In this work, a model is developed to describe the
formation of streamers, plasmoid, and ball lightning in a
conducting medium. To describe the contribution of the
conductivity currents, we modified the standard
electrostatic equation taking into account the vortex
component of the electric field. As a result of this
generalization, a system of parabolic-type nonlinear
equations is formulated that describes the formation of
streamers, plasma long-lived formations and ball
lightning. As is known, in laboratories it is possible to
create a plasmoid with a lifetime of 300-500 ms and a
diameter of 10-20 cm, which is interpreted as a ball
lightning. With high-speed photography, a complex
structure is detected, consisting of a plasmoid and
surrounding streamers. Within the framework of the
proposed model, problems are posed about the formation
of a plasmoid and the propagation of streamers in an
external electric field. In this model, the plasmoid is
considered to be a long-lived streamer. The range of
parameters in which a plasmoid of spherical shape is
formed is indicated. It is established that there are three
streamer branching mechanisms. The first mechanism is
related to the instability of the front, which leads to the
separation of the head of the streamer into two parts. The
second mechanism is associated with the instability of
the streamer in the base region, which leads to the
branching of the streamer with the formation of a large
number of lateral streamers closing the main channel of
the streamer to the cathode. In numerical experiments,
the third branching mechanism observed in experiments
connected with the branching of the plasmoid in the
cathode region with the closure of the space charge to
the anode through the streamer system was observed.
The results of modeling the evolution of globular
clusters in a scale of hundreds of milliseconds are given.
Plasma exchange recharge modes leading to the
formation of a positive or negative charge of the system
are found

The inverse matrix for the square matrix A of order n
with coefficients of some field exists, as it is known
then and only then, when its determinant is not equal to
zero. If the matrix A has a certain type (certain
structure), then an inverse matrix A-1 should not have
exactly the same structure. Therefore, it is interesting
to describe such square matrices A, which have an
inverse matrix A-1, having the same structure as the
matrix A, under certain conditions. For example, a
subdiagonal matrix with nonzero elements on the main
diagonal has an inverse matrix over a field of
characteristic zero, having also the form of subdiagonal
matrix. Similarly, an inverse matrix towards
symmetrical or skew-symmetric matrix is also
symmetric or skew-symmetric accordingly. Also, the
matrix inverse to non-degenerate (nonsingular)
circulant will be a circulant itself, and finally, the
matrix inverse to nonsingular quasdiagonal matrix D
will be quasdiagonal itself, and will have the same
partitioned structure as D. Thus, there is a problem of
determining these types of nonsingular matrices that
have an inverse matrix of the same type as a given
matrix. In line with this problem in the present study it
is determined such type of matrices for which an
inverse matrix has the same type, at that the conditions
are identified in explicit form, ensuring the
nonsingularity of the matrix. The matrices of three
orders are shown in detail. These results allow
determining the characteristics of fields over which
there are inverse matrices of the considered types

The аrticle is devoted to study of adsorption of enzymes, antioxidants contained in horseradish root on starch to create enterosorbent with anti-oxidant properties. For this goal we have studied adsorption isotherm calculated constants, thermodynamic parameters (change of enthalpy, entropy, and isobaric-isothermal potential); sorption kinetics of enzyme-antioxidants on starch and calculate the main characteristics. The method of producing of enterosorbent - antioxidant on based starches has been developed based on the experimental data. The ready sorbent is a white powder having no taste and smell. In biological fluids and water, it is insoluble. The enterosorbent on starch does not dissolve in water and biological fluids. It is the solid component. This enterosorbent can be used to protect the gastrointestinal tract of humans and animals against a wide variety of oxidants and peroxide. The results of this work will form the basis for the study of the antioxidant properties of the resulting enterosorbent. The results showed that during the tests, the enterosorbent on the starch showed good antioxidant properties. It has high antioxidant activity with respect to hydrogen peroxide

The article presents the data on vitality and age
structure of Beckmannia syzigachne and
Calamagrostis langsdorffii соеnopopulations under
conditions of the Lena-Viluy interfluve. The study
revealed 3 types of vitality of Beckmannia syzigachne
(prosperous, equilibrium, and depressive), 2 types of
vitality of Calamagrostis langsdorffii (prosperous and
depressive). The age spectrum in both species is
normal, non-complete, left-sided. According to the
delta-omega classification, the coenopopulations are
considered to be young

The article gives an analysis of the elemental
composition in raw materials of stevia. Stevia plant is
able to regulate the flow of heavy metals, allowing
them, on the one hand, actively oppose the excessive
intake of toxic elements and on the other hand,
selectively cumulate essential elements. The contents
of essential elements in plant raw materials do not
exceed the acceptable standards regardless of the
growing conditions

The author describes the dynamics of commercial
catches and the forecasts of pikeperch catch in 2010-
2016 with an analysis of the causes that affect the
state of stocks. The analysis of the effectiveness of
the recommended pikeperch catch has been made
taking into account the factors that affected the
fishery. Researches were carried out to study the
population structure, seasonal distribution, migrations
and other characteristics of the pikeperch populations
in the Azov limans. The obtained data made it
possible to assess the state of the pikeperch stocks
and give recommendations on their rational use.
Based on the results of ichthyological studies, the
pikeperch age, length and weight composition have
been determined and its biological state has been
studied. The preliminary forecast of the stocks and
the recommended pikeperch catch in the Azov limans
for 2018 is given. The forecast of the recommended
pikeperch catch in the Azov limans for 2018 is based
on the analysis of the stocks of commercial fish
species for a number of years of observations, taking
into account the total mortality rate under the
influence of the fishery load (commercial mortality
coefficient) and the amount of replenishment of
commercial population with fish mature for the first
time

The article gives the results of the study of an effect of
mechanochemical powder of wood green of Abies
(MPA) on potato morphogenesis in vitro. The study
involved the hormone-free nutrient mediums (MS, ½
B5, ½ LS) for growing microcuttings from preliminary
obtained aseptic plants. Plant morphogenesis was
observed on the 15th and 30th days. At that, the number
of developed shoots, plant height, leaves number,
rhizogenesis rates, root number and length were
estimated. MPA appeared to have the regulatory effect
on morphogenesis of potato microcuttings. Based on mineral composition of the nutrient agar medium for
potato microcuttings growing, MPA at 100 mg/l
concentration induced root development (½ B5
medium), reduced height of shoots (MS medium),
while the number of leaf blades was not affected

The study concerns the results of the study of
coenopopulations of the following Fabaceae species:
Medicago falcata, Oxytropis candicans, and
Onobrychis arenaria under conditions of the Middle
Lena River. The study was conducted in Yakutsk
vicinities, 13 km north-east of the city. It is stated that
all the studied coenopopulations are normal. Rather
small values of substitution and recovery indices
evidence certain problems in self-maintaining
processes. The age structure analysis using two age
indices, “delta” and “omega”, allows to classify the
coenopopulations of Medicago falcata, Oxytropis
candicans and Onobrychis arenaria in phytocoenoses
of the Lena River valley as normal young populations.
They were prevailed by juvenile, immature, virginile,
and young reproductive plants

We have presented information about species diversity
of the coastal zoobenthos in some of Karasun lakes,
Krasnodar. We have shown methodology information
and reported the research area. We have made a
taxonomic analysis. The biomass and the quantity of
the main zoobenthos groups were calculated. Based on
the two main fodder objects - Olygochaeta and
Chironomidae and the P/B coefficient, there was
calculated zoobenthos production of the studied lakes.
The potential fish capacity was defined

There are three main growth points of modern information technologies: global network and mobile communication, advanced human-machine interfaces, intelligent technologies. As it is known, the system (synergistic) effect is usually observed in multidisciplinary and interdisciplinary researches. This means that an interesting direction of research and development is located at the overlap of these three promising areas, namely: advanced interfaces in the global mobile networks, advanced intelligent interfaces and the application of artificial intelligence technologies in the Internet and mobile communications. In addition, a particularly high relevance goes to the development and application prospective of intelligent interfaces to the Internet and mobile communications. The Internet intellectualities gradually, it turns from non-local storage of large data (big data) in information space that contains meaningful big data, i.e. "great information" (great info), and then in the space of knowledge or "cognitive space" in which most information is actively used to achieve goals (management) and turns into the "great knowledge" (great knowledge). There are more sites devoted to artificial intelligence, free databases for machine learning (UCI, Kaggle, and others) and even on-line intelligent applications, and interfaces used in the Internet are improving. Recently, there was an acquisition of company Oculus, which is the world's leading developer and manufacturer of ammunition of virtual reality by the developer of one of the first global social networking Facebook - Mark Zuckerberg. However, students and scientists still do not notice that open, scalable, interactive, intelligent on-line environment for learning and researches already exists and operates, based on automated system-cognitive analysis (ASC-analysis) and its programmatic Toolkit – intellectual "Eidos" and the author's website. This article is an original presentation and it is designed to familiarize potential users with the capabilities of this environment