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Search Results: 1 - 10 of 478481 matches for " Alexander A. Chaihorsky "
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The Spatial Redistribution of Chemical Elements and Their Isotopes in Layered Intrusions Provided by the Gradients of a Temperature, of a Pressure and of a Deformation, Using Lukkulaisvaara Intrusion (North Karelia) as an Example  [PDF]
Alexander Kh. Zilbershtein, Alexander A. Chaihorsky, Vladimir S. Semenov
Open Access Library Journal (OALib Journal) , 2019, DOI: 10.4236/oalib.1105909
Abstract: The spatial local anomalies of the concentration ratios for isotopes 143Nd/144Nd (or εNd) and 87Sr/86S in Lukkulaisvaara intrusion (North Karelia) were discovered. The physical mechanisms and the descriptions of the effect of an arising of those anomalies were developed and presented. The base of the proposed mechanisms is the phenomena of the migration (diffusion) of components, due to the (T, P (or D)) gradients. The description of the processes of an arising of the gradients of a temperature (T), of a pressure (P) and of a deformation (D) in the layered inhomogeneous intrusion during its formation and evolution, were obtained. It was shown that the gradients can induce the spatial redistribution of the chemical elements and their isotopes in the intrusion. The redistribution, in turn, can lead to the observed spatial concentration anomalies for these components. It was first obtained the expressions for the diffusion additions to the isotope’s parameter ε (εNd, in part).
Spin effects govern DNA/RNA nucleotide polymerization  [PDF]
Alexander A. Tulub
Journal of Biophysical Chemistry (JBPC) , 2011, DOI: 10.4236/jbpc.2011.23034
Abstract: A new radical mechanism of nucleotide polymerization is found. The finding is based on the Car-Parrinello molecular dynamics computations at 310 K with an additional spin-spin coupling term for 31P and 1H atoms and a radical pair spin term included. The mechanism is initiated by a creation of a high-energy spin-separated Mg-ATP complex in a triplet state in which the Mg prefers an uncommon chelation to the O2-O3 oxygens of the ATP. The cleavage of the complex produces the .AMP- and .O- radicals. The latter captures a proton from acidic solution (the Zundel cation) that converts it into the .OH radical. The process agrees with the protoncoupled electron transfer (PCET) mechanism. Through interacting with the HO-C3' group of the deoxyribose/ribose the .OH radical captures its hydrogen atom. The process is accompanied by producing water and the .AMP radical. The .AMP- and .AMP radicals then interact yielding a dimer. The described mechanism is easily generalized for a bigger number of adjoining nucleotides and their type. The radical mechanism is highly sensitive to the .AMP-..OH radical pair spin symmetry and the radius of the .OH diffusion. This confines the operation of the radical mechanism: it is applicable to nucleotide polymerization through the HO-C3’ group of deoxyribose/ribose (DNA/RNA polymerization) and inapplicable through the HO-C2’ group of ribose (RNA) . a result that nature has developed over evolution.
Embeddings of Almost Hermitian Manifold in Almost Hyper Hermitian Manifold and Complex (Hypercomplex) Numbers in Riemannian Geometry  [PDF]
Alexander A Ermolitski
Applied Mathematics (AM) , 2014, DOI: 10.4236/am.2014.516238
Abstract: Tubular neighborhoods play an important role in differential topology. We have applied these constructions to geometry of almost Hermitian manifolds. At first, we consider deformations of tensor structures on a normal tubular neighborhood of a submanifold in a Riemannian manifold. Further, an almost hyper Hermitian structure has been constructed on the tangent bundle TM with help of the Riemannian connection of an almost Hermitian structure on a manifold M then, we consider an embedding of the almost Hermitian manifold M in the corresponding normal tubular neighborhood of the null section in the tangent bundle TM equipped with the deformed almost hyper Hermitian structure of the special form. As a result, we have obtained that any Riemannian manifold M of dimension n can be embedded as a totally geodesic submanifold in a Kaehlerian manifold of dimension 2n (Theorem 6) and in a hyper Kaehlerian manifold of dimension 4n (Theorem 7). Such embeddings are “good” from the point of view of Riemannian geometry. They allow solving problems of Riemannian geometry by methods of Kaehlerian geometry (see Section 5 as an example). We can find similar situation in mathematical analysis (real and complex).
New Approach to the Generalized Poincare Conjecture  [PDF]
Alexander A.ki Ermolits
Applied Mathematics (AM) , 2013, DOI: 10.4236/am.2013.49183

Using our proof of the Poincare conjecture in dimension three and the method of mathematical induction a short and transparent proof of the generalized Poincare conjecture (the main theorem below) has been obtained. Main Theorem. Let Mn be a n-dimensional, connected, simply connected, compact, closed, smooth manifold and there exists a smooth finite triangulation on Mn which is coordinated with the smoothness structure of Mn. If Sn is the n-dimensional sphere then the manifolds Mn and Sn are homemorphic.

Paralyzed Warming World
Alexander A??
Amsterdam Law Forum , 2010,
Abstract: Paralyzed Warming World
Epitaxial Ge Growth on Si(111) Covered with Ultrathin SiO2 Films  [PDF]
Alexander A. Shklyaev, Konstantin N. Romanyuk, Alexander V. Latyshev
Journal of Surface Engineered Materials and Advanced Technology (JSEMAT) , 2013, DOI: 10.4236/jsemat.2013.33027

The epitaxial growth of Ge on Si(111) covered with the 0.3 nm thick SiO2 film is studied by scanning tunneling microscopy. Nanoareas of bare Si in the SiO2 film are prepared by Ge deposition at a temperature in the range of 570℃-650℃ due to the formation of volatile SiO and GeO molecules. The surface morphology of Ge layers grown further at 360℃-500℃ is composed of facets and large flat areas with the Ge(111)-c(2 × 8) reconstruction which is typical of unstrained Ge. Orientations of the facets, which depend on the growth temperature, are identified. The growth at 250℃-300℃ produces continuous epitaxial Ge layers on Si(111). A comparison of the surface morphology of Ge layers grown on bare and SiO2-film covered Si(111) surfaces shows a significantly lower Ge-Si intermixing in the latter case due to a reduction in the lattice strain. The found approach to reduce the strain suggests the opportunity of the thin continuous epitaxial Ge layer formation on Si(111).

A Novel Method of Fruit Raw Material Reprocessing  [PDF]
Alexander A. Emelyanov, Konstantin A. Emelyanov
Engineering (ENG) , 2010, DOI: 10.4236/eng.2010.212122
Abstract: We introduced a method of deep resources-economy reprocessing of fruit raw material. Based on the raw material fractionation at decreased temperatures the method results in the production of bioactive food stuffs, which are dry juice and refuse and natural water. The method includes the production of directly extracted juice and pulp refuse, juice evaporation in vacuum with the production of concentrate and natural water, and air drying the concentrate and the refuse. The method is realized for garden strawberry and cucurbit pulp. The mass concentration of solid in the fractions of cucurbit pulp is defined and the specific weight of the fractions are defined. It is shown that the solid of the cucurbit pulp is uniformly allocated between the fractions and amounts 34% for the dry juice, 31% for the dry refuse, and 35% for the natural water. Food and biological values of the cucurbit pulp fractions are determined. It is determined that the cucurbit includes silicium, nickel, and chromium. Silicium is contained only in dry fractions; nickel is present everywhere; chromium is discovered only in the natural water. Food and biological values of the cucurbit pulp are defined and their allocation between the fractions is determined. Separate components concentrations of the solid considerably differ between the fractions. Thus, two thirds of pulp protein is concentrated in the dry juice and a third is concentrated in the refuse. The natural water contains up to 90% of fat and sugar, from a half to two thirds of B-group vitamins, and the bulk of the mineral substances (K, Na, Ca, Mg, S, Co, Cu, Ni, Cr, and Zn), which concentration composes from 73% for potassium up to 100% for chromium.
On The Hardening of The Spectrum of High-Energy Particles Formed in Heavy-Ion Collisions Considered within The Framework of The Hydrodynamic Approach  [PDF]
Alexander T. D’ yachenko, Konstantin A. Gridnev
Journal of Modern Physics (JMP) , 2011, DOI: 10.4236/jmp.2011.21003
Abstract: The emission of high-energy particles in 16O + 197Au collisions at energy 20 MeV / nucleon is considered within the framework of the time evolution of a hot spot taking into account the hydrodynamic compression and expansion stages. In addition, the evaporation of the particles that are formed in the early (hot) stage of the evolution of the hot spot is included in the calculation of the spectrum. This leads to a hardening of the particle spectrum in its high-energy part, which is in agreement with experimental data.
Analysis of Nonlinear Stochastic Systems with Jumps Generated by Erlang Flow of Events  [PDF]
Alexander S. Kozhevnikov, Konstantin A. Rybakov
Open Journal of Applied Sciences (OJAppS) , 2013, DOI: 10.4236/ojapps.2013.31001

In this paper we consider the stochastic systems with jumps (random impulses) generated by Erlang flow of events that lead to discontinuities in paths. These systems may be used in various applications such as a control of complex technical systems, financial mathematics, mathematical biology and medicine. We propose to use a spectral method formalism to the probabilistic analysis problem for the stochastic systems with jumps. This method allows to get a solution of the analysis problem in an explicit form.

Spatial distribution of Coleoptera (Insecta) in the valley forests of the Ussuri Nature Reserve (South Primorye, Russia)  [PDF]
Alexander V. Kuprin, Victorya A. Kharchenko
Open Journal of Ecology (OJE) , 2013, DOI: 10.4236/oje.2013.37053

Five habitat types have been studied in the valley forests of the Ussuri Nature Reserve. The cluster analysis was used to distinguish two types of clusters. The first one combines the anthropogenically modified forest plot, the margin, and the plot of a typical valley broad-leaved tree, while the second one combines the oak forest and the coniferous and broad-leaved valley forest. The greatest number of volant Coleoptera species were observed at the margin of the broad-leaved forest.

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