Evidence for a quasi-two-dimensional proton glass state in Cs5H3(SO4)(4); xH(2)O Crystals.

We describe damping of hypersonic and ultrasonic longitudinal acoustic (LA) phonons in crystals of Cs 5H (3)(SO (4))(4);xH 2O (PCHS) between 100 and 360 K. The damping of LA phonons exhibits strong dispersion caused by relaxation processes in the region of transformation into the glasslike phase (T(g) approximately 260 K). Near T(g) the damping of ultrasonic phonons propagating in the basal plane reflects the cooperative freezing of acid protons.

[A modification of the leukocyte migration inhibition test in vivo].

Estimation of the degree of leukocyte migration inhibition in the oral cavity, following exposure to allergen solution, is a test widely used to assess a subject's allergy to drugs. To simplify this test and make it more effective, the authors suggest placing the samples in plate wells and drying them there; optically transparent polystyrene plates for enzyme immunoassay are employed. Effective adsorption of the cells on the carrier and the possibility of analyzing the samples with the help of multiple magnification permit a reliable detection of the migration inhibition.