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Early fungi from the Proterozoic era in Arctic Canada

mercredi 22 mai 2019 par Corentin C. Loron, Camille François, Robert H. Rainbird, Elizabeth C. Turner, Stephan Borensztajn, Emmanuelle J. Javaux
Nature, Published online: 22 May 2019; doi:10.1038/s41586-019-1217-0Morphological, ultrastructural and spectroscopic analyses identify a fungal affinity for microfossils in shale from Arctic Canada, which pushes back the date for this kingdom to 1,010–890 million years (...)

Lattice anchoring stabilizes solution-processed semiconductors

mercredi 22 mai 2019 par Mengxia Liu, Yuelang Chen, Chih-Shan Tan, Rafael Quintero-Bermudez, Andrew H. Proppe, Rahim Munir, Hairen Tan, Oleksandr Voznyy, Benjamin Scheffel, Grant Walters, Andrew Pak Tao Kam, Bin Sun, Min-Jae Choi, Sjoerd Hoogland, Aram Amassian, Shana O. Kelley, F. Pelayo García de Arquer, Edward H. Sargent
Nature, Published online: 22 May 2019; doi:10.1038/s41586-019-1239-7The stability of both colloidal quantum dots and perovskites can be improved by combining them into a hybrid material in which matched lattice parameters suppress the formation of undesired (...)

Epitaxial growth of a 100-square-centimetre single-crystal hexagonal boron nitride monolayer on copper

mercredi 22 mai 2019 par Li Wang, Xiaozhi Xu, Leining Zhang, Ruixi Qiao, Muhong Wu, Zhichang Wang, Shuai Zhang, Jing Liang, Zhihong Zhang, Zhibin Zhang, Wang Chen, Xuedong Xie, Junyu Zong, Yuwei Shan, Yi Guo, Marc Willinger, Hui Wu, Qunyang Li, Wenlong Wang, Peng Gao, Shiwei Wu, Yi Zhang, Ying Jiang, Dapeng Yu, Enge Wang, Xuedong Bai, Zhu-Jun Wang, Feng Ding, Kaihui Liu
Nature, Published online: 22 May 2019; doi:10.1038/s41586-019-1226-zThe epitaxial growth of large single-crystal hexagonal boron nitride monolayers on low-symmetry copper foils is demonstrated.

Superconductivity near room temperature

mercredi 22 mai 2019 par James J. Hamlin
Nature, Published online: 22 May 2019; doi:10.1038/d41586-019-01583-yFor a century, researchers have sought materials that superconduct — transport electricity without loss — at room temperature. Experimental data now confirm superconductivity at higher temperatures than ever (...)

Guarding the gate for mitochondrial entry

mercredi 22 mai 2019 par Sylvie Callegari, Peter Rehling
Nature, Published online: 22 May 2019; doi:10.1038/d41586-019-01588-7The protein-import systems of organelles can become clogged by proteins. A protein from one organelle, the endoplasmic reticulum, is found to also unclog such blockages in mitochondrial (...)

Superconductivity at 250 K in lanthanum hydride under high pressures

mercredi 22 mai 2019 par A. P. Drozdov, P. P. Kong, V. S. Minkov, S. P. Besedin, M. A. Kuzovnikov, S. Mozaffari, L. Balicas, F. F. Balakirev, D. E. Graf, V. B. Prakapenka, E. Greenberg, D. A. Knyazev, M. Tkacz, M. I. Eremets
Nature, Published online: 22 May 2019; doi:10.1038/s41586-019-1201-8A lanthanum hydride compound at a pressure of around 170 gigapascals is found to exhibit superconductivity with a critical temperature of 250 kelvin.

The rheology and thermal history of Mars revealed by the orbital evolution of Phobos

mercredi 22 mai 2019 par Henri Samuel, Philippe Lognonné, Mark Panning, Valéry Lainey
Nature, Published online: 22 May 2019; doi:10.1038/s41586-019-1202-7Insights into the thermal and rheological history of Mars are generated by considering the interplay between the thermochemistry of the planet and the orbital evolution of its closest satellite, (...)

Closing in on what motivates motivation

mercredi 22 mai 2019 par Margaret E. Rice
Nature, Published online: 22 May 2019; doi:10.1038/d41586-019-01589-6The neurotransmitter dopamine facilitates learning, motivation and movement. Evidence of its release independently of the activity of dopamine-producing neurons in rat brains forces a rethink of dopamine (...)

Genome–lamina interactions are established de novo in the early mouse embryo

mercredi 22 mai 2019 par Máté Borsos, Sara M. Perricone, Tamás Schauer, Julien Pontabry, Kim L. de Luca, Sandra S. de Vries, Elias R. Ruiz-Morales, Maria-Elena Torres-Padilla, Jop Kind
Nature, Published online: 22 May 2019; doi:10.1038/s41586-019-1233-0Spatial genome organization into lamina-associated domains is first established in the mouse zygote immediately after fertilization without inheritance from the maternal germline—with the paternal and maternal pronucleus (...)

Rogue emissions of ozone-depleting chemical pinned to China

mercredi 22 mai 2019 par Jeff Tollefson
Nature, Published online: 22 May 2019; doi:10.1038/d41586-019-01647-zFactories in the country’s northeast are likely source of spike in release of CFC-11 gas.

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