11 research outputs found

    EPS用モータのステータコア構造と巻線工法の考察

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    An Integrative Evaluation Method for the Biological Safety of Down and Feather Materials

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    Background: Down and feather materials have been commonly used and promoted as natural stuffing for warm clothing and bedding. These materials tend to become more allergenic as they become contaminated with microorganisms, in addition to being subjected to several kinds of chemical treatments. The biological or chemical contaminants in these materials pose a major risk to human health, to consumers and manufacturers alike. Here, we report the development of an integrative evaluation method for down and feather materials to assess bacterial contamination and in vivo toxicity. Methods: To assess bacterial contamination, we quantified 16S ribosomal RNA, performed culture tests, and established a conversion formula. To determine in vivo toxicity, we performed a zebrafish embryo toxicity testing (ZFET). Results: Washing the material appropriately decreases the actual number of bacteria in the down and feather samples; in addition, after washing, 16S rRNA sequencing revealed that the bacterial compositions were similar to those in rinse water. The ZFET results showed that even materials with low bacterial contamination showed high toxicity or high teratogenicity, probably because of the presence of unknown chemical additives. Conclusions: We established an integrative evaluation method for down and feather safety, based on bacterial contamination with in vivo toxicity testing

    Basic fibroblast growth factor (bFGF)の中枢神経を介する抗潰瘍作用と胃排出遅延作用

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    雑誌掲載版中枢に投与されたbFGFはTRHおよび水浸拘束ストレス潰瘍を抑制したこと,そして末梢にbFGFを投与した場合潰瘍形成に対して何ら影響が認められなかったことより,bFGFは中枢神経に作用して抗潰瘍作用を有することが明らかになっ

    食道胃接合部の中枢神経支配 アカラシアの病態に関する神経解剖学的考察

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    雑誌掲載版食道は疑核から,胃は迷走神経背側核からそれぞれ支配されているが,食道胃接合部は迷走神経背側核および疑核の複数部位からの神経支配を受けるという特徴を,神経解剖学的に明らかにすることができ

    中枢性basic fibroblast growth factor (bFGF)の胃潰瘍形成および胃排出機能に及ぼす影響

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    雑誌掲載版中枢のbFGFが胃潰瘍の形成および胃排出能に影響を及ぼすか否かについてWistar系雄性ラットを用いて検討した.bFGFの大槽内投与は用量依存性に水浸拘束ストレス潰瘍およびthyrotropin-releasing hormone潰瘍の発生を抑制した.同量を末梢に投与しても抗潰瘍作用は認められなかった.bFGFの胃排出に及ぼす影響をphenol red法を用いて調べたことろ,bFGFの大槽内投与では胃排出能を用量依存性に抑制した.しかし,同量を末梢に投与しても胃排出能には影響がみられなかった.bFGFは中枢神経系においてneuromodulatorとして胃潰瘍の形成や胃排出の調節に関与するものと考え
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