650 research outputs found

    Report on a Live Flounder Holding Project on the Eastern Shore of Virginia

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    The goals and objectives of this Grant Program were to ascertain if live fluke could be held in a low tech flow through seaside tank system and sold later when market prices were higher? We have also tried to determine how wild fluke will be affected by changes in temperature and climate and whether they can be trained to feed on raw fish or other feed? We sought to determine if weak and stressed fish can be identified and removed from the tank prior to affecting healthy fish in the tank? And if not, can any resulting disease in the fish be controlled in the tank? Over the course of the Grant Program, we have collected data in order to show whether our goals and objectives were attained. We built a facility, constructed a circular tank, installed pumps and aerators, employed various methodologies relative to fish collection, transportation, and feeding, handled problems as they arose, and ultimately marketed our product in a timely manner and at a price sufficient to determine the project worthwhile. Ultimately we determined that fluke can be profitably held in a tank for sale in the live market at higher margins than can normally be obtained in the iced market

    Korea Electric Power Corporation (KEPCO)

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    노트 : Prepared for US-Asia Environmental Partnershi

    Many Rivers to Cross: Evaluating the Benefits and Limitations of Strategic Environmental Assessment for the Koshi River Basin

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    This paper assesses the value of using Strategic Environmental Assessment (SEA) to account for the spatially and temporally diverse and diffuse impacts of hydropower development in South Asia’s Koshi basin. A policy and practice review and key stakeholder interviews identified opportunities for SEA to improve existing planning procedures, but also barriers to effective adoption. Whilst stakeholders are interested in employing SEA to evaluate cumulative impacts, institutional blockages and an economic development imperative for power generation leave little space for consideration of alternative scenarios as part of SEA. The analysis is conducted through the formulation and application of a conceptual framework for SEA best practice which is then used to identify priority next-steps for SEA in the region

    Hydrolysis of γ -glutamyl linkages by Fusobacterium nucleatum

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    The cell extracts of two human oral strains (FN2 and FN3) of Fusobacterium nucleatum displayed exceptionally high γ -glutamylpeptidase activity as determined with N-γ - l -glutamyl-2-naphthylamine as substrate. This activity was so dominant that the hydrolysis of other N -aminoacyl-2-naphthylamines progressed at a rate <10% of the former. Two major enzymes (I and II) were partially purified from FN2. I had a molecular weight of 115,000 and did not hydrolyze γ -glutamylcysteinylglycine (glutathione). II had a molecular weight of 70,000 and rapidly liberated only glutamic acid from glutathione. Strain FN3 contained several enzymes hydrolyzing γ -glu-2NA. Direct anion exchange chromatography of FN3 cell extracts separated one enzyme that liberated both glutamic acid and glycine from glutathione, one that was inactive against glutathione (but hydrolyzed γ -glu-2NA), and one that liberated only glutamic acid. Although γ -glu-2NA was a good synthetic substrate, glutathione was hydrolyzed at least 500 times faster by an enzyme present in both strains. These results indicate that the presence of γ -glutamylpeptidase activity is very characteristic of these F. nucleatum strains.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/41334/1/284_2005_Article_BF02094016.pd

    Potently neutralizing and protective anti-human metapneumovirus antibodies target diverse sites on the fusion glycoprotein

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    Human metapneumovirus (hMPV) is a leading cause of acute lower respiratory tract infections in high-risk populations, yet there are no vaccines or anti-viral therapies approved for the prevention or treatment of hMPV-associated disease. Here, we used a high-throughput single-cell technology to interrogate memory B cell responses to the hMPV fusion (F) glycoprotein in young adult and elderly donors. Across all donors, the neutralizing antibody response was primarily directed to epitopes expressed on both pre- and post-fusion F conformations. However, we identified rare, highly potent broadly neutralizing antibodies that recognize pre-fusion-specific epitopes and structurally characterized an antibody that targets a site of vulnerability at the pre-fusion F trimer apex. Additionally, monotherapy with neutralizing antibodies targeting three distinct antigenic sites provided robust protection against lower respiratory tract infection in a small animal model. This study provides promising monoclonal antibody candidates for passive immunoprophylaxis and informs the rational design of hMPV vaccine immunogens.We acknowledge the Immune Monitoring and Flow Cytometry Resource (IMFCSR) at the Norris Cotton Cancer Center at Dartmouth supported by NCI Cancer Center Support Grant 5P30CA023108-41. This work was funded in part by Welch Foundation grant number F-0003-19620604.S

    Variation in abundances of common bird species associated with roads

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    1. The global road network, currently over 45 million lane-km in length, is expected to reach 70 million lane-km by 2050, while the number of vehicles utilising it is expected to double. Roads have been shown to affect a range of wildlife, including birds, but most studies have been relatively small scale. 2. We use data from across Great Britain to analyse the relationships between roads and the spatial distributions of bird populations. We model counts of 51 common and widespread species from the U.K. Breeding Bird Survey in relation to road exposure, which we calculated for each count site using the density, distance and traffic volume of all roads within a 5 km radius. In these models, we incorporate other factors known to affect bird populations, including agricultural intensity, human population, habitat and climate. Importantly, we also account for differences in detectability of birds near to roads. 3. The abundances of 30 species were strongly significantly related to exposure to either major or minor roads. Species were generally in higher abundances with increasing exposure to minor roads (20/28). In contrast, most significant associations between major road exposure and bird abundance were negative (7/8). 4. For species with significant effects of road exposure, we assessed how estimated abundance changed across the central 50% of road exposure experienced for each species. The mean decrease in abundance was 19% and the mean increase was 47%. These changes in bird abundance were up to half as large as those associated with increasing agricultural intensity, a factor often cited as a major cause of bird population changes. 5. Synthesis and applications. Our research shows many species to vary in abundance with increasing road exposure. This suggests that roads may modify bird populations on a national scale and that their potential as drivers of biodiversity change should not be overlooked. Our work highlights the need for appropriate mitigation of roads, particularly in areas important for avian biodiversity. This could include efforts to reduce impacts of road noise and/or collisions, such as reduced speed limits or quieter road surfaces in sensitive areas

    Wind-driven ventilation improvement with plan typology alteration: a CFD case study of traditional Turkish architecture

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    Aligned with achieving the goal of net-zero buildings, the implementation of energy-saving techniques in minimizing energy demands is proving more vital than at any time. As practical and economic options, passive strategies in ventilation developed over thousands of years have shown great potential for the reduction of residential energy demands, which are often underestimated in modern building’s construction. In particular, as a cost-effective passive strategy, wind-driven ventilation via windows has huge potential in the enhancement of the indoor air quality (IAQ) of buildings while simultaneously reducing their cooling load. This study aims to investigate the functionality and applicability of a common historical Turkish architectural element called “Cumba” to improve the wind-driven ventilation in modern buildings. A case study building with an archetypal plan and parameters was defined as a result of a survey over 111 existing traditional samples across Turkey. Buildings with and without Cumba were compared in different scenarios by the development of a validated CFD microclimate model. The results of simulations clearly demonstrate that Cumba can enhance the room’s ventilation rate by more than two times while harvesting wind from different directions. It was also found that a flexible window opening strategy can help to increase the mean ventilation rate by 276%. Moreover, the room’s mean air velocity and ventilation rate could be adjusted to a broad range of values with the existence of Cumba. Thus, this study presents important findings about the importance of plan typology in the effectiveness of wind-driven ventilation strategies in modern dwellings
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