N-벤조일-이미다졸 유도체의 가수분해반응

성대동,엄태섭,이종팔,박유미,박현석 東亞大學校 1992 東亞論叢 Vol.29 No.1

The pseudo first order rates for hydrolyses of N-benzoyl-(2,4,5-triphenyl)-imidazole and N-benzoyl-(4,5-diphenyl)-imidazole have been measured by means of spectrometry in over all pH range at 30˚C with the ionic strength of 0.5M KC1. In the case of N-benzoyl-(2,4,5-triphenyl)-imidazole, the general acid catalytic reaction was not observed, while the general base catalytic reaction showed in near the range of pH=7. In the case of N-benzoyl-(4,5-diphenyl)-imidazole, the general acid and base catalytic reaction showed at the regions of less than pH=4 and more than pH=10. The rate constants for pH independent reaction of N-benzoyl-(2,4,5,-triphenyl)-imidazole were shown a little bit faster than those of the corresponding to N-benzoyl-(4,5-diphenyl)-imidazole. The reaction mechanism of pH independent reaction was interpreted by means of thermodynamic parameters, and the isotope effect. The magni-tude of ΔH??, ΔS??, ??/?? values indicated that the bond breaking had been progressed more than bond formation in the transition state.

노랑제비꽃 자생지의 생육환경과 토양환경간 상관성

유주한,정성관,박경훈,김경태,이우성 慶北大學校農業科學技術硏究所 2007 慶北大農學誌 Vol.25 No.-

This study was carried out to offer the raw data of floricultural resource by scientific analyzing the growth and soil environment in Viola orientalis habitat, and establish the ecological characteristics in developing the relative model. In the results of soil factors analysis, there showed that acidity was pH 5.1, organic matter content of 9.1 %, available P₂O_(5) of 40.6mg/kg, exchangeable K^(+) of 0.2cmol^(+)/kg, exchangeable Ca^(2+) of 3.5cmol^(+)/kg, exchangeable Mg^(2+) of O.8cmol^(+)/kg, cation exchange capacity(C.E.C) of 13.7 cmol^(+)/kg and electrical conductivity(EC) of 0.4dS/m. The growth characteristics were surveyed that height was 12.4cm, leaf width of 2.5cm, leaf length of 3.0cm, flower width of 2.5cm, peduncle of 2.3cm and chlorophyll of 38.5pg·mg^(-1).

유구치 상아질의 각 부위에 적용된 수종의 복합레진 접착제의 미세인장접착강도에 관한 연구

유정은,최영철,최성철,박재홍 大韓小兒齒科學會 2009 大韓小兒齒科學會誌 Vol.36 No.3

본 연구는 유구치 상아질의 각기 다른 부위(표층부, 심층부, 치경부)에서 복합레진 접착제의 접착강도를 비교, 평가하기 위하여 임상에서 흔히 사용하고 있는 서로 다른 4종의 접착방식(3-step total etch: 1군, 2-step total etch: 2군, 2 step self-etch: 3군, all-in-one: 4군)을 적용하고 복합 레진(Light-Core™ Core Build-Up Composite)을 적층한 후, 미세인장접착강도를 비교하였을 때 다음과 같은 결과를 얻었다. 1. 접착방식간의 비교에서 레진의 접착방식에 따른 상아질 각 부위에서의 미세인장접착강도는 제 1군이 표층부에서 뚜렷이 높았으나(p<0.05) 2, 3, 4군은 부위에 따른 차이가 없었다. 2. 부위별 미세인장접착강도를 비교하여 보았을 때 상아질 표층부에서의 미세인장접착강도는 레진의 접착 방식간에 차이가 없었으나, 심층부에서는 2군, 3군, 4군 및 1군의 순으로 나타났고(p<0.05), 치경부에서는 2군과 3군이 1군과 4군에 비하여 현저히 높았다(p<0.05). The purpose of this study was to evaluate the micro-tensile bond strength (μTBS) of four luting resin to regional dentin of human primary teeth. Dentin from non-carious primary molars were prepared from different regions(s, superficial dentin; d, deep dentin; c, cervical dentin), and divided into groups based on anatomical locations and types of luting resins(Scotchbond Multi-purpose: SB ; One-Step: as ; AdheSE Bond: ASE ; G-Bond : GB) : SB-s, SB-d, SB-c; OS-s, OS-d, OS-c; ASE-s, ASE-d, ASE-c ; GB-s, GB-d, GB-c. Luting resins were used according to the manufacturers' instructions, to bond Light-Core™ Core Build-Up Composite) to the exposed dentin specimens in the light-curing mode. After storage for 1 day, μTBS was tested at a cross-head speed of 1 mm/min. Data were analyzed with T-test and two-way ANOVA. The bonding interface and fractography analyses were performed with SEM. The results were as follows : 1. μTBS to superficial dentin was significantly higher than to deep dentin for SB(p<0.05). But there were no significant differences in regional μTBS among as, ASK GB(p>0.05). 2. There were no significant differences in μTBS to superficial dentin among each groups. But, in deep dentin, μTBS of SB-d was significantly lower than those of OS-d, ASE-d, and GB-d(p<0.05). μTBS of OS-d was significantly higher than those of GB-d(p<0.05), but there were no significant differences in μTBS of ASE-d. There were no significant differences among μTBS of ASE-d, OS-d, and GB-d.

화자의 양상에 따른 시 교육의 여러 층위

유성호 한국문학교육학회 2002 문학교육학 Vol.10 No.-

Speaker says situation and the reaction in the poetry. It is sometimes confessional and autobiographical. sometimes fictitious and casted. Yun, Dong-ju is in one extreme and Seo. Jung-ju is in the other extreme. There is Jung. Ji-yong between them. Although Ji-yong's potry has fictitious side. it has his own cognition and life story. Speaker is one of the important aesthetic strategies to show poet's attitude on the world. We need to speaker and hearer as important. because they are one of the literary strategies to make experiences into symbolic stories. And the points are a fictitious aspect and its degree of speaker and hearer. A fictitious speaker is useful that the universal thing is revealed out of chain of personality. An autobiographical speaker is good to express confession and truth. The receptive extent and theme are depend on speaker's changing aspect. As a result, we can find a suitable reading method according to various speakers of modern poetry. Therefore we can understand the text well. Furthermore, we can reach genre's understanding based on the speciality of poetic language. Using such a method in school is useful in reading efficiency and sympathy.

비아그라??복용 후 발생한 급성 심근경색증

유지영,왕순주,조성훈 대한응급의학회 2001 대한응급의학회지 Vol.12 No.2

Erectile dysfunction(ED) is defined as the inability to achieve and/or maintain an erection which is sufficient for satisfactory sexual activity. Risk factors for ED include many of the same risk factors for cardiovascular disease: hypertension; lipid abnormalities, including low high-density lipoprotein cholesterol; diabetes; and smoking. Therefore, some patients with ED will have ischemic heart disease. Viagra□, an oral therapy for ED, is the citrate salt of sildenafil, a selective inhibitor of cyclic guanosine monophosphate(cOMP)-specific phosphodiesterase 5(PDE5). The adverse effects of sildenafil include headache, flushing, dyspepsia, nasal congestion, visual disturbance, and cardiovascular complications. A general impression exists that cardiovascular complications of sildenafil occur mainly when the drug is taken concomitantly with nitrate. We report the case of a 52-year-old man who developed an acute myocardial infarction shortly after taking one tablet of sildenafil without sexual activity. The patient had not been using nitrates. Physicians treating patients with chest pain should be aware of the potential consequences of giving nitrates to patients taking sildenafil. We suggest that before initiating therapy, the history of sildenafil ingestion be obtained from patients with suspected myocardial infarction.

韓國 妊婦의 TORC H病原體에 關한 抗體 保有에 關한 硏究

柳承一,金善行,洪性鳳 고려대학교 의과대학 1985 고려대 의대 잡지 Vol.22 No.3

During the recent 15 years, there was a significant changes in the incidence of viral infection in pregnancy. In addition, TORCH agents are the most prevalent microbes among them, and their infections during pregnancy, either primary or recurrent, may affect the feauses in utero and the neonates at the time of delivery. Although we have achieved some progress in controlling them in the view point of prevention and treatment, but it is still insufficient. The purpose of this study is to determine the baseline prevalence of antibodies for TORCH agents during various stage of pregnancy in Seoul, Korea. From 92 asymptomatic pregnant women, 92 single serum sample were taken and examined the antibodies for TORCH agents by ELISA (C.M.V., R.V., H.S.V.) and H.A.I. test (Toxoplasmosis). The followings are the results. 1. The prevalences of antibodies to each of the TORCH agent were 1.08% for toxoplasma, 93.47% for C.M.V., 71.73% for R.V. and 84.74% for H.S.V. 2. The prevalences of antibodies for C.M.V. and R.V. were much higher in the term pregnancy group compared to early pregnancy. This findings suggest some evidence of vulnerability to viral infection during pregnacy. 3. The prevalences of C.M.V., R.V. and H.S.V. antibodies were in parallelism with the increasing age of women. Almost all women over 30-35 years had C.M,V., R.V., H.S.V. antibodies. 4. In multiparous women, the prevalences of antibodies for TORCH agents were higher than that in nulliparous women. 5. In the women with history of previous fetal wastage, the prevalence of TORCH antibodies were higher especially for C.M.V. compared with women without past history of previous fetal wastage.

Backward Sway 동안의 자세움직임 형태에 대한 근전도와 생체역학적 분석

류승현 한국전문물리치료학회 1995 한국전문물리치료학회지 Vol.2 No.2

排便 造影術에서의 正常値 및 非正常値의 分析

兪長壽,金相煥 대구산업정보대학 1998 논문집 Vol.12 No.2

This study was done to analysis of normal finding factors and abnormal finding factors of defecography by using fluoroscopy. The defecographic results were screened for the anorectal angle and perineal descent at rest, squeezing and during straing. Changes of rectal configuration and rectal canal width during straining were reviewed. Rectocele, rectal intussusception, and incontinence were observated. Contrast media of this study to make be very similar stool and before examination operators should explain methods of defecography to patient. Normal anorectal angle was measured to be 90˚, 80˚, 130˚ at rest, during squeezing, and straining respectively. In the spastic pelvic floor syndrome, increase of anorectal angle less than 10 degrees from rest to straining was observed. Incontinent patients had a large anorectal angle (mean 128˚)at rest. 7.8cm of perineal descent was found in descending perineal syndrome in comparison to 4.0cm in normal. Normal anal canal width was measured 1.4cm during straining but anal canal width in incontinenct patient was measured 1.2cm at rest. The anorectal angle was valuable in evaluation of spastic pelvic floor syndrome and fecal incontinence. In the cases of the rectoceles, anteroceles, and rectal prolaps, defecography is helpful in preoperative evaluation of rectal wall change and postoperative follow up.

성격의 변화를 수반한 Wilson씨병 1례

유세종,이상렬,박민철 圓光大學校 醫科大學 神經精神科學敎室 1994 圓光精神醫學 Vol.10 No.2

We had a 22 year old male patient with Wilson's disease showing neuropsychiatric symptoms. He showed neuropsychiatric symptoms such as personality change, regressed and childish behavior, wing-beating tremor and rigidity on the upper extrmity, open mouth, drooling, bradykinesia, dysarthria and dysphagia. In brain MRI findings, bilateral high signal intensity on T2WIs were observed in basal ganglia, thalamus, central midbrain and periaqueductal pons. In liver scan, splenomegaly was detected. At a slit-lamp examination, we detected the brownish colored pigments(Kayser-Fleisher ring) on Descement's membrain of both eye corneas. Laboratory findings were a low serum ceruloplasmin(2.63㎎/dl, normal: 25~45㎎/dl), low serum copper level(32㎍/dl, normal: 80~130㎍/dl), and an increased 24 hous urine-copper excretion level(258㎍/day, normal: 15~30㎍/day). Therefore, we diagnose the patient as having wilson's disease and we started medication treatment with penicillamine.

RISC 프로세서의 파이프라인 처리방식에 관한 연구

유충열,김현주,이상일,김현욱 明知大學校 産業技術硏究所 1990 産業技術硏究所論文集 Vol.9 No.-

In the world of high speed computers, there are two main design philosophies-parallelism and pipelining. Pipelining is an effective method for reducing interchip communication while increasing performance. In this paper, we examine the pipeline handling strategy of RISC processors such as RISC Ⅱ, R2000, SPARC RISC CY7C600, and MC88100 in order to design MJU-DLX RISC in the future. Throughout the investigation, we determine the number of stage, number of register, and. control mechanism. Then, specification of MJU-DLX RISC has been presented for the future development.