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排序方式: 共有105条查询结果,搜索用时 31 毫秒
91.
Ohtaki H Yamamoto T Yoshimoto T Uchihi R Ooshima C Katsumata Y Tokunaga K 《Electrophoresis》2002,23(19):3332-3340
A new multiplex system for six tetranucleotide short tandem repeat (STR) loci was devised based on multicolor dye technology. Six loci (D20S480, D6S2439, D6S1056, D9S1118, D4S2639, and D17S1290), each with high discriminating power (each unbiased estimates of expected heterozygosity, Exp. Hz, > 0.80 in a preliminary test), were selected from more than 100 tetranucleotide STRs included in a commercially available primer set. These loci were also selected so as not to link with general STRs in commercially released kits including the combined DNA index system (CODIS) 13 core STRs. The primers were newly designed in the present study, in which each amplicon size had a range of less than 200 base pairs (bp), in order to genotype from highly degraded template DNA. Using this system, we genotyped 270 Honshu (mainland)-Japanese and 187 Okinawa-Japanese. From these allele frequencies, we performed three tests, a homozygosity test, a likelihood ratio test and an exact test for Hardy-Weinberg equilibrium (HWE), and no significant deviations (p < 0.05) from HWE were observed. We also compared the allele distributions at six STRs between both populations, and they were significantly different (p < 0.05) at three loci (D6S2439, D9S1118 and D4S2639). Furthermore, the Exp. Hz and the power of discrimination (PD) at all loci in the Honshu-Japanese population were higher than 0.80 and 0.93, respectively. These statistical values for discriminating power in the Honshu-Japanese were almost the same as in the Okinawa-Japanese. This novel, multiplex polymerase chain reaction (PCR) amplification and typing system for six STR loci thus promises to be a convenient and informative new DNA profiling system in the forensic field. 相似文献
92.
A polar oxide ZnSnO3 was synthesized by a solid-state reaction under a pressure of 7 GPa and a temperature of 1000 degrees C. The crystal structure was determined by Rietveld analysis of the X-ray powder diffraction data. ZnSnO3 has a rhombohedral LiNbO3-type structure with unit cell parameters, a = 0.52622(1) nm, c = 1.40026(2) nm (space group: R3c). The polar structure is characterized by the large displacement of Zn along the c-axis in the ZnO6 octahedron based on the strong chemical bonding between Zn and three O. ZnSnO3 is a candidate piezoelectric and pyroelectric material as well as nonlinear optical material. 相似文献
93.
Yasutoshi Shirota Md. Nurul Amin Yoshifumi Watanabe Satoshi Kaneco Hideyuki Katsumata Tohru Suzuki Kiyohisa Ohta 《Analytica chimica acta》2006,560(1-2):159-163
The determination of alkali metal chloride in river waters by sequential molecular vapor elution analysis (SMVEA) using a molecular absorption detector (MA) is reported. An improved molybdenum column was developed for SMVEA. An optimum flow rate of carrier gas (pure argon or nitrogen) for separation of metal vapors was 12.0 ml min−1. Lithium chloride and sodium chloride peaks completely separated from potassium, rubidium, and cesium chlorides but CaCl2, FeCl2, MgCl2, and MnCl2 peaks did not appear at a column temperature of 1000 °C and vaporization temperature of 1000 °C. The appearing order of these metal chlorides was LiCl, NaCl, KCl, RbCl, and CsCl. It was not understood by considering the boiling points of these metal chlorides. The delay of appearing time is due to an interaction between the molecular vapors and inside surface of the column. Under the experimental conditions, the number of theoretical plates was 247 for LiCl and 268 for NaCl in the improved column. Under the optimal experimental conditions, river waters were analyzed for lithium and sodium chlorides. The analytical results agreed well with the recoveries were in the range of 94–105%. By SMVEA, it was found that lithium and sodium chlorides in waters were determined without interference of matrix elements, no chemical treatment for river water samples. 相似文献
94.
Kazuaki Masuyama Satoshi Kaneco Naomi Nishikawa Atsuo Funaki Hiroyuki Ioka Rie Mihara Hideyuki Katsumata Tohru Suzuki Kiyohisa Ohta 《Chemistry of Natural Compounds》2010,46(1):79-82
The deactivating of mite allergens was investigated using lignophenols, which are polymers with a light-beige appearance that
were synthesized directly from lignocellulose with a phase-separation system. Various applications of lignophenols, instead
of the photochemical solar cell dye-sensitized with lignophenol, have been reported. In the present study, lignophenols were
applied for the deactivation of mite allergens. 相似文献
95.
K. Kojima A. Keren L.P. Le M. Larkin G.M. Luke B. Nachumi W.D. Wu Y.J. Uemura M. Azuma M. Takano K. Kiyono S. Miyasaka N. Motoyama H. Takagi S. Uchida M. Hase Y. Sasago K. Uchinokura M. Matsuda K. Katsumata A. Revcolevschi R. Cava 《Hyperfine Interactions》1997,104(1-4):37-42
We introduce our μSR investigations of spin‐gap systems, such as, (1) a 2‐leg spin‐ladder material SrCu2O3, (2) a Haldane material (S=1 spin‐chain) Y2BaNiO5, (3) a spin‐Peierls material CuGeO3, (4) a spin‐chain# material Sr6Ca8Cu24O41. All of these antiferromagnetic spin systems are characterized by a spin‐gap between the singlet ground‐state and the triplet
first excited states. In the above‐mentioned materials, we confirmed the absence of magnetic order down to milli‐Kelvin regime,
supporting the non‐magnetic feature of the ground‐state.
If a spin‐gap system is doped with charges and/or vacancies at the spin site, unpaired spins are induced out of the singlet
ground‐state. In some materials, doping completely destroys the singlet ground‐state and induces a bulk magnetic order. We
report μSR investigations of doped materials as well, which clarifies the existence/absence of a magnetic order upon doping.
This revised version was published online in July 2006 with corrections to the Cover Date. 相似文献
96.
Time dependence of thermoremanent magnetization (TRM) in a new spin-glass, Rb2Mn(1-x)CrxCl4 is measured at temperatures below the freezing temperature. The result shows that long time behavior of the TRM obeys a power law, M(t) = Ct?A. It is shown from the analysis of the experiment that there is a possibility of the presence of a critical temperature. 相似文献
97.
The asymmetry parameter (β) of the photoelectron angular distribution for H2S has been measured with NeI, NeII and HeII resonance radiation The present results on the energy dependence of β for each ionic stale are in excellent agreement with theoretical results obtained by Roche et al with an Xα scatteimg wave method 相似文献
98.
Concentration vs transition temperature phase diagram of a random mixture of two anisotropic antiferromagnets, FeCl2 and CoCl2, is obtained from the measurement of the susceptibility on the single crystals. Two distinct critical points, one along the c-axis and the other in the c-plane, are observed for the respective concentrations between x = 0.264 and x = 0.481. Three kinds of ordered phases, namely, Fe-rich and Co-rich antiferromagnetic phases and a new phase are found. The phase diagram shows a tetracritical point as well.A hump is observed in the temperature dependence of the susceptibility along the c-axis (c-plane for x ? 0.3) near the ordering temperature occuring in the c-plane (c-axis for x ? 0.3). 相似文献
99.
Antiferromagnetic and ferromagnetic resonance experiments at submillimeter wavelengths have been performed on random mixtures Fe1?xCoxCl2 of two metamagnets with competing orthogonal spin anisotropies. The results show clearly the competition of the anisotropies in these alloys. The anisotropy in these mixtures decreases with concentration in both the iron rich and cobalt rich regions. 相似文献
100.
Inaguma Y Tanaka K Tsuchiya T Mori D Katsumata T Ohba T Hiraki K Takahashi T Saitoh H 《Journal of the American Chemical Society》2011,133(42):16920-16929
We synthesized two high-pressure polymorphs PbNiO(3) with different structures, a perovskite-type and a LiNbO(3)-type structure, and investigated their formation behavior, detailed structure, structural transformation, thermal stability, valence state of cations, and magnetic and electronic properties. A perovskite-type PbNiO(3) synthesized at 800 °C under a pressure of 3 GPa crystallizes as an orthorhombic GdFeO(3)-type structure with a space group Pnma. The reaction under high pressure was monitored by an in situ energy dispersive X-ray diffraction experiment, which revealed that a perovskit-type phase was formed even at 400 °C under 3 GPa. The obtained perovskite-type phase irreversibly transforms to a LiNbO(3)-type phase with an acentric space group R3c by heat treatment at ambient pressure. The Rietveld structural refinement using synchrotron X-ray diffraction data and the XPS measurement for both the perovskite- and the LiNbO(3)-type phases reveal that both phases possess the valence state of Pb(4+)Ni(2+)O(3). Perovskite-type PbNiO(3) is the first example of the Pb(4+)M(2+)O(3) series, and the first example of the perovskite containing a tetravalent A-site cation without lone pair electrons. The magnetic susceptibility measurement shows that the perovskite- and LiNbO(3)-type PbNiO(3) undergo antiferromagnetic transition at 225 and 205 K, respectively. Both the perovskite- and LiNbO(3)-type phases exhibit semiconducting behavior. 相似文献