K
Keiji Enpuku
Researcher at Kyushu University
Publications - 241
Citations - 3523
Keiji Enpuku is an academic researcher from Kyushu University. The author has contributed to research in topics: Magnetic nanoparticles & SQUID. The author has an hindex of 28, co-authored 238 publications receiving 3216 citations.
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Journal ArticleDOI
Development of a SQUID System Using Field Reversal for Rapidly Detecting Bacteria
Akira Tsukamoto,Takako Mizoguchi,Akihiko Kandori,Hiroyuki Kuma,Naotaka Hamasaki,Hisao Kanzaki,Naoki Usuki,Kohji Yoshinaga,Keiji Enpuku +8 more
TL;DR: In this article, a pathogen detection method using a highly sensitive HTS-SQUID and magnetic markers was developed, which can detect Candida albicans, a pathogenic fungus.
Journal ArticleDOI
Difference in AC magnetization between suspended and immobilized magnetic nanoparticles in Néel-relaxation dominant case: Effect of easy axis alignment in suspended nanoparticles
Keiji Enpuku,Ahmed L. Elrefai,Ahmed L. Elrefai,Jinnya Gotou,Shuya Yamamura,Teruyoshi Sasayama,Takashi Yoshida +6 more
TL;DR: In this article, the authors studied magnetic properties of suspended and immobilized MNPs when the Neel relaxation time is much shorter than the Brownian and showed that they have different magnetic properties such as AC magnetization curves and harmonic spectra.
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Properties of Magnetic Nanoparticles for Magnetic Immunoassays Utilizing a Superconducting Quantum Interference Device
TL;DR: In this article, the properties of magnetic nanoparticles are studied for application to magnetic immunoassays utilizing a superconducting quantum interference device (SQUID), and the binding reaction between an antigen and its antibody is detected by measuring the magnetic field from the marker.
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Feasibility study on a new three-phase power transmission cable with radial arrangement of superconducting tapes
Kazuhiro Kajikawa,Yasunori Mawatari,Y. Iiyama,T. Hayashi,Keiji Enpuku,Kazuo Funaki,Mitsuho Furuse,S. Fuchino +7 more
TL;DR: In this paper, a new type of superconducting power transmission cable is proposed to fulfill both the conditions of low AC loss and rare leakage magnetic flux, and numerical estimation of AC losses in the proposed power cables is carried out by means of a finite element method as well as those in the conventional types of cables.
Journal ArticleDOI
Effect of Viscosity on Harmonics Signals of Magnetic Nanoparticles for Thermometry Application
TL;DR: In this paper, the effect of viscosity on the harmonic signals of magnetic nanoparticles (MNPs) for thermometry application was studied, and the experimental results for Resovist MNPs samples were presented when they were changed from 0.89 to 5.2 mPa·s.