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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)
정규원(Kyu Won Chung),정환국(Whan Kook Chung),최규용(Kyu Yong Choi),한석원(Suk Won Han),이영석(Young Suk Lee),안병민(Byung Min Ahn),김재광(Jae Kwang Kim),조세현(Se Hyun Cho) 대한소화기학회 1988 대한소화기학회지 Vol.20 No.3
Hepatocellular carcinoma is one of the commonest malignances reported in most of the Africa and South-east Asia. Hepatocellular carcinoma usually spread to regional lymph nodes around porta pepatis via lym- phatics and venous metastasis can occur via intrahepatic vein. The lungs are most common distant metastatic sites followed by adrenals, local lymph nodes and bones. Recently we experienced a case of the hepatocellular carcinoma who was admitted due to para- plegia for 2 months. Computed tomography disclosed destruction of 4th and 5th dorsal vertebral bodies and narrowed 3rd and 4th dorsal vertebral canal. After emergency total laminectomy the resected mass was confirmed metastatic, trabecular type of hepatocellular carcinoma. The patient was found later to have hepatoma in the liver with cirrhosis.