Finding False Paths in Sequential Circuits

Russian Physics Journal - Method of finding false paths in sequential circuits is developed. In contrast with heuristic approaches currently used abroad, the precise method based on applying...     

To the Investigation of Plane Wave Propagation in an Elastic Anisotropic Media by a Recursive Operator Method

A solution of the equations of motion of a 3D anisotropic elastic medium without determining the roots of the determinant (secular) equation is obtained by a recursive operator method. A relationship between such solutions and classical solutions is established. The possibility of solving initial–boundary value problems for plane waves is considered. An example and comparative graphs of the solutions are given.     

Numerical simulation of a flow past a triangular sail-type blade of a wind generator using the ANSYS FLUENT software package

An air flow past a single triangular sail-type blade of a wind turbine is analyzed by numerical simulation for low velocities of the incoming flow. The results of numerical simulation indicate a monotonic increase in the drag force and the lift force as functions of the incoming flow; empirical dependences of these quantities are obtained.     

Extraction of ethylene glycol from aqueous salt solutions

A method is proposed for extracting ethylene glycol from aqueous salt solutions by dialysis through ion-exchange membranes, based on the Donnan exclusion of the electrolyte. Dialysis is performed in the continuous and batch modes. It is found that the batch mode of dialysis is more effective for extracting ethylene glycol from its aqueous salt solutions. The effect of the ionic form of the membrane on ethylene glycol fluxes is explained through computer simulation.     

Synthesis and investigation of antiseptic rosin-based compositions

The results of obtaining and studying the properties of rosins modified with diamines were reported. Fungicidal properties of the resulting products were examined. The possibility of using them in impregnations to protect cellulose rope yarn and wood from mold, wood-staining and wood-destroying fungi.     

Properties and <Emphasis Type="Italic">N</Emphasis>-glycosylation of recombinant endoglucanase II from <Emphasis Type="Italic">Penicillium verruculosum</Emphasis>

Cellulases are the main components of enzyme complexes used in biotransformation processes of plant raw materials into valuable commercial products. Endoglucanase II (EG II) from the Penicillium verruculosum fungus was cloned into Penicillium canescens. The homogeneous recombinant EGII form is isolated and its properties are studied in comparison with the native enzyme. The N-glycosylation sites and the structure of the N-linked glycans are been determined using mass spectrometry. The biochemical and catalytic properties, as well as the N-glycosylation type of the obtained recombinant EGII form, appear to be close to the native enzyme. At the two potential N-glycosylation sites (N42 and N194) of both forms of the enzyme, N-linked high mannose glycans (or their enzymatic “trimming” products) according to the general formula (Man)_1–9(GlcNAc)₂ are detected. No glycosylation is found at the third potential site (N19).     

The Effect of Mechanical Treatment on Colloidal and Chemical Properties and Reactivity of Powdered Cellulose

The effect of mechanical activation on colloidal and chemical properties of aqueous dispersions of powdered cellulose (particle size, electrokinetic parameters, surface electrical properties, adsorption, etc.) and its solubility in a methylmorpholine N-oxide monohydrate–dimethyl sulfoxide mixture is studied. A rise in the number of mechanical treatment cycles increases the surface charge density, adsorbability, and solubility of cellulose, but decreases particle size and electrophoretic mobility, as well as the viscosity of cellulose solutions due to a reduction in the degree of cellulose polymerization, development of microporosity, and a rise in the internal surface area of polymer particles as a result of their disintegration.     

Solutions using the Recursive Operator Method for the Dynamic Equations of Heat and Mass Transfer in Hardening Concrete under Heat Treatment in a Heating Chamber

A recursive operator method was used to obtain a general solution of the system of linearized differential equations of heat and mass transfer in hardening concrete in a heating chamber. The solution contains arbitrary analytic functions determined from the boundary and initial conditions.