911 research outputs found
SUPPLEMENTARY INFORMATION: From Tetraalkylphosphonium Ionic Liquids to Phosphonium Ylides: How the Ionic Sizes Influence Carbon Dioxide Capture?
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SUPPLEMENTARY INFORMATION
From Tetraalkylphosphonium Ionic Liquids to Phosphonium Ylides: How the Ionic Sizes Influence Carbon Dioxide Capture?
Vitaly V. Chaban and Nadezhda A. Andreeva
(a) Yerevan State University, Yerevan, 0025, Armenia.
(b) Peter the Great St. Petersburg Polytechnic University, Saint Petersburg, Russian Federation.
Corresponding author: [email protected].</p
On antiplane deformations of an elastic material with rigid fibers considering surface energy and nonperfect contact
No full textWithin the linear Gurtin–Murdoch model of surface elasticity we consider the antiplane deformations in an elastic matrix with a rigid cylindrical fiber influenced by external force. The influence of the surface elastic moduli on the stress distribution and adhesion force is analyzed
Effect of Cavitation Bubble Collapse on the Modification of Solids: Crystallization Aspects
No full textThis review examines the concepts how cavitation bubble collapse affects crystalline structure, the crystallization of newly formed structures, and recrystallization. Although this subject can be discussed in a broad sense across the area of metastable crystallization, our main focus is discussing specific examples of the inorganic solids: metal, intermetallics, metal oxides, and silicon. First, the temperature up to which ultrasound heats solids is discussed. Cavitation-induced changes in the crystal size of intermetallic phases in binary AlNi (50 wt % of Ni) alloys allow an estimation of local temperatures on surfaces and in bulk material. The interplay between atomic solid-state diffusion and recrystallization during bubble collapses in heterogeneous systems is revealed. Furthermore, cavitation triggered red/ox processes at solid/liquid interfaces and their influence on recrystallization are discussed for copper aluminum nanocomposites, zinc, titanium, magnesium-based materials, and silicon. Cavitation-driven highly nonequilibrium conditions can affect the thermodynamics and kinetics of mesoscopic phase formation in heterogeneous systems and in many cases boost the macroscopic performance of composite materials, notably in catalytic alloy and photocatalytic semiconductor oxide properties, corrosion resistance, nanostructured surface biocompatibility, and optical properties.ope
Microbubbles trigger oscillation of crystal size in solids
No full textAn understanding of the nature and conditions of nonlinear processes in open systems is important for modulation of the microstructure of solids at a new level of complexity. We demonstrate that cavitation generated by high intensity ultrasound (HIUS) triggers nonlinear processes in microparticles and layers of titanium. We reveal a non-monotonic dependence of the size of grains in the treated solids on sonication time, and oscillation of titanium grain sizes vs. time of ultrasonic treatment, indicating the influence of two opposing forces: cavitation driven impact of shock heating and shear stress on surfaces. These nonlinear self-organization processes in solids promise new microstructured materials with applications among others in bio- and geosciences.ope
A semiotic analysis of the short stories of Leonid Andreyev, 1900-1909
Get PDFThis thesis applies the techniques of semiotic analysis to a selection of short stories by Leonid Andreyev in an attempt to offer one answer to the problems of categorising Andreyev's unique art and placing it within a literary-evolutionary perspective. The semiotic method was chosen because of its ability both to assimilate literary texts to the supra-individual processes with which it works, and at the same time to delineate an author's particular contribution to these processes. Drawing on a range of literary theory from early Russian Formalism onwards, the study proceeds from one level to another according to a principle of "degree of abstraction", so that each level constitutes firstly an independent account of Andreyev's texts in itself, and secondly one stage in an overall analysis. The analysis at each level pinpoints, in its own terms, a series of semiotic tensions or clashes as being at the heart of Andreyev's literary system. Conflict within his stories between the principles of poetry and prose, metaphor and metonymy, 'discourse' and 'story' and between codes of allegory and codes of reference are among the major tensions highlighted. These tensions are in turn used to account for the fantastic element in Andreyev's stories (tension and ambiguity being the key features of Fantastic literature as defined by many literary theoreticians).The unique, Andreyevan version of the Fantastic is viewed as an index of Andreyev's position in literary evolution at a point of transition between an older, authoritative, transitive mode of narration and a more recent, non-authoritative mode which has come to dominate much twentieth-century literature. The final reference-point for all these tensions is demonstrated to be a shift in modern culture as a whole towards a more impersonal. Mythic thought-system, a shift at the centre of which the art of Leonid Andreyev can be convincingly placed. The material drawn upon includes, in addition to the corpus of Andreyev stories specified, a wide range of works by Andreyev's contemporaries and also the hitherto unexploited draft-manuscripts to a number of Andreyev stories held in the Hoover Institution, U.S.A.A Glossary of the most commonly used theoretical terms is provided at the end of the study
Tolstoj protiv Andreeva: v iskrennosti otkazat’ (Tolstoj vs Andreev, o della sincerità negata)
No full textIn "Tolstoj protiv Andreeva: v iskrennosti otkazat’" (Tolstoj versus Andreev, o della sincerità negata), l'A.i ricostruisce il difficile rapporto umano e letterario intercorso tra il grande scrittore “realista” e il giovane scrittore “espressionista” Leonid Andreev. L’autrice mostra come le veementi accuse di “mancanza di sincerità” rivolte da Tolstoj ad Andreev vadano interpretate non solo alla luce della diversa poetica e della diversa concezione del mondo dei due autori, ma anche, e più significativamente, come il segno di una “rimozione” da parte di Tolstoj di quell’elemento oscuro, irrazionale, che Andreev aveva saputo esprimere in modo esplicito, mentre l’autore più anziano era quasi sempre riuscito ad occultare a se stesso e agli altri
Light-Induced Water Splitting Causes High-Amplitude Oscillation of pH-Sensitive Layer-by-Layer Assemblies on TiO2
No full textWe introduce a simple concept of a light induced pH change, followed by high amplitude manipulation of the mechanical properties of an adjacent polymer film. Irradiation of a titania surface is known to cause water splitting, and this can be used to reduce the environmental pH to pH 4. The mechanical modulus of an adjacent pH sensitive polymer film can thus be changed by more than an order of magnitude. The changes can be localized, maintained for hours and repeated without material destruction
FIGURE 9 in A new species of the genus Ceriodaphnia Dana, 1853 (Cladocera: Daphnidae) from Eastern Siberia (Russia) that combines morphological features of two species groups
No full textFIGURE 9. Ceriodaphnia nikolaii sp. nov. from an oxbow of the Lena River near city of Yakutsk, Republic of Sakha (Yakutia), Asian Russia. A, ephippial female, lateral view. B, C, E, F, adult parthenogenetic female, lateral view. D, juvenile female, lateral view. Scale bars: 1 mm for E, F; 0.1 mm for A, D, F.Published as part of Garibian, Petr G., Andreeva, Lena V. & Kotov, Alexey A., 2023, A new species of the genus Ceriodaphnia Dana, 1853 (Cladocera: Daphnidae) from Eastern Siberia (Russia) that combines morphological features of two species groups, pp. 247-270 in Zootaxa 5284 (2) on page 258, DOI: 10.11646/zootaxa.5284.2.2, http://zenodo.org/record/792331
FIGURE 7. Ceriodaphnia dubia s.l in A new species of the genus Ceriodaphnia Dana, 1853 (Cladocera: Daphnidae) from Eastern Siberia (Russia) that combines morphological features of two species groups
No full textFIGURE 7. Ceriodaphnia dubia s.l. adult male from an oxbow of the Don River near Stogovskoy village, Rostov Area, European Russia. A, lateral view. B, dorsal view. C, head, lateral view. Adult male from puddle, Mongun-Taiyginskyi District, Tuva Republic, Asia Russia. D, lateral view. E, head, lateral view. Scale bars 0.1 mm.Published as part of Garibian, Petr G., Andreeva, Lena V. & Kotov, Alexey A., 2023, A new species of the genus Ceriodaphnia Dana, 1853 (Cladocera: Daphnidae) from Eastern Siberia (Russia) that combines morphological features of two species groups, pp. 247-270 in Zootaxa 5284 (2) on page 256, DOI: 10.11646/zootaxa.5284.2.2, http://zenodo.org/record/792331
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