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811.
Thiobarbituric acid-reactive substances from peroxidized lipids 总被引:2,自引:0,他引:2
The thiobarbituric acid (TBA) reaction was performed on linoleic acid 13-monohydroperoxide, autoxidized fatty esters, edible
fats and oils, rat liver microsomal lipids, and on human erythrocyte ghost lipids in order to determine which substances from
peroxidized lipids are TBA-reactive. The reaction was carried out in 2% acetic acid containing butylated hydroxytoluene using
two different reaction modes: a one-step mode which involves heating at 100°C, and a two-step mode which involves first treatment
at 5°C and subsequent heating at 100°C. Yields of the red 1∶2 malonaldehyde/TBA adduct, as estimated by absorbance, fluorescence
intensity and high-performance liquid chromatography, were much higher than the malonaldehyde content as determined by direct
chemical analysis. Yields of red pigment obtained by the two-step mode were slightly higher than those obtained by the one-step
mode. Pigment yields were dramatically increased by addition oft-butyl hydroperoxide. Red pigment formation from alkenals and alkadienals was similarly enhanced by the two-step mode or by
addition oft-butyl hydroperoxide, whereas pigment formation from malonaldehyde was not. It appears likely that a component of the total
red pigment formed from the peroxidized lipids was due to aldehyde species other than malonaldehyde. 相似文献
812.
Yoshiyuki Hattori Natsuko Noguchi Hidekazu Touhara Shigenori Utsumi Hirofumi Kanoh 《Carbon》2007,45(7):1391-1395
Fluorinated activated carbon fibers (F-ACFs) were prepared by direct thermal fluorination of pristine activated carbon fibers. By the pyrolysis of F-ACFs at 1073 K under nitrogen gas flow, fluorine was subsequently eliminated and the sp2-bonded ACF structures were recovered. The micropore widths were 1.1 and 0.8 nm, and the isosteric heats of adsorption of nitrogen were 11.3 and 12.8 kJ/mol for pristine and defluorinated ACFs, respectively. These results strongly suggest that changes occurred in the structural properties of micropores in defluorinated ACFs. The hydrogen adsorption isotherms showed that the defluorinated ACFs adsorbed more hydrogen gas than pristine ACFs at 77 K, suggesting that the potential for interaction between hydrogen molecules and the defluorinated slit nanospaces was increased due to the changes in the pore structural properties and/or to the induced polarization of the pore walls making up the modified π-electron systems. 相似文献
813.
Hiromichi Kawano Tetsuo Hattori Katsunori Takeda Tetsuya Izumi 《Artificial Life and Robotics》2010,15(4):425-430
The change point detection (CPD) problem in a time series is when it is found that the structure of the data being generated
has changed at some time and for some reason. We have formulated structural change detection in a time series as an optimal
stopping problem using the concept of dynamic programming (DP), and we present the optimal solution and its correctness by
numerical calculations. In this article, we present the solution theorem and its proof using reduction to absurdity. 相似文献
814.
The graph reconstruction conjecture is a long-standing open problem in graph theory. There are many algorithmic studies related to it, such as DECK CHECKING, LEGITIMATE DECK, PREIMAGE CONSTRUCTION, and PREIMAGE COUNTING. We study these algorithmic problems by limiting the graph class to interval graphs. Since we can solve GRAPH ISOMORPHISM for interval graphs in polynomial time, DECK CHECKING for interval graphs is easily done in polynomial time. Since the number of interval graphs that can be obtained from an interval graph by adding a vertex and edges incident to it can be exponentially large, developing polynomial time algorithms for LEGITIMATE DECK, PREIMAGE CONSTRUCTION, and PREIMAGE COUNTING on interval graphs is not trivial. We present that these three problems are solvable in polynomial time on interval graphs. 相似文献
815.
WOZ experiments for understanding mutual adaptation 总被引:1,自引:0,他引:1
Yong Xu Kazuhiro Ueda Takanori Komatsu Takeshi Okadome Takashi Hattori Yasuyuki Sumi Toyoaki Nishida 《AI & Society》2009,23(2):201-212
A robot that is easy to teach not only has to be able to adapt to humans but also has to be easily adaptable to. In order
to develop a robot with mutual adaptation ability, we believe that it will be beneficial to first observe the mutual adaptation
behaviors that occur in human–human communication. In this paper, we propose a human–human WOZ (Wizard-of-Oz) experiment setting
that can help us to observe and understand how the mutual adaptation procedure occurs between human beings in nonverbal communication.
By analyzing the experimental results, we obtained three important findings: alignment-based action, symbol-emergent learning,
and environmental learning. 相似文献
816.
Anderson James R.; Kuroshima Hika; Hattori Yuko; Fujita Kazuo 《Canadian Metallurgical Quarterly》2005,119(4):461
Co-orientation by capuchin (Cebus apella) and squirrel (Saimiri sciureus) monkeys in response to familiar humans abruptly switching the direction of their visual attention was recorded. Co-orientation occurred more frequently overall in capuchins than squirrel monkeys. Capuchins showed a tendency to habituate within trials involving consecutive attention switches performed by 2 different people, whereas squirrel monkeys co-oriented more when the 2nd attention switch was by a 2nd actor. These results suggest variable attention-processing abilities in New World monkeys, including differences in summation of attention by others. (PsycINFO Database Record (c) 2010 APA, all rights reserved) 相似文献
817.
Reiji Hattori Shuhei Yamada Yoshitomo Masuda Norio Nihei Ryo Sakurai 《Journal of the Society for Information Display》2004,12(4):405-409
Abstract— Paper‐like displays as thin as 290 μm have been developed using QR‐LPD technology. We fabricated two types of displays. One is a dot‐matrix type with a 160 × 160 array of pixels and a 3.1‐in.‐diagonal viewable image size. The other is a segmented type for clock use. Each display has a paper‐like appearance and exhibits high contrast. Plastic substrates with a thickness of 120 μm were used, resulting in flexible displays that can be bent up to a radius of curvature of 20 mm. 相似文献
818.
K. Hattori R. Kobayashi T. Numata S. Inoue D. Fukuda 《Journal of Low Temperature Physics》2018,193(3-4):217-224
Optical transition edge sensors (TESs) are characterized by a very fast response, of the order of \(\upmu \)s, which is \(10^3\) times faster than TESs for X-ray and gamma-ray. To extract important parameters associated with the optical TES, complex impedances at high frequencies (> 1 MHz) need to be measured, where the parasitic impedance in the circuit and reflections of electrical signals due to discontinuities in the characteristic impedance of the readout circuits become significant. This prevents the measurements of the current sensitivity \(\beta \), which can be extracted from the complex impedance. In usual setups, it is hard to build a circuit model taking into account the parasitic impedances and reflections. In this study, we present an alternative method to estimate a transfer function without investigating the details of the entire circuit. Based on this method, the complex impedance up to 30 MHz was measured. The parameters were extracted from the impedance and were compared with other measurements. Using these parameters, we calculated the theoretical limit on an energy resolution and compared it with the measured energy resolution. In this paper, the reasons for the deviation of the measured value from theoretically predicted values will be discussed. 相似文献
819.
Hiroki Kutsuma Makoto Hattori Kenji Kiuchi Satoru Mima Taketo Nagasaki Shugo Oguri Junya Suzuki Osamu Tajima 《Journal of Low Temperature Physics》2018,193(3-4):203-208
Superconducting detectors, such as microwave kinetic inductance detectors (MKIDs), are sensitive to the effects of ambient magnetic fields. There are two effects magnetic fields have on the response of MKIDs; the trapping of magnetic fields inside the superconducting materials degrades the resonator quality, and the time variation of the magnetic fields results in a baseline fluctuation. In the case of radio astronomy, this means the detector must be protected from the geomagnetic field. Here, we construct a test system to evaluate the effects described. We also evaluate the impact of the magnetic shield. We find that a shielding power of 47 dB is necessary in the case of application with a noise equivalent power of \(2.4 \times 10^{-16}\,\text {W}/\sqrt{\text {Hz}}\). We also confirm that the measured shielding power obtained using permalloy films is consistent with simulations based on the finite element method to an accuracy of 1 dB. We have designed magnetic shields for the GroundBIRD CMB telescope using these results. We achieve a sufficient shielding power of 55 dB. 相似文献