http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Tubulin Polymerization에 대한 Microtubule Associated DNA Binding Protein 의 영향
박희찬,권기량,황병두 충남대학교 의과대학 지역사회의학연구소 1989 충남의대잡지 Vol.16 No.2
Although the involvement of tubulin in the segregation of chromosome during mitosis is well established, the role of DNA binding protein(DBP) in tubulin polymerization is unclear. When the microtubule was prepared from rabbit brain through 2 cycle of glycerol-and GTP-mediated polymerization, the preparation(MADBP^+) was found to have serveral DBP. These DBP were separated from tubulin using double strand DNA cellulose column chromatography and the proper-ties of this tubulin polymerizatin could be inhibited by DNA whereas MADBP^- polymerization could not. Addition of microtubule associated DNA binding protein(MADBP) to MADBP^- could change MA-DBP^- polymerization kinetics; some MADBP fractions decreased the initiation and increased the elongation, some fractions simply increased the polymerization. From the above results, the possible roles of MADBP and possible binding site of taxol were discussed.
有機色素(Pyronine G)의 Metachromasy에 關한 鹽效果의 吸收分光學的 硏究
朴鍾會,金一斗,宋基東 조선대학교 기초과학연구소 1986 自然科學硏究 Vol.9 No.1
The metachromatic behavior of organic dye(pyronine G) in the presence of various salt was investigated by means of absorption spectroscopy. The salts examined for the addition effect were LiCl, NaCl, KCl, NH_4Cl and (CH_3)_4 NCl. A remarkable increase in pyronine G aggregation with on increase in the salts concentration was observed. This phenomenon has been explained by the activity of counter ions from the salts which presumably reduce the repulsive force between the cationic dye molecules. But in this study the degree of aggregation differed with addition of various salts and this Is ascribed not only to the contribution of counter ions but aIso to the cations from the salt. The different changes in pyronine G aggregation are also discussed in term of the effect of the structure of water.
朴鍾會,申大鉉,金演斗,尹錫丞,尹和重,申敏雄 충남대학교 기초과학연구소 1980 연구논문집 Vol.1 No.-
Dimerization constants for acridine orange and methylene blue in aqueous solutions have been determined by absorption spectroscopic method and also the empirical absorption curves of their monomeric and dimeric states are presented. The theories of hypochromism developed by Tinoco and Rhodes using first order perturbation theory and by DeVoe using a purely classical treatment have been modified and applied to the dimeric systems of the above compounds and the theoretical spectra of dimers are computed at various structure determining factors. By making comparison of the computed theoretical spectra with the empirical ones the configurations and the dimensions of the dimeric system of both compounds are determined, and the results are found to be reasonable, i.e., the intermolecular distance is 7.5Å and the angle of twist between the molecular planes is about 25°in both cases.
국산 티타늄철광으로부터 이산화티타늄의 제조에 관한 연구
朴鍾會,金演斗,朴茂淳 충남대학교 자연과학연구소 1975 學術硏究誌 Vol.2 No.1
It has been observed that Titanium(Ⅳ) is not precipitated in the presence of hydrogen peroxide in ammonia water, while Iron(Ⅲ) and Aluminum(Ⅲ) are precipitated as hydrated oxide. Thus it is shown that the quantitative separation of Titanium(Ⅳ) from Iron(Ⅲ) and Aluminum(Ⅲ) in Ilmenite solution is possible by using ammoniacal hydrogen peroxide. However in case of the presence of a large amount of Iron(Ⅲ), it is necessary to eliminate most of the Iron(Ⅲ) in 10N hydrochloric acid solution by extraction with Amberlite LA-1-xylene mixture prior to the conversion of the acid solution to alkali solution. Upon heating the solution, due to the dissociation of hydrogen peroxide, it is easy to obtain Titanium hydroxide which directly gives Titanium dioxide by ignition for an hour at 900~1,000℃. According to the above method of preparation, production of Titanium dioxide from the Ilmenite ores is yielded about 81%.
흉쇄관절 전방 탈구에서 세 가지 재건술식에 따른 전방전위 비교
김두섭(Doo-Sup Kim),정회정(Hoe-Jeong Chung),박일환(Il-Hwan Park),신지수(Ji-Su Shin),이준표(Jun-Pyo Lee),장영환(Young-Hwan Jang) 대한정형외과학회 2017 대한정형외과학회지 Vol.52 No.2
목적: 흉쇄관절의 안정성 유지에 중요한 역할을 하는 전방구조물 재건술 간의 생역학 및 기능적 비교 분석은 많지 않다. 이에 저자는 사체에서 대표적인 세 가지 재건술 시행 후 흉쇄관절의 전방전위를 측정하여, 기능적인 면을 확인하고자 하였다. 대상 및 방법: 24개의 흉쇄관절 사체를 대상으로 하였다. 세 개의 그룹으로 나누어 햄스트링건 팔자 재건술(Group 1), 쇄골하근건 재건술(Group 2), 햄스트링건 걸이 재건술(Group 3)을 시행한 후, 그룹 간 전방전위를 위팔어깨관절을 0도에서 90도까지 10도 단위로 증가시키며 측정을 시행하였다. 결과: 세 가지 재건술식 모두 흉골 대비 쇄골의 상승이 유의하게 관찰되었다. Group 1 평균 1.68±0.25 mm, Group 2 평균 1.81±0.23 mm, Gorup 3 평균 2.8±0.58 mm의 전방전위가 관찰되었다(Group 1: p=0.004, Group 2: p=0.001, Group 3: p=0.002). Group 1은 60도부터, Group 2는 50도부터, Group 3은 20도부터 유의한 전방상승이 관찰되었다. 결론: 대표적인 세 가지의 흉쇄관절 재건술을 사체 실험에서 평가한 바 Group 1이 정상 흉쇄관절의 전방전위와 가장 유사한 결과를 보였다. Purpose: Currently, biomechanics and function comparison of the reconstruction of structures play important roles in the sternoclavicular joint stability is not much. In order to confirm the improvement in the functional aspects of the sternoclavicular joint after the three most widely used reconstruction methods, we measured the degree of anterior translation of the sternoclavicular joint after the operation using cadavers. Materials and Methods: We studied 24 sternoclavicular joints in the cadavers. First, we measured the anterior translation of the clavicle, which was compared with the sternum in 24 normal sternoclavicular joints. We divided the cadaver into three groups and performed each of the three current operations: figure of eight hamastring tendon reconstruction operation (Group 1), subclavius tendon reconstruction operation (Group 2), and hamstring tendon reconstruction operation (Group 3); then we compared the degree of anterior translation in each group. We did the measurement by adding 10 degrees to the glenohumeral joint each time from 0 degrees to 90 degrees. Results: In the normal joint, the clavicle was significantly ascended compared with the sternum. The Group 1 had a 1.68±0.25 mm anterior translation while the Group 2 had 1.81±0.23 mm and Group 3 had 2.8±0.58 mm (Group 1: p=0.004, Group 2: p=0.001, Group 3: p=0.002). The Group 1 showed a low ascending rate of up to 60 degrees, which showed no significant difference with that of the normal joint. However, after 60 degrees, the ascending rate showed a significant increase. In the case of Group 2, there was no significant difference with normal joint of up to 50 degrees. Group 3 showed significant anterior ascending from 20 degree. Conclusion: Through measuring the anterior translation of subjects that underwent three representative sternoclavicular joint reconstructions, we found that the result from the Group 1 was most comparable normal translation of the sternoclavicular joint.
Ki Cheol Park,권동락,Min Young Kim,Hak Il Lee,Doo Hoe Ha,Tae Sun Hwang 대한재활의학회 2011 Annals of Rehabilitation Medicine Vol.35 No.2
Objective To investigate the reference value for cross sectional area (CSA) of the fibular nerve in Koreans. Method One musculoskeletal radiologist and one physiatrist performed fibular nerve ultrasonography (US) on 60 lower extremities of 30 asymptomatic Korean volunteers (16 males, 14 females). The mean age was 46.6 years (range: 21-75 years). We measured CSA of the fibular nerve at three sites: proximal portion (PP) at the bifurcation, mid-portion (MP), and an area just above the fibular head (FH). In addition, the fibular nerves of 7 lower extremities from 4 cadavers were cut from the fibular head to the proximal portion and divided into three sections (PP, MP, FH). They were subsequently fixed with 10% neutral buffered formalin and perpendicularly excised to 2 mm thickness. They were photographed by an operating microscope and CSA was measured. Using the Kruskal-Wallis test, measurements obtained from US images were compared between asymptomatic volunteers with a significance level of 0.05. Results In asymptomatic volunteers, the CSA of the three portions were PP: 13.8±1.2 mm2, MP: 11.1±1.0 mm2, FH: 10.9±0.6 mm2. The fibular nerves were well visualized with clear borders by US. In cadavers, the CSA of three portions were PP: 20.3±10.3 mm2, MP: 16.7±8.6 mm2, FH: 14.4±8.9 mm2. There was no significant difference between the three portions in asymptomatic volunteers and cadavers (p>0.05). Conclusion In normal Korean adults, the area of fibular nerve at the fibular head is 10.9±0.6 mm2. Ultrasonographic evaluation of the fibular nerve can be helpful in diagnosing fibular nerve lesions.