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      • KCI등재

        Effects of π‐Electron Systems on Optical Activity of Au11 Clusters Protected by Chiral Diphosphines

        Shinjo Naoaki,Takano Shinjiro,Tsukuda Tatsuya 대한화학회 2021 Bulletin of the Korean Chemical Society Vol.42 No.9

        We systematically examined the effects of π-electron systems on the chiroptical activity of atomically precise gold clusters [Au11(DP)4L2] +, where DP and L represent chiral diphosphines and achiral anionic ligands, respectively. Reducing the distance between the π-electron systems of the chiral DP and the Au11 core enhanced the anisotropy factor of [Au11(DP)4L2] + in the range of 300–450 nm while extension of the π-electron system of the achiral L did not. This tendency supports our previous proposal that the proximity of the chiral π-electron system to the gold core amplifies the optical activity

      • 다중 전압과 모듈 배정을 활용한 온도 고려의 Datapath 합성

        박신조(Park Shinjo),김태환(Kim Taewhan) 한국정보과학회 2007 한국정보과학회 학술발표논문집 Vol.34 No.2B

        칩의 온도 상승에 대한 우려는 최근 점점 가시화되고 있다. 즉, 설계 집적도의 증가에 따른 전력소모 밀도의 증가는 바로 칩 온도 상승으로 이어지고 있다. 이러한 칩 온도 상승은 성능 저하와 패키징 비용 증가 뿐 만 아니라, 칩의 신뢰성, 칩 수명에서도 나쁜 악영향을 초래한다. 본 연구는 칩온도 상승을 억제하기 위한 상위 단계 합성을 제안하고 있다. 구체적으로 본 연구의 핵심은 다중 전압 할당과 연산에 대한 모듈 바인딩(배정)을 동시에 고려한 새로운 저온도 설계 기법을 시도한다. 과거의 이중 threshold 전압 할당과 모듈 바인딩은 각각 누설 전류와 동적 전류를 줄이기 위해 적용된 반면 본 연구는 온도 최소화 측면에서 연구를 시도한 점에서 다른 설계 가능성을 보여 준다고 하겠다.

      • SCIESCOPUSKCI등재

        The Inheritance of Jumping Activity in Reciprocal Cross of Two Subspecies of Mice

        Kurnianto, E.,Shinjo, A.,Suga, D. Asian Australasian Association of Animal Productio 2000 Animal Bioscience Vol.13 No.6

        The objective of this study was to describe the nature of the inheritance of jumping as a behavioral trait and to analyze quantitatively the jumping height as a measure of vigor in two subspecies of mice. Two subspecies of mice, Yonakuni wild mouse (Y) and $CF_{{\sharp}1}$ laboratory mouse (C), were used as the parental types. Reciprocal mating between these two subspecies was made to produce subsequently the first and second generations. The first generation was $F_1$ (YC) resulting from $Y\;male{\times}C\;female$, and $F_1{^\prime}$ (CY) from $C\;male{\times}Y\;female$. The second generation $F_2$ (YCYC) was from mating $F_1{\times}F_1$ and $F_2{^\prime}$ (CYCY) from $F_1{^\prime}{\times}F_1{^\prime}$. Individuals were treated with a set of direct current shock apparatus at six weeks of age to evoke jumping. The results showed that the ratio between jumping and non jumping mice (J: NJ) for C was 0%:100% (0:1), which means that all C did not jump throughout the experiment, whereas Y was 68%:32% (2:1); and the $F_1$ and $F_2$ showed 65%:35% (2:1) and 51%:49% (1:1), respectively. All $F_1{^\prime}$ and $F_2{^\prime}$ individuals jumped as indicated by the ratio 100%:0% (1:0) for both these two genetic groups. Of the jumped mice, average height of the first three jumping observed for pooled sexes in Y, $F_1$, $F_2$, $F_1{^\prime}$ and $F_2{^\prime}$ were 19.3 cm, 19.3 cm, 18.0 cm, 19.9 cm and 16.4 cm, respectively. The distribution of jumping height showed a tendency to be a normal distribution. The jumping activity and jumping height may be affected by some major genes and polygenes, respectively.

      • SCIESCOPUSKCI등재

        Magnetic Orientations of Bull Sperm Treated by DTT or Heparin

        Suga, D.,Shinjo, A.,Kumianto, E.,Nakada, T. Asian Australasian Association of Animal Productio 2000 Animal Bioscience Vol.13 No.1

        This paper describes the magnetic orientation of the intact and demembranated bull sperm treated by DTT or heparin in a 5,400 G static field. Semen samples collected from four bulls (Japanese Black) were mixed to the same sperm density. One percentage triton X-100 was used to extract the plasma membrane. The intact and demembranated sperm suspensions were treated with 20, 200, 2,000 mM DTT, 100, 1,000 or 10,000 units heparin solutions at $4{^{\circ}C}$ for 6 days. The decondensation of the sperm nuclei treated by DTT or heparin was examined by measuring the sperm head area at 1, 3, and 6 days. After measuring the area, each sperm sample was exposed to a 5,400 G static magnetic field generated by Nd-Fe-B permanent magnets for 24 hours at room temperature. Results showed that the decondensation of bull sperm nuclei was not induced by the heparin treatment, however, incomplete decondensation was induced by the DTT treatment. During the magnetic orientation, bull sperms treated by DTT or heparin had low percentages of long axis perpendicular to the magnetic lines of force. However, different aspects were obtained for long axis perpendicular orientations following treatment of DTT or heparin. Through the DTT treatment, the decline of long axis perpendicularly oriented percentages was due to the increase of long axis parallel orientation with the head of the flat plane perpendicular to the magnetic lines of force, whereas, using the heparin treatment, the decline of long axis perpendicular orientation was due to the increment of long axis parallel orientation with the head of the flat plane parallel to the magnetic lines of force. Also, percentages of the head of the flat plane perpendicular were decreased by the heparin treatment. These findings suggest that maintaining the structure of protamine in the chromatin is necessary for the sperm head to orient with its flat plane perpendicular, and maintaining the disulfide bond in the chromatin is necessary for the long axis of sperm to orient perpendicularly.

      • SCIESCOPUSKCI등재

        Average Direct and Maternal Genetic Effects and Heterosis Effects on Body Weight in Two Subspecies of Mice

        Kurnianto, Edy,Shinjo, Akihisa,Suga, Daisuke Asian Australasian Association of Animal Productio 1998 Animal Bioscience Vol.11 No.5

        Data on body weights were analyzed in the four genetic groups from all possible crosses of two subspecies of mice to estimate average direct genetic effects (ADGE), average maternal genetic effects (AMGE) and heterotic effect (HE). The genetic groups used were $CF_{{\sharp}1}$ laboratory mouse (Mus musculus domesticus), Yonakuni wild mouse (Yk, Mus musculus molossinus yonakuni) and two reciprocal $F_1$ crosses of them, CY and YC. First symbol in the reciprocal $F_1$ represent subspecies of dam. Body weight at 1 (Wk1), 3 (Wk3), 6 (Wk6) and 10 weeks of age (Wk10) were analyzed from 258 mice of the four genetic groups. The model used to evaluate body weights included main effects of genetic group and sex, and interaction effect between genetic group and sex. The ADGE and the AMGE were estimated as deviations of Yk from $CF_{{\sharp}1}$. The HE was estimated from the differences between the reciprocal $F_1$ and the midparent mean. Results of this study showed that all effects, except sex and interaction between genetic group and sex at Wk1 and Wk3, were highly significant source variation (p < 0.01). The ADGE were positive and highly significant (p < 0.01) at all ages studied for both sexes, while the AMGE were highly significant at Wk3, Wk6 and Wk10. The ADGE were larger in contributing effect on body weight differences than the AMGE. The positive value of the HE were observed at all ages for males, while for females the positive effects occured from birth through weaning.

      • SCIESCOPUSKCI등재

        Multiphasic Analysis of Growth Curve of Body Weight in Mice

        Kurnianto, E.,Shinjo, A.,Suga, D. Asian Australasian Association of Animal Productio 1999 Animal Bioscience Vol.12 No.3

        The present study describes the analysis of the multiphasic growth function (MGF) to body weight in laboratory and wild mice. Three genetic groups of laboratory mice (Mus musculus domesticus) designated $CF_{{\sharp}1}$, C3H/HeNCrj and C57BL/6NCrj, and a genetic group of Yonakuni wild mice (Mus musculus molossinus yonakuni, Yk) were used. Mean body weights of each genetic group-sex subclass from birth to 69 days of age taken at 3-day intervals were analyzed by a monophasic, diphasic and triphasic functions for describing growth patterns. A comparison among the three functions of the MGF was based on the goodness-of-fit criteria: residual standard deviation (RSD), adjusted R-square (Adj $R^2$) and Akaike's information criterion (AIC). Result of this study indicated that body weight averaged heavier for males than for females. Among the four genetic groups within both sexes, $CF_{{\sharp}1}$ showed the highest, subsequent followed by C3H/HeNCrj, C57BL/6NCrj and Yk. Comparison among the three functions revealed that the triphasic function was the best fit to growth data, with the lowest RSD, the highest Adj $R^2$ and the lowest AIC, for the four genetic groups. For the triphasic function, RSD within each genetic group-sex subclass was similar for males and females. Adj $R^2$ was 0.999 for all genetic group-sex subclasses. AIC for laboratory mice males and females ranged from -70.48 to 66.50 and from -92.81 to -68.64, respectively; whereas for Yk wild mice males was -74.29 and females -78.42.

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