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Hydrothermal (NN)-N-15-N-15 abundances constrain the origins of mantle nitrogen 期刊论文
NATURE, 2020, 580 (7803) : 367-+
作者:  Zhao, Steven;  Jang, Cholsoon;  Liu, Joyce;  Uehara, Kahealani;  Gilbert, Michael;  Izzo, Luke;  Zeng, Xianfeng;  Trefely, Sophie;  Fernandez, Sully;  Carrer, Alessandro;  Miller, Katelyn D.;  Schug, Zachary T.;  Snyder, Nathaniel W.;  Gade, Terence P.;  Titchenell, Paul M.;  Rabinowitz, Joshua D.;  Wellen, Kathryn E.
收藏  |  浏览/下载：14/0  |  提交时间：2020/05/13

Nitrogen is the main constituent of the Earth'  s atmosphere, but its provenance in the Earth'  s mantle remains uncertain. The relative contribution of primordial nitrogen inherited during the Earth'  s accretion versus that subducted from the Earth'  s surface is unclear(1-6). Here we show that the mantle may have retained remnants of such primordial nitrogen. We use the rare (NN)-N-15-N-15 isotopologue of N-2 as a new tracer of air contamination in volcanic gas effusions. By constraining air contamination in gases from Iceland, Eifel (Germany) and Yellowstone (USA), we derive estimates of mantle delta N-15 (the fractional difference in N-15/N-14 from air), N-2/Ar-36 and N-2/He-3. Our results show that negative delta N-15 values observed in gases, previously regarded as indicating a mantle origin for nitrogen(7-10), in fact represent dominantly air-derived N-2 that experienced N-15/N-14 fractionation in hydrothermal systems. Using two-component mixing models to correct for this effect, the (NN)-N-15-N-15 data allow extrapolations that characterize mantle endmember delta N-15, N-2/Ar-36 and N-2/He-3 values. We show that the Eifel region has slightly increased delta N-15 and N-2/Ar-36 values relative to estimates for the convective mantle provided by mid-ocean-ridge basalts(11), consistent with subducted nitrogen being added to the mantle source. In contrast, we find that whereas the Yellowstone plume has delta N-15 values substantially greater than that of the convective mantle, resembling surface components(12-15), its N-2/Ar-36 and N-2/He-3 ratios are indistinguishable from those of the convective mantle. This observation raises the possibility that the plume hosts a primordial component. We provide a test of the subduction hypothesis with a two-box model, describing the evolution of mantle and surface nitrogen through geological time. We show that the effect of subduction on the deep nitrogen cycle may be less important than has been suggested by previous investigations. We propose instead that high mid-ocean-ridge basalt and plume delta N-15 values may both be dominantly primordial features.


  
A giant exoplanet orbiting a very-low-mass star challenges planet formation models 期刊论文
SCIENCE, 2019, 365 (6460) : 1441-+
作者:  Morales, J. C.;  Mustill, A. J.;  Ribas, I.;  Davies, M. B.;  Reiners, A.;  Bauers, F. F.;  Kossakowski, D.;  Herrero, E.;  Rodriguez, E.;  Lopez-Gonzalez, M. J.;  Rodriguez-Lopez, C.;  Bejar, V. J. S.;  Gonzalez-Cuesta, L.;  Luque, R.;  Palle, E.;  Perger, M.;  Baroch, D.;  Johansen, A.;  Klahr, H.;  Mordasini, C.;  Anglada-Escude, G.;  Caballero, J. A.;  Cortes-Contreras, M.;  Dreizler, S.;  Lafarga, M.;  Nagel, E.;  Passegger, V. M.;  Reffert, S.;  Rosich, A.;  Schweitzer, A.;  Tal-Or, L.;  Trifonov, T.;  Zechmeister, M.;  Quirrenbach, A.;  Amado, P. J.;  Guenther, E. W.;  Hagen, H. -J.;  Henning, T.;  Jeffers, S. V.;  Kaminski, A.;  Kuester, M.;  Montes, D.;  Seifert, W.;  Abellan, F. J.;  Abril, M.;  Aceituno, J.;  Aceituno, F. J.;  Alonso-Floriano, F. J.;  Ammler-von Eiff, M.;  Antona, R.;  Arroyo-Torres, B.;  Azzaro, M.;  Barrado, D.;  Becerril-Jarque, S.;  Benitez, D.;  Berdinas, Z. M.;  Bergond, G.;  Brinkmoller, M.;  del Burgo, C.;  Burn, R.;  Calvo-Ortega, R.;  Cano, J.;  Cardenas, M. C.;  Cardona Guillen, C.;  Carro, J.;  Casa, E.;  Casanova, V.;  Casasayas-Barris, N.;  Chaturvedi, P.;  Cifuentes, C.;  Claret, A.;  Colome, J.;  Czesla, S.;  Diez-Alonso, E.;  Dorda, R.;  Emsenhuber, A.;  Fernandez, M.;  Fernandez-Martin, A.;  Ferro, I. M.;  Fuhrmeister, B.;  Galadi-Enriquez, D.;  Gallardo Cava, I.;  Garcia Vargas, M. L.;  Garcia-Piquer, A.;  Gesa, L.;  Gonzalez-Alvarez, E.;  Gonzalez Hernandez, J. I.;  Gonzalez-Peinado, R.;  Guardia, J.;  Guijarro, A.;  de Guindos, E.;  Hatzes, A. P.;  Hauschildt, P. H.;  Hedrosa, R. P.;  Hermelo, I.;  Hernandez Arabi, R.;  Hernandez Otero, F.;  Hintz, D.;  Holgado, G.;  Huber, A.;  Huke, P.;  Johnson, E. N.;  de Juan, E.;  Kehr, M.;  Kemmer, J.;  Kim, M.;  Klueter, J.;  Klutsch, A.;  Labarga, F.;  Labiche, N.;  Lalitha, S.;  Lampon, M.;  Lara, L. M.;  Launhardt, R.;  Lazaro, F. J.;  Lizon, J. -L.;  Llamas, M.;  Lodieu, N.;  Lopez del Fresno, M.;  Lopez Salas, . F.;  Lopez-Santiago, J.;  Magan Madinabeitia, H.;  Mall, U.;  Mancini, L.;  Mandel, H.;  Marfil, E.;  Marin Molina, J. . A.;  Martin, E. L.;  Martin-Fernandez, P.;  Martin-Ruiz, S.;  Martinez-Rodriguez, H.;  Marvin, C. J.;  Mirabet, E.;  Moya, A.;  Naranjo, V.;  Nelson, R. P.;  Nortmann, L.;  Nowak, G.;  Ofir, A.;  Pascua, J.;  Pavlov, A.;  Pedraz, S.;  Perez Medialdea, D.;  Perez-Calpena, A.;  Perryman, M. A. C.;  Rabaza, O.;  Ramon Ballesta, A.;  Rebolo, R.;  Redondo, P.;  Rix, H. -W.;  Rodler, F.;  Rodriguez Trinidad, A.;  Sabotta, S.;  Sadegi, S.;  Salz, M.;  Sanchez-Blanco, E.;  Sanchez Carrasco, M. A.;  Sanchez-Lopez, A.;  Sanz-Forcada, J.;  Sarkis, P.;  Sarmiento, L. F.;  Schafer, S.;  Schlecker, M.;  Schmitt, J. H. M. M.;  Schofer, P.;  Solano, E.;  Sota, A.;  Stahl, O.;  Stock, S.;  Stuber, T.;  Sturmer, J.;  Suarez, J. C.;  Tabernero, H. M.;  Tulloch, S. M.;  Veredas, G.;  Vico-Linares, J. I.;  Vilardell, F.;  Wagner, K.;  Winkler, J.;  Wolthoff, V.;  Yan, F.;  Zapatero Osorio, M. R.
收藏  |  浏览/下载：16/0  |  提交时间：2019/11/27
Validation of the protein kinase PfCLK3 as a multistage cross-species malarial drug target 期刊论文
SCIENCE, 2019, 365 (6456) : 884-+
作者:  Alam, Mahmood M.;  Sanchez-Azqueta, Ana;  Janha, Omar;  Flannery, Erika L.;  Mahindra, Amit;  Mapesa, Kopano;  Char, Aditya B.;  Sriranganadane, Dev;  Brancucci, Nicolas M. B.;  Antonova-Koch, Yevgeniya;  Crouch, Kathryn;  Simwela, Nelson Victor;  Millar, Scott B.;  Akinwale, Jude;  Mitcheson, Deborah;  Solyakov, Lev;  Dudek, Kate;  Jones, Carolyn;  Zapatero, Cleofe;  Doerig, Christian;  Nwakanma, Davis C.;  Jesus Vazquez, Maria;  Colmenarejo, Gonzalo;  Jose Lafuente-Monasterio, Maria;  Luisa Leon, Maria;  Godoi, Paulo H. C.;  Elkins, Jon M.;  Waters, Andrew P.;  Jamieson, Andrew G.;  Fernandez Alvaro, Elena;  Ranford-Cartwright, Lisa C.;  Marti, Matthias;  Winzeler, Elizabeth A.;  Javier Gamo, Francisco;  Tobin, Andrew B.
收藏  |  浏览/下载：8/0  |  提交时间：2019/11/27
A precise measurement of the magnetic field in the corona of the black hole binary V404 Cygni (vol 358, pg 1299, 2017) 期刊论文
SCIENCE, 2018, 360 (6386)
作者:  Dallilar, Y.;  Eikenberry, S. S.;  Garner, A.;  Stelter, D.;  Gottlieb, A.;  Gandhi, P.;  Casella, P.;  Dhillon, V. S.;  Marsh, T. R.;  Littlefair, S. P.;  Hardy, L.;  Fender, R.;  Mooley, K.;  Walton, D. J.;  Fuerst, F.;  Bachetti, M.;  Castro-Tirado, A. J.;  Charcos, M.;  Edwards, M. L.;  Lasso-Cabrera, N. M.;  Marin-Franch, A.;  Raines, S. N.;  Ackley, K.;  Bennett, J. G.;  Cenarro, A. J.;  Chinn, B.;  Donoso, H. V.;  Frommeyer, R.;  Hanna, K.;  Herlevich, M. D.;  Julian, J.;  Miller, P.;  Mullin, S.;  Murphey, C. H.;  Packham, C.;  Varosi, F.;  Vega, C.;  Warner, C.;  Ramaprakash, A. N.;  Burse, M.;  Punnadi, S.;  Chordia, P.;  Gerarts, A.;  Martin, H. de Paz;  Calero, M. Martin;  Scarpa, R.;  Acosta, S. Fernandez;  Sanchez, W. M. Hernandez;  Siegel, B.;  Perez, F. Francisco;  Martin, H. D. Viera;  Losada, J. A. Rodriguez;  Nunez, A.;  Tejero, A.;  Gonzalez, C. E. Martin;  Rodriguez, C. Cabrera;  Molgo, J.;  Rodriguez, J. Esteban;  Caceres, J. I. Fernandez;  Garcia, L. A. Rodriguez;  Lopez, M. Huertas;  Dominguez, R.;  Gaggstatter, T.;  Lavers, A. Cabrera;  Geier, S.;  Pessev, P.;  Sarajedini, A.
收藏  |  浏览/下载：10/0  |  提交时间：2019/11/27
High fire-derived nitrogen deposition on central African forests 期刊论文
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA, 2018, 115 (3) : 549-554
作者:  Bauters, Marijn;  Drake, Travis W.;  Verbeeck, Hans;  Bode, Samuel;  Herve-Fernandez, Pedro;  Zito, Phoebe;  Podgorski, David C.;  Boyemba, Faustin;  Makelele, Isaac;  Ntaboba, Landry Cizungu;  Spencer, Robert G. M.;  Boeckx, Pascal
收藏  |  浏览/下载：8/0  |  提交时间：2019/11/27
nitrogen deposition  central Africa  Congo Basin  biomass burning  FT-ICR-MS  
A precise measurement of the magnetic field in the corona of the black hole binary V404 Cygni 期刊论文
SCIENCE, 2017, 358 (6368) : 1299-1302
作者:  Dallilar, Yigit;  Eikenberry, Stephen S.;  Garner, Alan;  Stelter, Richard D.;  Gottlieb, Amy;  Gandhi, Poshak;  Casella, Piergiorgio;  Dhillon, Vik S.;  Marsh, Tom R.;  Littlefair, Stuart P.;  Hardy, Liam;  Fender, Rob;  Mooley, Kunal;  Walton, Dominic J.;  Fuerst, Felix;  Bachetti, Matteo;  Castro-Tirado, A. J.;  Charcos, Miguel;  Edwards, Michelle L.;  Lasso-Cabrera, Nestor M.;  Marin-Franch, Antonio;  Raines, S. Nicholas;  Ackley, Kendall;  Bennett, John G.;  Cenarro, A. Javier;  Chinn, Brian;  Donoso, H. Veronica;  Frommeyer, Raymond;  Hanna, Kevin;  Herlevich, Michael D.;  Julian, Jeff;  Miller, Paola;  Mullin, Scott;  Murphey, Charles H.;  Packham, Chris;  Varosi, Frank;  Vega, Claudia;  Warner, Craig;  Ramaprakash, A. N.;  Burse, Mahesh;  Punnadi, Sujit;  Chordia, Pravin;  Gerarts, Andreas;  De Paz Martin, Hector;  Martin Calero, Maria;  Scarpa, Riccardo;  Acosta, Sergio Fernandez;  Hernandez Sanchez, William Miguel;  Siegel, Benjamin;  Francisco Perez, Francisco;  Viera Martin, Himar D.;  Rodriguez Losada, Jose A.;  Nunez, Agustin;  Tejero, Alvaro;  Martin Gonzalez, Carlos E.;  Cabrera Rodriguez, Cesar;  Molgo, Jordi;  Esteban Rodriguez, J.;  Fernandez Caceres, J. Israel;  Rodriguez Garcia, Luis A.;  Huertas Lopez, Manuel;  Dominguez, Raul;  Gaggstatter, Tim;  Cabrera Lavers, Antonio;  Geier, Stefan;  Pessev, Peter;  Sarajedini, Ata
收藏  |  浏览/下载：16/0  |  提交时间：2019/11/27
Systemic pan-AMPK activator MK-8722 improves glucose homeostasis but induces cardiac hypertrophy 期刊论文
SCIENCE, 2017, 357 (6350) : 507-511
作者:  Myers, Robert W.;  Guan, Hong-Ping;  Ehrhart, Juliann;  Petrov, Aleksandr;  Prahalada, Srinivasa;  Tozzo, Effie;  Yang, Xiaodong;  Kurtz, Marc M.;  Trujillo, Maria;  Trotter, Dinko Gonzalez;  Feng, Danqing;  Xu, Shiyao;  Eiermann, George;  Holahan, Marie A.;  Rubins, Daniel;  Conarello, Stacey;  Niu, Xiaoda;  Souza, Sandra C.;  Miller, Corin;  Liu, Jinqi;  Lu, Ku;  Feng, Wen;  Li, Ying;  Painter, Ronald E.;  Milligan, James A.;  He, Huaibing;  Liu, Franklin;  Ogawa, Aimie;  Wisniewski, Douglas;  Rohm, Rory J.;  Wang, Liyang;  Bunzel, Michelle;  Qian, Ying;  Zhu, Wei;  Wang, Hongwu;  Bennet, Bindu;  Scheuch, Lisa LaFranco;  Fernandez, Guillermo E.;  Li, Cai;  Klimas, Michael;  Zhou, Gaochao;  van Heek, Margaret;  Biftu, Tesfaye;  Weber, Ann;  Kelley, David E.;  Thornberry, Nancy;  Erion, Mark D.;  Kemp, Daniel M.;  Sebhat, Iyassu K.
收藏  |  浏览/下载：28/0  |  提交时间：2019/11/27
Decoupled ecomorphological evolution and diversification in Neogene-Quaternary horses 期刊论文
SCIENCE, 2017, 355 (6325) : 627-629
作者:  Cantalapiedra, J. L.;  Prado, J. L.;  Hernandez Fernandez, M.;  Alberdi, M. T.
收藏  |  浏览/下载：0/0  |  提交时间：2019/11/27