Towne

Carbon monoxide and excess steam are normally passed over a cobalt catalyst at about 250-300 C resulting in greater than 99% conversion of CO to COj. This conversion reaction is widely used in oil or solid fuel gasification processes for the production of town gas or substitute natural gas. ... 

Term N J, Fairclough P A, Towns-Andrews E, Komanshek B U, Young R J and Ryan A J 1998 Density fluctuations the nucleation event in isotactic polypropylene crystallization Polymer 29 2381- 5... 

Schawlow A L and Townes C H 1958 Infrared and optical lasers Phys. Rev. 112 1940 Maiman T H 1960 Stimulated optical radiation in ruby Nature 187 493 Milonni P W and Eberly J H 1988 Taser (New York Wiley)... 

At the time of Leonhard Ealer (the 18th century, Konigsberg had seven bridges across the Prcgcl river. Some of the townspeople wanted to know if there was a path through the town that allowed one to eross each of the seven bridges exactly once and finish at the starting point. 

Ytterby, a village in Sweden near Vauxholm) Yttria, which is an earth containing yttrium, was discovered by Gadolin in 1794. Ytterby is the site of a quarry which yielded many unusual minerals containing rare earths and other elements. This small town, near Stockholm, bears the honor of giving names to erbium, terbium, and ytterbium as well as yttrium. 

Strontian, town in Scotland) Isolated by Davey by electrolysis in 1808 however, Adair Crawford in 1790 recognized a new mineral (strontianite) as differing from other barium minerals. 

In the fall of 1976 I had a call from a friend, Sid Benson, who, after a decade at the Stanford Research Institute, just returned to the University of Southern California (USC) in Los Angeles. He invited me for a visit, telling me about USC s plans to build up seleeted programs, ineluding chemistry. I visited USC and found it, with its close to downtown urban campus, quite different from the sprawling expanse of the eross-town eampus of UCLA, whieh I had visited on a number of oe-... 

Town, J. L. MacLaren, F. Dewald, H. D. Rotating Disk Voltammetry Experiment, /. Chem. Educ. 1991, 68, 352-354. 

Townes, C. FI. and Schawlow, A. L. (1955) Microwave Spectroscopy, McGraw-FIill, New York. 

Sugden, T. M. and Kenney, C. N. (1965) Microwave Spectroscopy of Gases, Van Nostrand, London. Townes, C. FI. and Schawlow, A. L. (1975) Microwave Spectroscopy, Dover, New York. 

The need for redundancy in the culture system needs to be assessed. Failure of a well pump that brings up water to supply a static pond system may not be a serious problem in countries where new pumps can be purchased in a nearby town. However, it can be disastrous in developing countries where new pumps and pump parts are often not available, but must be ordered from another country. Several weeks or months may pass before the situation can be remedied unless the culturist maintains a selection of spares. 

Low Temperature Carbonization. Low temperature carbonization, when the process does not exceed 700°C, was mainly developed as a process to supply town gas for lighting purposes as well as to provide a smokeless (devolatilized) soHd fuel for domestic consumption (30). However, the process by-products (tars) were also found to be valuable insofar as they served as feedstocks (qv) for an emerging chemical industry and were also converted to gasolines, heating oils, and lubricants (see Gasoline and OTHER motor fuels Lubrication and lubricants) (31). 

C. H. Townes and A. L. Schawlow, Microwave Spectroscopy, McGraw-HiU Book Co., Inc., New York, 1955 corrected reprint, Dover, New York, 1975. 

Until the end of World War II, coal tar was the main source of these aromatic chemicals. However, the enormously increased demands by the rapidly expanding plastics and synthetic-fiber industries have greatly outstripped the potential supply from coal carbonization. This situation was exacerbated by the cessation of the manufacture in Europe of town gas from coal in the eady 1970s, a process carried out preponderantly in the continuous vertical retorts (CVRs), which has led to production from petroleum. Over 90% of the world production of aromatic chemicals in the 1990s is derived from the petrochemical industry, whereas coal tar is chiefly a source of anticorrosion coatings, wood preservatives, feedstocks for carbon-black manufacture, and binders for road surfacings and electrodes. 

Until 1960—1970, in countries where natural gas was not available, large amounts of coal were carbonized for the production of town gas, as well as a grade of coke which, although unsuitable for metallurgical use, was satisfactory as a domestic fuel in closed stoves. The early cast-iron and siUca horizontal retorts used at gasworks were replaced by continuous vertical retorts. These operated at flue temperatures of 1000—1100°C. The volatile products were rapidly swept from the retort by the introduction of steam at 10—20% by weight of the coal carbonized. 

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