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강혁주,김성욱,최석진,이중현,장재식,서영범,윤병구,박건욱,김성자,김용섭,강승완,이구,양창헌,이창우,김욱년,이광헌,서정일 동국대학교 의학연구소 2000 東國醫學 Vol.7 No.-
과립상 세포종은 Schwann 세포 기원으로 생각되며 인체에 비교적 드물게 발생한다. 과립상 세포종은 전신 어느 곳에서나 발견될 수 있으나 주로 혀, 구강, 피부 혹은 유방 등에서 호발하며 드물게 위장관에서 발견된다. 위장관에서는 식도에서 가장 호발하며 다음으로 위, 대장 순이다. 과립상 세포종은 대부분, 특히 위장관에서는 양성이며 소수의 악성 병변이 보고되었다. 이러한 이유와 함께 수술 전의 진단이 어렵기 때문에 과립상 세포종에 대한 근본적인 치료는 현재까지 외과적 절제술이다. 최근에 시도되는 치료방법들로는 내시경적 레이저 치료, 용종절제술, 내시경적 점막 절제술 등이 있다. 저자들은 상부 소화관 내시경검사를 시행하여 식도 과립상 세포종을 진단하고 내시경적 점막 절제술을 시행하여 합병증 없이 퇴원하여 현재 재발없이 경과 관찰중인 1례를 경험하였기에 보고하는 바이다. Granular cell tumors, which occur infrequently, are probably of Schwann cell origin. They can occur almost anywhere in the body but usually affect the tongue, oral cavity, skin, or breasts and are rarely found in the gastrointestinal tracts. The esophagus is the most frequent gastrointestinal site, followed by the stomach and the colon. Granular cell tumors are generally benign, especially in the gastrointestinal tract, some malignant lesions have been reported. For this reason, and also because preoperative diagnosis is difficult, the standard treatment for granular cell tumor has until now been surgical excision. In recent years, other therapeutic methods is endoscopic laser therapy (ELT), polypectiomy, endoscopic mucosal resection (EMR). We report a case of esophageal granular cell tumor which was diagnosed by an endoscopy and managed using an endoscopic mucosal resection without complication.
N 주개 리간드를 이용한 시스-디니트로실몰리브덴 착물(Ⅱ)의 합성과 특성에 관한 연구
김일출,김광음,도길명,최보용 慶南大學校 附設 基礎科學硏究所 1995 硏究論文集 Vol.7 No.-
The reactions of [(Mo(No)₂Cl₂)₂] with unidentate ligands in CH₂Cl₂ solvent afforded monomeric complexes [Mo(No)₂L₂Cl₂]. [Mo(No)₂L₄](CIO₄)₂ Was obtained by reaction of unidentate with [Mo(No)₂L₂Cl₂] in acetone solvent. 2.2'-bipyridine(bipy), 1.10-phenanthroline(phen), ρ-phentadine(ρ-phe), ο-toludine (ο-tol) were used as coordinating ligands. These dinitrosylmolybdenum complexes are prepared and characterized by elemental analysis, ¹H-NMR, Infrared, and UV-Visible spectroscopy. The infrared spectra indicate that the NO groups occupy cis-positions of the octahedral.
중학교 과학교육에서 천체운동의 개념형성학습에 관한 연구
김순,강용희,안병호,윤일희,정원우 慶北大學校 師範大學 科學敎育硏究所 1999 科學敎育硏究誌 Vol.23 No.-
We consider the effect of conceptual learning through exploratory activities concerning the concepts of motion of celestial bodies in the middle school science class. We are also trying to show an improved way of teaching for the effective conceptual learning. To measure the effect of conceptual learning, we prepared a questionnaire with 17 test items concerning basic concepts of motion of earth and planets. The test scores for the conceptual learning group was significantly higher than those of the conventional learning group. Educational implications of the planned conceptual learning through exploratory activities are discussed.
한국과 중국 중학 과학교과서 힘과 운동 단원 비교 분석
김규용,김일수 濟州大學校 師範大學 科學敎育硏究所 1999 科學敎育 Vol.16 No.-
This study is aimed to compare and analyze the systems or science education o Korea and China by the choice of the units "Force and Motion" in the Korean middle school textbook for the first grade and Chinese middle school textbook I. The results from the study are as follows; First, both countries have the same purposes of improving scientific technology and society. However, there is a remarkable difference that China should educate their children's ideology. Second, with regard to the unit, "Force and Motion". Korean unit has much more pages, graphics pictures, examples, and experiments, while Chinese unit has more pictures, photos experiments, questions for practice and reading materials. Therefore the contents of the Korean textbooks are much better structured, compared to Chinese textbooks. Finally, the units of "Force and Motion" by the theory of Romey were compared and analyzed. As a result, the contents and the evaluation of the chapter summaries have a tendency of authority. In contrast, the questions in the final section of the textbook and the activity index for inducement of students' exploration have remarkable tendency of exploration. In addition, with regard to the pictures and graphics, Korean textbooks have a tendency of exploration, while Chnese textbooks have a tendency of authority.
수용액상에서 Infrared Spectra를 이용한 HPDDA, MBDDA, BUDDPA의 특성에 관한 연구
김일출,김광음,도길명,최보영 慶南大學校 附設 基礎科學硏究所 1995 硏究論文集 Vol.7 No.-
Infrared Spectra of aqueous solution of HPDDA(Heptyldithiodiacetic acid), MBDDA(4-Methoxybenzmethyldithiodiacetic acid), and BUDDPA(Butyldithiodipropionic acid) are reported at various PH values. On the basis of the antisymmetric stretching bands of the ionized and un-ionized carboxyl group, the structures of the free-ligands are inferred. A approach to the study of these structures are compared with the results of potentiometric titration curve and IR Spectra studies.
척수 외상의 자기공명영상 및 신경학적 소견 : Delayed MR Image and Correlated Neurology
박용규,정진명,김은상,김재일,송해룡,한종우,신형진 대한신경외과학회 1992 Journal of Korean neurosurgical society Vol.21 No.11
19 patients with traumatic spinal cord injuries and associated neurological deficit were examined by delayed(> 1 month) magnetic resonance imaging(MRI), the result of which were correlated with neurologic and somatosensory evoked potential(SSEP) findings. 5 different MRI patterns were observed in these patients : (1) normal signal intensity(SI) on T1-and T2-weighted images(WI)(pattern N/N, n=6), (2) normal SI on T1-WI and high SI on T2-WI(pattern N/Hi, n=3). (3) low SI on T1-WI and high SI on T2-WI(pattern Lo/Hi, n=6), (4) syrinx(n=2), and (5) cord transection(n=2). The neurologic state was determined using Frankel's classification at admission and MRI time. Pattern N/Hi had best neurologic state except pattern N/N, and pattern Lo/Hi showed worst prognosis except pattern transection. SSEP findings relatively well correlated with neurologic findings, but did not exactly. The cause is probably that SSEP shows predominantly the function of ascending sensory systems of the cord, do not reveal motor pathways, directly or indirectly.