Novel relativistic plasma excitations in a gated two-dimensional electron system.

The microwave response of a two-dimensional electron system (2DES) covered by a conducting top gate is investigated in the relativistic regime for which the 2D conductivity σ_{2D}>c/2π. Weakly damped plasma waves are excited in the gated region of the 2DES. The frequency and amplitude of the resulting plasma excitations show a very unusual dependence on the magnetic field, conductivity, gate geometry, and separation from the 2DES.

Magneto-optical response of 3d-decorated polyoxomolybdates with ε-Keggin structure.

A family of virtually isostructural tetra-capped ε-Keggin-type polyoxomolybdate(V) cluster compounds, [Mo12(V)O28(μ(2)–OH)10(μ(3)–OH)2{M(II)(H2O)3}4]·nH2O ({M4(II)Mo12(V)}, M = Ni, Co), exhibits magnetic-field-dependent optical response in their electronic absorption spectra in the 0–33 T range. On the basis of Effective Hamiltonian Crystal Field calculations, we find that the observed field-induced decrease in reflectance of these compounds can be related to the formally spin-forbidden on-site d–d excitations. We tentatively position the observed effect among other known magneto-optical effects and predict that similar features may be found for other {M49(II)Mo12(V)} analogues.

Quantum-dot-based immunochromatographic assay for total IgE in human serum.

To rapidly quantify total immunoglobulin E levels in human serum, we developed a novel quantum-dot-based immunochromatographic assay that employs digital recording of fluorescence. It can detect IgE levels of 5-1000 kU/L, with a coefficient of variation ranging from 2.0 to 9.

[Postoperative complications of gallstone disease in elderly and aged patients].

Here we have analyzed the results of surgical treatment of gallstone disease and its complications in 1208 senior-age patients. In 875 patients planned operations were performed, whereas in 333 patients the interventions were urgent. Post operational complications occurred in 5.

[Laparoscopy at early postoperative intraabdominal bleedings].

Results of treatment of 46 patients with intraabdominal bleeding as complication of abdominal surgery are analyzed. Laparoscopy and ultrasonic diagnosis assisted with earlier diagnosis of complication. Eleven patients underwent repeated surgery at abdominal bleeding with laparoscopic techniques.

[Optic coherent tomography in patients with immature cataract and pseudophakia].

Optic coherent tomography (OCT) was used to examine 14 persons (15 eyes) before and the following day after laser cataract extraction with intraocular lens implantation. There were slight, but statistically significant differences in the quantitative indicators of OCT in the eyes of immature cataract and pseudophakia (a reduction in the minimum retinal thickness in the foveolar area and that in the design volume of the macular area by the order of 1.4% of the baseline value).

[Development of immunopathology in patients with yersinia infection].

Aim: To evaluate clinical significance of changes in IL-6 concentration and neopterin in peripheral blood of patients for prognosis of the course and outcome of yersinia infection (YI).

Material And Methods: Clinical examination and laboratory tests, 1-5-year follow-up were conducted in 68 patients with a cyclic, recurrent and lingering course of the disease. IL-6 and neopterin concentrations were measured in the course of the disease.

[Development of a new technology of photodynamic destruction of newly formed corneal vessels via local administration of photosensitizers].

The purpose of the study was to perfect the procedure, based on the local administration of photosensitizers (PS) into the lumen of vascular trunks, for photodynamic destruction of newly formed corneal vessels. It was performed on 24 rabbits in which corneal intergrowth of newly formed vessels was induced, by applying nine No. 8.

[Cell loss in the posterior corneal epithelium after cataract extraction by Nd:YAG laser with wave length 1.44 mcm].

The purpose of the case study, as described in the paper, was to evaluate the cell loss in the corneal posterior epithelium (CPE) after laser cataract extraction (LCE) by means of a new laser unit designed on the basis of ND:YAG laser with a wave length of 1.44 microns. The conditions of 59 eyes with high (degrees 3-4) and extra high (degree 5) lens density were analyzed preoperatively and 3 months after LCE.

[Intraocular pressure after cataract extraction by Nd:YAG laser with a wave length of 1.44 mcm].

The purpose of the study was to analyze in detail the condition of intraocular pressure (IOP) in cataract extraction performed by means of a new device, which was designed by us and which is based on the use of Nd:YAG laser with a wave length of 1.44 mem. 320 eyes were examined on a randomized basis in 212 patients after laser cataract extraction.

[Fluorescent angiographic evaluation of the iris microcirculation in cataract extraction by Nd:YAG laser with wavelength of 1.44 mcm].

The purpose of the present study is to evaluate the iridial microcirculation by fluorescent iridial angiography after laser cataract extraction by using a new extraction device, i.e. "RAKOT", based on the Nd:YAG-laser with wave length of 1.

[Laser extraction of brown cataracts with an Nd-YAG 1.44 mcm laser].

A total of 172 extractions of brown nucleus cataracts with maximum compactness were carried out using a RAKOT complex of devices, developed by the authors for laser extraction of compact nuclei and based on the use of Nd:YAG laser with a wavelength of 1.44 mu. Brown cataract was effectively destroyed at 200-250 mJ and pulse generation frequency 25 Hz within 9-12 min during the first 20 operations and 4-6 min during subsequent 152 operations.

[Evaluation of the effectiveness of drainage of the abdominal cavity].

In order to generalize the indications for drainage of the abdominal cavity the authors have systematized and subdivided them into one-type groups depending on the aims, (medical, prophylactic) and tasks, which on their opinion can allow the surgeons to better realize the reasons of using this method of treatment and to critically assess it. An analysis of clinical material was made in order to find out the frequency and localization of intraabdominal abscesses and to assess the measures taken for their prevention. It was found that in spite of the abdominal cavity drainage after 1568 operations on emergency indications, abscesses developed in 43 patients.

[The surgical procedure in the Mallory-Weiss syndrome].

The authors dealt with treatment of 112 patients aged 27-70 years with the Mallory-Weiss syndrome. The diagnosis was confirmed by esophagogastroduodenoscopy. Diathermocoagulation was used in order to arrest bleeding.

[Debatable questions regarding acute simple appendicitis and ways of reducing incidence of groundless appendectomies].

An analysis of the diagnosis and operative treatment of 1246 patients with acute appendicitis was used by the authors for considering the causes of groundless appendectomies. The possibilities to reduce the amount of diagnostic errors and improve the surgical strategy for acute simple appendicitis are discussed.

[Diagnosis of fractures by sound].

For the purpose of objective evaluation of the sound diagnosis the authors have generalized an experience of application of four methods of the acoustic diagnosis of bone fractures. There have been compared the efficiency of the auscultatory percussion method, the method of its objectivization by means of measuring devices, the sound diagnosis method, following the pattern of auscultatory percussion and self-sustained oscillation measuring method. There have been noted the high efficiency and up to 98% coincidences with clinico-roentgenologic data in case of application of the sound diagnosis method with the self-sustained oscillation systems.