Structural and semantic features of impersonal sentences (on the example of the works of A.P. Chekhov)

The article describes the structural and semantic features of impersonal sentences on the example of the works of A.P. Chekhov. The reasons that determine the ability of the connective verb to impersonal use are investigated, a historical excursion on the impersonal use of various connective verbs is given

An inverse problem of finding the time-dependent diffusion coefficient from an integral condition

We consider the inverse problem of determining the time-dependent diffusivity in one-dimensional heat equation with periodic boundary conditions and nonlocal over-specified data. The problem is highly nonlinear and it serves as a mathematical model for the technological process of external guttering applied in cleaning admixtures from silicon chips. First, the well-posedness conditions for the existence, uniqueness, and continuous dependence upon the data of the classical solution of the problem are established. Then, the problem is discretized using the finite-difference method and recasts as a nonlinear least-squares minimization problem with a simple positivity lower bound on the unknown diffusivity. Numerically, this is effectively solved using the lsqnonlin routine from the MATLAB toolbox. In order to investigate the accuracy, stability, and robustness of the numerical method, results for a few test examples are presented and discussed

Indications of High-Generation Convergent Hybrids Based on Transgressive Recombination Prints in Cotton

In the article, it is presented that the use of complex and convergent hybridization is an effective method for increasing cotton weight per bag, 1000 seed weight, fiber yield and fiber length. Among the complex and convergent families based on the principle of transgressive recombination in increasing the cotton weight per bag, mainly O-401-03 and O-175-178 families, among the families based on complex hybridization in improving the weight of 1000 seeds, the O-401-03 family, convergent O-109 O-401-03, O-470-72, O-109-110, O-774-776, O-369-372 from the -110 families, as well as from the O-504-09 and O-609-610 families, improving fiber yield , O-504-09 and O-365-366 from families based on complex and convergent hybridization, relatively high values in families based on complex hybridization in terms of fiber length in families O-440-46 and O-289-90, among convergent hybrid families based on the principle of transgressive recombination The expediency of using O-609-610, O-393-94 and O-899-900 families in genetic-selection studies is highlighted

THE APPLICATION OF AMINO AND HYDROXYETHYL IMIDAZOLINES OF PETROLEUM ACIDS AS MULTIFUNCTIONAL ADDITIVES FOR DIESEL FUEL

In this research, the influence of amino- and hydroxyethyl imidazolines of petroleum acids on the antistatic property and lubricity of diesel fuel has been studied. The researches illustrated that when the boiling point of petroleum acid fractions increases, the influence of imidazolines on the antistatic property and lubricity of diesel fuel decreases. Besides, it has been known that, the influence of aminoethyl imidazolines of petroleum acids on the antistatic property and lubricity of diesel fuel is better than the influence of hydroxyethyl imidazolines, On the other hand, it has been revealed that, when imidazolines of petroleum acids are added to the diesel fuel, the antistatic effect increases over time

Processing of serpentenites of the Arvaten deposit of Uzbekistan with the use of ammonium sulphate

The article presents the results of a study of the processes of obtaining magnesium oxide by fusing serpentinites of the Arvaten deposit in the presence of ammonium sulfate, followed by grinding and treatment with water to separate silica from the suspension, neutralizing the filtrate with ammonia to pH 8.5 for precipitation and separation of impurity metal ions, precipitation and separation of ions magnesium from solution using ammonia and ammonium carbonate, thermal decomposition of magnesium corbanate to obtain magnesium oxide. It has been established that the use of ammonium sulfate for fusion of serpentite at a ratio of serpentenite: (NH4)2SO4 = 100: 201.77 and further processing of the resulting solutions allows you to obtain magnesium oxide with a composition (wt.%): MgO - 97.55; Fe2O3 - 0.86; A12O3 - 0.12; CaO - 0.18; SO3 - 0.48

Heredity and Variability of Early Maturity of Cotton Hybrids Developed By Participation of the Introgressive Progenies

In the article described the results of the analysis of the dominancy and variability of the main components of early maturing, i.e. the “germination-50% flowering” and the “germination-50% maturing” periods of F1-F4 hybrids developed by the participation of the introgressive cotton progenies. As result of investigations there are found out mainly negative heterosis, full dominance and intermediate inheritance, i.e. early maturing occur for the “germination 50% flowering” and “germination-50% maturing” periods at hybrids developed by the participation of introgressive cotton progenies. It was concluded possibility of using of them in the breeding of F1 hybrids with high heterosis. The cotton progenies PL-4684-86/16 of; PL-470/1/16; PL-58/16 and PL-588/16 and hybrid combinations PL-4679-81/16 x Jarkurgan; PL-58/16 x Jarkurgan; PL-200/16 x Jarkurgan; PL-4747-48/16 x Jarqurgan and PLBSG/16 x Jarqurgan developed through introgressive selection method were recommended to be widely used in studies on improvement of early maturity

F1-F 4 cotton hybrids obtained with introgressive cotton lines

The article presents cytogenetic analyzes of introgressive lines obtained by intergenome crossing and F1 - F4 cotton hybrids obtained with their participation. According to the obtained results, the presence of open bivalents and univalents in MKP in the crossed variants of F1 - F4 hybrid plants obtained from introgressive lines showed the absence of complete conjugation in the chromosomes due to the presence of structural differences between the homologous chromosomes in the crossed forms caused by the exchange of chromosomes with foreign chromosomes . According to the results of the tetrad analysis of the studied F 1 hybrids, the average was from 95.65 % (F1T-158/16 x Sultan) to 99.61% (F1T-4747-48/16 x Sultan), tetrads in F2 hybrid plants according to the results of the analysis, the meiotic index in 16 combinations ranged from 96.76 ± 0.34 to 99.54 ± 0.19 , and according to the results of the tetrad analysis in F 3 hybrid plants, the meiotic index in 16 combinations was 96.51 ± 0.56 to 99.34 ± 0.30 and according to the results of the analysis of tetrads in F4 hybrid plants, the meiotic index in 17 combinations was from 97.14 ± 0.29 to 98.92 ± 0.12, confirming the normal course of meiosis. (monod, dyad, triad, pentad, hexad and polyad) led to an increase in the number of This negatively affects the formation of normal gametes

Obtaining ammophosphate and sulfoammophosphate fertilizers on base of the washed dry concentrate containing 26% P2O5

The process of obtaining ammophosphate by means of phosphoric acid decomposition of washed dried concentrate (WDC with 26% P2O5 and 10% CO2) - raw material for the production of thermally fired concentrate, has been studied. The wet process phosphoric acid (WPA) contains (wt.%): 16.46 P2O5, 0.06 CaO, 1.11 MgO, 0.27 Fe2O3, 0.41 Al2O3, 2.98 SO3 and 0.99 F. The weight ratio of WPA:WDC ranged from 100: 10 to 100: 30. Then acidic phosphate pulps (at 65 °C) after 45 minutes were ammoniated to pH = 3.8, granulated and dried at 85-90 °C. It has been shown that the nitrogen content in the finished product ranges from 4.92-7.11%, total phosphorus (P2O5t.) 41.48-46.44%, phosphorus acceptable by citric acid (P2O5ac.c.a.) 34.79-45.11%, phosphorus form of water soluble (P2O5w.s.) 23.49-37.73%. Weight fractions of H2SO4 - 5 and 7.5 were optimal and the product contains 37.6 and 34.47% of P2O5t.; 24.11 and 22.06% CaOt., 88.75 and 92.40% P2O5ac.c.a.by citric acid: P2O5t., 84.21 and 89.7% P2O5ac.tr.b. by trilon B: P2O5t., 77.39 and 79.54% P2O5w.s.:P2O5t., 6.03 and 7.08% nitrogen, respectively. The strength of granules of fertilizers averages 3.50 MPa and are quite suitable for bulk storage and transportation

Utilization process research of the soap industry acid waste water with high carbonate phosphorite of central Kyzylkum

In the study, the process neutralization acid waster water from soapstock processing by high calcareous phosphorite of Central Kyzylkum at temperature 60 ºC by drainless technology was investigated. As a result, digested forms of P2O5 by citric acid and Trilon B in final products were ranged 30.28-50.43 and 25.58-39.93%, respectively. Those types of products can be used under autumn chill