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Kang, B.W.,A. Goyal,F.A. List,D.K. Christen,H. R. Kerchner,S. Sathyamurthy,Lee, D.F.,Martin, P.M.,Koreger, D.M. The Korean Superconductivity Society 2002 Progress in superconductivity Vol.4 No.1
We report the effect of Ca doping in $YBa<_2$$Cu_3$O/sub 7-$\delta$/ (YBCO) thin films grown on the Rolling- Assisted, Biaxially Textured Substrates (RABiTS) with the architecture of $CeO_2$/YSZ/CEO$_2$/Ni. Critical currents of bilayer and trilayer structures of YBCO/Y/sub 0.7/Ca/sub 0.3/$Ba_2$$Cu_3$O/sub 7-$\delta$/ (YCaBCO) as well as undoped YBCO for comparison have been measured in a wide range of temperatures and fields. For $6-8^{\circ}$ grain boundaries, 30% Ca-doping in bilayer structure enhances Jc as high as 35 %. The enhancement is larger at low temperatures and at magnetic fields. On the other hand, 30% Ca-doping in trilayer structure reduces Jc as high as 60%. Combined with slightly lower Tc, this indicates that Ca is overdoped in this structure and degrades GBs.
Bae, Han Yong,Sim, Jae Hun,Lee, Ji‐,Woong,List, Benjamin,Song, Choong Eui WILEY‐VCH Verlag 2013 Angewandte Chemie Vol.125 No.46
<P><B>Der Cinchona‐Sulfonamid‐Organokatalysator 1</B> vermittelt die hoch enantioselektive biomimetische Aldolreaktion von Malonsäure‐Halbthioestern mit vielfältigen Aldehyden unter Bildung von optisch aktiven β‐Hydroxythioestern. Das Verfahren bewährte sich in Formalsynthesen der Antidepressiva (<I>R</I>)‐Fluoxetin, (<I>R</I>)‐Tomoxetin, (−)‐Paroxetin und (<I>R</I>)‐Duloxetin.</P>
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>