http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Danbi Chun (검색결과 4 건)
- 무료
- 기관 내 무료
- 유료
-
Separation and recognition characteristics by MIP manufacture using supercritical CO2 technology
변헌수,Danbi Chun,심왕근 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.97 No.-
This research is focused on the experiment of molecular imprinting polymers by supercritical solventtechnology as friendly-environmental process. Methyl methacrylate (MMA) monomer, methacrylic acid(MAA) monomer, VA (vanillic acid) with template and EGDMA (ethylene glycol dimethacrylate) withcross-linking agent were used for molecular imprinting polymers composition. The template has beeneliminated by the Soxhlet extraction method, and the rate of elimination is ca. 95–98 %. The adsorptioncapacities of the synthesized molecular imprinting polymers were estimated using the kinetics andisotherms of restraint, Scatchard investigation, affinity distributions, the materials adsorption withtemplate-like structure, α (selectivity parameter), and HPLC (high performance liquid chromatography)analysis. The evaluation result shows that the manufactured molecular imprinting polymers have highlyselectivity and separation ability. It was also confirmed that there was a difference between theadsorption amounts with EGDMA contents. In this study, prepared molecular imprinting polymers hadan advantage in adsorption selectivity where VA and its structural analog materials are present. Theseresults show that the molecular imprinting polymers selectivity was increased using control the crosslinkingagent.
-
Kim, Seok-Hyun,Chun, Danbi,Yoon, Soon-Do,Byun, Hun-Soo American Chemical Society 2016 Journal of chemical and engineering data Vol.61 No.3
<P>Acetate and acrylate are compounds with weak polarity which show a nonideal behavior. Phase equilibria of these systems play a significant role as organic solvents in industrial processes. In this work, the solubility behavior for the (CO2 + methyl methoxyacetate) and (CO2 + methyl trans-3-methoxyacrylate) mixtures at pressures from (5 to 20) MPa and various temperatures (313.2, 333.2, 353.2, 373.2, and 393.2 K) are measured in the static method with a variable volume high pressure view cell. The experimental results obtained in this research are correlated with Peng-Robinson equation of state and van der Waals one-fluid mixing rule containing two adjustable interaction parameters. The critical constants for the Peng-Robinson equation of state were estimated using the group contributions method. The Lee-Kesler method was used to predict the acentric factor.</P>
-
Byun, Hun-Soo,Chun, Danbi Elsevier 2017 The Journal of supercritical fluids Vol.120 No.2
<P><B>Abstract</B></P> <P>Molecularly imprinted technique is one of the methods to form specific memory sites in a polymer matrix with the template. For main objective of this work, we prepared molecularly imprinted polymers (MIPs) using supercritical fluid technique as an eco-friendly process. MIPs were synthesized using methyl methacrylate (MMA) as a third monomer, methacrylic acid (MAA) as a functional monomer, gallic acid (GA) as a template, and ethylene glycol dimethacrylate (EGDMA) as a crosslinking agent. The template was removed through the method of Soxhlet extraction, and the removal ratio was about 95–99%. The adsorption abilities of prepared MIPs was evaluated by binding kinetics, the binding isotherms, Scatchard analysis, the adsorption of materials with structures similar to templates, high performance liquid chromatography (HPLC) analysis, and the selectivity factor (a), The results of the evaluation indicate that the prepared MIPs have high separation abilities and selectivity. In addition, we identified that although there was a difference of adsorption quantities with the crosslinking agent contents (EGDMA contents), MIPs synthesized in this study had good adsorption selectivity in the presence of GA and its structure analogue materials. From this result, it could be found that the selectivity of MIPs was improved significantly by controlling the crosslinking agent.</P> <P><B>Highlights</B></P> <P> <UL> <LI> GA imprinted polymers were prepared by supercritical polymerization in CO<SUB>2</SUB>. </LI> <LI> Adsorption abilities were evaluated by the adsorption isotherm, Scatchard analysis, and selectivity. </LI> <LI> The prepared GA imprinted polymers have high separation abilities and selectivity. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
-
Hyun, Hoon,Lee, Sungsu,Lim, Wonbong,Jo, Danbi,Jung, Jin Seok,Jo, Gayoung,Kim, So Yeon,Lee, Deok-Won,Um, Sewook,Yang, Dae Hyeok,Chun, Heung Jae Elsevier 2019 Journal of industrial and engineering chemistry Vol.70 No.-
<P><B>Abstract</B></P> <P>In this study, we prepared a beta-cyclodextrin (β-CD)-based carrier consisting of β-CD, polyethylene glycol (PEG) and folic acid (FA) (CDPF) for improved doxorubicin (DOX) delivery to targeted breast cancer <I>in vitro</I> and <I>in vivo</I>. The morphology and size distribution were characterized by transmission electron microscopy (TEM) and dynamic light scattering (DLS) measurements, which revealed in particles ranging from 38nm to 52nm in size. DOX from CDPF was released in a sustained manner for 48h. Cell viability analysis showed the low toxicity of free DOX, whereas CDPF-DOX remarkably exhibited reduced viability after incubation for 7 days. <I>In vivo</I> animal test showed that intravenous injection of CDPF-DOX contributes to decreased tumor volume, along with no systemic toxicity and cardiotoxicity. The results suggested that CDPF can maximize the efficacy of DOX delivery; therefore can be used as a good candidate for developing optimal drug delivery systems.</P>
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
