An evaluation test of influence to autonomic nervous by inhalation of the fragrances - An evaluation test of influence to autonomic nervous by inhalation of the fragrances

开始日期2019-09-09

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Mitsui Norin Co., Ltd.

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146

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2023-10-31·Journal of Nutritional Science and Vitaminology

The Effects of Black Tea Consumption on Intestinal Microflora—A Randomized Single-Blind Parallel-Group, Placebo-Controlled Study

Article

作者: Tanaka, Yuko ; Suzuki, Masayuki ; Tomioka, Reno ; Ebihara, Shukuko

We previously reported that black tea consumption for 12 wk reduced the risk of acute upper respiratory tract inflammation, and improved secretory capacity in individuals with low salivary SIgA levels (Tanaka Y et al. 2021. Jpn Pharmacol Ther 49: 273-288). These results suggested that habitual black tea consumption improves mucosal immunity. Therefore, in this study we evaluated the effect of black tea intake on gut microbiota, which is known to be involved in mucosal immunity, by analyzing the bacterial flora and the short-chain fatty acids (SCFAs) concentration of feces collected during the above clinical study. The clinical design was a randomized, single-blind, parallel-group, placebo-controlled study with 72 healthy Japanese adult males and females, who consumed three cups of black tea (Black Tea Polymerized Polyphenols 76.2 mg per day) or placebo per day for 12 wk. In all subjects intake of black tea significantly increased abundance of Prevotella and decreased fecal acetic acid concentration. Particularly in the subjects with low salivary SIgA levels, the change over time of total bacteria, Prevotella, and butyrate-producing bacteria, which are involved in normalizing immune function, were higher in the black tea group than in the placebo group. In subjects with low abundance of Flavonifractor plautii a butyrate-producing bacteria, black tea consumption significantly increased salivary SIgA concentration and the absolute number of Flavonifractor plautii. In conclusion, our results suggest that improvement of mucosal immunity via an increase in butyrate-producing bacteria in the gut may partly contribute to the suppressive effect of black tea consumption on acute upper respiratory tract inflammation observed in our previous report.

2023-10-01·International journal of systematic and evolutionary microbiology

Proposal of a novel subspecies: Alicyclobacillus hesperidum subspecies aegles.

Article

作者: Mochida, Kaoru ; An, Sun-Young ; Morohoshi, Sho ; Goto, Keiichi ; Kato-Tanaka, Yuko ; Yasui, Kazuki ; Kasai, Hiroaki ; Yokota, Akira ; Fujii, Taichi

Alicyclobacillus sp. DSM 11985^T was isolated from geothermal soil but had not yet been classified at the species level. The strain produced guaiacol, which is of interest from the viewpoint of food spoilage in the food industry. 16S rRNA gene sequence analysis revealed that strain DSM 11985^T was closely related (99.6 % similarity) to Alicyclobacillus hesperidum DSM 12489^T. However, strains of A. hesperidum did not produce guaiacol; therefore, we performed the taxonomic characterization of strain DSM 11985^T. The results showed that strain DSM 11985^T and strains of A. hesperidum showed different phenotypic characteristics in biochemical/physiological tests including guaiacol production. Average nucleotide identity values between strain DSM 11985^T and strain DSM 12489^T were 95.4-95.9 %, and the in silico DNA-DNA hybridization value using the Genome-to-Genome Distance Calculator between strains DSM 11985^T and DSM 12489^T was 65.5 %. These values showed that strain DSM 11985^T was genetically closely related but separated from strains of A. heparidum. From the above results, a novel subspecies of A. hesperidum, named Alicyclobacillus hesperidum subsp. aegles subsp. nov. is proposed. The type strain is DSM 11985^T (=FR-12^T=NBRC 113041^T).

2023-01-25·Journal of Japan Association on Odor Environment

Effects of hotrienol, a characteristic aroma compound in second flush Darjeeling tea on sleep

作者: YADA, Yukihiro ; OHNO, Atsuko

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