Morphology of modified hydrolysis lignin

The morphology of hydrolysis lignin was studied. The effect of dimethyl sulfoxide, temperature, and activating additives on the surface characteristics of lignin was examined.     

Restricted Lie (Super)Algebras in Characteristic 3

We give explicit formulas proving that the following Lie (super)algebras are restricted: known exceptional simple vectorial Lie (super)algebras in characteristic 3, deformed Lie (super)algebras with indecomposable Cartan matrix, simple subquotients over an algebraically closed field of characteristic 3 of these (super)algebras (under certain conditions), and deformed divergence-free Lie superalgebras of a certain type with any finite number of indeterminates in any characteristic.     

Influence of the temperature on heat effects of acid-base interactions in aqueous solutions of succinic and tartaric acids

The heat effects of interactions of solutions of succinic and tartaric acids with solutions of HNO₃ and KOH or LiOH are measured over the temperature range 288.15–308.15 K at ionic strengths of 0.5, 1.0, and 1.5 (KNO₃ or LiNO₃). The heat effects of dissociation of the acids are calculated using a Pentium-150 PC with HEAT and RRSU universal software packages. The thermodynamic characteristics of the processes of stepwise dissociation of the oxyacids are determined. The influence of the temperature on the heat effects of the processes of stepwise dissociation of succinic and tartaric acids is discussed.     

Contribution of meson-exchange currents to the electromagnetic structure of the deuteron at high momentum transfers

The leading term of the asymptotic expansion of the contributions of the πNN and ρπγ processes to the electromagnetic form factors of the deuteron at high momentum transfers is calculated. The resulting asymptotic behavior is compared with experimental data obtained at the Thomas Jefferson Laboratory. Constraints on the functional dependence of meson-nucleon vertex functions that ensure a correct asymptotic behavior of deuteron form factors are discussed.     

On a possible estimation of the constituent-quark parameters from Jefferson Lab experiments on the pion form factor

The charge form factor of the pion is calculated for the momentum transfer range of the Jefferson Lab experiments. The approach is based on the instant form of the relativistic Hamiltonian dynamics. It is shown that the form-factor dependence on the choice of the model for the quark wave function in the pion is weak, while the dependence on the constituent-quark mass is rather significant. It is possible to estimate the mass of the constituent quark and the sum of the anomalous magnetic moments of the u- and -quarks from the JLab experiments. Received: 3 April 2000 / Revised version: 25 February 2001 / Published online: 25 April 2001     

Investigation of the solar transition layer and corona by the method of imaging XUV spectroscopy in the terek and res experiments on board the KORONAS-I satellite

The method of imaging XUV spectroscopy was used to study plasma in the transition layer and inner corona of the Sun with temperatures 10⁵–10⁷ K in the TEREK and RES experiments on board KORONAS-I. The observations were carried out in the period from March 12 to July 5, 1994. The spectral images and their correlation with the YOHKOH X-ray images and groundbased observations are important for the study of the physical conditions and modeling of the bulk processes in the quiet Sun plasma, including active regions, corona holes, and overlimb structures.     

Non-Abelian Lie algebroids over jet spaces

We associate Hamiltonian homological evolutionary vector fields – which are the non-Abelian variational Lie algebroids’ differentials – with Lie algebra-valued zero-curvature representations for partial differential equations.