40 research outputs found

    ΠœΠΎΠ΄ΠΈΡ„ΠΈΠΊΠ°Ρ†ΠΈΡ пСроксинитритом ΠΊΠ°ΠΊ способ ΡƒΠ»ΡƒΡ‡ΡˆΠ΅Π½ΠΈΡ цитосовмСстимости Π³ΠΈΠ΄Ρ€ΠΎΠ³Π΅Π»Π΅ΠΉ Π½Π° основС Π°Π»ΡŒΠ³ΠΈΠ½Π°Ρ‚Π° натрия

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    Sodium alginate is one of the most frequently used materials in biomedicine. However, alginate-based scaffolds have extremely low adhesive properties and have to be improved. The authors have proposed combined hydrogels of gelatin and sodium alginate which have been modified by peroxynitrite in heterophasic conditions using ethanol. It has been determined that thus modified sodium alginate contains an increased level of carbonyl, carboxyl and nitro groups. Authors have developed chemically and chemical-enzymatically cross-linked hydrogels with better adhesive properties and absence of cytotoxicity. Moreover, sodium alginate modification has a positive impact on cell morphology in comparison with control group of non-adhesive alginate-gelatin hydrogels. It allows the further improvement and application of the biomaterial which have been developed by the authors for bioengineering scaffold production and 3D culturing.ΠΠ»ΡŒΠ³ΠΈΠ½Π°Ρ‚ натрия – ΠΎΠ΄ΠΈΠ½ ΠΈΠ· часто примСняСмых Π² Π±ΠΈΠΎΠΌΠ΅Π΄ΠΈΡ†ΠΈΠ½Π΅ ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»ΠΎΠ². Однако скаффолды ΠΈ Π³ΠΈΠ΄Ρ€ΠΎΠ³Π΅Π»ΠΈ Π½Π° Π΅Π³ΠΎ основС ΠΎΠ±Π»Π°Π΄Π°ΡŽΡ‚ ΠΊΡ€Π°ΠΉΠ½Π΅ слабыми Π°Π΄Π³Π΅Π·ΠΈΠ²Π½Ρ‹ΠΌΠΈ свойствами ΠΈ Π½ΡƒΠΆΠ΄Π°ΡŽΡ‚ΡΡ Π² ΡΠΎΠ²Π΅Ρ€ΡˆΠ΅Π½ΡΡ‚Π²ΠΎΠ²Π°Π½ΠΈΠΈ. Нами ΠΏΡ€Π΅Π΄Π»ΠΎΠΆΠ΅Π½Ρ‹ ΠΊΠΎΠΌΠ±ΠΈΠ½ΠΈΡ€ΠΎΠ²Π°Π½Π½Ρ‹Π΅ Π³ΠΈΠ΄Ρ€ΠΎΠ³Π΅Π»ΠΈ Π½Π° основС ΠΆΠ΅Π»Π°Ρ‚ΠΈΠ½Π° ΠΈ Π°Π»ΡŒΠ³ΠΈΠ½Π°Ρ‚Π° натрия, ΠΌΠΎΠ΄ΠΈΡ„ΠΈΡ†ΠΈΡ€ΠΎΠ²Π°Π½Π½ΠΎΠ³ΠΎ пСроксинитритом Π² Π³Π΅Ρ‚Π΅Ρ€ΠΎΡ„Π°Π·Π½Ρ‹Ρ… условиях Π² срСдС этилового спирта. ΠœΠΎΠ΄ΠΈΡ„ΠΈΡ†ΠΈΡ€ΠΎΠ²Π°Π½Π½Ρ‹ΠΉ Ρ‚Π°ΠΊΠΈΠΌ ΠΎΠ±Ρ€Π°Π·ΠΎΠΌ Π°Π»ΡŒΠ³ΠΈΠ½Π°Ρ‚ натрия ΠΎΠ±Π»Π°Π΄Π°Π΅Ρ‚ ΡƒΠ²Π΅Π»ΠΈΡ‡Π΅Π½Π½Ρ‹ΠΌ содСрТаниСм ΠΊΠ°Ρ€Π±ΠΎΠ½ΠΈΠ»ΡŒΠ½Ρ‹Ρ…, ΠΊΠ°Ρ€Π±ΠΎΠΊΡΠΈΠ»ΡŒΠ½Ρ‹Ρ… ΠΈ Π½ΠΈΡ‚Ρ€ΠΎΠ³Ρ€ΡƒΠΏΠΏ. Π Π°Π·Ρ€Π°Π±ΠΎΡ‚Π°Π½Π½Ρ‹Π΅ Π°Π²Ρ‚ΠΎΡ€Π°ΠΌΠΈ ΠΈΠΎΠ½Π½ΠΎ ΠΈ ΠΈΠΎΠ½Π½ΠΎ-Ρ„Π΅Ρ€ΠΌΠ΅Π½Ρ‚Π°Ρ‚ΠΈΠ²Π½ΠΎ ΡΡˆΠΈΡ‚Ρ‹Π΅ Π³ΠΈΠ΄Ρ€ΠΎΠ³Π΅Π»ΠΈ ΠΎΠ±Π»Π°Π΄Π°ΡŽΡ‚ ΡƒΠ»ΡƒΡ‡ΡˆΠ΅Π½Π½Ρ‹ΠΌΠΈ Π°Π΄Π³Π΅Π·ΠΈΠ²Π½Ρ‹ΠΌΠΈ свойствами ΠΈ Π½Π΅ ΠΏΡ€ΠΎΡΠ²Π»ΡΡŽΡ‚ цитотоксичности. ΠšΡ€ΠΎΠΌΠ΅ Ρ‚ΠΎΠ³ΠΎ, модификация Π°Π»ΡŒΠ³ΠΈΠ½Π°Ρ‚Π° натрия ΠΎΠΊΠ°Π·Ρ‹Π²Π°Π΅Ρ‚ ΠΏΠΎΠ»ΠΎΠΆΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎΠ΅ влияниС Π½Π° ΠΌΠΎΡ€Ρ„ΠΎΠ»ΠΎΠ³ΠΈΡŽ ΠΊΠ»Π΅Ρ‚ΠΎΠΊ ΠΏΠΎ ΡΡ€Π°Π²Π½Π΅Π½ΠΈΡŽ с ΠΊΠΎΠ½Ρ‚Ρ€ΠΎΠ»ΡŒΠ½Ρ‹ΠΌΠΈ Π½Π΅Π°Π΄Π³Π΅Π·ΠΈΠ²Π½Ρ‹ΠΌΠΈ Π°Π»ΡŒΠ³ΠΈΠ½Π°Ρ‚-ΠΆΠ΅Π»Π°Ρ‚ΠΈΠ½ΠΎΠ²Ρ‹ΠΌΠΈ гидрогСлями. Π­Ρ‚ΠΎ Π΄Π΅Π»Π°Π΅Ρ‚ Π²ΠΎΠ·ΠΌΠΎΠΆΠ½Ρ‹ΠΌ дальнСйшСС ΡΠΎΠ²Π΅Ρ€ΡˆΠ΅Π½ΡΡ‚Π²ΠΎΠ²Π°Π½ΠΈΠ΅ ΠΈ использованиС Ρ€Π°Π·Ρ€Π°Π±ΠΎΡ‚Π°Π½Π½ΠΎΠ³ΠΎ Π±ΠΈΠΎΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»Π° для получСния Π±ΠΈΠΎΠΈΠ½ΠΆΠ΅Π½Π΅Ρ€Π½Ρ‹Ρ… скаффолдов ΠΈ 3D-ΠΊΡƒΠ»ΡŒΡ‚ΠΈΠ²ΠΈΡ€ΠΎΠ²Π°Π½ΠΈΡ

    Representability and Specht problem for G-graded algebras

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    Let W be an associative PI algebra over a field F of characteristic zero, graded by a finite group G. Let id_{G}(W) denote the T-ideal of G-graded identities of W. We prove: 1. {[G-graded PI equivalence]} There exists a field extension K of F and a finite dimensional Z/2ZxG-graded algebra A over K such that id_{G}(W)=id_{G}(A^{*}) where A^{*} is the Grassmann envelope of A. 2. {[G-graded Specht problem]} The T-ideal id_{G}(W) is finitely generated as a T-ideal. 3. {[G-graded PI-equivalence for affine algebras]} Let W be a G-graded affine algebra over F. Then there exists a field extension K of F and a finite dimensional algebra A over K such that id_{G}(W)=id_{G}(A).Comment: 37 page

    Zn\mathbf {Z}_n-graded polynomial identities of the full matrix algebra of order nn

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    Wall Materials on the Base of Burned Rocks

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    Показана Π²ΠΎΠ·ΠΌΠΎΠΆΠ½ΠΎΡΡ‚ΡŒ получСния эффСктивных Π±Π΅Π·ΠΎΠ±ΠΆΠΈΠ³ΠΎΠ²Ρ‹Ρ… стСновых ΡΡ‚Ρ€ΠΎΠΈΡ‚Π΅Π»ΡŒΠ½Ρ‹Ρ… ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»ΠΎΠ² Π½Π° основС Π³ΠΎΡ€Π΅Π»Ρ‹Ρ… ΠΏΠΎΡ€ΠΎΠ΄ мСстороТдСний ΠšΡ€Π°ΡΠ½ΠΎΡΡ€ΡΠΊΠΎΠ³ΠΎ края. ΠŸΡ€ΠΈΠ²Π΅Π΄Π΅Π½Ρ‹ Ρ€Π΅Π·ΡƒΠ»ΡŒΡ‚Π°Ρ‚Ρ‹ исслСдований основных эксплуатационных свойств Ρ€Π°Π·Ρ€Π°Π±ΠΎΡ‚Π°Π½Π½Ρ‹Ρ… ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»ΠΎΠ². РассмотрСны тСхнологичСскиС способы изготовлСния Π±Π΅Π·ΠΎΠ±ΠΆΠΈΠ³ΠΎΠ²Ρ‹Ρ… стСновых ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»ΠΎΠ² Π½Π° основС Π³ΠΎΡ€Π΅Π»Ρ‹Ρ… ΠΏΠΎΡ€ΠΎΠ΄. УстановлСно, Ρ‡Ρ‚ΠΎ издСлия Π½Π° основС Π³ΠΎΡ€Π΅Π»Ρ‹Ρ… ΠΏΠΎΡ€ΠΎΠ΄ сопоставимы ΠΏΠΎ прочности ΠΏΡ€ΠΈ сТатии с кСрамичСским ΠΊΠΈΡ€ΠΏΠΈΡ‡ΠΎΠΌ (Π“ΠžΠ‘Π’ 530-2012), Π½ΠΎ ΠΈΠΌΠ΅ΡŽΡ‚ Π·Π½Π°Ρ‡ΠΈΡ‚Π΅Π»ΡŒΠ½ΠΎ Π±ΠΎΠ»Π΅Π΅ Π²Ρ‹ΡΠΎΠΊΡƒΡŽ ΠΏΡ€ΠΎΡ‡Π½ΠΎΡΡ‚ΡŒ ΠΏΡ€ΠΈ ΠΈΠ·Π³ΠΈΠ±Π΅, Ρ‡Π΅ΠΌ Ρƒ кСрамичСского ΠΊΠΈΡ€ΠΏΠΈΡ‡Π° Π΄Π°Π½Π½ΠΎΠΉ ΠΌΠ°Ρ€ΠΊΠΈ. ΠžΡ‚Ρ€Π°ΠΆΠ΅Π½Ρ‹ вопросы прСодолСния нСоднородности состава ΠΈ строСния Π³ΠΎΡ€Π΅Π»Ρ‹Ρ… ΠΏΠΎΡ€ΠΎΠ΄ (Π³Π»ΠΈΠ΅ΠΆΠ΅ΠΉ). Π”Π°Π½ Π°Π½Π°Π»ΠΈΠ· свойств Π±Π΅Π·ΠΎΠ±ΠΆΠΈΠ³ΠΎΠ²Ρ‹Ρ… стСновых ΠΌΠ°Ρ‚Π΅Ρ€ΠΈΠ°Π»ΠΎΠ² Π² зависимости ΠΎΡ‚ ΠΌΠ΅Ρ‚ΠΎΠ΄ΠΎΠ² производстваThe possibility of obtaining effective wall building materials on the basis of burut rocks of the Krasnoyarsk Territory is shown. The results of studies of basic operational properties of the materials developed are given. The technological methods of making bezobzhigovyh wall materials on the basis of burnt rocks are considered it is found that the products on the basis of burnt rocks are comparable with compression strength of ceramic bricks (GOST 530-2012), but have a significantly higher flexural strength than the ceramic bricks of this mark. Issues of overcoming the heterogeneity of the composition and structure of burned rocks are reflected. The analysis of the properties of wall materials, depending on the production methods is presente
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