Methane is a naturally occurring gas and in the atmosphere is the product of a combination of natural and human-controlled processes such as swamps, landfills, animal digestion, and fossil fuels.1,2It is the main component of natural gas used for heating and energy worldwide and is a greenho...
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As the space station travels at a speed of about 17,500 miles per hour, we get to see the sunrise every 90 minutes. In these precious moments, all the challenges of life in space seem worth it. 【课本原题】1. Read the lecture transcript and complete the chart below. Life on a ...
In 2010 the intention was to revisit the site first discovered in the 1970s. It stood out as a small mound on the otherwise rolling landscape of arctic tundra. From this site another mound could be seen in the distance, which raised the tantalizing possibility of a second site. Some hard...
IR and UV/vis spectroscopic measurements have been used to chart the reactions set in train by irradiating methane-doped argon matrices containing gallium or indium atoms, first with light having λ = 200−400 nm, and subsequently with broad-band UV−visible light. Assignments of the IR abso...
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The concentration of methane in the atmosphere has doubled within the last 200 years and, currently, 20% of all global emissions (human-created and natural) is methane [3]. As the world focuses on the reduction in greenhouse gas emissions, the implementation of hydrogen fuel has become a ...
Methane hydrate stability chart: This phase diagram shows water depth (pressure) on the vertical axis and temperature on the horizontal axis. The dashed lines separate stability fields of water, water ice, gas and gas hydrate. The line labeled "hydrate to gas transition" is significant. ...
Our explorations with the bis(iminophosphorano)methane ligands thus created a system of constrained geometry, pincer, bis-chelate, complexes (Chart 14.1, A) to expand the substantial collection of carbon bound pincer systems (Chart 14.1) which had been developed by others. Recent reports have prov...
In particular, three leading research questions warrant attention: how did the subglacial footprint of the former ice-sheet affect the GHSZ? How could this GHSZ govern methane storage and release across the glaciated margin? How could post-glacial ice-sheet retreat impact on this former ...