Silver—corn

Scientists from Politecnico di Milano and Ineos Vinyls UK developed a tubular fixed-bed reactor comprising a metallic monolith [30]. The walls were coated with catalytically active material and the monolith pieces were loaded lengthwise. Corning, the world leader in ceramic structured supports, developed metallic supports with straight channels, zig-zag channels, and wall-flow channels. They were produced by extrusion of metal powders, for example, copper, fin, zinc, aluminum, iron, silver, nickel, and mixtures and alloys [31]. An alternative method is extrusion of softened bulk metal feed, for example, aluminum, copper, and their alloys. The metal surface can be covered with carbon, carbides, and alumina, using a CVD technique [32]. For metal monoliths, it is to be expected that the main resistance lies at the interface between reactor wall and monolith. Corning... 

If a man can bring to London an ounce of silver out of the Earth in Peru, in the same time that he can produce a bushel of Corn, then the one is the natural price of the other now, if by reason of new or more easie mines a man can procure two ounces of silver as easily as he formerly did one, the corn will be as cheap at ten shillings the bushel as it was before at five shillings, caeteris paribus, (from A Treatise of Taxes and Contributions, cited in Marx i86j, gr)... 

The research journals are the primary place where research results are first published. The prices of compounds change rapidly, and are to be found in journals instead of books. The New York Times finance page lists a number of commonly traded metals (aluminum, antimony, copper, gold, iron, lead, mercury, platinum, silver, zinc), food (corn, soya, wheat, rice, sugar), fuels (fuel oil, gasoline, natural gas), and textile (cotton, wool). The Chemical Market Report is a weekly journal that lists the prices of many chemical substances in a supplement, which depend strongly on purity and intended use. 

In A. Rosenheim and J. Pinsker s modification of J. Corne s process, 100 grms. of copper turnings are added to a mixture of 100 c.c. of water and 200 c.c. of nitric acid (sp. gr. 14) in a 3-litre flask. When the intensity of the reaction has subsided, yellow phosphorus is gradually added while the temp, is maintained between 50° and 70°. When the clear colourless liquid is decanted off, the copper is all precipitated as copper phosphide and spongy copper, and half is neutralized with sodium carbonate, and mixed with the other half. Crystals of the sodium salt, Na2H2P20e.4H20, separate after a time. The yield with copper nitrate is 10 per cent, of the theoretical, but is not so good if silver nitrate is used in place of copper. 

Notice that, except for nickel, the metals used to make corns have negative oxidation potentials. In other words, unlike most metals, platinum, gold, silver, mercury, and copper d< not oxidize (or dissolve) spontaneously under standard conditions in the piesence of aqueous H ... 

FIGURE 128. Applications for lead ( Saturne ), tin ( Jupiter ), silver ( Lune — moon), and gold ( Soleil —sun). (From Barlet s 1657 Le Vray Methodique Corns de la Physique.)... 

Today, coffee is along with crude oil, natural gas, copper, silver, gold, sugar, cotton, corn, and wheat one of the world s largest trading commodities - worth more than 12 billion dollars in trade every year - and the 2nd most consumed beverage worldwide after water. Most of the world s coffee crop is produced in Southern and Central America, Asia and Africa. The United States is the biggest importer, while Finland is the nation that consumes the most per capita. 

---