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Julia Choina, Diana Dolat, Ewelina Kusiak, Magdalena Janus and Antoni Morawski

-3373(02)00269-2. Suda, Y., Kawasaki, H., Uea, T. & Ohshima, T. (2004). Preparation of high quality nitrogen doped TiO 2 thin film as a photocatalyst using a pulsed laser deposition method. Thin Solid Films. 453-454, 162-166. DOI: 10.1016/ j.tsf.2003.11.185. Tasbihi, M., Ngah C. R., Aziz, N., Mansor, A., Abdullah, A. Z., Teong, L. K. & Mohammed, A. R. (2007). Lifetime and Regeneration Studies of Various Supported TiO 2 Photocatalysts for the Degradation of Phenol under UV-C Light in a Batch Reactor. Ind. Eng. Chem. Res. 46(26), 9006-9014. DOI: 10

Open access

Melda Altikatoglu and Huriye Kuzu

Improvement of enzyme stability via non-covalent complex formation with dextran against temperature and storage lifetime

The optimal methodology to prepare the novel modified enzyme, polymer-enzyme complex, was developed to give a high catalytic activity in aqueous solution. The non-covalent complexes of two different enzymes (horseradish peroxidase and glucose oxidase) were prepared with various molar ratios (nD/nE 0,05; 0,1; 1; 5; 10; 15; 20) by using 75kDa dextran. The thermal stabilities of the obtained complexes were evaluated with the activities determined at different temperatures (25, 30, 35, 40, 50, 60, 70, 80°C) applying 60 minutes incubation time for pH 7. The complexes with the molar ratio nD/nHRP: 10 and nD/nGOD: 5 showed the highest thermal stability. Its activity was very high (ca. 1,5-fold higher activity than pure enzyme for HRP-dextran complexes) and almost the same between applying one hour incubation time and without incubation, and could also be measured at high temperatures (70, 80 °C). We finally succeeded in preparing dextran-enzyme complexes which showed higher activity than pure enzyme in aqueos solution at all temperatures for pH 7. In addition, the mentioned complexes at pH 7 had very long storage lifetime compared to purified enzyme at +4 °C; which is considered as a good feature for the usage in practice.

Open access

Jordan Hristov

. & Gwadera, M. (2012). On the application of an approximate kinetic equation of heat and mass transfer processes: the effect of body shape, Heat Mass Transfer , 48 (4), 599 -610. DOI: 10.1007/s00231-011-0905-6. 23. Rosner, D.E. (1969). Lifetime of a Highly Soluble Dense Spherical Particle1, The Journal of Physical Chemistry , 73 (2), 382-387. DOI: 10.1021/j100722a019. 24. Rice, R.G. & Do, D.D. (2006). Dissolution of a solid sphere in an unbounded, stagnant liquid, Chem. Eng. Sci ., 61 (2), 775-778. DOI: 10.1016/j.bbr.2011

Open access

Rafał Przekop and Leon Gradoń

Abstract

Deep bed filtration is an effective method of submicron and micron particle removal from the fluid stream. There is an extensive body of literature regarding particle deposition in filters, often using the classical continuum approach. However, the approach is not convenient for studying the influence of particle deposition on filter performance (filtration efficiency, pressure drop) when non-steady state boundary conditions have to be introduced. For the purposes of this work the lattice-Boltzmann model describes fluid dynamics, while the solid particle motion is modeled by the Brownian dynamics. For aggregates the effect of their structure on displacement is taken into account. The possibility of particles rebound from the surface of collector or reentrainment of deposits to fluid stream is calculated by energy balanced oscillatory model derived from adhesion theory. The results show the evolution of filtration efficiency and pressure drop of filters with different internal structure described by the size of pores. The size of resuspended aggregates and volume distribution of deposits in filter were also analyzed. The model enables prediction of dynamic filter behavior. It can be a very useful tool for designing filter structures which optimize maximum lifetime with the acceptable values of filtration efficiency and pressure drop.

Open access

Monika Wałęsa-Chorab, Adam Gorczyński, Damian Marcinkowski, Zbigniew Hnatejko and Violetta Patroniak

photocatalytic properties of new dinuclear helical complex of silver(I) ions. J. Catal . 291, 1-8. DOI: 10.1016/j.jcat.2012.03.025. 14. Yam, V.W.W., Chan, Kenneth, H.Y., Wong, Keith, M.C. & Zhu, N. (2005). Luminescent platinum(II) terpyridyl complexes: effect of counter ions on solvent-induced aggregation and color changes. Chem. Eur. J. 11, 4535-4553. DOI: 10.1002/ chem.200500106. 15. Ji, S., Wu, W., Wu, W., Song, P., Han, K., Wang, Z., Liu, S., Guo, H. & Zhao, J. (2010). Tuning the luminescence lifetimes of ruthenium

Open access

Muhammad Waqar Ashraf

lifetime of supported liquid membrane. J. Memb. Sci., 133, 269–273. DOI: 10.1016/S0376-7388(97)00083-5. 21. Yang, X.J. & Fane, A.G. (1999). Performance and stability of support liquid membrane using LIX 984N for copper transport. J. Memb. Sci. 156, 251–263. DOI: 10.1016/S0376-7388(98)00351-2. 22. Ferriera, F.C., Shejiao, H. & Livingston, G. (2002). Recovery of aniline from aqueous solution using the membrane aromatic recovery system (MARS). Ind. Eng. Chem. Res. 41, 2766. DOI: 10.1021/ie010746l.

Open access

Paulina Rokicka, Agata Markowska-Szczupak, Łukasz Kowalczyk, Ewa Kowalska and Antoni W. Morawski

of the bacterial interaction with visible-light responsive titania photocatalyst on the bacteridical performance. J. Biom. Sci. 16(1), 7. DOI: 10.1186/1423-0127-16-7. 28. Choina, J., Dolat, D., Kusiak, E., Janus, M. & Morawski, A.W. (2009). TiO 2 modified by ammonia as a long lifetime photocatalyst for dyes decomposition. Pol. J. Chem. Technol. 11(4), 1–6. DOI: 10.2478/v10026-009-0035-9. 29. Bubacz, K., Choina, J., Dolat, D. & Morawski, A.W. (2010). Methylene blue and phenol photocatalytic degradation on nanoparticles of anatase TiO 2 . Pol. J. Environ

Open access

Wei Li, Jie Ren, Xiao-Yan Zhao and Takayuki Takarada

carbon nanotubes. Pol. J. Chem. Technol. 19, 61-67. DOI: 10.1515/pjct-2017-0050. 24. Ren, J., Cao, J.P., Zhao, X.Y., Wei, F., Zhu, C. & Wei, X.Y. (2017). Extending catalyst lifetime by doping of Ce in Ni loaded on acid-washed lignite char for biomass catalytic gasifi cation. Catal. Sci.Technol. 7, 5741-5749. DOI: 10.1039/C7CY01670K. 25. Zeng, Y., Ma H.F., Zhang, H.T., Ying, W.Y. & Fang, D.Y. (2014). Impact of heating rate and solvent on Ni-based catalysts prepared by solution combustion method for syngas methanation. Pol. J. Chem