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Lp, Nazarenko; Саженова, Е. А.; Sa, Nazarenko; Es, Banshchikova

doi:10.1023/a:1024478415121

Cited by 2 publications

(2 citation statements)

References 10 publications

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“…2 in the indicated limits 0 < ℎ ≤ ≤ 10 10 m −1 . For this purpose, let us apply the correlation analysis [35,38]. Doing in such a way and applying the least squares method in the interval 10 −5 m −1 ≤ ℎ ≤ 10 10 m −1 , we obtain the regression equation lg( (ℎ )) = lg(ℎ ) + .…”

Section: Self-similar Fragmentation Modementioning

confidence: 99%

Self-Similar Mode of Metals Fragmentation under Severe Plastic Deformation

Хоменко¹

2019

Ukr. J. Phys.

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In the framework of nonequilibrium evolution thermodynamics, the influence of additive fluctuations on the kinetics of structural defects under severe plastic deformation has been studied. The applied method is a new one for the description of fragmentation modes and corresponding self-organization processes. It is found that a fragmented metallic specimen demonstrates a self-similar behavior, which results in the formation of a grain structure with various grain sizes. Such a behavior takes place provided that the probability distribution for the grain boundary density has a power-law dependence. A comparison of the results obtained in the Itˆo and Stratonovich forms demonstrates the absence of qualitative changes in the behavior of the system.

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Section: Self-similar Fragmentation Modementioning

confidence: 99%

Self-Similar Mode of Metals Fragmentation under Severe Plastic Deformation

Хоменко¹

2019

Ukr. J. Phys.

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“…Starting solutions of PhF and SF C = 1×10 -3 mol/L were prepared on the day of the experiment by dissolving the sample in 25 ml of twice-distilled water with addition of several drops of concentrated NaOH solution. Initial alcoholic solutions of o-NPhF, DSPhF and NF were prepared according to recommendations [12]: 1 ml HCl (6 mol/L) and 80-85 ml of 96% ethanol were added to the sample of dye and carefully heated until …”

mentioning

confidence: 99%

Вплив Замісників Та Характеру Середовища На Аналітичні Властивості Асоціатів Ксантенових Барвників З Полігексаметиленгуанідиній Хлоридом

Chmilenko

Ivanitsa

Chmilenko

2014

Вісн. Дніпропетр. ун-ту. Сер. Хім.

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The interaction of 5 anionic xanthene dyes -9-R-2,3,7-trihydroxy-6-fluorones (ТОF) with cationic polyelectrolyte (PE) -polyhexamethyleneguanidine chloride (PHMG) has been studied by the optical spectroscopy in a concentration range where PHMG has a polyelectrolyte effect. Hammet σ-constants were calculated. The correlations between structure of ТОF and shift of protolytic equilibrium in aqueous-polyelectrolyte solutions were established. Influence of рН, concentration of the ethanol, components ratio in the system PHMG-TOF on the character of the interaction of cationic PE with ТОF and value of the analytical signal were studied based on absorption spectra. The results were compared to those obtained in water solutions.Keywords: trioxyfluorone; spectrophotometry; polyhexamethyleneguanidine chloride; polyelectrolyte; ionisation constant; aggregation.Introduction. The application of dyes is frequently connected with the definition of PE [1][2][3][4][5][6][7]. 9-R-2,3,7-Triohydroxy-6-fluorones are the most widely studied and used. The degree of PE influence on ionic equilibriums in the dye solutions depends on numerous factors involved in the process of PE-dye interaction. The effect is caused by capability of PE to change property of the substances in solubilized condition that is connected with the change of medium properties in a microenvironment [8; 9]. The solubilized substance passes from aqueous to aqueous-polyelectrolyte microphase. Thus the competitive interactions between polymeric molecules and dye, solvent and components of the system are possible. The number of trapped ions of dye depends on the number and conformation of PE molecules in the solution [10; 13]. The formation of assosiates «PE-dye» is possible by means of a hydrogen bridging, electrostatic and hydrophobic interactions and depends on the concentration ratio of the components. The change of chemical-analytical properties of dyes in the presence of PE was described earlier: phenylfluorone with a nonionic PE poly(vinylpirrolidone) [11], bromphenol red and chlorphenol red with PHMG [8; 9]. The purpose of the present work is to study the optical, protolytic properties, as well as specifics of associate formation between ТОF with various substituents in 9 position of xanthene core and cationic PE -PHMG (М r ≈1,0×10 4 and 6,4×10 3 ) in aqueous and aqueous-alcoholic solutions. Experimental Materials and methods. Structural formulae of ТОF ( fig. 1) are shown in a table 1. Starting solutions of PhF and SF C = 1×10 -3 mol/L were prepared on the day of the experiment by dissolving the sample in 25 ml of twice-distilled water with addition of several drops of concentrated NaOH solution. Initial alcoholic solutions of o-NPhF, DSPhF and NF were prepared according to recommendations [12]: 1 ml HCl (6 mol/L) and 80-85 ml of 96% ethanol were added to the sample of dye and carefully heated until

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Cited by 2 publications

References 10 publications

Self-Similar Mode of Metals Fragmentation under Severe Plastic Deformation

Self-Similar Mode of Metals Fragmentation under Severe Plastic Deformation

Вплив Замісників Та Характеру Середовища На Аналітичні Властивості Асоціатів Ксантенових Барвників З Полігексаметиленгуанідиній Хлоридом

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