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Kang, Eun Bi,Mazrad, Zihnil Adha Islamy,Robby, Akhmad Irhas,In, Insik,Park, Sung Young Elsevier 2018 European polymer journal Vol.105 No.-
<P><B>Abstract</B></P> <P>The present study aimed to develop an enzymatic colorimetric method using a surface-adsorbing biosensor to detect and kill bacteria in a single, simple, and rapid assay. The phosphorylated fluorescent probe 2-hydroxychalcone (HCAP) conjugated with an adhesive cationic polymer was designed (HCAP-PVP), which yielded greenish-yellow emission in aqueous buffer. Upon introduction of <I>Escherichia coli</I> and <I>Staphylococcus aureus</I>, the phosphate group inside the HCAP was cleaved by endogenous alkaline phosphatase (ALP) and the greenish-yellow emission ratiometrically changed to deep-red emission. This biosensor system detected bacteria over a wide range of bacterial densities (10<SUP>1</SUP>–10<SUP>7</SUP> colony-forming units/mL) after 60 min, with similar bacterial detection abilities between aqueous- and solid-phase assays. Furthermore, the presence of a quaternary ammonium of dodecane in this system displayed efficient antibacterial activity because of the change in cellular hydrophobic interactions, which enabled this material to act as a dual sensor and killing material. Thus, this system is a novel, rapid, and simple enzymatic sensor with high sensitivity that can be used as a solid-based platform to detect and directly eliminate bacteria.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A colorimetric method was designed for detection of bacteria based on ALP activity. </LI> <LI> HCAP-conjugated adhesive cationic polymer showed fluorescent changes in response to ALP. </LI> <LI> Quaternary ammonium of dodecane in this system provided antibacterial activity. </LI> <LI> This system can be used for both aqueous- and solid-phase assays. </LI> <LI> This sensor showed excellent bacteria detection ability and antibacterial activity. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Kang, Eun Bi,Lee, Jung Eun,Mazrad, Zihnil Adha Islamy,In, Insik,Jeong, Ji Hoon,Park, Sung Young The Royal Society of Chemistry 2018 Nanoscale Vol.10 No.5
<P>We developed nanoparticles comprising a photothermal dye (IR825)-loaded carbonized zwitterionic polymer [FNP-I] as “switch-on” pH-responsive fluorescence probes to sense intracellular cancer cells and for near-infrared (NIR) controllable photothermal therapy (PTT) <I>in vivo</I> and <I>in vitro</I>. The fluorescent “off” of FNP-I was activated after reaching the cancer cell environment, where the zwitterionic compartment of FNP lost its hydrophobicity to induce PTT-mediated heat release of IR825 under NIR irradiation in the tumor. Approximately 100% of the IR825 was released from the FNP core to generate high thermal conversion to completely kill the cancer cells. Furthermore, after intravenous treatment of FNP-I into MDAMB-231-cell bearing mice, pH-responsive photothermal therapy was observed, achieving marked ablation of tumor cells with release of IR825 under tumor environment conditions. In addition, fluorescent signals were clearly found at the tumor site after 3 h, decreasing at the 6 h time point. The <I>in vitro</I> and <I>in vivo</I> detection system demonstrated good cellular uptake and biocompatibility as a potential imaging-guided photothermal therapy nanotool for cancer treatment. Interestingly, the synergism of the biosensor and PTT in single FNP-I platform led to more effective cancer cell killing than either monotherapy, providing a new approach for cancer treatment.</P>
Relationships among Nursing Students' Recognition, Perceived Usefulness, and Intention to Accept IoT
KANG, Ji-Yeon,KONG, Ye-Won,KIM, Eun-Bi,KIM, Eun-Ae,PARK, Sun-Joo,PARK, Jina,SEONG, Ji-Yeon,SON, Chae-Eun,LEE, Bo-Mi,KIM, Yunmi Korea FoodHealth Convergence Association 2021 식품보건융합연구 (KJFHC) Vol.7 No.1
The purpose of this study was to investigate the degree of recognition, perceived usefulness, and intention to accept the Internet of Things (IoT) in healthcare among nursing students, as well as to determine related factors. Through this study, we wanted to develop the basic research for the education related to the IoT in healthcare. In this study, data were collected from 348 nursing students using self-report online questionnaires, Naverform, and analyzed using the independent sample t-test, one-way analysis of variance, and Pearson correlation coefficients in SPSS version 26.0. The results of the study show that recognition of the IoT was correlated with its perceived usefulness (r=0.37; p<.001) and intention to accept the IoT (r=0.23 (p<.001). The strongest correlation was found between perceived usefulness of the IoT and intention to accept (r=0.67; p<.001). In conclusion, recognition of the IoT in healthcare affected its perceived usefulness, and a significant correlation was found between perceived usefulness of the IoT and intention to accept it. This study analyzed how much recognition, perceived usefulness, and intention to accept IoT in healthcare nursing students have. Based on these findings, we suggest that education related to the IoT in healthcare should be incorporated into the nursing curriculum.
Kang, Eun Bi,Lee, Gi Baek,In, Insik,Park, Sung Young Elsevier 2018 European polymer journal Vol.101 No.-
<P><B>Abstract</B></P> <P>We herein report the development of a tumor-targeting, pH-responsive, and enzymatically degradable crosslinked fluorescent nanogel (F-nanogel) of boronic acid-conjugated lactose modified-chitosan (chitlac-BOH) and dopamine- and nitric oxide-conjugated partially carbonized hyaluronic acid [NO/DA-FNP(HA)] for doxorubicin (DOX) loading. In DOX-loaded F-nanogels, DOX and NO were released owing to the pH-dependent cleavage of boronic acid-catechol diol crosslinking and the enzymatic activity of hyaluronidase (HAase). The combination of both pH and HAase in cancer cells selectively regulate the release of DOX and NO by enzymatic activity. We further confirmed the specificity of this drug delivery carrier to the desired location by using confocal imaging, while NO release by HAase was confirmed via diaminofluorescein-2 diacetate assay. This nanoparticle system utilized tumor-targeting HA to deliver DOX and NO within cancer cells, while tracking is performed via bio-imaging based on fluorescent HA. Finally, the F-nanogel(DOX) can be broadly tested as a medical material with a broad range of potential applicability for monitoring cancer and the incorporation of drug and NO co-delivery systems.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Tumor-targeted, pH and enzymatically degradable fluorescent nanogel were designed. </LI> <LI> Our designed system show excellent DOX and NO release <I>in vitro</I> of cancer cell. </LI> <LI> Fluorescent nanogel allows great specificity of cancer imaging and chemotherapy. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
석탄저회를 여재로 활용한 건설현장 발생 탁수의 여과특성에 관한 연구 I. 실내 상향류 여과 컬럼 실험
강은비(Eun Bi Kang),주진철(Jin Chul Joo),방기웅(Gi Woong Bang),김진호(Jin Ho Kim),박병욱(Byung Uk Park),최종수(Jong Soo Choi),김용혁(Yong Hyok Kim) 대한환경공학회 2019 대한환경공학회지 Vol.41 No.2
비교적 입경이 크고 내외부 공극과 표면적이 잘 발달된 다공성 석탄저회를 건설현장 발생 탁수 내 부유물질의 유출저감에 활용할 수 있는 탁수여재로 적용 타당성을 검토하였다. 석탄저회를 건설현장의 탁수 내 부유물질 유출저감용 여재로 활용 시 부유물질 여과효율은 석탄저회의 입경과 분포, 탁수의 유입선속도 및 부유물질 유입부하량에 따라 결정되는 것으로 조사되었다. 입경 3~6 mm의 석탄저회와 입경 10~20 mm의 석탄저회는 부유물질 유입부하량이 증대됨에 따라 여과효율은 급격히 감소하였으나, 입경 6~10 mm의 석탄저회는 부유물질 유입부하량의 변화에도 가장 안정적인 여과효율을 나타내는 것으로 확인되었다. 또한, 부유물질 전체여과효율은 유입부에 위치한 석탄저회의 폐색에 의해 큰 영향을 받는 것으로 조사되었으므로, 석탄저회를 여재로 적용 시 비교적 큰 입경의 석탄저회를 초기에 탁수와 접촉할 수 있는 유입부에 배치하여 여재 폐색을 지연시켜 장기간 여재로서 활용이 가능할 것으로 판단된다. 또한, 석탄저회 여재는 다른 여재 대비 높은 여과효율을 나타냈고, 부유물질 유입부하가 증가하여도 안정적인 여과효율을 지속하는 것으로 분석되었다. 따라서 강우 시 부유물질 유입부하량이 단기간에 집중되는 건설현장에서는 다양한 입경의 석탄저회를 효과적으로 배치하여 단기간에 여재가 폐색되는 것을 방지하고 높은 부유물질 여과효율을 유지가 가능하며, 여재로 활용 후 건설현장에 지표매립 및 기존 토양과 혼입하여 성토재로 활용이 가능한 현장 적용성이 우수한 여재로 판단된다. The feasibility for usage of porous bottom ash with various diameters and high surface areas as filter media to reduce the discharge of suspended solids (SS) in construction sites was investigated. As a filter media in construction site runoffs, the filtration efficiency of bottom ash to reduce the discharge of SS was found to be dependent on the diameter and the distribution of bottom ash, the linear velocity of turbid water, and the inflow SS loadings. Although the filtration efficiency of bottom ash with diameters of 3~6 mm and 10~20 mm significantly decreased as the inflow SS loadings increased, the filtration efficiency of bottom ash with diameters of 6~10 mm was stable despite of the variations in the inflow SS loadings. Additionally, since the overall filtration efficiency of bottom ash filter media was significantly affected by the clogging of the inlet in filter media, the bottom ash with greater diameters was installed in the inlet in filter media, and longer life span of filter media was expected. Compared to other filter media, the filtration efficiency of bottom ash as a filter media was greater and more stable despite of the variations in the inflow SS loadings. Thus, the short-term clogging of bottom ash filter media was protected and greater filtration efficiency of SS can be maintained by efficiently arranging bottom ash of various diameters in construction sites. After the usage of bottom ash as an excellent filter media, the bottom ash can be used as landfill and mixing materials with existing soil at the construction site.