• YAKHAK HOEJI
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• v.40 no.6
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• pp.625-631
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• 1996

The $H^+$-selective membrane consists of tridodecylamine, 2-nitrophenyl octyl ether and a little amount of additive in carboxylated PVC matrix, where penicillinase(Pcase ) and glutaraldehyde may be covalently attached to the matrix. When the $H^+$-selective electrode was used as a detector of biosensor, calibration curve calculated from Nernst equation was not linear. So we investigated the characteristic responses of the $H^+$-selective electrode to the product H+ from hydrolysis of penicillin-G(Pc-G) and plotted calibration curve correlating potential to concentration of Pc-G linearly. The optimal concentration of buffer solution was theoretically calculated and was also experimented. We tried to explain the linear curve of potential to concentration of Pc-G by using Henderson-Hasselbach equation. This method is more effective in calibration curve plotting than any other previous methods. The results obtained may help in further developing pH electrodes with improved analytical preformance.

• Korean Journal of Plant Taxonomy
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• v.44 no.4
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• pp.276-280
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• 2014

Two alien plants Holosteum umbellatum L. and Asperugo procumbens L., belonging to Boraginaceae and Caryophyllaceae, respectively, have been first recorded in Hongseong-gun, Chungcheongnam-do and Incheon, South Korea. This initial investigation reports to inform the importance of detection and extermination of these potential weeds in surrounding areas. Furthermore, we report the morphological characteristic features of these two alien plants.

• Journal of the Korean Society of Clothing and Textiles
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• v.27 no.7
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• pp.831-842
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• 2003

The purpose of this study is to analyze body types of Chinese women and provide concrete information on it by classifying them into several representative groups. As for the method of this study, statistical analysis is made of 79 items. This is done from July 18 to Aug 07, 2002, 525 female subjects from age 20 to 49 participated in this study. They all live in Beijing and Shanghai in China. The results of this study are as follows. 1. Means, standard deviations, the maximum and minimum of 19 items are extracted. The height and girth item have a high standard deviations. 2. 8 factors are extracted by using factor analysis. Factor 1: body obesity, Factor 2: vertical body size, Factor 3: upper body length Factor 4: size of ankles, Factor 5: angle of shoulders, Factor 6: length of hip Factor 7: size of shoulder, Factor 8: shape of chest 3. The body types of Chinese women are classified into 5 sub groups from the result of the Cluster analysis.

• Journal of the Korean Society of Clothing and Textiles
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• v.29 no.9_10 s.146
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• pp.1241-1252
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• 2005

This study tried to compare and analyze the body measurements of female adults in China by various age groups. As for the study method, direct and anthropometric measurements were used on the 357 female subjects living in Yenbien and Harbin, China, consisting of 122 women in their 20's, 114 women in their 40's, and 121 women in their 60's. The results were as follows: 1. The comparison of major body measurements between Korean Chinese and Korean in land indicated that the former were shorter and plumper than the latter. Those groups in their 60's did not show any significant difference in height related measurements and revealed less differences in body measurements comparing to other age groups. 2 The comparison of Chinese anthropometric measurements among age groups of Korean Chinese indicated that, higher the age, shorter the height measurements, the leg length shorter, the upper-half body length longer, and the chest drooping due to the breast descent. 3. The comparison of indirect measurements among age groups of Koreans Chinese indicated that those in their 60's showed many items of big discrepancies in comparison with those in their 20's or 40's, with wide gap in discrepancies, thus resulting in large differences among individuals.

• Proceedings of the Korean Society of Dyers and Finishers Conference
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• 2009.03a
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• pp.81-82
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• 2009

IEC 60456 declared the cocoa soiled cloth to be one of the standard soiled test cloths for measuring the performance of the clothes washing machines. Researchers for textile washing have known that cocoa soiled cloth has shown unpredictable washing performance. The color of cocoa mainly comes from flavonoids, and flavonoids reversibly change color with alkalinity from pH 1 to pH 7 as food colorants. The color change of flavonoids under various washing conditions, in the alkali solution, has not yet been confirmed. In this study, we have investigated the color change and the soil removal of the cocoa soiled cloth which were washed with alkaline washing liquids of various hardnesses. The cocoa soiled cloth which was washed in the water which was 60ppm or higher became darker than the soiled cloth. When the cloth was washed in the detergent solution, the cloth was slightly darker only when the washing condition was $20^{\circ}$ and 250ppm. As the water hardness increased, the soil removal decreased and the higher washing temperature was more effective.

• Journal of the Korean Society of Earth Science Education
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• v.6 no.3
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• pp.185-195
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• 2013

This study has been analyzed various exhibition in Ulsan Museum of Science which was opened in March 2011 and found out the connections between elementary school science and its curriculum. In addition, this study has pointed out how visitors' behavioral patterns change depending on the characteristics of exhibition. The Study has also examined the visitors' satisfaction on the educational effectiveness, facilities and environment of the museum and aimed to seek ways to revitalize and improve the general conditions of exhibition rooms which is essential for Ulsan Museum of Science. The results of analysis on the form exhibition showed that 31.7% were in a passive form and the other 68.2% were in active form which was 43 out of 63 exhibition. After analyzing the visitors behavioral patterns, the majority of exhibition with higher attraction power and holding power were active-type exhibition and especially the experience-type exhibition takes the large portion. Based on the survey, we found out that both students and teachers represent high expectations of pleasure through active experience. They showed high satisfaction rates on the number of exhibition, guide facilities, inside temperature and accessibility of Ulsan Museum of Science.

• Journal of Fashion Business
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• v.10 no.4
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• pp.45-54
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• 2006

This study analyzed the purchasing behavior for underwear, with the subjects of pregnant women, and the trend of its fit preference and thereby looks into the practices of their clothing life to provide the basic data for the formation of maternity clothing industry, focusing on the underwear development in response to pregnant women's body type features. The conclusion were as follows: 1. The analysis of underwear wearing practices for the women in the pregnancy of eight months or longer and those after the delivery within one month showed that about 80-90% of them wore panties or brassieres and about 70% of them did not wear girdles, thus with a lower level for girdles than for panties or brassieres. 2. The surveys of the satisfaction and fit for two designs each with the high wearing frequency did not show any relatively significant difference in assessment by the design. The analysis of the satisfaction by the part with the maternity underwear indicated that in the case of panties the respondents were dissatisfied with the length as to be long, and also dissatisfied with waist circumference, abdomen circumference, private parts, and groin as to be small, reflecting that the circumference coverage of the panties in the market was not effectively managed.

• Journal of Korean Society on Water Environment
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• v.30 no.3
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• pp.292-297
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• 2014

We synthesized the self-organized nanoporous oxide with potentiostatic anodization of iron foil. The iron oxide nanocomposite (INCs) were fabricated in 1M $Na_2SO_4$ containing 0.5wt% NaF electrolyte holding the potential at 20, 40 and 60 V for 20min, respectively. Field Emmision Scanning Electron Microscopy (FESEM) and X-ray Diffractometer (XRD) were used to evaluate the micromorphology and crystalline structure of INC film. Also, this study was performed to evaluate the fenton reaction using INC film with hydroperoxide for degradation of cyanide dissolved in water. In case of INC-40V in the presence of $H_2O_2$ 3%, the first-order rate constant was found to be $1.7{\times}10^{-2}min^{-1}$, and indicated to be $1.2{\times}10^{-2}min^{-1}$ on commercial hematite powder. This result is shown to be good performance enough to replace the powder type for treatment of wastewater.

• Journal of Industrial Technology
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• v.26 no.A
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• pp.189-197
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• 2006

Water shortage as well as water control problems including urban flood and drought have led to developing technologies for rainwater utilization in order to provide a sustainable water supply. However, relatively few works have been done to improve the water quality during rainwater utilization. Therefore, in this study, the characteristics of rainwater were examined in terms of pollutant concentrations and outflow rate. A experimental rain and roof model($1m{\times}1m$) were produced to evaluate wash-off properties of pollutants. And rainfall intensity were standardized in 10 mm/hr, a experimental model roof catchment surface were coated in $TiO_2$ photocatalyst. Samples of runoff rainwater collected from a experimental model were analyzed for physicochemical parameters such as Turbidity, Suspended Solid, EC. The results show that the first flush of rainwater contains substantial amount of contaminants that potentially pollute the whole rainwater. Surface treatment of roof catchment area using $TiO_2$ photocatalyst allowed a better runoff property of rainwater because of its improved hydrophilicity.

• Advances in pediatric surgery
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• v.17 no.1
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• pp.72-80
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• 2011

Although laparoscopic surgery for hepatobiliary disease in children is possible, it is technically challenging. In an attempt to overcome these difficulties, the da Vinci Robotic Surgical System$^{(R)}$ was used to facilitate the minimally invasive treatment of choledochal Cyst in six children. In early consecutive three cases, we experienced three complications; a case of laparotomy conversion, a case of late stenosis of the hepaticojejunostomy, and a case of leakage from a hepaticojejunostomy. However, in the last three cases the complete resection of the choledochal cyst and Roux-en-Y hepaticojejunostomy were performed using the robotic surgical system without complication. We think robot-assisted choledochal cyst resection in children appears safe and feasible, and may increase the variety of complex procedures in pediatric surgical fields.