A quantum fluid of metallic hydrogen suggested by first-principles calculations

Article Abstract:

Some theoretical models suggests that compressed hydrogen may form an unusual low-temperature, or possibly even a zero-temperature liquid ground state. A report on ab initio calculations that establish the melt line up to 200 GPa is presented. The study concludes that increase in maximally localized Wannier functions (MLWF) spreads when going from the high-pressure solid to the molecular liquid phase suggesting the presence of dynamically induced intermolecular charge transfer.

United States, Hydrogen, Phase transformations (Statistical physics), Phase transitions (Physics), Properties

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Bistability of atmospheric oxygen and the Great Oxidation

Article Abstract:

A study was conducted to show that the origin of oxygenic photosynthesis gave rise to two simultaneously stable steady states for atmospheric oxygen. The results indicate that the existence of oxygenic photosynthesis is not a sufficient condition for either an oxygen-rich atmosphere or the presence of an ozone layer, which has implications for detecting life on other planets using atmospheric analysis and for the evolution of multicellular life.

United Kingdom, Photosynthesis research, Oxidation-reduction reaction, Oxidation-reduction reactions, Chemical properties

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In situ experimental evidence of the fate of a phytodetritus pulse at the abyssal sea floor

Article Abstract:

The authors describe the research of abyssal sea floor's benthic communities. They have investigated the response of this community to phytodetritus pulse, and have reported that as a result the sediment community oxygen consumption has doubled, and that macrofauna are very important for carbon degradation.

Germany, Physiological aspects, Environmental aspects, Biodegradation, Composition, Marine sediments, Ocean bottom, Marine fauna, Marine animals, Submarine geology, Marine geology

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