Regulating Morphology and Composition of Laser-Induced Periodic Structures on Titanium Films with Femtosecond Laser Wavelength and Ambient Environment.

Recently, highly uniform thermochemical laser-induced periodic surface structures (TLIPSS) have attracted significant research attention due to their practical applicability for upscalable fabrication of periodic surface morphologies important for surface functionalization, diffraction optics, sensors, etc. When processed by femtosecond (fs) laser pulses in oxygen-containing environments, TLIPSS are formed on the material surface as parallel protrusions upon local oxidation in the maxima of the periodic intensity pattern coming from interference of the incident and scattered waves. From an application point of view, it is important to control both the TLIPSS period and nanoscale morphology of the formed protrusions that can be expectedly achieved by scalable shrinkage of the laser-processing wavelength as well as by varying the ambient environment.

Effect of low-energy laser irradiation on the area of experimental myocardial infarction, lipid peroxidation, and hemoglobin affinity for oxygen.

The mechanism of antiischemic effect of low-energy laser radiation was studied in rats with experimental myocardial infarction taking into consideration the effect of laser on hemoglobin affinity for oxygen and intensity of lipid peroxidation. Low-energy laser irradiation for 15 min in vitro decreased the area of myocardial infarction, slightly reduced hemoglobin affinity for oxygen, and inhibited lipid peroxidation. Short-term low-energy laser irradiation did not reduce the area of necrosis, initiated lipid peroxidation, and increased superoxide dismutase activity.

[Role of electrolytes in the pathogenesis of arterial spasm and muscle cramps in varicose veins of the lower limbs].

The blood magnesium and calcium content and the blood flow in the limbs was studied in 68 patients suffering from varicosity, 42 of whom had trophic ulcers of the legs. It was established that diminished content of magnesium in blood serum contributes to the development of hypercalcemia, spasm of arterioles, and the occurrence of muscular convulsions and trophic disorders and thus plays an essential role in the pathogenesis of changes of the blood flow and trophic disorders. Administration of magnesium preparations in the preoperative period improved circulation in the limb and relieved muscular convulsions completely.