Confirmation of a one-dimensional spin-1/2 Heisenberg system with ferromagnetic first-nearest-neighbor and antiferromagnetic second-nearest-neighbor interactions in Rb2{}_{2}Cu2{}_{2}Mo3{}_{3}O12{}_{12}

We have investigated magnetic properties of Rb$_2$Cu$_2$Mo$_3$O$_{12}$ powder. Temperature dependence of magnetic susceptibility and magnetic-field dependence of magnetization have shown that this cuprate is a model compound of a one-dimensional spin-1/2 Heisenberg system with ferromagnetic first-nearest-neighbor (1NN) and antiferromagnetic second-nearest-neighbor (2NN) competing interactions (competing system). Values of the 1NN and 2NN interactions are estimated as $J_1 = -138$ K and $J_2 = 51$ K ($\alpha \equiv J_2 / J_1 = -0.37$). This value of $\alpha$ suggests that the ground state is a spin-singlet incommensurate state. In spite of relatively large $J_1$ and $J_2$, no magnetic phase transition appears down to 2 K, while an antiferromagnetic transition occurs in other model compounds of the competing system with ferromagnetic 1NN interaction. For that reason, Rb$_2$Cu$_2$Mo$_3$O$_{12}$ is an ideal model compound to study properties of the incommensurate ground state that are unconfirmed experimentally.Comment: 6 pages, 4 figure

Chromosome Scaffold is a Double-Stranded Assembly of Scaffold Proteins

Poonperm, R., Takata, H., Hamano, T. et al. Chromosome Scaffold is a Double-Stranded Assembly of Scaffold Proteins. Sci Rep 5, 11916 (2015). https://doi.org/10.1038/srep11916

Physical Education which Deepens Strategical Recognition by Accepting the Other Senses of Value (2) : Through the Class of Basketball Using ""the Game-stop and Interview"

The purpose of this study is to help students acquision of the ability which this school aims at, through the physical education. The abilities are, ""receipting various senses of values"", ""self-expression and communication"" and""decision-making"". In this study, we carried an approach focusing ""the ability to think scientifically"", ""determination and judgement"" and ""thought and judgement"". We carried out the method of ""the Game-stop and Interview"" for the practical study. As a result, the students' ability of offense and defense in a game was improved and has become much better than last academic year. This result proved that the method of ""the Game-stop and Interview"" was effective to improve the students' recognition for tactics

Positive Transfer Effect of Amygdaloid Kindling in Developing Rats

To study the hypothesis that seizure susceptibility in the young rat brain is higher than that in the adult brain, positive transfer effect (PTE) in amygdaloid kindling in rats was investigated at varing ages: 15 days, 18 days, 28 days, 40 days and 70 days. Although PTE was observed regardless of age, it was more pronounced in weaning rats than in adult rats