Swirling liquids, such as coffee, follow the same principles as transactions with cryptocurrencies such as bitcoin. No, but really.
Posts Tagged ‘fluids’
There’s a weird link between coffee and cryptocurrency



Solar homes could get batteries from this glowing dye
A fluorescent dye called BODIPY could be an ideal material for stockpiling energy in rechargeable, […]
The post Solar homes could get batteries from this glowing dye appeared first on Futurity.



Implications for metal and volatile cycles from the pH of subduction zone fluids
The chemistry of aqueous fluids controls the transport and exchange—the cycles—of metals and volatile elements on Earth. Subduction zones, where oceanic plates sink into the Earth’s interior, are the most important geodynamic setting for this fluid-mediated chemical exchange. Characterizing the ionic speciation and pH of fluids equilibrated with rocks at subduction zone conditions has long been a major challenge in Earth science. Here we report thermodynamic predictions of fluid–rock equilibria that tie together models of the thermal structure, mineralogy and fluid speciation of subduction zones. We find that the pH of fluids in subducted crustal lithologies is confined to a mildly alkaline range, modulated by rock volatile and chlorine contents. Cold subduction typical of the Phanerozoic eon favours the preservation of oxidized carbon in subducting slabs. In contrast, the pH of mantle wedge fluids is very sensitive to minor variations in rock composition. These variations may be caused by intramantle differentiation, or by infiltration of fluids enriched in alkali components extracted from the subducted crust. The sensitivity of pH to soluble elements in low abundance in the host rocks, such as carbon, alkali metals and halogens, illustrates a feedback between the chemistry of the Earth’s atmosphere–ocean system and the speciation of subduction zone fluids via the composition of the seawater-altered oceanic lithosphere. Our findings provide a perspective on the controlling reactions that have coupled metal and volatile cycles in subduction zones for more than 3 billion years7.



Metafluid experiment gives water new consistency
Watching a pan of water as it is agitated up and down brings to mind […]
The post Metafluid experiment gives water new consistency appeared first on Futurity.



How to make asphalt soak up more greenhouse gases
A new form of porous asphalt can sequester 154 percent of its weight in carbon […]
The post How to make asphalt soak up more greenhouse gases appeared first on Futurity.


