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Itsuo Mori Yoshikazu Fujita Minako Toyoda Miyoko Hamada Masao Akagi 《Fresenius' Journal of Analytical Chemistry》1992,343(12):902-904
Summary A simple and sensitive determination of cobalt(II) is based on its fluorescence reaction with p-hydroxy-2-anilinopyridine and hydrogen peroxide. The relative standard deviation is 2.5% (n=5). An application to pharmaceutical preparations is recommended.The application of diarylamine compounds in analytical chemistry. IV.-Part III see ref. [1] 相似文献
154.
Hiroko Asakura Munetoshi Sakai Yoshikazu Kameshima Kiyoshi Okada 《Applied Surface Science》2007,253(6):3098-3102
Motion and deformation of a water-based magnetic fluid on a hydrophobic surface were investigated under gravity and a magnetic field. Surface energy and the resultant contact angle of the magnetic fluid depend on the surfactant concentration. The fluid viscosity is governed mainly by magnetite concentration. The front edge of the droplet moved under a weak external field. The rear edge required a higher external field for movement. The forces of gravity and the magnetic field for moving of the front edge are almost equal. However, those of the rear edge are different. The motion of magnetic fluids by an external field depends on concentrations of surfactants and magnetic particles, the external field, and experimental assembly. 相似文献
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Takako Yamaguchi Emi Amano Shinichiro Kamino Satoko Umehara Chizuko Yanaihara Yoshikazu Fujita 《Analytical sciences》2005,21(10):1237-1240
A simple and sensitive spectrophotometric method for the determination of human serum albumin (HSA) was established based on the ternary complex-formation reaction of HSA with o-sulfophenylfluorone (SPF) as a xanthene dye and metal ion (niobium(V) and bismuth(III)) in the presence of a dispersion agent. This new method enabled the determination of HSA in the range of 1 - 15 microg/ml HSA by measuring the difference of the absorbance at 530 nm between HSA-SPF-metal ion and SPF-metal ion solutions. In the determination of HSA, this method is about 2-times more sensitive than the Pyrogallol Red-molybdenum(VI) method (PR method), which accounts for more than 80% of the quantification methods for urinary protein assays in Japan. There was no significant difference between the results obtained by the present method and the PR method for human urine samples. The binding process between the SPF-metal complex and HSA was studied by determining the binding parameters and the thermodynamic parameters. 相似文献
157.
Shuichi Iwadare Yoshikazu Shizuri Kiyoyuki Yamada Yoshimasa Hirata 《Tetrahedron letters》1974,15(13):1177-1178
Synthesis of trichotomine, a blue pigment obtained from thunb. 相似文献
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