The mechanism for directional hearing in fish.

Locating sound sources such as prey or predators is critical for survival in many vertebrates. Terrestrial vertebrates locate sources by measuring the time delay and intensity difference of sound pressure at each ear. Underwater, however, the physics of sound makes interaural cues very small, suggesting that directional hearing in fish should be nearly impossible.

Light-induced stress and work in photomechanical materials.

Increasingly important photomechanical materials produce stress and mechanical work when illuminated. We propose experimentally accessible performance metrics for photostress and photowork, enabling comparison of materials performance. We relate these metrics to material properties, providing a framework for the design and optimization of photomechanical materials.

Fractal properties of lysozyme: a neutron scattering study.

The spatial structure and dynamics of hen egg white lysozyme have been investigated by small-angle and inelastic neutron scattering. Analysis of the results was carried using the fractal approach, which allowed determination of the fractal and fracton dimensions of lysozyme, i.e.

[The diagnostic importance of different study methods in the recognition of renovascular hypertension at the prehospital stage].

A comparative study of diagnostic potential of excretory intravenous urography, radionuclide renography and angionephroscintigraphy, renal ultrasonography and ultrasonic dopplerography of renal arteries in prehospital examination for renovascular hypertension made it possible to give preference to the above dopplerography. The latter is able to provide reliable data on renal artery stenosis and genesis of arterial hypertension.

[The possibility of using stress echocardiography for the detection of ischemic heart disease in polyclinics].

The paper presents comparative assessment of various loading ECG tests in outpatient diagnosis of coronary heart disease. Of special importance is simultaneous use of transesophageal pacing and echocardiography (stress echocardiography). High sensitivity and specificity of this method are especially useful in coronary heart disease diagnosis in low-risk groups.