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.

韓國의 行政區域에 關한 歷史地理學的 硏究 : 통일 신라전 시대에 대하여

李聖學 경북대학교 교육대학원 1971 논문집 Vol.2 No.-

⑴ To find out historical process about the administrative districts of Korea, and suggest an idea which can reorganize the administrative district in this time. ⑵ Han-Sa Gun, located on the northern part of Korea, was the beginning of administrative district of Gun-Hoyn system and made the indigenous tribe stimulusly raise up., Number of Gun-Hoyn was changed according to the stage of period, and most distinguished those that were estimated at Nak-Rang 11, Jin-Bun 7, Im-Dun 7 and Hyon-Do 7 ⑶ Sam-Han, located on the souther part of Korea, were societies of Tribes-League. And most distinguished states of tribe were estimated at Jin-Han 12, Ma-Han 40 and Bjun-Han 25. ⑷ Administrative districts of Sam-Kuk period were 5-Bu system in Ko-Ku-Roe, 5-Bu or 5 Hang system in Baek-Jae, and noteworthy system of 6-Bu in Shilla ⑸ Gun-Hyon system in last period of Sam-Kuk was disappeared by the emergence of new-administrative district since unification of Shilla.

영幼兒養育에 關한 調査

李性寬,宋善祐,尹能基,李學洙,鄭鍾學,C.Kersting 慶北大學校 醫科大學 1973 慶北醫大誌 Vol.14 No.2

There is no doubt that good nutrition for infants relates not only to the health of the individual but also influences the health of the nation. In spite of nutrition's trememdous importance, there is no data available concerning infant nutrition and, moreover, there is no study about the knowledge, attitudes and practies of infant feeding and weaing. Taking into account the fact that most infants in Korea are breast fed, and have a long lactation period, there must be provision for adequate supplemental food at the proper time. The first step in launching a new health program should be the exact evaluation of the present status of infants' feeding diet. This study was designed to collect basic data on the status of infants' nutrition in order that these data might be sued as program organization indicators for the improvement of infant nutrition. The data were obtained through interviewing 726 mothers who registered their children at the Taegu MCH Center's well baby clinic.

톨루엔 폭로근로자의 요중 마뇨산 농도 및 건강장해

이학성,문광용,안갑환,서정호 한국환경과학회 2004 한국환경과학회지 Vol.13 No.10

The relationships between subjective symptoms of toluene exposed workers and concentration of their urinary excretion of hippuric acid were investigated. The exposed groups of 146 workers exposed to toluene and the control groups of 47 workers have never been exposed to toluene in Ulsan area were selected and studied. Hippuric acid was measured by HPLC, and counts of blood cells and liver function test were also performed. The mean value of urinary hippuric acid concentration of the control group was 0.322(±0.267) g/L, while that of the exposed group was 1.260(±0.395) g/L. As the concentration of hippuric acid had statistical proximity in 0.1% level, WBC, GOT, and GPT didn't have any proximity(P>0.05). The exposed group showed lower level of leucocyte counts 6522.40(1710.3) than the control group 6891.50(1483.7). The exposed group showed higher level of GOT(25.75), GPT(27.09) than GOT(23.75), GPT(25.21) of the control group. Dried skin was the highest complained symptom of toluene exposed workers, the second strained eye, the third poor auditory function, and the fourth was headache.

유한 반사판을 갖는 Quadrifilar Helix 안테나의 해석 및 설계

이창희,성원모,최학근 단국대학교 신소재기술연구소 1996 신소재 Vol.6 No.-

유한 반사판을 갖는 Quadrifilar Helix 안테나의 복사특성을 해석하기 위하여 반사판을 WireGrid로 모델링하고 모멘트법을 적용하였다. 안테나의 구조피라미터를 변화시키면서 빔폭, 이득, 입력임피던스, 복사패턴을 계산하여 설계에 이용할 수 있는 데이터를 제시했다. 제시된 설계데이타를 이용하여 위성이동통신용 안테나를 제작하고 복사패턴과 이득, 축비등을 측정하였다. 복사특성 측정치는 이론적 계산치에 근접하는 것으로 나타났으며, 이득을 제외한 다른 복사특성들도 설계사양을 만족하는 것으로 나타났다. The wire-grid model and moment method were adopted to analyze radiation characteristics of quadrifilar helix antennas with finite plate. Radiation characteristics for various structure parameters of the antenna were calculated and presented. A mobile satellite communication antenna was designed and manufactured by use of the presented data. The measured radiation charicteristics, such as axial ratio, half power beamwidth, radiation pattern are in good agreement with the computed results and well satisfy the design specifications except gain.

위암 환자의 복강내 투여를 위한 Activated Charcoal-Alginate Bead 제형으로부터 Mitomycin C의 용출 거동

이진호,최선웅,서중기,김동민,정경수,오정연,김진향,노승무,민병무,김용백,김창식,박근성,강대영,송규상,양준묵,조준식,정현용,김학용,인현빈 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.1

Locoregional recurrence is the most common type of recurrence in surgical operation of gastric adenocarcinoma, and peritoneal dissemination is one of the most difficult problems in advanced gastric adenocarcinoma treatment. Because the peritoneal cavity is the most common site of the first recurrence after gastric cancer resection, intraperitoneal chemotherapy seems a logical choice for cancer chemotherapy. In this study, Mitomycin C (MMC)-activated charcoal (CH)-alginate (ALG) beads were prepared by the mixtures of CH particles adsorbed with MMC as an anti-cancer drug and aqueous alginate solution. The alginate is recognized as biodegradable, nontoxic, and biocompatible. The release of MMC from the beads in 0.1 M Tris buffer was stable and continuous until about 1 week. The MMC-CH-ALG beads can be applied in the peritoneal cavity for intraperitoneal chemotherapy since they provide a good adhesiveness on the tissue and controlled release pattern of the drugs.

형광분광법에 의한 방향족 탄화수소의 동시정량

이상학,손범목 한국환경과학회 2003 한국환경과학회지 Vol.12 No.1

Synchronous spectrofluorimetry was carried out for the simultaneous determination of various polycyclic aromatic hydrocarbons(PAHs) in aqueous solution by fluorescence spectrometry have been studied. The optimal wavelength interval(Δλ) for synchronous spectra of acenaphthene, anthracene, benzo[a]anthracene, fluorene and pyrene were investigated in the presence of surfactants. The great enhancement of the fluorescence of these PAHs in Triton X-100 was obtained and optimal wavelength was 50 nm. The calibration curves in synthetic mixture solution of 5 PAHs were linear over the range from 1.0x10^-8M to 1.0x10^-4M. Under the optimal experimental conditions, the detection limits were 4.9x10^-9M, 7.0x10^-9M, 4.7x10^-9M, 1.6x10^-9M and 3.2x10^-9M for acenaphthene, anthracene, benzo[a]anthracene, fluorene and pyrene, respectively.

固定化 微生物을 이용한 難分解性 有害化學物質의 分解 除去

李秉學,林洛俊,尹盛都 단국대학교 1994 論文集 Vol.28 No.-

Degradation and removal of poisonous materials by immobilized microorganism was investigated. Microorganism which was isolated from activated sludge by enrichment culture method was adsorbed on activated carbon and then entrapped with alginate. Optimum immobilizing condition was determined by means of batch culture method. Packed bed bioreactor was used for continuous treatment of various phenol waste water. From the results the following phenomena were obtained. 1. Immobilized biocatalyst which shown best degradation rate and stabilization was prepared with 2% activated carbon and 1% microorganism. 2. As transient inflow in the packed bed bioreactor, in order to the highest degradation efficiency, it preper to use calcium alginate bead. 3. Degradation efficiency of phenolic waste water by composite immobilized biocatalyst (activated carbon-alginate) was influenced by quantity of microorganism and an increment of adsorptivity of activated carbon entrapped in the immobilized biocatalyst. 4. The optimum degradation condition of phenolic waste water which was determined to the mineral salts as nitrogen source and 1.5% glucose was contained at 30℃.

임신중 우측난소의 자궁내막장종의 성장과 파열의 1례

이종학,홍순도,남상욱,최종호,허광현,박일영 啓明大學校 醫科大學 1993 계명의대학술지 Vol.12 No.2

계명의대 산부인과에서 35세된 경산부에서 임신과 동반된 우측 난소의 자궁내막낭종의 성장과 파열을 경험하였기에 이에 문헌고찰과 함께 보고하는 바이다 Pregnancy had long been considered to have beneficial effect on endometriosis. During the pregnancy, extrauterine endomertrial tissues did not growth or enlarged because of physiologic amenorrhea and producing hormonal effect. However, we experienced a patient who underwent emergency exploratory laparotmy at gestation week 34/4 for rupture of an ovarian endometriotic cyst. The patient had a Cesarean section delivery of a 1,960gm female baby, who died at 1st day of life.