Морфологічні показники продихів і склад кутикулярних восків листків липи повстистої (Tilia tomentosa Moench) за умов освітлення та затінення

Objective – to determine the differences in the morphological parameters of stomata and the component composition of cuticular waxes of silver linden (Tilia tomentosa Moench) leaves under conditions of lighting and shading in the crown of a tree. Material and methods. The sun-adapted and shadeadapted fully developed leaves of silver linden were selected as the test objects in our study. The component composition of the cuticular waxes was investigated by gas chromatography method, and stomata size and quantity values were determined on the epidermal imprints of the abaxial side of leaves. Results. The adaptive changes in leaves of the alien invasive plant species silver linden were established under conditions of increasing light intensity and temperature and reducing air humidity. Conclusion. The leaf surface area, leaf weight per unit area, density of stomata, and the content of the long chain components of the cuticular waxes increase, the length and the width of stomata decrease under conditions of lighting.Мета – визначити відмінності у морфологічних показниках продихів і складі кутикулярних восків листків липи повстистої (Tilia tomentosa Moench) в умовах освітлення та затінення. Матеріал та методи. Для дослідження відбирали оптимально розвинуті непошкоджені листки липи повстистої. Склад поверхневих восків вивчали методом капілярної газової хроматографії. Кількість і розмір замикальних клітин продихів визначали на відбитках епідермісу на абаксіальному боці листків рослин. Результати. Встановлено адаптивні зміни в листках липи повстистої в умовах збільшення інтенсивності освітлення і температури та зниження вологості повітря. Висновок. За умов освітлення збільшується площа листкової пластинки, маса одиниці площі листків, щільність продихів та вміст довголанцюгових компонентів у складі кутикулярних восків, а довжина і ширина продихів зменшуються порівняно із затіненими листками

Features Of The Phase Transformations In Titanium-containing Zinc Aluminosilicate Glasses Doped With Cobalt Oxide

We demonstrated the efficiency of the Raman spectroscopy method in the study of the process of the formation of the amorphous zinc aluminotitanate (ZAT) phase during the phase decomposition of the titanium-containing zinc aluminosilicate glasses doped with cobalt oxide. The quantitative dependences of the variation of the intensity of the Raman bands characteristic for amorphous and crystalline phases on the temperature of the thermal treatment and the cobalt oxide concentration have been obtained. The speed of phase decomposition with the separation of the nanosize crystals of zinc aluminate spinel (gahnite) and ZAT phase increases at low-temperature thermal treatments with increasing cobalt oxide concentration. The addition of cobalt oxide increases the amount of the amorphous ZAT phase separated during phase decomposition and increases its thermal stability during high-temperature treatments. It has been shown that the Co2+ ions enter the zinc aluminate spinel (gahnite) crystals precipitated during phase decomposition. It has been supposed that the composition of the residual glass is close to that of the quartz glass and it contains a very small amount of titanium-oxygen tetrahedra. © 2013 Pleiades Publishing, Ltd.392113123Golubkov, V.V., Dymshits, O.S., Petrov, V.I., Shashkin, A.V., Tsenter, M., Zhilin, A.A., Kang, U., Small-Angle X-ray Scattering and Low-Frequency Raman Scattering Study of Liquid Phase Separation and Crystallization in Titania-Containing Glasses of the ZnO-Al2O3-SiO2 System (2005) J. Non-Cryst. Solids, 351, pp. 711-721. , 10.1016/j.jnoncrysol.2005.01.071 1:CAS:528:DC%2BD2MXivVyqtro%3DMalyarevich, A.M., Yumashev, K.V., (2008) Tverdotel'Nye i Prosvetlyayushchiesya Sredy, , Belarusian National Technical University Minsk (Solid-State and Bleachable Media)Galagan, B.I., Godovikova, E.A., Denker, B.I., Meil'Man, M.L., Osiko, V.V., Sverchkov, S.E., Efficient Bleachable Filter Based on Co2+: MgAl 2O4 Crystals for Q-Switching of λ = 1.54 μm Erbium Glass Lasers (1999) Quantum Electron., 29 (3), pp. 189-190. , 10.1070/QE1999v029n03ABEH001448 1:CAS:528:DyaK1MXjs1ygtb0%3DYumashev, K.V., Denisov, I.A., Posnov, N.N., Prokoshin, P.V., Mikhailov, V.P., Nonlinear Absorption Properties of Co2+: MgAl 2O4 Crystal (2000) Appl. Phys., 70 (2), pp. 179-184. , 10.1007/s003400050029 1:CAS:528:DC%2BD3cXhslSgsrk%3DBoiko, R., Okhrimchuk, A., Shestakov, A., Glass-Ceramics Co2+: Saturable Absorber Q-Switch for 1.3-1.6 μm Spectral Region (1998) OSA Trends Opt. Photonics Ser., 19, pp. 185-188. , 1:CAS:528:DC%2BD3cXjsV2ntLw%3DDymshits, O., Shashkin, A., Zhilin, A., Volk, Y., Malyarevich, A., Yumashev, K., Formation and Passive Q-Switch Performance of Glass-Ceramics Containing Co2+-Doped Spinel Nanocrystals (2008) Adv. Mater. Res., 219, pp. 39-40Alekseeva, I., Baranov, A., Dymshits, O., Ermakov, V., Golubkov, V., Tsenter, M., Zhilin, A., Influence of CoO Addition on Phase Separation and Crystallization of Glasses of the ZnO-Al2O3-SiO2-TiO2 System (2011) J. Non-Cryst. Solids, 357, pp. 3928-3939. , 10.1016/j.jnoncrysol.2011.08.011 1:CAS:528:DC%2BC3MXhtF2ht7nLKang, U., Zhilin, A.A., Petrovsky, G.T., Dymshits, O.S., Chuvaeva, T.I., Structural Transformations of Nanometer Sized Crystals in CoO-Doped β-Eucryptite-Based Glass-Ceramics (1999) J. Non-Cryst. Solids, 258, pp. 216-222. , 10.1016/S0022-3093(99)00445-7 1:CAS:528:DyaK1MXns1arur0%3DFergusson, J., Wood, D.L., Van Utiert, L.G., Crystal-Field Spectra of d 3,7 Ions: V. Tetrahedral Co 2+ in ZnAl2O4 Spinel (1969) J. Chem. Phys., 51, pp. 2904-2910. , 10.1063/1.1672431Denisov, I.A., Volk, Y., Malyarevich, A.M., Yumashev, K., Dymshits, O.S., Zhilin, A.A., Kang, U., Lee, K.-H., Linear and Nonlinear Optical Properties of Cobalt-Doped Zinc Aluminum Glass-Ceramics (2003) J. Appl. Phys., 93 (7), pp. 3827-3831. , 10.1063/1.1555699 1:CAS:528:DC%2BD3sXitlens7g%3DGaleener, F.L., Leadbetter, A.J., Stringfellow, M.W., Comparison of the Neutron, Raman, and Infrared Vibrational Spectra of Vitreous SiO2, GeO2, and BeF2 (1983) Phys. Rev. B: Condens. Matter, 27 (2), pp. 1052-1078. , 10.1103/PhysRevB.27.1052 1:CAS:528:DyaL3sXpvVWntA%3D%3DBobovich, Y., Spectroscopic Investigation of the Coordination State of Titanium in Some Vitreous Solids (1963) Opt. Spektrosk., 14 (5), pp. 647-654Dymshits, O.S., Zhilin, A.A., Petrov, V.I., Tsenter, M., Chuvaeva, T.I., Golubkov, V.V., A Raman Spectroscopic Study of Phase Transformations in Titanium-Containing Lithium Aluminosilicate Glasses (1998) Glass Phys. Chem., 24 (2), pp. 79-98. , 1:CAS:528:DyaK1cXislyhsLk%3DBae, S.J., Kang, U., Dymshits, O., Shashkin, A., Tsenter, M., Zhilin, A., Raman Spectroscopy Study of Phase Transformations in Titania-Containing Lithium Aluminosilicate Glasses Doped with CoO (2005) J. Non-Cryst. Solids, 351, pp. 2969-2978. , 10.1016/j.jnoncrysol.2005.07.019 1:CAS:528:DC%2BD2MXhtVWgt7bPPorto, S.P.S., Fleury, P.A., Damen, T.C., Raman Spectra of TiO2, MgF2, ZnF2, FeF2, and MnF2 (1967) Phys. 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Wound healing potential of chitosan and N-sulfosuccinoyl chitosan derivatives

Comparative study of chitosan wound healing properties and its synthesized derivatives in MC-100 gel was carried out using the model of experimental full thickness skin wounds. It was determined that N-sulfosuccinoyl chitosan derivatives added into the gel in a concentration of 0. 05% possess the higher wound healing activity in comparison with other chitosan derivatives and decrease the half-healing period of wounds 2-3 times in comparison with the control. © 2010 Pleiades Publishing, Ltd

Wound healing potential of chitosan and N-sulfosuccinoyl chitosan derivatives

Comparative study of chitosan wound healing properties and its synthesized derivatives in MC-100 gel was carried out using the model of experimental full thickness skin wounds. It was determined that N-sulfosuccinoyl chitosan derivatives added into the gel in a concentration of 0. 05% possess the higher wound healing activity in comparison with other chitosan derivatives and decrease the half-healing period of wounds 2-3 times in comparison with the control. © 2010 Pleiades Publishing, Ltd