Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Chikara Kadoya"'
Autor:
Chikara Kadoya, Yasuo Morimoto, Toshihiko Myojo, Akira Ogami, Takako Oyabu, Susumu Ueno, Kenichiro Nishi
Publikováno v:
Journal of Occupational Health
Objective Nickel oxide nanoparticles (NiONPs) are representative metal oxide NPs and are categorized as an insoluble nickel compound. Our previous studies suggested that NiONPs have more pulmonary toxicity than micron‐sized NiO because they may dis
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd5eb23c0e373dfffaa571a104d7359b
https://pubmed.ncbi.nlm.nih.gov/32959980
https://pubmed.ncbi.nlm.nih.gov/32959980
Publikováno v:
Journal of Occupational Health
Objective: Titanium dioxide nanoparticles are widely used as UV filters in cosmetics and as a photocatalyst. We evaluated pulmonary responses to different crystal forms of TiO2 nanoparticles. Methods: We used 4 different TiO2 samples with similar spe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::44383f625ec08dc9c90bff1f8cc34df8
http://europepmc.org/articles/PMC5373910
http://europepmc.org/articles/PMC5373910
Autor:
Isamu Tanaka, Toshihiko Myojo, Byeong-Woo Lee, Akira Ogami, Motoi Todoroki, Makoto Yamamoto, Yasuo Morimoto, Takako Oyabu, Kenichiro Nishi, Chikara Kadoya
Publikováno v:
Nanotoxicology. :1-10
The health risks of inhalation exposure to engineered nanomaterials in the workplace are a major concern in recent years, and hazard assessments of these materials are being conducted. The pulmonary surfactant of lung alveoli is the first biological
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1e55efe180f947e6903a3d305768c71c
https://doi.org/10.3109/17435390.2015.1039093
https://doi.org/10.3109/17435390.2015.1039093
Autor:
Motoi Todoroki, Makoto Yamamoto, Yasuo Morimoto, Takako Oyabu, Akira Ogami, Toshihiko Myojo, Kenichiro Nishi, Chikara Kadoya, Isamu Tanaka
Publikováno v:
Industrial Health. 50:31-36
Nickel oxide with two different particle sizes, micron size (NiO) and submicron size (nNiOm), as well as crystalline silica as a positive control and titanium dioxide as a negative control, were intratracheally instilled in rats and the phospholipid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4ca62ed5fb362f89a7cecaf8c3330d4e
https://doi.org/10.2486/indhealth.ms1253
https://doi.org/10.2486/indhealth.ms1253
Autor:
Shigehisa Endoh, Isamu Tanaka, Masahiro Murakami, Naohide Shinohara, Wei-Ning Wang, Manabu Shimada, Akira Ogami, Junko Nakanishi, Kunio Uchida, Takako Oyabu, Masami Hirohashi, Toshihiko Myojo, Makoto Yamamoto, Yasuo Morimoto, Kazuhiro Yamamoto, Kenichiro Nishi, Motoi Todoroki, Katsuhide Fujita, Chikara Kadoya
Publikováno v:
Inhalation Toxicology. 23:407-416
We evaluated the pulmonary pathological features of rats that received a single intratracheal instillation and a 4-week inhalation of a fullerene. We used fullerene C(60) (nanom purple; Frontier Carbon Co. Ltd, Japan) in this study. Male Wistar rats
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34865a8de8c1bf881d40b1bf76892d5d
https://doi.org/10.3109/08958378.2011.580386
https://doi.org/10.3109/08958378.2011.580386
Autor:
Byeong Woo Lee, Masayoshi Hashiba, Akira Ogami, Toshihiko Myojo, Takako Oyabu, Makoto Yamamoto, Yasuo Morimoto, Tatsunori Kambara, Yohei Mizuguchii, Motoi Todoroki, Kenichiro Nishi, Chikara Kadoya
Publikováno v:
Journal of UOEH. 33:163-171
It is necessary to consider protective measures, such as dust respirators, against the inhalation of nanoparticle aerosols. Industrial hygienists and workers handling nanomaterials are concerned about the filteration performance of dust respirators i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8e5620036ad2f8455ef855002e91650b
https://doi.org/10.7888/juoeh.33.163
https://doi.org/10.7888/juoeh.33.163
Autor:
Takako Oyabu, Masami Hirohashi, Yasuo Morimoto, Chikara Kadoya, Akira Ogami, Isamu Tanaka, Masahiro Murakami, Toshihiko Myojo, Kenichiro Nishi
Publikováno v:
Advanced Powder Technology. 21:507-512
Pulmonary health effects of fine particles and nanoparticles are overviewed in this paper, mainly based on the researches conducting in our laboratory. For the hazard assessment, we exposed rats to aerosolized asbestos-substitutes or nanoparticles ae
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e095d1dd393922162d11399e61c6dbde
https://doi.org/10.1016/j.apt.2010.05.004
https://doi.org/10.1016/j.apt.2010.05.004
Autor:
Shigehisa Endoh, Isamu Tanaka, Manabu Shimada, Akira Ogami, Masahiro Murakami, Sayumi Yamasaki, Takako Oyabu, Masami Hirohashi, Chikara Kadoya, Makoto Yamamoto, Yasuo Morimoto, Kenichiro Nishi, Motoi Todoroki, Toshihiko Myojo
Publikováno v:
Journal of Nanoparticle Research. 13:2063-2071
Fullerenes are interesting carbon nanomaterials with several forms of C60, C70, C76, and more molecules. However, little is known of the risk associated with their exposure. Inhalation is considered the most significant route of exposure to nanoparti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44fd25b1d654f614066cee325ae72bd7
https://doi.org/10.1007/s11051-010-9961-y
https://doi.org/10.1007/s11051-010-9961-y
Autor:
Kazuhiro Yamamoto, Makoto Yamamoto, Yasuo Morimoto, Kenichiro Nishi, Chikara Kadoya, Takako Oyabu, Toshihiko Myojo, Katsuhide Fujita, Akira Ogami, Sayumi Yamasaki, Masami Hirohashi, Motoi Todoroki, Kunio Uchida, Isamu Tanaka, Junko Nakanishi, Shigehisa Endo, Masahiro Murakami
Publikováno v:
Inhalation Toxicology. 21:1030-1039
Since nanoparticles easily agglomerate to form larger particles, it is important to maintain the size of their agglomerates at the nano-level to evaluate the harmful effect of the nanoparticles. We prevented agglomeration of nickel oxide nanoparticle
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::df8745fdf593f735e920819f5ba5b693
https://doi.org/10.1080/08958370802716722
https://doi.org/10.1080/08958370802716722
Autor:
Hiroshi Kasai, Takahiko Kasai, Masahiro Murakami, Makoto Yamamoto, Yasuo Morimoto, Kazuaki Kawai, Kenichiro Nishi, Toshihiko Myojo, Isamu Tanaka, Takako Oyabu, Akira Ogami, Masami Hirohashi, Chikara Kadoya, Motoi Todoroki
Publikováno v:
Inhalation Toxicology. 21:898-905
In order to evaluate the chronic effect of polymerized toner particles on the lung, inflammation- and fibrosis-related genes were analyzed and 8-hydroxydeoxyguanosine (8-OHdG) was examined by using the lung tissue of rats subjected to 24 months of to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::786ce92f2935a0a3376972661469875d
https://doi.org/10.1080/08958370802641938
https://doi.org/10.1080/08958370802641938