Co(ll)이온과 N₂O₂계 거대고리 리간드와의 착물형성에 관한 연구

최규성,성찬기,정윤숙 慶南大學校 附設 基礎科學硏究所 1989 硏究論文集 Vol.1 No.-

The protonation constants for the macrocyclic ligands containing nitrogen and oxygen donors such as 1, 12-diaza-3,4 : 9, 10-dibenzo-5, 8-dioxacyclopentadecane(NtnOenH₄), 1, 13-diaza -3,4 : 10, 11-dibenzo-5, 9-dioxacyclohexadecane( NtnOtnH₄) have been determined by potentiometric titration at 25℃. In order to obtain the enthalpy and entropy changes of complexation reaction of Co(II)ion with these ligands, the stability constants have been measured by uv-vis spectrophotometric method at 20~45℃. Protonation constants and stability constants have been found to be effected by the basicities of the macrocyclic ligands. The complexation reactions are exothermic and show the positive entropy changes. ?? studies showed that the stepwise additions of Co(II) ion the macrocyclic ligands of constant concentration induced spectral changes. The large chemical shifts of protons nearest aside the nitrogen were noticeable with the addition of Co(II) ion.

N₂O₂계 거대고리 리간드와 중금속 이온과의 착물형성에 관한 연구

최규성,김정,정윤숙 경남대학교 환경문제연구소 1989 환경연구 Vol.11 No.-

The protonation constants for the macrocyclic ligands containing nitrogen and oxygen donors such as 1,12-diaza-3, 4 : 9, 10-dibenzo-5, 8-dioxa-cyclopentadecane(NtnOenH₄), 1, 13-diaza-3, 4 : 10, 11-dibenzo-5, 9-dioxacyclohexadecane(HtnOtnH₄) have been determined by potentiometric titration at 25°C. In order to obtain the stability constants of complexation reactjon of Zn(Ⅱ), Cd(Ⅱ) ion with these ligands, half-wave potential have been measured by polarographic method at 25°C. Protonation constants and stability constants have been found to be effected by the basicities of the macrocyclic ligands and macrocyclic effect.

정상인과 정신지체인의 치아우식증과 치아우식 원인균, 타액내 면역항체의 비교

최세원,양규호,최남기,강미선,임회순,오종석,김선미 대한소아치과학회 2007 大韓小兒齒科學會誌 Vol.34 No.3

補强 開口部를 갖는 合成보의 擧動에 관한 硏究

崔山鎬,梁永晟,金圭石,金錫中,金弼中 江原大學校 産業技術硏究所 1991 産業技術硏究 Vol.11 No.-

A model for the strenghth of composite beams with reinfforced web openings is presented. All of theh models are based on the static theorem of ultimated strength of reinforced rectangular perforated composite beam and is compared to the test.

충남대학교병원 마취발전의 경향에 관한 분석 : 1967년부터 - 1996년까지 from 1967 to 1996

최세진,김상수,정규돈,윤석화,신용섭,손수창,이원형,김혜자,이정은 충남대학교 의과대학 지역사회의학연구소 1998 충남의대잡지 Vol.25 No.2

To evaluate the specificity and historical trends of the anesthesia in Chungnam National University Hospital, anesthetic experiences of 83,572 in total performed at Chungnam National University Hospital from January 1967 to December 1996 were analyzed statistically and clinically according to age, sex, surgical department, physical status, elective and emergency surgery, premedicants, IV anesthetics, anesthetic methods, inhalational anesthetics, muscle relaxants. The results were as follows : 1. The number of cases has been steadily increased year by year. 2. The ratio of male to female was 52.8% : 47.2%. 3. According to the age, There were 44,905 cases (54%) in the group of 13-45 years. 4. According to the ASA classification of physical status, most of the cases were belonged to the class 1 & 2 (72.5%). 5. The ratio of elective to emergency was 79.4% to 20.6%. 6. Recently, glycopyrrolate has been used increasingly. 7. Thiopental sodium has been mainly used for intravenous induction agent. 8. General anesthesia has been used mainly. 9. Enflurane is the most common inhalational anesthetic agent. but Isoflurane has been used increasingly. 10. Most of muscle relaxants are Pancuronium & Vecuronium(84.5%).

안면부에 발생한 고정형 스포로트리쿰증 3례

최윤애,류영욱,정재봉,송준영,이규석 啓明大學校 醫科大學 1993 계명의대학술지 Vol.12 No.3

We experienced 3 cases of fixed type cutaneous sporotrichosis confined to the face. Case 1 was a 32-month old child, affected over the nose. Case 2 was a 25-year old man, affected over the left cheek. Case 3 was a 71-year old man, affected over the nose. Histopathologically, chronic granulomatous inflammation with pseudoepitheliomatous hyperplasia was observed. Mycologically, typical dark brown to black colored colonines with moist, wrinkled and membranous surfaces were cultured. All patients were completely cured by oral administration of saturated KI and itraconazole combined therapy in a short period(40-90 days).

심실중격결손을 동반한 폐동맥폐쇄에서 선천적우회순환의 기시 및 분포 : A Cineangiographic Study

최재영,이종균,차응석,설준희,이승규,최규옥 대한순환기학회 1998 Korean Circulation Journal Vol.28 No.9

초등학교 아동의 장애관련 용어에 대한 이해력 및 인식에 관한 연구

최성규,이숙조 대구대학교 특수교육재활과학연구소 2005 특수교육재활과학연구 Vol.44 No.1

통합교육의 효율성은 장애아동을 지도하는 교사, 학부모, 그리고 장애아동을 포함한 일반아동의 태도에 기초한다는 선행연구가 보고되고 있다. 본 연구는 초등학교 아동의 장애관련 용어에 대한 인식을 알아보기 위하여 수행되었다. 초등학생 4, 5, 6학년 350명을 대상으로 '장애자'라는 어휘에 대한 마인드맵 분석을 통하여 일차적으로 일반용어 20개, 장애관련 용어 20개, 장애관련 속어 20개를 선정하였다. 전문가와의 협의를 통하여 유목별로 각각 10개의 어휘를 선정하여 최종적으로 30개 어휘에 대한 태도를 분석하였다. t 검증과 다변량 분석을 통하여 초등학생의 장애관련 어휘에 대한 태도를 분석하였다. 본 연구에서는 초등학생의 장애관련 어휘와 장애관련 속어에 대한 이해력은 일반 용어에 비해 낮은 것으로 나타났으며, 장애관련 어휘보다는 장애관련 속어에 대한 이해력이 상대적으로 낮았다. 학년이 올라갈수록 세 영역의 어휘에 대한 이해력은 점차 향상되지만, 일반용어와 비교하여 장애관련 용어와 속어에 대한 현저한 이해력의 차이는 나타나지 않는다. 그러나 여학생은 남학생에 비해 장애관련 용어에 대한 이해력의 현저한 차이가 나타나지만, 장애관련 속어에 대한 이해력의 차이는 성별에 따라 달리 나타나지 않는다. 따라서 장애관련 속어에 대한 초등학생의 이해력에 대한 학년과 성별에 따른 용어에 대한 이해력의 고착화는 용어의 특성으로 사료된다. 또한 동일한 의미의 용어와 속어 등에 있어서 초등학생은 일관되게 인식하는 것이 아니라, 용어의 성격에 따라서 인식 또한 달라질 수 있음을 본 연구에서는 제시하였다. The purpose of this study is to grasp the recognition and the values of the elementary school students about the disability and to propose the direction for the cultivation of positive perception. Questionnaire was carried out for 500 elementary school students, which was verified by multi-variables analysis and SPSS statics program was used. As a result of this research, we could see that the understanding for terminology and colloquial language related to disability became lower due to the social deficiency of education and experience related to disability, and that elementary school students had the negative recognition for the disability because the social negative prejudice against the disability adhered to elementary school students, and this adherence was more noticeable for the colloquial language related to disability. In order to cultivate the elementary school student's recognition for disability positively, we should make them have experiences for disability by various methods directly or indirectly.

플레이트거더의 전단강도

최취경,김태영,서성연,김정석,김상섭,김규석 대한건축학회 2003 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.23 No.1(구조계)

In the design of plate girder web panels, it is required to evaluate accurately the elastic buckling strength under pure shear. Whether or not the post-buckling strength is accounted for. Currently. Elastic shear buckling coefficients of web panels stiffened by transverse intermediate stiffeners are determined by assuming conservatively that web panels are simply supported at the juncture between the flange and the web. Although the notion of the real boundary condition at the juncture of the web and flanges to be somewhere between simple and fixed has been recognized from early days, the boundary condition has been conservatively assumed. Mainly due to lack of means to evaluate it in a rational manner. In this paper. A series of numerical analyses based on a three-dimensional finite element modeling is carried out to investigate the effects of the geometric parameters on the boundary conditions at the juncture between the flange and the web.

Bacillus sp. CS-17을 이용하여 제조한 청국장의 발효기간에 따른 향기성분 변호

최웅규,이석일,손동화,지원대 한국위생과학회 2002 한국위생과학회지 Vol.8 No.2

전통식으로 담근 청국장과 Bacillus sp. CS-17을 이용하여 제조한 청국장의 향기성분을 비교하였다. 전통식으로 제조한 청국장에서 동정된 향기성분은 hydrocarbone류가 5종, alcohol류가 5종, ester류가 4종, acid류가 3종, aldehyde류가 2종, ketone류가 2종, phenol류가 3종, furan류가 2종, pyrazine류가 4종 등 30종이 확인되었다. Bacillus sp. CS-17을 이용한 청국장에서 동정된 향기성분은 hydrocarbone류가 3종, alcohol류가 2종, aldehyde류가 2종, ketone류가 2종, phenol류가 3종, furan류가 3종, pyrazine류가 5종, pyridine류가 3종, 질소함유화합물로는 2종, thiazole류가 1종, 기타 화합물로 1종 등 모두 27종이 확인되었다. 동정된 성분 중에서 2-hydroxy-6-methylbenzaldehyde, 2-heptanone, 2-furancarboxaldehyde, 2.3-dimethyl-5-ethylpyrazine, 2-picoline, 3-picoline, 5-ethy1-2-picoline, trimethyloxazole, 1,2,6-trimethylpiperidine, 2,4,5-trimethylthiazole 및 chloroform 등의 성분들은 전통식으로 제조한 청국장에서는 확인이 되지 않았으나, Bacillus sp. CS-17을 이용한 청국장에서는 동정되었다. This study was conducted to compare flavor components of chunggugjang fermentated with Bacillus sp. CS-17 to those of traditional chunggugjang. 30 flavor components identified in traditional chunggugjang. 30 flavor components identified in traditional chunggugjang were five hydrocarbones, five alcohols, four esters, three acids, two aldehydes, two ketones, three phenols, two furans and four pyrazines. 27 flavor components identified chunggugjang fermentated with Bacillus sp. CS-17 were three hydrocarbones, two alcohols, two aldehydes, two ketones, three phenols, three furans, five pyrazines, three pyridines, two nitrogen containing compounds, one thiazole and one other compounds. Among the detected components, 2-hydroxy-6-methylbenzaldehyde, 2-heptanone, 2-furancarboxaldehyde, 2,3-dimethyl-5-ethylpyrazine, 2-picoline, 3-picoline, 5-ethy1-2-picoline, trimethyloxazole, 1,2,6-trimethylpiperidine, 2,4,5-trimethylthiazole and chloroform were identified in chunggugjang fermentared with Bacillus sp. CS-17, but not in traditional chunggugjang.