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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)$^{\circ}$.
최황 ( Hwang Choi ),최규용 ( Kyu Yong Choi ),이보인 ( Bo In Lee ),김민국 ( Min Kuk Kim ),정현정 ( Hyun Jung Jung ),지정선 ( Jeong Seon Ji ),김태호 ( Tae Ho Kim ),오정환 ( Jung Hwan Oh ),이강문 ( Kang Moon Lee ),김상우 ( Sang Woo 대한장연구학회 2007 Intestinal Research Vol.5 No.1
Background/Aims: The diagnosis of small bowel stricture was made by operation. Capsule endoscopy has been useful for diagnosis of small bowel diseases but has limited value in cases with stricture. Double balloon endoscopy is the useful method to visualize the entire small bowel. The aims of this study are to evaluate the feasibility of double balloon endoscopy and to differentiate the endoscopic findings in patients with small bowel stricture. Methods: Between March 2004 and February 2007, fifteen consecutive patients were referred for the evaluation of small bowel stricture. Small bowel strictures were suspected in small bowel series and CT in eleven patients. Capsule endoscopies were performed in six patients and entrapped in three patients. Double balloon endoscopy (EN-450P5/20, Fujinon, Japan) was performed with midazolam (median 5 mg, range 5-10 mg) and meperidine (median 50 mg, range 50-100 mg). All lesions except one were found within 60 minutes. One patient had been excluded because of false-positive finding of capsule endoscopy. Clinical and endoscopic findings were compared between strictures of Crohn’s disease (group I, n=6) and those of other causes (group II, n=8). Results: Double balloon endoscpies were performed with good tolerance without side effect. Age, chief complaints, duration of symptom, and initial hemoglobin and serum albumin levels were not different between two groups. The proportion of male sex was higher in group I than group II (100%, 38%, respectively; p=0.031). The strictures below 0.5 cm in diameter were 83% in group I and 13% in group II (p=0.026). The arrangement of stricture in group I was more eccentric than that in group II (100%, 17%, respectively; p=0.015). The location of stricture, appearance of surrounding mucosa, associated ulcer, and ulcer margin were not different between two groups. Conclusions: Endoscopic differentiation using double balloon endoscopy can be made easily and safely in patients with small bowel stricture. The strictures of small bowel in patients with Crohn``s disease were narrower and more eccentric than thosein patients with other diseases. (Intest Res 2007;5:38-44)
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)