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In 1998, carbon tetrachloride was found above the maximum contaminant level (MCL) of 5 {micro}g/L in groundwater from one private livestock well at Sylvan Grove, Kansas, by the Kansas Department of Health and Environment (KDHE). The 1998 KDHE sampling was conducted under the U.S. Department of Agriculture (USDA) private well sampling program. The Commodity Credit Corporation (CCC), a USDA agency, operated a grain storage facility in Sylvan Grove from 1954 to1966. Carbon tetrachloride is the contaminant of primary concern at sites associated with former CCC/USDA grain storage operations. Sylvan Grove is located in western Lincoln County, approximately 60 mi west of Salina (Figure 1.1). To determine whether the former CCC/USDA facility at Sylvan Grove is a potential contaminant source and its possible relationship to the contamination in groundwater, the CCC/USDA has agreed to conduct an investigation, in accordance with the Intergovernmental Agreement between the KDHE and the Farm Service Agency (FSA) of the USDA. This Work Plan presents historical data related to previous investigations, grain storage operations, local private wells and public water supply (PWS) wells, and local geologic and hydrogeologic conditions at Sylvan Grove. The findings from a review of all available documents are discussed in Section 2. On …

Argonne National Laboratory is carrying out a research program to create, prepare, and evaluate catalysts to promote Fischer-Tropsch (FT) chemistry - specifically, the reaction of hydrogen with carbon monoxide to form long-chain hydrocarbons. In addition to needing high activity, it is desirable that the catalysts have high selectivity and stability with respect to both mechanical strength and aging properties. The broad goal is to produce diesel fraction components and avoiding excess yields of both light hydrocarbons and heavy waxes. Originally the goal was to prepare shape-selective catalysts that would limit the formation of long-chain products and yet retain the active metal sites in a protected 'cage.' Such catalysts were prepared with silica-containing fractal cages. The activity was essentially the same as that of catalysts without the cages. We are currently awaiting follow-up experiments to determine the attrition strength of these catalysts. A second experimental stage was undertaken to prepare and evaluate active FT catalysts formed by atomic-layer deposition [ALD] of active components on supported membranes and particulate supports. The concept was that of depositing active metals (i.e. ruthenium, iron or cobalt) upon membranes with well defined flow channels of small diameter and length such that the catalytic activity and product …

Women's and Men's Chorus concert performed at the UNT College of Music Winspear Hall.

Choir concert performed at the UNT College of Music Winspear Hall.

Choir concert performed at the UNT College of Music Winspear Hall.

The subantarctic forests of South America are the world’s southernmost forested ecosystems. The birds have sung in these austral forests for millions of years; the Yahgan and Mapuche peoples have handed down their bird stories from generation to generation for hundreds of years. In Multi-ethnic Bird Guide of the Subantarctic Forests of South America, Ricardo Rozzi and his collaborators present a unique combination of bird guide and cultural ethnography. The bird songs, names and stories recorded on the CDs of the guide book includes entries on fifty bird species of southern Chile and Argentina, among them the Magellanic Woodpecker, Rufous-Legged Owl, Ringed Kingfisher, Buff-Necked Ibis, Giant Hummingbird, and Andean Condor. Each bird is named in Yahgan, Mapudungun, Spanish, English, and scientific nomenclature. As a whole, the recordings of this guide book express the voices of multiple species and indigenous, rural and urban cultures, whose lives are interwoven in the temperate forest region of South America.

Concert presented at Winspear Hall at the Murchison Performing Arts Center.