42 research outputs found
Polynomial striction algorithms in the detection and determination of the characteristics of non-stationary phenomena
The effectiveness of the algorithm of polynomial striction of the data is examined, and the selection of an algorithm is carried out, according to the results of measurements of the components of the permanent magnetic field in communication sequences from the Venera-9 space vehicle, where the shock waves were recorded. It is shown that the most effective algorithm, according to the coefficient of striction, is the algorithm of the zero order interpolator. Also examined is the increase in effectiveness with the introduction of a variable threshold of comparison. The root-mean-square deviation of the error of regeneration of the data with various thresholds is calculated, and qualitative analysis of the distortions is carried out, having shown a considerable change in the form of the small discontinuities, which may be interpreted as potential interplanetary shock waves
Symmetries of Electrostatic Interaction between DNA Molecules
We study a model for pair interaction of DNA molecules generated by the
discrete dipole moments of base-pairs and the charges of phosphate groups, and
find noncommutative group of eighth order of symmetries that leave
invariant. We classify the minima using group and employ
numerical methods for finding them. The minima may correspond to several
cholesteric phases, as well as phases formed by cross-like conformations of
molecules at an angle close to , "snowflake phase". The results
depend on the effective charge of the phosphate group which can be modified
by the polycations or the ions of metals. The snowflake phase could exist for
above the threshold . Below there could be several cholesteric
phases. Close to the snowflake phase could change into the cholesteric
one at constant distance between adjacent molecules.Comment: 13 pages, 4 figure
Temperature-induced changes of the packing of double-stranded linear DNA molecules in particles of liquid-crystalline dispersions
Anomalous optical activity induced on condensation of different spatial forms of double-chain ring DNA
Structural DNA Nanotechnology: Liquid-Crystalline Approach
The investigation of DNA-based materials attracts attention of
scientists from various Laboratories because this is definitely an emerging
area in physics, molecular biology, biotechnology, biosensorics,
nanobiotechnology as well as in material science.
This book compares two different approaches in the structural DNA
nanotechnology, i.e. \u201chybridization\u201d approach and \u201cliquid-crystalline
approach\u201d.
The book reviews the state-of-the art in the fundamental studies of
liquid-crystalline state of double-stranded DNA molecules appeared as a
result of their phase exclusion from polymer-containing water-salt
solutions.
The results presented in this review demonstrate how the fundamental
data obtained when studying the physico-chemical properties of doublestranded
DNA liquid-crystalline dispersions can be used as a background
for induction of a \u201cliquid\u201d- \u201crigid\u201d state transition, i.e. for the design of
novel types of \u201crigid\u201d DNA nanoconstructions carrying various \u201cguest\u201d
molecules which display unique properties of practical importance