Journal of Luminescence Volume 187, July 2017, Pages 26-32
I.E. Kolesnikov, D.V.Mamonova, E.Lähderanta , A.V.Kurochkin, M.D.Mikhailov
The impact of doping concentration on structure and photoluminescence of Lu2O3:Eu3+ nanocrystals
Journal of Luminescence Volume 187, July 2017, Pages 26-32
DOI: 10.1016/j.jlumin.2017.03.006

Cubic Eu3+-doped Lu2O3 nanocrystals were synthesized via combined Pechini foaming method. Doping concentration effect on the structural and luminescence properties was studied. It was found that the increase of Eu3+ concentration leads to the growth of unit cell parameters and red shift of Raman lines. The optimal doping concentration and shape of emission lines were studied upon different excitation mechanism. Radiative and nonradiative transition rates and Judd-Ofelt parameters were calculated using the model of 4f–4f intensity theory. The type of multipolar interaction resulting in luminescence concentration quenching was determined.
02.07.17 Завершен телефонный опрос жителей Ленинградской области, посвященный политическим предпочтениям, оценке социально-экономической ситуации, их отношению к институтам власти и общества и к актуальным проблемам региона. Квотная выборка 1500 респондентов. Приступили к обработке данных.
Vestnik SPbSU. Physics and Chemistry Volume 4 (62), issue 1, Pages 34–40
Unksov I.N., Bakulev V.M., Kasyanenko N.A.
Interaction of triethanolamine with high molecular DNA and its influence on formation of surfactant—DNA complexes
Vestnik SPbSU. Physics and Chemistry Volume 4 (62), issue 1, Pages 34–40

Effect of triethanolamine (TEA) on high molecular calf thymus DNA in aqueous solution was studied by fluorescent spectroscopy and viscometry. It was shown that TEA prevents the interaction of the fluorescent dye DAPI with phosphate groups, but does not affect binding of the dye to the minor groove of DNA. The presence of TEA in solution does not induce any changes in the secondary structure of DNA. We estimated the decrease of the volume of DNA molecular coil in solution, which is induced by TEA. The destruction of DNA—surfactant complexes formed in solution was observed after the addition of TEA.
27.06.17 Начат телефонный опрос жителей Ленинградской области, посвященный политическим предпочтениям, оценке социально-экономической ситуации, их отношению к институтам власти и общества и к актуальным проблемам региона. Квотная выборка 1500 респондентов. Научный руководитель проекта Сергей Анатольевич Иванов, доктор экономических наук, ведущий научный сотрудник факультета социологии СПбГУ.
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