Surface-induced fragmentation of higher fullerenes and endohedral metallofullerenes

We report the first results of surface collisions of pure hollow fullerenes (C_60, C_70 and C_78) and endohedral metallofullerenes (Y@C_82, Ca@C_82 and Ca@C_84), isolated by liquid chromatography, against solid (silicon and gold) surfaces and self-assembled monolayer (SAM) films. The experiments have been performed by a reflectron type time-of-flight mass spectrometer modified for measuring surface-induced dissociation (SID) spectra. No surface-induced fragment is observed for the surface collisions with the solid surfaces and the alkanethiolate SAM film. In contrast, sequential C_2-loss fragments have been observed for the surface collisions of hollow fullerenes and Ca@C_84 with the fluorinated SAM film.journal articl

第2回 外国人児童生徒・グローバル教育推進協議会報告

一般雑誌記事 / Articlearticl

Analysis of notch effect on the fracture behaviour of granite and limestone: An approach from the Theory of Critical Distances

This paper presents the analysis of the notch effect on granite and limestone fracture specimens. The research is based on the results obtained in an experimental programme composed of 84 fracture specimens, combining the two materials and 7 different notch radii varying from 0.15 mm up to 10 mm. The notch effect is analysed through the evolution of the apparent fracture toughness and the application of the Theory of the Critical Distances. The results reveal a significant notch effect in the limestone, whereas the notch effect in the granite is negligible for the range of notch radii analysed. Both observations are justified by the corresponding critical distance of the material

Proposal of education materials for learning a desired science using a Questionnaire

We carried out a questionnaire survey to clarify the interesting engineering field (mechatronics technologies) for schoolchild. Regardless of gender, more than 60% of them expressed their interest in robot construction. We also propose an education material of robot construction for learning a desired science.departmental bulletin pape

Improved measurement of CP-violation parameters sin⁡2ϕ1 and |λ|, B meson lifetimes, and B0-B̅0 mixing parameter Δmd

journal articl

献辞

application/pdf來生新教授退職記念号departmental bulletin pape

Microscale Sensing of Oxygen via Encapsulated Porphyrin Nanofibers: Effect of Indicator and Polymer “Core” Permeability

Biomimetic polymer nanofibers integrate sensing capabilities creating utility across many biological and biomedical applications. We created fibers consisting of either a poly­(ether sulfone) (PES) or a polysulfone (PSU) core coated by a biocompatible polycaprolactone (PCL) shell to facilitate cell attachment. Oxygen sensitive luminescent probes Pt­(II) <i>meso</i>-tetra­(pentafluorophenyl)­porphine (PtTFPP) or Pd­(II) <i>meso</i>-tetra­(pentafluorophenyl)­porphine (PdTFPP), were incorporated in the core via single-step coaxial electrospinning providing superior sensitivity, high brightness, linear response, and excellent stability. Both PES–PCL and PSU–PCL fibers provide more uniform probe distribution than polydimethylsiloxane (PDMS). PSU-based sensing fibers possessed optimum sensitivity due to their relatively higher oxygen permeability. During exposure to 100% nitrogen and 100% oxygen, PES–PCL fiber displayed an <i>I</i>₀/<i>I</i>₁₀₀ value of 6.7; PSU–PCL exhibited a value of 8.9 with PtTFPP as the indicator. In contrast, PdTFPP-containing fibers possess higher sensitivity due to the long porphyrin lifetime. The corresponding <i>I</i>₀/<i>I</i>₁₀₀ values were 80.6 and 106.7 for the PES–PCL and PSU–PCL matrices, respectively. The response and recovery times were 0.24/0.39 s for PES–PCL and 0.38/0.83 s for PSU–PCL which are 0.12 and 0.11 s faster, respectively, than the Pt-based porphyrin in the same matrices. Paradoxically, lower oxygen permeabilities make these polymers better suited to measuring higher (i. e., ∼20%) oxygen contents than PDMS. Individual fiber sensing was studied by fluorescence spectrometry and at a sub-micrometer scale by total internal reflection fluorescence (TIRF). Specific polymer blends relate polymer composition to the resulting sensor properties. All compositions displayed linear Stern–Volmer plots; sensitivity could be tailored by matrix or the sensing probe selection

Estimated amount of variance by GxE interaction of three E factors for four diabetes traits.

<p>The GxE variance is shown as the percentage of the total phenotypic variance of each trait. *<i>P</i><0.05 indicates nominal significant contribution to total variance.</p

Estimation of heritability (%) from identified SNPs with nominal <i>P</i>-value <1.0E-5 based on GxE GWAS¹.

1<p>h²(g), heritability of additive genetic variance; h² (gxe), heritability of GxE interaction; SE, standard error.</p>2<p><i>P</i>-values were adjusted for age, sex, study center, kinship, and population structure.</p>3<p><i>P</i>-values were adjusted for age, sex, body mass index, study center, kinship, and population structure.</p>4<p>95th percentile for the <i>P</i>-value and heritability estimate from the 1000× GCTA bootstrap analysis for each trait. In each case, the GCTA GxE <i>P</i>-value falls below the 95th percentile indicating that these results are highly unlikely to be obtained merely by chance.</p

Estimation of GxE variance of 15 dietary and lifestyle factors for four diabetes-related traits.

<p>The GxE variance is shown as the percentage of the total phenotypic variance of each trait. *<i>P</i><0.05 indicates nominal significant contribution to total variance.</p