Positronium Laser Cooling via the 1^{3}S-2^{3}P Transition with a Broadband Laser Pulse.

We report on laser cooling of a large fraction of positronium (Ps) in free flight by strongly saturating the 1^{3}S-2^{3}P transition with a broadband, long-pulsed 243 nm alexandrite laser. The ground state Ps cloud is produced in a magnetic and electric field-free environment. We observe two different laser-induced effects.

Energy transfer in Tm,Ho:KYW crystal and diode-pumped microchip laser operation.

An investigation of Tm-Ho energy transfer in Tm(5at.%),Ho(0.4at.

[The effect of social factors on the process of learning complex forms of behavior in adolescent chimpanzees].

Learning behaviour in chimpanzee has been investigated on a group of three animals at the age of 5-6 years. Situation conditioned reflex was elaborated in unrestrained monkeys which were trained to visual discrimination between abstract images of various complexity. Changes in experimental situation significantly affected learning process.

[Evaluation of the results of reconstructive operations in patients with occlusive diseases of the abdominal aorta and its branches].

The article deals with the results of studying regional microcirculation in 550 patients with chronic arterial insufficiency. Radioisotope study of blood flow in the muscles with isotopes 131I or 133Xe before and after muscular exertion, morpho-histological++ study of biopsies from a skeletal muscle, histochemical and ultrastructural study of the microcirculatory channel were carried out. Analysis of the findings made it possible to distinguish, according to the changes in circulation in the tissues, three clinical groups of patients (compensated, subcompensated, and decompensated), to determine the indications and contraindications for various types of reconstructive operations, and to prognosticate with high authenticity the outcome of the disease.