol (compound 3), and β-sitosteryl 3-O-β-D-glucopyranoside (compound 4) by nuclear magnetic resonance analysis. We are the first to report the identification of compounds 1, 2, and 4 from pear.

단상 유도형 동기 전동기(LSPM)의 특성해석에 관한 연구

정대성,김승주,이진헌,최재학,이주,Jung, Dae-Sung,Kim, Seung-Ju,Lee, Jin-Hun,Choi, Jae-Hak,Lee, Ju 한국조명전기설비학회 2007 조명·전기설비학회논문지 Vol.21 No.3

가전분야에서의 전동기 효율향상을 통한 에너지 소비절감 효과는 상당히 크지만 이를 위한 전동기의 설계/해석 기술 확보가 아직은 미흡한 상태이다. 이에 따라 유도형 동기전동기가 제안되었지만, 유도형 동기 전동기는 유도전동기와 통기전동기의 특성을 동시에 가지고 있어, 해석 및 설계가 쉽지 않다. 따라서 본 논문에서는 기존의 냉장고 압축기용 전동기인 단상유도전동기를 대처할 수 있는 단상 유도형 동기전동기를 이용해 파라미터에 따라 특성이 어떻게 바뀌는가에 대해 서술하였다. 그에 따라 단상유도전동기의 정상상태 특성을 해석하고 제안모델의 성능을 기존모델과 비교하고 실험하여 해석결과의 신뢰성을 검증한다. 또한 본 논문에서는 제안모델의 기존 고정자 형상이나 권선 스팩을 유지하고 회전자의 형상이나 구조만을 변경시켜 성능향상을 도모하였다. 해석방법으로는 전자장 수치 해석적인 방법으로 널리 이용되고 있는 유한요소법(Finite Element Method : FEM)을 이용하였다. Electric motor efficient improvement from home appliance field is important to the effect reducing the energy consumption. But the electric motor design/analysis technology is still insufficient. Specially the electric motor design/analysis technology of satisfying characteristic of both the induction motor and the synchronous motor such as Line start permanent motor. Therefore the electric motor design/analysis technology is urgently demanded reliability. This paper proposes the sing1e-phase line-start permanent magnet motor to develop the motor it with be able to alternate the sing-phase induction motor it is a refrigerator compressor motor. The sing-phase induction motor is analyzed in the steady state. And we have a certification test to compare our single-phase line-start permanent magnet motor with the sing-phase induction motor. In order to improve the performance, the stator of the single-phase line-start permanent magnet motor is same as the stator of the sing-phase induction motor and changes the rotor form and has the permanent magnet. It used the Finite Element Method(FEM) which is widely used with electronic-magnetic field numerical analysis method.

포도에 대한 Captafol 수화제의 안전사용기준 설정

李載球,慶箕性,金學南 충북대학교 농업과학기술연구소 1993 農業科學硏究 Vol.11 No.1

In order to establish the criteria for the safe use of the fungicide captafol on grapes, 12 plots with different spray frequency and different spray time were placed and sprayed on stems and leaves with the captafol wettable powder up to 3, 7, 15, 30, 45, 60 days before harvest. The results of the analysis of captafol residues on the sample grapes were as follows : 1- Recovery values obtained from fortified control samples were 85.3 and 90.0%, respectively, at the 0.1 and 1.0 ppm levels, the detection limits being 0.06 ng(0.015 ppm). 2. Captafol residues were detected in all samples, ranging from 0.25 to 5.79 ppm. 3. Captafol residues had a tendency to become the more, the more spray frequency and the closer spray time to harvest. 4. The captafol residues on grapes were within the maximum residue limits in the samples sprayed 4 times involving those sprayed up to 3 days before harvest, whereas the residues in the samples sprayed 5 times were beyond the limits. 5. It was recommended that the captafol WP should be sprayed on grapes 4 times up to 7 days before harvest.

줄넘기 生活化를 爲한 理論的인 硏究

李亨元,金相鶴 順天大學校 1983 論文集 Vol.2 No.1

For the children as one of the most effective exercises regardless of season, rope-skipping which can make them use the two-thirds of bodily muscles will be a production of wisdom in the children's sports. And furthermore it is no doubt being used regularly to the various kind of players who need strong body as well as general citizens who try to look for a good health in daily life. Since it as a all-weather exercise has special characteristics that its exercise is so econmic and easy irrespective of time and place to learn that all people easily train. Sometimes this rope-skipping is misunderstood as a forced or formal exercise, and even it they recognize its necessity but they are less interested in it without the voluntary and positive will. Most of them can be largely found to be complicated in their private life or to be feeble-minded child in the exercise apititude. As the first aim of physical exercises in the suggestion of teaching guidance is to strengthen the body strength, the fist step of activity to carry out the aim is to teach the practical direction of attitude and behavior. So the active political measure from the government from the purporse of accomplishing the aimis badly needed nowin various class of schools. Schools should not cling to the only rope-skipping itself but use it with diverse teaching methods with the accordance with interesting and effective exercise motives. The non-stop activities of this exercise according to voluntary and creative training methods will surely result in a good outcome which this thesis intends.

정사각형 장애물 주위 유동에서 역압력구배의 영향에 관한 실험적 연구

이학성,박계향,유상신 한국 항공대학교 항공산업기술연구소 1996 航空宇宙産業技術硏究所 硏究誌 Vol.6 No.-

An experimental study on the reattachment length behind the square obstacle under the adverse pressure gradient is conducted. An obstacle is fixed on the flat plate and the plate is installed in the test section of the wind tunnel. The upper wall of the wind tunnel is designed to be adjusted to impose the adverse pressure gradient on the flat plate. Tufts, ink-dot-liquid-film technique and a single hot wire are used to visualize and to determine the reattachment length of the flow field. Experimental results for the reattachment length of a model installed in the wind tunnel are strongly affected by the circumstances of the plate, installation, that is, whether sides of a model to the wind tunnel wall is open or completely closed. In order to ensure the two-dimensional flow on the plate sides of a model to the wind tunnel should be completely closed. The reattachment length of the square obstacle increase as the adverse pressure gradient increases.

한국북방경역의 역사지리학적 연구(Ⅰ)

이성학 慶北大學校 1969 論文集 Vol.13 No.-

1) A study of historical change on the north frontiers of Korea. 2) The north boundary was the region of Yo-Dong (遼東) or the river of Pea (浿水) during Ancient-Korea dynasty. It was changed by the vicissitudes or rise and fall of the northern nations. 3) The Emperor of Han (漢) governed the peninsula of Han (韓). Its southern frontier was chiefly the northern region of the Han River (漢江) and the mountaion of Chul-Yung (鐵嶺) 4) Kokuryo(高句麗) occupied the greatest northern territory at the time of King, Yung Rak(永樂): the northern boundary was the eastern region of the river of Yo (遼河) and the region of the Song-Wha River was the large territory which were from Jang-Chun (長春) Nong-An(農安) Ha-L-Bin(哈爾濱) to the East-Sea. (東海) 5) Shilla(新羅) unified three states, yet the did not occupied all of Kokuryo territory but a part of it. The north-western frontier of Shilla was region on the river of Tea-Dong (大同江) Chung-Wha(中和) Sang-Won(祥原) and Kok-San(谷山). The north-eastern frontier of Shilla was the northern region of Chul-Yung(鐵嶺) An-byun(安邊) and northern Kang-Won(江原) of today. Shilla should have occupied the larger northern region, but it was not so large. Note : This is the northern frontier from Ancient-Korea to Shilla Dynasty, but those of Koryo(高麗) and Rhee Dynasty(李朝) will be mentioned at the next number.

韓國歷史地理硏究 : 陸上 交通(主로 驛站制를 中心으로)에 關한 考察 (The system of Yeuk-Cham in the over-land communication)

李聖學 경북대학교 1968 論文集 Vol.12 No.-

1. The system of Yeuk-Cham (驛站) is a conveying method of an official document in the system of bureaucratic government and centralization. It is essential function but has transformation. 2. The Yeuk-Cham divides up three types according to the significance. 3. The distribution of Yeuk-Cham means human development and the circumstance, and a number of the large-Yeuks is posted near the Capital and the province of Pyong-An, but the many little-Yeuks is at the southern Korea. 4. The management of Yeuk is different by rank. Its- treatment had different grade by official status. 5. The system of Phal-Cham(撥站) has other function, and it is Ki-Phal(騎撥) (carried by house) from the Capital to I-Chu. For Korea has a deep relation with China, but from Dong-Rae to Ham-Kyung it is Bo-Phal(步撥). 6. The settlements originated by Yeuk-Cham, disregarded by the society at Yi-Dynasty. 7. Yeuk-Cham was abolished by the development of railway and road, but their relation is importance.

난소절제후 Estrogen을 투여한 흰쥐 대동맥에서 Protein Kinase C-α와 Fas 발현의 변화

이왕수,이상엽,안지현,송영빈,김학진,이광재,유재격,김상욱,김태호,김치정,류왕성 중앙대학교 의과대학 의과학연구소 2001 中央醫大誌 Vol.26 No.3

Estrogen is believed to decrease coronary artery disease. Protein kinase C-α(PKCα)appear to be important in signal conduction pathways. Estrogen treatment increases catalytic activity of PKCα,and activation of PKCαcan modulate estrogen receptor levels and responsiveness. And it was reported that activation of PKC can protect cells from apoptosis induced by Fas ligation. But the beneficial effect of estrogen on PKCαwas not clearly demonstrated. The objective of this study was to evaluate the role of PKCαafter ovariectomy and estrogen therapy in rat aorta. The results were summarized as below: 1. The significant pathological changes were not observed in the rat aorta irrelevant to ovariectomy and estrogen therapy. 2. The expression of Fas was decreased in the aorta of estrogen-treated rats than that of ovariectomized rats without estrogen therapy. 3. Increased expression of PKCαwas more marked in the aprta of estrogen-treated rats than that of ovariectomized rat without estrogen therapy. In conclusion,PKCαmay be important in signal conduation pathway on the effect of estrogen. Activation of PKCαby estrogen reduced Fas expression, suggesting that PKCαactivation may play a role in protection against atherasclerosis. Further studies are needed to elucidate the role of PKCαafter estrogen therapy.

고강도 콘크리트(80MPa이상)를 이용한 콘크리트충전강관구조 적용을 위한 기초물성 연구

이장환,강용학,정근호,김진호,정상진,최문식 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.2

One of the most important reasons that CFT is used in many conditions is by using that we can achieve the effect, which reduce the section of the member. This research purpose to find the most ideal composition, which is achieved by the investigation in the concrete's property of matter like ability of Slump, Slump Flow, Air content, Bleeding, and Settlement when the high strength of concrete which is over 80MPa is used m the CFT column.

크론병에 대한 CoPPLX의 방어효과에 대한 연구

이호학,김유림,문창기,이재일,양병윤,김종수,이정민,정재혁,안석진,박상준,김윤권,김소연,김영중,조민구,최영자,장성조 圓光大學校 醫科學硏究所 2005 圓光醫科學 Vol.20 No.1