TY - JOUR A1 - Taal, H. Rob A1 - St Pourcain, Beate A1 - Thiering, Elisabeth A1 - Das, Shikta A1 - Mook-Kanamori, Dennis O. A1 - Warrington, Nicole M. A1 - Kaakinen, Marika A1 - Kreiner-Moller, Eskil A1 - Bradfield, Jonathan P. A1 - Freathy, Rachel M. A1 - Geller, Frank A1 - Guxens, Monica A1 - Cousminer, Diana L. A1 - Kerkhof, Marjan A1 - Timpson, Nicholas J. A1 - Ikram, M. Arfan A1 - Beilin, Lawrence J. A1 - Bonnelykke, Klaus A1 - Buxton, Jessica L. A1 - Charoen, Pimphen A1 - Chawes, Bo Lund Krogsgaard A1 - Eriksson, Johan A1 - Evans, David M. A1 - Hofman, Albert A1 - Kemp, John P. A1 - Kim, Cecilia E. A1 - Klopp, Norman A1 - Lahti, Jari A1 - Lye, Stephen J. A1 - McMahon, George A1 - Mentch, Frank D. A1 - Mueller-Nurasyid, Martina A1 - O'Reilly, Paul F. A1 - Prokopenko, Inga A1 - Rivadeneira, Fernando A1 - Steegers, Eric A. P. A1 - Sunyer, Jordi A1 - Tiesler, Carla A1 - Yaghootkar, Hanieh A1 - Breteler, Monique M. B. A1 - Debette, Stephanie A1 - Fornage, Myriam A1 - Gudnason, Vilmundur A1 - Launer, Lenore J. A1 - van der Lugt, Aad A1 - Mosley, Thomas H. A1 - Seshadri, Sudha A1 - Smith, Albert V. A1 - Vernooij, Meike W. A1 - Blakemore, Alexandra I. F. A1 - Chiavacci, Rosetta M. A1 - Feenstra, Bjarke A1 - Fernandez-Banet, Julio A1 - Grant, Struan F. A. A1 - Hartikainen, Anna-Liisa A1 - van der Heijden, Albert J. A1 - Iniguez, Carmen A1 - Lathrop, Mark A1 - McArdle, Wendy L. A1 - Molgaard, Anne A1 - Newnham, John P. A1 - Palmer, Lyle J. A1 - Palotie, Aarno A1 - Pouta, Annneli A1 - Ring, Susan M. A1 - Sovio, Ulla A1 - Standl, Marie A1 - Uitterlinden, Andre G. A1 - Wichmann, H-Erich A1 - Vissing, Nadja Hawwa A1 - DeCarli, Charles A1 - van Duijn, Cornelia M. A1 - McCarthy, Mark I. A1 - Koppelman, Gerard H. A1 - Estivill, Xavier A1 - Hattersley, Andrew T. A1 - Melbye, Mads A1 - Bisgaard, Hans A1 - Pennell, Craig E. A1 - Widen, Elisabeth A1 - Hakonarson, Hakon A1 - Smith, George Davey A1 - Heinrich, Joachim A1 - Jarvelin, Marjo-Riitta A1 - Jaddoe, Vincent W. V. A1 - Adair, Linda S. A1 - Ang, Wei A1 - Atalay, Mustafa A1 - van Beijsterveldt, Toos A1 - Bergen, Nienke A1 - Benke, Kelly A1 - Berry, Diane J. A1 - Bradfield, Jonathan P. A1 - Charoen, Pimphen A1 - Coin, Lachlan A1 - Cousminer, Diana L. A1 - Das, Shikta A1 - Davis, Oliver S. P. A1 - Elliott, Paul A1 - Evans, David M. A1 - Feenstra, Bjarke A1 - Flexeder, Claudia A1 - Frayling, Tim A1 - Freathy, Rachel M. A1 - Gaillard, Romy A1 - Geller, Frank A1 - Groen-Blokhuis, Maria A1 - Goh, Liang-Kee A1 - Guxens, Monica A1 - Haworth, Claire M. A. A1 - Hadley, Dexter A1 - Hebebrand, Johannes A1 - Hinney, Anke A1 - Hirschhorn, Joel N. A1 - Holloway, John W. A1 - Holst, Claus A1 - Hottenga, Jouke Jan A1 - Horikoshi, Momoko A1 - Huikari, Ville A1 - Hypponen, Elina A1 - Iniguez, Carmen A1 - Kaakinen, Marika A1 - Kilpelainen, Tuomas O. A1 - Kirin, Mirna A1 - Kowgier, Matthew A1 - Lakka, Hanna-Maaria A1 - Lange, Leslie A. A1 - Lawlor, Debbie A. A1 - Lehtimaki, Terho A1 - Lewin, Alex A1 - Lindgren, Cecilia A1 - Lindi, Virpi A1 - Maggi, Reedik A1 - Marsh, Julie A1 - Middeldorp, Christel A1 - Millwood, Iona A1 - Mook-Kanamori, Dennis O. A1 - Murray, Jeffrey C. A1 - Nivard, Michel A1 - Nohr, Ellen Aagaard A1 - Ntalla, Ioanna A1 - Oken, Emily A1 - O'Reilly, Paul F. A1 - Palmer, Lyle J. A1 - Panoutsopoulou, Kalliope A1 - Pararajasingham, Jennifer A1 - Prokopenko, Inga A1 - Rodriguez, Alina A1 - Salem, Rany M. A1 - Sebert, Sylvain A1 - Siitonen, Niina A1 - Sovio, Ulla A1 - St Pourcain, Beate A1 - Strachan, David P. A1 - Sunyer, Jordi A1 - Taal, H. Rob A1 - Teo, Yik-Ying A1 - Thiering, Elisabeth A1 - Tiesler, Carla A1 - Uitterlinden, Andre G. A1 - Valcarcel, Beatriz A1 - Warrington, Nicole M. A1 - White, Scott A1 - Willemsen, Gonneke A1 - Yaghootkar, Hanieh A1 - Zeggini, Eleftheria A1 - Boomsma, Dorret I. A1 - Cooper, Cyrus A1 - Estivill, Xavier A1 - Gillman, Matthew A1 - Grant, Struan F. A. A1 - Hakonarson, Hakon A1 - Hattersley, Andrew T. A1 - Heinrich, Joachim A1 - Hocher, Berthold A1 - Jaddoe, Vincent W. V. A1 - Jarvelin, Marjo-Riitta A1 - Lakka, Timo A. A1 - McCarthy, Mark I. A1 - Melbye, Mads A1 - Mohlke, Karen L. A1 - Dedoussis, George V. A1 - Ong, Ken K. A1 - Pearson, Ewan R. A1 - Pennell, Craig E. A1 - Price, Thomas S. A1 - Power, Chris A1 - Raitakari, Olli T. A1 - Saw, Seang-Mei A1 - Scherag, Andre A1 - Simell, Olli A1 - Sorensen, Thorkild I. A. A1 - Timpson, Nicholas J. A1 - Widen, Elisabeth A1 - Wilson, James F. A1 - Ang, Wei A1 - van Beijsterveldt, Toos A1 - Bergen, Nienke A1 - Benke, Kelly A1 - Berry, Diane J. A1 - Bradfield, Jonathan P. A1 - Charoen, Pimphen A1 - Coin, Lachlan A1 - Cousminer, Diana L. A1 - Das, Shikta A1 - Elliott, Paul A1 - Evans, David M. A1 - Frayling, Tim A1 - Freathy, Rachel M. A1 - Gaillard, Romy A1 - Groen-Blokhuis, Maria A1 - Guxens, Monica A1 - Hadley, Dexter A1 - Hottenga, Jouke Jan A1 - Huikari, Ville A1 - Hypponen, Elina A1 - Kaakinen, Marika A1 - Kowgier, Matthew A1 - Lawlor, Debbie A. A1 - Lewin, Alex A1 - Lindgren, Cecilia A1 - Marsh, Julie A1 - Middeldorp, Christel A1 - Millwood, Iona A1 - Mook-Kanamori, Dennis O. A1 - Nivard, Michel A1 - O'Reilly, Paul F. A1 - Palmer, Lyle J. A1 - Prokopenko, Inga A1 - Rodriguez, Alina A1 - Sebert, Sylvain A1 - Sovio, Ulla A1 - St Pourcain, Beate A1 - Standl, Marie A1 - Strachan, David P. A1 - Sunyer, Jordi A1 - Taal, H. Rob A1 - Thiering, Elisabeth A1 - Tiesler, Carla A1 - Uitterlinden, Andre G. A1 - Valcarcel, Beatriz A1 - Warrington, Nicole M. A1 - White, Scott A1 - Willemsen, Gonneke A1 - Yaghootkar, Hanieh A1 - Boomsma, Dorret I. A1 - Estivill, Xavier A1 - Grant, Struan F. A. A1 - Hakonarson, Hakon A1 - Hattersley, Andrew T. A1 - Heinrich, Joachim A1 - Jaddoe, Vincent W. V. A1 - Jarvelin, Marjo-Riitta A1 - McCarthy, Mark I. A1 - Pennell, Craig E. A1 - Power, Chris A1 - Timpson, Nicholas J. A1 - Widen, Elisabeth A1 - Ikram, M. Arfan A1 - Fornage, Myriam A1 - Smith, Albert V. A1 - Seshadri, Sudha A1 - Schmidt, Reinhold A1 - Debette, Stephanie A1 - Vrooman, Henri A. A1 - Sigurdsson, Sigurdur A1 - Ropele, Stefan A1 - Coker, Laura H. A1 - Longstreth, W. T. A1 - Niessen, Wiro J. A1 - DeStefano, Anita L. A1 - Beiser, Alexa A1 - Zijdenbos, Alex P. A1 - Struchalin, Maksim A1 - Jack, Clifford R. A1 - Nalls, Mike A. A1 - Au, Rhoda A1 - Hofman, Albert A1 - Gudnason, Haukur A1 - van der Lugt, Aad A1 - Harris, Tamara B. A1 - Meeks, William M. A1 - Vernooij, Meike W. A1 - van Buchem, Mark A. A1 - Catellier, Diane A1 - Gudnason, Vilmundur A1 - Windham, B. Gwen A1 - Wolf, Philip A. A1 - van Duijn, Cornelia M. A1 - Mosley, Thomas H. A1 - Schmidt, Helena A1 - Launer, Lenore J. A1 - Breteler, Monique M. B. A1 - DeCarli, Charles T1 - Common variants at 12q15 and 12q24 are associated with infant head circumference JF - Nature genetics N2 - To identify genetic variants associated with head circumference in infancy, we performed a meta-analysis of seven genome-wide association studies (GWAS) (N = 10,768 individuals of European ancestry enrolled in pregnancy and/or birth cohorts) and followed up three lead signals in six replication studies (combined N = 19,089). rs7980687 on chromosome 12q24 (P = 8.1 x 10(-9)) and rs1042725 on chromosome 12q15 (P = 2.8 x 10(-10)) were robustly associated with head circumference in infancy. Although these loci have previously been associated with adult height(1), their effects on infant head circumference were largely independent of height (P = 3.8 x 10(-7) for rs7980687 and P = 1.3 x 10(-7) for rs1042725 after adjustment for infant height). A third signal, rs11655470 on chromosome 17q21, showed suggestive evidence of association with head circumference (P = 3.9 x 10(-6)). SNPs correlated to the 17q21 signal have shown genome-wide association with adult intracranial volume(2), Parkinson's disease and other neurodegenerative diseases(3-5), indicating that a common genetic variant in this region might link early brain growth with neurological disease in later life. Y1 - 2012 U6 - https://doi.org/10.1038/ng.2238 SN - 1061-4036 VL - 44 IS - 5 SP - 532 EP - + PB - Nature Publ. Group CY - New York ER - TY - JOUR A1 - Ikram, M. Arfan A1 - Fornage, Myriam A1 - Smith, Albert V. A1 - Seshadri, Sudha A1 - Schmidt, Reinhold A1 - Debette, Stephanie A1 - Vrooman, Henri A. A1 - Sigurdsson, Sigurdur A1 - Ropele, Stefan A1 - Taal, H. Rob A1 - Mook-Kanamori, Dennis O. A1 - Coker, Laura H. A1 - Longstreth, W. T. A1 - Niessen, Wiro J. A1 - DeStefano, Anita L. A1 - Beiser, Alexa A1 - Zijdenbos, Alex P. A1 - Struchalin, Maksim A1 - Jack, Clifford R. A1 - Rivadeneira, Fernando A1 - Uitterlinden, Andre G. A1 - Knopman, David S. A1 - Hartikainen, Anna-Liisa A1 - Pennell, Craig E. A1 - Thiering, Elisabeth A1 - Steegers, Eric A. P. A1 - Hakonarson, Hakon A1 - Heinrich, Joachim A1 - Palmer, Lyle J. A1 - Jarvelin, Marjo-Riitta A1 - McCarthy, Mark I. A1 - Grant, Struan F. A. A1 - St Pourcain, Beate A1 - Timpson, Nicholas J. A1 - Smith, George Davey A1 - Sovio, Ulla A1 - Nalls, Mike A. A1 - Au, Rhoda A1 - Hofman, Albert A1 - Gudnason, Haukur A1 - van der Lugt, Aad A1 - Harris, Tamara B. A1 - Meeks, William M. A1 - Vernooij, Meike W. A1 - van Buchem, Mark A. A1 - Catellier, Diane A1 - Jaddoe, Vincent W. V. A1 - Gudnason, Vilmundur A1 - Windham, B. Gwen A1 - Wolf, Philip A. A1 - van Duijn, Cornelia M. A1 - Mosley, Thomas H. A1 - Schmidt, Helena A1 - Launer, Lenore J. A1 - Breteler, Monique M. B. A1 - DeCarli, Charles A1 - Adair, Linda S. A1 - Ang, Wei A1 - Atalay, Mustafa A1 - vanBeijsterveldt, Toos A1 - Bergen, Nienke A1 - Benke, Kelly A1 - Berry, Diane J. A1 - Coin, Lachlan A1 - Davis, Oliver S. P. A1 - Elliott, Paul A1 - Flexeder, Claudia A1 - Frayling, Tim A1 - Gaillard, Romy A1 - Groen-Blokhuis, Maria A1 - Goh, Liang-Kee A1 - Haworth, Claire M. A. A1 - Hadley, Dexter A1 - Hebebrand, Johannes A1 - Hinney, Anke A1 - Hirschhorn, Joel N. A1 - Holloway, John W. A1 - Holst, Claus A1 - Hottenga, Jouke Jan A1 - Horikoshi, Momoko A1 - Huikari, Ville A1 - Hypponen, Elina A1 - Kilpelainen, Tuomas O. A1 - Kirin, Mirna A1 - Kowgier, Matthew A1 - Lakka, Hanna-Maaria A1 - Lange, Leslie A. A1 - Lawlor, Debbie A. A1 - Lehtimaki, Terho A1 - Lewin, Alex A1 - Lindgren, Cecilia A1 - Lindi, Virpi A1 - Maggi, Reedik A1 - Marsh, Julie A1 - Middeldorp, Christel A1 - Millwood, Iona A1 - Murray, Jeffrey C. A1 - Nivard, Michel A1 - Nohr, Ellen Aagaard A1 - Ntalla, Ioanna A1 - Oken, Emily A1 - Panoutsopoulou, Kalliope A1 - Pararajasingham, Jennifer A1 - Rodriguez, Alina A1 - Salem, Rany M. A1 - Sebert, Sylvain A1 - Siitonen, Niina A1 - Strachan, David P. A1 - Teo, Yik-Ying A1 - Valcarcel, Beatriz A1 - Willemsen, Gonneke A1 - Zeggini, Eleftheria A1 - Boomsma, Dorret I. A1 - Cooper, Cyrus A1 - Gillman, Matthew A1 - Hocher, Berthold A1 - Lakka, Timo A. A1 - Mohlke, Karen L. A1 - Dedoussis, George V. A1 - Ong, Ken K. A1 - Pearson, Ewan R. A1 - Price, Thomas S. A1 - Power, Chris A1 - Raitakari, Olli T. A1 - Saw, Seang-Mei A1 - Scherag, Andre A1 - Simell, Olli A1 - Sorensen, Thorkild I. A. A1 - Wilson, James F. T1 - Common variants at 6q22 and 17q21 are associated with intracranial volume JF - Nature genetics N2 - During aging, intracranial volume remains unchanged and represents maximally attained brain size, while various interacting biological phenomena lead to brain volume loss. Consequently, intracranial volume and brain volume in late life reflect different genetic influences. Our genome-wide association study (GWAS) in 8,175 community-dwelling elderly persons did not reveal any associations at genome-wide significance (P < 5 x 10(-8)) for brain volume. In contrast, intracranial volume was significantly associated with two loci: rs4273712 (P = 3.4 x 10(-11)), a known height-associated locus on chromosome 6q22, and rs9915547 (P = 1.5 x 10(-12)), localized to the inversion on chromosome 17q21. We replicated the associations of these loci with intracranial volume in a separate sample of 1,752 elderly persons (P = 1.1 x 10(-3) for 6q22 and 1.2 x 10(-3) for 17q21). Furthermore, we also found suggestive associations of the 17q21 locus with head circumference in 10,768 children (mean age of 14.5 months). Our data identify two loci associated with head size, with the inversion at 17q21 also likely to be involved in attaining maximal brain size. Y1 - 2012 U6 - https://doi.org/10.1038/ng.2245 SN - 1061-4036 VL - 44 IS - 5 SP - 539 EP - + PB - Nature Publ. Group CY - New York ER - TY - JOUR A1 - Wuttke, Matthias A1 - Li, Yong A1 - Li, Man A1 - Sieber, Karsten B. A1 - Feitosa, Mary F. A1 - Gorski, Mathias A1 - Tin, Adrienne A1 - Wang, Lihua A1 - Chu, Audrey Y. A1 - Hoppmann, Anselm A1 - Kirsten, Holger A1 - Giri, Ayush A1 - Chai, Jin-Fang A1 - Sveinbjornsson, Gardar A1 - Tayo, Bamidele O. A1 - Nutile, Teresa A1 - Fuchsberger, Christian A1 - Marten, Jonathan A1 - Cocca, Massimiliano A1 - Ghasemi, Sahar A1 - Xu, Yizhe A1 - Horn, Katrin A1 - Noce, Damia A1 - Van der Most, Peter J. A1 - Sedaghat, Sanaz A1 - Yu, Zhi A1 - Akiyama, Masato A1 - Afaq, Saima A1 - Ahluwalia, Tarunveer Singh A1 - Almgren, Peter A1 - Amin, Najaf A1 - Arnlov, Johan A1 - Bakker, Stephan J. L. A1 - Bansal, Nisha A1 - Baptista, Daniela A1 - Bergmann, Sven A1 - Biggs, Mary L. A1 - Biino, Ginevra A1 - Boehnke, Michael A1 - Boerwinkle, Eric A1 - Boissel, Mathilde A1 - Böttinger, Erwin A1 - Boutin, Thibaud S. A1 - Brenner, Hermann A1 - Brumat, Marco A1 - Burkhardt, Ralph A1 - Butterworth, Adam S. A1 - Campana, Eric A1 - Campbell, Archie A1 - Campbell, Harry A1 - Canouil, Mickael A1 - Carroll, Robert J. A1 - Catamo, Eulalia A1 - Chambers, John C. A1 - Chee, Miao-Ling A1 - Chee, Miao-Li A1 - Chen, Xu A1 - Cheng, Ching-Yu A1 - Cheng, Yurong A1 - Christensen, Kaare A1 - Cifkova, Renata A1 - Ciullo, Marina A1 - Concas, Maria Pina A1 - Cook, James P. A1 - Coresh, Josef A1 - Corre, Tanguy A1 - Sala, Cinzia Felicita A1 - Cusi, Daniele A1 - Danesh, John A1 - Daw, E. Warwick A1 - De Borst, Martin H. A1 - De Grandi, Alessandro A1 - De Mutsert, Renee A1 - De Vries, Aiko P. J. A1 - Degenhardt, Frauke A1 - Delgado, Graciela A1 - Demirkan, Ayse A1 - Di Angelantonio, Emanuele A1 - Dittrich, Katalin A1 - Divers, Jasmin A1 - Dorajoo, Rajkumar A1 - Eckardt, Kai-Uwe A1 - Ehret, Georg A1 - Elliott, Paul A1 - Endlich, Karlhans A1 - Evans, Michele K. A1 - Felix, Janine F. A1 - Foo, Valencia Hui Xian A1 - Franco, Oscar H. A1 - Franke, Andre A1 - Freedman, Barry I. A1 - Freitag-Wolf, Sandra A1 - Friedlander, Yechiel A1 - Froguel, Philippe A1 - Gansevoort, Ron T. A1 - Gao, He A1 - Gasparini, Paolo A1 - Gaziano, J. Michael A1 - Giedraitis, Vilmantas A1 - Gieger, Christian A1 - Girotto, Giorgia A1 - Giulianini, Franco A1 - Gogele, Martin A1 - Gordon, Scott D. A1 - Gudbjartsson, Daniel F. A1 - Gudnason, Vilmundur A1 - Haller, Toomas A1 - Hamet, Pavel A1 - Harris, Tamara B. A1 - Hartman, Catharina A. A1 - Hayward, Caroline A1 - Hellwege, Jacklyn N. A1 - Heng, Chew-Kiat A1 - Hicks, Andrew A. A1 - Hofer, Edith A1 - Huang, Wei A1 - Hutri-Kahonen, Nina A1 - Hwang, Shih-Jen A1 - Ikram, M. Arfan A1 - Indridason, Olafur S. A1 - Ingelsson, Erik A1 - Ising, Marcus A1 - Jaddoe, Vincent W. V. A1 - Jakobsdottir, Johanna A1 - Jonas, Jost B. A1 - Joshi, Peter K. A1 - Josyula, Navya Shilpa A1 - Jung, Bettina A1 - Kahonen, Mika A1 - Kamatani, Yoichiro A1 - Kammerer, Candace M. A1 - Kanai, Masahiro A1 - Kastarinen, Mika A1 - Kerr, Shona M. A1 - Khor, Chiea-Chuen A1 - Kiess, Wieland A1 - Kleber, Marcus E. A1 - Koenig, Wolfgang A1 - Kooner, Jaspal S. A1 - Korner, Antje A1 - Kovacs, Peter A1 - Kraja, Aldi T. A1 - Krajcoviechova, Alena A1 - Kramer, Holly A1 - Kramer, Bernhard K. A1 - Kronenberg, Florian A1 - Kubo, Michiaki A1 - Kuhnel, Brigitte A1 - Kuokkanen, Mikko A1 - Kuusisto, Johanna A1 - La Bianca, Martina A1 - Laakso, Markku A1 - Lange, Leslie A. A1 - Langefeld, Carl D. A1 - Lee, Jeannette Jen-Mai A1 - Lehne, Benjamin A1 - Lehtimaki, Terho A1 - Lieb, Wolfgang A1 - Lim, Su-Chi A1 - Lind, Lars A1 - Lindgren, Cecilia M. A1 - Liu, Jun A1 - Liu, Jianjun A1 - Loeffler, Markus A1 - Loos, Ruth J. F. A1 - Lucae, Susanne A1 - Lukas, Mary Ann A1 - Lyytikainen, Leo-Pekka A1 - Magi, Reedik A1 - Magnusson, Patrik K. E. A1 - Mahajan, Anubha A1 - Martin, Nicholas G. A1 - Martins, Jade A1 - Marz, Winfried A1 - Mascalzoni, Deborah A1 - Matsuda, Koichi A1 - Meisinger, Christa A1 - Meitinger, Thomas A1 - Melander, Olle A1 - Metspalu, Andres A1 - Mikaelsdottir, Evgenia K. A1 - Milaneschi, Yuri A1 - Miliku, Kozeta A1 - Mishra, Pashupati P. A1 - Program, V. A. Million Veteran A1 - Mohlke, Karen L. A1 - Mononen, Nina A1 - Montgomery, Grant W. A1 - Mook-Kanamori, Dennis O. A1 - Mychaleckyj, Josyf C. A1 - Nadkarni, Girish N. A1 - Nalls, Mike A. A1 - Nauck, Matthias A1 - Nikus, Kjell A1 - Ning, Boting A1 - Nolte, Ilja M. A1 - Noordam, Raymond A1 - Olafsson, Isleifur A1 - Oldehinkel, Albertine J. A1 - Orho-Melander, Marju A1 - Ouwehand, Willem H. A1 - Padmanabhan, Sandosh A1 - Palmer, Nicholette D. A1 - Palsson, Runolfur A1 - Penninx, Brenda W. J. H. A1 - Perls, Thomas A1 - Perola, Markus A1 - Pirastu, Mario A1 - Pirastu, Nicola A1 - Pistis, Giorgio A1 - Podgornaia, Anna I. A1 - Polasek, Ozren A1 - Ponte, Belen A1 - Porteous, David J. A1 - Poulain, Tanja A1 - Pramstaller, Peter P. A1 - Preuss, Michael H. A1 - Prins, Bram P. A1 - Province, Michael A. A1 - Rabelink, Ton J. A1 - Raffield, Laura M. A1 - Raitakari, Olli T. A1 - Reilly, Dermot F. A1 - Rettig, Rainer A1 - Rheinberger, Myriam A1 - Rice, Kenneth M. A1 - Ridker, Paul M. A1 - Rivadeneira, Fernando A1 - Rizzi, Federica A1 - Roberts, David J. A1 - Robino, Antonietta A1 - Rossing, Peter A1 - Rudan, Igor A1 - Rueedi, Rico A1 - Ruggiero, Daniela A1 - Ryan, Kathleen A. A1 - Saba, Yasaman A1 - Sabanayagam, Charumathi A1 - Salomaa, Veikko A1 - Salvi, Erika A1 - Saum, Kai-Uwe A1 - Schmidt, Helena A1 - Schmidt, Reinhold A1 - Ben Schottker, A1 - Schulz, Christina-Alexandra A1 - Schupf, Nicole A1 - Shaffer, Christian M. A1 - Shi, Yuan A1 - Smith, Albert V. A1 - Smith, Blair H. A1 - Soranzo, Nicole A1 - Spracklen, Cassandra N. A1 - Strauch, Konstantin A1 - Stringham, Heather M. A1 - Stumvoll, Michael A1 - Svensson, Per O. A1 - Szymczak, Silke A1 - Tai, E-Shyong A1 - Tajuddin, Salman M. A1 - Tan, Nicholas Y. Q. A1 - Taylor, Kent D. A1 - Teren, Andrej A1 - Tham, Yih-Chung A1 - Thiery, Joachim A1 - Thio, Chris H. L. A1 - Thomsen, Hauke A1 - Thorleifsson, Gudmar A1 - Toniolo, Daniela A1 - Tonjes, Anke A1 - Tremblay, Johanne A1 - Tzoulaki, Ioanna A1 - Uitterlinden, Andre G. A1 - Vaccargiu, Simona A1 - Van Dam, Rob M. A1 - Van der Harst, Pim A1 - Van Duijn, Cornelia M. A1 - Edward, Digna R. Velez A1 - Verweij, Niek A1 - Vogelezang, Suzanne A1 - Volker, Uwe A1 - Vollenweider, Peter A1 - Waeber, Gerard A1 - Waldenberger, Melanie A1 - Wallentin, Lars A1 - Wang, Ya Xing A1 - Wang, Chaolong A1 - Waterworth, Dawn M. A1 - Bin Wei, Wen A1 - White, Harvey A1 - Whitfield, John B. A1 - Wild, Sarah H. A1 - Wilson, James F. A1 - Wojczynski, Mary K. A1 - Wong, Charlene A1 - Wong, Tien-Yin A1 - Xu, Liang A1 - Yang, Qiong A1 - Yasuda, Masayuki A1 - Yerges-Armstrong, Laura M. A1 - Zhang, Weihua A1 - Zonderman, Alan B. A1 - Rotter, Jerome I. A1 - Bochud, Murielle A1 - Psaty, Bruce M. A1 - Vitart, Veronique A1 - Wilson, James G. A1 - Dehghan, Abbas A1 - Parsa, Afshin A1 - Chasman, Daniel I. A1 - Ho, Kevin A1 - Morris, Andrew P. A1 - Devuyst, Olivier A1 - Akilesh, Shreeram A1 - Pendergrass, Sarah A. A1 - Sim, Xueling A1 - Boger, Carsten A. A1 - Okada, Yukinori A1 - Edwards, Todd L. A1 - Snieder, Harold A1 - Stefansson, Kari A1 - Hung, Adriana M. A1 - Heid, Iris M. A1 - Scholz, Markus A1 - Teumer, Alexander A1 - Kottgen, Anna A1 - Pattaro, Cristian T1 - A catalog of genetic loci associated with kidney function from analyses of a million individuals JF - Nature genetics N2 - Chronic kidney disease (CKD) is responsible for a public health burden with multi-systemic complications. Through transancestry meta-analysis of genome-wide association studies of estimated glomerular filtration rate (eGFR) and independent replication (n = 1,046,070), we identified 264 associated loci (166 new). Of these,147 were likely to be relevant for kidney function on the basis of associations with the alternative kidney function marker blood urea nitrogen (n = 416,178). Pathway and enrichment analyses, including mouse models with renal phenotypes, support the kidney as the main target organ. A genetic risk score for lower eGFR was associated with clinically diagnosed CKD in 452,264 independent individuals. Colocalization analyses of associations with eGFR among 783,978 European-ancestry individuals and gene expression across 46 human tissues, including tubulo-interstitial and glomerular kidney compartments, identified 17 genes differentially expressed in kidney. Fine-mapping highlighted missense driver variants in 11 genes and kidney-specific regulatory variants. These results provide a comprehensive priority list of molecular targets for translational research. Y1 - 2019 U6 - https://doi.org/10.1038/s41588-019-0407-x SN - 1061-4036 SN - 1546-1718 VL - 51 IS - 6 SP - 957 EP - + PB - Nature Publ. Group CY - New York ER - TY - INPR A1 - Acharya, B. S. A1 - Actis, M. A1 - Aghajani, T. A1 - Agnetta, G. A1 - Aguilar, J. A1 - Aharonian, Felix A. A1 - Ajello, M. A1 - Akhperjanian, A. G. A1 - Alcubierre, M. A1 - Aleksic, J. A1 - Alfaro, R. A1 - Aliu, E. A1 - Allafort, A. J. A1 - Allan, D. A1 - Allekotte, I. A1 - Amato, E. A1 - Anderson, J. A1 - Angüner, Ekrem Oǧuzhan A1 - Antonelli, L. A. 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A1 - Zychowski, P. T1 - Introducing the CTA concept T2 - Astroparticle physics N2 - The Cherenkov Telescope Array (CTA) is a new observatory for very high-energy (VHE) gamma rays. CTA has ambitions science goals, for which it is necessary to achieve full-sky coverage, to improve the sensitivity by about an order of magnitude, to span about four decades of energy, from a few tens of GeV to above 100 TeV with enhanced angular and energy resolutions over existing VHE gamma-ray observatories. An international collaboration has formed with more than 1000 members from 27 countries in Europe, Asia, Africa and North and South America. In 2010 the CTA Consortium completed a Design Study and started a three-year Preparatory Phase which leads to production readiness of CTA in 2014. In this paper we introduce the science goals and the concept of CTA, and provide an overview of the project. 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A1 - Royer, S. A1 - Rudak, B. A1 - Rulten, C. B. A1 - Ruppel, J. A1 - Russo, F. A1 - Ryde, F. A1 - Sacco, B. A1 - Saggion, A. A1 - Sahakian, V. A1 - Saito, K. A1 - Saito, T. A1 - Sakaki, N. A1 - Salazar, E. A1 - Salini, A. A1 - Sanchez, F. A1 - Sanchez Conde, M. A. A1 - Santangelo, Andrea A1 - Santos, E. M. A1 - Sanuy, A. A1 - Sapozhnikov, L. A1 - Sarkar, S. A1 - Scalzotto, V. A1 - Scapin, V. A1 - Scarcioffolo, M. A1 - Schanz, T. A1 - Schlenstedt, S. A1 - Schlickeiser, R. A1 - Schmidt, T. A1 - Schmoll, J. A1 - Schroedter, M. A1 - Schultz, C. A1 - Schultze, J. A1 - Schulz, A. A1 - Schwanke, U. A1 - Schwarzburg, S. A1 - Schweizer, T. A1 - Seiradakis, J. A1 - Selmane, S. A1 - Seweryn, K. A1 - Shayduk, M. A1 - Shellard, R. C. A1 - Shibata, T. A1 - Sikora, M. A1 - Silk, J. A1 - Sillanpaa, A. A1 - Sitarek, J. A1 - Skole, C. A1 - Smith, N. A1 - Sobczynska, D. A1 - Sofo Haro, M. A1 - Sol, H. A1 - Spanier, F. A1 - Spiga, D. A1 - Spyrou, S. A1 - Stamatescu, V. A1 - Stamerra, A. A1 - Starling, R. L. C. A1 - Stawarz, L. A1 - Steenkamp, R. A1 - Stegmann, Christian A1 - Steiner, S. A1 - Stergioulas, N. A1 - Sternberger, R. A1 - Stinzing, F. A1 - Stodulski, M. A1 - Straumann, U. A1 - Suarez, A. A1 - Suchenek, M. A1 - Sugawara, R. A1 - Sulanke, K. H. A1 - Sun, S. A1 - Supanitsky, A. D. A1 - Sutcliffe, P. A1 - Szanecki, M. A1 - Szepieniec, T. A1 - Szostek, A. A1 - Szymkowiak, A. A1 - Tagliaferri, G. A1 - Tajima, H. A1 - Takahashi, H. A1 - Takahashi, K. A1 - Takalo, L. A1 - Takami, H. A1 - Talbot, R. G. A1 - Tam, P. H. A1 - Tanaka, M. A1 - Tanimori, T. A1 - Tavani, M. A1 - Tavernet, J. -P. A1 - Tchernin, C. A1 - Tejedor, L. A. A1 - Telezhinsky, Igor O. A1 - Temnikov, P. A1 - Tenzer, C. A1 - Terada, Y. A1 - Terrier, R. A1 - Teshima, M. A1 - Testa, V. A1 - Tibaldo, L. A1 - Tibolla, O. A1 - Tluczykont, M. A1 - Peixoto, C. J. Todero A1 - Tokanai, F. A1 - Tokarz, M. A1 - Toma, K. A1 - Torres, D. F. A1 - Tosti, G. A1 - Totani, T. A1 - Toussenel, F. A1 - Vallania, P. A1 - Vallejo, G. A1 - van der Walt, J. A1 - van Eldik, C. A1 - Vandenbroucke, J. A1 - Vankov, H. A1 - Vasileiadis, G. A1 - Vassiliev, V. V. A1 - Vegas, I. A1 - Venter, L. A1 - Vercellone, S. A1 - Veyssiere, C. A1 - Vialle, J. P. A1 - Videla, M. A1 - Vincent, P. A1 - Vink, J. A1 - Vlahakis, N. A1 - Vlahos, L. A1 - Vogler, P. A1 - Vollhardt, A. A1 - Volpe, F. A1 - Von Gunten, H. P. A1 - Vorobiov, S. A1 - Wagner, S. A1 - Wagner, R. M. A1 - Wagner, B. A1 - Wakely, S. P. A1 - Walter, P. A1 - Walter, R. A1 - Warwick, R. A1 - Wawer, P. A1 - Wawrzaszek, R. A1 - Webb, N. A1 - Wegner, P. A1 - Weinstein, A. A1 - Weitzel, Q. A1 - Welsing, R. A1 - Wetteskind, H. A1 - White, R. A1 - Wierzcholska, A. A1 - Wilkinson, M. I. A1 - Williams, D. A. A1 - Winde, M. A1 - Wischnewski, R. A1 - Wisniewski, L. A1 - Wolczko, A. A1 - Wood, M. A1 - Xiong, Q. A1 - Yamamoto, T. A1 - Yamaoka, K. A1 - Yamazaki, R. A1 - Yanagita, S. A1 - Yoffo, B. A1 - Yonetani, M. A1 - Yoshida, A. A1 - Yoshida, T. A1 - Yoshikoshi, T. A1 - Zabalza, V. A1 - Zagdanski, A. A1 - Zajczyk, A. A1 - Zdziarski, A. A1 - Zech, Alraune A1 - Zietara, K. A1 - Ziolkowski, P. A1 - Zitelli, V. A1 - Zychowski, P. T1 - Design concepts for the Cherenkov Telescope Array CTA an advanced facility for ground-based high-energy gamma-ray astronomy JF - Experimental astronomy : an international journal on astronomical instrumentation and data analysis N2 - Ground-based gamma-ray astronomy has had a major breakthrough with the impressive results obtained using systems of imaging atmospheric Cherenkov telescopes. Ground-based gamma-ray astronomy has a huge potential in astrophysics, particle physics and cosmology. CTA is an international initiative to build the next generation instrument, with a factor of 5-10 improvement in sensitivity in the 100 GeV-10 TeV range and the extension to energies well below 100 GeV and above 100 TeV. CTA will consist of two arrays (one in the north, one in the south) for full sky coverage and will be operated as open observatory. The design of CTA is based on currently available technology. This document reports on the status and presents the major design concepts of CTA. KW - Ground based gamma ray astronomy KW - Next generation Cherenkov telescopes KW - Design concepts Y1 - 2011 U6 - https://doi.org/10.1007/s10686-011-9247-0 SN - 0922-6435 SN - 1572-9508 VL - 32 IS - 3 SP - 193 EP - 316 PB - Springer CY - Dordrecht ER - TY - JOUR A1 - Gorbatenko, M. V. A1 - Pushkin, A. V. A1 - Schmidt, Hans-Jürgen T1 - On a relation between the Bach equation and the equation of geometrodynamics N2 - The Bach equation and the equation of geometrodynamics are based on two quite different physical motivations, but in both approaches, the conformal properties of gravitation plays the key role. In this paper we present an analysis of the relation between these two equations and show that the solutions of the equation of geometrodynamics are of a more general nature. We show the following non-trivial result: there exists a conformally invariant Lagrangian, whose field equation generalizes the Bach equation and has as solutions those Ricci tensors which are solutions to the equation of geometrodynamics. Y1 - 2002 ER - TY - JOUR A1 - Janietz, Dietmar A1 - Festag, R. A1 - Schmidt, C. A1 - Tsukruk, V. V. A1 - Wendorff, Joachim Heinz T1 - Interfacial behaviour and thermal properties of triazine modified triphenylene oligomers Y1 - 1995 ER - TY - JOUR A1 - Srama, Ralf A1 - Krueger, H. A1 - Yamaguchi, T. A1 - Stephan, T. A1 - Burchell, M. A1 - Kearsley, A. T. A1 - Sterken, V. A1 - Postberg, F. A1 - Kempf, S. A1 - Grün, Eberhard A1 - Altobelli, Nicolas A1 - Ehrenfreund, P. A1 - Dikarev, V. A1 - Horanyi, M. A1 - Sternovsky, Zoltan A1 - Carpenter, J. D. A1 - Westphal, A. A1 - Gainsforth, Z. A1 - Krabbe, A. A1 - Agarwal, Jessica A1 - Yano, H. A1 - Blum, J. A1 - Henkel, H. A1 - Hillier, J. A1 - Hoppe, P. A1 - Trieloff, M. A1 - Hsu, S. A1 - Mocker, A. A1 - Fiege, K. A1 - Green, S. F. A1 - Bischoff, A. A1 - Esposito, F. A1 - Laufer, R. A1 - Hyde, T. W. A1 - Herdrich, G. A1 - Fasoulas, S. A1 - Jaeckel, A. A1 - Jones, G. A1 - Jenniskens, P. A1 - Khalisi, E. A1 - Moragas-Klostermeyer, Georg A1 - Spahn, Frank A1 - Keller, H. U. A1 - Frisch, P. A1 - Levasseur-Regourd, A. C. A1 - Pailer, N. A1 - Altwegg, K. A1 - Engrand, C. A1 - Auer, S. A1 - Silen, J. A1 - Sasaki, S. A1 - Kobayashi, M. A1 - Schmidt, J. A1 - Kissel, J. A1 - Marty, B. A1 - Michel, P. A1 - Palumbo, P. A1 - Vaisberg, O. A1 - Baggaley, J. A1 - Rotundi, A. A1 - Roeser, H. P. T1 - SARIM PLUS-sample return of comet 67P/CG and of interstellar matter JF - EXPERIMENTAL ASTRONOMY N2 - The Stardust mission returned cometary, interplanetary and (probably) interstellar dust in 2006 to Earth that have been analysed in Earth laboratories worldwide. Results of this mission have changed our view and knowledge on the early solar nebula. The Rosetta mission is on its way to land on comet 67P/Churyumov-Gerasimenko and will investigate for the first time in great detail the comet nucleus and its environment starting in 2014. Additional astronomy and planetary space missions will further contribute to our understanding of dust generation, evolution and destruction in interstellar and interplanetary space and provide constraints on solar system formation and processes that led to the origin of life on Earth. One of these missions, SARIM-PLUS, will provide a unique perspective by measuring interplanetary and interstellar dust with high accuracy and sensitivity in our inner solar system between 1 and 2 AU. SARIM-PLUS employs latest in-situ techniques for a full characterisation of individual micrometeoroids (flux, mass, charge, trajectory, composition()) and collects and returns these samples to Earth for a detailed analysis. The opportunity to visit again the target comet of the Rosetta mission 67P/Churyumov-Gerasimeenternko, and to investigate its dusty environment six years after Rosetta with complementary methods is unique and strongly enhances and supports the scientific exploration of this target and the entire Rosetta mission. Launch opportunities are in 2020 with a backup window starting early 2026. The comet encounter occurs in September 2021 and the reentry takes place in early 2024. An encounter speed of 6 km/s ensures comparable results to the Stardust mission. KW - Interstellar dust KW - Cometary dust KW - Churyumov Gerasimenko KW - Interplanetary dust KW - IMF KW - Cosmic vision KW - Sample return KW - Dust collector KW - Mass spectrometry Y1 - 2012 U6 - https://doi.org/10.1007/s10686-011-9285-7 SN - 0922-6435 SN - 1572-9508 VL - 33 IS - 2-3 SP - 723 EP - 751 PB - SPRINGER CY - DORDRECHT ER - TY - JOUR A1 - Hwang, Jongkook A1 - Walczak, Ralf A1 - Oschatz, Martin A1 - Tarakina, Nadezda A1 - Schmidt, Bernhard V. K. J. T1 - Micro-Blooming: Hierarchically Porous Nitrogen-Doped Carbon Flowers Derived from Metal-Organic Mesocrystals JF - Small N2 - Synthesis of 3D flower-like zinc-nitrilotriacetic acid (ZnNTA) mesocrystals and their conformal transformation to hierarchically porous N-doped carbon superstructures is reported. During the solvothermal reaction, 2D nanosheet primary building blocks undergo oriented attachment and mesoscale assembly forming stacked layers. The secondary nucleation and growth preferentially occurs at the edges and defects of the layers, leading to formation of 3D flower-like mesocrystals comprised of interconnected 2D micropetals. By simply varying the pyrolysis temperature (550-1000 degrees C) and the removal method of in the situ-generated Zn species, nonporous parent mesocrystals are transformed to hierarchically porous carbon flowers with controllable surface area (970-1605 m(2) g(-1)), nitrogen content (3.4-14.1 at%), pore volume (0.95-2.19 cm(3) g(-1)), as well as pore diameter and structures. The carbon flowers prepared at 550 degrees C show high CO2/N-2 selectivity due to the high nitrogen content and the large fraction of (ultra)micropores, which can greatly increase the CO2 affinity. The results show that the physicochemical properties of carbons are highly dependent on the thermal transformation and associated pore formation process, rather than directly inherited from parent precursors. The present strategy demonstrates metal-organic mesocrystals as a facile and versatile means toward 3D hierarchical carbon superstructures that are attractive for a number of potential applications. KW - 3D flower superstructures KW - hierarchically porous carbon KW - metal-organic mesocrystals KW - thermal transformation mechanism Y1 - 2019 U6 - https://doi.org/10.1002/smll.201901986 SN - 1613-6810 SN - 1613-6829 VL - 15 IS - 37 PB - Wiley-VCH CY - Weinheim ER - TY - JOUR A1 - Spahn, Frank A1 - Schmidt, Jürgen A1 - Albers, Nicole A1 - Hörning, Marcel A1 - Makuch, Martin A1 - Seiß, Martin A1 - Kempf, Sascha A1 - Srama, Ralf A1 - Dikarev, Valeri A1 - Helfert, Stefan A1 - Moragas-Klostermeyer, Georg A1 - Krivov, Alexander V. A1 - Sremcevic, Miodrag A1 - Tuzzolino, Anthony J. A1 - Economou, Thanasis A1 - Grün, Eberhard T1 - Cassini dust measurements at Enceladus and implications for the origin of the E ring Y1 - 2006 UR - http://www.sciencemag.org/content/311/5766/1416.full U6 - https://doi.org/10.1126/science.1121375 ER - TY - JOUR A1 - Gordon, M. K. A1 - Krivov, Alexander V. A1 - Schmidt, Jürgen A1 - Spahn, Frank T1 - Planetary rings Y1 - 2002 ER - TY - JOUR A1 - Sirbescu, Mona-Liza C. A1 - Schmidt, Christian A1 - Veksler, Ilya V. A1 - Whittington, Alan G. A1 - Wilke, Max T1 - Experimental crystallization of undercooled felsic liquids BT - generation of pegmatitic texture JF - Journal of petrology N2 - The crystallization kinetics of silicate liquids were studied experimentally in the system haplogranite-B-Li-H2O, at variable degrees of undercooling and variable water concentration. We investigated the kinetics of nucleation and crystallization of unseeded synthetic hydrous haplogranite with 1 wt % Li2O + 2 center dot 3 wt % B2O3 added (composition C1) and 2 wt % Li2O + 4 center dot 6 wt % B2O3 added (composition C2). Compositions C1 and C2 are simplified representative bulk compositions of Li-rich pegmatites and their highly differentiated cores, respectively. Starting water contents varied between 3 and 9 wt %. With few exceptions, the system remained water-undersaturated. About 86 isothermal runs of 1-60 days duration, grouped in 25 time series of constant temperature and initial H2O content, were carried out at temperatures from 400 to 700A degrees C at 300 MPa, corresponding to variable degrees of undercooling between the liquidus and glass transition. Viscosity measurements indicate that the glass transition for both compositions is below 400A degrees C for 3 wt % water and below 300A degrees C for 6 center dot 5 wt % water. The melts remained virtually crystal free at 400A degrees C, about 100A degrees C and 120A degrees C above the glass transition for compositions C1 and C2, respectively, in experiments up to 30 days long. This result is consistent with the existence of low-temperature, undercooled melts in the crust. At lower values of undercooling the runs crystallized partially, up to about 70% volume fraction. Undercooling and the amount of water are the main factors controlling nucleation and growth rates, and therefore textures. Minerals nucleate and grow sequentially according to mineral-specific nucleation delays. The mineral assemblage started with Li-Al stuffed quartz (in C1) and virgilite (in C2), solid-solutions between quartz and gamma-spodumene. The quartz-like phases were typically followed by spherulitic alkali feldspar-quartz intergrowths, euhedral petalite, and fine-grained muscovite. Nearly pure quartz formed as rims and replacement of metastable virgilite and stuffed quartz, in particular at the boron- and water-rich crystallization front of large feldspar or petalite. With the exception of muscovite, all minerals nucleated heterogeneously, on the capsule wall or on pre-existing minerals, and grew inwards, towards the capsule center. Experimental textures resembled the textures of zoned pegmatites, including skeletal, graphic, unidirectional, radiating, spherulitic, massive, and replacement textures. In some cases, when fluid saturation was reached, miarolitic cavities developed containing euhedral crystals. Although unidirectional growth rates appeared to slow down in time, volumetric rates for stable graphic alkali-feldspar quartz intergrowths and petalite remained constant for up to 60 days and similar to 70% crystallization. Metastable stuffed quartz and virgilite diminished in their growth rates in runs of 30 days or longer, were resorbed in the melt, and were partially replaced by second-generation quartz. Unobstructed, self-sustained crystal growth in conditions of very low nucleation density appears to be the dominant mechanism to form giant pegmatitic crystals, although experimental growth rates are much slower than predicted in nature based on conductive-cooling models. KW - experimental petrology KW - lithium pegmatites KW - igneous texture KW - viscosity KW - crystal nucleation KW - crystal growth rate Y1 - 2017 U6 - https://doi.org/10.1093/petrology/egx027 SN - 0022-3530 SN - 1460-2415 VL - 58 IS - 3 SP - 539 EP - 568 PB - Oxford Univ. Press CY - Oxford ER - TY - JOUR A1 - Al Nakeeb, Noah A1 - Kochovski, Zdravko A1 - Li, Tingting A1 - Zhang, Youjia A1 - Lu, Yan A1 - Schmidt, Bernhard V. K. J. T1 - Poly(ethylene glycol) brush-b-poly(N-vinylpyrrolidone)-based double hydrophilic block copolymer particles crosslinked via crystalline alpha-cyclodextrin domains JF - RSC Advances N2 - Self-assembly of block copolymers is a significant area of polymer science. The self-assembly of completely water-soluble block copolymers is of particular interest, albeit a challenging task. In the present work the self-assembly of a linear-brush architecture block copolymer, namely poly(N-vinylpyrrolidone)-b-poly(oligoethylene glycol methacrylate) (PVP-b-POEGMA), in water is studied. Moreover, the assembled structures are crosslinked via alpha-CD host/guest complexation in a supramolecular way. The crosslinking shifts the equilibrium toward aggregate formation without switching off the dynamic equilibrium of double hydrophilic block copolymer (DHBC). As a consequence, the self-assembly efficiency is improved without extinguishing the unique DHBC self-assembly behavior. In addition, decrosslinking could be induced without a change in concentration by adding a competing complexation agent for alpha-CD. The self-assembly behavior was followed by DLS measurement, while the presence of the particles could be observed via cryo-TEM before and after crosslinking. Y1 - 2019 U6 - https://doi.org/10.1039/c8ra10672j SN - 2046-2069 VL - 9 IS - 9 SP - 4993 EP - 5001 PB - Royal Society of Chemistry CY - Cambridge ER - TY - THES A1 - Schmidt, Bernhard V. K. J. T1 - Polymers, self-assembly and materials BT - from polymer synthesis to applications BT - von der Polymersynthese bis zur Anwendung N2 - In der vorliegenden Arbeit wurden die Selbstorganisation von hydrophilen Polymeren, verstärkte Hydrogele, sowie anorganische/Polymer Hybridmaterialien untersucht. Dabei beschreibt die Arbeit den Weg von Polymersynthese mittels verschiedener Methoden über Polymerselbstanordnung bis zur Herstellung von Polymermaterialien mit vielversprechenden Eigenschaften für zukünftige Anwendungen. Hydrophile Polymere wurden verwendet, um Mehrphasensysteme herzustellen, Wasser-in-Wasser Emulsionen zu bilden und selbstangeordneten Strukturen zu erzeugen, z. B. Partikel/Aggregate oder hohle Strukturen aus komplett wasserlöslichen Bausteinen. Die Strukturbildung in wässriger Umgebung wurde ferner für supramolekulare Hydrogele mit definierter Unterstruktur und reversiblem Gelierungsverhalten eingesetzt. Auf dem Gebiet der Hydrogele wurde das anorganische Material graphitisches Kohlenstoffnitrid (g-CN) als Photoinitiator für die Hydrogelsynthese und als Verstärker der Gelstruktur beschrieben. Hierbei konnten Hydrogele mit herausragenden Eigenschaften generiert werden, z. B. hohe Kompressibilität, hohe Speichermodule oder Gleitfähigkeit. Die Kombinationen von g-CN mit verschiedenen Polymeren erlaubte es zudem neue Materialien für die Photokatalyse bereitzustellen. Als weiteres anorganisches Material wurden Metall-organische Gerüste (MOFs) mit Polymeren kombiniert. Es konnte gezeigt werden, dass die Verwendung von MOFs in der Polymersynthese einen starken Einfluss auf die erzeugte Polymerstruktur hat und MOFs als Katalysator für Polymerisationen verwendet werden können. Zuletzt wurde die MOF Synthese an sich untersucht, wobei Polymeradditive oder Lösungsmittel eingesetzt wurden um die kristalline Struktur der MOFs zu modulieren. Insgesamt wurden hier verschiedene Errungenschaften für die Polymerchemie beschrieben, z.B. neuartige hydrophile Polymere und Hydrogele, die zur Zeit wichtige Materialien im Polymerbereich durch ihre vielversprechenden Anwendungen im biomedizinischen Sektor darstellen. Außerdem ergab die Kombination von Polymeren mit Materialien aus anderen Bereichen der Chemie, z. B. g-CN und MOFs, neue Materialien mit bemerkenswerten Eigenschaften, die ebenfalls von Interesse für zukünftige Anwendungen sind, z. B. Beschichtungen, Partikeltechnologie und Katalyse. N2 - In the present thesis, self-assembly of hydrophilic polymers, reinforced hydrogels and inorganic/polymer hybrids were examined. The thesis describes an avenue from polymer synthesis via various methods over polymer self-assembly to the formation of polymer materials that have promising properties for future applications. Hydrophilic polymers were utilized to form multi-phase systems, water-in-water emulsions and self-assembled structures, e.g. particles/aggregates or hollow structures from completely water-soluble building blocks. The structuring of aqueous environments by hydrophilic homo and block copolymers was further utilized in the formation of supramolecular hydrogels with compartments or specific thermal behavior. Furthermore, inorganic graphitic carbon nitride (g-CN) was utilized as photoinitiator for hydrogel formation and as reinforcer for hydrogels. As such, hydrogels with remarkable mechanical properties were synthesized, e.g. high compressibility, high storage modulus or lubricity. In addition, g-CN was combined with polymers for a broad range of materials, e.g. coatings, films or latex, that could be utilized in photocatalytic applications. Another inorganic material class was combined with polymers in the present thesis as well, namely metal-organic frameworks (MOFs). It was shown that the pore structure of MOFs enables improved control over tacticity and achievement of high molar masses. Furthermore, MOF-based polymerization catalysis was introduced with improved control for coordinating monomers, catalyst recyclability and decreased metal contamination in the product. Finally, the effect of external influence on MOF morphology was studied, e.g. via solvent or polymer additives, which allowed the formation of various MOF structures. Overall, advances in several areas of polymer science are presented in here. A major topic of the thesis was hydrophilic polymers and hydrogels that currently constitute significant materials in the polymer field due to promising future applications in biomedicine. Moreover, the combination of polymers with materials from other areas of research, i.e. g-CN and MOFs, provided various new materials with remarkable properties also of interest for applications in the future, e.g. coatings, particle structures and catalysis. T2 - Polymere, Selbstanordnungen und Materialien KW - block copolymers KW - carbon nitride KW - metal-organic frameworks KW - Blockcopolymere KW - Kohlenstoffnitrid KW - Metall-organische Gerüste Y1 - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-484819 ER - TY - JOUR A1 - Lee, Hui-Chun A1 - Hwang, Jongkook A1 - Schilde, Uwe A1 - Antonietti, Markus A1 - Matyjaszewski, Krzysztof A1 - Schmidt, Bernhard V. K. J. T1 - Toward ultimate control of radical polymerization BT - functionalized metal-organic frameworks as a robust environment for Metal-Catalyzed Polymerizations JF - Chemistry of materials : a publication of the American Chemical Society N2 - Herein, an approach via combination of confined porous textures and reversible deactivation radical polymerization techniques is proposed to advance synthetic polymer chemistry, i.e., a connection of metal-organic frameworks (MOFs) and activators regenerated by electron transfer atom transfer radical polymerization (ARGET ATRP). Zn-2(benzene-1,4-dicarboxylate)2(1,4-diazabicyclo[2.2.2]-octane) [Zn-2(bdc)(2)(dabco)] is utilized as a reaction environment for polymerization of various methacrylate monomers (methyl, ethyl, benzyl, and isobornyl methacrylate) in a confined nanochannel, resulting in polymers with control over dispersity, end functionalities, and tacticity with respect to distinct molecular size. To refine and reconsolidate the compartmentation effect on polymer regularity, initiator-functionalized Zn MOF was synthesized via cocrystallization with an initiator-functionalized ligand, 2-(2-bromo-2-methylpropanamido)-1,4-benzenedicarboxylate (Brbdc), in different ratios (10%, 20%, and 50%). Through the embedded initiator, surface-initiated ARGET ATRP was directly initiated from the walls of the nanochannels. The obtained polymers had a high molecular weight up to 392 000. Moreover, a significant improvement in end-group functionality and stereocontrol was observed, entailing polymers with obvious increments in isotacticity. The results highlight a combination of MOFs and ATRP that is a promising and universal methodology to prepare various polymers with high molecular weight exhibiting well-defined uniformity in chain length and microstructure as well as the preserved chain-end functionality. Y1 - 2018 U6 - https://doi.org/10.1021/acs.chemmater.8b00546 SN - 0897-4756 SN - 1520-5002 VL - 30 IS - 9 SP - 2983 EP - 2994 PB - American Chemical Society CY - Washington ER - TY - JOUR A1 - Tötzke, Christian A1 - Gaiselmann, G. A1 - Osenberg, M. A1 - Arlt, T. A1 - Markötter, H. A1 - Hilger, A. A1 - Kupsch, Andreas A1 - Müller, B. R. A1 - Schmidt, V. A1 - Lehnert, W. A1 - Manke, Ingo T1 - Influence of hydrophobic treatment on the structure of compressed gas diffusion layers JF - Journal of power sources : the international journal on the science and technology of electrochemical energy systems N2 - Carbon fiber based felt materials are widely used as gas diffusion layer (GDL) in fuel cells. Their transport properties can be adjusted by adding hydrophobic agents such as polytetrafluoroethylene (PTFE). We present a synchrotron X-ray tomographic study on the felt material Freudenberg H2315 with different PIPE finishing. In this study, we analyze changes in microstructure and shape of GDLs at increasing degree of compression which are related to their specific PTFE load. A dedicated compression device mimicking the channel-land pattern of the flowfield is used to reproduce the inhomogeneous compression found in a fuel cell. Transport relevant geometrical parameters such as porosity, pore size distribution and geometric tortuosity are calculated and consequences for media transport discussed. PTFE finishing results in a marked change of shape of compressed GDLs: surface is smoothed and the invasion of GDL fibers into the flow field channel strongly mitigated. Furthermore, the PTFE impacts the microstructure of the compressed GDL. The number of available wide transport paths is significantly increased as compared to the untreated material. These changes improve the transport capacity liquid water through the GDL and promote the discharge of liquid water droplets from the cell. (C) 2016 Elsevier B.V. All rights reserved. KW - Gas diffusion layer KW - Synchrotron tomography KW - Compression KW - Hydrophobic treatment KW - Water transport Y1 - 2016 U6 - https://doi.org/10.1016/j.jpowsour.2016.05.118 SN - 0378-7753 SN - 1873-2755 VL - 324 SP - 625 EP - 636 PB - Elsevier CY - Amsterdam ER - TY - JOUR A1 - Brilliantov, Nikolai V. A1 - Schmidt, Jürgen T1 - Aggregation kinetics in a flow : the role of particle-wall collisions N2 - Agglomeration in a fluid flow, when collisions of aggregates with channel walls are important is analyzed. We assume the diffusion-limited mechanism for clusters growth and the Stokes' force exerted on the agglomerates from the flow. Collisions of the particles with the channel walls are modeled by a random Poisson process. We develop an analytical theory for the size distribution of the aggregates and check the theoretical predictions by Monte Carlo simulations. The numerical data agree well with the analytical results. Y1 - 2009 UR - http://www.springerlink.com/content/1951-6355 U6 - https://doi.org/10.1140/epjst/e2009-01006-X SN - 1951-6355 ER - TY - JOUR A1 - Postberg, Frank A1 - Kempf, Sascha A1 - Schmidt, Jürgen A1 - Brilliantov, Nikolai V. A1 - Beinsen, Alexander A1 - Abel, Bernd A1 - Buck, Udo A1 - Srama, Ralf T1 - Sodium salts in E-ring ice grains from an ocean below the surface of Enceladus N2 - Saturn's moon Enceladus emits plumes of water vapour and ice particles from fractures near its south pole(1-5), suggesting the possibility of a subsurface ocean(5-7). These plume particles are the dominant source of Saturn's E ring(7,8). A previous in situ analysis(9) of these particles concluded that the minor organic or siliceous components, identified in many ice grains, could be evidence for interaction between Enceladus' rocky core and liquid water(9,10). It was not clear, however, whether the liquid is still present today or whether it has frozen. Here we report the identification of a population of E-ring grains that are rich in sodium salts (similar to 0.5- 2% by mass), which can arise only if the plumes originate from liquid water. The abundance of various salt components in these particles, as well as the inferred basic pH, exhibit a compelling similarity to the predicted composition of a subsurface Enceladus ocean in contact with its rock core(11). The plume vapour is expected to be free of atomic sodium. Thus, the absence of sodium from optical spectra(12) is in good agreement with our results. In the E ring the upper limit for spectroscopy(12) is insufficiently sensitive to detect the concentrations we found. Y1 - 2009 UR - http://www.nature.com/nature/ U6 - https://doi.org/10.1038/Nature08046 SN - 0028-0836 ER - TY - JOUR A1 - Bodrova, Anna A1 - Schmidt, Jürgen A1 - Spahn, Frank A1 - Brilliantov, Nikolai V. T1 - Adhesion and collisional release of particles in dense planetary rings JF - Icarus : international journal of solar system studies N2 - We propose a simple theoretical model for aggregative and fragmentative collisions in Saturn's dense rings. In this model the ring matter consists of a bimodal size distribution: large (meter sized) boulders and a population of smaller particles (tens of centimeters down to dust). The small particles can adhesively stick to the boulders and can be released as debris in binary collisions of their carriers. To quantify the adhesion force we use the JKR theory (Johnson, K., Kendall, K., Roberts, A. [1971]. Proc. R. Soc. Lond. A 324, 301-313). The rates of release and adsorption of particles are calculated, depending on material parameters, sizes, and plausible velocity dispersions of carriers and debris particles. In steady state we obtain an expression for the amount of free debris relative to the fraction still attached to the carriers. In terms of this conceptually simple model a paucity of subcentimeter particles in Saturn's rings (French, R.G., Nicholson, P.D. [2000]. Icarus 145, 502-523; Marouf, E. et al. [2008]. Abstracts for "Saturn after Cassini-Huygens" Symposium, Imperial College London, UK, July 28 to August 1, p. 113) can be understood as a consequence of the increasing strength of adhesion (relative to inertial forces) for decreasing particle size. In this case particles smaller than a certain critical radius remain tightly attached to the surfaces of larger boulders, even when the boulders collide at their typical speed. Furthermore, we find that already a mildly increased velocity dispersion of the carrier-particles may significantly enhance the fraction of free debris particles, in this way increasing the optical depth of the system. KW - Planetary rings KW - Saturn, Rings KW - Collisional physics Y1 - 2012 U6 - https://doi.org/10.1016/j.icarus.2011.11.011 SN - 0019-1035 SN - 1090-2643 VL - 218 IS - 1 SP - 60 EP - 68 PB - Elsevier CY - San Diego ER - TY - JOUR A1 - Uhlig, Katja A1 - Madaboosi, Narayanan A1 - Schmidt, Stephan A1 - Jäger, Magnus S. A1 - Rose, Jürgen A1 - Duschl, Claus A1 - Volodkin, Dmitry V. T1 - 3d localization and diffusion of proteins in polyelectrolyte multilayers JF - Soft matter N2 - The interaction of diverse biomaterials with surfaces is more crucial than ever for biomedical applications to ensure efficiency and reproducibility. Very interesting surface materials are micrometer-thick polyelectrolyte multilayers. Not only their surface but also the bulk can be loaded with biomaterials like proteins or DNA for various purposes. Therefore, we established a method to analyze the lateral and vertical distribution of fluorescently labelled proteins of various size and charge in polyelectrolyte films composed of poly(L-lysine) and hyaluronic acid by confocal laser scanning microscopy. This approach enables us to measure the diffusion coefficients of the proteins via fluorescence recovery after photobleaching as a function of their vertical position in the film and facilitates the understanding of molecular interactions in the film with a high resolution in both space and time. As a result, we confirm that protein loading in the film is driven by electrostatic interactions - uncharged dextran molecules of 10 and 500 kDa do not diffuse into the film. Proteins of different sizes (3-11 nm) can diffuse relatively fast (D = 2-4 mm(2) s(-1)) independent of their net charge, indicating complex interpolymer interactions. This approach is a new powerful experimental tool to design the polyelectrolyte multilayers for bio-applications by finding a relationship between intermolecular interactions and mobility and availability of biomolecules to biological samples (e.g. cells) or detection units (e.g. biosensors). Y1 - 2012 U6 - https://doi.org/10.1039/c2sm26500a SN - 1744-683X VL - 8 IS - 47 SP - 11786 EP - 11789 PB - Royal Society of Chemistry CY - Cambridge ER -