Výsledky vyhledávání - "Naoyuki SEKIOKA"

Direct electrochemical detection of DNA methylation for retinoblastoma and CpG fragments using a nanocarbon film

Autor: Keisuke Goto, Dai Kato, Shigeru Hirono, Akio Ueda, Osamu Niwa, Naoyuki Sekioka

Publikováno v: Analytical Biochemistry. 405:59-66

We describe the direct electrochemical detection of DNA methylation in relatively long sequences by using a nanocarbon film electrode. The film was formed by employing the electron cyclotron resonance sputtering method and had a nanocrystalline sp(2)

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::49379310082f1ca665ed273b22bb868f
https://doi.org/10.1016/j.ab.2010.06.004

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Fabrication of electrochemically stable fluorinated nano-carbon film compared with other fluorinated carbon materials

Autor: Hiroshi Uetsuka, Shigeru Hirono, Shigeru Umemura, Tomoyuki Kamata, Osamu Niwa, Naoyuki Sekioka, Dai Kato, Yoshiyuki Hattori, Akio Ueda, Ryoji Kurita

Publikováno v: Carbon. 47:1943-1952

We fabricated electrochemically stable fluorinated nano-carbon film that had an sp2 and sp3 hybrid nanocrystalline structure formed using the electron cyclotron resonance (ECR) sputtering method. This fluorinated ECR (F-ECR) nano-carbon film prepared

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::aba45facf95842712ad264eb3dfe70e9
https://doi.org/10.1016/j.carbon.2009.03.041

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Bioelectrochemical conversion of urea to nitrogen using aminated carbon electrode

Autor: Hideki Nishi, Shunichi Uchiyama, Hiroaki Watanabe, Xiuyun Wang, Naoyuki Sekioka, Hiroshi Hamana

Publikováno v: Journal of Environmental Sciences. 21:S96-S99

Urea decomposes to ammonia and carbon dioxide via carbamic acid, and amine groups can be introduced to the glassy carbon electrode surface during the electrode oxidation of carbamic acid. This modified carbon electrode has excellent catalytic activit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2887e03c7aaf643073c00c77735b9ee1
https://doi.org/10.1016/s1001-0742(09)60047-4

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Controllable electrode activities of nano-carbon films while maintaining surface flatness by electrochemical pretreatment

Autor: Naoyuki Sekioka, Shigeru Umemura, Osamu Niwa, Akio Ueda, Ryoji Kurita, Tomoyuki Kamata, Shigeru Hirono, Dai Kato

Publikováno v: Carbon. 46:1918-1926

A carbon film consisting nanocrystallites with mixed sp2 and sp3 bonds formed by using the electron cyclotron resonance (ECR) sputtering method was studied with respect to the changes in characteristics caused by electrochemical pretreatment (ECP). U

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5de5da574eeadfc6000f3f9bbef56e74
https://doi.org/10.1016/j.carbon.2008.08.006

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Simultaneous On-chip Surface Plasmon Resonance Measurement of Disease Marker Protein and Small Metabolite

Autor: Naoyuki Sekioka, Ryoji Kurita, Kohei Nakamoto, Osamu Niwa

Publikováno v: ECS Transactions. 16:61-66

Disease marker protein and a correction marker were simultaneously measured in a poly-dimethylsiloxane based microchannel. Two gold films in the microchannel were modified with antibody and redox polymer containing horseradish peroxidase (HRP). Creat

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c260bbfeceaa4ed0cb4d06a357504d4e
https://doi.org/10.1149/1.2981105

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Improved detection limit for an electrochemical γ-aminobutyric acid sensor based on stable NADPH detection using an electron cyclotron resonance sputtered carbon film electrode

Autor: Shigeru Hirono, Dai Kato, Naoyuki Sekioka, Osamu Niwa, Ryoji Kurita

Publikováno v: Sensors and Actuators B: Chemical. 129:442-449

We report an electrochemical γ-aminobutyric acid (GABA) sensor with an improved detection limit based on stable β-nicotinamide adenine dinucleotide phosphate (NADPH) oxidation with an extremely low background current using an electron cyclotron res

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::78451e626954b81d20ce4a0a599777c9
https://doi.org/10.1016/j.snb.2007.08.040

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Amperometric Urea Biosensor Using Aminated Glassy Carbon Electrode Covered with Urease Immobilized Carbon Sheet, Based on the Electrode Oxidation of Carbamic Acid

Autor: Naoyuki Sekioka, Shunichi Uchiyama, Hiroaki Watanabe, Hiroshi Hamana, Xiuyun Wang

Publikováno v: Electroanalysis. 19:1300-1306

A large oxidation current can be observed when ammonium carbamate aqueous solution is electrolyzed using a glassy carbon electrode (GCE) at a potential exceeding 1.0 V vs. Ag/AgCl and amino groups are introduced at the surface of the GCE. Aminated GC

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cd08d1bebcf73aa548309e0785a6aa9f
https://doi.org/10.1002/elan.200603853

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Estimation of Coupling Rate Constant ofL-Cysteine Radical Studied by Concentration-Step Coulometry Using Porous Carbon Felt Electrode Impregnated with an Electrolyte

Autor: Shunichi Uchiyama, Naoyuki Sekioka

Publikováno v: Electroanalysis. 17:2052-2056

Controlled potential coulometry using carbon felt electrode impregnated with electrolytic solution realizes very rapid complete electrolysis and can be used to measure the faster reaction rate constant than that using conventional electrolytic cell.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::72c446b67fde36f8c79cd4373593197e
https://doi.org/10.1002/elan.200403330

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