Collections of the State Historical Society of North Dakota

1926 ◽  
Vol 12 (4) ◽  
pp. 619
Author(s):  
Christopher B. Coleman ◽  
O. G. Libby
Keyword(s):  
North Dakota ◽  
The State ◽  
Historical Society

Perforated Elk Teeth: A Functional and Historical Analysis

1957 ◽  
Vol 22 (4) ◽  
pp. 381-387 ◽  
Author(s):  
A.V Kidder
Keyword(s):  
North Dakota ◽  
Historical Analysis ◽  
Missouri River ◽  
The State ◽  
Historical Society ◽  
Linguistic Groups

In 1955 an archaeological field party from the State Historical Society of North Dakota recovered 2 perforated elk teeth from a village site, 32SI4, on the Missouri River in North Dakota. The excavations at this site were directed by Alan R. Woolworth and the writer. In an attempt to determine the significance of these specimens the writer searched the literature for data on their distribution in archaeological and ethnographic contexts and hints as to their function among socio-linguistic groups.

Collections of the State Historical Society of North Dakota, Vol. V

1925 ◽  
Vol 11 (4) ◽  
pp. 595
Author(s):  
Christopher B. Coleman ◽  
O. G. Libby
Keyword(s):  
North Dakota ◽  
The State ◽  
Historical Society

Sunflower Diseases Remain Rare in California Seed Production Fields Compared to North Dakota

2012 ◽  
Vol 13 (1) ◽  
pp. 1 ◽  
Author(s):  
Thomas J. Gulya ◽  
Suzanne Rooney-Latham ◽  
Jean S. Miller ◽  
Kathleen Kosta ◽  
Colleen Murphy-Vierra ◽  
...  
Keyword(s):  
North Dakota ◽  
Sclerotinia Sclerotiorum ◽  
The State ◽  
California Department ◽  
Diagnostic Laboratory ◽  
Plasmopara Halstedii ◽  
Puccinia Helianthi ◽  
Food And Agriculture ◽  
Phoma Macdonaldii ◽  
Sunflower Production

The majority of United States sunflower production is in seven Midwestern states, but hybrid planting seed is almost exclusively produced in California. Due to the lack of summer rains and furrow irrigation, California-produced seed is relatively disease free and thus it regularly meets phytosanitary restrictions imposed by many countries. For the 15-year period from 1997 to 2011, 7231 seed fields in northern California were inspected and samples processed at the state diagnostic laboratory (California Department of Food and Agriculture). Rust (Puccinia helianthi) was the most prevalent quarantine disease, found in 4.3% of fields. Stalk rot (Sclerotinia sclerotiorum) and downy mildew (Plasmopara halstedii) were the only other quarantine pathogens observed, found in 2.6% and 0.5% of the 7231 fields, respectively. Many sunflower pathogens have never been recorded in California, including Phoma macdonaldii, Phomopsis helianthi, or any virus. North Dakota, the state with the highest US sunflower production, had quarantine pathogens in 88% of 1263 fields surveyed from 1995 to 2011. Phoma macdonaldii, Sclerotinia sclerotiorum, Puccinia helianthi, Phomopsis helianthi, Plasmopara halstedii, and Verticillium dahliae were recorded in 62, 54, 37, 33, 14, and 12%, respectively, of North Dakota fields. Accepted for publication 5 November 2012. Published 14 December 2012.

Testing of a Novel Post Combustion Acid Removal Process for the Direct-Fired, Oxy-Combustion Allam Cycle Power Generation System

2018 ◽  
Vol 140 (8) ◽  
Author(s):  
Xijia Lu ◽  
Scott Martin ◽  
Mike McGroddy ◽  
Mike Swanson ◽  
Josh Stanislowski ◽  
...  
Keyword(s):  
Power Generation ◽  
North Dakota ◽  
Supercritical Co2 ◽  
Operating Cost ◽  
System Optimization ◽  
The State ◽  
Environmental Research ◽  
Operating Pressure ◽  
Removal Process ◽  
Gas Removal

The Allam Cycle is a high-performance oxy-fuel, supercritical CO2 power cycle that offers significant benefits over traditional fossil and hydrocarbon fuel-based power generation systems. A major benefit arises in the elimination of costly precombustion acid gas removal (AGR) for sulfur- (SOx) and nitrogen-based (NOx) impurities by utilizing a novel downstream cleanup process that utilizes NOx first as a gas phase catalyst to effect SOx oxidation, followed by NOx removal. The basic reactions required for this process, which have been well demonstrated in several facilities for the cleanup of exhaust gasses, ultimately convert SOx and NOx species to sulfuric, nitric, and nitrous acids for removal from the supercritical CO2 stream. The process results in simplified and significantly lower cost removal of these species and utilizes conditions inherent to the Allam Cycle that are ideally suited to facilitate this process. 8 Rivers Capital and the Energy & Environmental Research Center (EERC), supported by the state of North Dakota, the U.S. Department of Energy and an Industrial consortium from the State of North Dakota, are currently working together to test and optimize this novel impurity removal process for pressurized, semi-closed supercritical CO2 cycles, such as the Allam Cycle. Both reaction kinetic modeling and on-site testing have been completed. Initial results show that both SOx and NOx can be substantially removed from CO2-rich exhaust gas containing excess oxygen under 20 bar operating pressure utilizing a simple packed spray column. Sensitivity of the removal rate to the concentration of oxygen and NOx was investigated. Follow-on work will focus on system optimization to improve removal efficiency and removal control, to minimize metallurgy and corrosion risks from handling concentrated acids, and to reduce overall capital cost and operating cost of the system.

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