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From this study, it is suggested a sedative effect of linalool-rich rosewood oil that could, at least in part, be explained by the reduction in action potential amplitude that provokes a decrease in neuronal excitability.

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Neutron-scattering studies (elastic and quasielastic) have been made on Feo»Zno 69F2, both at H =0 and in fields H & 5 T collinear with the unique axis. (For the Fe Zn, "Fe& system x~= 0.24. ) The H =0 state exhibits antiferromagnetic (AF) long-range order (LRO) and characteristic random-exhange-Isingmodel (REIM) critical behavior, but the degree of ordering is a function of the rate of cooling through the transition T& =19.8 K. This is indicative of strong dynamical e8'ects on the approach to equilibrium. Two field regions are to be distinguished. For 0(H (1.5 T the transition to AF LRO exhibits REIMtorandom-field-Ising-model (RFIM) crossover scaling behavior, in both the transition temperature

It is well known that the diluted antiferromagnet FexZn1−xF2 under an external field is a prototype random field Ising model system (RFIM) when the concentration x is larger than ≂0.4. Here we show that as x decreases there is a crossover to spin-glass (SG) behavior. For x=0.25 the dc magnetization has irreversibility, metastability, and remanence typical of a canonical SG whereas for x=0.48 they are characteristic of a RFIM system. The ac susceptibility also shows completely diverse behavior for x=0.25 and 0.48, characteristic of SG and RFIM system, respectively. The SG nature of the x=0.25 sample is confirmed by the critical behavior of the nonlinear dc susceptibility above the SG freezing temperature T≂10 K. Finally, for x=0.31 there is a temperature dependent crossover from RFIM to SG behavior.