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1.	Mazo, G. N., et al. (author) Influence of structural arrangement of R2O2 slabs of layered cuprates on high-temperature properties important for application in IT-SOFC 2014 In: Solid State Ionics. - : Elsevier BV. - 0167-2738 .- 1872-7689. ; 257, s. 67-74 Journal article (peer-reviewed)abstract Layered cuprates Pr2 - xSrxCuO4-delta with T* (x = 0.3, 0.4) and T (x = 1.0, 13) structures were prepared in air at 1273-1373 K. Oxygen content (4 - delta) of the as-prepared phases decreases from 3.96 (x = 03) and 3.98 (x = 0.4) to 3.69 (x = 1.0) and 3.49 (x = 1.3), respectively, as determined by chemical titration. Dilatometry measurements revealed non-linear expansion with low- and high-temperature regions occurring due to thermogravimetrically detected oxygen loss. Different expansion behaviors in low- and high-temperature regions of T- and T*-phases are attributed to various distributions of oxygen vacancies in their crystal structures. Both x = 0.4 and 1.0 ceramic samples exhibit lower conductivity values at high temperatures in comparison with undoped Pr2CuO4. The temperature dependences of the electrical conductivity at variable oxygen partial pressure (Po-2 = 10(-4)-0.21 atm) reveal different mechanisms of the holes generation in x = 0.4 and 1.0 compounds. The tracer diffusion coefficient of oxygen (D-T) in Pr1.6Sr0.4CuO3.98 determined by isotopic exchange depth profile (IEDP) technique using secondary ion mass spectrometry (SIMS) is in the range 6.7 x 10(-10)-5.7 x 10(-8) cm(2)/s at 973-1223 K. Obtained values are in between those for La2CuO4 and Pr2CuO4 with pure rock-salt and fluorite slabs in the crystal structure, respectively. This shows the importance of rock-salt slabs for high oxygen conductivity in R2MO4 oxides.
2.	Sjomina, O, et al. (author) Clarithromycin-containing triple therapy for Helicobacter pylori eradication is inducing increased long-term resistant bacteria communities in the gut 2024 In: Gut. - 1468-3288. ; 73:7, s. 1214-1215 Journal article (other academic/artistic)

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Type of publication: journal article (2)

Type of content: other academic/artistic (1); peer-reviewed (1)

Author/Editor: Engstrand, L (1); Shen, Zhijian (1); Leja, M (1); Park, JY (1); Svensson, Gunnar (1); Liu, Yi (1); show more...; Istomin, S. Ya. (1); Leonova, E. (1); Antipov, E. V. (1); Fedotov, Yu. S. (1); Bredikhin, S. I. (1); Lyskov, N. V. (1); Kazakov, S. M. (1); Mazo, G. N. (1); Kolchina, L. M. (1); Galin, M. Z. (1); Leonova, L. S. (1); Sjomina, O (1); Vangravs, R (1); Poļaka, I (1); Pūpola, D (1); Čivkulis, K (1); Jeniceka, A (1); Paršutins, S (1); Stonāns, I (1); show less...

University: Stockholm University (1); Karolinska Institutet (1)

Language: English (2)

Research subject (UKÄ/SCB): Natural sciences (1)

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