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수용액중에서 아세틸피리딘류의 해리에 미치는 온도와 압력의 영향
黃正儀,鄭在元,鄭載植 慶北大學校 1990 論文集 Vol.49 No.-
The dissociation constants of 2-, 3- and 4-acetylpyridine were measured by conductometric method in the temperature range from 15 to 40℃ and pressure up to 2,500bar. The dissociation constants of these substituted pyridines were increased as the temperature increase but decrease as the pressure. From the data thermodynamic properties were calculated and the Hammett plat were obtained. From these properties the characteristic properties of the dissociation reaction were discussed.
임의재,이동준,김문철,이상준,김명화 인제대학교 2009 仁濟醫學 Vol.30 No.-
Abdominal aortic aneurysms rarely occur with cancerous lesion but occasionally with gastrointestinal malignancy, and need absolute blood pressure control to prevent rupture. A 71 year old male who complained dizzness and hematochezia. He has been managed for hypertension, stable angina and abdominal aortic aneurysm which diagnosed 2months ago. He was diagnosed as advanced gastric adenocarcinoma and subtotal gastrectomy was performed. General anesthesia was scheduled and epidural catheterization was performed to controll intraand post operative pain and minimize hemodynamic change to prevent aneurysmal rupture 37.5mg of Ropivacaine was injected through epidural catheter before anesthesia and infusion of remifentanyl and propofol was performed during general anesthesia. The blood pressure was maintained between 95/50 and 145/95 and did not significantly increased. The general-epidural combined method was successfully performed and we are report this case with a brief review of the literature.
황정의,정재원,장경희 慶北大學校 自然科學大學 1987 自然科學論文集 Vol.5 No.-
The dissociation constants of 2, 3-, 2, 4-, 2, 5-and 3, 5-dimethylpyridine were measured by conductometric method at various temperatures (15∼40℃) and pressures (1∼2500 bar) in aqueous solution. The shift of dissociation constants of methylptridines from pyridine were explained by the I-effect and cooperative effect of the methyl groups. From the dissociation constants various thermodynamic properties were calculated and discussed the characteristics of the dissociation reactions.