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최규석,성좌경,김계용,박송국 한국화학공학회 1966 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.4 No.3
Several studies have shown that bituminous coal can be used for the production of organic acids especially aromatic carboxylic acids, through oxidation. This research is concerned with the Korean anthracite could be used for the same purpose. In case of Changsung anthracite the maximum yield was obtained when the coal was oxidized for 100 minutes at the reaction temperature of 270℃ under the oxygen pressure of 880 psig. In addition, six other kinds of anthracite were also tested. Among those Yongwol anthractite which showed the best yield, yielded about 40% of water soluble organic acids on the amount of pure coal excluded moisture and ash. It was also shown that the organic acid yield is not related with the proximate analytical value of coal but with the structure of coal or reactivity of coal, and the organic acids produced were identified as benzene polycarboxylic acids by esterification and I.R. Spectra.
관상동맥조영술상 정상인 비심장성 흉통환자에서의 식도운동질환
이상곤(Sang Gon Lee),강영우(Young Woo Kang),김기식(Ki Sik Kim),김윤년(Yun Nyun Kim),김권배(Kown Bae Kim),김영국(Young Kook Kim),박송국(Soong Kook Park) 대한내과학회 1994 대한내과학회지 Vol.46 No.4
N/A Backgroud: Patients with angina-like chest pain, normal coronary arteries and normal cardiac function are in clinically important dilemma. So we evaluated the frequency of esophageal motility diusorder in patient with angina-like chest pain who had no abnormalities on coronary angiogram, Methods: 16 patients with normal ocronary angiography and angina-like chest pain had been underwent esophageal manometric study, bernstein test and edrophonium provocation test in Dongsan Hospital from Aug. 1988 to Oct. 1993. Results: Sixth decade was the most common age and sex distribution was equal. Common esophageal motility disorder in patients with noncardiac chest pain was nonspecific esophagal motility disorder (25.0%) and nutcracker esophagus (18.8%). Of the 16 cases with noncardiac chest pain, 8 cases (50.0%) had abnormal esophageal motility, which increased to 10 cases (62.5%) with combined provocation tests such as edrophonium and bernstein test. Conclusion: Combined tests of esophageal manometry, Bernstein test and Edroponium test should be done to evaluate esophageal motility disorders in patients with noncardiac chest pain.