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141.
The luminescence excitation spectra of the direct exciton resonance emissions are measured for TlBr and TlCl at 1.8 K. A remarkable oscillation structure with a period of the Γ-point LO phonon energy is observed. Such a hot exciton effect is explained on the basis of the characteristic energy band structure of TlBr and TlCl. 相似文献
142.
The temperature dependence of magnetization and magnetic susceptibility and hydrostatic pressure effect on the Surie temperature (dTc/dP) are measured for (Co1-xMnx)2B (0?x?0.4) amorphous alloys and the results are compared with those of crystalline compounds with the same composition. The Curie temperature decreases linearly with an increasing Mn content but magnetization shows a maximum around x=0.15. The reciprocal magnetic susceptibility of all the prepared alloys obeys the Curie-Weiss law above Tc. The magnitude of the negative value of dTc/dP decreases linearly with increasing x from about 1.1 K/kbar (x=0) to zero (x=0.4), the composition dependence of which is opposite to that of the crystalline compound. The composition dependence of the average magnetic moment per transition metal atom and the Curie temperature and dTc/dP are analysed on the basis of the local environment and the pair order interaction mode, respectively. 相似文献
143.
Hadronic lepton-pair production in perturbative QCD is calculated to order to be usable in combination with the existing calculation of the anomalous dimension of order . The structure function of the subprocess anything in an arbitrary covariant gauge for gluons is found to have gauge-dependent contributions which are exactly cancelled by contributions from operator matrix elements to give the gauge-independent “coefficient function” for lepton-pair production in the minimal subtraction scheme. This provides a consistency check of the perturbative QCD recipe. A comparison is made with other existing calculations. 相似文献
144.
Masao Shiozaki Yukiko Watanabe Toshio Kaneko Daisuke Tanaka Shin-ichi Kurakata 《Tetrahedron》2005,61(21):5101-5122
Lipid A analogues containing glucose in substitution for glucosamine on the reducing end were synthesized, and the inhibitory activities on LPS-induced TNFα production (LPS-antagonistic activity) in vitro using human whole blood cells were measured. The IC50 values (nM) of these ten compounds, 8, 14, 21, 31, 40, 51, 57, 62, 67 and 72, were 11.2, 15.4, 2.7, 0.1, 0.4, 1.3, 3.2, 3.2, 1.4 and 14.4, respectively. And also inhibitory activities (ID50) on TNFα production toward galactosamine loaded C3H/HeN mice in vivo of compounds 21, 31, 57, 62 and 67 were measured. The values of these compounds were 0.29, 0.50, 0.61, not dose-dependent and 0.33 mg/kg, respectively. 相似文献
145.
Onoda M Tokuyama H Uchiyama S Mawatari K Santa T Kaneko K Imai K Nakagomi K 《Chemical communications (Cambridge, England)》2005,(14):1848-1850
Strong fluorescence signals were observed after the reaction of novel reagents with hydroperoxides. 相似文献
146.
Shirakawa M Fujita N Tani T Kaneko K Shinkai S 《Chemical communications (Cambridge, England)》2005,(33):4149-4151
A newly synthesized 8-quinolinol platinum(II) chelate derivative gelates various organic solvents, and the gel formed shows unique thermo- and solvatochromism of visible and phosphorescent colour in response to a sol-gel phase transition and possesses an attractive ability to inhibit dioxygen quenching of excited triplet states. 相似文献
147.
148.
The crystal structure of K2CuF4 has been studied by means of Raman scattering. The structure is found to belong to the space group D4h5 rather than D4h17 of K2NiF4 between 2 and 800 K because of the distortion arising from the “orbital ordering effect”. 相似文献
149.
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