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11.
K Miyazaki Y Kato T Matsui S Hayashi Y Iriyama T Fukutsuka T Abe Z Ogumi 《Physical chemistry chemical physics : PCCP》2012,14(31):11135-11138
A high proton-conducting phase appears in the composites of zirconium- and titanium-oxide nanoparticles and polyphosphoric acid (HPO(3)). Metal oxide nanoparticles (ZrO(2) and TiO(2)) react with HPO(3) and form composite electrolytes containing pyrophosphates (ZrP(2)O(7) or TiP(2)O(7)) and shortened HPO(3) chains. The ZrO(2)-HPO(3) composite exhibits eleven times higher conductivity than sole HPO(3) at the maximum. A formed layer of shortened HPO(3) chains surrounding the pyrophosphates enhances the proton conductivities of the composite electrolytes and reduces the activation energies for the proton conductivities from 50 to 30 kJ mol(-1). 相似文献
12.
Speciation of arsenic trioxide metabolites in blood cells and plasma of a patient with acute promyelocytic leukemia 总被引:1,自引:0,他引:1
Yuta Yoshino Bo Yuan Shin-ich Miyashita Noriyoshi Iriyama Akira Horikoshi Osamu Shikino Hiroo Toyoda Toshikazu Kaise 《Analytical and bioanalytical chemistry》2009,393(2):689-697
Arsenic trioxide (As2O3) has been widely accepted as the second-best choice for the treatment of relapsed and refractory acute promyelocytic leukemia
(APL) patients. However, a few studies have been conducted on a detailed speciation of As2O3 metabolites in blood samples of patients. To clarify the speciation of arsenic, the blood samples were collected at various
time points from a patient with APL after remission induction therapy and during consolidation therapy. The total amounts
of arsenic in blood cells and plasma, and the plasma concentrations of inorganic arsenic and methylated metabolites were determined
by inductively coupled plasma mass spectrometry (ICP-MS) and high-performance liquid chromatography/ICP-MS, respectively.
The total amounts of arsenic in the blood cells were 4–10 times higher than those in plasma. Among all arsenic metabolites,
the pentavalent arsenate (AsV) in plasma was more readily eliminated. During the drug-withdrawal period, the initial plasma concentrations of trivalent
arsenic (AsIII) declined more rapidly than those of methylarsonic acid and dimethlyarsinic acid, which are known as the major methylated
metabolites of AsIII. On the other hand, during the consecutive administration in the consolidation therapy period, the plasma concentrations
of total arsenic and arsenic metabolites increased with time. In conclusion, these results may support the idea that methylated
metabolites of As2O3 contribute to the efficacy of arsenic in APL patients. These results also suggest that detailed studies on the pharmacokinetics
as well as the pharmacodynamics of As2O3 in the blood cells from APL patients should be carried out to provide an effective treatment protocol.
Electronic supplementary material The online version of this article (doi:) contains supplementary material, which is available to authorized users.
Presented at the 4th International Conference on Trace Element Speciation in Biomedical, Nutritional and Environmental Sciences,
25–29 May 2008, Munich-Neuherberg, Germany. 相似文献
13.
In this Letter, we construct a novel model of universal quantum Turing machine (QTM) by means of a property of Riemann zeta function, which is free from the specific time for an input data and efficiently simulates each step of a given QTM. 相似文献
14.
Kanji Suyama Hiroaki Iriyama Masahiro Tsunooka Masamitsu Shirai 《Journal of polymer science. Part A, Polymer chemistry》2004,42(11):2612-2620
Carbamoyloxyimino (COI) groups are precursors of photochemically base‐generating groups as well as those of thermally isocyanate‐generating groups. In this study, photochemical and thermal reactions of COI groups in oligomers were investigated by spectral analyses and solubility changes. Oligomers bearing three types of COI groups were prepared. COI groups in all oligomer films were photolyzed on irradiation with 254 nm of light and were deblocked to form isocyanato groups on heating. From the IR spectral analyses, the formation of urea linkage was confirmed by the decrease in isocyanato groups and peak generation because of urea groups on postexposure bake (PEB) treatment. For all oligomer films, PEB was effective for the enhancement of insolubilization of the films in tetrahydrofuran. Heating followed by irradiation was also effective for the insolubilization. These results indicated that photochemical and thermal treatments of COI groups afforded highly sensitive crosslinking systems because of photochemically generated basic groups and thermally generated isocyanato groups. © 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 2612–2620, 2004 相似文献
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Methane and fluoromethanes (CHnF4−n, 1 ≤ n ≤ 3) were subjected to an rf glow discharge plasma. All the fluoromethanes (including methane) polymerized in the plasma and formed thin films. The deposition rate of the fluoromethanes depended on their monomer structure: CH2F2, of which the F/H ratio is unity, showed the greatest deposition rate. The elimination of H and F atoms as H—F was found to be a key factor for the polymerization of fluoromethanes. The chemical composition of the polymerized film, measured with X-ray photoelectron spectroscopy and glow discharge emission spectroscopy, was also found to be strongly dependent on monomer structure. © 1998 John Wiley & Sons, Inc. J. Polym. Sci. A Polym. Chem. 36: 2043–2050, 1998 相似文献
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Chihiro Yada Yasutoshi Iriyama Takeshi Abe Kenji Kikuchi Zempachi Ogumi 《Electrochemistry communications》2009,11(2):413-416
A novel all-solid-state thin-film-type rechargeable lithium-ion battery employing in situ prepared both positive and negative electrode materials is proposed. A lithium-ion conducting solid electrolyte sheet of Li2O–Al2O3–TiO2–P2O5-based glass–ceramic manufactured by OHARA Inc. (OHARA sheet) was used as the solid electrolyte, which was sandwiched by Cu and Mn metal films. The Cu/OHARA sheet/Mn layer became an all-solid-state lithium-ion battery after applying d.c. 16 V to the layer, and the resultant battery operated at 0.3–0.8 V with reversible capacity of 0.45 μAh cm?2. High voltage battery was successfully prepared by applying the d.c. high voltage to a five-series of Cu/OHARA sheet/Mn layer, resulting in all-solid-state battery operating at 1.5–4.0 V. The proposed fabrication process will become a new technology to develop advanced all-solid-state rechargeable lithium-ion batteries. 相似文献
19.
Summary The preparation and spectroscopic properties of the aggregated forms of chlorophylls a and b (Chl-a and Chl-b) in methanol, dioxane and/or water were studied. In methanol-dioxane-water solutions, pure Chl-a and Chl-b formed aggregates (colloidal chlorophylldioxane adducts) absorbing at 685 nm and 672 nm; (Ca685 and Cb672, respectively). Similar species of Ca685 and Cb672 were obtained when crude methanol extracts of chlorophylls from plant materials were mixed with dioxane and water. The acicular microcrystalline precipitates as a result of co-aggregation of the species Ca685 and Cb672 were observed. The schematic diagrams of transformation among various aggregated forms of Chl-a and Chl-b in methanol, dioxane and/or water were presented and discussed.
With 10 figures 相似文献
Zusammenfassung Darstellung und spektroskopische Eigenschaften der aggregierten Formen von Chlorophyll a und b (Chl-a und Chl-b) in Methanol, Dioxan und/oder Wasser wurden untersucht. In Methanol-Dioxan-Wasser-Lösungen bilden reines Chl-a sowieChl-b Aggregate (Chlorophyll-Dioxan Addukte), die bei 685 nm sowie 672 nm absorbieren. Ähnliche Spezies wurden erhalten, wenn die methanolischen Extrakte des Chlorophylls aus den Pflanzen-Materialien mit Dioxan und Wasser gemischt wurden. Schematische Diagramme über die Umwandlung zwischen den aggregierten Formen von Chl-a und Chl-b in Methanol, Dioxan und/oder Wasser wurden diskutiert.
With 10 figures 相似文献
20.
H. Okazaki T. Arakane T. Sato T. Wakita M. Hirai Y. Takano S. Iriyama T. Yokoya 《Journal of Physics and Chemistry of Solids》2011,72(5):582-584
We studied the electronic structure evolution of heavily B-doped diamond films across the metal-insulator transition (MIT) using ultraviolet photoemission spectroscopy (UPS). From high-temperature UPS, through which electronic states near the Fermi level (EF) up to ∼5kBT can be observed (kB is the Boltzmann constant and T the temperature), we observed the carrier concentration dependence of spectral shapes near EF. Using another carrier concentration dependent UPS, we found that the change in energy position of sp-band of the diamond valence band, which corresponds to the shift of EF, can be explained by the degenerate semiconductor model, indicating that the diamond valence band is responsible for the metallic states for samples with concentrations above MIT. We discuss a possible electronic structure evolution across MIT. 相似文献