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Achievements and prospects of PPTR-method for monitoring Icontrol of laser treatment in surgery purposes are presented. Connection of output laser parameters and ones of irradiated zone in tissue with parameters of measured thermal emission from irradiated tissue are analysed. There are presented the results of investigations of the high power laser-tissue interaction and of the processes of tissue destruction stimulated by middle-infrared-range pulsed lasers radiation in different sorts of tissues carried out by PPTR-technique. PPTR and Laser Mass-Spectrometry are united in study of evolution of tissue destruction under action of power CO2 laser. The evolution of thermal signal and, correspondingly, temperature in tissue under single laser pulse treatment with rise of energy density are obtained. Method of the temperature stroboscopy which allows to see very fast tissue heating stimulated by pulsed laser treatment more elaborate are presented.

A few results of our study of two-dimensional electron system (2DES) in low magnetic fields in GaAs/GaAlAs heterostructures by cyclotron resonance (CR) and photoconductivity techniques are presented. We have first discovered "CR-vanishing effect" in 2DES as well-defined crevasse on CR line in low magnetic fields, when Hall resistance is not quantized. "CR-vanishing effect" indicates vanishing longitudinal resistance & conductivity in these magnetic fields. Observed "CR-vanishing effect" demonstrates new correlated state of electrons in 2DES.

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