MF Researcher Database

Researchers Database

Advance

Hiroyuki Takei

    Department of Life Sciences　Professor
    Bio-Nano Electronics Research Center　Researcher
    Research Institute of Industrial Technology　Researcher
    Course of Life Sciences　Professor
Last Updated :2024/04/23

Researcher Information

Research funding number

  • 40520789

J-Global ID

Research Areas

  • Nanotechnology/Materials / Analytical chemistry

Education

  • 1985/09 - 1992/02  Cornell University  Department of Applied and Engineering Physics
  • 1984/10 - 1985/05  Universitaet von Heidelberg  Department of Physics
  • 1980/09 - 1984/05  Cornell University  Department of Applied and Engineering Physics

Association Memberships

  • 日本分析化学会   

Published Papers

MISC

Industrial Property Rights

Research Grants & Projects

  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2016/04 -2019/03 
    Author : Takei Hiroyuki; Gölzhäuser Armin
     
    We aimed to develop a SERS system for in situ, simple and rapid detection of residual fungicides on agricultural produces by producing a flexible surface decorated by noble metal nano structures and transferring the fungicides by pressing the flexible surface onto the produce. To produce nano structures that can withstand the pressure during the transfer process, we used a galvanic displacement reaction of surface-adsorbed base metal nanoparticles upon exposure to AgNO3 solution. By controlling the size and thickness of the base metal, metal species and reaction temperature, we optimized the silver nano structure on basis of evaluation of SERS spectra of model compounds R6G and BPE. The optimized nano structure was grown on an adhesive tape, which was pressed against an orange treated with 1000 ppm ferbam. Two characteristic peaks at 551 and 1368 cm-1 were detected.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2011/04 -2014/03 
    Author : KASHIWADA Shosaku; TATSUTA Haruki; NAGASAKA Seiji; HIROTSU Naoki; SAKAMOTO Masaki; SHIMIZU Kazuya; TAKEI Hiroyuki; KATSUMATA Masakazu
     
    Minimum bactericidal concentration of silver nanocolloids (SNCs) to active sludge was 5 mg/L. Toxicities of SNCs to cyanobacteria and micro algae were comparatively high, in addition, nano-size dependent toxicity was observed. In case of SNCs exposure to aquatic plants, there was inhibition of roots growth because released Ag+ inhibited glutathione reductase and following increase of H2O2 in roots reduced catalase activity. There is no significant difference between SNCs and AgNO3 in acute mobility inhibition test of invertebrates. Main toxic factor in reproduction test of invertebrates was Ag+. In fish, it was observed that shortened body length, reduction of heart beating, ischemia and kyphosis were induced by SNCs exposure. SOD, CAT and GSH were significantly reduced, and apoptosis inhibition was observed. Moreover, intrinsic growth rate of fish was significantly decreased by SNCs exposure.

Teaching Experience

  • Bionanophotonics
    Toyo University
  • Life Science Seminar II
    Toyo University
  • physics laboratory course
    Toyo University
  • medical biotechnology
    Toyo University
  • Physics (electromagnetism)
    Toyo University
  • Physics (mechanics)
    Toyo University
  • Life Science English II
    Toyo University
  • Life Science Seminar
    Toyo University

Other link

researchmap