High-Tc spin superfluidity in antiferromagnets.

We report the observation of the unusual behavior of induction decay signals in antiferromagnetic monocrystals with Suhl-Nakamura interactions. The signals show the formation of the Bose-Einstein condensation (BEC) of magnons and the existence of spin supercurrent, in complete analogy with the spin superfluidity in the superfluid (3)He and the atomic BEC of quantum gases. In the experiments described here, the temperature of the magnon BEC is a thousand times larger than in the superfluid (3)He. It opens a possibility to apply the spin supercurrent for various magnetic spintronics applications.

A novel liquid crystalline system for partial alignment of polar organic molecules.

A new system for partial alignment of polar organic molecules to measure residual dipolar couplings in NMR consists of a 1:1 or a 2:1 mixture of water and DMSO including 3-13% n-alkylpentaethylene glycol as the surfactant. Temperature and concentration dependence of the alignment system are investigated and, as examples, the 13C,1H residual dipolar couplings for the amino acid methionine 1 and for an alpha-methylene-gamma-butyrolactone 2 have been obtained and are compared with those obtained from the alignment media consisting of n-alkylpentaethylene glycol, n-alkyl alcohol and water.

[General approach to designing a device for artificial blood circulation]. / Obshchii podkhod k postroeniiu apparatury iskusstvennogo krovoobrashcheniia.

The systems approach to constructing extracorporeal circulation equipment enhances the university of this equipment by interchangeable choice of its structure, functional parameters and constructive implementation. The authors propose to use in the extracorporeal circulation equipment two (two- and four-pump) perfusion units with two types of constructively interchangeable perfusion pumps of various capacity.