• Bulletin of the Korean Chemical Society
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• v.31 no.6
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• pp.1583-1588
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• 2010

A single step fabrication process of carbon nanotube/Prussian Blue (CNT/PB) paste electrodes based on screen printing technology has been studied as an amperometric sensor for the determination of hydrogen peroxide and free chlorine. Compared to the classical carbon paste (CP) electrode, the CNT paste electrode greatly enhanced the response in the presence of hydrogen peroxide due to the electrocatalytic activity of the CNT. Based on the CNT/binder paste, PB was also incorporated into a network of CNT paste and characterized. The best electroanalytical properties of PB-mixed sensors to hydrogen peroxide were obtained with PB ratio of 10 wt % composition, which showed fast response time ($t_{90}{\leq}5$ s; 0.2 - 0.3 mM), low detection limit of 1.0 ${\mu}M$, good linear response in the range from $5.0{\times}10^{-5}$ - $1.0{\times}10^{-3}$ mol $L^{-1}$ ($r^2$ = 0.9998), and high sensitivity of -8.21 ${\mu}AmM^{-1}$. In order to confirm the enhanced electrochemical properties of CNT/PB electrode, the sensor was further applied for the determination of chlorine in water, which exhibited a linear response behavior in the range of 50 - 2000 ppb for chlorine with a slope of 1.10 ${\mu}Appm^{-1}$ ($r^2$ = 9971).

• Journal of the Korean Applied Science and Technology
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• v.33 no.1
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• pp.67-74
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• 2016

The Prussian Blue Analogue(PBA) has three dimensional structure and the metal - organic framework material, and it has a variety configurations depending on the type of organic ligands. PBA has been receving an attention in the fields of biosensors, optical, catalytic, and hydrogen storage device. Also, it is an environmental friendly substance with a chemical stability. In addition, PBA is widely used in the filed of adsorption art since we can adjust the size of the fine pores. In this study, we synthesized $Mn_3[Fe(CN)_6]_2$, an organometallic framework chains by using a hydrothermal synthesis method. We used $K_4[Fe(CN)_6]$ and $MnCl_2$ as precursors. We also produced a manganese iron oxide, by baking the synthesized material. The effect of the size and shape of the particles was examined by controling pH of the precursor solution, the molar concentration of the precursor, and reaction time as the experimental variables. Synthesized absorbent was analyzed by XRD, SEM, FT-IR, UV-Vis, and TG / DTA to evaluate the adsorption properties of several dyes.

• Journal of the Korean Society of Costume
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• v.49
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• pp.155-172
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• 1999

The purpose of this study was to investigate the effect of children's personality traits and parental child-rearing attitudes on clothing attitudes and color evaluation of preschool children. The subjects for this study consisted of 360 five-year-old children who were attending a preschool and their parents in Cheju Island Korea. Employed mothers had significantly higher score on love acceptance attitude than unemployed mothers did. Female children had more conservative attitude on clothing sex-role than male children did There were no significant gender differences in parental child-rearing attitudes. There were significant relationships between gender and preferred clothing colors. Male children were more likely to prefer blue red, green, and prussian blue for the colors of clothing than were female children while female children liked pink yellow and orange more than male children. Boys selected blue and girls selected pink as the most preferred clothing color. Overall preschool children chose red as the most preferred color black as the most disliked color. The children's sex identification by clothing color was highly consistent with the conservative attitude of adults for all colors. That is preschool children identified pink red and yellow with female color while prussian blue blue and green with male color. Clothing interest of boys was influenced by the mother's state of employment and academic trait. The boys high in academic trait and whose mothers did not have job were high in clothing interest. Clothing management of boys was influenced by emotionality and love acceptance rearing Ttitude. Clothing independednce of boys was influenced by authority control rearing attitude Clothing sex-role of boys was influenced by familism trait. The boys high in familism trait had open-hearted attitude in clothing sex-role. Clothing interest of girls was influenced by academic trait clothing management by sociality clothing independence by emotionality and clothing satisfaction by familism trait. Therefore the more positive personality children had the higher clothing interest and the more desirable clothing attitudes they had.

• Parasites, Hosts and Diseases
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• v.21 no.1
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• pp.32-39
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• 1983

실험동물에서 짧은 기간 감염시킨 후 얻은 간흡충(Clonorchis sinensis)에서는 거의 볼 수 없지만, 간, 담도 수술 또는 부검을 실시할 때 사람에서 얻은 간흡충중에는 검은 색소를 갖는 것을 관찰할 때가 있다. 이 색소는 살아 있는 간흡충에서도 명백하며, 색소가 없는 간흡충은 색이 분홍빛이고 투명한데 비하여 색소가 있는 것은 검은색을 띠고 불투명하다. 사람에서 얻은 간홉충 모두가 검은 색소를 갖고 있는 것은 아니며, 이제까지의 경험으로는 30세 이상 어른에서 얻은 간흡충중 그 길이가 약 1cm이상인 것에서 나타난다. 이 색소의 성분에 대하여 과거에는 빌리루빈, 또는 숙주 혈구세포에서 유래한 철을 포함하는 색소일 것이라고 생각하고 있었다. 저자등은 이 색소가 간흡충의 노쇠현상과 관련된 것으로 생각하고, 그렇다면 lipofuscin일 것이라고 생각하였다. 위의 가정을 확인하기 위하여 육안적으로 분명히 검은 색소가 있은 충체의 조직절편을 만들고, H & E, prussian blue, bilirubin, Fontina-Masson, PAS, amylase-PAS, Ziehi-Neelsen 및 AFIP method for lipofuscin등 8가지 조직화학적 염색을 실시하였다. 색소는 H & E, prussian blue, bilirubin, montana-Masson염색으로 착색되지 않았으며, PAS, amylase-PAS, Ziehi-Neelen, 및 AFIP method for lipofuscin에 염색되어 이것이 조직화학적으로 리포푸신 색소임을 확인하였다. 색소를 다시 전자현미경으로 관찰한 바 색소과립안에는 모양이 등글거나 타원형이고 크기가 $0.05~0.240{\mu}m$인 세포막구조가 산재하였음을 발견할 수 있어 간흡충의 검은 색소는 리포푸신 색소임을 다시 확인할 수 있었다.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2022.11a
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• pp.167-168
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• 2022

Recently, starting with the permanent suspension of Gori 1 in Korea, the importance of the disposal of concrete structures in nuclear power plants has emerged, and environmental and safety are required to be proved accordingly. Safe radioactive waste disposal technology that immobilizes harmful radioactive elements, which are by-products of nuclear power, inside a solid matrix and recycling measures are needed to secure an efficient waste disposal space. This study was conducted to confirm whether recycled cement generated in the process of radioactive concrete treatment can be used as a solidifying material for radioactive waste treatment. In order to simulate the concrete exposed to radiation, aqueous solutions of Di-water, CsCl 1M, and CoCl₂ 1M were used as blending water at W/B 0.5. Tricalcium phosphate and Prussian blue were substituted with 5 wt.% based on the weight of recycled cement as a binder to improve solidification performance, and their hydration characteristic was analyzed.

• Journal of the Korean Electrochemical Society
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• v.23 no.1
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• pp.11-17
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• 2020

The Prussian blue analogues of Fe₂(CN)₆ and Na_xFe₂(CN)₆ are prepared by precipitation method and evaluated the electrochemical characteristics as positive electrode materials for lithium-ion batteries (LIBs) because of their low cost. Fe₂(CN)₆ shows a low reversible capacity of 34.6 mAh g^-1, whereas sodium-containing Na_xFe₂(CN)₆ exhibits a reversible capacity of 107.5 mAh g^-1 when the discharge process proceeds first. When charging is first carried out to remove sodium in the structure, the reversible capacity of 114.1 mAh g^-1 is achieved and the cycle performance is further improved. In addition, Na_x-Fe₂(CN)₆ is synthesized at 0℃, room temperature (RT), and 60℃, respectively. Regardless of the synthesis temperature, Na_xFe₂(CN)₆ shows similar initial reversible capacity, but the crystallite size is formed smaller and improved cycle performance when synthetic temperature is lower. The sample synthesized at 0℃ shows a reversible capacity of 86.4 mAh g^-1 at the 120^th cycle and maintains 76.8% of the initial capacity.

• Journal of Korean Neurosurgical Society
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• v.54 no.6
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• pp.467-476
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• 2013

Objective : This study aimed to evaluate the hypotheses that administration routes [intra-arterial (IA) vs. intravenous (IV)] affect the early stage migration of transplanted human bone marrow-derived mesenchymal stem cells (hBM-MSCs) in acute brain infarction. Methods : Male Sprague-Dawley rats (n=40) were subjected to photothrombotic infarction. Three days after photothrombotic infarction, rats were randomly allocated to one of four experimental groups [IA group : n=12, IV group : n=12, superparamagnetic iron oxide (SPIO) group : n=8, control group : n=8]. All groups were subdivided into 1, 6, 24, and 48 hours groups according to time point of sacrifice. Magnetic resonance imaging (MRI) consisting of T2 weighted image (T2WI), $T2^*$ weighted image ($T2^*WI$), susceptibility weighted image (SWI), and diffusion weighted image of rat brain were obtained prior to and at 1, 6, 24, and 48 hours post-implantation. After final MRI, rats were sacrificed and grafted cells were analyzed in brain and lung specimen using Prussian blue and immunohistochemical staining. Results : Grafted cells appeared as dark signal intensity regions at the peri-lesional zone. In IA group, dark signals in peri-lesional zone were more prominent compared with IV group. SWI showed largest dark signal followed by $T2^*WI$ and T2WI in both IA and IV groups. On Prussian blue staining, IA administration showed substantially increased migration and a large number of transplanted hBM-MSCs in the target brain than IV administration. The Prussian blue-positive cells were not detected in SPIO and control groups. Conclusion : In a rat photothrombotic model of ischemic stroke, selective IA administration of human mesenchymal stem cells is more effective than IV administration. MRI and histological analyses revealed the time course of cell migration, and the numbers and distribution of hBM-MSCs delivered into the brain.

• Journal of the Korean Magnetics Society
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• v.22 no.4
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• pp.125-129
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• 2012

By employing soft x-ray absorption spectroscopy (XAS) and soft x-ray magnetic circular dichroism (XMCD), the electronic structures of molecule-based nano bioparticles, such as Helicobacter pylori ferritin (H. pylori ferritin), Heme, $NaM[Fe(CN)_6]{\cdot}H_2O$-type Prussian Blue (M=Co, Ni) analogue, have been investigated. The measured Fe 2p XAS spectra reveal that Fe ions are trivalent ($Fe^{3+}$) in H. pylori ferritins, while they are in the $Fe^{2+}-Fe^{3+}$ mixed-valent states in $NaM[Fe(CN)_6]{\cdot}H_2O$ Prussian Blue analogues (M=Co, Ni). According to the Fe 2p XMCD spectrum of high-state H. pylori ferritin, all the $Fe^{3+}$ ions have the same local symmetry and their magnetic moments are aligned in the same direction. It is also found that the Fe 3d orbitals in $NaM[Fe(CN)_6]{\cdot}H_2O$ have a strong covalent bonding to $(CN)^-$ ligands, but with a very weak bonding to the 2p orbitals of O ligands.

• Proceedings of the Korean Magnestics Society Conference
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• 2008.12a
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• pp.169.2-169.2
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• 2008

• Analytical Science and Technology
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• v.14 no.5
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• pp.377-383
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• 2001

Total amounts of phenolic compounds of Korean apples were determined by UV-visible spectrphotometry of Folin-Dennis, Prussian-blue and vanillin-HCI, respectively. The analytical data from the method of Folin-Dennis were estimated to be the most reasonable to determine the total amounts of phenolic compounds in Korean apples. It was also confirmed that the amounts of total phenolics could be calculated as chlorogenic acid equivalence, more effectively than that of other phenolic compound equivalence.