Dyakonov surface waves in dielectric crystals with negative anisotropy.

Since the initial discovery of Dyakonov surface waves at a flat infinite interface of two dielectrics, at least one of which is , extensive research has been conducted towards their theoretical and experimental studies in materials with positive anisotropy. The potential applications of these waves were initially limited due to the stringent conditions for their existence and the requirement for position anisotropy. In our study, we present the theoretical prediction and experimental observation of a novel type of Dyakonov surface waves that propagate along the flat strip of the interface between two dielectrics with .

Endophytic Bacterial Biofilm-Formers Associated with Antarctic Vascular Plants.

and are the only two vascular plants colonized on the Antarctic continent, which is usually exposed to extreme environments. Endophytic bacteria residing within plant tissues can exhibit diverse adaptations that contribute to their ecological success and potential benefits for their plant hosts. This study aimed to characterize 12 endophytic bacterial strains isolated from these plants, focusing on their ecological adaptations and functional roles like plant growth promotion, antifungal activities, tolerance to salt and low-carbon environments, wide temperature range, and biofilm formation.

Complete photonic bandgap in a low-index two-dimensional quasicrystalline structure.

A bandgap in the continuum spectrum of photons in addition to its basic physical significance has strong potential for applications. Analogous to semiconductor crystals for electrons, periodic dielectric structures named photonic crystals were proposed to control photon flux propagation. In our search for low refractive index (RI) structures with a photonic bandgap, initial research efforts were focused on photonic crystal design, while aperiodic structures allow lower values of refractive index contrast to sustain a photonic bandgap.

Metal-based nanoparticles: an alternative treatment for biofilm infection in hard-to-heal wounds.

Metal-based nanoparticles (MNPs) are promoted as effective compounds in the treatment of bacterial infections and as possible alternatives to antibiotics. These MNPs are known to affect a broad spectrum of microorganisms using a multitude of strategies, including the induction of reactive oxygen species and interaction with the inner structures of the bacterial cells. The aim of this review was to summarise the latest studies about the effect of metal-based nanoparticles on pathogenic bacterial biofilm formed in wounds, using the examples of Gram-positive bacterium and Gram-negative bacterium , as well as provide an overview of possible clinical applications.

The Prevalence of Tick-Borne Encephalitis Virus in Wild Rodents Captured in Tick-Borne Encephalitis Foci in Highly Endemic Lithuania.

Wild rodents are considered to be one of the most important TBEV-amplifying reservoir hosts; therefore, they may be suitable for foci detection studies. To investigate the effectiveness of viral RNA detection in wild rodents for suspected TBEV foci confirmation, we trapped small rodents ( = 139) in various locations in Lithuania where TBEV was previously detected in questing ticks. Murine neuroblastoma Neuro-2a cells were inoculated with each rodent sample to maximize the chances of detecting viral RNA in rodent samples.

Phylogenetic characterisation of tick-borne encephalitis virus from Lithuania.

The Baltic states are the region in Europe where tick-borne encephalitis (TBE) is most endemic. The highest notification rate of TBE cases is reported in Lithuania, where the incidence of TBE has significantly increased since 1992. A recent study reported 0.

Whole-Genome Shotgun Sequence of Bacillus mycoides Strain U53, a Psychrotolerant Bacterium Isolated from the Sakhalin Region in Russia.

The shotgun genome sequence of strain U53, a psychrotolerant bacterium that was isolated from soil in Russia, is characterized. The bacterial genome is 5,710,017 bp long and is predicted to have 5,847 genes. The GC content is 35.

Prevalence of tick-borne encephalitis virus in questing Dermacentor reticulatus and Ixodes ricinus ticks in Lithuania.

The Baltic States are the region in Europe where tick-borne encephalitis (TBE) is most endemic, with one-third of the European TBE cases detected in Lithuania, Latvia and Estonia. With the Czech Republic and Germany, Lithuania has among the highest population incidences of TBE. Ticks from the Ixodidae family are the main vectors of the TBE virus (TBEV) in Europe.

Agrobacterium rhizogenes-mediated transformation enhances the antioxidant potential of Artemisia tilesii Ledeb.

Plants belonging to the genus Artemisia L. have been used for medicinal purposes since ancient times. These aromatic plants produce and accumulate a wide range of potent secondary metabolites, many of which have shown antioxidant, antiparasitic, antimicrobial, anti-inflammatory, and even anticancer activities.

[SANITARY SIGNIFICANCE OF SOIL SEA COASTS].

There was investigated the dynamics of growth of Listeria monocytogenes and Yersinia pseudotuberculosis in soils of sea coast (mid-flight and maritime soils). These bacteria were shown to reproduced well in all researched soils, preferring nevertheless maritime soils. The content of the humus was determined to be the one of the limiting factors restricting the multiplication of pathogenic bacteria in studied soils.

[Effect of T-lymphocytes and interferon-gamma on the stages of multicellular tumor spheroids formation in vitro].

In our work we studied the effect of T lymphocytes and interferon-gamma on the vital activity of the breast cancer cells population and formation of multicellular tumor spheroids. We demonstrated the stages of multicellular tumor spheroids formation and the possible ways to implement antitumor influence of T lymphocytes and interferon-gamma through a change in estrogen receptor and the epidermal growth factor receptor expression. Our results shown a correlation between the type of humoral influance, the degree of expression of estrogen receptor and epidermal growth factor receptor and the intensity of tumor microaggregates formation.

Whole-body vibration improves functional recovery in spinal cord injured rats.

Whole-body vibration (WBV) is a relatively novel form of exercise used to improve neuromuscular performance in healthy individuals. Its usefulness as a therapy for patients with neurological disorders, in particular spinal cord injury (SCI), has received little attention in clinical settings and, surprisingly, even less in animal SCI models. We performed severe compression SCI at a low-thoracic level in Wistar rats followed by daily WBV starting 7 (10 rats) or 14 (10 rats) days after injury (WBV7 and WBV14, respectively) and continued over a 12-week post-injury period.

[Search for new types of raw materials for antibacterial drugs].

Antibacterial properties of the mycelium culture of Fomitopsis officinalis (Vill.: Fr.) Bondartsev et Singer were investigated.

[Effect of volatile metabolites from germinating seeds on the reproduction of the bacteria Listeria monocytogenes and Yersinia pseudotuberculosis].

The biological activity of volatile metabolites of germinating seeds of cabbage (Brassica oleacia), carrot (Daukus carota), salad (Lactuca sativa), and corn (Zea mays L.) against Listeria monocytogenes and Yersinia pseudotuberculosis was studied. It was shown that volatile metabolites are transfer factors and can be the sole carbon and energy source for these bacteria.

[Kinetics of growth 2-D and 3-D cell models under influence of microenvironment].

A cocultivation system was developed to investigate the interactions between MCF-7 breast cancer epithelial cells and MT-4 (line human T-cell leukemia) by paracrine mechanism (no contact cocultivation). Viability and proliferation were determined in two fractions of MCF-7 cells from spheroid culture and monolayer. It has been shown that the influence of MT-4 reduced the number of cells MCF-7 in fraction of adhesive cells and did not influence on the suspension fraction.

[Cytoprotective effect of neuropeptides on immunocompetent cells (in vitro study)].

Effects of the nootropic neuropeptide drugs cerebrolysin (Ebewe, Austria) and cortexin (Geterofarm, Russia) on the immunocompetent cells (T-lymphocytes of the MT-4 cell line and B-lymphocytes of the Raji cell line) were studied in vitro. The cell viability was evaluated using the MTT test by counting living and dead cells upon incubation under various conditions with a vital stain (Trypan Blue). It is established that cerebrolysin exhibits cytoprotective properties with respect to both T- and B-lymphocytes and favors the survival of immunocompetent cells.

[Character of interactions of saprophytic soil microflora via gaseous metabolites].

The character of interaction between saprophytic soil bacteria via gaseous metabolites was studied. It was established that, at the metabolic level, a diverse character of interspecies interrelationships between bacteria exist, directly influencing their reproduction and preservation in soil. Volatile compounds produced by bacteria are able to act as both intra- and interspecies regulators of microbial communities.

[Influence of different types of mineral fertilizers on reproduction of Listeria monocytogenes in soil].

Influence of mineral fertilizers on the reproduction of Listeria monocytogenes in soil ecosystems under different temperatures (4-6 degrees C and 20-22 degrees C) was studied. Application of the fertilizers favored preservation and active reproduction of L. monocytogenes in brown podzolic soil and brown forest soil.

[Influence of chemical and physical characteristics of seashore soils in Primorsky Region on preservation and reproduction of Listeria and Yersinia].

Influence of chemical and physical characteristics of two types of seashore soils (tidal marsh and maritime meadow soils) in Primorsky region on reproduction of Listeria monocytogenes and Yersinia pseudotuberculosis was studied. Results of experiments proved the possibility of preservation and active reproduction of these bacteria in studied soils. Characteristics of maritime meadow soil are more favorable for mentioned microorganisms than tidal march soil that located closer to the sea.

[Influence of gaseous metabolites of soil bacteria on the multiplication of Listeria monocytogenes and Yersinia pseudotuberculosis].

The influence of gaseous metabolites of saprophytic soil bacteria on the growth and multiplication of L. monocytogenes and Y. pseudotuberculosis was studied.

[Influence of volatile metabolites of saprophytic soil microflora on the propagation of pathogenic bacteria].

The influence of volatile metabolites of saprophytic soil microflora on the propagation of Listeria monocytogenes and Yersinia pseudotuberculosis is shown. Different character of interspecific relationships between bacteria, influencing their propagation, can be observed on the metabolic level. Volatile compounds produced by microorganisms are capable to act as both intra- and interspecific regulators of microbial communities.

[Effect of organic composition of humic acids on Enterobacteria multiplication].

Enterobacteria have been found to be capable of active multiplication in humic acids isolated from bentonite clays containing carbohydrates, lipids and proteins. Humic acids fractions have been found to be heterogeneous by their molecular weight and organic composition; consequently, they have been found to produce different influence in the multiplication of bacteria.

[Local blood flow into tumors during artificial hyperglycemia].

The blood flow in the rat Guerin carcinoma was measured by the hydrogen clearance method. It was shown that the blood flow in the tumour tissue decreased almost 3.5 times to the 3 hours of the intravenous glucose infusion at a dose of 80 mg X kg-1 X min-1.

[Determination of the pH of solid tumors].

The design and production technique of pH-electrode for measuring pH in solid tissues are described. Main characteristics of the pH electrode are determined: external diameter 0.25-0.