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( Stachowiak,R. ),( L. H. Granicka ),( J. Wisniewski ),( M. Lyzniak ),( J. Kawiak ),( J. Bielecki ) 한국미생물 · 생명공학회 2011 Journal of microbiology and biotechnology Vol.21 No.11
Encapsulation of biological material in the permiselective membrane allows to construct a system separating cells from their products, which may find biotechnological as well as biomedical applications in biological processes regulation. Application of a permiselective membrane allows avoiding an attack of the implanted microorganisms on the host. Our aim was to evaluate the performance of Bacillus subtilis encapsulated in an elaborate membrane system producing listeriolysin O, a cytolysin from Listeria monocytogenes, with chosen eukaryotic cells for future application in anticancer treatment. The system of encapsulating in membrane live Bacillus subtilis BR1-S secreting listeriolysin O was proven to exert the effective cytotoxic activity on eukaryotic cells. Interestingly, listeriolysin O showed selective cytotoxic activity on eukaryotic cells: more human leukemia Jurkat T cells were killed than human chronic lymphocytic B cells leukemia at similar conditions in vitro. This system of encapsulated B. subtilis, continuously releasing bacterial products, may affect selectively different types of cells and may have future application in local anticancer treatment.
Luminescence of LiBaF<sub>3</sub> and KMgF<sub>3</sub> doped with Eu<sup>2+</sup>
Mahlik, S.,Wisniewski, K.,Grinberg, M.,Seo, H.J. North-Holland 2010 Journal of non-crystalline solids Vol.356 No.37
In this contribution the results of the high pressure spectroscopy of LiBaF<SUB>3</SUB> and KMgF<SUB>3</SUB> doped with Eu<SUP>2+</SUP>, where high pressure was applied in a diamond anvil cell are summarized. Photoluminescence, time resolved luminescence and luminescence kinetics, at a pressure from ambient to 300kbar, at 77K and ambient temperature are shown and discussed. The LiBaF<SUB>3</SUB>:Eu<SUP>2+</SUP> luminescence spectra consisted of sharp lines peaked at 27,500-28,000cm<SUP>-1</SUP> attributed to the <SUP>6</SUP>P<SUB>7/2</SUB>-><SUP>8</SUP>S<SUB>7/2</SUB> transitions in the 4f<SUP>7</SUP> electronic configuration of Eu<SUP>2+</SUP> and a broad band extended between and 21,000 and 26,600cm<SUP>-1</SUP>, attributed to Eu<SUP>2+</SUP> trapped exciton recombination. When the pressure increased the Eu<SUP>2+</SUP> trapped exciton emission disappeared and was replaced by a sharper band peaked at 28,200cm<SUP>-1</SUP> attributed to 4f<SUP>6</SUP>5d<SUP>1</SUP>(e<SUB>g</SUB>)->4f<SUP>7</SUP>(<SUP>8</SUP>S<SUB>7/2</SUB>) transition in Eu<SUP>2+</SUP>. The KMgF<SUB>3</SUB>:Eu<SUP>2+</SUP> luminescence contained only the sharp lines related to the <SUP>6</SUP>P<SUB>7/2</SUB>-><SUP>8</SUP>S<SUB>7/2</SUB> transition of Eu<SUP>2+</SUP> and was found to be pressure independent, up to 300kbar. The differences in the emission spectra between LiBaF<SUB>3</SUB>:Eu<SUP>2+</SUP> and KMgF<SUB>3</SUB>:Eu<SUP>2+</SUP> are discussed in the context of the structure of Eu<SUP>2+</SUP> sites in perovskite and inversed perovskite lattices.
Precision Control of the Electron Longitudinal Bunch Shape Using an Emittance-Exchange Beam Line
Ha, G.,Cho, M. H.,Namkung, W.,Power, J. G.,Doran, D. S.,Wisniewski, E. E.,Conde, M.,Gai, W.,Liu, W.,Whiteford, C.,Gao, Q.,Kim, K.-J.,Zholents, A.,Sun, Y.-E,Jing, C.,Piot, P. American Physical Society 2017 Physical Review Letters Vol.118 No.10