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Radiation effect on cancer cells by Gold-pHLIP [Applied Biological Sciences]

PNAS Early Edition Articles - Mon, 04/13/2015 - 13:09
Previous research has shown that gold nanoparticles can increase the effectiveness of radiation on cancer cells. Improved radiation effectiveness would allow lower radiation doses given to patients, reducing adverse effects; alternatively, it would provide more cancer killing at current radiation doses. Damage from radiation and gold nanoparticles depends in part...

Areva signs Jaitapur agreements

World Nuclear News - Mon, 04/13/2015 - 09:54
Areva has signed two agreements with Indian companies in preparation for the project to construct six EPR units at Jaitapur in Maharashtra state. The agreements were signed during a visit to Paris by Indian prime minister Narendra Modi.

Regulatory approval for US nuclear spinoff

World Nuclear News - Mon, 04/13/2015 - 09:27
The US Nuclear Regulatory Commission (NRC) has approved the proposed transfer of operating licences for the two Susquehanna nuclear reactors as parent company PPL Corporation prepares to spin off its competitive generation business.

Robot enters Fukushima Daiichi unit 1 containment vessel

World Nuclear News - Mon, 04/13/2015 - 09:21
UPDATED A shape-changing robot began surveying conditions within the primary containment vessel of the damaged unit 1 of the Fukushima Daiichi plant on 10 April. However, the robot stopped working before completing its mission.

Nuclenor confirms soundness of Garoña vessel

World Nuclear News - Mon, 04/13/2015 - 09:19
Inspections of the reactor vessel of Spain's shut down Garoña nuclear power plant show that it is in good condition to operate safely when restarted, plant operator Nuclenor recently reported to the country's regulator.

Chernobyl 1-3 enter decommissioning phase

World Nuclear News - Mon, 04/13/2015 - 08:58
The Chernobyl nuclear power plant in Ukraine has officially entered the decommissioning phase, following approval by the country's nuclear regulator. The first phase of decommissioning is the so-called final shutdown and preservation stage, which is expected to take ten years.

New Video: Dr. Murry Salby – ‘He was fired from his university for pointing out holes in the global warming story’

Climate Depot - Mon, 04/13/2015 - 08:32
It’s a bit technical but very thorough.  Another comment below: Highly informative, if scientifically complex, answers to the question why why and by how much the atmospheric  CO2 (carbon dioxide) budget is increasing were contained in a lecture just given in London by Professor Murry Salby. The lecture has been very well captured on video, [...]

Planetary science: Stormy origins of Titan's dunes

Nature Geoscience Advanced Online - Sun, 04/12/2015 - 23:00

Nature Geoscience. doi:10.1038/ngeo2423

Author: Claire Newman

Titan's equatorial dunes seem to move in the opposite direction to the prevailing easterly winds. Infrequent methane storms at Titan's low latitudes may briefly couple surface winds to fast westerlies above, dominating the net movement of sand.

Strong influence of westerly wind bursts on El Niño diversity

Nature Geoscience Advanced Online - Sun, 04/12/2015 - 23:00

Nature Geoscience. doi:10.1038/ngeo2399

Authors: Dake Chen, Tao Lian, Congbin Fu, Mark A. Cane, Youmin Tang, Raghu Murtugudde, Xunshu Song, Qiaoyan Wu & Lei Zhou

Methane storms as a driver of Titan’s dune orientation

Nature Geoscience Advanced Online - Sun, 04/12/2015 - 23:00

Nature Geoscience. doi:10.1038/ngeo2406

Authors: Benjamin Charnay, Erika Barth, Scot Rafkin, Clément Narteau, Sébastien Lebonnois, Sébastien Rodriguez, Sylvain Courrech du Pont & Antoine Lucas

The equatorial regions of Saturn’s moon Titan are covered by linear dunes that propagate eastwards. Global climate models (GCMs), however, predict westward mean surface winds at low latitudes on Titan, similar to the trade winds on Earth. This apparent contradiction has been attributed to Saturn’s gravitational tides, large-scale topography and wind statistics, but none of these hypotheses fully explains the global eastward propagation of dunes in Titan’s equatorial band. However, above altitudes of about 5 km, Titan’s atmosphere is in eastward super-rotation, suggesting that this momentum may be delivered to the surface. Here we assess the influence of equatorial tropical methane storms—which develop at high altitudes during the equinox—on Titan’s dune orientation, using mesoscale simulations of convective methane clouds with a GCM wind profile that includes super-rotation. We find that these storms produce fast eastward gust fronts above the surface that exceed the normal westward surface winds. These episodic gusts generated by tropical storms are expected to dominate aeolian transport, leading to eastward propagation of dunes. We therefore suggest a coupling between super-rotation, tropical methane storms and dune formation on Titan. This framework, applied to GCM predictions and analogies to some terrestrial dune fields, explains the linear shape, eastward propagation and poleward divergence of Titan’s dunes, and implies an equatorial origin of dune sand.

Transient liquid water and water activity at Gale crater on Mars

Nature Geoscience Advanced Online - Sun, 04/12/2015 - 23:00

Nature Geoscience. doi:10.1038/ngeo2412

Authors: F. Javier Martín-Torres, María-Paz Zorzano, Patricia Valentín-Serrano, Ari-Matti Harri, Maria Genzer, Osku Kemppinen, Edgard G. Rivera-Valentin, Insoo Jun, James Wray, Morten Bo Madsen, Walter Goetz, Alfred S. McEwen, Craig Hardgrove, Nilton Renno, Vincent F. Chevrier, Michael Mischna, Rafael Navarro-González, Jesús Martínez-Frías, Pamela Conrad, Tim McConnochie, Charles Cockell, Gilles Berger, Ashwin R. Vasavada, Dawn Sumner & David Vaniman

Water is a requirement for life as we know it. Indirect evidence of transient liquid water has been observed from orbiter on equatorial Mars, in contrast with expectations from large-scale climate models. The presence of perchlorate salts, which have been detected at Gale crater on equatorial Mars by the Curiosity rover, lowers the freezing temperature of water. Moreover, perchlorates can form stable hydrated compounds and liquid solutions by absorbing atmospheric water vapour through deliquescence. Here we analyse relative humidity, air temperature and ground temperature data from the Curiosity rover at Gale crater and find that the observations support the formation of night-time transient liquid brines in the uppermost 5 cm of the subsurface that then evaporate after sunrise. We also find that changes in the hydration state of salts within the uppermost 15 cm of the subsurface, as measured by Curiosity, are consistent with an active exchange of water at the atmosphere–soil interface. However, the water activity and temperature are probably too low to support terrestrial organisms. Perchlorates are widespread on the surface of Mars and we expect that liquid brines are abundant beyond equatorial regions where atmospheric humidity is higher and temperatures are lower.

Hillary Clinton tells thrilling tale of Obama/Clinton planet-saving heroism at Copenhagen 2009

Climate Depot - Sat, 04/11/2015 - 22:23
Hillary Clinton tells thrilling tale of Obama/Clinton planet-saving heroism at Copenhagen 2009 http://tomnelson.blogspot.com/2015/04/hillary-clinton-tells-thrilling-tale-of.html From this December 2014 LCV speech (17 min mark).President Obama and I went to the global climate conference in Copenhagen in 2009. We ran into a solid wall of opposition from countries like China, India, and Brazil. The president and I literally had [...]

‘Three-Year Mean Antarctic Sea Ice Highest On Satellite Record!’

Climate Depot - Sat, 04/11/2015 - 08:00
Clear And Gathering Evidence Of Cooling: Three-Year Mean Antarctic Sea Ice Highest On Satellite Record! http://notrickszone.com/2015/04/11/clear-and-gathering-evidence-of-cooling-three-year-mean-antarctic-sea-ice-highest-on-satellite-record/ Now that it’s spring, it’s as good a time as any to look at polar sea ice. Climate scientists have told us time and again that global warming would first be been at the Earth’s poles. Well, iff that [...]

Driessen: ‘The Obama Climate Monarchy’

Climate Depot - Sat, 04/11/2015 - 06:06

Two new studies show that global warming is not behind California drought

Climate Depot - Sat, 04/11/2015 - 06:02
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