Pd 촉매 하에서 알릴 디올의 아릴화 연구 : 방향족 히드록시 케톤 및 페닐 치환된 알릴디올의 합성 Highly Selective Synthesis of Phenyl-Substituted Allylic Diols

강석구,정경윤,박찬희,남궁은영,김태현 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.2

The coupling reaction of iodobenzene with allylic diols in the presence of Pd(OAc)_2 and nBu_3P as catalysts using K_2CO_3 as base afforded the phenyl-substituted allylic diols. However, under the same reaction conditions with Et3N as base, phenyl-substituted α-hydroxy ketone was obtained.

압축력을 받는 결함이 있는 구조물의 주파수 해석

姜贊泳,柳擇仁,朴鳳賢,李晟熙,韓秉基 弘益大學校 科學技術硏究所 1998 科學技術硏究論文集 Vol.9 No.1

Vibration analysis of through-the-width-split beams for predicting buckling load is investigated based on Euler-Bernoulli beam theory. In split region, each segment is considered as a solid beam. In this region, recurrence equations relating integration constants for adjacent interior regions are established by satisfying continuity conditions at junctions of interior regions. The results of present study are compared with those of experiment and their results give good agreement with each other. From the result, it was shown that local buckling phenomena could appear in fundamental mode, however, there exists load carrying capacity after this phenomena.

카올린으로부터 합성된 고순도 알루미나의 γ→α변태에 미치는 Fe₂O₃첨가의 영향

강효경,박성수,박희찬 釜山大學校生産技術硏究所 1997 生産技術硏究所論文集 Vol.53 No.-

국내산 카올린으로부터 알루미늄황산염수화물을 합성하고, 이의 특성 및 열분해에 따른 알루미나의 γ→α변태에 미치는 Fe₂O₃의 첨가효과가 X-선회절분석, 시차열중량분석, 주사전자현미경, 플라즈마분광분석, BET법을 이용하여 검토하였다. 합성된 2 ㎛정도 크기의 판상입자형태로 구성된 고순도 알루미늄황산염은 Al₂(SO₄)₃·18H₂O로 동정되었으며, 이는 150℃ 부근에서의 탈수반응과 750℃부근에서의 탈황산반응을 경유하여 1000℃에서 결정성이 낮은 γ-Al₂O₃로 변화하였고, γ→α변태는 1200℃정도에서 일어났다. 0.1 wt% Fe₂O₃를 첨가한 경우의 1200℃하소물에서 생성된 FeAl₂O₄스피넬은 알루니마의 γ→α변태를 억제시켰으며, 그 이상의 양을 첨가한 경우와 1300℃로의 하소온도를 증가시킨 경우는 FeAl₂O₄의 α-Al₂O₃와 Fe₂O₃로의 분해 및 이온확산속도의 증가로 인하여 α-Al₂O₃생성이 촉진되었다. Aluminum sulfate hydrate has been prepared from the domestic kaolin, and its characteristics and the effect of Fe₂O₃addition on the γ→αtransformation of the resulting alumina have been investigated by means of the XRD, TG/DTA, SEM, plasma spectrometer, and BET methods. The aluminum sulfate having high purity and 2 ㎛-sized plate-like structure particles was identified as a crystalline Al₂(SO₄)₃·18H₂O, and decomposed to γ-Al₂O₃at 1000℃ via dehydration at ∼150℃ and desulfurization at ∼750℃. γ-Al₂O₃transformed to α-Al₂O₃at 1200℃. After calcination of the aluminum sulfate with addition of 0.1 wt% Fe₂O₃at 1200℃, the formation of FeAl₂O₄spinel prohibited the γ→αtransformation of the alumina. However, the addition of > 0.1 wt% Fe₂O₃and the increase in calcination temperature to 1300℃ accelerated the γ→αtransformation, due to the decomposition of FeAl₂O₄to α-Al₂O₃and Fe₂O₃and the velocity of ion diffusion, respectively.

유기구리시약을 이용한 광학활성 고리 카보네이트의 알릴화 연구

강석구,박찬희,정재욱 성균관대학교 기초과학연구소 1994 論文集 Vol.45 No.1

CuCN과 알킬리튬 시약을 이용하여 higher-order cuprate인 R_2Cu(CN)Li_2 또는 lower-order cuprate R_2Cu(CN)Li_2을 만들거나 Grignard시약과 구리촉매에 의해 R_2Cu(CN)MgX등을 형성시켜 이를 광학 활성 고리 카보네이트에 S_N2' 반응을 유도하여 높은 위치 선택성과 입체 선택성이 있는 광학 활성이 있는(E)-allylic alcohol 및 dienylic alcohol을 합성하였다. The S_N2'-type allylation reactions of chiral allylic cyclic carbonates with R_2Cu(CN)Li_2, R_2(CN)Li, or R_2Cu(CN)MgX afforded the alkylate(E)-allylic alcohol and dienylic alcohol with excellent high regio-and diasterecselectivity.

Pd(0)과 Ni(Ⅱ)촉매하의 Grignard시약에 의한 광학활성 고리카보네이트의 알릴화 연구

강석구,조동규,박찬희 성균관대학교 기초과학연구소 1993 論文集 Vol.44 No.2

NiCl_2(dppe)또는 Pd(PPh_3)_4를 촉매로 하여 Grgnard시약과 광학 활성 알릴고리 카보네이트를 반응시켜 높은 위치 선택성과 입체선택성이 있는 알킬화된 (E)-allylic alcohol을 얻었다. Reaction of chiral allylic cyclic carbonates with Grignard reagents in the presence of NiCl_2(dppe) or Pd(PPh_3)_4 as a catalyst afforded the alkylated (E)--allylic alcohols with high regio-and diastereoselectivity.

돼지설사 원인균 E. coli의 생육저해에 대한 유산균의 효과

姜國熙,成文喜,方泰瑛,龍球淵,林讚洙 成均館大學校 科學技術硏究所 1985 論文集 Vol.36 No.1

E. coli A_2 diarrhea causing bacteria of pigs was anaerobically inoculated with 10^5/ml into prereduced YS medium (10% reconstituted skim milk+0.1% yeast extract), and then lactic acid bacteria were inoculated with 10^5/ml and 10^7ml into previous inoculated samples of E. coli A_2. Inoculated samples cultured at 37℃, were tested to determine changes in viable numbers of organisms and pH. The experimental results are summerized as follows: 1. In the mixed culture medium of 10^5/ml E. coli A_2 and L. casei YIT9018, E. coli A_2 decreased after 36 hours from incubation. 2. In the mixed culture medium of 10^5/ml E. coli A_2 and L. acidophilus, E. coli A_2 drastically decreased after 24 hours from incubation and was almost disappeared after 72 hours from incubation. 3. In the mixed culture medium of 10^5/ml E. coli A_2 and L. bulgaricus, E. coif A_2 drastically decreased after 24 hours from incubation and was almost disappeared after 72 hours from incubation. 4. In the mixed culture medium of 10^5/ml E. coli A_2 and Str. thermophilus, E. coli A_2 decreased after 12 hours from incubation. 5. When the pH value of the mixed culture, was, 4. 5 below, E. coli A_2 decreased.

용인정신병원에 내원한 행려정신질환자들의 특성에 관한 조사

강희찬,오석배,이정균 大韓神經精神醫學會 1986 신경정신의학 Vol.25 No.1

This retrospective survey was designed to investigate the socio-demographic and psychiatric characteristics, and to clarify the tentative course of homeless mentally ill patients. One hundred and twelve homeless mentally ill patients who had been admitted to Yong-In Mental Hospital were selected during the period of March 1983 to Feb.1984. The results were as follows: 1)Sex ratio of the 112 subjects was 1: 1.5. Of these subjects, three-fourths were under 40 and 9 percent were above 50 years old. 2)Fifty-three percent had never married and 24percent already had divorced or seperated. Among above 30 of age, 41 percent had never marred ad 45 percent already had divorced or seperated. Seventy-three percent of men were unmarried. The proportion of divorced of women was higher than that of men. 3)Sixty-seven percent of the subjects were schizophrenia, 7 percent affective disorder, 8 percent alcohol dependency or alcoholic psychosis, 6 percent organic brain syndrome, and 9 percent epilepsy and mental retardation respectively. 4)Eighty five percent had more than two year of morbid duration and most of them took chronic course. 5)Fifty percent had history of previous psychiatric hospitalization, and 46 percent had history of asylum institutionalization. Only 23 percent had no history of psychiatric hospitalization or asylum institutionalization. 6)sixty three percent were hospitalized at Yong-In Mental Hospital over six-months. 7)referral sources at admission of Yong-In Mental Hospital were police, asylum and general hospital which 50 percent by police, 44percent asylum and 6 percent from general hospital. Thirty three percent of the 72 discharged patients were discharged by relatives(including family), and 51 percent have been referred to asylum. 8)The authors compared the characteristics, that of age, sex, marital status, clinical diagnosis, morbid duration admission duration and route of discharge between fresh cases who had no history of psychiatric hospitalization or asylum institutionalization. Also the authors compared the characteristics including history of previous psychiatric hospitalization or asylum institutionalization and source of referral between subgroup with relatives and subgroup without relatives.

단음절 합성단위음을 사용한 시간영역에서의 한국어 연속음 규칙합성에 관한 연구

강찬희,안영화 江南大學校産學技術硏究所 2004 산학기술연구소논문집 Vol.- No.18

본 논문은 시간영역에서의 한국어 연속음 규칙합성에 관한 실험적 연구결과이다. 특히, 단음절 단위음을 사용하여 연속음을 합성할 경우 음절간의 피치 불연속성으로 인한 자연성 및 음질이 저하되는 현상을 개선하고자 하였다. 이를 위하여 자연음으로부터 추출한 구문 단위의 피치 패턴을 보간법으로 생성시켜 합성하는 방법을 제안하였다. 중심주파수가 80, 118, 140, 170, 200Hz인 5가지 유형의 피치 패턴을 2음절어 및 3음절어에 각각 부여하여 합성시킨 합성음에 대한 MOS평가를 수행한 결과를 제시하였다. 실험결과, 제안한 시간영역에서의 합성방식에 의한 합성음의 음질은 명료하고 자연스러웠으며, 간단한 문장단위의 연속음 합성이 가능하였다. 운율요소의 제어결과는 지속시간(장단)과 악센트(강약)와 피치주기(억양) 및 에너지 패턴의 제어도 시간영역에서 가능하였다.

전시를 위한 토기와 청자의 복원 : 토기기대, 노형기대, 청자사이호를 중심으로

강희숙,안병찬 국립중앙박물관 1999 박물관보존과학 Vol.1 No.-

국립김해박물관 개관전시 유물인 가야시대 土器 器臺 2점과 중앙박물관의 특별전 “고대국가의 형성” 전시회 출품 유물인 靑磁四耳壺에 대한 보존처리를 수행하였다. 육안 및 실체현미경 관찰을 통하여 처리 전 상태, 文樣과 製作技法 등을 파악하였고 이를 토대로 각 유물의 특성에 맞는 보존처리를 실시하였다. 기대는 결실부분이 커 에폭시系 복원재료를 이용해 파손된 토기 面과 직접 접착시켜 형태를 복원하고 문양과 색, 질감을 類似하게 처리하였다. 청자는 토기와 같은 복원재를 이용했지만 파손된 청자 면과 分離시켜 형태를 복원하여 해체가 가능하도록 조치한 다음 색과 질감도 구분이 되도록 처리하였다. Conservation treatment was done for the pottery-stand of Gaya period which was to be exhibited in celebration of the opening of Gimhae National Museum and for the jar of Chinese celadon which was to be exhibited in Korea National Museums special exhibition "Formation of Ancient States". Through the examinations by naked eyes and under the microscope, condition before treatment, patterns and manufacturing techniques of the objects were observed. According to these examinations, conservation treatments, suitable for each object was finished. As the pottery-stand was damaged severely, the epoxy resin was pasted directly on the broken surface of the pottery to restore the original shape and pattern, color and feeling similar to original state were given to the restored area. Although same restoration material was applied on the celadon, it was not pasted directly on the broken surface of the celadon so that the restored area could be dismantled, and color and feeling were also treated somewhat differently.

Pd(O)-촉매를 이용한 알릴 고리 카보네이트의 제거 및 분자간 축합반응 연구

강석구,박동철,박찬희,홍륭기 성균관대학교 기초과학연구소 1995 論文集 Vol.46 No.1

The alkyl substituted allylic cyclic carbonates 1a-d undergo elimination by using a catalytic amount of Pd(0) complex to form dienols 2 a-b. However, on treatment of the unsubstituted or phenyl substituted allylic cyclic carbonates 1e and 1f with Palladium(0) catalyst, deprotonation-elimination of π-allyl Palladium complex followed by condensation with the other π-allyl Palladium complex provided the coupled products 3a and 3b, respectively.