수용액에서 〔Co(en)_3〕Cl_3 및 〔Co(NH_3)_6〕Cl_3 착물의 이온 해리에 미치는 압력의 영향

鄭倧在,盧炳吉 慶北大學校 物理化學硏究所 1986 硏究論文集 Vol.7 No.-

25℃에서 〔Co(en)_3〕Cl_3, 〔Co(NH_3)_6〕Cl_3 수용액의 열역학적 해리상수를 1∼2000bar의 압력범위에서 전도도법으로 측정하였다. 착물이 해리할 때 하전을 띤 이온이 생성하여 부피가 감소하므로 압력이 증가함에 따라 해리상수(K^T)는 커졌다. 즉 〔Co(en)_3〕Cl_3에 대한 _pK^T값은 1bar에서 2.16, 500bar에서 2.08, 1000bar에서 2.08, 1500bar에서 2.05, 2000bar에서는 2.03이었고, Co(NH_3)_6〕Cl_3의 _pK^T는 1bar에서 2.02, 500bar에서 1.96, 1000bar에서 1.90, 1500bar에서 1.88, 2000bar에서는 1.87이었다. 각 압력에서 Stokes반경과 해리상수(K_T)값을 비교 분석하여 착물의 이온쌍 형성에는 정전기적 인력 이외에 Internal Conjugate Base(ICB) 효과도 영향을 미쳤으며 이 효과는 압력이 증가할 수록 커졌다. The thermodynamic dissociation constants of 〔Co(en)_3〕Cl_3 and 〔Co(NH_3)_6〕Cl_3 in aqueous solutions at 25℃ and at the pressure from 1 bar to 2000 bars were measured by conductometric method. The dissociation constants were increased with pressure elevation because of volume decreasing by the formation of charged ions during dissociation reaction. That is, the _pK^T values of 〔Co(en)_3〕Cl_3 were 2.16 for 1 bar, 2.08 for 500 bars, 2,08 for 1000 bars, 2.05 for 1500 bars and 2.03 for 2000 bars, respectively and those of 〔Co(NH_3)_6〕Cl_3 were 2.02 for 1 bar, 1.96 for 500 bars, 1.90 for 1000 bars, 1.88 for 1500 bars and 1.87 for 2000 bars, respectively. Comparing and analyzing the values of Stokes' radii and K^T, the formation of ion pair compound was affected by not only the electrostatic interaction, but also the Internal Conjugate Base(ICB), which was incresed by the elevation of the pressure.

春季 錦江下流域의 水質 및 Diatom의 組成變化에 關하여

金榮吉,金鍾培 군산대학교 1978 群山水産專門大學 硏究報告 Vol.12 No.2

The monthly observation on the composition quantity of Diatoms and chemical contents was done at 7 stations in the below stream area of Gum River from April to June, 1978. The total numbers of Diatom appeared by observation were 27 species ; neritic planktons(27), and oceanic planktons(2) and the composition organism of total diatoms was 1,600Cells/ℓ∼41,700Cells/ℓ. The surface water temperature is 6.8∼20.8℃ at St. 3, 13.4∼23. 6℃ at St. 7 and the difference between two stations, was 3.3∼6.6℃, when, the temperature at St. 5∼7 was higher than 1∼4. Transparency was 3.2m at St. 7, 11m at St, 3 and salinity was 29, 9∼32.2% at St. 1∼4, 28.4∼29.7% at 5∼7. The surface water of dissolved oxygen content was 5. 3∼6.2cc/ℓ, and bottom water was 5.3∼5.9cc/ℓ. The content of C.O. D was 0.49∼1.2ppm and it was higher in April than it was in May and June. In case of NO2-N, the surface water was 0.3∼0.6㎍- at/ℓ, bottom water was 0.3∼0.6㎍- at/ℓ, and it's contents was the highest in June. The contents of PO4- P was 0.03∼0.0㎍- at/ℓ, SiO2 was 5.9∼10.1㎍- at/ℓ and Ammonia-N was 0.8∼1.6㎍ at/ℓ.

자연지반에서의 주입조건의 영향에 대한 실험적 연구

최항길,백종화 대불대학교 2003 大佛大學校大學院 硏究論文集 Vol.2 No.1

It necessary to determine the suitable grouting conditions in order to design ideal ground water control for tunnel excavation. In order to determine ideal grouting conditions, one muse study how different variables such as grouting condition and ground depth affect of four difference variables-overburden pressure, gel time, injection rate, and relative density. The results presented in this study were drawn from 320 laboratory trials, which included repetitions to ensure accuracy. Both the height and dismeter of the test specimens were held constant at 30cm. The following is a specific explantion of the variables used in this experiment: overburden pressure(49~245KN/㎡); gel time, either short(5 seconds) or long (300 seconds); injection rate (500, 1000, 1500, 2000 cc/min); and relative density, either loose (35%) or dense (70%). The results of this experiment indicate that fracturing tends to occur when the gel time is short and the injection rate is relatively slow. However, permeation grouting tends to occur when the gel time is long, irrespective of other variables. The long time grouts tends to be nearly spherical and obtain the desired results. when the injection rate is low for short gel time grouts, hydraulic fracturing tended to occur. however, through these experiments, we demonstrated that it is possible to almost obtain a permeation pattern mass(irrespective of gel time) at more than 20m ground depth. But the mass shrinkage is about 25%.

LED 전광판 제어 ASIC의 설계

남상길,조경연,이수범,김종진 釜慶大學校 1997 釜慶大學校 論文集 Vol.2 No.2

The wide spread of multimedia system demands a wide viewing angle display device which can imform a message to many peoples in open area. This paper is about the design and simulating of a large viewing LED pannel control ASIC(Application Specific Integrated Circuit). This LED pannel control ASIC runs on 16bit micropricessor MC68EC000 and has following functions : 16 line interlaced LED pannel contriller, memory controller, 16 channel priority interrupt cotroller, 2 channel direct memory access controller, 2 channel 12 bit clcok and timer, 2channel infrared remocon receiver, 2 channel RS-23C with 16 byte FIFO, IBMPC/AT compatible keyboard interface, battery battery backuped real time clock and timer,2controller, battery backuped 256 byte SRAM and watch dog timer. The 0.6 micronCMOS Sea of Gate is used to desing the ASIC in amiunt of about 39,000 gates,and it is simulated at 48MHz

防潮堤의 壓密沈下量 解析에 관한 考察

安鍾弼,朴吉鉉,金永先 조선대학교 국토개발연구소 1988 국토개발연구 Vol.8 No.1

In Seadyke design a surface stress Calculation using osterberg chart for few point has been generally used to settlement quantity Computation. This study is developed to the Computer Program of integral formula having a Zonal triangular load, A few Case studies are examinedand find out degree of error about the Cross section. This results can be use to the seadyke design.

Carcinoembryonic Antigen (CEA) 陽性 胃腺癌細胞에 對한 免疫組織化學的 및 免疫細胞化學的 硏究

鄭琮吉,鄭相愚,曺圭赫 全南大醫大 1984 전남의대학술지 Vol.21 No.3

西海 沿岸의 養殖場 環境 調査 : 2. 高亭理 海域 김養殖場의 水質環境

金容浩,金榮吉,李廷烈,金鍾連 군산대학교 1990 群山水産專門大學 硏究報告 Vol.24 No.1

To understand the effects of oceanographic condition on the harvest of laver and establish the basic environmental data for cultivation farm of laver, a series of survey was carried out in Gojeong-ri sea area, west coast of Korea from January to September, 1987. Variation of water temperature in Gojeong-ri sea area was 3.8-25.8℃, pH was 7.8-8.4, and transparency was 1.3-3.1m. Salinity was changed from 19.57 to 31.99% and lower remarkably in July and August owing to a heavy rain. The concentration of DO in surface water wart varied from 9.4-10.1㎎/ℓ and in lower layer was 8.0-9.99㎎/ℓ . COD was 0-4.28㎎/ℓ by alkalic modification of potassium permanganate method. Distribution of total suspended solid was 13.7-488.7㎎/ℓ and the rate of light penetration in 1m water column was 7.2-15.5%. The concentration of nutrients were changed in 0.48-23.63㎍-at./ℓ for ammonia nitrogen, 0-4.45㎍-at./ℓ for nitrite nitrogen, 0.39-3.13㎍-at./ℓ for nitrate nitrogen, 0-21.42㎍-at./ℓ for phosphate, and 0.84-157.32㎍-at./ℓ for silicate. It was showed high concentration in summertime, raining season in general. The concentration of chlorophyll a was 0.39-20.62㎎/㎥. Total 57 species of phytoplankton and 21 groups of zooplankton were identified from collected samples. Dominant species were Coscinodiscus radiatus, Eucampia zodiacus as a phytoplankton and Noctiluca scinitillans, Cladocera, Copepods sp. as a zooplankton. The total standing crop of phytoplankton was ranged of 5,500-1,524,400cells/ℓ and that of zooplankton was 3,000-43,000 individuals/㎥.

데오드라이트 시스템의 측정 정확도에 대한 연구(Ⅱ) : 기준자 측정 높이에 따른 측정 정확도 A Measurement Accuracy for a Height of Scale Bar

윤용식,이동주,정종길 한국공작기계학회 2004 한국생산제조학회지 Vol.13 No.4

A measurement accuracy of theodolite system may be affected by a measurement environment, a measurement distance change and so on. This study was performed for measuring an accuracy when the height of scale bar is changed 0.05m, 0.5m, 1m and 1.5m under the distance 3m between two theodolites, the distance 4m from the theodolite system to scale bar and the distance 5m from the thodolite system to the horizontal target bar. And we could know that the best height is 0.05m and 1m.

아질산 노출이 이스라엘잉어 혈장내 아질산 농도 및 간장 약물대사효소에 미치는 영향

박관하,최상훈,김영길,김용호,최선남,김종배 한국환경독성학회 2003 환경독성보건학회지 Vol.18 No.2

Effects of ambient nitrite, N0₂^(-), at 1, 3, 10 and 30 mg/l, on the changes of plasma nitrite/nitrate and on hepatic drug-metabolizing enzyme activity were examined in the juvenile Israeli carp, Cyprinus carpio. When the fish were exposed to 1 and 3 mg/l N0₂^(-), there was an exposure duration-dependent increase in plasma N0₂- over the 96-hr period reaching 6~7 fold excess the ambient concentration, In the fish exposed to 10 mg/l, a plateau concentration of less than 2-fold of the environment was attained in 12 hr. With 30 mg/l, however, the maximal plasma NOf was 41.25 mg/1 at 12 hr followed by a gradual decline. There was a concentration increase in methemoglobin (metHb) level in all N02^(-)-exposed groups and a significant decrease in hematocrit value in 30 mg/l group after 96-hr exposure. Apart from the blunted increase in plasma N0₂^(-) with higher N0₂^(-)(10 and 30 mg/1) exposure, the ratio of plasma N0₃^(-) to N0₂^(-) was significantly higher in these groups compared to 1 and 3 mg/l. The imbalance in the plasma N0₃^(-)/N0₂^(-) at higher N0₂^(-) exposure suggests a possible accelerated conversion of N0₂^(-) to N0₃^(-). Nitrite exposure did not affect the hepatic drug-metabolic activities in juvenile Israeli carp. All these data indicate that disposition of N0₂- differ depending upon exposed concentration and that metHb production may not be the exclusive toxic mechanism in carp

전신마취유도 중 발생한 심방세동과 회복중 발생한 발작성 상심실성 빈맥

방윤식,신동욱,이태규,박정현,길현주,이종연 이화여자대학교 의과학연구소 2012 EMJ (Ewha medical journal) Vol.35 No.2

A healthy 35-year-old man who was scheduled for closed reduction of nasal bone fracture developed atrial fibrillation during induction of general anesthesia after intravenous glycopyrrolate injection. During emergence of general anesthesia, atrial fibrillation was suddenly changed to paroxysmal supraventricular tachycardia with 200 beat per minute and lasted for about 10 seconds. Because blood pressure was stable, esmolol was used to reduce ventricular response. At recovery room, ventricular response reduction about 55 beat per minute was observed after intravenous injection of verapamil 5 mg. Thereafter, the rhythm was returned to normal sinus rhythm with bradycardia.