ALBERT

Description: Synchrotron X-ray diffraction data were obtained to simultaneously measure unit-cell volumes of W and WO 2 at pressures and temperatures up to 70 GPa and 2300 K. Both W and WO 2 unit-cell volume data were fit to Mie-Grüneisen equations of state; parameters for W are K T = 307 (±0.4) GPa, K ' T = 4.05 (±0.04), 0 = 1.61 (±0.03), and q = 1.54 (±0.13). Three phases were observed in WO 2 with structures in the P 2 1 / c , Pnma , and C 2/ c space groups. The transition pressures are 4 and 32 GPa for the P 2 1 / c-Pnma and Pnma-C 2/ c phase changes, respectively. The P 2 1 / c and Pnma phases have previously been described, whereas the C 2/ c phase is newly described here. Equations of state were fitted for these phases over their respective pressure ranges yielding the parameters K T = 238 (±7), 230 (±5), 304 (±3) GPa, K ' T = 4 (fixed), 4 (fixed), 4 (fixed) GPa, 0 = 1.45 (±0.18), 1.22 (±0.07), 1.21 (±0.12), and q = 1 (fixed), 2.90 (±1.5), 1 (fixed) for the P 2 1 / c , Pnma , and C 2/ c phases, respectively. The W-WO 2 buffer (WWO) was extended to high pressure using these W and WO 2 equations of state. The T - f O 2 slope of the WWO buffer along isobars is positive from 1000 to 2500 K with increasing pressure up to at least 60 GPa. The WWO buffer is at a higher f O 2 than the iron-wüstite (IW) buffer at pressures lower than 40 GPa, and the magnitude of this difference decreases at higher pressures. This implies an increasingly lithophile character for W at higher pressures. The WWO buffer was quantitatively applied to W metal-silicate partitioning by using the WWO-IW buffer difference in combination with literature data on W metal-silicate partitioning to model the exchange coefficient ( K D ) for the Fe-W exchange reaction. This approach captures the non-linear pressure dependence of W metal-silicate partitioning using the WWO-IW buffer difference. Calculation of K D along a peridotite liquidus predicts a decrease in W siderophility at higher pressures that supports the qualitative behavior predicted by the WWO-IW buffer difference, and agrees with findings of others. Comparing the competing effects of temperature and pressure the results here indicate that pressure exerts a greater effect on W metal-silicate partitioning.

Description: 〈p〉The collective self-organization of cells into three-dimensional structures can give rise to emergent physical properties such as fluid behavior. Here, we demonstrate that tissues growing on curved surfaces develop shapes with outer boundaries of constant mean curvature, similar to the energy minimizing forms of liquids wetting a surface. The amount of tissue formed depends on the shape of the substrate, with more tissue being deposited on highly concave surfaces, indicating a mechano-biological feedback mechanism. Inhibiting cell-contractility further revealed that active cellular forces are essential for generating sufficient surface stresses for the liquid-like behavior and growth of the tissue. This suggests that the mechanical signaling between cells and their physical environment, along with the continuous reorganization of cells and matrix is a key principle for the emergence of tissue shape.〈/p〉

Description: A thermo-mechanical process consisting of cold rolling and subsequent reversion annealing was applied to high-alloy metastable austenitic CrMnNi steels with different nickel contents. As a result of the reversion annealing ultrafine grained material with a grain size in the range between 500 nm up to 4 ?m were obtained improving the strength behavior of the material. The evolution of the texture of both the cold rolled states and the reversion-annealed states was studied either by X-ray diffraction or by EBSD measurements. The nickel content has a significant influence on the austenite stability and consequently also on the amount of the martensitic phase transformation. However, the developed textures in both steel variants with different austenite stability revealed the same behavior. In both investigated steels the texture of the reverted austenite is a pronounced Bs-type texture as developed also for the deformed austenite

Description: Identifying potentially unique features of the human cerebral cortex is a first step to understanding how evolution has shaped the brain in our species. By analyzing MR images obtained from 177 humans and 73 chimpanzees, we observed a human-specific asymmetry in the superior temporal sulcus at the heart of the...

Description: Fusion between membranes is mediated by specific SNARE complexes. Here we report that fibroblasts survive the absence of the trans-Golgi network/early endosomal SNARE vti1a and the late endosomal SNARE vti1b with intact organelle morphology and minor trafficking defects. Because vti1a and vti1b are the only members of their SNARE subclass and the yeast homolog Vti1p is essential for cell survival, these data suggest that more distantly related SNAREs acquired the ability to function in endosomal traffic during evolution. However, absence of vti1a and vti1b resulted in perinatal lethality. Major axon tracts were missing, reduced in size, or misrouted in Vti1a−/− Vti1b−/− embryos. Progressive neurodegeneration was observed in most Vti1a−/− Vti1b−/− peripheral ganglia. Neurons were reduced by more than 95% in Vti1a−/− Vti1b−/− dorsal root and geniculate ganglia at embryonic day 18.5. These data suggest that special demands for endosomal membrane traffic could not be met in Vti1a−/− Vti1b−/− neurons. Vti1a−/− and Vti1b−/− single deficient mice were viable without these neuronal defects, indicating that they can substitute for each other in these processes.

Description: Immunoglobulin (Ig) diversification by somatic hypermutation in germinal center B cells is instrumental for maturation of the humoral immune response, but also bears the risk of excessive or aberrant genetic changes. Thus, introduction of DNA damage by activation-induced cytidine deaminase as well as DNA repair by multiple pathways need to be tightly regulated during the germinal center response to prevent lymphomagenesis. In the present study, we show that DNA damage checkpoint signaling via checkpoint kinase 1 (Chk1) negatively regulates somatic hypermutation. Chk1 inhibition in human B cell lymphoma lines as well as inactivation of Chk1 alleles by gene targeting in DT40 B cells leads to increased somatic hypermutation. This is apparently due to changes in DNA repair pathways regulated by Chk1, such as a decreased homologous recombination efficiency that also leads to decreased Ig gene conversion in DT40. Our data show that Chk1 signaling plays a crucial role in regulation of Ig diversification and sheds unexpected light on potential origins of aberrant somatic hypermutation in B cell lymphomagenesis.

Description: Sustainability, Vol. 10, Pages 1873: Urban Foraging in Berlin: People, Plants and Practices within the Metropolitan Green Infrastructure Sustainability doi: 10.3390/su10061873 Authors: Jonah L. Landor-Yamagata Ingo Kowarik Leonie K. Fischer Gathering wild plants in cities (urban foraging) is likely an important, but understudied human-nature interaction globally. As large European cities are critically understudied in this regard, we performed in-depth ethnography-based interviews in Berlin, Germany, to shed light on the cultural background of foragers, their motivations and which plants and fungi are gathered for which purposes. Results demonstrate multiple uses of 125 taxa, mostly frequently-occurring species but also some Red List species, from a range of formal and informal greenspace types. Both native and non-native species were gathered, with significant differences in use patterns. Use for food was most common, followed by medicinal uses, and personal enjoyment was a frequent motivation, indicating that urban foraging combines provisioning and cultural ecosystem services. Familial and childhood foraging exposure were common, pointing to influences of early-in-life exposure on later-in-life activities and transgenerational aspects of the practice. Results further suggest legacy effects from the post-war and communist eras on foraging knowledge. Although non-commercial foraging is allowed in Berlin, over-harvesting was not evident. Interviews indicate that stewardship of urban biodiversity is common among foragers. Results thus suggest considering urban foraging as a promising vehicle for linking humans with nature when developing a biodiverse urban green infrastructure.

Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Radulescu, Razvan T -- Fischer, Klaus -- Stange, Eduard -- Schulze, Johannes -- New York, N.Y. -- Science. 2010 Apr 16;328(5976):307. doi: 10.1126/science.328.5976.307-b.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/20395494" target="_blank"〉PubMed〈/a〉

Description: A genome-wide association study (GWAS) of educational attainment was conducted in a discovery sample of 101,069 individuals and a replication sample of 25,490. Three independent single-nucleotide polymorphisms (SNPs) are genome-wide significant (rs9320913, rs11584700, rs4851266), and all three replicate. Estimated effects sizes are small (coefficient of determination R(2) approximately 0.02%), approximately 1 month of schooling per allele. A linear polygenic score from all measured SNPs accounts for approximately 2% of the variance in both educational attainment and cognitive function. Genes in the region of the loci have previously been associated with health, cognitive, and central nervous system phenotypes, and bioinformatics analyses suggest the involvement of the anterior caudate nucleus. These findings provide promising candidate SNPs for follow-up work, and our effect size estimates can anchor power analyses in social-science genetics.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3751588/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉   〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3751588/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Rietveld, Cornelius A -- Medland, Sarah E -- Derringer, Jaime -- Yang, Jian -- Esko, Tonu -- Martin, Nicolas W -- Westra, Harm-Jan -- Shakhbazov, Konstantin -- Abdellaoui, Abdel -- Agrawal, Arpana -- Albrecht, Eva -- Alizadeh, Behrooz Z -- Amin, Najaf -- Barnard, John -- Baumeister, Sebastian E -- Benke, Kelly S -- Bielak, Lawrence F -- Boatman, Jeffrey A -- Boyle, Patricia A -- Davies, Gail -- de Leeuw, Christiaan -- Eklund, Niina -- Evans, Daniel S -- Ferhmann, Rudolf -- Fischer, Krista -- Gieger, Christian -- Gjessing, Hakon K -- Hagg, Sara -- Harris, Jennifer R -- Hayward, Caroline -- Holzapfel, Christina -- Ibrahim-Verbaas, Carla A -- Ingelsson, Erik -- Jacobsson, Bo -- Joshi, Peter K -- Jugessur, Astanand -- Kaakinen, Marika -- Kanoni, Stavroula -- Karjalainen, Juha -- Kolcic, Ivana -- Kristiansson, Kati -- Kutalik, Zoltan -- Lahti, Jari -- Lee, Sang H -- Lin, Peng -- Lind, Penelope A -- Liu, Yongmei -- Lohman, Kurt -- Loitfelder, Marisa -- McMahon, George -- Vidal, Pedro Marques -- Meirelles, Osorio -- Milani, Lili -- Myhre, Ronny -- Nuotio, Marja-Liisa -- Oldmeadow, Christopher J -- Petrovic, Katja E -- Peyrot, Wouter J -- Polasek, Ozren -- Quaye, Lydia -- Reinmaa, Eva -- Rice, John P -- Rizzi, Thais S -- Schmidt, Helena -- Schmidt, Reinhold -- Smith, Albert V -- Smith, Jennifer A -- Tanaka, Toshiko -- Terracciano, Antonio -- van der Loos, Matthijs J H M -- Vitart, Veronique -- Volzke, Henry -- Wellmann, Jurgen -- Yu, Lei -- Zhao, Wei -- Allik, Juri -- Attia, John R -- Bandinelli, Stefania -- Bastardot, Francois -- Beauchamp, Jonathan -- Bennett, David A -- Berger, Klaus -- Bierut, Laura J -- Boomsma, Dorret I -- Bultmann, Ute -- Campbell, Harry -- Chabris, Christopher F -- Cherkas, Lynn -- Chung, Mina K -- Cucca, Francesco -- de Andrade, Mariza -- De Jager, Philip L -- De Neve, Jan-Emmanuel -- Deary, Ian J -- Dedoussis, George V -- Deloukas, Panos -- Dimitriou, Maria -- Eiriksdottir, Guethny -- Elderson, Martin F -- Eriksson, Johan G -- Evans, David M -- Faul, Jessica D -- Ferrucci, Luigi -- Garcia, Melissa E -- Gronberg, Henrik -- Guethnason, Vilmundur -- Hall, Per -- Harris, Juliette M -- Harris, Tamara B -- Hastie, Nicholas D -- Heath, Andrew C -- Hernandez, Dena G -- Hoffmann, Wolfgang -- Hofman, Adriaan -- Holle, Rolf -- Holliday, Elizabeth G -- Hottenga, Jouke-Jan -- Iacono, William G -- Illig, Thomas -- Jarvelin, Marjo-Riitta -- Kahonen, Mika -- Kaprio, Jaakko -- Kirkpatrick, Robert M -- Kowgier, Matthew -- Latvala, Antti -- Launer, Lenore J -- Lawlor, Debbie A -- Lehtimaki, Terho -- Li, Jingmei -- Lichtenstein, Paul -- Lichtner, Peter -- Liewald, David C -- Madden, Pamela A -- Magnusson, Patrik K E -- Makinen, Tomi E -- Masala, Marco -- McGue, Matt -- Metspalu, Andres -- Mielck, Andreas -- Miller, Michael B -- Montgomery, Grant W -- Mukherjee, Sutapa -- Nyholt, Dale R -- Oostra, Ben A -- Palmer, Lyle J -- Palotie, Aarno -- Penninx, Brenda W J H -- Perola, Markus -- Peyser, Patricia A -- Preisig, Martin -- Raikkonen, Katri -- Raitakari, Olli T -- Realo, Anu -- Ring, Susan M -- Ripatti, Samuli -- Rivadeneira, Fernando -- Rudan, Igor -- Rustichini, Aldo -- Salomaa, Veikko -- Sarin, Antti-Pekka -- Schlessinger, David -- Scott, Rodney J -- Snieder, Harold -- St Pourcain, Beate -- Starr, John M -- Sul, Jae Hoon -- Surakka, Ida -- Svento, Rauli -- Teumer, Alexander -- LifeLines Cohort Study -- Tiemeier, Henning -- van Rooij, Frank J A -- Van Wagoner, David R -- Vartiainen, Erkki -- Viikari, Jorma -- Vollenweider, Peter -- Vonk, Judith M -- Waeber, Gerard -- Weir, David R -- Wichmann, H-Erich -- Widen, Elisabeth -- Willemsen, Gonneke -- Wilson, James F -- Wright, Alan F -- Conley, Dalton -- Davey-Smith, George -- Franke, Lude -- Groenen, Patrick J F -- Hofman, Albert -- Johannesson, Magnus -- Kardia, Sharon L R -- Krueger, Robert F -- Laibson, David -- Martin, Nicholas G -- Meyer, Michelle N -- Posthuma, Danielle -- Thurik, A Roy -- Timpson, Nicholas J -- Uitterlinden, Andre G -- van Duijn, Cornelia M -- Visscher, Peter M -- Benjamin, Daniel J -- Cesarini, David -- Koellinger, Philipp D -- AA09367/AA/NIAAA NIH HHS/ -- AA11886/AA/NIAAA NIH HHS/ -- BB/F019394/1/Biotechnology and Biological Sciences Research Council/United Kingdom -- CZB/4/710/Chief Scientist Office/United Kingdom -- DA024417/DA/NIDA NIH HHS/ -- DA029377/DA/NIDA NIH HHS/ -- DA05147/DA/NIDA NIH HHS/ -- DA13240/DA/NIDA NIH HHS/ -- ETM/55/Chief Scientist Office/United Kingdom -- F31 DA029377/DA/NIDA NIH HHS/ -- G0600705/Medical Research Council/United Kingdom -- G0700704/Medical Research Council/United Kingdom -- G9815508/Medical Research Council/United Kingdom -- K05 AA017688/AA/NIAAA NIH HHS/ -- MC_PC_U127561128/Medical Research Council/United Kingdom -- MC_UU_12013/1/Medical Research Council/United Kingdom -- MC_UU_12013/3/Medical Research Council/United Kingdom -- MC_UU_12013/5/Medical Research Council/United Kingdom -- MH016880/MH/NIMH NIH HHS/ -- MH066140/MH/NIMH NIH HHS/ -- MR/K026992/1/Medical Research Council/United Kingdom -- P01 AG005842/AG/NIA NIH HHS/ -- P01 CA089392/CA/NCI NIH HHS/ -- P01 GM099568/GM/NIGMS NIH HHS/ -- P01-AG005842/AG/NIA NIH HHS/ -- P01-AG005842-20S2/AG/NIA NIH HHS/ -- P30 AG012810/AG/NIA NIH HHS/ -- P30-AG012810/AG/NIA NIH HHS/ -- R01 AA009367/AA/NIAAA NIH HHS/ -- R01 AA011886/AA/NIAAA NIH HHS/ -- R01 DA013240/DA/NIDA NIH HHS/ -- R01 HL090620/HL/NHLBI NIH HHS/ -- R01 HL105756/HL/NHLBI NIH HHS/ -- R01 HL111314/HL/NHLBI NIH HHS/ -- R01 MH066140/MH/NIMH NIH HHS/ -- R37 DA005147/DA/NIDA NIH HHS/ -- T32 AG000186/AG/NIA NIH HHS/ -- T32 MH016880/MH/NIMH NIH HHS/ -- T32-AG000186-23/AG/NIA NIH HHS/ -- U01 AG009740/AG/NIA NIH HHS/ -- U01 DA024417/DA/NIDA NIH HHS/ -- Z01 AG001050-01/Intramural NIH HHS/ -- ZIA AG000196-03/Intramural NIH HHS/ -- ZIA AG000196-04/Intramural NIH HHS/ -- New York, N.Y. -- Science. 2013 Jun 21;340(6139):1467-71. doi: 10.1126/science.1235488. Epub 2013 May 30.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Department of Applied Economics, Erasmus School of Economics, Erasmus University Rotterdam, Rotterdam, Netherlands.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/23722424" target="_blank"〉PubMed〈/a〉