二つの改良デシケータ装置のホルムアルデヒド除去効果の比較

The former desiccator system (Type I) and the new desiccator system (Type II) for the measurement of the dew condensation and the relative humidity were produced, and the formaldehyde (FA) removal rates were compared between the two desiccator systems. Those experiments were performed in the early morning in winter when the dew condensation tends to occur. The dew condensation was observed in the Type I. In the Type II, passage of FA gas through the hygroscopic bottle containing a desiccant resulted in the prevention of the dew condensation and maintenance of humidity at about 50%. The FA removal rates by coffee powders, black tea leaves, and green tea leaves were higher using the Type II than with the Type I. The FA removal rate using the Type II was higher for used-tea leaves or coffee powders than with unused ones. In particular with green tea leaves, the FA removal rates increased with the frequency and time of decoction. These results suggest the superiority of the Type II to the Type I in the measurement of the FA removal rates with various adsorbents

マクロファージからのリポポリサッカライド誘導NO産生に対するAsp-hemolysin関連合成ペプチドP-21の影響

To clarify the effect of Asp-hemolysin-related synthetic peptide (P-21) on lipopolysaccharide (LPS)-induced nitric oxide (NO) production in murine peritoneal macrophages (Mφ) was demonstrated this study. P-21 inhibited LPS (from Escherichia coli O111 : B4) -induced NO production of Mφ in a dose-dependent manner. P-21 slightly effected on NO production induced by LPS from Klebsiella pneumonias in Mφ. The inhibition ability of the P-21 was influenced by differences of LPS from various strains. These results suggest that P-21 has effects on the bioactivity of LPS, such as NO production in Mφ

数種の内分泌攪乱化学物質のマウス腹腔マクロファージ細胞機能に及ぼす影響

We investegated the effects of nine possible endocrine disrupting chemicals (EDCs) on the nitric oxide (NO) production and growth of mouse peritoneal macrophages. Genistein and coumestrol inhibited lipopolysaccharide-induced NO production in macrophages, whereas other EDCs had no effect. In WST-8 assay, the growth of mouse macrophages was induced by 17β-estradiol, bisphenol A, nonylphenol, diethyl phthalete, genistein and daidzein. In addition, the cell viability of daidzein-treated macrophages was 1.7-fold increased as compared with non-treated macrophages. These results suggest that EDCs affect cellular function in macrophages

ホルムアルデヒドの吸着剤による除去効果を測定するための改良デシケータの製作と測定

We developed a new desiccator system by improving the conventional desiccator method and measured the FA-removal effects of adsorbents using this system. The improved desiccator system consists of: 1) a pump, 2) a flow meter, 3) a FA gas generator, 4) five connected desiccators, and 5) an exhaust. A more stable concentration of FA in the desiccators was obtained when they were connected in series rather than in parallel. The FA removal rate for 3 days for red tea in used tea bags, green tea, oolong tea, or powdered coffee was more than 80%, and the removal rates for 1 day by activated carbon from palm nutshells and silica gel, as commercially available chemical agents, were 100% and 75%, respectively. This improved desiccator system allows direct collection of air in the desiccator, and may have wide applications