포르피린증 환자에서 보인 가역적 자기공명영상소견 1례

강석윤,마효일,곽규환,이상암 대한신경과학회 1998 대한신경과학회지 Vol.16 No.2

飼料資源開發을 위한 雜灌木樹葉의 飼料價値와 韓牛의 放牧利用에 關한 硏究

尹益錫,陸完芳,李仁德,曺圭燉,金炯基 건국대학교 1978 學術誌 Vol.22 No.1

As a part of forestry utilization for livestock feed resources the feeding value ague of shrub leaf by growth stage and grazing behabiour of the native cattle at shrubby grassland in function of seasons were investigated and the following results were obtained. 1. The crude protein content of oak leaf declined as the growth stage increased whereas the contents of crude fiber and crude fat showed the opposite tendency. 2. The intake of oak leaf paralleled with the amount given while the intake of the mixed grass leas remarkable increased and the body weight gain was also remarkably increased. 3. The average number of oak leaf intake was 70.5 times for spring, 148.7 for summer, and 395.7 for autumn. 4. The grazing time by the native cattle was decreased in the order of spring, autumn, and summer. As for the grazing behaviour, the intake activity was most active during morning, mid-day and late afternoon or three times a day. 5. The duration of rumination was found to be in the decreasing order or summer, autumn and spring, cattles ruminated more when the grasses were more abundant. 6. As for the inactive period of animal, it was short during spring when the animals spent more time for eating but it was about 5 times longer during both summer and autumn.

Co(ll)이온과 N₂O₂계 거대고리 리간드와의 착물형성에 관한 연구

최규성,성찬기,정윤숙 慶南大學校 附設 基礎科學硏究所 1989 硏究論文集 Vol.1 No.-

The protonation constants for the macrocyclic ligands containing nitrogen and oxygen donors such as 1, 12-diaza-3,4 : 9, 10-dibenzo-5, 8-dioxacyclopentadecane(NtnOenH₄), 1, 13-diaza -3,4 : 10, 11-dibenzo-5, 9-dioxacyclohexadecane( NtnOtnH₄) have been determined by potentiometric titration at 25℃. In order to obtain the enthalpy and entropy changes of complexation reaction of Co(II)ion with these ligands, the stability constants have been measured by uv-vis spectrophotometric method at 20~45℃. Protonation constants and stability constants have been found to be effected by the basicities of the macrocyclic ligands. The complexation reactions are exothermic and show the positive entropy changes. ?? studies showed that the stepwise additions of Co(II) ion the macrocyclic ligands of constant concentration induced spectral changes. The large chemical shifts of protons nearest aside the nitrogen were noticeable with the addition of Co(II) ion.

N₂O₂계 거대고리 리간드와 중금속 이온과의 착물형성에 관한 연구

최규성,김정,정윤숙 경남대학교 환경문제연구소 1989 환경연구 Vol.11 No.-

The protonation constants for the macrocyclic ligands containing nitrogen and oxygen donors such as 1,12-diaza-3, 4 : 9, 10-dibenzo-5, 8-dioxa-cyclopentadecane(NtnOenH₄), 1, 13-diaza-3, 4 : 10, 11-dibenzo-5, 9-dioxacyclohexadecane(HtnOtnH₄) have been determined by potentiometric titration at 25°C. In order to obtain the stability constants of complexation reactjon of Zn(Ⅱ), Cd(Ⅱ) ion with these ligands, half-wave potential have been measured by polarographic method at 25°C. Protonation constants and stability constants have been found to be effected by the basicities of the macrocyclic ligands and macrocyclic effect.

Si-Schottky障壁型의 大陽電池 製作에 관한 硏究

李相潤,羅炳旭,朴德圭,李鍾德,金奎用,玄東杰,禹洪,盧景錫 慶北大學校 物理化學硏究所 1981 硏究論文集 Vol.1-2 No.-

The characteristics of these Si-schottky barrier type and Heterojunction type solar cells are as follows; 1. SnO_2/n-Si Heterojunction Solar Cells Fabricated by Spray Pyrolysis Method SnO_2 film were deposited on the (100) or (111) surface of Si single crystal by the spray pyrolysis method. The best SnO_2/n-Si solar cell has a good performance, with an open-circult voltage: Voc.=0.45V, short circuit current: Isc.=35.5㎃, fill factor: FF.=0.64, and conversion efficiency: η=10.2% under 98㎽/㎠ irradiation of AMl. The spray pyrolysis described in this paper is simple and suitable for mass production. One possibility for cost reduction lies in this method of junction fabrication, and the idea of simply deposited SnO_2/n-Si junction is, at first sight, very attractive. Hence the SnO_2/n-Si Solar Cell and the effectiveness of this method may be of great value in some future production of low-cost solar cells. 2. In_2O_3: Sn Heterojunction Solar Cells Fabricated by Spray Pyrolitic Method Highly conductive and transparent thin films of In_2O_3: Sn (ITO) are fabricated by spray pyrolytic method. The parameters of these thin films are as follows: resistivity ρ = 1.5×10 exp (-3) Ω·㎝, carrier concentration n = 7.5×10 exp (19) cm^-3, mobility μ = 55.5 ㎠/V·sec and transmission 85-90% over visible and long wave-length region. These thin films have simple cubic system with lattice constant 10.2Å. In_2O_3: Sn/n-Si heterojunction solar cells are fabricated, depositing In_2O_3: Sn (ITO) thin films on n-Si substrates with orientation(100) and resistively 2-3Ω, ㎝ by spray pyrolitic method. Under AMl sunlight simulator, the parameters of the excellent cell obtained has open-circuit voltage Voc=0.52V, short-circuit current I_sc=39.0㎃, fill factor: F.F=0.60 and conversion efficiencyη=12.1%. 3. Al/p-Si MOS Solar Cells Fabricated by Vacuum Evaporation Method Al/p-Si MOS solar cells, consisting of Al on P-tupe silicon with a thin interfacial layer of SiO_2 have been found to have good light conversion efficiency for solar radiation. The effects of the oxide layer thickness between metal and substrate were investigated. Under AMl simulated sunlight illumination the best cell has open circuit voltage Voc=0.50V, short-circuit current I_sc=26.3㎃/㎠, fill-factor FF=0.70 and conversion efficiency η=9.2%. 4. Cr-Cu/P-Si MOS Solar Cells Fabricated by Vacuum Evaporation Method Cr-Cu/p-Si MOS Solar cells, consisting of Cr-Cu on p-type silicon with a thin interfacial layer of SiO_2 have been found to have good light conversion efficiency for solar radiation. The effects of the oxide layer thickness between metal and substrate were investigated. Under AMl simulated sunlight illumination the best cell has open circuit voltage Voc=0.49V, short-circuit current I_sc=26.4㎃, fill-factor: FF=0.72 and conversion efficiency η=9.3%.

키토산 미소구체가 약물방출에 미치는 영향

전윤,차월석,권규혁,이동병 조선대학교 생산기술연구소 2000 生産技術硏究 Vol.22 No.1

In this study, we examined about effectives of the drug release by used glutaraldehyde amount and molecular weight varieties of chitosan in DDS. The release experiments of chitosan microspheres containing norfloxacin were operated in the phosphate buffer solutions of pH 7.4 and 37℃, and its results were as follows. In the linearly release time of drug, chitosan microspheres (Mw 190,000) of used glutaraldehyde 1 mL and 2 mL were 45 and 64 days, and chitosan microspheres (Mw 350,000) of used glutaralhyde 1 mL and 2 mL were 60 and 80 days relatively. These results showed more effective drug releases in the increments of molecular weight and glutaraldehyde In short, the formulation allows chitosan microspheres to suppress the burst effect of the drug release mechanism, which led to the controlled release pattern and microspheres

한국 자귀나무 집단의 6-phosphogluconate dehydrogenase에 의한 다형현상

허만규,윤숙경,허홍욱 釜山大學校 師範大學 1994 교사교육연구 Vol.29 No.-

The objectives of the present report were to determine the levels of genetic diversity among the characteristics of Albizzia juribrissin and to examine the organization of genetic variation within the species and the patterns of genetic differentiation between populations. Starch gel electrophoresis was used to examine the allozyme variation of 6-PGDH. The frequency of slow allele for the 6-PGDH locus was 5.9% on the average (range ; 0.0-18.5). The highest (0.2210) and lowest (0.0234) distance values were exhibited by the population pairs Goseong-Nonsan and Changhung-Daejeon, respectively. The average heterozygosity varied between 0.000 in Kyongju population and 0.291 in Chilkok population.

水稻의 穗發芽性에 關한 硏究 (Ⅱ) 栽培時期 移動에 따른 穗發芽性

趙東三,孫錫龍,金鍾煥,尹太,朴成圭,權圭七 충북대학교 농업과학기술연구소 1988 農業科學硏究 Vol.6 No.1

This study was conducted in 1987 to investigate the viviparous germination in rice. Six varieties, i. e., Daeseongbyeo, Sangpungbyeo Hwaseongbyeo, Taebagbyeo, Chilseongbyeo and Samgangbyeo were used for this experiment. Seedlings were transplanted on May 25 and dune 5 and panicles were harvested 5 times with 5 days interval beginning 25 days after heading. Panicles were incubated at normal temperature right after harvest to observe the germination. Rate of viviparous germination of Japonica type was higher than that of Indica type. The early varieties such as Daeseongbyeo, showed high viviparous germination. Rate of viviparous germination of May 25 transplanting was higher than that of June 5 transplanting. Viviparous germination rate of Japonica type appeared to be increased as the harvesting was postponed. On the other hand, Indica type didn't show viviparous germinate. Based on this study the optimum harvesting time of tested varieties appeared to be between 40 to 45 days after heading.

분절 광배근 유리피판의 유용성

이훈범,김석원,정윤규,박윤규 大韓成形外科學會 1999 Archives of Plastic Surgery Vol.26 No.5

Since the first report by Tansini in 1896, the latissimus dorsi muscle free flap has been widely used for various types of soft tissue defect due to reliable anatomy with a sufficient diameter of neurovascular pedicle and a sizable muscle. However, for relatively small soft tissue defect, latissimus dorsi free flap offers several distinct disadvantages of donor site including loss of the posterior axillary fold and flattening of the posterolateral chest wall, weakness of upper arm strength in extension, adduction and internal rotation. We treated three patients having various types of soft tissue defect using segmental latissimus dorsi muscular free flap depending on its descending branch of thoracodorsal neurovascular pedicles. There were no serious complications during 18 months of mean follow-up. We concluded that this method has some advantages such as no weakness of strength of the upper arm including walking on crutches, preserving the posterior axillary fold, preventing winging of the scapula and increased chance of using a flow-through technique. Here we present our cases of reconstruction of soft tissue defect using segmental latissimus dorsi free flap with a review of the literature.

일차성, 이차성 그리고 삼차성 부갑상선 기능 항진증 환자의 수술 후 임상결과: 서울대학교 병원에서의 14년 경험

최윤석 ( Yun Suk Choi ),이규언 ( Kyu Eun Lee ),박귀원 ( Kwi Won Park ),노동영 ( Dong Young Noh ),오은미 ( Eun Mee Oh ),최준영 ( June Young Choi ),윤여규 ( Yeo Kyu Youn ),오승근 ( Seung Keun Oh ),구도훈 ( Do Hoon Koo ) 대한임상종양학회 2011 Korean Journal of Clinical Oncology Vol.7 No.1

목적: 일차성, 이차성, 삼차성 부갑상선 기능 항진증은 각각 원인과 치료방법 그리고 임상 경과가 서로 다르지만 부갑상선 절제술이 표준치료로 알려져 있다. 본 연구에서는 각각의 부갑상선 항진증의 수술 전후의 임상적 변화를 알아보고 부갑상선 절제술의 의미를 재고 해보고자 하였다. 방법: 1996년부터 2009년까지 총 126명이 서울대학교 병원에서 부갑상선 절제술을 시행 받았으며 각각 일차성 96명, 이차성 24명, 삼차성 6명이었다. 환자들의 나이, 성별, 생화학적 검사, 수술방법, 병리학적 검사 결과를 전자 의무기록을 통해 후향적으로 분석하였다. 결과: 모든 세 군의 환자에서 혈청 칼슘, 부갑상선 호르몬, 이온화 칼슘이 수술 전보다 호전을 보였다. 이차성 환자군은 다른 두 군에 비해 수술 전, 후의 부갑상선 호르몬이 높았으며(p<0.001, p=0.036), 수술 후 지속적인 부갑상선 기능 항진증(30.4%) 및 일과성 저칼슘혈증(87.5%)도 다른 두 군에 비해 많이 발생하였다.(p< 0.001) 일과성 저칼슘혈증의 대부분(90.4%) 은 6개월 이내 회복 되었다. 이차성 환자에서 부갑상선 아전 및 전 절제술을 시행 받은 경우 수술 후 일과성 저칼슘혈증이 많이 나타났으나(71.4%), 제한적 절제술을 시행 받은 경우 지속적 부갑상선 기능항진증이 더 많이 나타났다.(50%) 결론: 부갑상선 절제술은 생화학 검사상의 호전을 위한 치료 방법으로 추천될 수 있으며, 이차성에서는 제한적 절제를 하는 경우 지속적 부갑상선 항진증의 빈도가 더 높으므로 부갑상선 아전 및 전 절제술을 시행해야 한다. Purpose: Primary hyperparathyroidism(PHPT), secondary hyperparathyroidism(SHPT) and tertiary hyperparathyroidism(THPT) are different in the cause, treatment and prognosis. However the parathyroidectomy has been an efficient treatment in all hyperparathyroidism groups. A single institution`s 14 year experience of surgical treatment was analyzed to investigate perioperative changes of clinical characteristics and reconsider the value of parathyroidectomy as the treatment option. Materials and Methods: From 1996 to 2009, 126 patients underwent parathyroidectomy at single institute and the number of patients with PHPT, SHPT and THPT were 96, 24 and 6 retrospectively. The electronic medical records of age, sex, biochemical analysis, operative method, and pathologic results were reviewed retrospectively. Results: Postoperative calcium (Ca), parathyroid hormone (PTH), ionized calcium (iCa) levels were improved definitely than preoperative Ca, PTH, iCa level in all three groups. Pre and postoperative PTH level in SHPT was higher than in PHPT and THPT(p<0.001, p=0.036) and postoperative persistent PTH increased status were more common in SHPT.(30.4%, p<0.001) Postoperative temporary hypocalcemia was more common in SHPT(87.5%, p<0.001), almost of them (90.4%) were recovered in 6 month. In SHPT group, temporary hypocalcemia were more common in subtotal or total parathyroidectomy group than in limited resection group (94.1%) but persistent iPTH increase were more common in limited resection group (50%). . Conclusion: Parathyroidectomy is highly recommended to improve biochemical laboratory findings in patients with hyperparathyroidism. And in SHPT, subtotal or total parathyroidectomy is more appropriate surgical method for reducing the high incidence of persistent hyperparathyroidism.