Zobrazeno 1 - 10
of 324
pro vyhledávání: '"Kohji Mitsubayashi"'
Autor:
Kenta Ichikawa, Kenta Iitani, Gentaro Kawase, Koji Toma, Takahiro Arakawa, Dzung Viet Dao, Kohji Mitsubayashi
Publikováno v:
Sensors, Vol 24, Iss 5, p 1436 (2024)
Salivary turbidity is a promising indicator for evaluating oral hygiene. This study proposed a wearable mouthguard-type sensor for continuous and unconstrained measurement of salivary turbidity. The sensor evaluated turbidity by measuring the light t
Externí odkaz:
https://doaj.org/article/156e73f9305e432c90f2051e78cb97ca
Autor:
Takahiro Arakawa, Riki Ishikawa, Kenta Iitani, Koji Toma, Yasuhiko Iwasaki, Kohji Mitsubayashi
Publikováno v:
Biosensors and Bioelectronics: X, Vol 11, Iss , Pp 100169- (2022)
Volatile organic compounds contained in human volatiles are related to metabolism and disease. Measurement of these components is expected to enable non-invasive and simple metabolic evaluations and disease diagnoses. In particular, skin gas can be c
Externí odkaz:
https://doaj.org/article/9cef730813724a299e6f56ffce07a995
Autor:
Kenta Iitani, Hidehisa Mori, Kenta Ichikawa, Koji Toma, Takahiro Arakawa, Yasuhiko Iwasaki, Kohji Mitsubayashi
Publikováno v:
Sensors, Vol 23, Iss 13, p 5857 (2023)
The molecule 2-nonenal is renowned as the origin of unpleasant human aging-related body odor that can potentially indicate age-related metabolic changes. Most 2-nonenal measurements rely on chromatographic analytical systems, which pose challenges in
Externí odkaz:
https://doaj.org/article/4276580e747e4f7f98bc14e642fc460f
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-8 (2021)
Abstract Volatile organic compounds (VOCs) released through skin (transcutaneous gas) has been increasing in importance for the continuous and real-time assessment of diseases or metabolisms. For stable monitoring of transcutaneous gas, finding a bod
Externí odkaz:
https://doaj.org/article/302064baa19348bc824554419feb3989
Autor:
Hidekazu Matsumoto, Keisuke Tomoto, Gentaro Kawase, Kenta Iitani, Koji Toma, Takahiro Arakawa, Kohji Mitsubayashi, Keiji Moriyama
Publikováno v:
Sensors, Vol 23, Iss 11, p 5027 (2023)
In orthodontics, understanding the pressure of oral soft tissues on teeth is important to elucidate the cause and establish treatment methods. We developed a small wireless mouthguard (MG)-type device that continuously and unrestrainedly measures pre
Externí odkaz:
https://doaj.org/article/b7a31dc2579249f298b98ca7bd43418f
Publikováno v:
Chemosensors, Vol 9, Iss 9, p 258 (2021)
We constructed an imaging system to measure the concentration of acetone gas by acetone reduction using secondary alcohol dehydrogenase (S-ADH). Reduced nicotinamide adenine dinucleotide (NADH) was used as an electron donor, and acetone was imaged by
Externí odkaz:
https://doaj.org/article/4f7ebe2e7f1345249755e597c227ecbb
Autor:
Koji Toma, Kanako Iwasaki, Geng Zhang, Kenta Iitani, Takahiro Arakawa, Yasuhiko Iwasaki, Kohji Mitsubayashi
Publikováno v:
Sensors, Vol 21, Iss 14, p 4897 (2021)
Methanol (MeOH) in exhaled breath has potential for non-invasive assessment of intestinal flora. In this study, we have developed a biochemical gas sensor (bio-sniffer) for MeOH in the gas phase using fluorometry and a cascade reaction with two enzym
Externí odkaz:
https://doaj.org/article/37785d7bd97249b98c888806b37ba49d
Autor:
Po-Jen Chien, Takuma Suzuki, Ming Ye, Koji Toma, Takahiro Arakawa, Yasuhiko Iwasaki, Kohji Mitsubayashi
Publikováno v:
Sensors, Vol 20, Iss 23, p 6827 (2020)
Our groups have previously developed a biochemical gas sensor to measure isopropanol (IPA) in exhaled air and have applied it for breath IPA investigation in healthy subjects and diabetes patients. In this study, the original bio-sniffer was modified
Externí odkaz:
https://doaj.org/article/c5ddcf86a4e34eb2988d6bca2138c70b
Autor:
Kohji Mitsubayashi, Kazuyoshi Yano, Hirokazu Saito, Hiroyuki Kudo, Takahiro Arakawa, Tomoyuki Koshida, Kumiko Miyajima
Publikováno v:
Biosensors, Vol 3, Iss 1, Pp 120-131 (2013)
Dynamic fluoroimmunoassay with a flow-through system using optical fiber probes consisting of polystyrene was developed and applied to a quantitative detection of E. coli O157:H7. The system measures E. coli as fluorescence of sandwich-type immune co
Externí odkaz:
https://doaj.org/article/69f411617f814bd8927856c3b6483a15
Publikováno v:
Sensors, Vol 17, Iss 9, p 2145 (2017)
A rapid and reproducible fiber-optic immunosensor for Escherichia coli O157:H7 (E. coli O157:H7) was described. The biosensor consisted of a flow cell, an optical fiber with a thin Ni layer, and a PC linked fluorometer. First, the samples with E. col
Externí odkaz:
https://doaj.org/article/96385e6f16f246879220ebb49f9d3fde