Pu-erh is a rare, fermented tea, and making it from wild tea leaves that grow in an isolated mountain region in China’s southwestern Yunnan province is a lengthy, involved process. First, its leaves are sun-dried on wooden racks to wither and darken. They’re then cooked over hot...
According to Pliny the Younger's account, the eruption lasted18 hours. Pompeii was buried under 14 to 17 feet of ash and pumice, and the nearby seacoast was drastically changed. Herculaneum was buried under more than 60 feet of mud and volcanic material. Was Pompeii a wicked city? Pompeii ...
It was found that iron is present as 6-fold coordinated Fe3+ not part of the zeolite structure. The heterogeneous nature of the sample was revealed as receptacle of different iron-bearing impurities (amorphous iron-rich nanoparticles, micro-particles of iron oxides/hydroxides, and flakes of non...
The preferred feedstock is benzene containing not more than 10 p.p.m. wt. S. The nickel may be supported on the refractory oxides of Group II to V elements or on kieselguhr, pumice or, preferably, sepiolite. The desulphurized feedstock may then be hydrogenated in two stages, both using ...
approximately the ratio 5:1:8 deposited together on pumice, nickel gauze which has been treated as is described in Example 3, Monel metal gauze (66% nickel, 30% copper) and granular Raney alloy (containing 50% nickel, 50% aluminium) which has been treated as is described in Example 9. ...
The preferred feedstock is benzene containing not more than 10 p.p.m. wt. S. The nickel may be supported on the refractory oxides of Group II to V elements or on kieselguhr, pumice or, preferably, sepiolite. The desulphurized feedstock may then be hydrogenated in two stages, both using ...