Dakota Group

Fig. 2. Columnar section for the Wattenberg area of the Denver Basin. The primary source rocks are the shales and limestones of the Dakota Group, Benton Group, and Niobrara Formation. The most important hydrocarbon reservoirs are the Dakota J Sandstone and the Hygiene and Terry sandstones of the Middle Pierre Shale. The Lyons Sandstone, Codell Sandstone of the Benton Group, and limestone of the Niobrara Formation also produce hydrocarbons...

Center for Main Group Chemistry, Department of Chemistry, North Dakota State University, Fargo ND, 58105-5516, Sibi plains.nodak.edu, grcook plains.nodak.edu... 

Chen Y Fernando WGD (2006) Prevalence of pathogenicity groups of Leptosphaeria maculans in western Canada and North Dakota, USA. Can J Plant Pathol 28 533-539... 

In 1997, the major manufacturers of chromium compounds were (1) chromic(VI) acid, including chromic(VI) anhydride and chromic(VI) trioxide (total capacity 76,000 metric tons) American Chrome Chemicals Inc., Corpus Christi, Texas Occidental Chemical Corporation Specialty Business Group, Castle Hayne, North Carolina (2) chromium(III) sulfate Blue Grass Chemical Specialties, L.P., New Albany, Indiana Johnson Matthey, Inc., Ward Hill, Massachusetts Wayne Chemical Corp., Amarillo, Texas, Dakota City, Nebraska, and Milwaukee, Wisconsin (3) chromium(III) acetate Blue Grass Chemical Specialties, L.P., McGean-Rohco, Inc., Cleveland, Ohio The Shepard Chemical Company, Cincinnati, Ohio (4) chromium acetylacetonate MacKenzie Corporation, Bush, Louisiana The Shepard Chemical Company, Cincinnati, Ohio (5) chromium boride Cerac Incorporated, Milwaukee,... 

The chloroform extraction of seven coals yielded extracts that gave unique capillary GC profiles. The coal extract profiles fell into four groups 1) BBl, BB2 Texas lignites) and MOC (Australian lignite) 2) B3 (North Dakota lignite) and WYOl (Wyoming, subbitumin-ous) 3) ALBl (Alberta, Canadian subbituminous) and 4) POWl (Ohio, bituminous coal). 

Geology of the Upper Part of the Fort Union Group (Paleocene), Williston Basin, with Reference to Uranium," North Dakota Geol. Survey Report of Investigation No. 58, 1976. 

Terry, D.O. Evans, J.E. (1994) Pedogenesis and paleoclimatic implications of the Chamberlain Pass Formation, Basal White River Group, Badlands of South-Dakota. Palaeogeography, Palaeoclimatology, Palaeoecology 110, 197-215. 

Evans, J.E. (1999) Recognition and implications of Eocene tufas and travertines in the Chadron formation, White River group, Badlands of South Dakota. Sedimentology 46, 771-789. 

Oxazolidinones have proven to be extremely useful auxiliary groups in a variety of synthetic reaction types. Thus, the Evans auxiliaries are useful in the control of configuration in enolate alkylations and concerted cycloadditions, to name a few of the more important applications. Sibi and his collaborators at North Dakota State University have pioneered the use of these auxiliary groups in radical transformations mediated by Lewis acids [21-24]. Consider the general conformational questions that arise in a carboximide, such as 12, derived from an oxazolidinone (Eq. 18). The conformer 12 is disfavored by steric factors while 13 and 14 have similar steric demands. In the absence of any chelating Lewis acid, one expects that 13 would be of lower energy than 14 because of the opposed dipoles of the anti carbonyls in this conformation. 

Bradley, C., P.S. Parks, Y. Chen, andW.G.D. Fernando. 2005. Firstreportof pathogenicity groups 3 and 4 of Leptosphaeria maculans on canola in North Dakota. Plant Disease 89 776. 

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