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- 저자 : Md. Enamul Haque (검색결과 4 건)
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3D-structure coupled monopole designs with lower frequency resonance
Enamul Khan,Md. Ataur Safi Rahaman Laskar,Khan Masood Parvez,SK. Moinul Haque 한국전자통신연구원 2025 ETRI Journal Vol.47 No.1
In this study, we investigated three-dimensional configurations involving a monopole-coupled wired ring, a hollow metallic cylinder, and wired helix spring to achieve resonance lower than quarter-wave resonance. The reso-nance frequency of a quarter-wave monopole, originally 2.05 GHz, was signifi-cantly lowered by 54.53% through effective coupling with a wired ring, and a quarter-wave monopole properly coupled with a hollow metallic cylinder experienced a large decrease of 64.34%. The primary incentive for connecting a wired ring to a hollow metallic cylinder is to significantly reduce resonance frequency. Efforts were also made to lower resonance frequency in a wired helix spring with a length close to that of the wired ring, resulting in a substan-tial 78.83% reduction in resonance frequency. The 10 dB bandwidth was 14.63% for the quarter-wave monopole, 27.21% for the monopole-coupled wired ring, 33.71% for the monopole-coupled hollow metallic cylinder, and 4.69% for the monopole-coupled helix spring. The ka values for the monopole-coupled wired ring, hollow metallic cylinder, and helix spring were 0.35, 0.27, and 0.16, respectively. Hence, these antennas can be classified as electrically small antennas. The achieved resonant frequencies have applications in vari-ous wireless communication scenarios. The experimental results from the fab-ricated prototype agree well with the simulation results.
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Tae-Jun Kwon,Da-Sol Lee,Md. Enamul Haque,Rang-Woon Park,Byungheon Lee,Dongkyu Kim,Yong-Hyun Jeon,Kil-Soo Kim,Sang Kyoon Kim 한국실험동물학회 2021 한국실험동물학회 학술발표대회 논문집 Vol.2021 No.7
The development of reliable methods to diagnose acute kidney injury is essential to allow the adoption of early therapeutic interventions and evaluate their effectiveness. Based on the fact that kidney injury molecule-1 (KIM-1) expression levels in kidneys are markedly upregulated early after a damage event, here we developed a noninvasive KIM- 1-based molecular imaging technique to detect kidney injury. First, we took advantage of a phage-display platform to select small peptides demonstrating a specific high binding affinity to KIM-1. The promising candidate was conjugated with fluorescent probes, and its imaging potential was validated in vitro and in vivo. This peptide, with the sequence CNRRRA, not only showed a high imaging potential in vitro, allowing a strong detection of KIM-1 expressing cells by microscopy and flow cytometry but also generated a strong kidney-specific signal in live-imaging in vivo experiments in the context of a drug-induced kidney-injury mouse model. Our data overall suggest that the CNRRRA peptide is a promising probe to use in the context of in vivo imaging for the detection of KIM-1 overexpression in damaged kidneys.
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Peptide-based targeted therapeutics and apoptosis imaging probes for cancer therapy
Vadevoo, Sri Murugan Poongkavithai,Gurung, Smriti,Khan, Fatima,Haque, Md. Enamul,Gunassekaran, Gowri Rangaswamy,Chi, Lianhua,Permpoon, Uttapol,Lee, Byungheon Springer-Verlag 2019 Archives of Pharmacal Research Vol.42 No.2
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