Perspectives of application of nanotubes in modern composite building materials

There are described the perspectives of application a carbon and hydro silicate nanotubes in modern compositional materials. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/2063

Identification of the effectiveness of associative rhizobacteria in spring wheat cultivation

Received: January 31st, 2021 ; Accepted: October 5th, 2021 ; Published: October 19th, 2021 ; Correspondence: [email protected] maximum increase in wheat yield (by 67% to the control), associated with a decrease in the root rot development by 19%, an increase in the productive bushiness by 18%, the spike weight by 26%, in the grains number per spike by 8% was noted when using the Bacillus subtilis strain 124-11; the strain effect on leaf diseases was insignificant (2–5%). The plants differed in the maximum changes (to control) in the total bushiness by 59%, the plants vegetative part weight by 27%, the flag leaf area by 21%, the pre-flag leaf area by 28%, the roots numbers and weight by 20% and 62%. After plants treatments with the Pseudomonas fluorescens strain SPB2137, the wheat maturation period was reduced by 9% (to the control), wheat yield increased by 58% due to a decrease in the development of root rot and septoria by 18%, the yellow rust pustules area by 44%; the productive bushiness and plant height increased by 25% and 19%, the plant vegetative weight by 21%, the spike length by 4%. The most expressed protective and growth-stimulating effect was shown by the Sphingomonas sp. K1B, which caused a maximum decrease (to the control) in the root rot and yellow rust development by 22% and 7%, the strips length by 22%, the pustules number in the strip by 29%, brown rust by 10%, septoria by 11%. Wheat plants were characterized by a large number and length of roots by 17% and 13%, root weight by 49%, a maximum increase in the nodal roots number and length by 15% and 17%; total bushiness by 34.5%; a maximum increase in plant vegetative weight by 37%; the spike length by 3%

Effect of Bias Fields on off-Diagonal Magnetoimpedance (MI) Sensor Performance

This paper investigates the performance of off-diagonal magnetoimpedance in Co-based amorphous wire subjected to dc bias fields: circular and orthogonal (with respect to the wire axis). Typically it is as-sumed that the wire impedance is insensitive to the orthogonal field so the wire element can be used to construct 3D sensors. Our results demonstrated the possibility of large impedance change due to this field, in the range of 10 mV/Oe. The dc current in a wire generating a circular field results in improved sensitivi-ty due to elimination of the domain structure and smoothing the effect of the anisotropy deviations. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/3633

On the Complexity of Computing Two Nonlinearity Measures

We study the computational complexity of two Boolean nonlinearity measures: the nonlinearity and the multiplicative complexity. We show that if one-way functions exist, no algorithm can compute the multiplicative complexity in time $2^{O(n)}$ given the truth table of length $2^n$, in fact under the same assumption it is impossible to approximate the multiplicative complexity within a factor of $(2-\epsilon)^{n/2}$. When given a circuit, the problem of determining the multiplicative complexity is in the second level of the polynomial hierarchy. For nonlinearity, we show that it is #P hard to compute given a function represented by a circuit

New Electron Conversion Lines from Existing ?-Transitions In 160dy

Three photo plates derived with spectrograph LNP JINR with constant magnetic field [1] have been investigated using the Microscope Automatic Scanning MAS [2]. Electron internal conversion (ICE) spectrograms of two erbium (Er P-2, Er P-8) and one Ho fractions has been measured. More detailed analysis gave us the possibility to obtain some new lines (see table) in addition to many earlier existing lines in 160Dy [3]. For that investigations it is necessary to increase the speed with which microscopic objects are measured are described. These efforts include the modernization of the MAS automatic scanning microscope and the development of programs to reach an initial point and for carrying out automatic point-to-point linear transitions with a specified step. The error in realizing a transition to a given point with specified coordinates is shown to amount to 1 µm

Influence of the High-Temperature Annealing on the Structure and Mechanical Properties of Vacuum–Arc Coatings from Mo/(Ti + 6 wt % Si)N

Scanning electron microscopy with energy dispersive element microanalysis, X-ray structural analysis, and microindentation were used to study the effect of the deposition conditions in a reactive nitrogen atmosphere on the growth morphology, phase composition, structure, and microhardness of vacuum–arc multilayer coatings produced by the evaporation of cathodes from Mo and (Ti + 6 wt % Si) both after their deposition and after high?temperature annealing. It has been established that the use of the composite cathode of Ti and Si allows the formation of the structure state inclined to ordering to form a two-phase compound from TiN and Ti5Si3 at high-temperature annealing. In this case the coating hard? ness increases to a value higher than 45 GPa

Efficiency of karoflavin use in hepatoses of broilers

Relevance: In recent years, the negative role of some pharmaceuticals effect on the liver of an agricultural bird which hepatotoxicity sharply increases in theprocess of biotransformation in the connection with the formation of active metabolites was revealed. Poisoning with xenobiotics and hormone and protein metabolites accumulating in an organism causes intoxication and promotes increase in intensity of peroxide lipid oxidation. Therefore, biooxidantsuse which include fat- and water-soluble vitamins is necessary. Considering this, together with the staff of CJSC Petrokhim we developed a new complex drug which contained carotene, bioflavonoid complex of a larch, and fat-soluble vitamins. The drug was called Karoflavin.The purpose of the work was to study the possible use of karoflavin inbroilers with hepatosis.Results of the study: The obtained resultsshowed highgrowth stimulating activity and biological availability of karoflavin, and its hepatoprotective properties. After karoflavin use bird average daily body-weight increased by 9.5 and 10.3%, while forage use decreased by 1.1 and 1.6%, calcium serum blood level increased by 35.0 and 35.9%, vitamin A increased by 20.3 and 25.6%, aspartateaminotransferase activity decreased by 20.3 and 21ю1%, alanineaminotransferases - by 20.3 and 22.9%, glucose level decreased by 26.1 and 25.6%.Conclusions: Karoflavin is proposed to enter into diets of broilers for the prevention of hepatoses at the rate of 1.0 g/kg of body weight during the whole period of broiler growing.Keywords: Karoflavin, carotene, vitamins, bioflavonoidny complex of a larch, broilers, diets, hepatose

Tight-binding study of interface states in semiconductor heterojunctions

Localized interface states in abrupt semiconductor heterojunctions are studied within a tight-binding model. The intention is to provide a microscopic foundation for the results of similar studies which were based upon the two-band model within the envelope function approximation. In a two-dimensional description, the tight-binding Hamiltonian is constructed such that the Dirac-like bulk spectrum of the two-band model is recovered in the continuum limit. Localized states in heterojunctions are shown to occur under conditions equivalent to those of the two-band model. In particular, shallow interface states are identified in non-inverted junctions with intersecting bulk dispersion curves. As a specific example, the GaSb-AlSb heterojunction is considered. The matching conditions of the envelope function approximation are analyzed within the tight-binding description.Comment: RevTeX, 11 pages, 3 figures, to appear in Phys. Rev.

Structural engineering of NbN/Cu multilayer coatings by changing the thickness of the layers and the magnitude of the bias potential during deposition

To determine the patterns of structural engineering of vacuum-arc coatings based on niobium nitride in the NbN/Cu multilayer composition, the effect of layer thickness and bias potential on the structural-phase state and physico-mechanical characteristics of vacuum-arc coatings was studied. It was found that the metastable δ-NbN phase (cubic crystal lattice, structural type NaCl) is formed in thin layers (about 8 nm thick) regardless of Ub. With a greater thickness of the layers of niobium nitride (in the multilayer NbN/Cu composition), the phase composition changes from metastable δ-NbN to the equilibrium ε-NbN phase with a hexagonal crystal lattice. An increase in the bias potential during deposition from -50 to -200 V mainly affects the change in the preferential orientation of crystallite growth. The highest hardness (28.2 GРa) and adhesive resistance is achieved in coatings obtained at Ub = -200 V with the smallest ayer thickness. The highest hardness corresponds to the structurally deformed state in which the crystallite texture is formed with the [100] axis perpendicular to the growth surface, as well as a large microstrain (1.5%) in crystallites.Для визначення закономірностей структурної інженерії вакуумно-дугових покриттів на основі нітриду ніобію в багатошарової композиції NbN/Cu досліджено впливи товщини шарів і потенціалу зсуву на структурно-фазовий стан і фізико-механічні характеристики вакуумно-дугових покриттів. Встановлено, що в тонких шарах (товщиною близько 8 нм) незалежно від Ub відбувається формування метастабільної δ-NbN-фази (кубічна кристалічна решітка, структурний тип NaCl). При більшій товщині шарів нітриду ніобію (у багатошаровій композиції NbN/Cu) відбувається зміна фазового складу від метастабільної δ-NbN-фази до рівноважної ε-NbN-фази з гексагональною кристалічною решіткою. Збільшення потенціалу зсуву при осадженні від -50 до -200 В в основному впливає на зміну переважної орієнтації зростання кристалітів. Найбільша твердість (28,2 ГПа) і адгезійна стійкость досягаються в покриттях, отриманих при Ub = -200 В i найменшій товщині шарів. Найбільшій твердості відповідає структурно-деформований стан, при якому формується текстура кристалітів з віссю [100], перепендикулярною поверхні зростання, а також велика мікродеформація (1,5%) у кристалітах.Для определения закономерностей структурной инженерии вакуумно-дуговых покрытий на основе нитрида ниобия в многослойной композиции NbN/Cu изучены влияния толщины слоев и потенциала смещения на структурно-фазовое состояние и физико-механические характеристики вакуумно-дуговых покрытий. Установлено, что в тонких слоях (толщиной около 8 нм) вне зависимости от Ub происходит формирование метастабильной δ-NbN-фазы (кубическая кристаллическая решетка, структурный тип NaCl). При большей толщине слоев нитрида ниобия (в многослойной композиции NbN/Cu) происходит изменение фазового состава от метастабильной δ-NbN-фазы до равновесной ε-NbN-фазы с гексагональной кристаллической решеткой. Увеличение потенциала смещения при осаждении от -50 до -200 В в основном влияет на изменение преимущественной ориентации роста кристаллитов. Наибольшая твердость (28,2 ГПа) и адгезионная стойкость достигаются в покрытиях, полученных при Ub = -200 В и наименьшей толщине слоев. Наибольшей твердости соответствует структурно-деформированное состояние, при котором формируется текстура кристаллитов с осью [100], перепендикулярной поверхности роста, а также большая микродеформация (1,5%) в кристаллитах