Results of a study of the reaction products of asphaltene sulfonation with sulfuric acid in various temperature and time ranges have been described. The maximum sulfur content in sulfonated cation ...exchangers at an asphaltene sulfonation temperature of 100 and 120°С and a reaction time of 2 h has been determined. The maximum static exchange capacity of 4.3 meq/g has been found for the products of sulfonation with a sulfuric acid–oleum mixture. The asphaltene-based strongly acidic sulfocationite has been tested in the 2,2-dimethyl-1,3-dioxolane synthesis reaction.
The structure of the proper time of both massive and massless particles is considered in the framework of the pseudoclassical model of supertime. Variants of the introduction of non-commutative ...geometry into the structure of supertime for the models of fundamental particles described in previous publications are proposed.
Products from oxidation of asphaltenes by peracetic acid, sodium periodate, and potassium iodate were analyzed using IR spectroscopy and mass spectrometry. Oxidative destruction of asphaltenes ...increased the aromaticity in their molecular structures and the branching of aliphatic substituents on the polycondensed core. Occluded low-molecular-mass alkanes and cycloalkanes were released during the oxidation. The molecular mass of the asphaltenes changed as a function of the oxidant strength. Asphaltenes fragmented by the acetylene mechanism if the soft oxidant KIO
3
was used.
The kissing number problem asks for the maximal number k(n) of equal size nonoverlapping spheres in n-dimensional space that can touch another sphere of the same size. This problem in dimension three ...was the subject of a famous discussion between Isaac Newton and David Gregory in 1694. In three dimensions the problem was finally solved only in 1953 by Schütte and van der Waerden. In this paper we present a solution of a long-standing problem about the kissing number in four dimensions. Namely, the equality k(4) = 24 is proved. The proof is based on a modification of Delsarte's method.
We show that methylgermane (GeH3CH3) can induce a transition from ⟨111⟩ to ⟨110⟩ oriented growth during the vapor–liquid–solid synthesis of Ge nanowires. This hydride-based chemistry is subsequently ...leveraged to rationally fabricate kinking superstructures based on combinations of ⟨111⟩ and ⟨110⟩ segments. The addition of GeH3CH3 also eliminates sidewall tapering and enables Ge nanowire growth at temperatures exceeding 475 °C, which greatly expands the process window and opens new avenues to create Si/Ge heterostructures.
Connection of Pauli’s principle with the nontrivial structure of the fermion supertime is shown. When supersymmetry is localized as supergravitation, fields of gravitational and exchange interaction ...carriers arise. The exchange interaction quantum of free fermions, being a superpartner of graviton (gravitino), is interpreted as a paulino – the particle responsible for the effect of mutual avoidance of identical fermions.
Every graph G can be embedded in a Euclidean space as a two-distance set. The Euclidean representation number of G is the smallest dimension in which G is representable by such an embedding. We ...consider spherical and J-spherical representation numbers of G and give exact formulas for these numbers using multiplicities of polynomials that are defined by the Cayley–Menger determinant. One of the main results of the paper are explicit formulas for the representation numbers of the join of graphs which are obtained from W. Kuperberg’s type theorem for two-distance sets.
Spin and Extended Supertime Musin, Yu. R.
Russian physics journal,
08/2019, Letnik:
62, Številka:
4
Journal Article
Recenzirano
The structure of an arbitrary finite extension of the time axis to supertime is investigated. A representation of the algebra of supersymmetry directly in terms of the generators of motion of ...supertime is found. An action generalizing supersymmetric models of Ravndal–Di Vecchia–Rumpf particles to higher spins is proposed. A connection of the spin of point particles with the structure of supertime is considered. The existence of composite models of leptons and quarks is substantiated, as is also the observation of only three generations and only for spinor particles (s = 1/2).
We consider generalizations of Gale’s colored KKM lemma and Shapley’s KKMS theorem. It is shown that spaces and covers can be much more general and the boundary KKM rules can be substituted by more ...weaker boundary assumptions.
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