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435 Newest Publications in proceedings of the national academy of sciences current issue

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matching the following criteria

Hadal biosphere: Insight into the microbial ecosystem in the deepest ocean on Earth [Ecology]

17-Mar-2015 | Takuro Nunoura; Yoshihiro Takaki; Miho Hirai; Shigeru Shimamura; Akiko Makabe; Osamu Koide; Tohru Kikuchi; Junichi M ..., Proceedings of the National Academy of Sciences current issue, 2015

Hadal oceans at water depths below 6,000 m are the least-explored aquatic biosphere. The Challenger Deep, located in the western equatorial Pacific, with a water depth of ∼11 km, is the deepest ocean on Earth. Microbial communities associated with waters from the sea surface to the trench bottom ...

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Visualizing monolayers with a water-soluble fluorophore to quantify adsorption, desorption, and the double layer [Engineering]

24-Feb-2015 | Ian C. Shieh; Joseph A. Zasadzinski, Proceedings of the National Academy of Sciences current issue, 2015

Contrast in confocal microscopy of phase-separated monolayers at the air–water interface can be generated by the selective adsorption of water-soluble fluorescent dyes to disordered monolayer phases. Optical sectioning minimizes the fluorescence signal from the subphase, whereas convolution of ...

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Correction for Swierk et al., Metal-free organic sensitizers for use in water-splitting dye-sensitized photoelectrochemical cells [Correction]

24-Feb-2015 | Proceedings of the National Academy of Sciences current issue, 2015

CHEMISTRY Correction for “Metal-free organic sensitizers for use in water-splitting dye-sensitized photoelectrochemical cells,” by John R. Swierk, Dalvin D. Méndez-Hernádez, Nicholas S. McCool, Paul Liddell, Yuichi Terazono, Ian Pahk, John J. Tomlin, Nolan V. Oster, Thomas A. Moore, Ana L. Moore, ...

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Efficient solar-to-fuels production from a hybrid microbial-water-splitting catalyst system [Systems Biology]

24-Feb-2015 | Joseph P. Torella; Christopher J. Gagliardi; Janice S. Chen; D. Kwabena Bediako; Brendan Colón; Jeffery C. Way; Pame ..., Proceedings of the National Academy of Sciences current issue, 2015

Photovoltaic cells have considerable potential to satisfy future renewable-energy needs, but efficient and scalable methods of storing the intermittent electricity they produce are required for the large-scale implementation of solar energy. Current solar-to-fuels storage cycles based on water ...

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Sulfur-cycling fossil bacteria from the 1.8-Ga Duck Creek Formation provide promising evidence of evolution's null hypothesis [Earth, Atmospheric, and Planetary Sciences]

17-Feb-2015 | J. William Schopf; Anatoliy B. Kudryavtsev; Malcolm R. Walter; Martin J. Van Kranendonk; Kenneth H. Williford; Reinh ..., Proceedings of the National Academy of Sciences current issue, 2015

The recent discovery of a deep-water sulfur-cycling microbial biota in the ∼2.3-Ga Western Australian Turee Creek Group opened a new window to life's early history. We now report a second such subseafloor-inhabiting community from the Western Australian ∼1.8-Ga Duck Creek Formation. ...

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Proton-coupled electron transfer and the role of water molecules in proton pumping by cytochrome c oxidase [Biophysics and Computational Biology]

17-Feb-2015 | Vivek Sharma; Giray Enkavi; Ilpo Vattulainen; Tomasz Róg; Mårten Wikström, Proceedings of the National Academy of Sciences current issue, 2015

Molecular oxygen acts as the terminal electron sink in the respiratory chains of aerobic organisms. Cytochrome c oxidase in the inner membrane of mitochondria and the plasma membrane of bacteria catalyzes the reduction of oxygen to water, and couples the free energy of the reaction to proton ...

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Rapid loss of lakes on the Mongolian Plateau [Sustainability Science]

17-Feb-2015 | Shengli Tao; Jingyun Fang; Xia Zhao; Shuqing Zhao; Haihua Shen; Huifeng Hu; Zhiyao Tang; Zhiheng Wang; Qinghua Guo, Proceedings of the National Academy of Sciences current issue, 2015

Lakes are widely distributed on the Mongolian Plateau and, as critical water sources, have sustained Mongolian pastures for hundreds of years. However, the plateau has experienced significant lake shrinkage and grassland degradation during the past several decades. To quantify the changes in all ...

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Metal-free organic sensitizers for use in water-splitting dye-sensitized photoelectrochemical cells [Chemistry]

10-Feb-2015 | John R. Swierk; Dalvin D. Méndez-Hernández; Nicholas S. McCool; Paul Liddell; Yuichi Terazono; Ian Pahk; John J. Tom ..., Proceedings of the National Academy of Sciences current issue, 2015

Solar fuel generation requires the efficient capture and conversion of visible light. In both natural and artificial systems, molecular sensitizers can be tuned to capture, convert, and transfer visible light energy. We demonstrate that a series of metal-free porphyrins can drive ...

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Membranes serve as allosteric activators of phospholipase A2, enabling it to extract, bind, and hydrolyze phospholipid substrates [Biochemistry]

10-Feb-2015 | Varnavas D. Mouchlis; Denis Bucher; J. Andrew McCammon; Edward A. Dennis, Proceedings of the National Academy of Sciences current issue, 2015

Defining the molecular details and consequences of the association of water-soluble proteins with membranes is fundamental to understanding protein–lipid interactions and membrane functioning. Phospholipase A2 (PLA2) enzymes, which catalyze the hydrolysis of phospholipid substrates that compose ...

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Efficient meltwater drainage through supraglacial streams and rivers on the southwest Greenland ice sheet [Earth, Atmospheric, and Planetary Sciences]

27-Jan-2015 | Laurence C. Smith; Vena W. Chu; Kang Yang; Colin J. Gleason; Lincoln H. Pitcher; Asa K. Rennermalm; Carl J. Legleite ..., Proceedings of the National Academy of Sciences current issue, 2015

Thermally incised meltwater channels that flow each summer across melt-prone surfaces of the Greenland ice sheet have received little direct study. We use high-resolution WorldView-1/2 satellite mapping and in situ measurements to characterize supraglacial water storage, drainage pattern, and ...

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