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Local Signs and Symptoms in Spontaneous Cervical Artery Dissection: A Single Centre Cohort Study
Lukas Mayer,Christian Boehme,Thomas Toell,Benjamin Dejakum,Johann Willeit,Christoph Schmidauer,Klaus Berek,Christian Siedentopf,Elke Ruth Gizewski,Gudrun Ratzinger,Stefan Kiechl,Michael Knoflach 대한뇌졸중학회 2019 Journal of stroke Vol.21 No.1
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Lee, Ji-Woong,Mayer-Gall, Thomas,Opwis, Klaus,Song, Choong Eui,Gutmann, Jochen Stefan,List, Benjamin American Association for the Advancement of Scienc 2013 Science Vol.341 No.6151
<P><B>Catalytic Parachute</B></P><P>Small organic molecules have emerged as catalysts as versatile as transition metal complexes. However, industrial application of such organocatalysts has been hampered by technical challenges. Now <B>Lee <I>et al.</I></B> (p. 1225) have succeeded in tethering a diverse set of high-performance organocatalysts to nylon fabric through ultraviolet photochemistry, making them easy to isolate and reuse.</P>
Han, Sun-Ho,Varga, Zsolt,Krajkó,, Judit,Wallenius, Maria,Song, Kyuseok,Mayer, Klaus The Royal Society of Chemistry 2013 Journal of analytical atomic spectrometry Vol.28 No.12
<P>A novel method has been developed for the measurement of the <SUP>34</SUP>S/<SUP>32</SUP>S isotope ratio in uranium ore concentrate (yellow cake) samples for origin assessment in nuclear forensics. The leachable sulphate is separated and pre-concentrated by anion exchange separation followed by the <SUP>34</SUP>S/<SUP>32</SUP>S ratio measurement by multi-collector inductively coupled plasma mass spectrometry (MC-ICP-MS). The effect of sample composition on the accuracy was investigated and optimized. Matching of the sample to the bracketing standard was necessary to obtain accurate results. The method was validated by the measurement of standard reference materials (IAEA-S-2, IAEA-S-3 and IAEA-S-4) and the <I>δ</I><SUP>34</SUP>S value could be determined with an uncertainty between 0.45‰ and 1.9‰ expressed with a coverage factor of 2. The method was then applied for the analysis of uranium ore concentrates of world-wide origin. In the studied materials distinct <SUP>34</SUP>S/<SUP>32</SUP>S isotope ratios could be observed, which can be a promising signature for the nuclear forensic investigations to identify the source of unknown nuclear materials.</P> <P>Graphic Abstract</P><P>A novel method developed for the measurement of the sulphur isotopic composition of uranium ore concentrates shows that it can be successfully used for origin assessment in nuclear forensics. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c3ja50231g'> </P>