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Genetic Characterization of Streptococcus pyogenes emm89 Strains Isolated in Japan From 2011 to 2019

Infectious Microbes & Diseases 2020年第4期2卷 160-166页

作者： yujiro Hirose Masaya Yamaguchi Norihiko Takemoto Tohru Miyoshi-Akiyama Tomoko Sumitomo Masanobu Nakata Tadayoshi Ikebe Tomoki Hanada Takahiro Yamaguchi Ryuji Kawahara Rumi Okuno Hitoshi Otsuka Yuko Matsumoto yuji terashima Yu Kazawa Noriko Nakanishi Kaoru Uchida Yumi Akiyama Kaori Iwabuchi Chikara Nakagawa Kazunari Yamamoto Victor Nizet Shigetada Kawabata Department of Oral and Molecular Microbiology Osaka University Graduate School of DentistrySuitaOsakaJapan Department of Pediatrics University of California at San Diego School of MedicineLa JollaCAUSA Department of Infectious Diseases Research InstituteNational Center for Global Health and MedicineTokyoJapan Department of Oral Microbiology Kagoshima University Graduate School of Medical and Dental SciencesKagoshimaJapan Department of Bacteriology I National Institute of Infectious DiseasesTokyoJapan Division of Microbiology Osaka Institute of Public HealthOsaka CityOsakaJapan Department of Microbiology Tokyo Metropolitan Institute of Public HealthTokyoJapan Department of Public Health Sciences Yamaguchi Prefectural Institute of Public Health and Environment Yamaguchi CityYamaguchiJapan Microbiological Testing and Research Division Yokohama City Institute of Public HealthYokohamaKanagawaJapan Department of Microbiology Fukushima Prefectural Institute of Public HealthFukushima CityFukushimaJapan Department of Infectious Diseases Kobe Institute of HealthKobeHyogoJapan Department of Bacteriology Toyama Institute of HealthImizuToyamaJapan Infectious Disease Research Division Hyogo Prefectural Institute of Public Health ScienceKakogawaHyogoJapan Department of Health Science Iwate Prefectural Research Institute for Environmental Sciences and Public HealthMoriokaIwateJapan Division of Microbiology Kyoto City Institute of Health and Environmental SciencesKyoto CityKyotoJapan Niigata City Institute of Public Health and the Environment Niigata CityNiigataJapan Skaggs School of Pharmaceutical Sciences University of California at San DiegoLa JollaCAUSA.

Invasive infection caused by Streptococcus pyogenes emm89 strains has been increasing in several countries linked to a recently emergent clade of emm89 strains,designated clade *** Japan,the features of emm89 *** strains,such as clade classification,remains *** this study,we collected emm89 strains isolated from both streptococcal toxic shock syndrome(STSS)(89 STSS isolates)and noninvasive infections(72 non-STSS isolates)in Japan from 2011 to 2019,and conducted wholegenome sequencing and comparative analysis,which resulted in classification of a large majority into clade 3 regardless of disease *** addition,invasive disease-associated factors were found among emm89 strains,including mutations of control of virulence sensor,and absence of the hylP1 gene encoding *** findings provide new insights into genetic features of emm89 strains.

关键词： clade 3 emm89 streptococcal toxic shock syndrome Streptococcus pyogenes

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Tool feed rate optimization for smoothening of cutting force in end milling

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材料与冶金学报 2010年第4期9卷 296-299页

作者： yuji NINOMIYA Hisataka TANAKA Masahiko SATO Susumu OKAMURA Kazuma terashima Department of Mechanical and Aerospace Engineering Tottori University Japan Department of Mechanical Engineering Tottori University Japan

This paper deals with the tool feed rate optimization for smoothening of cutting force in end milling of workpiece with corner and straight parts. There is a difference between the cutting force in a corner part cutting and that in a straight part cutting. The cause of this is due to the difference in the instantaneous depths of cut in both cuttings. The scheme of this study is to prevent the generation of excessive cutting force in the corner part machining by comparison with the straight part machining. By dividing the NC (Numerical Control) cutting path of the corner part and changing the tool feed rate in each division, the cutting force in the corner part has been controlled. Furthermore, the possibility of realization of a shortening in machining time has been examined.

关键词： end milling tool feed rate cutting force curved surface optimization

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