Laboratory investigations of wave-induced transport of plastic debris over a rippled bottom.

Laboratory experiments are conducted in a wave flume to investigate the effect of water waves on the transport of plastic pellets over a rippled bottom. The horizontal velocities of plastic debris are analyzed over the rippled bottom for different wave conditions and plastic elements with different properties. Laboratory investigations determined the characteristic transport patterns of wave-induced plastic debris with a density of ∼2.

Experimental Method for the Measurements and Numerical Investigations of Force Generated on the Rotating Cylinder under Water Flow.

The paper presents the experimental test setup and measurement method of hydrodynamic force generated on the rotating cylinder (rotor) under uniform flow including the free surface effect. The experimental test setup was a unique construction installed in the flume tank equipped with advanced flow generating and measuring systems. The test setup consisted of a bearing mounted platform with rotor drive and sensors measuring the hydrodynamic force.

[Erythrocyte concentrations of adenosine triphosphate (ATP) and magnesium, before and after conservative therapy of lower extremities atherosclerosis].

37 patients with atherosclerosis of lower extremities and the mean claudication distance of 300-500 m (Fontaine 11 degrees) were subjected to pharmacotherapy with pentoxyfilline 600 mg twice daily, and walking exercise tests on a treadmill. The concentrations of ATP and magnesium ions in erythrocytes were assessed in the patients in resting condition, and after standardized walking exercise tests, 6 and 12 weeks since the beginning of therapy. Applied treatment proved beneficial in protecting the patients against depletion of ATP in their erythrocytes.

Inhibitory effect of alpha-globulins of different origin on the cell-mediated immune responses in mice.

alpha-Globulins prepared from different biological sources (human and bovine sera, mouse ascitic fluid, human ovarian cyst fluid) were separated by ion exchange chromatography on DEAE-cellulose into fractions A, B and C. Whereas fractions A and B had no immunosuppressive activity, fraction C injected into mice shortly before antigen administration, but not after, significantly inhibited the contact sensitivity to oxazolone. Single high doses were preferential over divided doses given on several occasions.

Primary immune response to sheep red blood cells in mice treated with immunoregulatory alpha-globulins (IRA).

Alpha-Globulins from human and bovine sera or from mouse ascitic fluid were separated by ion-exchange chromatography on DEAE-cellulose into fractions A, B, and C. Fractions A and B had no immunosuppressive activity; fraction C injected into mice at the time of antigen administration, but not later, significantly reduced the number of anti-SRBC plaque-forming cells in the spleens of experimental animals. Single high dose inhibited the response better than the same doses given on 4 consecutive days.