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RISS 인기검색어
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- 저자 : Morita Yasunari (검색결과 3 건)
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Iwahashi, Takashi,Ishiyama, Tatsuya,Sakai, Yasunari,Morita, Akihiro,Kim, Doseok,Ouchi, Yukio The Royal Society of Chemistry 2015 Physical chemistry chemical physics Vol.17 No.38
<P>IR-visible sum-frequency generation (IV-SFG) vibrational spectroscopy and a molecular dynamics (MD) simulation were used to study the local layering order at the interface of 1-butanol-d<SUB>9</SUB> and 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim]PF<SUB>6</SUB>), a room-temperature ionic liquid (RTIL). The presence of a local non-polar layer at the interface of the two polar liquids was successfully demonstrated. In the SFG spectra of 1-butanol-d<SUB>9</SUB>, we observed significant reduction and enhancement in the strength of the CD<SUB>3</SUB> symmetric stretching (<I>r</I><SUP>+</SUP>) mode and the antisymmetric stretching (<I>r</I><SUP>−</SUP>) mode peaks, respectively. The results can be well explained by the presence of an oppositely oriented quasi-bilayer structure of butanol molecules, where the bottom layer is strongly bound by hydrogen-bonding with the PF<SUB>6</SUB><SUP>−</SUP> anion. MD simulations reveal that the hydrogen-bonding of butanol with the PF<SUB>6</SUB><SUP>−</SUP> anion causes the preferential orientation of the butanols; the restriction on the rotational distribution of the terminal methyl group along their <I>C</I><SUB>3</SUB> axis enhances the <I>r</I><SUP>−</SUP> mode. As for the [bmim]<SUP>+</SUP> cations, the SFG spectra taken within the CH stretch region indicate that the butyl chain of [bmim]<SUP>+</SUP> points away from the bulk RTIL phase to the butanol phase at the interface. Combining the SFG spectroscopy and MD simulation results, we propose an interfacial model structure of layering, in which the butyl chains of the butanol molecules form a non-polar interfacial layer with the butyl chains of the [bmim]<SUP>+</SUP> cations at the interface.</P> <P>Graphic Abstract</P><P>IV-SFG vibrational spectroscopy and MD simulation studies reveal a local polar/nonpolar layering structure at the interface of 1-butanol-d<SUB>9</SUB> and 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim]PF<SUB>6</SUB>). <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c5cp03307a'> </P>
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Watanabe Shinichi,Iida Yuki,Hirasawa Jun,Naito Yuji,Mizutani Motoki,Uemura Akihiro,Nishimura Shogo,Suzuki Keisuke,Morita Yasunari 대한재활의학회 2023 Annals of Rehabilitation Medicine Vol.47 No.3
Objective: To investigate the effect on early mobilization in patients undergoing extra-corporeal membrane oxygenation (ECMO) and acute blood purification therapy in the intensive care unit (ICU).Methods: We conducted this multicenter retrospective cohort study by collecting data from six ICUs in Japan. Consecutive patients who were admitted to the ICU, aged ≥18 years, and received mechanical ventilation for >48 hours were eligible. The analyzed were divided into two groups: ECMO/blood purification or control group. Clinical outcomes; time to first mobilization, number of total ICU rehabilitations, mean and highest ICU mobility scale (IMS); and daily barrier changes were also investigated.Results: A total of 204 patients were included in the analysis, 43 in the ECMO/blood purification group and 161 in the control group. In comparison of clinical outcome, the ECMO/blood purification group had a significantly longer time to first mobilization: ECMO/blood purification group 6 vs. control group 4 (p=0.003), higher number of total ICU rehabilitations: 6 vs. 5 (p=0.042), lower mean: 0 vs. 1 (p=0.043) and highest IMS: 2 vs. 3 (p=0.039) during ICU stay. Circulatory factor were most frequently described as barriers to early mobilization on days 1 (51%), 2 (47%), and 3 (26%). On days 4 to 7, the most frequently described barrier was consciousness factors (21%, 16%, 19%, and 21%, respectively)Conclusion: The results of this study comparing the ECMO/blood purification group and the untreated group in the ICU showed that the ECMO/blood purification group had significantly longer days to mobilization and significantly lower mean and highest IMS.
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Watanabe Shinichi,Liu Keibun,Kozu Ryo,Yasumura Daisetsu,Yamauchi Kota,Katsukawa Hajime,Suzuki Keisuke,Koike Takayasu,Morita Yasunari 대한재활의학회 2023 Annals of Rehabilitation Medicine Vol.47 No.6
Objective: To examine the association between the mobilization level during intensive care unit (ICU) admission and independence in activity of daily living (ADL), defined as Barthel Index (BI)≥70. Methods: This was a post-hoc analysis of the EMPICS study involving nine hospitals. Consecutive patients who spend >48 hours in the ICU were eligible for inclusion. Mobilization was performed at each hospital according to the shared protocol and the highest ICU mobility score (IMS) during the ICU stay, baseline characteristics, and BI at hospital discharge. Multiple logistic regression analysis, adjusted for baseline characteristics, was used to deter-mine the association between the highest IMS (using the receiver operating characteristic [ROC]) and ADL. Results: Of the 203 patients, 143 were assigned to the ADL independence group and 60 to the ADL dependence group. The highest IMS score was significantly higher in the ADL independence group than in the dependence group and was a predictor of ADL independence at hospital discharge (odds ratio, 1.22; 95% confidence interval, 1.07–1.38; adjusted p=0.002). The ROC cutoff value for the highest IMS was 6 (specificity, 0.67; sensitivity, 0.70; area under the curve, 0.69). Conclusion: These results indicate that, in patients who were in the ICU for more than 48 hours, that patients with good function in the ICU also exhibit good function upon discharge. However, prospective, multicenter trials are needed to confirm this conclusion.
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