Enhanced subthreshold e+ e- production in short laser pulses.

The emission of e+ e- pairs off a probe photon propagating through a polarized short-pulsed electromagnetic (e.g., laser) wave field is analyzed. A significant increase of the total cross section of pair production in the subthreshold region is found for decreasing laser pulse duration even in the case of moderate laser pulse intensities.

Near-threshold Lambda(1520) production by the gamma(p)-->K{+}Lambda(1520) reaction at forward K+ angles.

Differential cross sections and photon-beam asymmetries for the gamma(p)-->K{+}Lambda(1520) reaction have been measured with linearly polarized photon beams at energies from the threshold to 2.4 GeV at 0.6or=5/2 or by a new reaction process, for example, an interference effect with the phi photoproduction having a similar bump structure in the cross sections.

[Treatment of suppurative diseases of soft tissues by CO2 laser and immobilized trypsin]. / Lechenie gnoinykh zabolevanii miagkikh tkanei CO2-lazerom i immobilizovannym tripsinom.

The results of treatment of 245 patients with purulent diseases of the soft tissues are discussed. The course of the wound process was most favourable with the use of immobilized trypsin on gauze in the management of wounds formed after surgical debridement of purulent foci by means of CO2 laser. The method made it possible to accelerate the processes of necrolysis, provide a stable low level of dissemination of bacteria in the wound tissues, reduce the term of preparation of the wound for the application of secondary sutures and the terms of healing.

[Characteristics of wound process after high-energy laser debridement and enzyme treatment]. / Kharakteristika ranevogo protsessa posle vysokoénergeticheskoi lazernoi obrabotki i fermentativnogo lecheniia.

The results of ++clinico-bacterial examination of 168 patients provide evidence for the efficacy of CO2-laser treatment of a purulent wound; it reduces contamination of the tissues, 1,000-10,000-fold as a result of which surgical debridement of the purulent wound is completed in most cases by the application of a primary suture. The use of immobilized proteolytic enzymes in the postoperative period facilitates further cleansing of the wound, prevents the development of secondary infection, accelerates the change of the wound process to the phase of regeneration, promotes an uneventful postoperative course and healing of the wound within a lesser period as compared to the control group.

[Aseptic laser half-closed anastomoses in surgery on the hollow organs of the gastrointestinal tract]. / Asepticheskie lazernye poluzakrytye anastomozy v khirurgii polykh organov zheludochno-kishechnogo trakta.

The authors have modified the well-known methods of anastomosing between hollow organs of the gastrointestinal tract using radiation and intestinal forceps with narrow branches. The amount of inflammatory and purulent complications decreased.

Near-threshold diffractive psi-meson photoproduction from the proton.

Photoproduction of a phi meson on protons was studied by means of linearly polarized photons at forward angles in the low-energy region from threshold to Egamma = 2.37 GeV. The differential cross sections at t = -|t|min do not increase smoothly as Egamma increases but show a local maximum at around 2.0 GeV. The angular distributions demonstrate that phi mesons are photoproduced predominantly by helicity-conserving processes, and the local maximum is not likely due to unnatural-parity processes.

[Formation of closed aseptic anastomosis of the hollow organs with the use of laser]. / Formirovanie asepticheskogo zakrytogo anastomoza polykh organov s ispol'zovaniem lazera.

The authors modified the method for formation of aseptic anastomosis, using radiation of the CO2-laser and neodymium-doped YAG laser. The techniques for placing the enteroenteric anastomosis, gastroentero- and cholecystojejunoanastomosis are presented. Reduction in incidence of inflammatory and purulent postoperative complications has been achieved.

[A bioluminescent method of determining the sensitivity of microflora to antibiotics]. / Bioliuminestsentnyi metod opredeleniia chuvstvitel'nosti mikroflory k antibiotikam.

A bioluminescent rapid method (a three-hour test) has been developed to assess the susceptibility of microflora to antibiotics. It is based on comparison of intracellular ATP content in a sample (pus) after 3 h incubation at 37 degrees C in liquid culture medium (dilution: sample/culture medium--1:9) on a shaker in the presence and absence (control) of a single antibiotic concentration. A criterion has been offered for quantitative estimation of antibiotic susceptibility of microorganisms. The authors have optimized the measurements of intracellular ATP by the rapid bioluminescent method using immobilized firefly luciferase-based ATP reagent. The results of the method are in good correlation with those of the standard agar diffusion technique.