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Shimizu, Tomoko K.,Jung, Jaehoon,Otani, Tetsuya,Han, Young-Kyu,Kawai, Maki,Kim, Yousoo American Chemical Society 2012 ACS NANO Vol.6 No.3
<P>A two-dimensional fluorinated fullerene (C<SUB>60</SUB>F<SUB>36</SUB>) superstructure has been successfully formed on Au(111) and was investigated using scanning tunneling microscopy (STM) and density functional theory calculations. Although there exist three isomers (<I>C</I><SUB>3</SUB>, <I>C</I><SUB>1</SUB>, and <I>T</I>) in our molecular source, STM images of the molecules in the well-ordered region all appear identical, with 3-fold symmetry. This observation together with the differences in the calculated lowest unoccupied molecular orbital (LUMO) distribution among the three isomers suggests that a well-ordered monolayer consists of only the <I>C</I><SUB>3</SUB> isomer. Because of the strong electron-accepting ability of C<SUB>60</SUB>F<SUB>36</SUB>, the adsorption orientation can be explained by localized distribution of its LUMO, where partial electron transfer from Au(111) occurs. Intermolecular C–F···π electrostatic interactions are the other important factor in the formation of the superstructure, which determines the lateral orientation of C<SUB>60</SUB>F<SUB>36</SUB> molecules on Au(111). On the basis of scanning tunneling spectra obtained inside the superstructure, we found that the LUMO is located at 1.0 eV above the Fermi level (<I>E</I><SUB>F</SUB>), while the highest occupied molecular orbital (HOMO) is at 4.6 eV below the <I>E</I><SUB>F</SUB>. This large energy gap with the very deep HOMO as well as uniform electronic structure in the molecular layer implies a potential for application of C<SUB>60</SUB>F<SUB>36</SUB> to an electron transport layer in organic electronic devices.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2012/ancac3.2012.6.issue-3/nn300064x/production/images/medium/nn-2012-00064x_0009.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn300064x'>ACS Electronic Supporting Info</A></P>
Shimizu Tomoko,Kanai Chiaki,Ueda Keisuke,Asakawa Yasuyoshi 대한재활의학회 2023 Annals of Rehabilitation Medicine Vol.47 No.5
Objective: To examine activities of daily living (ADL) and physical activity in older adults with heart failure admitted to a rehabilitation ward for subacute musculoskeletal disease.Methods: This study included patients with musculoskeletal disease (aged ≥75 years) who were admitted to the rehabilitation ward. Data on age, ADL, and time for physical activity (metabolic equivalents [METs]) were collected. Patients were divided into groups with or without heart failure, and the differences were compared using Mann–Whitney U-test.Results: This study included 84 musculoskeletal patients, including 25 with heart failure. The heart-failure group had similar levels of ADL independence compared to the without-heart-failure group (p=0.28) but had shorter duration of continuous and sustained physical activities and less total time (p<0.01) of light-intensity physical activity or higher.Conclusion: Older adults with subacute musculoskeletal disease with heart failure do not necessarily require a large amount of physical activity to maintain ADL at the time of discharge. But very low physical activity may increase the risk for developing hospitalization-associated disability. Physical activity in older adults with subacute musculoskeletal disease with heart failure should be monitored separately from ADL.
Effects of Stress on Mouse β-Defensin-3 Expression in the Upper Digestive Mucosa
Rie Kawashima,Keiichi Tsukinoki,Tomoko Shimizu,Masahiro To,Juri Saruta,Yoshinori Jinbu,Mikio Kusama 연세대학교의과대학 2014 Yonsei medical journal Vol.55 No.2
Purpose: Gastrointestinal integrity and immune surveillance are affected by stress. Stress also adversely affects mucosal barrier function. β-defensins constitute an integralcomponent of the innate immune system as antimicrobial peptides, serving as the first line of defense against microbial pathogens at the epithelial surfaces of the upper digestive mucosa. The primary objective of this study was to determine the effects of stress on the expression profile of mouse β-defensin-3 in the upper digestivemucosa of mice with diabetes. Materials and Methods: We established a mouse model of restraint stress by using NSY/Hos mice with type 2 diabetes mellitus. We used real-time polymerase chain reaction, in situ hybridization, and immunohistochemistryto investigate the effects of stress and glucocorticoid administrationon mouse β-defensin-3 expression in the upper digestive mucosa of the gingiva, esophagus, and stomach. Results: Mouse β-defensin-3 mRNA expression was higher in the esophagus than in the gingiva or stomach (p<0.05). In the esophagus, mouse β-defensin-3 mRNA expression was lower in stressed mice than in non-stressed mice (p<0.05). Furthermore, immunoreactivity to mouse β-defensin-3 proteinwas lower in the esophagus of stressed mice than non-stressed mice, consistent with the results of mRNA expression analysis. Systemic glucocorticoid administrationalso downregulated esophageal mouse β-defensin-3 mRNA expression. Conclusion:Our novel findings show that stress decreases mouse β-defensin-3 expressionin the esophagus of mice with diabetes, possibly due to increased endogenous glucocorticoid production. It appears to be highly likely that stress management may normalize mucosal antimicrobial defenses in patients with diabetes.
Strong Enhancement of Superconductivity in Inorganic Electride 12CaO·7Al2O3:e− under High Pressure
Shigeki Tanaka,Tomoki Kato,Atsushi Miyake,Tomoko Kagayama,Katsuya Shimizu,Sung Wng Ki,Satoru Matsuishi,Hideo Hosono 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.3
We present the results of the pressure dependence of the superconductivity of the inorganicelectride 12CaO·7Al2O3:e− (C12A7:e−) single crystal through the ac-susceptibility measurementunder high pressure. C12A7:e− has the cage structure and the density of states derived fromthe cages may play an important role in the superconductivity. The superconducting transitiontemperature (Tc) is 0.2 K at ambient pressure and monotonically increases up to 1.79 K at4.7 GPa. The upper critical field Hc2 and −dHc2/dT at Tc, in proportion to the density of states(DOS) at Fermi energy becomes larger under high pressure. The superconductivity in C12A7:e− ismediated by the electron-phonon interaction, and the increase of Tc with pressure may arise froma peak structure of the DOS of cage conduction band.