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Eilenberg proved that if a compact space X admits a zero-dimensional map f :X → Y , where Y is m-dimensional, then there exists a map h :X → I m+1 such that f × h :X → Y × I m+1 is an embedding. In this paper we prove generalizations of this result for σ-compact subsets of arbitrary spaces. An example of a compact space X and of a zero-dimensional σ-compact… (More)
It has been shown by an X-ray structural analysis that the amino acid residues Ala198, which are located in the coenzyme-binding domain of NAD(+)-dependent formate dehydrogenases (EC 220.127.116.11., FDH) from bacteria Pseudomonas sp.101 and Moraxella sp. C-1 (PseFDH and MorFDH, respectively), have non-optimal values of the angles ψ and φ. These residues were… (More)
We show that the n-homotopy category MENG n of connected (n+1)-dimensional Menger manifolds is isomorphic to the homotopy category HILBC n of connected Hilbert cube manifolds whose k-dimensional homotopy groups are trivial for each k ≥ n + 1.
It is shown that for every n ≥ 2 there exists an n-dimensional locally connected Polish space with Dimensionsgrad 1.
We construct under the Continuum Hypothesis an example of a compact space no finite power of which contains an infinite closed subset that is of finite dimension greater than 0. This is a partial answer to a question of the third author.
The effect of different concentrations of protein tyrosine kinase inhibitor, genistein and serine/threonine protein kinase inhibitor, trifluoperazine, on the frequency of Agrobacterium-mediated transformation of leaf explants of N. tabacum was investigated. The influence of different concentrations of trifluoperazine in the range from 10 to 300 μM was… (More)
During the 6-year observation period from 1998 to 2003 in Moscow there was recorded in 2000-2001 a decrease in the emergence of Streptococcos pneumoniae resistance to many antibacterials, while during the following years the respective index increased. The above dynamics in the resistance emergence was likely due to a decrease in the use of antibiotics in… (More)
The effect of trifluoperazine, the inhibitor of serine/threonine protein kinases, and genistein, the inhibitor of tyrosine protein kinases, on the frequency of Agrobacterium-mediated transformation of angiosperms has been studied on the example of tobacco as a model plant. The study of the effects produced by trifluoperazine in a wide range of… (More)