82 research outputs found
Π‘ΠΈΡΡΠ΅ΠΌΠ° Π°Π²ΡΠΎΠ½ΠΎΠΌΠ½ΠΎΠ³ΠΎ ΡΠ»Π΅ΠΊΡΡΠΎΡΠ½Π°Π±ΠΆΠ΅Π½ΠΈΡ Π½Π° ΠΎΡΠ½ΠΎΠ²Π΅ Π°ΠΊΡΠΈΠ°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΈΠ½Π΄ΡΠΊΡΠΎΡΠ½ΠΎΠ³ΠΎ Π³Π΅Π½Π΅ΡΠ°ΡΠΎΡΠ°
ΠΡΠΎΠ±Π΅Π½Π½ΠΎΡΡΠΈ ΡΠΊΠΎΠ»ΠΎΠ³ΠΈΡΠ΅ΡΠΊΠΈΡ ΡΡΠ΅Π±ΠΎΠ²Π°Π½ΠΈΠΉ ΠΊ ΠΏΡΠΎΠ΅ΠΊΡΠ°ΠΌ ΡΡΡΠΎΠΈΡΠ΅Π»ΡΡΡΠ²Π° Π·Π΄Π°Π½ΠΈΠΉ ΠΈ ΡΠΎΠΎΡΡΠΆΠ΅Π½ΠΈΠΉ
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Linear and nonlinear relations between DSC parameters and elastic moduli for chemically and thermally treated human hair
Against the practical context of thermal straightening, hair samples were obtained with a chemical (bleaching) as well as a cumulative thermal history (0β800Β s, 200Β Β°C). On these samples, tensile testing and DSC analysis, both in the wet state, were conducted to obtain the elastic moduli Ew as well as denaturation temperatures TD and enthalpies ΞHD. 3D plots show overall linearity for the relationships between the parameters for natural hair. For bleached hair, pronounced nonlinearities develop beyond 300Β s of thermal treatment. At this stage, TD as well as Ew approaches limiting values, consistent with the state of a highly cross-linked, thermoset polymer. 2D projections are used to investigate the correlations between pairs of parameters. The results show that bleaching imparts a specific sensitivity for thermal damage, namely, to the matrix proteins, which more readily than the intermediate filaments (IF) turn into a thermoset. Overall, correlations between parameters hold well prior to the thermoset range. It is thus suggested that tensile testing to determine the elastic modulus and DSC come to consistent and equivalent results, at least, for the current experimental context. However, while Ew combines contributions of IFs and matrix, DSC differentiates the specific property changes of these components. Β© 2019, The Author(s)
ΠΠΎΠΌΠΏΠ»Π΅ΠΊΡΠ½ΡΠΉ ΠΏΠΎΠ΄Ρ ΠΎΠ΄ ΠΊ Π²ΡΠ±ΠΎΡΡ ΡΠ΅Ρ Π½ΠΎΠ»ΠΎΠ³ΠΈΠΈ Π³ΠΈΠ΄ΡΠ°Π²Π»ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ°Π·ΡΡΠ²Π° ΠΏΠ»Π°ΡΡΠ° Π½Π° Π½Π΅ΡΡΡΠ½ΡΡ ΠΌΠ΅ΡΡΠΎΡΠΎΠΆΠ΄Π΅Π½ΠΈΡΡ
ΠΠ±ΡΠ΅ΠΊΡΠΎΠΌ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ ΡΠ²Π»ΡΠ΅ΡΡΡ ΡΠ°ΡΠΊΠ»ΠΈΠ½ΠΈΠ²Π°ΡΡΠΈΠ΅ ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»Ρ, ΠΏΡΠΈΠΌΠ΅Π½ΡΠ΅ΠΌΡΠ΅ ΠΏΡΠΈ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΠΈ Π³ΠΈΠ΄ΡΠ°Π²Π»ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠ°Π·ΡΡΠ²Π° ΠΏΠ»Π°ΡΡΠ°. Π¦Π΅Π»ΡΡ Π΄Π°Π½Π½ΠΎΠΉ Π²ΡΠΏΡΡΠΊΠ½ΠΎΠΉ ΠΊΠ²Π°Π»ΠΈΡΠΈΠΊΠ°ΡΠΈΠΎΠ½Π½ΠΎΠΉ ΡΠ°Π±ΠΎΡΡ ΡΠ²Π»ΡΠ΅ΡΡΡ ΠΈΠ·ΡΡΠ΅Π½ΠΈΠ΅ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΠΉ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΠΠ Π, Π²ΠΈΠ΄ΠΎΠ² ΡΠ°ΡΠΊΠ»ΠΈΠ½ΠΈΠ²Π°ΡΡΠΈΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² ΠΈ ΠΏΡΠΎΠΌΡΡΠ»ΠΎΠ²ΠΎΠ³ΠΎ ΠΎΠΏΡΡΠ° ΠΏΡΠΈΠΌΠ΅Π½Π΅Π½ΠΈΡ ΡΠ°ΡΠΊΠ»ΠΈΠ½ΠΈΠ²Π°ΡΡΠΈΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ². Π ΠΏΡΠΎΡΠ΅ΡΡΠ΅ ΠΈΡΡΠ»Π΅Π΄ΠΎΠ²Π°Π½ΠΈΡ Π±ΡΠ»ΠΈ ΡΠ°ΡΡΠΌΠΎΡΡΠ΅Π½Ρ Π½ΠΎΠ²ΡΠ΅ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΠΠ Π, Π²ΠΈΠ΄Ρ ΡΠ°ΡΠΊΠ»ΠΈΠ½ΠΈΠ²Π°ΡΡΠΈΡ
ΠΌΠ°ΡΠ΅ΡΠΈΠ°Π»ΠΎΠ² ΠΈ Π½ΠΎΠ²ΡΠ΅ ΡΠ°Π·ΡΠ°Π±ΠΎΡΠΊΠΈ Π² ΡΡΠΎΠΉ ΠΎΠ±Π»Π°ΡΡΠΈ. ΠΡΠΏΠΎΠ»Π½Π΅Π½ ΡΠ°ΡΡΠ΅Ρ Π½Π΅ΠΎΠ±Ρ
ΠΎΠ΄ΠΈΠΌΠΎΠ³ΠΎ ΠΊΠΎΠ»ΠΈΡΠ΅ΡΡΠ²Π° ΠΏΡΠΎΠΏΠΏΠ°Π½ΡΠΎΠ² Π΄Π»Ρ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΠΠ Π Π½Π° ΡΠΊΠ²Π°ΠΆΠΈΠ½Π΅ Π½ΠΎΠΌΠ΅Ρ 872 Π ΡΠ±Π°Π»ΡΠ½ΠΎΠ³ΠΎ ΠΌΠ΅ΡΡΠΎΡΠΎΠΆΠ΄Π΅Π½ΠΈΡ.The object of the study is propping materials used in hydraulic fracturing. The purpose of this final qualification work is to study hydraulic fracturing technologies, types of proppants and field experience in the use of proppants. In the course of the study, new hydraulic fracturing technologies, types of proppants and new developments in this area were considered. The calculation of the required amount of proppants for hydraulic fracturing was performed on well 872 of the Rybalnoye field
Ground water regimes containing country rock minerals in Southern Kuzbass (case study: Narysk-Ostashkin)
The paper describes the calculation results revealing groundwater in equilibrium to carbonates and aluminosilicate minerals of country rocks in Narysk-Ostashkinsk area. It was proved that groundwater is in nonequilibrium to primary (endogenous) minerals in which they dissolve, however are in equilibrium to clays and carbonates which precipitate in the groundwater. The groundwater composition varies
ΠΠ½Π°Π»ΠΈΠ· ΠΈ Π²ΡΠ±ΠΎΡ ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½ΠΎΠΉ ΡΠ΅Ρ Π½ΠΎΠ»ΠΎΠ³ΠΈΠΈ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΡΠ°Π±ΠΎΡ ΠΏΠΎ ΡΠ΅ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠΈ ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠ΅Ρ Π° Π»ΠΈΠ½Π΅ΠΉΠ½ΠΎ-ΠΏΡΠΎΠΈΠ·Π²ΠΎΠ΄ΡΡΠ²Π΅Π½Π½ΠΎΠ³ΠΎ ΡΠΏΡΠ°Π²Π»Π΅Π½ΠΈΡ ΠΌΠ°Π³ΠΈΡΡΡΠ°Π»ΡΠ½ΡΡ Π³Π°Π·ΠΎΠΏΡΠΎΠ²ΠΎΠ΄ΠΎΠ²
ΠΠ° ΠΎΡΠ½ΠΎΠ²Π΅ Π½ΠΎΡΠΌΠ°ΡΠΈΠ²Π½ΠΎ-ΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΎΠΉ Π΄ΠΎΠΊΡΠΌΠ΅Π½ΡΠ°ΡΠΈΠΈ Π²ΡΠ±ΡΠ°Π½Π° ΠΎΠΏΡΠΈΠΌΠ°Π»ΡΠ½Π°Ρ ΡΠ΅Ρ
Π½ΠΎΠ»ΠΎΠ³ΠΈΡ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΡΠ΅ΠΌΠΎΠ½ΡΠ½ΡΡ
ΡΠ°Π±ΠΎΡ Π½Π° ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΎΡΠ½ΠΎΠΌ ΡΠ΅Ρ
Π΅. Π Π°Π·ΡΠ°Π±ΠΎΡΠ°Π½Ρ ΡΠ΅ΠΊΠΎΠΌΠ΅Π½Π΄Π°ΡΠΈΠΈ ΠΏΠΎ ΠΏΡΠΎΠ²Π΅Π΄Π΅Π½ΠΈΡ ΡΠ΅ΠΌΠΎΠ½ΡΠ½ΡΡ
ΡΠ°Π±ΠΎΡ ΠΏΠΎ ΡΠ΅ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠΈ ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠ΅Ρ
Π°. Π Π°ΡΡΡΠΈΡΠ°Π½Ρ ΠΏΠΎΠΊΠ°Π·Π°ΡΠ΅Π»ΠΈ ΡΠ½Π΅ΡΠ³ΠΎΡΡΡΠ΅ΠΊΡΠΈΠ²Π½ΠΎΡΡΠΈ ΠΈ ΠΊΠΎΡΡΡΠΈΡΠΈΠ΅Π½ΡΡ ΡΠ΅Ρ
Π½ΠΈΡΠ΅ΡΠΊΠΎΠ³ΠΎ ΡΠΎΡΡΠΎΡΠ½ΠΈΡ Π³Π°Π·ΠΎΠΏΠ΅ΡΠ΅ΠΊΠ°ΡΠΈΠ²Π°ΡΡΠΈΡ
Π°Π³ΡΠ΅Π³Π°ΡΠΎΠ² Π΄ΠΎ ΠΈ ΠΏΠΎΡΠ»Π΅ ΡΠ΅ΠΊΠΎΠ½ΡΡΡΡΠΊΡΠΈΠΈ ΠΊΠΎΠΌΠΏΡΠ΅ΡΡΠΎΡΠ½ΠΎΠ³ΠΎ ΡΠ΅Ρ
Π°.On the basic of technical documentation the optimal technology of repair at the compressor department was chosen. Recommendations for the repair work on the reconstruction of the compressor department. The energy efficiency indicators and the technical state coefficients of gas compressor units before and after the reconstruction of the compressor department are calculated
ΠΠ½ΡΠΎΡΠΌΠ°ΡΠΈΠΎΠ½Π½Π°Ρ ΡΠΈΡΡΠ΅ΠΌΠ° ΡΡΠ΅ΡΠ° ΠΈ Π°Π½Π°Π»ΠΈΠ·Π° ΡΡΠ΅Π±Π½ΠΎΠΉ Π΄Π΅ΡΡΠ΅Π»ΡΠ½ΠΎΡΡΠΈ Π°Π²ΡΠΎΡΠΊΠΎΠ»Ρ "ΠΠ°Π³ΠΈΡΡΡΠ°Π»Ρ Π°Π²ΡΠΎ"
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