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61.
Setsuji Tone Kouichi Shinohara Yasuo Igarashi Tsutao Otake 《Journal of membrane science》1984,19(2):195-208
Investigations were made of the water flux rate and rejection characteristics of aromatic substances in aqueous solutions using a thin, dense cellulose acetate membrane in reverse osmosis experiments. The aromatic substances used were phenol, aniline, hydroquinone and p-chlorophenol. The permeate became more enriched in aromatic compounds as compared to the feed solution as the water content of the membrane increased. By considering both the effects of pressure on the chemical potential of a component and the contribution of viscous flow to the overall transport of that component in the hydrated membrane, a theoretical relationship was developed to predict the negative solute rejection of the membrane. Based on this proposed theory, the permeability coefficients of water and organic solute were estimated from experimental solute rejection data, including negative values. The permeability coefficients of components were in good agreement with previously established correlations in measurements of partition and diffusion coefficients. 相似文献
62.
63.
Ohne Zusammenfassung 相似文献
64.
M. Igarashi 《Journal of polymer science. Part A, Polymer chemistry》1983,21(8):2405-2425
Identification of the free radicals in polyethylene and nylon produced by irradiation, grinding, and pulling to fracture was carried out by comparing the experimentally observed spectra with the spectra constructed from theoretical consideration with the aid of a computer. It was demonstrated that the various primary and secondary radicals are produced and formed in the materials depending upon means of degradation, degradation processes, orientation of materials, and conditions of ESR measurement. 相似文献
65.
Y. Igarashi M. Hohmura A. Kobayashi H. Otsu T. Sato S. Sawada 《Nuclear Physics B》1985,259(4):721-729
It is shown that a skyrion can be stabilized by introducing ?-mesons into the chiral SU(2)L × SU(2)R lagrangian without higher-derivative terms like the Skyrme term. The ?-mesons are considered as dynamical gauge bosons associated with a hidden local symmetry of the non-linear sigma model. The lagrangian reduces to the Skyrme model in a limit of parameters. The Skyrmion mass M is found to be M = 1058 MeV when the parameters are fixed so as to satisfy the KSRF relation. It is also shown that a solition solution in a model with Ω-meson coupled with the baryonic current is a saddle-point solution. 相似文献
66.
The system to be considered in this paper is
67.
Tamai Nobutake Inazawa Sanae Takeuchi Saori Goto Masaki Matsuki Hitoshi 《Journal of Thermal Analysis and Calorimetry》2019,135(5):2635-2645
Journal of Thermal Analysis and Calorimetry - We investigated the phase behavior of a binary bilayer membrane of dipalmitoylphosphatidylcholine (DPPC) and stigmasterol (Stig) as a function of the... 相似文献
68.
N. Fujita N. Inaba F. Kirino S. Igarashi K. Koike H. Kato 《Journal of magnetism and magnetic materials》2008
Gilbert's damping constants, α, of Co(tCo)/Pt (1.4 nm) multilayer thin films are investigated by Q-band FMR analysis. α is calculated from the resonance width of the FMR spectrum. With decreasing tCo, the α value decreases from 0.034 (tCo=8.7 nm) to 0.023 (tCo=1.8 nm), and then increases to 0.037 (tCo=1.0 nm). The decrease of α with tCo>1.8 nm is probably due to the eddy current loss effects. The increase of α with tCo<1.8 nm would be caused by the increase of the distortion between the Co and the Pt layers at the interface. When the magnetic field direction was changed from θ=90° (parallel to the specimen) to θ=0° (perpendicular to the specimen), the α of all the specimens increased, and a sharp step in α was observed around θ=40°, where the α has the maximum value. 相似文献
69.
Dr. Daijiro Ueda Saori Matsugane Wataru Okamoto Prof. Dr. Masayuki Hashimoto Prof. Dr. Tsutomu Sato 《Angewandte Chemie (International ed. in English)》2018,57(32):10347-10351
Non‐C5‐units terpenoids (norisoprenoids) with an acetonyl group are widely distributed in nature. However, studies on the biosynthesis of norisoprenoids are scarce. Now, the C33 norisoprenoid, (all‐E)‐farnesylfarnesylacetone, was identified from Bacillus spp. and it was elucidated for the first time that superoxide mediates the cleavage of menaquinones (vitamin K) to form norisoprenoids in saponification treatment. From in vivo experiments using gene‐disrupted Bacillus subtilis strains targeted for enzymes responsible for menaquinone biosynthesis and for superoxide dismutase, it was suggested that the non‐enzymatic cleavage (autoxidation) of menaquinone with superoxide resulted in norisoprenoid synthesis in Bacillus cells. Furthermore, the bioactive norisoprenoids, farnesylacetone and phytone, were produced in Bacillus cells by this novel synthesis system. 相似文献
70.
K. Hirose M. Aoyama Y. Igarashi K. Komura 《Journal of Radioanalytical and Nuclear Chemistry》2008,276(3):795-798
137Cs in seawater is one of the most powerful tracers of water motion. Large volumes of samples have been required for determination
of 137Cs in seawater. This paper describes improvement of separation and purification processes of 137Cs in seawater, which includes purification of 137Cs using hexachloroplatinic acid in addition to ammonium phosphomolybdate (AMP) precipitation. As a result, we succeeded the
137Cs determination in seawater with a smaller sample volume of 10 liter by using ultra-low background gamma-spectrometry in
the Ogoya underground facility. 137Cs detection limit was about 0.1 mBq (counting time: 106 s). This method is applied to determine 137Cs in small samples of the South Pacific deep waters. 相似文献