Articles by Shiori Kawamura in JoVE
In Situ Syntes av guld nanopartiklar utan aggregering i mellanskiktet Space of Layered Titanate transparenta filmer Kazuhisa Sasaki1, Kazuki Matsubara1, Shiori Kawamura1, Kenji Saito1, Masayuki Yagi1, Tatsuto Yui1 1Department of Material Science and Technology, Faculty of Engineering, Niigata University Här presenterar vi ett protokoll för in situ-syntes av guldnanopartiklar (AuNPs) inom mellanskiktet loppet av skiktade titanate filmer utan sammanläggning av AuNPs. Ingen spektral förändring observerades även efter 4 månader. Den syntetiserade materialet har väntat tillämpningar inom katalys, fotokatalys, och utvecklingen av kostnadseffektiva plasmoniska enheter.
Other articles by Shiori Kawamura on PubMed
Why Food-poisoning Bacteria Attached to Shredded Cabbage Are Not Efficiently Disinfected by Sodium Hypochlorite (NaClO) Bioscience, Biotechnology, and Biochemistry. 2013 | Pubmed ID: 23748784 The aim of this study was to determine why food poisoning bacteria attached to cut cabbage are not efficiently disinfected by sodium hypochlorite (NaClO). Pretreatment of shredded cabbage with diethyl ether definitely decreased the survival numbers of Escherichia coli O157:H7 and Salmonella spp. after disinfection with 100 ppm of NaClO. The density of E. coli O157:H7 at the cut edge of a cabbage section was larger than that on the surface. The residual ratio of attached bacteria at the cut edge after NaClO disinfection was significantly higher than that on the surface. Microscopical observation indicated that the cut edge of shredded cabbage pretreated with diethyl ether was almost closed, resulting in a decrease in bacterial infiltration. Pretreatment of shredded cabbage with a higher concentration of NaClO to penetrate it more deeply significantly decreased the numbers of surviving bacteria after NaClO disinfection. Based on these results, we concluded that the bacteria attached to cut cabbage were not efficiently disinfected by NaClO, because not enough NaClO deeply infiltrated into the cut edges, and hence not enough came in contact with the bacteria.
Identifying Patients at High Risk of Heparin-induced Thrombocytopenia-associated Thrombosis with a Platelet Activation Assay Using Flow Cytometry Thrombosis and Haemostasis. Oct, 2016 | Pubmed ID: 27734072 To diagnose heparin-induced thrombocytopenia (HIT), detection of platelet-activating antibodies (HIT antibodies) is crucial. However, serum platelet activation profiles vary across patients and depend on test conditions. We evaluated the association between clinical outcomes and platelet-activating profiles assessed by a platelet microparticle assay (PMA), which detects activation of washed platelets induced by HIT antibodies, in 401 consecutive patients clinically suspected of having HIT. We made modifications to the assay, such as donor selection for washed platelets that increased sensitivity. Serum that activated platelets at a therapeutic (but not high) heparin concentration was defined as positive. Of these, serum that activated platelets within 30 minutes or in the absence of heparin was defined as strongly positive. The remaining samples were considered weakly positive. As a result, 97 % and 93 % of patients who tested strongly and weakly positive had clinical profiles consistent with HIT, respectively. The incidence of thromboembolic events (TEEs) after heparin exposure in patients who tested strongly positive, weakly positive, and negative was 61 %, 40 %, and 29 %, respectively. Among patients who did not experience a TEE on the day HIT was suspected, there was no significant difference in the cumulative incidence of subsequent TEEs between patients who tested strongly and weakly positive when argatroban was initiated on the same day (19.0 % vs 7.1 %, p=0.313), but there was a significant difference when argatroban therapy was delayed by one or more days (61.1 % vs 17.6 %, p=0.007). The modified PMA is effective in diagnosing HIT and identifying patients at high risk for HIT-associated TEEs.