• 분석과학
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• 제17권3호
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• pp.278-281
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• 2004

The separation and concentration method of gold(III) and platium(IV) ions from other ions has been investigated using chelate resin, Amberlite IRC 718 in the mixed solution. The adsorption and desorption capacity of ions on the chelate resin in mixed solution were measured at room temperature. Using the data, gold(III) and platium(IV) ions were separated and concentrated in the ions solution.

• Nuclear Engineering and Technology
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• 제43권6호
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• pp.547-556
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• 2011

Two computational methods for determining equilibrium states for the Mark-IV electrorefiner (ER) have been assessed to improve the current computational electrorefiner model developed at University of Idaho. Both methods were validated against measured data to better understand their effects on the calculation of the equilibrium compositions in the ER. In addition, a sensitivity study was performed on the effect of specific unknown activity coefficients-including sodium in molten cadmium, zirconium in molten cadmium, and sodium chloride in molten LiCl-KCl. Both computational methods produced identical results, which stayed within the 95% confidence interval of the experimental data. Furthermore, sensitivity to unavailable activity coefficients was found to be low (a change in concentration of less than 3 ppm).

• Bulletin of the Korean Chemical Society
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• 제10권3호
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• pp.270-272
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• 1989

The polymeric species formed on the hydrolysis of Th(IV) from solubility experiments of $ThO_2$ in 0.1M $NaClO_4$ and $Th(OH)_4\;in\;0.5M\;NaClO_4$ were removed by ultrafiltration using 1 nm ultrafilters. The resultant equilibrium concentrations of mono-hydroxy Th(IV) species in solutions between pH 1.5 to 13 were measured by the NAA method. From these data solubility product of thorium dioxide and the stability constants of mono-hydroxy Th(Ⅳ) were determined. The values obtained were log $K_{sp}\;-\;50.76\;{\pm}\;0.08, log\;{\beta}_{1,1}\;12.42\;{\pm}\;0.02,\;log\;{\beta}_{1,2}\;22.46\;{\pm}\;0.15, log\;{\beta}_{1,3}\;34.36\;{\pm}\;0.07,\;log\;{\beta}_{1,4}\;42.58\;{\pm}\;0.08$, which are in good agreement with the values given in the literature. In addition, several dimeric species, $Th_2(OH)_2\;^{6+},\;Th_2(OH)_3\;^{5+} and\;Th_2(OH)_4\;^{4+}$ have been identified.

• 성인간호학회지
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• 제15권2호
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• pp.183-192
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• 2003

Purpose: This study was performed to validate the linkage between nursing diagnoses and nursing interventions by identifying performance and importance of nursing interventions linked to five NANDA nursing diagnoses. Method: Data was collected from 153 staff and head nurses working in 4 hospitals in K city. The results were analyzed using mean, SD and spearman correlation for ranking correlation. Result: The most importantly considered interventions were Medication Administration (IV) for pain, Pain Management for Constipation, Intravenous (IV) Insertion for Diarrhea, treatment, Vital Sign Monitoring for Hyperthermia, and Vital Sign Monitoring for Infection risk. The most frequently performed interventions was Medication Administration (IV) for Pain, Fluid Management for Constipation, Intravenous (IV) Insertion for Diarrhea, Vital Sign Monitoring for Hyperthermia, and Vital Sign Monitoring for Infection: Risk for. The rank correlations between importance and performance were highest in Diarrhea and lowest in Constipation. Conclusion: The above findings can be used to develop a nursing information system which can be used to facilitate documenting the nursing process, and a nursing information system developed by this research process will ultimately contribute to identifying nurses contribution to patient health.

• 한국식물병리학회지
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• 제11권3호
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• pp.278-281
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• 1995

An isolate of Rhizoctonia solani AG 2-2(IV) from zoysiagrass was examined on development of its teleomorph by the modified soil-on-agar culture method. The most effective growth medium for sporulation was Czapek's 1/2 agar medium added with yeast extract and peptone. The characters of teleomorph of R. solani AG 2-2 (IV) are as follows. Hymenia developed on soil surface after the development of vegetative hyphae. Basidia were barrel-shaped, short clavate or obovate and were 11.4~17.9$\times$7.1~11.4 ${\mu}{\textrm}{m}$ (mean : 15.1$\times$9.0 ${\mu}{\textrm}{m}$) in size. Sterigmata were horn-shaped and slightly bent to the inner side and 4.3~18.6 ${\mu}{\textrm}{m}$ (mean : 10.3 ${\mu}{\textrm}{m}$) in size. Two to four sterigmata developed on each basidium. Basidiospores were obovate, ellipsoid to oblong-ellipsoid, hyaline, smooth, thin walled, with an apiculus, and 3.6~10.4$\times$2.9~5.7 ${\mu}{\textrm}{m}$ (mean : 7.8$\times$4.4 ${\mu}{\textrm}{m}$) in size.

• 한국멀티미디어학회논문지
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• 제20권3호
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• pp.482-490
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• 2017

Early detection of infiltration is one of the most important tasks of nurses to minimize skin damage due to infiltration. For subjects receiving invasive intravenous treatment, the bioelectrical impedance (impedance) were measured in the frequency range of 5 to 500 kHz using bioelectrical impedance spectroscopy (BIS). After attaching electrodes at both ends of a transparent dressing mounted on the skin in which IV solution was infused into the vein, the change in impedance was measured as a function of time and frequency before and after infiltration. The experimental results are described as follows. When IV solution was properly infused into the vein, the impedance was nearly constant over time and decreased with increasing frequency. However, when infiltration occurred, the impedance decreased significantly and thereafter gradually decreased with time. In addition, impedance decreased with time for all applied frequencies. In this study, when IV solution penetrated into the surrounding skin and subcutaneous tissue by infiltration, impedance was quantitatively analyzed for as a function of time and frequency. This suggests a method for early detection of infiltration using BIS.

• 한국안전학회지
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• 제23권4호
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• pp.47-52
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• 2008

Many researches on fire risk for normal electric wiring have been pursued in advanced countries such as the USA and Japan, but comparative studies of the partial disconnection and normal state of electric wires have not been conducted. Detection system for the cause of partial disconnection is not developed and prevention countermeasure for electrical fire by the cause is not effective. Therefore, in this paper, partial disconnection characteristics on electric wires were derived and analyzed by experiment and electrical-thermal finite element method(Flux 3D) on the model wires which consist of VCTF(PVC insulated PVC sheathed Cap Tyre Flexible Cord, KS C 3304) and IV(lndoorwire PVC, KS C 3302). VCTF is used in wiring portable electric appliances and the IV is used indoors. Interrelationships between partial disconnection premonitory symptom and current were derived and analyzed by the characteristics based on experiments and thermal analysis for electric wire according to current under normal state and 200% overload state of rated current.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2000년도 추계학술발표대회 및 bio-venture fair
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• pp.567-570
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• 2000

DFA IV를 생산하는 levan fructotransferase를 ${\kappa}\;-carrageenan$을 이용하여 고정화한 결과 카라기난의 농도가 2%일 때 가장 높은 활성을 나타내었다. 이 때에 고정화 담체에 포괄되어지는 효소의 활성도는 0.81 units으로서 soluble enzyme 7.7 units에 비해 상대적으로 낮은 활성을 보여주었다. 고정화 및 soluble enzyme의 최고 활성온도와 최적 pH는 동일하게 $55^{\circ}C$, pH6.0 이었다. 가교제를 처리할 경우에 적당한 농도는 0.5%로 생각되어진다. $37^{\circ}C$에서 시간에 따른 고정화 및 soluble enzyme의 DFA IV 생산량을 HPLC로 분석한 결과 60시간 이후의 전환률이 각각 32%, 61%로 나타났다.

• 한국지반공학회논문집
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• 제19권6호
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• pp.85-97
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• 2003

본 논문에서는 건축물 하중기준 및 해설에서 제시된 지반분류 방법으로 지반 III 또는 IV에 해당하는 지반을 대상으로 등가선형해석을 수행하였고, 해석에서 얻어진 스펙트럴 가속도 값으로 지반계수를 역산하여 국내 각 기준에서 제시하고 있는 지반계수와 비교 검토하였다. 해석결과 고유주기 0.9초 이상 고층 건물의 경우 지반 III의 경우 지반 II의 지반계수의 사용이 가능하였고, IV의 경우 지반 III의 지반계수를 사용하여도 충분하였다. 또한, 대부분의 해석에서 얻어진 지반계수의 값이 국내 내진설계기준의 값보다 상당히 작게 나타났다. 이는 내진설계시 국내 내진설계기준을 그대로 적용하면 구조물 밑면전단력이 보수적으로 산정될 수 있음을 의미한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2002년도 하계학술대회 논문집 C
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• pp.1416-1418
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• 2002

In order to examine the thermal properties of the wire materials, we analyzed the shrinkage, the expansion and the form transformation, the surface structure according to the thermal deterioration temperature through the testing method for a heating shrinkage of Korean Industrial Standard(KS C 3004). For IV(600V grade polyvinyl chloride insulated wires), we measured the shrinkage and the expansion rate, analyzed the surface structure using SEM(Scanning Electron Microscope). In the result of this experiment, the shrinkage rate of IV 2.0mm covering was high in comparison with other wires. As the deterioration temperature rises gradually, the covering is molten and harden.