Hoko process

DSN plants have found Httie appHcation in the United States, but several have been built in Europe. Some older-style HOKO processes, although more capital-intensive and less economical than later DSN processes, continue to operate in the 1990s. 

The HOKO process also makes nitric acid simultaneously at two different concentrations. 

HOKO nitric acid process, 77 185 Holding furnaces, 72 313 Holds (ships), corrosion protection coatings, 7 205... 

Hedges et al. (4) analyzed buried white oak (approximately 25,000 years old) and red alder and Sitka spruce (2500 years old). All of these samples were considered to be in the dynamic process of diagenesis. The oak was excavated in a drill hole, 100 m deep in sediment off the continental slope of Louisiana. The alder and spruce were excavated from a deposit contemporaneous with a 2500-year-old archaeological site on the Hoko River bank on the Olympic Peninsula of Washington State. This wood, even though not artifact material, illustrates the changes that would affect archaeological wood of this age in this environment. 

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