Pollen Viability of Common Buckwheat (Fagopyrum esculentum Moench.) in in vitro Germination and its Application to Male Gametophyte Isolation

Woo, Sun-HeeㆍKeun-Yook ChungㆍHeung-Tae, KimㆍYong-Gu, ChoㆍHong-Sig, KimㆍBeom-Heon, Songㆍ Chul-Won, Lee and Seung-Keun Jong 忠北大學校 農業科學硏究所 2004 農業科學硏究 Vol.21 No.-

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三槽式便所를 設置한 濟州道內 一部落民의 寄生蟲感染率 推移

蘇鎭琸,李根泰,鄭坪林,李在興,李定熙,金英漢,洪淳億 최신의학사 1968 最新醫學 Vol.11 No.8

Three compartment stool tank system was established in March, 1965 to each of the houses . of Yongheungri, Cheju-do. The trend of parasites prevalence, faithfulness of the people to paractice the system and effectiveness of the system for destruction of ascaris eggs were examined. 1. Only 22 houses among 65 utilized the system for 3 years. The remained 43, gave up to practice; 10 because of the destruction of the cemented tank and 33 due to the shortage of. food stuffs, for hogs. In this island, the people have been raised hogs with human excrets. 2. The prevalence of ascaris infection in the village and in Sinwom-ri, a control village where the human feces were used as food stuffs for hog, were as follows: Yongheung(%) Sinwom(%) March 1965 before medication 52.0 43.0 Dec. 1965 after medication 15.1 21.2 Feb. 1968 22.7 30.8 3. Ascaris eggs in the 3rd compartment, were destroyed 94-100%, whereas the eggs in semi-formed feces in hog sty survived 94%.

지난 2년간의 학회지 "신경정신의학" 심사 평가보고

김찬형,김세주,김도관,김성곤,박원명,송동호,박용천,이영문,오강섭,정영철,이상열,김주한,이동영,이헌정,함병주,김율리,김문두,김정진,이강욱,천근아,김재진,홍진표,홍승철 大韓神經精神醫學會 2007 신경정신의학 Vol.46 No.6

쥐노래미 Hexagrammos otakii의 난소 발달단계에 따른 간세포의 활성변화

정의영,강희웅,이근우 한국어류학회 2002 韓國魚類學會誌 Vol.14 No.2

암컷 쥐노래미(Hexagrammos otakii)의 생식소중량지수(GSI)는 9월에 증가되기 시작하여 11월에 최대에 도달하였다. 쥐노래미의 생식주기는 연속적인 5단계로 나눌 수 있었다: 성장전기(7월), 성장후기(7~8월), 성숙기(9~10월), 완숙 및 산란기(9~12월), 회복 및 휴지기(12~6월). 간중량지수(HSI)의 월변화는 GSI변화와 유사한 경향을 보였다. 성장전기에 다량의 지방적과 글리코겐 입자들이 간세포내에 존재하였다. 특히, 이 시기에 간세포는 헤마톡실린에 약하게 염색되었다. 성장후기부터 성숙기에 간세포의 크기는 증대되었으며 간세포질내 글리코겐과 지방적들의 양은 감소된 반면, 호염기성 물질 축적이 증가하였다. 산란기부터 회복 및 휴지기에는 간세포내에 호염기성 물질 축적이 감소된 반면, 다량의 지방적과 글리코겐입자가 축적되었다. 간세포내의 총단백질, 총지질 및 글리코겐함량(%)의 최대값은 각각 9월(성숙기), 7월(성장전기), 3월(휴지기)에 나타났다. The GSI in the female greenling Hexagrammos otakii, began to increase in September and reached a maximum in November. The reproductive cycle of the greenling can be divided into five successive stage: early-growing stage(July), late- growing stage(July to August), mature stage(September to October), ripe-and-spent stages(September to December), and recovery-and-resting stages(December to June). Monthly changes in the HSI showed a similar pattern with those of the GSI. In the early- growing stage, a lot of lipid droplets, and glycogen particles were present in the cytoplasm of hepatocytes. Especially, the cytoplasm of hepatocytes were weakly stained with hematoxylin. In the late- growing to mature stage, hepatocytes became large, and the amount of glycogen and lipid droplets in hepatocytes gradually decreased, while basophilic substance increased. In the spawning to recovery-and-resting stages, basophilic substances decreased in the cytoplasm of hepatocytes. However, lots of lipid droplets and glycogen were stored in the hepatocytes. The maxium total protein, lipid and glycogen contents(%) in the hepatocytes appeared in September(mature stage), July(early-growing stage) and March(resting stage), respectively.

MIS設計의 組織構造的 側面에 관한 一考察

李根植,鄭相喆 충남대학교 경상대학부설 경영경제연구소 1984 경영논집 Vol.6 No.2

한국인 정신분열병과 양극성 기분장애에서 Ciliary Neurotrophic Factor(CNTF)유전자 변이에 관하여

이충숙,신석철,지익성,왕성근,이영호 대한신경정신의학회 2000 신경정신의학 Vol.39 No.4

정신분열병과 양극성 기분장애 같은 주요 정신질환의 발병에서 유전적 요인이 중요하게 작용한다. 최 근 정신분열병과 양극성 기분장애의 원인을 신경병리학적 연구와 신경영상학적 연구를 통하여 신경발달 학인 면에서 이해하려고 시도하고 있다. Ciliary neurotrophic factor(CNTF)는 해마신경원와 내측 중 격신경원을 포함한 다양한 신경세포의 강력한 생명 유지인자로 작용하여 중추신경계의 발달과 유지와 관련이 있는 것으로 여겨지면서, 주요 정신질환의 원인적인 요인으로 제시되고 있지만 이에 대한 연구결 과는 일치되지 못한 상태이다. 이에 저자 등은 한국인 정신분열병 환자 112명과 양극성 기분장애 환자 81명 그리고 정상 대조군 125명을 대상을 CNTF 유전자 변이와 연관성을 알아보고자 본 연구를 시행하여 다음과 같은 결론을 얻었다. CNTF의 유전자형은 정신분열병 환자군에서 N/N 80(70.4%), N/M 32(28.6%), M/M 0(0.0%)이 었고, 양극성 기분장애 환자군에서 N/N 58(71.6%), N/M 23(28.4%), M/M 0(0.0%)이었으며, 정상 대조군에서는 N/N 94(75.2%), N/M 30(24.0%), M/M 1(0.8%)이었다. 대립유전자의 빈도는 정신분 열병 환자군에서 N 192(85.7%), M 32(14.3%)이었고, 양극성 기분장애 환자군에서는 N139(85.8%), M 23(14.2%)이었으며, 정상 대조군에서는 N 218(87.2%), M 32(12.8%)이었다. 3군간의 유전자형과 대립유전자에서 유의한 차이가 없었다. 이러한 연구결과 한국인 정신분열병과 양극성 기분장애에서 CNTF 유전자의 변이가 원인적 요인으 로 작용할 것이라고 볼 수 없었다. Genetic factors play an important role in the development of schizophrenia and bipolar disorder, and recently the neural maldevelopment hypothesis is suggested by neuropathological and neuroimaging studies. Neurotrophic factors, including ciliary neurotrophic factor(CNTF), play a central role in the regulation of neural development. This study was designed to investigate the association between the null mutation of CNTF gene and schizophrenia and bipolar disorder in a Korean population. The CNTF gene were typed with polymerase chain reaction in 112 patients with schizo-phrenia, 81 with bipolar disorders and in 125 healthy controls. The distributions of the CNTF genotype in schizophrenic patients with N/N, N/M, M/M were 80(71.4%), 32(28.6%), 0(0%), in bipolar disorders were 58(71.6%), 23(28.4%), 0(0%) and in the controls were 94(75.2%), 30(24.0%), 1(0.8%). The allele frequencies of the CNTF gene in schizophrenic patients with N and M were 192(85.7%), 32(14.3%), in bipolar disorders were 139(85.8%), 23(14.2%), and in the control were 218(87.2%), 32(12.8%). There were no differences in the genotype distributions and the allele frequencies of CNTF gene null mutation among the 3 groups. These results suggest CNTF gene null mutation is not causally related to the development of schizophrenia and bipolar disorder in Korea.

자체정열 방법을 이용한 GR(Gate-Recessed) SOI

이충근,한명석,홍신남 한국항공대학교 1997 論文集 Vol.35 No.-

SOI(Silicon-On-Insulator)소자는 집적도의 향상, 단채널 효과의 감소, 임계전압 이하에서 기울기 향상, 높은 이동도, latch-up 제거 등의 우수한 이점을 제공한다. 그러나 SOI소자는 current kink와 early breakdown과 같은 floating-body effect를 나타낸다. Floating-body effect를 줄이기 위해 fully depleted SOI를 사용해야 하나 면저항이 크기 때문에 GR(gate-recessed) SOI가 제안되었다. GR SOI는 floating-body effect와 면저항을 줄일 수 있지만 공정상 복잡성이 따른다. 이 논문에서는 self-alignment method를 이용한 GR SOI 를 제안하여 이러한 문제를 해결하였다. 제안되 구조를 시뮬레이션한 결과 드레인 전류의 크기 향상, floating-body effect제거를 위한 imapct-ionization current를 감소시킬 수 있었다. SOI(Silicon-On-Insulator) devices offer unique advantages such as reduction in short channel effects, improvement of subthreshold slope, higher mobility, latch-up free nature and so on. But these devices have two problems; floating-body effect causing current kink and early breakdown effect. Fully depleted SOI reduces floating-body effect, but it increases sheet resistances. So gate-recessed SOI is proposed. Gate-recessed SOI can reduce sheet resistance and floating-body effect, but is processing step are complicated. In this paper, gate-recessed SOI using selt-alignment method is proposed to solve the above problems. Proposed structure improved drain current level, decreased sheep resistances of sourcd/drain regions and impact ionization current for removal floating-body effect

Disilver Cadmium Tetraiodide Membrane Electrode에 관한 연구

李根植,金禎姬 淑明女子大學校 1978 論文集 Vol.18 No.-

This experiment is concerned with determining the sensitivity, stability and reproducibility of Ag_2CdI_4 membrane electrode, the response of the electrode to Cd^2+ concentration, and the effect of inhibitor and pH of the solution. The ion-sensitive membrane electrode is prepared by mixing Ag_2CdI_4 with PVC power in 4 to 1 rato and pressing with IR pellet press. The observations may be summarized as follows: 1. The potential plot is linear with the slope of 27.0mV in the range of Cd^2+ conce ntration 1×10^-1M∼1×10^-5M, slightly deviated from the Nernstian value, but the stability and reproducibility of the electrode is quite acceptable. 2. The electrode is considered to be applicable in the pH range of 2∼9. 3. The electrode shows no definite sensitivity to any other cations or anions except Ag^+ and Hg^2+. 4. Using the electrode as indicator electrode, Cd^2+ solution is titrated with 0.1M NaOH standard solution by precipitation titration and EDTA complexometry.

골프장의 잔디 토양에서 살균제 Tolclofosmethyl의 분해

정근욱,우선희,김흥태,사동민,김영기,홍순달,김재정,이재구 한국환경농학회 2004 한국환경농학회지 Vol.23 No.3

Tolclofosmethyl (TCFM) is heavily and annually applied to the turf soils of most golf courses in Gyeongju to control the fungi known to cause the disease brown patch. The soil samples used for the experiment was collected three weeks after the annual application at the end of May in the year 2002. The preliminary results obtained from this study demonstrated that the repeated field annual applications of TCFM to the turf soils of a golf course located in Gyeongju city in the southern area of Korea showed the enhanced degradation of the parent compound TCFM, especially in the surface (0~15 cm) soil rather than the shallow subsurface (15~30 cm) and deep subsurface (30~45 cm) soils, compared to the corresponding surface (0~15 cm) and shallow and deep subsurface (15~30 cm and 30~45 cm) soils of the untreated plot. It appears that microorganisms in the soil may be involved in the enhanced degradation of TCFM.

通貨論的 接近方法에 의한 韓國 換率決定의 實證分析 : Kalman Filter를 이용하여 Using the Kalman Filter

정근존,이민환 한국경상학회, 한국국민경제학회 2003 경제연구 Vol.21 No.3

본 연구에서는 통화론적 모형에 근거하여 1996:Ⅰ-2001:Ⅳ의 분기별 원/달러 환율을 Kalman Filter를 이용하여 추정하였다. 추정결과 환율에 대한 통화량과 실질소득 변수의 추정계수들이 이론적 부호와 일치할 뿐 아니라 통계적 유의성이 높은 것으로 나타났다. 특히 통화량 변수ㄹ M1보다 시중의 유동성을 정확히 반영하는 M2, 더욱이 M3를 이용하는 경우에 통계적 유의성이 높을 뿐만 아니라, 추정계수의 크기가 증대하며 또한 우수한 예측력을 나타내고 있다. 아울러 외환위기를 겪은 1994년 4/4분기의 구조적 변동을 추정계수의 변화로 확인 할 수 있었다. 이러한 결과는 외환 및 자본자유화의 진전이 더욱 가속화되는 우리나라에서 환율변화에 대한 설명으로써 통화론적 접근 모형의 유용성이 증대되리라는 것을 시사한다. Based on the monetary approach, this paper estimates the exchange rate of Korea against U.S. in 1996:Ⅰ - 2000:Ⅳ using the Kalman Filter. The result shows that the estimated coefficients of money stock and real income are consistent with the theoretical signs and highly significant. Particularly, using the M2 and M3 instead of M1. the estimated coefficients are significant and increasing through t h e time with better forecasting ability. Also we found t h a t there was a structural change in exchange rate at the foreign currency crisis in the late 1997 in Korea. These results, in the face of more liberalization of foreign currency and capital movement, the monetary approach will be useful in explaining the change in exchange rate in Korea.