My watch list
my.chemeurope.com  
Login  

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

rss
matching the following criteria

Redox potential of the terminal quinone electron acceptor QB in photosystem II reveals the mechanism of electron transfer regulation [Biophysics and Computational Biology]

19-Jan-2016 | Yuki Kato; Ryo Nagao; Takumi Noguchi, Proceedings of the National Academy of Sciences current issue, 2016

Photosystem II (PSII) extracts electrons from water at a Mn4CaO5 cluster using light energy and then transfers them to two plastoquinones, the primary quinone electron acceptor QA and the secondary quinone electron acceptor QB. This forward electron transfer is an essential process in light ...

more

Ecosystem heterogeneity determines the ecological resilience of the Amazon to climate change [Sustainability Science]

19-Jan-2016 | Naomi M. Levine; Ke Zhang; Marcos Longo; Alessandro Baccini; Oliver L. Phillips; Simon L. Lewis; Esteban Alvarez-Dáv ..., Proceedings of the National Academy of Sciences current issue, 2016

Amazon forests, which store ∼50% of tropical forest carbon and play a vital role in global water, energy, and carbon cycling, are predicted to experience both longer and more intense dry seasons by the end of the 21st century. However, the climate sensitivity of this ecosystem remains uncertain: ...

more

How faceted liquid droplets grow tails [Applied Physical Sciences]

19-Jan-2016 | Shani Guttman; Zvi Sapir; Moty Schultz; Alexander V. Butenko; Benjamin M. Ocko; Moshe Deutsch; Eli Sloutskin, Proceedings of the National Academy of Sciences current issue, 2016

Liquid droplets, widely encountered in everyday life, have no flat facets. Here we show that water-dispersed oil droplets can be reversibly temperature-tuned to icosahedral and other faceted shapes, hitherto unreported for liquid droplets. These shape changes are shown to originate in the ...

more

In This Issue [This Week in PNAS]

12-Jan-2016 | Proceedings of the National Academy of Sciences current issue, 2016

Forest water loss during the California drought Laser-guided imaging spectroscopy helps image forest canopy water content in 3D. California’s forests provide numerous products and services to the state, such as water provisioning, carbon storage, timber, and ecotourism. However, the 2012–2015 ...

more

Protein structural and surface water rearrangement constitute major events in the earliest aggregation stages of tau [Biophysics and Computational Biology]

12-Jan-2016 | Anna Pavlova; Chi-Yuan Cheng; Maia Kinnebrew; John Lew; Frederick W. Dahlquist; Songi Han, Proceedings of the National Academy of Sciences current issue, 2016

Protein aggregation plays a critical role in the pathogenesis of neurodegenerative diseases, and the mechanism of its progression is poorly understood. Here, we examine the structural and dynamic characteristics of transiently evolving protein aggregates under ambient conditions by directly ...

more

Trace incorporation of heavy water reveals slow and heterogeneous pathogen growth rates in cystic fibrosis sputum [Earth, Atmospheric, and Planetary Sciences]

12-Jan-2016 | Sebastian H. Kopf; Alex L. Sessions; Elise S. Cowley; Carmen Reyes; Lindsey Van Sambeek; Yang Hu; Victoria J. Orphan ..., Proceedings of the National Academy of Sciences current issue, 2016

Effective treatment for chronic infections is undermined by a significant gap in understanding of the physiological state of pathogens at the site of infection. Chronic pulmonary infections are responsible for the morbidity and mortality of millions of immunocompromised individuals worldwide, yet ...

more

Progressive forest canopy water loss during the 2012-2015 California drought [Sustainability Science]

12-Jan-2016 | Gregory P. Asner; Philip G. Brodrick; Christopher B. Anderson; Nicholas Vaughn; David E. Knapp; Roberta E. Martin, Proceedings of the National Academy of Sciences current issue, 2016

The 2012–2015 drought has left California with severely reduced snowpack, soil moisture, ground water, and reservoir stocks, but the impact of this estimated millennial-scale event on forest health is unknown. We used airborne laser-guided spectroscopy and satellite-based models to assess losses ...

more

Global phosphorus retention by river damming [Environmental Sciences]

22-Dec-2015 | Taylor Maavara; Christopher T. Parsons; Christine Ridenour; Severin Stojanovic; Hans H. Dürr; Helen R. Powley; Phili ..., Proceedings of the National Academy of Sciences current issue, 2015

More than 70,000 large dams have been built worldwide. With growing water stress and demand for energy, this number will continue to increase in the foreseeable future. Damming greatly modifies the ecological functioning of river systems. In particular, dam reservoirs sequester nutrient elements ...

more

Low-cost solution to the grid reliability problem with 100% penetration of intermittent wind, water, and solar for all purposes [Sustainability Science]

08-Dec-2015 | Mark Z. Jacobson; Mark A. Delucchi; Mary A. Cameron; Bethany A. Frew, Proceedings of the National Academy of Sciences current issue, 2015

This study addresses the greatest concern facing the large-scale integration of wind, water, and solar (WWS) into a power grid: the high cost of avoiding load loss caused by WWS variability and uncertainty. It uses a new grid integration model and finds low-cost, no-load-loss, nonunique solutions ...

more

Redistribution of soil water by a saprotrophic fungus enhances carbon mineralization [Environmental Sciences]

24-Nov-2015 | Alexander Guhr; Werner Borken; Marie Spohn; Egbert Matzner, Proceedings of the National Academy of Sciences current issue, 2015

The desiccation of upper soil horizons is a common phenomenon, leading to a decrease in soil microbial activity and mineralization. Recent studies have shown that fungal communities and fungal-based food webs are less sensitive and better adapted to soil desiccation than bacterial-based food ...

more

Page 1 From 52
Subscribe to e-mail updates relating to your search

You will receive via e-mail the latest search results matching your search criteria. This service is free of charge and can be cancelled at any time.

Your browser is not current. Microsoft Internet Explorer 6.0 does not support some functions on Chemie.DE