Nature of Magnetic Excitations in the High-Field Phase of α-RuCl_{3}.

We present comprehensive electron spin resonance (ESR) studies of in-plane oriented single crystals of α-RuCl_{3}, a quasi-two-dimensional material with honeycomb structure, focusing on its high-field spin dynamics. The measurements were performed in magnetic fields up to 16 T, applied along the [110] and [100] directions. Several ESR modes were detected.

[The autonomic mechanisms of the initial manifestations of cerebral circulatory failure and a method for their correction].

Initial manifestations of cerebrovascular insufficiency against the background of atherosclerosis and hypertensive disease were evaluated in 50 sailors. Vegetative dysfunctions in these patients showed different states of the vegetative tone reactivity. It was found that ultraviolet irradiation of the blood produced a positive effect on the course of cerebro-vascular disturbances.

[Ultrasonic dopplerography in the diagnosis of the initial manifestations of insufficiency of the blood supply to the brain].

Sixty-eight patients with cerebrovascular insufficiency received a course of quantum hemotherapy by means of ultraviolet irradiation of the blood. The cerebral hemodynamics was evaluated by ultrasound transcranial dopplerography. It was found that this method may be used for early diagnosis as well as for the control of treatment efficacy.