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이순철,T. Yamamoto.S.Ueki 충남대학교 약학대학 의약품개발연구소 1988 藥學論文集 Vol.4 No.-
Nucleus accumbens septi (NAB), one of mesolimbic system, which anatomically related the limbic system. We an attempted to elucidated emotional changes following bilateral NAB lesions in rats. Caudal, rostral and both areas of NAB were lesioned each in separated animal groups. Furthermore, aggressive behavior induced by NAB rats was investigated in comparison with those induced by olfactory bulbectomized rats and raphe nucleus-lesioned rats. 1) At postoperative day 2, locomotor activity were increased in r-NAB rats but not in c-NAB rats. 2) All rats exhibited hyperirritability and muricide including mouse-eating behavior after NAB lesions. 3) Muricide of NAB rats was significantly supressed by L-DOPA, L-5-HTP and antidepressants, muricide of raphe rats was also significantly inhibited by L-DOPA and L-5-HTP, while that in OB rats was not suppressed. These results suggested that the NAB plays an important role in locomotor activity and aggression. The characteristics of aggressive behavior induced by NAB rats resemble to that of raphe-rats.
WEAR BEHAVIOR OF SiC-PARTICLE REINFORCED ALUMINUM MATRIX COMPOSITES IN VARIOUS ENVIRONMENTS
T. MIYAJIMA,T. YAMAMOTO,Y. IWAI 한국트라이볼로지학회 2002 한국트라이볼로지학회 학술대회 Vol.2002 No.10
Wear behavior of SiC-particle reinforced aluminum matrix composites (MMC) were investigated by pin-on-disk tests in vacuum with various pressures, argon, and air with various levels of humidity. The wear rate of 2024Al and MMC increased in the following order: in a vacuum at 5.0×10?⁴ ㎩, at 1.0㎩, in argon at 0% RH, in argon at 60% RH, in argon at 90% RH, in air at 0% RH, in air at 60% RH and in air at 90% RH. In other words, the influence of environment on wear becomes stronger in the following order: moisture, oxygen, and a combination of moisture and oxygen. In various environments, the difference of the wear rate of 2024Al and MMC was compared. In argon and air at 0% RH, the wear rates of MMC were higher than that of 2024Al. In contrast, in argon and air at 60, 90% RH, the wear rates of MMC were lower than that of 2024Al.
T. Charinpanitkul,P. Limsuwan,C. Chalotorn,N. Sano,T. Yamamoto,P. Tongpram,P. Wongsarivej,A. Soottitantawat,W. Tanthapanichakoon 한국공업화학회 2010 Journal of Industrial and Engineering Chemistry Vol.16 No.1
Synergetic removal of aqueous phenol by decomposition with ozone and adsorption on activated carbon was experimentally investigated. To enhance phenol removal performance, two activated carbons (AC1 and AC2) with BET surface areas of 1106 and 1150 m2 g1 and average pore diameters of 2.3 and 1.7 nm, respectively, were employed. While the slowest initial removal of phenol was achieved with introduction of ozone only, the much better removal of phenol was obtained with utilization of activated carbon with ozone. Some intermediate products, which were detected as total organic carbon (TOC), were found to remain even after phenol was completely decomposed. Regarding to higher mesopore fraction, AC1 could better remove intermediates than AC2. With the synergetic performance of AC1 and ozone it was found that the highest removal of phenol and TOC was up to 100% and 89%, respectively.
Yamamoto, T .,Yamaguchi, M .,Hirota, M .,Inui, H . 대한금속재료학회(대한금속학회) 2000 METALS AND MATERIALS International Vol.6 No.6
Changes in microstructure and their effects on hydrogen sorption properties have been investigated as a function of the number of hydrogen sorption cycles in LaNi_5 and FeTi. For LaNi_5, while the desorption pressure does not significantly depend on the number of cycles, the absorption pressure drastically decreases between the first and second cycles. In addition to severe cracking and pulverization, numerous edge dislocations with Burgers vectors of the 1/3$lt;12 ̄10$gt;-type are introduced during the first absorption cycles. Both the introduction of numerous lattice defects and the formation of severe cracks seem to be completed during the first cycle, resulting in the reproducible P (pressure)-C (composition) characteristics for the subsequent cycles. In contrast, FeTi exhibits ever-changing P-C characteristics with cycle number. The introduction of dislocations with Burgers vectors of the $lt;100$gt;-type in the form of tangles and cracks occurs during each of absorption cycles with the extent to which this occurs being considerably smaller in each of absorption cycles of FeTi than in the first absorption cycle of LaNi_5. The difference in material response to hydrogenation seems to be closely related to the difference in ductility of these two intermetallics.
Modeling of Lithium-Ion Batteries with Constant Phase Element and Butler-Volmer’s Equation
T. Yamahigashi,J. Shimura,K. Shibuya,Y. -H. Wu,K. Shigematsu,T. Hosotani,J. Kuromi,J. Imaoka,M. Yamamoto 전력전자학회 2023 ICPE(ISPE)논문집 Vol.2023 No.-
An equivalent circuit model of lithium-ion batteries which has a nonlinear resistor governed by Butler- Volmer’s equation and a constant phase element was investigated. The current dependence of the real battery could be reproduced well by the contribution of the nonlinear resistor, and the transient response of voltage could be reproduced well by the contribution of the constant phase element.