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131.
Kikuchi Y Yamada H Kunimori H Tsukada T Hozawa M Yokoyama C Kubo M 《Langmuir : the ACS journal of surfaces and colloids》2005,21(8):3273-3278
In this study, the aggregation and breakup behaviors of latex particles in shear flow confined between two parallel plates were investigated using an in situ observation apparatus with a laser scanning confocal microscope. To investigate the effects of shear rate and the gap width between two parallel plates on the size and structure of the aggregates in the steady state, the distributions of the projected cross-sectional area and perimeter-based fractal dimension of the aggregates were measured. As a result, the average size of the aggregates decreases as shear rate increases and the gap width decreases due to the hydrodynamic effect acting on the aggregates. The size distributions of the aggregates become narrow as the gap width decreases. In addition, the fractal dimension, that is, the structure of the aggregates, was almost independent of shear rate and the gap width and approximately 1.2, which suggests that the aggregates are relatively compact. 相似文献
132.
A simple and sensitive high-performance liquid chromatographic method has been developed for the determination of forphenicine in biological samples. Forphenicine in the deproteinized sample is converted by reaction with 1,2-diamino-4,5-ethylenedioxybenzene into a fluorescent derivative. The derivative is separated on a reversed-phase column (TSK gel ODS-120T) by isocratic elution with acetonitrile-30 mM phosphate buffer (pH 6.5) (5:1, v/v) and monitored fluorimetrically. The method allows the quantification of forphenicine in serum (100 microliters) and muscle (0.1 g) of mice dosed with forphenicine or forphenicinol. The limits of detection (signal-to-noise ratio of 3) are 7.35 pmol/ml in serum and 5.36 pmol/g in muscle. The distribution of forphenicine and forphenicinol in the mouse serum and muscle after oral administration of these compounds is also described. 相似文献
133.
Three horseradish peroxidase (HRP)-labeled porcine insulins which have definite labeling site(s) were compared regarding sensitivity in a solid-phase enzyme-immunoassay (EIA) of anti-insulin antibodies. The standard curves obtained with LysB29-HRP-insulin and GlyA1-HRP-insulin were steeper than that with GlyA1,LysB29-diHRP-insulin for both polyclonal and monoclonal antibodies. Thus, the mono-HRP-labeled insulins can afford higher sensitivities in the EIA. The importance of the HRP-labeling site in insulin and of the number of labeled HRP was first demonstrated by using HRP-labeled insulins having definite labeling site(s). 相似文献
134.
Nguyen Chung Thanh Takanori Kajioka Yasunori Taga Satoshi Ogawa Yosuke Miyahara Mitsunori Oda 《Tetrahedron》2006,62(48):11227-11239
After a preliminary search of the reaction conditions for the Suzuki-Miyaura cross-coupling of haloazulenes with arylboronic acids, the title compounds were synthesized either by the direct coupling reaction between 1,3-dihaloazulene and the corresponding N,N-disubstituted 4-aminophenylboronic acids or by a two-step sequence involving the cross-coupling with 4-bromophenylboronic acid and subsequent Pd-catalyzed amination. Application of the title diamines to a hole-injecting material in organic electroluminescent devices was carried out to provide their prominent characteristics as a novel durable, non-cyanine and non-polyamine substance without color fade. The diamine derivatives, extended by an ethynyl unit between the azulenyl core and the 4-aminophenyl moiety, were also synthesized and found, unfortunately, unsuitable for vacuum deposition in preparing a multilayer composite. 相似文献
135.
136.
Minoru Yamaji Hideki Okamoto Kenta Goto Shin-ichiro Kato Fumito Tani Yosuke Nakamura 《Tetrahedron letters》2018,59(13):1216-1219
We prepared isomeric compounds 2a and 2b having fused skeletons of coumarin and fluorene by photochemical cyclization of olefin 1. They were successfully separated by chromatography, and characterized by NMR spectroscopic and X-ray crystallographic analyses. The molecular structure of 2a was nonplanar due to the repulsion between the carbonyl group of the coumarin moiety and the methylene group at 9-position on the fluorene skeleton whilst that of 2b was planar. They showed different absorption and fluorescence features in solution whereas their spectral profiles of triplet–triplet absorption and phosphorescence were similar to each other. 相似文献
137.
Yosuke Uchinashi Katsunori Tanaka Yoshiyuki Manabe Yukari Fujimoto 《Journal of carbohydrate chemistry》2013,32(2):55-67
Efficient α-sialylation with a C5 azide sialyl donor was investigated under microfluidic conditions using a microreactor composed of a Comet X-01 micromixer and a tube reactor. Precise temperature control realized excellent α-selectivity, and Siaα(2,6)Gal, Siaα(2,3)Gal, and Siaα(2,9)Sia disaccharides were obtained in moderate to good yields. 相似文献
138.
139.
Yosuke Ishii 《Journal of Physics and Chemistry of Solids》2010,71(4):511-576
We have investigated the Li-ion battery anode properties of several kinds of mesoporous composites of carbon and titanium dioxides (titania, TiO2) prepared by tri-constituent co-assembly method. The maximum reversible capacity (197 mAh/g) at current density of 50 mA/g was obtained for the composite of TiO2:carbon=7:3 calcined at 600 °C. It was also found that the composite maintained the high reversible capacity as large as 109 mAh/g even at the high current density of 1000 mA/g. 相似文献
140.
Yosuke Hisamatsu 《Tetrahedron letters》2007,48(4):617-621
A new macrocyclic host, which contains a 2,6-bis(oxazol-2-yl)pyridine unit and a 2,7-dialkoxynaphthalene unit tethered by the appropriate length of alkyl side chains is prepared. This host undergoes highly selective complex formation with an adenine nucleobase, accompanied by a fluorescence response in CHCl3 by a combination of multiple hydrogen bonding and π-π stacking interactions. 相似文献