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Toluene-4-sulfonic Acid 4-Allyl-2,6-dimethoxy-phenyl Ester
최규용,한병희,강성권,성창근,강상욱,서일환,Choi, Kyu-Yong,Han, Byung-Hee,Kang, Sung-Kwon,Sung, Chang-Keun,Kang, Sang-Ook,Suh, Il-Hwan Korean Crystallographic Association 2004 韓國結晶學會誌 Vol.15 No.1
上記 題目의 化合物, $C_{18}H_{20}O_5S$은 한 對非稱 單位內에 한 個의 分子를 가지고 對稱中心室間群 $P\={1}$로 結晶化 되었다. sulfonate 群內ml S 原子는 O와 C 原子들로 이루워진 四面體 環境을 維特하고 있으며, S-O 二重結合 平均 길이는 1.420(2) ${\AA}$이며 S-O 單一結合 길이는 1.598(2) ${\AA}$이고 S-C 結合 길이는 1.742(3) ${\AA}$이다. C(7)-S-O(3)-C(8) 의 비틀림 角은 100.3(2)$^{\circ}$이며, 두 個의 six-membered rings의 二面角은 42.73(20)$^{\circ}$이다. The title compound, $C_{18}H_{20}O_5S$, crystallized in the centrosymmetric space group $P\={1}$ with one molecule in an asymmetric unit. The S atom in the sulfonate group retains the overall tetrahedral environment of the O and C atoms with an average S-O bond of 1.420(2) ${\AA}$ for double bond and of 1.598(2) ${\AA}$ for single bond and S-C length of 1.742(3) ${\AA}$. The torsion angle C(7)-S-O(3)-C(8) is 100.3(2)$^{\circ}$ and the dihedral angle of the two planar six-membered rings is 42.73(20)$^{\circ}$.
지연용해형 캡슐내 방사선 비투과 표지자를 이용한 대장분절 통과시간
최황(Hwang Choi),최명규(Myung Gyu Choi),김병욱(Byung Wook Kim),김재광(Jae Kwang Kim),한석원(Sok Won Han),최규용(Kyu Yong Choi),정규원(Kyu Won Chung),선희식(Hee Sik Sun),박두호(Doo Ho Park),손형선(Hyung Sun Son) 대한소화기기능성질환·운동학회 2000 Journal of Neurogastroenterology and Motility (JNM Vol.6 No.1
N/A Backgrounds/Aim: Scintigraphic measurement of colon transit has proven usefu1 clinically and in the research area, however this method requires well equipped laboratories. The aim of this study was to develop a new colon transit test using radiopapue markers instead of radiolabeled pellets in a methacrylate-coated capsule. Methods: Ten healthy volunteer. were studied. After simultaneous administration of two methacrylate-coated gelatin capsules containing activated ehareoa1 mixed with 8 mCi of (99m)Tc or a commercially used radiopaque marker, scintigraphies and plain abdominal X-rays were performed. We compared colon transit profiles as the geometric center at 4, 8, 24, and 48 hours after ingestian of gelatin capsules. This new radiopaque marker test was validated with a scintigraphic method as the gold standard. Results: Geometric centers (mean±SEM) of (99m)Tc-scintigraphy were 0.50±0.18 at 4 hours, l.l6±0.05 at 8 hours, 3.31±0.36 at 24 hours, and 4.16±0.29 at 48 hours. Geometric centers of the radiopaque marker method were 0.40±0,16, 1.13±0.05, 3.33±0.37, and 4.18±0.30 respectively. Transit profiles were the same with both methods and highly correlated (r=0.994, p<0.001). The difference between the two methods against the mean for the geometric center was within 2SD. Conclusions : A colon transit test using radiopaque markers in a methacrylate-coated, delayed release capsule was inexpensive, simple, and reliable. This new test could be applicable when a gamma camera is not available. (Korean Journal of Gastrointestinal Motility 2000;6:52-60)
간장 및 담도 : 삼출성 복수증의 감별진단과 복강경 검사
정규원(Kyu Won Chung),차상복(Sang Bok Cha),선희식(Hee Sik Sun),김부성(Boo Sung Kim),정인식(In Sik Chung),안병민(Byung Min Ahn),김재광(Jae Kwang Kim),김태룡(Tae Ryong Kim),최규용(Gyu Yong Choi) 대한소화기학회 1990 대한소화기학회지 Vol.22 No.1
N/A Exudative ascites should initiate an evaluation for peritoneal processes, most importantly infection and tumor. And the pathological diagnosis is required for a approapriate treatment in most cases. To assess the diagnostic accuracy and complication rates of diagnostic laparoscopy in patients with exudative ascites we studied in 73 patients with exudative ascites retrospectively. Thirty three patients had malgnancy related ascites, and peritoneal carcinomatosis was confirmed in thirty one patients. Twenty seven patients had tuberculous peritonitis, and thirteen patients had miscellaneous causes, among them eight patients had underlying liver cirrhosis and clinically spontaneous bacterial peritonitis were suspected in three patients in whom bacteria were cultivated in ascites. Pancreatic pseudocyst and leakage into peritoneal cavity was confirmed by endoscopic retrograde pancreatography in one case, but the remained four cases had not known the diagnosis. The most common primary cancer was gastric carcinoma which was diagnosed in fourteen patients, and then ovarian cancer in five patients, colon cancer in four patients, pancreatic cancer in three patients, mesothelioma in one patient and unknown origin in four patients. Cytology evaluation of the ascitic fluid was positive for tumor cells in 62% of patients with peritoneal carcinomatosis. Blind Cope needle biopsy yielded positive diagnosis of neoplastic or tuberculous in 65.4 per cent of rases. The major and minor complication rates of laparoscopy were 0% and 26.4%, respectively, with no fatalities. These findings compare favorably with general experience. We conclude that laparascopy is relatively safe and accurate diagnostic method of choice in exudative ascites, especially in cases when other non-invasive methods were failed.