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91.
92.
Katsuhiko Yokoi Mieko Kimura Yoshinori Itokawa 《Fresenius' Journal of Analytical Chemistry》1990,336(5):423-424
Conclusion The detachable miniature hydride generator presented in this work gives the analytical chemist easy access to the determination of ultratrace levels of tin and germanium using a 1.2 kW-ICP spectrometer commercially available. An improvement of the detection limits of approximately 100 times those for conventional pneumatic nebulizer-ICP-AES, has been reported in this work. 相似文献
93.
Yokoi T Sakamoto Y Terasaki O Kubota Y Okubo T Tatsumi T 《Journal of the American Chemical Society》2006,128(42):13664-13665
Uniform-sized silica nanospheres with a well-ordered arrangement were successfully synthesized by a novel and simple method; hydrolysis and condensation reactions of tetraethyl orthosilicate were conducted in the presence of basic amino acids. 相似文献
94.
Naik SP Yokoi T Fan W Sasaki Y Wei TC Hillhouse HW Okubo T 《The journal of physical chemistry. B》2006,110(20):9751-9754
We have succeeded in the fabrication of distorted cubic R-3m mesoporous silica film with 3D open mesostructure providing high pore accessibility from the surface-air interface of the film. The film fabrication involves a unique approach of adding 1,3,5- triisopropylbenzene (TIPB) to the silica/cetyltrimethylammoniumbromide (CTAB) coating sol during its preparation. The addition of TIPB induces the formation of spheroid micelles, promoting R-3m mesostructure in the film. This phase does not exist in the corresponding binary phase diagram of CTAB surfactant. 相似文献
95.
Dynamic speckle patterns can be used for imaging of relative velocity of moving objects in fields of biomedical and mechanical measurements. In spite of the widespread use of this method, the effect of speckle size on velocity sensing has not fully been estimated so far. In addition, effects of speckle contrast and random noises on the sensitivity of velocity sensing have not been investigated yet. In the present study, we estimated condition of image processing of speckle patterns for reducing effects of random noises with relation to linearity and sensitivity in velocity sensing. We further introduced binarization of the speckle pattern to improve the sensitivity in velocity sensing. Experiments were conducted for sample models using a diffusive plate and fluid flows to confirm the feasibility of the proposed method. 相似文献
96.
97.
Kamitakahara Masanobu Takahashi Shohei Yokoi Taishi Inoue Chihiro Ioku Koji 《Applied biochemistry and biotechnology》2019,187(3):984-993
Applied Biochemistry and Biotechnology - The adhesion behavior of microorganisms on different materials was examined to obtain basic knowledge for designing support materials for microorganisms.... 相似文献
98.
Kunihiko Yokoi Toru Ozeki Iwao Watanabe Shigero Ikeda 《Journal of Electroanalytical Chemistry》1982,133(1):73-78
Reduction mechanisms of polarographic reduction waves of Mo(VI) in 0.1–5 M sulfuric acid solutions are described. Three reduction waves are observed when the concentration of sulfuric acid is >3 M. From the results of coulometry and the catalytic behavior of Mo(V), it is concluded that three different reduction mechanisms of Mo(VI) to Mo(V) are present and that two separate reductions of Mo(VI) to Mo(V) and of Mo(V) to Mo(III) are involved at the potential of the third wave. The presence of three reduction mechanisms of Mo(VI) to Mo(V) in sulfuric acid α 3 M seems to indicate the existence of three different chemical species of Mo(VI). Two of these three species are different from the present in 0.1 M sulfuric acid. 相似文献
99.
Dr. Le Xu Dr. Tianqiong Ma Yihan Shen Dr. Yong Wang Prof. Lu Han Prof. Watcharop Chaikittisilp Prof. Toshiyuki Yokoi Prof. Junliang Sun Prof. Toru Wakihara Prof. Tatsuya Okubo 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(45):20106-20111
Unit-cell-thin zeolitic nanosheets have emerged as fascinating materials for catalysis and separation. The controllability of nanosheet stacking is extremely challenging in the chemistry of two-dimensional zeolitic materials. To date, the organization of zeolitic nanosheets in hydrothermal synthesis has been limited by the lack of tunable control over the guest–host interactions between organic structure-directing agents (OSDAs) and zeolitic nanosheets. A direct synthetic methodology is reported that enables systematic manipulation of the aluminosilicate MWW-type nanosheet stacking. Variable control of guest–host interactions is rationally achieved by synergistically altering the charge density of OSDAs and synthetic silica-to-alumina composition. These finely controlled interactions allow successful preparation of a series of three-dimensional (3D) zeolites, with MWW-layer stacking in wide ranges from variably disorder to fully ordered, leading to tunable catalytic activity in the cracking reaction. These results highlight unprecedented opportunities to modulate zeolitic nanosheets arrangement in 3D zeolites whose structure can be tailored for catalysis and separation. 相似文献
100.
Yokoi Naomichi Shinohara Tomomi Funamizu Hideki Kyoso Masaki Shimatani Yuichi Yuasa Tomonori Aizu Yoshihisa 《Optical Review》2017,24(2):226-236
Optical Review - Speckle imaging method is useful for monitoring of blood flow in living bodies. We have proposed so far the method for simultaneous imaging of blood flow and blood concentration... 相似文献