Development of ecological tourism in protected areas of Russia

The author of the article, based on the views of industry experts, offers activities aimed at the introduction of eco-tourism in protected areas, and considers man-agement practices in ecotourism in these areas. In the article, the author put forward a definition of "eco-tourism", the basic problems of the development of ecotourism in protected areas, proposed a strategy for the optimal functioning of ecotourism, taking into account its profitability, competitiveness, and reduction of negative environmental impacts of mass tourism in protected natural area

Noncoding DNA, isochores and gene expression: nucleosome formation potential

The nucleosome formation potential of introns, intergenic spacers and exons of human genes is shown here to negatively correlate with among-tissues breadth of gene expression. The nucleosome formation potential is also found to negatively correlate with the GC content of genomic sequences; the slope of regression line is steeper in exons compared with noncoding DNA (introns and intergenic spacers). The correlation with GC content is independent of sequence length; in turn, the nucleosome formation potential of introns and intergenic spacers positively (albeit weakly) correlates with sequence length independently of GC content. These findings help explain the functional significance of the isochores (regions differing in GC content) in the human genome as a result of optimization of genomic structure for epigenetic complexity and support the notion that noncoding DNA is important for orderly chromatin condensation and chromatin-mediated suppression of tissue-specific genes

Self-Stimulated Undulator Radiation and its Possible Applications

We investigated the phenomena of self-stimulation of incoherent emission from an undulator installed in the linear accelerator or quasi-isochronous storage ring. We discuss possible applications of these phenomena for the beam physics also.Comment: 14 pages, 4 figure