Publications by authors named "Keiichiro Kimura"
Context: We previously reported that monoclonal mouse immunoglobulin (Ig) A, OA-4, attenuates sensitization in mice by suppressing B cell activation.
Objective: Here, it is demonstrated for the first time that mouse IgA inhibits mouse B cell activation under natural conditions (i.e.
Article Synopsis
- Three types of phytoplankton (Microcystis aeruginosa, Staurastrum dorcidentiferum, and Cryptomonas ovata) were cultivated to study the impact of dissolved organic matter (DOM) they release on organic pollution in Lake Biwa.
- A significant concentration of low molecular weight DOM was found during cultivation, indicating that the phytoplankton contribute to the overall organic matter in the lake, particularly certain fluorescence peaks associated with DOM.
- The research showed that Cryptomonas ovata produced the most algal DOM per cell, suggesting that changes in the dominant phytoplankton species could influence the levels of refractory organic matter present in Lake Biwa.
Article Synopsis
- The study investigated how dissolved organic matter (DOM) from the phytoplankton Microcystis aeruginosa contributes to the organic pollution in Lake Biwa.
- Two significant fluorescence peaks (peak 2 and peak 3) found in the algal DOM during cultivation matched those in Lake Biwa's surface water, indicating a notable impact on the lake's refractory organic matter.
- The study also identified different fluorescence characteristics of the DOM, including fulvic-like and protein-like peaks, suggesting that while algal-derived DOM resembles soil fulvic acid, it mainly has hydrophilic properties.
Highly sensitive and specific determination of trace amounts of a polymeric hindered amine light stabilizer (HALS) in polypropylene (PP) materials could be established by improving reactive thermal desorption-gas chromatography (RTD-GC) in the presence of an organic alkali, tetramethylammonium hydroxide. By using nitrogen-phosphorus detection, highly selective detection of the HALS-related components was attained. In addition, the use of a polar poly(ethylene glycol) separation column alleviated the adsorption of minor specific pyrolysis products.
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