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991.
Kensuke Shigeta Masafumi Kikuchi Masaki Tanaka Shinya Takasaki Hisashi Oishi Tetsu Sado Yasushi Matsuda Masafumi Noda Yoshinori Okada Nariyasu Mano Hiroaki Yamaguchi 《Biomedical chromatography : BMC》2020,34(8):e4853
Sirolimus is used on patients after solid organ transplantation and on lymphangioleiomyomatosis (LAM) patients, and therapeutic drug monitoring is required in clinical practice. We have previously reported an accurate method for quantitative determination of sirolimus, but its sample preparation step was complicated. In this study, we developed a modified liquid chromatography/electrospray ionization tandem mass spectrometry (LC/ESI–MS/MS) method for sirolimus quantification. A supported liquid extraction cartridge was used to purify sirolimus from whole blood and ion suppression was mostly prevented. The validation results met the acceptance criteria. This method was compared with the antigen conjugated magnetic immunoassay (ACMIA) and our previously reported method, using whole blood samples from LAM patients. Comparison of the Bland–Altman plots of the currently developed method and the previous method revealed no significant difference between the two methods (mean bias, −2.02%; 95% CI, −7.81–3.78). The values obtained using ACMIA were significantly higher than those obtained using the current method by 13.87% (95% CI, 6.49–21.25) owing to cross-reactivity. The degrees of cross reactivities in LAM patients and in organ transplant patients were similar, and our LC/ESI–MS/MS method precisely measured the blood concentrations of sirolimus. 相似文献
992.
Kenta Awa Ryo Akashi Atsunobu Akita Dr. Shin-ichi Naya Prof. Dr. Hisayoshi Kobayashi Prof. Dr. Hiroaki Tada 《Chemphyschem》2019,20(17):2155-2161
Single-crystal SnO2 nanorods were grown on rutile TiO2 with a heteroepitaxial relation of SnO2{001}/TiO2{001} (SnO2-NR#TiO2) by a hydrothermal reaction. Resulting compressive lattice strain in the SnO2-NR near the interface induces a continuous increase in the a-axis length extending over 60 nm to relax towards the [001] direction from the root to the tip. UV-light irradiation of the robust SnO2-NR#TiO2 stably progresses the selective oxidation of ethanol to acetaldehyde with an external quantum yield of 25.6 % at excitation wavelength (λex)=365 nm under ambient temperature and pressure. Spectroscopic analyses and density functional theory simulation results suggested that the extremely high photocatalytic activity stems from the smooth interfacial electron transfer from TiO2 to SnO2-NR through the high-quality junction and subsequent efficient charge separation due to the lattice strain-induced unidirectional potential gradient of the conduction band minimum in the SnO2-NR. 相似文献
993.
Hiroaki Niikuni 《Integral Equations and Operator Theory》2014,79(4):477-505
In this paper, we consider the Schrödinger operators with a periodic potential and the δ type vertex conditions on a metric graph, which is called the degenerate zigzag nanotube, and discuss those spectrum. We demonstrate that the spectrum has the band structure. Moreover, we give the asymptotics of the band edges. 相似文献
994.
Hybrids of Copolymers of Fluorene and C60‐Carrying‐Carbazole with Semiconducting Single‐Walled Carbon Nanotubes 下载免费PDF全文
Fumiyuki Toshimitsu Hiroaki Ozawa Prof. Naotoshi Nakashima 《Chemistry (Weinheim an der Bergstrasse, Germany)》2015,21(8):3359-3366
Three different copolymers of C60‐carrying‐carbazole and fluorene units with different copolymer composition ratios were designed and synthesized. On the basis of photoluminescence, atomic force microscopy, and Vis‐NIR and Raman spectroscopic analysis, we found that these copolymers solubilize only semiconducting single‐walled carbon nanotubes (sem‐SWNTs) to form copolymer/sem‐SWNT hybrids, in which energy transfer from the copolymer/C60 moieties to the SWNTs was revealed. By comparing two possible hybrid structures with molecular‐mechanics simulations, the greatest stabilization was found when the C60 moieties lay on the sem‐SWNT surfaces. 相似文献
995.
We experimentally verify that surface plasmon (SP) enhances the photoluminescence (PL) of visible light from Tb3+ -doped 60SiO2 -20Al2O3 -20CaF2 :0.3Tb 3+ , 20Yb 3+ glass ceramics by using electron beam lithography to fabricate silver nanoparticles on the surface of the glass ceramics. Numerical calculation for the SP enhancement spectroscopy is achieved by using the finite-difference time-domain algorithm. A PL enhancement of Tb3+ by as much as 1.6 times is observed. The PL enhancement is mainly due to the coupling of excitation from 7 F 6 to 5 D 4 transition dipole of Tb 3+ ion with SP mode induced from the silver nanoparticles. 相似文献
996.
We investigate a model in which tiny neutrino masses are generated at the two-loop level by using scalar leptoquark and diquark multiplets. The diquark can be singly produced at the LHC, and it can decay into a pair of leptoquarks through the lepton number violating interaction. Subsequent decays of the two leptoquarks can provide a clear signature of the lepton number violation, namely two QCD jets and a pair of same-signed charged leptons without missing energy. We show that the signal process is not suppressed while neutrino masses are appropriately suppressed. 相似文献
997.
Masahiro Arai Tatsuya Sasaki Satoshi Hirota Hiroaki Ito Marino Quaresimin 《Acta Mechanica Solida Sinica》2012,25(3):321-330
In the present paper, the influence of carbon nanofiber on interlaminar fracture toughness of CFRP investigated using MMB(Mixed Mode Bending) tests. Vapor grown carbon fiber VGCF and VGCF-S, and multi-walled carbon nanotube MWNT-7 has been employed for the toughener of the interlayer on the CFRP laminates. In order to evaluate the fracture toughness and mixed mode ratio of it, double cantilever beam (DCB) tests, end notched fracture (ENF) tests and mixed mode bending (MMB) tests have been carried out. Boundary element analysis was applied to the CFRP model to compute the interlaminar fracture toughness, where extrapolation method was used to determine the fracture toughness and mixed mode ratio. The interlaminar fracture toughness and mixed mode ratio can be extrapolated by stress distribution in the vicinity of the crack tip of the CFRP laminate. It was found that the interlaminar fracture toughness of the CFRP laminates was improved inserting the interlayer made by carbon nanofiber especially in the region where shear mode deformation is dominant. 相似文献
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