1,053 research outputs found
[Photograph 2012.201.B0146.0005]
No full textPhotograph used for a story in the Daily Oklahoman newspaper. Caption: "Gov. David Walters, left, base closure commission Chairman Jim Courter, at top of stairs, and commission member Harry C. McPherson, bottom right, tour a B-52 aircraft as part of their inspection of Tinker Air Base Saturday.
Microbial enrichment culture responsible for the complete oxidative biodegradation of 3‑Amino-1,2,4-triazol-5-one (ATO), the reduced daughter product of the insensitive munitions compound 3‑Nitro-1,2,4-triazol-5-one (NTO)
No full text3-Nitro-1,2,4-triazol-5-one (NTO) is one of the main ingredients of many insensitive munitions, which are being used as replacements for conventional explosives. As its use becomes widespread, more research is needed to assess its environmental fate. Previous studies have shown that NTO is biologically reduced to 3-amino-1,2,4-triazol-5-one (ATO). However, the final degradation products of ATO are still unknown. We have studied the aerobic degradation of ATO by enrichment cultures derived from the soil. After multiple transfers, ATO degradation was monitored in closed bottles through measurements of inorganic carbon and nitrogen species. The results indicate that the members of the enrichment culture utilize ATO as the sole source of carbon and nitrogen. As ATO was mineralized to CO₂, N₂, and NH₄⁺, microbial growth was observed in the culture. Co-substrates addition did not increase the ATO degradation rate. Quantitative polymerase chain reaction analysis revealed that the organisms that enriched using ATO as carbon and nitrogen source were Terrimonas spp., Ramlibacter-related spp., Mesorhizobium spp., Hydrogenophaga spp., Ralstonia spp., Pseudomonas spp., Ectothiorhodospiraceae, and Sphingopyxis. This is the first study to report the complete mineralization of ATO by soil microorganisms, expanding our understanding of natural attenuation and bioremediation of the explosive NTO.Journal ArticleFinal article publishe
Sawteeth Range
No full textThis photograph of the Sawtooth Range was taken west of Dry Sluice Gap by Carlos C. Campbell (1892-1978), a founding member of the Great Smoky Mountains Conservation Association and author of “Birth of a National Park,” published in 1960. This photograph, with others in this series, are included in the records of the Smoky Mountains Hiking Club, formed after a group of outdoor enthusiasts hiked up to Mount LeConte in October 1924. The back of the picture is stamped “Jim Thompson Co.,” indicating it was probably printed by hiking club member James E. (Jim) Thompson (1880-1976)
West Peak of Mount LeConte
No full textThis photograph of the west peak of Mount LeConte is included in the records of the Smoky Mountains Hiking Club. The photograph was made by Carlos C. Campbell (1892-1978), a founding member of the Great Smoky Mountains Conservation Association and author of “Birth of a National Park.” The back of the picture is stamped “Jim Thompson Co.,” indicating it was probably printed by hiking club member James E. (Jim) Thompson (1880-1976), a professional photographer who played a major role in promoting a national park in the Southern Appalachians. The club was formed after a group of outdoor enthusiasts hiked up to Mount LeConte in October 1924
Mount Guyot and Mount Chapman
No full textThis photograph of Mt. Guyot and Mt. Chapman was made by Carlos C. Campbell (1892-1978), a founding member of the Great Smoky Mountains Conservation Association and author of “Birth of a National Park,” published in 1960. This photograph, with others in this series, are included in the records of the Smoky Mountains Hiking Club, formed after a group of outdoor enthusiasts hiked up to Mount LeConte in October 1924. The back of the picture is stamped “Jim Thompson Co.,” indicating it was probably printed by hiking club member James E. (Jim) Thompson (1880-1976)
Jim Thompson and Jas S. Hall hiking the Appalachian Trail
No full textThis photograph of Jim Thompson and Jas S. Hall hiking the Appalachian Trail is in the collection of the Smoky Mountains Hiking Club. The club was formed after a group of outdoor enthusiasts hiked up to Mount LeConte in October 1924. The photograph was made by Carlos C. Campbell (1892-1978), a founding member of the Great Smoky Mountains Conservation Association and author of “Birth of a National Park.” Club member James E. (Jim) Thompson (1880-1976) was a professional photographer who played a major role in promoting a national park in the Southern Appalachians
Hughes Ridge
No full textThis photograph, looking toward Hughes Ridge from the lead which extends from Tyre Top down to Wesser Station, is included in the records of the Smoky Mountains Hiking Club. The picture was taken by Carlos C. Campbell (1892-1978), a founding member of the Great Smoky Mountains Conservation Association and author of “Birth of a National Park.” The back of the picture is stamped “Jim Thompson Co.,” indicating it was probably printed by hiking club member James E. (Jim) Thompson (1880-1976), a professional photographer who played a major role in promoting a national park in the Southern Appalachians. The Smoky Mountains Hiking Club was formed after a group of outdoor enthusiasts hiked up to Mount LeConte in October 1924
Analyzing bond characteristics between composites and quasi-brittle substrates in the repair of bridges and other concrete structures
No full textDuring the last two decades, externally bonded fiber-reinforced polymer (FRP) composites have been widely used for strengthening, repairing, and rehabilitating reinforced concrete (RC) structural members. The bond characteristics contribute to the effectiveness of the stress transfer achieved between the FRP composite and the concrete substrate. Debonding of the FRP composite reinforcement is the most critical concern in this type of application. Under monotonic and fatigue-loading conditions, FRP-concrete shear debonding has been idealized as a Mode-II fracture problem along the bi-material interface. A cohesive material law is used to describe the interfacial stress transfer at the macroscopic level. The area under the entire curve represents the fracture energy, and is related to the load-carrying capacity of the interface. In this chapter, previous experimental results published by the author are discussed to show how the fracture energy can be considered a true fracture parameter. The results are instrumental in discussing the strain limits provided in international codes and guidelines. Future research needed and newly developed composites are introduced at the end of the chapter
Uniformed crew at Station No. 5, Anaheim & Newport
No full textPictured, standing (L to R): A. Lent, F. Kneisel, Capt. G. Croy, R. Harding, G. Carver, P. Gorham, Carl Garlick, Jim Foster; kneeling (L to R): Lt. Paul Hoy, C. Lathrop, W. McGree, K. Walters, W. Head. Brick station demolished in 1933 earthquake, later rebuilt on same site.Pictured, standing (L to R): A. Lent, F. Kneisel, Capt. G. Croy, R. Harding, G. Carver, P. Gorham, Carl Garlick, Jim Foster; kneeling (L to R): Lt. Paul Hoy, C. Lathrop, W. McGree, K. Walters, W. Hea
Carlos C. Campbell card
No full textCarlos C. Campbell (1892-1978) was a founding member of the Great Smoky Mountains Conservation Association. Formed in 1923, the association promoted the establishment of a national park in the Great Smoky Mountains. The archival material in this series is part of the records of the Smoky Mountains Hiking Club, formed after a group of outdoor enthusiasts hiked up to Mount LeConte in October 1924. Campbell was also a member of the club and is author of “Birth of a National Park,” published in 1960
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