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朴茂淳,孫炳贊,金演斗 순천향의과대학 1978 Journal of Soonchunhyang Medical Science Vol.1 No.1
It has been observed that Pt(IV) in Hydrochloric acid solution, when treated with Tin(II) chloride give a orange color and the color that is due to chloroplatin-ous acid, is stable reproducible and quantitative. Thus it is possible to determine platinum by use of spectrophotometer. This method saves time in determination of Pt and is applied to estimation of small amounts of Pt in its ores and alloys.
Eethyl benezylidencyanoacetate 유도체에 대한 thiophenol 첨가 반응의 속도론적 연구
朴茂淳,金文執,崔元植,黃善岩,孟柱煬 순천향대학교 1991 논문집 Vol.14 No.1
Reaction of benzaldehyde derivatives with ethylacetate afforded ethylbenzylidenecyanoacetate. Especially, the crystal structure of ethyl p-methoxybenzylidenecyanoacetate were demonstrated by X-ray diffrection method. The crystal structure is only exist in E-form. The kinetic studies on the mechanism of nucleophilic addition of thiophenol to ethyl benzylidenecyanoacetate have been investigated by UV-spectrophotomery and the rate equation which can be applied over wide pH range was obtained. From the rate equation, effect of generalbase and substituent, the fellowing reaction proposed. Below pH 3.0, thiophenol added to the double bond, while above pH9.0 thiophenoxide ion added to the double bond. In the range of pH from 3.0 to 9.0, these reaction occurred competitively.
顎關節障碍患者에 있어서 下顎顆頭의 骨變化樣狀에 關한 放射線學的 硏究
朴茂洵,劉東洙 大韓口腔顎顔面 放射線學會 1989 Imaging Science in Dentistry Vol.19 No.1
The author has studied radiographic bony changes of mandibular condyle head in temporomandibular disorder patients using Oblique lateral transcranial projection, Orthopantomogrphy, and Tomography. The bony change types and the frequencies of occurrence and the incidences of bony changes in three different radiographic techniques were examined. The coincidences of bony change types between the Oblique lateral transcranial projection and the lateral part of Tomogram, the Orthopantomogram and the medial part of Tomogram were also examined. The results were as follows: 1. The mean age of patients was 31.7 years and under 40 years were 24 patients, women were 27 patients, men were 4 patients. 2. The observable cases of bony changes in all three radiographic techniques were 19 cases (50%) of 38 cases and the observable cases of bony changes in only Tomography were 5 cases (13.2%). 3. The most frequent radiographic bony change type was osteophyte and next orders were flattening, erosion, concavity. 4. The positional incidences of bony change in Tomogram were 31 cases in lateral part and 27 cases in central part. 5. The coincidence of bony change types between the Oblique lateral transcranial projection and the lateral part of Tomogram was 80%, and the coincidence between the Orthopantomogram and the medial part of Tomogram was 76.9%.
W-Thiocyanate Complex의 抽出에 있어서 Amberlite LA₁의 利用
朴茂淳,孫炳贊 순천향의과대학 1979 Journal of Soonchunhyang Medical Science Vol.2 No.1
Comparision studies onthe extraction of Tungsten thiocyanate complex have been carried out using several pure organic solvents and 0.1% Amberlite LA₁solvents diluted with each solvent. The latter solvents show more advantages not only on extractability but also on linearity for the spectrophotometric determination of the complex than the former cases.
trans-Dinitrogen bis-1,2-bis(Diphenylphosphino) Ethane Molybdenum(O)을 촉매로 Olefin에의 수소전이에 있어서 용매효과
박무순 순천향대학교 1989 논문집 Vol.12 No.2
Hydrogen transfer from organic compounds to olefins, which is called transfer hydrogenation, was studied to find effective homogeneous catalysts and it was found that trans-Mo(N₂)₂(DPPE)₂[DPPE = Ph₂PCH₂CH₂PPh₂] had the highest catalytic activity among the zerovalent complexes which were tried. This paper reports on investigation of the hydrogen donating ability of various organic compounds catalyzed by trans-Mo(N₂)₂(DPPE)₂. The most effective hydrogen donor is found to be 2-propanol among the organic compound examined. In the hydrogen transfer reaction of 2-propanol-tetrahydrofuran systems, the yield of hydrogenation product is remarkably incleased.