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Zhang C, McIntosh KD, Sienkiewicz N, Stelzer EA, Graham JL, Lu J. Using cyanobacteria and other phytoplankton to assess trophic conditions: A qPCR-based, multi-year study in twelve large rivers across the United States. Water Res 2023; 235:119679. [PMID: 37011576 PMCID: PMC10123349 DOI: 10.1016/j.watres.2023.119679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 01/24/2023] [Accepted: 01/27/2023] [Indexed: 06/19/2023]
Abstract
Phytoplankton is the essential primary producer in fresh surface water ecosystems. However, excessive phytoplankton growth due to eutrophication significantly threatens ecologic, economic, and public health. Therefore, phytoplankton identification and quantification are essential to understanding the productivity and health of freshwater ecosystems as well as the impacts of phytoplankton overgrowth (such as Cyanobacterial blooms) on public health. Microscopy is the gold standard for phytoplankton assessment but is time-consuming, has low throughput, and requires rich experience in phytoplankton morphology. Quantitative polymerase chain reaction (qPCR) is accurate and straightforward with high throughput. In addition, qPCR does not require expertise in phytoplankton morphology. Therefore, qPCR can be a useful alternative for molecular identification and enumeration of phytoplankton. Nonetheless, a comprehensive study is missing which evaluates and compares the feasibility of using qPCR and microscopy to assess phytoplankton in fresh water. This study 1) compared the performance of qPCR and microscopy in identifying and quantifying phytoplankton and 2) evaluated qPCR as a molecular tool to assess phytoplankton and indicate eutrophication. We assessed phytoplankton using both qPCR and microscopy in twelve large freshwater rivers across the United States from early summer to late fall in 2017, 2018, and 2019. qPCR- and microscope-based phytoplankton abundance had a significant positive linear correlation (adjusted R2 = 0.836, p-value < 0.001). Phytoplankton abundance had limited temporal variation within each sampling season and over the three years studied. The sampling sites in the midcontinent rivers had higher phytoplankton abundance than those in the eastern and western rivers. For instance, the concentration (geometric mean) of Bacillariophyta, Cyanobacteria, Chlorophyta, and Dinoflagellates at the sampling sites in the midcontinent rivers was approximately three times that at the sampling sites in the western rivers and approximately 18 times that at the sampling sites in the eastern rivers. Welch's analysis of variance indicates that phytoplankton abundance at the sampling sites in the midcontinent rivers was significantly higher than that at the sampling sites in the eastern rivers (p-value = 0.013) but was comparable to that at the sampling sites in the western rivers (p-value = 0.095). The higher phytoplankton abundance at the sampling sites in the midcontinent rivers was presumably because these rivers were more eutrophic. Indeed, low phytoplankton abundance occurred in oligotrophic or low trophic sites, whereas eutrophic sites had greater phytoplankton abundance. This study demonstrates that qPCR-based phytoplankton abundance can be a useful numerical indicator of the trophic conditions and water quality in freshwater rivers.
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Affiliation(s)
- Chiqian Zhang
- Department of Civil and Environmental Engineering, College of Sciences and Engineering, Southern University and A&M College, Baton Rouge, LA 70813, United States
| | - Kyle D McIntosh
- Oak Ridge Institute for Science and Education at the United States Environmental Protection Agency's Office of Research and Development, Oak Ridge, TN 37830, United States
| | - Nathan Sienkiewicz
- Office of Research and Development, United States Environmental Protection Agency, Cincinnati, OH 45268, United States
| | - Erin A Stelzer
- U.S. Geological Survey, Columbus, OH 43229, United States
| | | | - Jingrang Lu
- Office of Research and Development, United States Environmental Protection Agency, Cincinnati, OH 45268, United States.
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Linz DM, Sienkiewicz N, Struewing I, Stelzer EA, Graham JL, Lu J. Metagenomic mapping of cyanobacteria and potential cyanotoxin producing taxa in large rivers of the United States. Sci Rep 2023; 13:2806. [PMID: 36797305 PMCID: PMC9935515 DOI: 10.1038/s41598-023-29037-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 01/30/2023] [Indexed: 02/18/2023] Open
Abstract
Cyanobacteria and cyanotoxin producing cyanobacterial blooms are a trending focus of current research. Many studies focus on bloom events in lentic environments such as lakes or ponds. Comparatively few studies have explored lotic environments and fewer still have examined the cyanobacterial communities and potential cyanotoxin producers during ambient, non-bloom conditions. Here we used a metagenomics-based approach to profile non-bloom microbial communities and cyanobacteria in 12 major U.S. rivers at multiple time points during the summer months of 2019. Our data show that U.S. rivers possess microbial communities that are taxonomically rich, yet largely consistent across geographic location and time. Within these communities, cyanobacteria often comprise significant portions and frequently include multiple species with known cyanotoxin producing strains. We further characterized these potential cyanotoxin producing taxa by deep sequencing amplicons of the microcystin E (mcyE) gene. We found that rivers containing the highest levels of potential cyanotoxin producing cyanobacteria consistently possess taxa with the genetic potential for cyanotoxin production and that, among these taxa, the predominant genus of origin for the mcyE gene is Microcystis. Combined, these data provide a unique perspective on cyanobacteria and potential cyanotoxin producing taxa that exist in large rivers across the U.S. and can be used to better understand the ambient conditions that may precede bloom events in lotic freshwater ecosystems.
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Affiliation(s)
- David M. Linz
- grid.418698.a0000 0001 2146 2763Office of Research and Development, U.S. Environmental Protection Agency, Cincinnati, OH USA
| | - Nathan Sienkiewicz
- grid.418698.a0000 0001 2146 2763Office of Research and Development, U.S. Environmental Protection Agency, Cincinnati, OH USA
| | - Ian Struewing
- grid.418698.a0000 0001 2146 2763Office of Research and Development, U.S. Environmental Protection Agency, Cincinnati, OH USA
| | - Erin A. Stelzer
- grid.2865.90000000121546924U.S. Geological Survey, Columbus, OH USA
| | | | - Jingrang Lu
- Office of Research and Development, U.S. Environmental Protection Agency, Cincinnati, OH, USA.
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Taylor PH, Yamada T, Striebich RC, Graham JL, Giraud RJ. Corrigendum to "Investigation of waste incineration of fluorotelomer-based polymers as a potential source of PFOA in the environment" [Chemosphere 110 (2014) 17-22]. Chemosphere 2022; 298:134601. [PMID: 35459458 DOI: 10.1016/j.chemosphere.2022.134601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- P H Taylor
- University of Dayton Research Institute, Environmental Engineering Group, 300 College Park, Dayton, OH, 45469, United States.
| | - T Yamada
- University of Dayton Research Institute, Environmental Engineering Group, 300 College Park, Dayton, OH, 45469, United States
| | - R C Striebich
- University of Dayton Research Institute, Environmental Engineering Group, 300 College Park, Dayton, OH, 45469, United States
| | - J L Graham
- University of Dayton Research Institute, Environmental Engineering Group, 300 College Park, Dayton, OH, 45469, United States
| | - R J Giraud
- E.I. du Pont de Nemours and Company, Inc., 1007 Market Street, Wilmington, DE, 19898, United States
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Kakouei K, Kraemer BM, Anneville O, Carvalho L, Feuchtmayr H, Graham JL, Higgins S, Pomati F, Rudstam LG, Stockwell JD, Thackeray SJ, Vanni MJ, Adrian R. Phytoplankton and cyanobacteria abundances in mid-21st century lakes depend strongly on future land use and climate projections. Glob Chang Biol 2021; 27:6409-6422. [PMID: 34465002 DOI: 10.1111/gcb.15866] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Accepted: 08/11/2021] [Indexed: 06/13/2023]
Abstract
Land use and climate change are anticipated to affect phytoplankton of lakes worldwide. The effects will depend on the magnitude of projected land use and climate changes and lake sensitivity to these factors. We used random forests fit with long-term (1971-2016) phytoplankton and cyanobacteria abundance time series, climate observations (1971-2016), and upstream catchment land use (global Clumondo models for the year 2000) data from 14 European and 15 North American lakes basins. We projected future phytoplankton and cyanobacteria abundance in the 29 focal lake basins and 1567 lakes across focal regions based on three land use (sustainability, middle of the road, and regional rivalry) and two climate (RCP 2.6 and 8.5) scenarios to mid-21st century. On average, lakes are expected to have higher phytoplankton and cyanobacteria due to increases in both urban land use and temperature, and decreases in forest habitat. However, the relative importance of land use and climate effects varied substantially among regions and lakes. Accounting for land use and climate changes in a combined way based on extensive data allowed us to identify urbanization as the major driver of phytoplankton development in lakes located in urban areas, and climate as major driver in lakes located in remote areas where past and future land use changes were minimal. For approximately one-third of the studied lakes, both drivers were relatively important. The results of this large scale study suggest the best approaches for mitigating the effects of human activity on lake phytoplankton and cyanobacteria will depend strongly on lake sensitivity to long-term change and the magnitude of projected land use and climate changes at a given location. Our quantitative analyses suggest local management measures should focus on retaining nutrients in urban landscapes to prevent nutrient pollution from exacerbating ongoing changes to lake ecosystems from climate change.
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Affiliation(s)
- Karan Kakouei
- Department of Ecosystem Research, Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany
| | - Benjamin M Kraemer
- Department of Ecosystem Research, Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany
| | - Orlane Anneville
- Food and Environment (INRAE), UMR CARRTEL, University of Savoie Mont-Blanc, French National Research Institute for Agriculture, Thonon-les-Bains, France
| | - Laurence Carvalho
- UK Centre for Ecology & Hydrology, Lancaster University, Lancaster, UK
| | - Heidrun Feuchtmayr
- Lake Ecosystems Group, UK Centre for Ecology & Hydrology, Bailrigg, Lancaster, UK
| | | | - Scott Higgins
- IISD Experimental Lakes Area, Winnipeg, Manitoba, Canada
| | - Francesco Pomati
- Eawag, Department of Aquatic Ecology, Swiss Federal Institute of Water Science and Technology, Dübendorf, Switzerland
- Department of Integrative Biology (IBZ), ETH-Zürich, Zürich, Switzerland
| | - Lars G Rudstam
- Department of Natural Resources and the Environment, Cornell University, Ithaca, New York, USA
| | - Jason D Stockwell
- Rubenstein Ecosystem Science Laboratory, University of Vermont, Burlington, Vermont, USA
| | - Stephen J Thackeray
- Lake Ecosystems Group, UK Centre for Ecology & Hydrology, Bailrigg, Lancaster, UK
| | | | - Rita Adrian
- Department of Ecosystem Research, Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Berlin, Germany
- Department of Biology, Freie Universität Berlin, Berlin, Germany
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Huo M, Graham JL, Fingerman K. DOES GENDER MATTER? EMPATHY AND OLDER ADULTS’ HELPING BEHAVIORS IN A DAILY CONTEXT. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- M Huo
- Human Development and Family Science, University of Texas-Austin, Austin, Texas, United States
| | - J L Graham
- Human Development and Family Sciences, University of Texas-Austin, Austin, TX, USA
| | - K Fingerman
- Human Development and Family Sciences, University of Texas-Austin, Austin, TX, USA
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Conway C, Graham JL, Chengot P, Daly C, Chalkley R, Ross L, Droop A, Rabbitts P, Stead LF. Elucidating drivers of oral epithelial dysplasia formation and malignant transformation to cancer using RNAseq. Oncotarget 2016; 6:40186-201. [PMID: 26515596 PMCID: PMC4741888 DOI: 10.18632/oncotarget.5529] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2015] [Accepted: 10/09/2015] [Indexed: 02/07/2023] Open
Abstract
Oral squamous cell carcinoma (OSCC) is a prevalent cancer with poor prognosis. Most OSCC progresses via a non-malignant stage called dysplasia. Effective treatment of dysplasia prior to potential malignant transformation is an unmet clinical need. To identify markers of early disease, we performed RNA sequencing of 19 matched HPV negative patient trios: normal oral mucosa, dysplasia and associated OSCC. We performed differential gene expression, principal component and correlated gene network analysis using these data. We found differences in the immune cell signatures present at different disease stages and were able to distinguish early events in pathogenesis, such as upregulation of many HOX genes, from later events, such as down-regulation of adherens junctions. We herein highlight novel coding and non-coding candidates for involvement in oral dysplasia development and malignant transformation, and speculate on how our findings may guide further translational research into the treatment of oral dysplasia.
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Affiliation(s)
- Caroline Conway
- Precancer Genomics, Leeds Institute of Cancer and Pathology, Wellcome Trust Brenner Building, St James's University Hospital, Leeds, LS9 7TF, UK.,Stratified Medicine (Oncology), School of Biomedical Sciences, University of Ulster, Coleraine, Co. Londonderry, BT52 1SA, UK
| | - Jennifer L Graham
- Precancer Genomics, Leeds Institute of Cancer and Pathology, Wellcome Trust Brenner Building, St James's University Hospital, Leeds, LS9 7TF, UK
| | - Preetha Chengot
- Precancer Genomics, Leeds Institute of Cancer and Pathology, Wellcome Trust Brenner Building, St James's University Hospital, Leeds, LS9 7TF, UK
| | - Catherine Daly
- Precancer Genomics, Leeds Institute of Cancer and Pathology, Wellcome Trust Brenner Building, St James's University Hospital, Leeds, LS9 7TF, UK
| | - Rebecca Chalkley
- Precancer Genomics, Leeds Institute of Cancer and Pathology, Wellcome Trust Brenner Building, St James's University Hospital, Leeds, LS9 7TF, UK
| | - Lisa Ross
- Precancer Genomics, Leeds Institute of Cancer and Pathology, Wellcome Trust Brenner Building, St James's University Hospital, Leeds, LS9 7TF, UK
| | - Alastair Droop
- Precancer Genomics, Leeds Institute of Cancer and Pathology, Wellcome Trust Brenner Building, St James's University Hospital, Leeds, LS9 7TF, UK
| | - Pamela Rabbitts
- Precancer Genomics, Leeds Institute of Cancer and Pathology, Wellcome Trust Brenner Building, St James's University Hospital, Leeds, LS9 7TF, UK
| | - Lucy F Stead
- Precancer Genomics, Leeds Institute of Cancer and Pathology, Wellcome Trust Brenner Building, St James's University Hospital, Leeds, LS9 7TF, UK
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Francy DS, Brady AMG, Ecker CD, Graham JL, Stelzer EA, Struffolino P, Dwyer DF, Loftin KA. Estimating microcystin levels at recreational sites in western Lake Erie and Ohio. Harmful Algae 2016; 58:23-34. [PMID: 28073455 DOI: 10.1016/j.hal.2016.07.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2016] [Revised: 07/08/2016] [Accepted: 07/08/2016] [Indexed: 06/06/2023]
Abstract
Cyanobacterial harmful algal blooms (cyanoHABs) and associated toxins, such as microcystin, are a major global water-quality issue. Water-resource managers need tools to quickly predict when and where toxin-producing cyanoHABs will occur. This could be done by using site-specific models that estimate the potential for elevated toxin concentrations that cause public health concerns. With this study, samples were collected at three Ohio lakes to identify environmental and water-quality factors to develop linear-regression models to estimate microcystin levels. Measures of the algal community (phycocyanin, cyanobacterial biovolume, and cyanobacterial gene concentrations) and pH were most strongly correlated with microcystin concentrations. Cyanobacterial genes were quantified for general cyanobacteria, general Microcystis and Dolichospermum, and for microcystin synthetase (mcyE) for Microcystis, Dolichospermum, and Planktothrix. For phycocyanin, the relations were different between sites and were different between hand-held measurements on-site and nearby continuous monitor measurements for the same site. Continuous measurements of parameters such as phycocyanin, pH, and temperature over multiple days showed the highest correlations to microcystin concentrations. The development of models with high R2 values (0.81-0.90), sensitivities (92%), and specificities (100%) for estimating microcystin concentrations above or below the Ohio Recreational Public Health Advisory level of 6μgL-1 was demonstrated for one site; these statistics may change as more data are collected in subsequent years. This study showed that models could be developed for estimates of exceeding a microcystin threshold concentration at a recreational freshwater lake site, with potential to expand their use to provide relevant public health information to water resource managers and the public for both recreational and drinking waters.
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Affiliation(s)
- Donna S Francy
- U.S. Geological Survey, Ohio Water Science Center, 6480 Doubletree Avenue, Columbus, OH 43229, USA.
| | - Amie M G Brady
- U.S. Geological Survey, Ohio Water Science Center, 6480 Doubletree Avenue, Columbus, OH 43229, USA
| | - Christopher D Ecker
- U.S. Geological Survey, Ohio Water Science Center, 6480 Doubletree Avenue, Columbus, OH 43229, USA
| | - Jennifer L Graham
- U.S. Geological Survey, Kansas Water Science Center, 4821 Quail Crest Place, Lawrence, KS 66049, USA
| | - Erin A Stelzer
- U.S. Geological Survey, Ohio Water Science Center, 6480 Doubletree Avenue, Columbus, OH 43229, USA
| | - Pamela Struffolino
- University of Toledo, Lake Erie Center, 6200 Bay Shore Road, Oregon, OH 43616, USA
| | - Daryl F Dwyer
- University of Toledo, Lake Erie Center, 6200 Bay Shore Road, Oregon, OH 43616, USA
| | - Keith A Loftin
- U.S. Geological Survey, Kansas Water Science Center, 4821 Quail Crest Place, Lawrence, KS 66049, USA
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Loftin KA, Graham JL, Hilborn ED, Lehmann SC, Meyer MT, Dietze JE, Griffith CB. Cyanotoxins in inland lakes of the United States: Occurrence and potential recreational health risks in the EPA National Lakes Assessment 2007. Harmful Algae 2016; 56:77-90. [PMID: 28073498 DOI: 10.1016/j.hal.2016.04.001] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 03/31/2016] [Accepted: 04/05/2016] [Indexed: 05/03/2023]
Abstract
A large nation-wide survey of cyanotoxins (1161 lakes) in the United States (U.S.) was conducted during the EPA National Lakes Assessment 2007. Cyanotoxin data were compared with cyanobacteria abundance- and chlorophyll-based World Health Organization (WHO) thresholds and mouse toxicity data to evaluate potential recreational risks. Cylindrospermopsins, microcystins, and saxitoxins were detected (ELISA) in 4.0, 32, and 7.7% of samples with mean concentrations of 0.56, 3.0, and 0.061μg/L, respectively (detections only). Co-occurrence of the three cyanotoxin classes was rare (0.32%) when at least one toxin was detected. Cyanobacteria were present and dominant in 98 and 76% of samples, respectively. Potential anatoxin-, cylindrospermopsin-, microcystin-, and saxitoxin-producing cyanobacteria occurred in 81, 67, 95, and 79% of samples, respectively. Anatoxin-a and nodularin-R were detected (LC/MS/MS) in 15 and 3.7% samples (n=27). The WHO moderate and high risk thresholds for microcystins, cyanobacteria abundance, and total chlorophyll were exceeded in 1.1, 27, and 44% of samples, respectively. Complete agreement by all three WHO microcystin metrics occurred in 27% of samples. This suggests that WHO microcystin metrics based on total chlorophyll and cyanobacterial abundance can overestimate microcystin risk when compared to WHO microcystin thresholds. The lack of parity among the WHO thresholds was expected since chlorophyll is common amongst all phytoplankton and not all cyanobacteria produce microcystins.
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Affiliation(s)
- Keith A Loftin
- U.S. Geological Survey, Organic Geochemistry Research Laboratory, Kansas Water Science Center, Lawrence, KS 66049, USA.
| | - Jennifer L Graham
- U.S. Geological Survey, Kansas Water Science Center, Lawrence, KS 66049, USA.
| | - Elizabeth D Hilborn
- U.S. Environmental Protection Agency, Office of Research and Development, NHEERL, Chapel Hill, NC 27599, USA.
| | - Sarah C Lehmann
- U.S. Environmental Protection Agency, Office of Wetlands, Oceans, and Watersheds, Ariel Rios Bldg., 1200 Pennsylvania Ave., N.W., Mail Code 4503T, Washington, DC 20460, USA.
| | - Michael T Meyer
- U.S. Geological Survey, Organic Geochemistry Research Laboratory, Kansas Water Science Center, Lawrence, KS 66049, USA.
| | - Julie E Dietze
- U.S. Geological Survey, Organic Geochemistry Research Laboratory, Kansas Water Science Center, Lawrence, KS 66049, USA.
| | - Christopher B Griffith
- U.S. Geological Survey, Organic Geochemistry Research Laboratory, Kansas Water Science Center, Lawrence, KS 66049, USA.
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Stumpf RP, Davis TW, Wynne TT, Graham JL, Loftin KA, Johengen TH, Gossiaux D, Palladino D, Burtner A. Challenges for mapping cyanotoxin patterns from remote sensing of cyanobacteria. Harmful Algae 2016; 54:160-173. [PMID: 28073474 DOI: 10.1016/j.hal.2016.01.005] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 01/14/2016] [Accepted: 01/15/2016] [Indexed: 05/04/2023]
Abstract
Using satellite imagery to quantify the spatial patterns of cyanobacterial toxins has several challenges. These challenges include the need for surrogate pigments - since cyanotoxins cannot be directly detected by remote sensing, the variability in the relationship between the pigments and cyanotoxins - especially microcystins (MC), and the lack of standardization of the various measurement methods. A dual-model strategy can provide an approach to address these challenges. One model uses either chlorophyll-a (Chl-a) or phycocyanin (PC) collected in situ as a surrogate to estimate the MC concentration. The other uses a remote sensing algorithm to estimate the concentration of the surrogate pigment. Where blooms are mixtures of cyanobacteria and eukaryotic algae, PC should be the preferred surrogate to Chl-a. Where cyanobacteria dominate, Chl-a is a better surrogate than PC for remote sensing. Phycocyanin is less sensitive to detection by optical remote sensing, it is less frequently measured, PC laboratory methods are still not standardized, and PC has greater intracellular variability. Either pigment should not be presumed to have a fixed relationship with MC for any water body. The MC-pigment relationship can be valid over weeks, but have considerable intra- and inter-annual variability due to changes in the amount of MC produced relative to cyanobacterial biomass. To detect pigments by satellite, three classes of algorithms (analytic, semi-analytic, and derivative) have been used. Analytical and semi-analytical algorithms are more sensitive but less robust than derivatives because they depend on accurate atmospheric correction; as a result derivatives are more commonly used. Derivatives can estimate Chl-a concentration, and research suggests they can detect and possibly quantify PC. Derivative algorithms, however, need to be standardized in order to evaluate the reproducibility of parameterizations between lakes. A strategy for producing useful estimates of microcystins from cyanobacterial biomass is described, provided cyanotoxin variability is addressed.
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Affiliation(s)
- Richard P Stumpf
- National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science, Silver Spring, MD, USA.
| | - Timothy W Davis
- National Oceanic and Atmospheric Administration, Great Lakes Environmental Research Laboratory, Ann Arbor, MI, USA
| | - Timothy T Wynne
- National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science, Silver Spring, MD, USA
| | - Jennifer L Graham
- United States Geological Survey, Kansas Water Science Center, Lawrence, KS, USA
| | - Keith A Loftin
- United States Geological Survey, Kansas Water Science Center, Lawrence, KS, USA
| | - Thomas H Johengen
- Cooperative Institute for Limnology & Ecosystem Research (CILER), Ann Arbor, MI, USA
| | - Duane Gossiaux
- National Oceanic and Atmospheric Administration, Great Lakes Environmental Research Laboratory, Ann Arbor, MI, USA
| | - Danna Palladino
- Cooperative Institute for Limnology & Ecosystem Research (CILER), Ann Arbor, MI, USA
| | - Ashley Burtner
- Cooperative Institute for Limnology & Ecosystem Research (CILER), Ann Arbor, MI, USA
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O'Shea SJ, Mitra A, Graham JL, Charlton R, Adlard J, Merchant W, Newton-Bishop JA. Histopathology of melanocytic lesions in a family with an inherited BAP1 mutation. J Cutan Pathol 2015; 43:287-9. [PMID: 26458093 PMCID: PMC4819440 DOI: 10.1111/cup.12625] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Revised: 08/17/2015] [Accepted: 09/07/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Sally J O'Shea
- Leeds Institute of Cancer and Pathology, Section of Epidemiology and Biostatistics, University of Leeds, Leeds, UK
| | - Angana Mitra
- Dermatology, St. James's University Hospital, Leeds, UK
| | | | - Ruth Charlton
- Clinical Genetics, Yorkshire Regional DNA Laboratory, St. James's University Hospital, Leeds, UK
| | - Julian Adlard
- The Yorkshire Regional Genetics Service, Chapel Allerton Hospital, Leeds, UK
| | - Will Merchant
- Histopathology, St. James's University Hospital, Leeds, UK
| | - Julia A Newton-Bishop
- Leeds Institute of Cancer and Pathology, Section of Epidemiology and Biostatistics, University of Leeds, Leeds, UK
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Taylor PH, Yamada T, Striebich RC, Graham JL, Giraud RJ. Investigation of waste incineration of fluorotelomer-based polymers as a potential source of PFOA in the environment. Chemosphere 2014; 110:17-22. [PMID: 24880594 DOI: 10.1016/j.chemosphere.2014.02.037] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 01/31/2014] [Accepted: 02/06/2014] [Indexed: 05/27/2023]
Abstract
In light of the widespread presence of perfluorooctanoic acid (PFOA) in the environment, a comprehensive laboratory-scale study has developed data requested by the U.S. Environmental Protection Agency (EPA) to determine whether municipal and/or medical waste incineration of commercial fluorotelomer-based polymers (FTBPs) at end of life is a potential source of PFOA that may contribute to environmental and human exposures. The study was divided into two phases (I and II) and conducted in accordance with EPA Good Laboratory Practices (GLPs) as described in the quality assurance project plan (QAPP) for each phase. Phase I testing determined that the PFOA transport efficiency across the thermal reactor system to be used in Phase II was greater than 90%. Operating at 1000°C over 2s residence time with 3.2-6.6mgdscm(-1) hydrogen fluoride (HF), corrected to 7% oxygen (O2), and continuously monitored exhaust oxygen of 13%, Phase II testing of the FTBP composites in this thermal reactor system yielded results demonstrating that waste incineration of fluorotelomer-based polymers does not result in the formation of detectable levels of PFOA under conditions representative of typical municipal waste combustor (MWC) and medical waste incinerator (MWI) operations in the U.S. Therefore, waste incineration of these polymers is not expected to be a source of PFOA in the environment.
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Affiliation(s)
- P H Taylor
- University of Dayton Research Institute, Environmental Engineering Group, 300 College Park, Dayton, OH 45469, United States.
| | - T Yamada
- University of Dayton Research Institute, Environmental Engineering Group, 300 College Park, Dayton, OH 45469, United States
| | - R C Striebich
- University of Dayton Research Institute, Environmental Engineering Group, 300 College Park, Dayton, OH 45469, United States
| | - J L Graham
- University of Dayton Research Institute, Environmental Engineering Group, 300 College Park, Dayton, OH 45469, United States
| | - R J Giraud
- E.I. du Pont de Nemours and Company, Inc., 1007 Market Street, Wilmington, DE 19898, United States
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des Courtis X, Wei A, Kass PH, Fascetti AJ, Graham JL, Havel PJ, Ramsey JJ. Influence of dietary protein level on body composition and energy expenditure in calorically restricted overweight cats. J Anim Physiol Anim Nutr (Berl) 2014; 99:474-82. [PMID: 25073483 DOI: 10.1111/jpn.12239] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2013] [Accepted: 07/07/2014] [Indexed: 11/30/2022]
Abstract
High-protein (HP) diets help prevent loss of lean mass in calorie-restricted (CR) cats. However, it is not entirely known whether these diets also induce changes of energy expenditure during periods of CR. To investigate this issue, sixteen overweight cats were fed either a high-protein [(HP), 54.2% of metabolizable energy (ME)] or a moderate-protein [(MP), 31.5% of ME] diet at 70% of their maintenance energy intakes for 8 weeks, and energy expenditure, energy intake, body weight and composition, and serum metabolites and hormones were measured. While both groups of cats lost weight at a similar rate, only cats eating the HP diet maintained lean mass during weight loss. Indirect respiration calorimetry measurements revealed that both total and resting energy expenditure (kcal/d) significantly decreased during weight loss for both treatment groups. However, only cats eating the MP diet exhibited significant decreases of total and resting energy expenditures after energy expenditure was normalized for body weight or lean mass. Results from this study suggest that in addition to sparing the loss of lean mass, feeding HP diets to overweight cats in restricted amounts may be beneficial for preventing or minimizing decreases of mass-adjusted energy expenditure during weight loss.
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Affiliation(s)
- X des Courtis
- Department of Molecular Biosciences, School of Veterinary Medicine, University of California, Davis, CA, USA
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Rountree AM, Reed BJ, Cummings BP, Jung SR, Stanhope KL, Graham JL, Griffen SC, Hull RL, Havel PJ, Sweet IR. Loss of coupling between calcium influx, energy consumption and insulin secretion associated with development of hyperglycaemia in the UCD-T2DM rat model of type 2 diabetes. Diabetologia 2013; 56:803-13. [PMID: 23404441 PMCID: PMC3855025 DOI: 10.1007/s00125-012-2808-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Accepted: 12/03/2012] [Indexed: 10/27/2022]
Abstract
AIMS/HYPOTHESIS Previous studies on isolated islets have demonstrated tight coupling between calcium (Ca(2+)) influx and oxygen consumption rate (OCR) that is correlated with insulin secretion rate (ISR). To explain these observations, we have proposed a mechanism whereby the activation of a highly energetic process (Ca(2+)/metabolic coupling process [CMCP]) by Ca(2+) mediates the stimulation of ISR. The aim of the study was to test whether impairment of the CMCP could play a role in the development of type 2 diabetes. METHODS Glucose- and Ca(2+)-mediated changes in OCR and ISR in isolated islets were compared with the time course of changes of plasma insulin concentrations observed during the progression to hyperglycaemia in a rat model of type-2 diabetes (the University of California at Davis type 2 diabetes mellitus [UCD-T2DM] rat). Islets were isolated from UCD-T2DM rats before, 1 week, and 3 weeks after the onset of hyperglycaemia. RESULTS Glucose stimulation of cytosolic Ca(2+) and OCR was similar for islets harvested before and 1 week after the onset of hyperglycaemia. In contrast, a loss of decrement in islet OCR and ISR in response to Ca(2+) channel blockade coincided with decreased fasting plasma insulin concentrations observed in rats 3 weeks after the onset of hyperglycaemia. CONCLUSIONS/INTERPRETATION These results suggest that phenotypic impairment of diabetic islets in the UCD-T2DM rat is downstream of Ca(2+) influx and involves unregulated stimulation of the CMCP. The continuously elevated levels of CMCP induced by chronic hyperglycaemia in these islets may mediate the loss of islet function.
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Affiliation(s)
- A M Rountree
- Diabetes and Obesity Center of Excellence, University of Washington, 850 Republican Street, Seattle, WA 98109-8055, USA
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Cox CL, Stanhope KL, Schwarz JM, Graham JL, Hatcher B, Griffen SC, Bremer AA, Berglund L, McGahan JP, Havel PJ, Keim NL. Consumption of fructose-sweetened beverages for 10 weeks reduces net fat oxidation and energy expenditure in overweight/obese men and women. Eur J Clin Nutr 2011; 66:201-8. [PMID: 21952692 PMCID: PMC3252467 DOI: 10.1038/ejcn.2011.159] [Citation(s) in RCA: 96] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
BACKGROUND/OBJECTIVES The results of short-term studies in humans suggest that, compared with glucose, acute consumption of fructose leads to increased postprandial energy expenditure and carbohydrate oxidation and decreased postprandial fat oxidation. The objective of this study was to determine the potential effects of increased fructose consumption compared with isocaloric glucose consumption on substrate utilization and energy expenditure following sustained consumption and under energy-balanced conditions. SUBJECTS/METHODS As part of a parallel arm study, overweight/obese male and female subjects, 40-72 years, consumed glucose- or fructose-sweetened beverages providing 25% of energy requirements for 10 weeks. Energy expenditure and substrate utilization were assessed using indirect calorimetry at baseline and during the 10th week of intervention. RESULTS Consumption of fructose, but not glucose, led to significant decreases of net postprandial fat oxidation and significant increases of net postprandial carbohydrate oxidation (P<0.0001 for both). Resting energy expenditure (REE) decreased significantly from baseline values in subjects consuming fructose (P=0.031) but not in those consuming glucose. CONCLUSIONS Increased consumption of fructose for 10 weeks leads to marked changes of postprandial substrate utilization including a significant reduction of net fat oxidation. In addition, we report that REE is reduced compared with baseline values in subjects consuming fructose-sweetened beverages for 10 weeks.
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Affiliation(s)
- C L Cox
- Department of Nutrition, University of California, Davis, Davis, CA, USA
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Graham JL, Loftin KA, Meyer MT, Ziegler AC. Cyanotoxin mixtures and taste-and-odor compounds in cyanobacterial blooms from the Midwestern United States. Environ Sci Technol 2010; 44:7361-8. [PMID: 20831209 DOI: 10.1021/es1008938] [Citation(s) in RCA: 237] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/19/2023]
Abstract
The mixtures of toxins and taste-and-odor compounds present during cyanobacterial blooms are not well characterized and of particular concern when evaluating potential human health risks. Cyanobacterial blooms were sampled in twenty-three Midwestern United States lakes and analyzed for community composition, thirteen cyanotoxins by liquid chromatography/mass spectrometry and immunoassay, and two taste-and-odor compounds by gas chromatography/mass spectrometry. Aphanizomenon, Cylindrospermopsis and/or Microcystis were dominant in most (96%) blooms, but community composition was not strongly correlated with toxin and taste-and-odor occurrence. Microcystins occurred in all blooms. Total microcystin concentrations measured by liquid chromatography/mass spectrometry and immunoassay were linearly related (r(s) = 0.76, p < 0.01) and LC/MS/MS concentrations were lower than or similar to ELISA in most (85%) samples. Geosmin (87%), 2-methylisoborneol (39%), anatoxin-a (30%), saxitoxins (17%), cylindrospermopsins (9%), and nodularin-R (9%) also were present in these blooms. Multiple classes of cyanotoxins occurred in 48% of blooms and 95% had multiple microcystin variants. Toxins and taste-and-odor compounds frequently co-occurred (91% of blooms), indicating odor may serve as a warning that cyanotoxins likely are present. However, toxins occurred more frequently than taste-and-odor compounds, so odor alone does not provide sufficient warning to ensure human-health protection.
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Affiliation(s)
- Jennifer L Graham
- United States Geological Survey, Kansas Water Science Center, 4821 Quail Crest Place, Lawrence, Kansas 66049, USA.
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Graham PH, Graham JL. Use of deodorants during adjuvant breast radiotherapy: A survey of compliance with standard advice, impact on patients and a literature review on safety. J Med Imaging Radiat Oncol 2009; 53:569-73. [DOI: 10.1111/j.1754-9485.2009.02125.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Graham JL, Jones JR, Jones SB, Downing JA, Clevenger TE. Environmental factors influencing microcystin distribution and concentration in the Midwestern United States. Water Res 2004; 38:4395-4404. [PMID: 15556214 DOI: 10.1016/j.watres.2004.08.004] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2004] [Indexed: 05/24/2023]
Abstract
During May-September 2000-2001, physicochemical data were collected from 241 lakes in Missouri, Iowa, northeastern Kansas, and southern Minnesota U.S.A., to determine the environmental variables associated with high concentrations of the cyanobacterial hepatotoxin microcystin (MC). The study region represents a south-north latitudinal gradient in increasing trophic status, with total phosphorus (TP) and total nitrogen (TN) values ranging between 2-995 and 90-15870 microg/L, respectively. Particulate MC values, measured by ELISA, ranged from undetectable to 4500 ng/L and increased with increasing latitude. Despite latitudinal trends, environmental variables explained < 50% of the variation in MC values. Inspection of MC-TN and MC-Secchi bivariate plots revealed distinctly nonlinear trends, suggesting optima for maximum MC values. Nonlinear interval maxima regression indicated that MC-TN maxima were characterized by a unimodal curve, with maximal (> 2000 ng/L) MC values occurring between 1500 and 4000 microg/L TN. Above 8000 microg/L TN all MC values were < 150 ng/L. MC-Secchi maxima were characterized by exponential decline, with maximal MC values occurring at Secchi depths < 2.5 m. The development of empirical relationships between environmental variables and MC values is critical to effective lake management and minimization of human health risks associated with the toxin. This study indicates MC values are linked to the physicochemical environment; however, the relationships are not traditional linear models.
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Affiliation(s)
- Jennifer L Graham
- Department of Fisheries and Wildlife Sciences, University of Missouri, 302 Anheuser Busch Natural Resources Building, Columbia, Missouri, 65211-7420, USA.
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Graham JL, Striebich R, Patterson CL, Radha Krishnan E, Haught RC. MTBE oxidation byproducts from the treatment of surface waters by ozonation and UV-ozonation. Chemosphere 2004; 54:1011-1016. [PMID: 14637359 DOI: 10.1016/j.chemosphere.2003.09.017] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
In recent years, there has been considerable concern over the release of methyl tert-butyl ether (MTBE), a gasoline additive, into the aquifers used as potable water sources. MTBE readily dissolves in water and has entered the environment via gasoline spills and leaking storage tanks. In this paper, we investigate ozonation and UV-ozonation for treatment of MTBE in contaminated drinking water sources. We report the test protocol and results of using solid-phase microextraction (SPME) to determine the level of MTBE and its oxidation byproducts in samples drawn from laboratory-scale ozone and UV-ozone reactors being evaluated at a US EPA research facility. Analysis of a prepared MTBE standard indicated a detection limit on the order of 0.1 microgl(-1) with a repeatability of +/-0.4%. Results show that the overall rate of removal of MTBE via UV-ozonation in a relatively turbid surface water (15 ntu) is twice that of ozonation alone. In addition, GC-MS analysis of decomposition products showed that tert-butyl formate (TBF), methyl acetate, butene, acetone, and acetaldehyde were produced by both processes. TBF and butene reach similar maximum yields from the two processes, but are more efficiently degraded by UV-ozonation treatment. This indicates that these treatment processes also degrade these byproducts. In contrast, the remaining byproducts (methyl acetate, acetone, and acetaldehyde) are formed at similar levels during treatment, but are not degraded once formed. These byproducts may be resistant to hydrogen abstraction by hydroxyl radical.
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Affiliation(s)
- J L Graham
- University of Dayton Research Institute, 300 College Park, Dayton, OH 45469-0132, USA.
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Graham JL. Caring from afar: expanding our concept of care in the profession. Prof Ethics 2003; 9:31-60. [PMID: 12622066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Affiliation(s)
- J L Graham
- Department of Philosophy, 6080 Haley Center, Auburn University, Auburn, AL 36849-5210, USA.
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Rudnicki SR, Graham JL, Habboushe DF, Ross RD. Social support and avoidant coping: correlates of depressed mood during pregnancy in minority women. Women Health 2002; 34:19-34. [PMID: 11708685 DOI: 10.1300/j013v34n03_02] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
INTRODUCTION The purpose of this study was to evaluate several psychosocial correlates of depressed mood during pregnancy. The psychosocial factors examined included background characteristics (socioeconomic status, planning of pregnancy), perceived social support, and coping styles. METHODS One hundred fifty pregnant lower income, minority women were recruited from an obstetrics clinic at an urban hospital. Patients completed a battery of psychosocial measures including measures of social support, coping style, and depressed mood. RESULTS Perceived social support and an avoidant coping style were the most salient psychosocial correlates of depressed mood during pregnancy, accounting for 34% of the variance in the model. More specifically, women who reported less social support satisfaction experienced greater avoidant coping strategies, which was then associated with higher levels of depressed mood. CONCLUSIONS This study suggests that women who perceive less social support satisfaction utilize more avoidant coping strategies and experience greater depression mood. Thus, although these associations are not indicative of a causal relationship, results raise the possibility that women at-risk for depressed mood during pregnancy can be identified by assessing perceived social support and coping styles. Future prospective studies are needed to test the causal relationships among these variables. Clinical interventions to target these psychosocial factors during pregnancy are discussed.
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Affiliation(s)
- S R Rudnicki
- Department of Clinical and Health Psychology, MCP Hahnemann University, Philadelphia, PA 19102-1192, USA
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Abstract
Evans blue dye, given i.c.v. in rats in a dose of 208 nmol, causes electrical and behavioural seizures which resemble those induced by the glutamate analogue, kainate, or by electrical kindling of the amygdala. Chicago sky blue, 201 nmol i.c.v., produces similar seizures. The principal elements of the seizures are wet-rat-shakes, facial and forelimb clonus, rearing and spike-and-waves in the EEG. A non-NMDA receptor antagonist, GYKI 52466 and a benzodiazepine, diazepam, significantly delay the onset to the occurrence of the first forelimb clonus. The cholinergic antagonist, scopolamine, significantly reduces the delay to onset of first facial clonus. The competitive NMDA receptor antagonist, D-CPPene, the non-specific dopamine antagonist, haloperidol, and the purinergic agonist, 2-chloroadenosine, have no effect on the measured parameters. During the induction of seizures by Evans blue, the average extracellular glutamate concentration in hippocampus or cortex does not increase statistically significantly in comparison to pre-seizure values. Histological examination of limbic areas indicates that the moderate to severe Evans blue-induced cell damage is similar to that seen after limbic seizures induced by pilocarpine and in the hippocampus is partially preventable by D-CPPene but not by diazepam or GYKI 52466. It is proposed that Evans blue-induced seizures may be useful as a new model for studying the mechanisms of intractable epilepsy of the complex partial seizure type.
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Affiliation(s)
- N Dürmüller
- Department of Neurology, Institute of Psychiatry, De Crespigny Park, Denmark Hill, London, UK
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Chleboun GS, Howell JN, Baker HL, Ballard TN, Graham JL, Hallman HL, Perkins LE, Schauss JH, Conatser RR. Intermittent pneumatic compression effect on eccentric exercise-induced swelling, stiffness, and strength loss. Arch Phys Med Rehabil 1995; 76:744-9. [PMID: 7632130 DOI: 10.1016/s0003-9993(95)80529-x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
OBJECTIVE The purpose was to determine if intermittent pneumatic compression (IPC) affects muscle swelling, stiffness, and strength loss resulting from eccentric exercise-induced injury of the elbow flexors. We hypothesized that the compression would decrease swelling and stiffness. DESIGN Repeated measures design with a before-after trial comparison within each day. SETTING Conducted at a university Somatic Dysfunction Laboratory. SUBJECTS Twenty-two college women students were studied. They had not been lifting weights or otherwise participating in regular arm exercise for the 6 months before the study. They had no history of upper extremity injury or cardiovascular disease. INTERVENTIONS Subjects performed one bout of eccentric exercise at a high load to induce elbow flexor muscle injury. Uniform IPC was applied on the day of exercise and daily for 5 days at 60mmHg, 40 seconds inflation, 20 deflation for 20 minutes. MAIN OUTCOME MEASURES Measurements of arm circumference, stiffness, and isometric strength were recorded before exercise, then before and after IPC for 5 days after exercise. Passive muscle stiffness was measured on a device that extends the elbow stepwise and records the torque required to hold the forearm at each elbow angle. RESULTS Circumference and stiffness increased and strength decreased during the 5 days post-exercise (p < .05). IPC significantly decreased circumference and stiffness most notably on days 2 and 3 after exercise (p < .05). The strength loss was not affected by IPC. CONCLUSION IPC is effective in temporarily decreasing the swelling and stiffness after exercise-induced muscle injury.
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Affiliation(s)
- G S Chleboun
- Ohio University School of Physical Therapy, College of Osteopathic Medicine, Athens 45701, USA
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Abstract
A 14-year-old white female is treated for a common ingrown toenail with a permanent ablative procedure. The patient feigns factitious illness in the form of a postoperative infection to prolong medical care. No past history of neurotic disorder is related. Finally, after five hospitalizations, factitious illness is identified.
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Arvin B, Lekieffre D, Graham JL, Moncada C, Chapman AG, Meldrum BS. Effect of the non-NMDA receptor antagonist GYKI 52466 on the microdialysate and tissue concentrations of amino acids following transient forebrain ischaemia. J Neurochem 1994; 62:1458-67. [PMID: 7907651 DOI: 10.1046/j.1471-4159.1994.62041458.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The effect of the non-N-methyl-D-aspartate (non-NMDA) receptor antagonist 1-(4-aminophenyl)-4-methyl-7,8-methylenedioxy-5H-2,3-benzodiazepine hydrochloride (GYKI 52466) on ischaemia-induced changes in the microdialysate and tissue concentrations of glutamate, aspartate, and gamma-aminobutyric acid (GABA) was studied in rats. Twenty minutes of four-vessel occlusion resulted in a transient increase in microdialysate levels of glutamate, aspartate, and GABA in striatum, cortex, and hippocampus. Administration of GYKI 52466 (10 mg/kg bolus + 10 mg/kg/60 min intravenously starting 20 min before onset of ischaemia) inhibited ischaemia-induced increases in microdialysate glutamate and GABA in striatum without affecting the increases in hippocampus or cortex. Twenty minutes of four-vessel occlusion resulted in immediate small decreases and larger delayed (72 h) decreases in tissue levels of glutamate and aspartate. Transient increases in tissue levels of GABA were shown in all three structures at the end of the ischaemic period. At 72 h, after the ischaemic period, significantly reduced GABA levels were observed in striatum and hippocampus. GYKI 52466, given under identical conditions as above, augmented the ischaemia-induced decrease in striatal tissue levels of glutamate and aspartate, without significantly affecting the decreases in hippocampus and cortex. Twenty minutes of ischaemia resulted in a large increase in microdialysate dopamine in striatum. GYKI 52466 failed to inhibit this increase. Kainic acid (500 microM infused through the probe for 20 min) caused increases in microdialysate glutamate and aspartate in the striatum. GYKI 52466 (10 mg/kg bolus + 10 mg/kg/60 min) completely inhibited the kainic acid-induced glutamate release. In conclusion, the action of the non-NMDA antagonist, GYKI 52466, in the striatum is different from that in the cortex and hippocampus. The inhibition by GYKI 52466 of ischaemia-induced and kainate-induced increases in microdialysate glutamate concentration in the striatum may be related to the neuroprotection provided by GYKI 52466 in this region.
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Affiliation(s)
- B Arvin
- Department of Neurology, Institute of Psychiatry, London, England
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Chapman AG, Graham JL, Patel S, Meldrum BS. Anticonvulsant activity of two orally active competitive N-methyl-D-aspartate antagonists, CGP 37849 and CGP 39551, against sound-induced seizures in DBA/2 mice and photically induced myoclonus in Papio papio. Epilepsia 1991; 32:578-87. [PMID: 1678345 DOI: 10.1111/j.1528-1157.1991.tb04695.x] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Two novel N-methyl-D-aspartate (NMDA) antagonists, DL-(E)-2-amino-4-methyl-5-phosphono-3-pentenoic acid CPG 37849 and the corresponding 1-ethyl ester CGP 39551, were tested as anticonvulsants in DBA/2 mice and photosensitive Senegalese baboons, Papio papio. In DBA/2 mice, CGP 37849 is more potent than CGP 39551 when administered intracerebroventricularly (i.c.v.) or intraperitoneally (i.p.) (ED50 for suppression of clonic seizures at 60 min: i.c.v. 0.038 and 0.21 nmol; i.p. 3.40 and 19.1 mumol/kg, respectively). When administered orally in mice, the two compounds are approximately equipotent (ED50 CGP 37849, 35.2 mumol/kg; ED50 CGP 39551, 28.1 mumol/kg). The time course of action of CGP 39551 is exceptionally prolonged: 42 mumol/kg i.p. protects against clonic seizures for 48 h. Protection provided by other NMDA antagonists in mice is of much shorter duration: 2-amino-5-phosphono-pentanoic acid (AP5) 1 h, 2-amino-7-phosphono-heptanoic acid (AP7) 4 h, 2-amino-7-phosphono-heptanoic acid 1-ethyl ester 3 h, 4-(3-phosphonopropyl)-2-piperazine carboxylic acid (CPP) 2 h, cis-4-(phosphonomethyl)-2-piperidine-carboxylic acid (CGS 19755) 4 h, and CGP 37849 4 h. After oral administration of the drugs, the therapeutic index (TI = ratio of the ED50 values for rotorod performance and anticonvulsant protection) remains relatively constant at 5.9-7.2 for 3 h (CGP 37849) and 4.0-6.1 for 24 h (CGP 39551). After i.p. administration, the TI values are CGP 37849 at 1 h 2.4, and at 3 h 20.0, CGP 39551 at 1 h 2.3, at 3 h 7.1, and at 24 h 3.6. In baboons, acute administration of CGP 37849 at doses of 48-191 mumol/kg intravenously (i.v.) suppresses photically induced myoclonus for at least 285 min, with severe side effects at the highest dose tested. CGP 39551 at doses of 169-675 mumol/kg i.v. shows weak anticonvulsant activity only at the highest dose tested (accompanied by severe side effects). CGP 37849 at 48-96 mumol/kg orally (p.o.) fails to protect against photically induced myoclonus up to 4 h after administration, but 191 mumol/kg (40 mg/kg) p.o. produces complete suppression of seizures after 24 h. On the other hand, CGP 39551 at 169 mumol/kg (40 mg/kg) p.o. produces total suppression of seizure activity at 4 h with a longer duration of anticonvulsant action (2-3 days).(ABSTRACT TRUNCATED AT 400 WORDS)
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Affiliation(s)
- A G Chapman
- Department of Neurology, Institute of Psychiatry, De Crespigny Park, London, England
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Patel S, Chapman AG, Graham JL, Meldrum BS, Frey P. Anticonvulsant activity of the NMDA antagonists, D(-)4-(3-phosphonopropyl) piperazine-2-carboxylic acid (D-CPP) and D(-)(E)-4-(3-phosphonoprop-2-enyl) piperazine-2-carboxylic acid (D-CPPene) in a rodent and a primate model of reflex epilepsy. Epilepsy Res 1990; 7:3-10. [PMID: 2292244 DOI: 10.1016/0920-1211(90)90049-2] [Citation(s) in RCA: 68] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
D-(-)4-(3-phosphonopropyl)piperazine-2-carboxylic acid (D-CPP) and its unsaturated analogue (D(-)(E)-4-(3-phosphonoprop-2-enyl) piperazine-2-carboxylic acid (D-CPPene) have been administered to DBA/2 mice (intracerebroventricularly, i.c.v., intraperitoneally, i.p., and orally, p.o.) and to photosensitive baboons, Papio papio (intravenously, i.v., and orally), and their effects on reflexly induced epileptic responses assessed. In DBA/2 mice the clonic phase of the seizure response to sound is suppressed by D-CPP with an ED50 of 5.5 micrograms/mouse, i.c.v.; 0.69 mg (2.75 mumol)/kg i.p. and 16.6 mg (65.8 mumol)/kg p.o. compared with, for D-CPPene, 2.2 micrograms/mouse i.c.v., 0.41 mg (1.54 mumol)/kg i.p. and 10.8 mg (40.2 mumol)/kg, p.o. In Papio papio myoclonic responses to stroboscopic stimulation are suppressed 24 and 48 h after D-CPP 32 mg (127 mumol)/kg p.o. Administration of D-CPPene 8-16 mg (30-60 mumol)/kg i.v. produces protection against myoclonic responses after 1-2 h, lasting for 48 h. Oral administration of D-CPPene 32-64 mg (119-239 mumol)/kg produces protection beginning after 4 h and sustained for 48 h. Measurements of plasma D-CPPene concentration show rapid clearance after i.v. injection and a low plasma concentration 1.5-5 h after oral administration. The prolonged anticonvulsant action of D-CPP and D-CPPene following oral administration suggests that these compounds merit evaluation as antiepileptic therapy in man.
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Affiliation(s)
- S Patel
- Department of Neurology, Institute of Psychiatry, Denmark Hill, London
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Graham JL, McCaughey W, Bell PF. Nalbuphine and pentazocine in an opioid-benzodiazepine sedative technique: a double-blind comparison. Ann R Coll Surg Engl 1988; 70:200-4. [PMID: 3046465 PMCID: PMC2498783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
Sedation by a combination of an opioid drug such as pentazocine with a benzodiazepine is commonly used for minor surgical and investigative procedures. Nalbuphine is a newer drug which, like pentazocine, is an opioid agonist-antagonist. Its actions are similar, but it has theoretical advantages in its profile of cardiovascular side effects. Nalbuphine or pentazocine in combination with diazepam were compared as components of a sedative technique for invasive radiology. The doses used were in the ratio of 2.5:1--ie nalbuphine 0.2 mg kg-1 and pentazocine 0.5 mg kg-1. Both regimens gave satisfactory results, and no difference could be detected between them in terms of sedation, analgesic efficacy, cardiovascular or respiratory changes, or recovery. Nalbuphine provides a safe and effective alternative to pentazocine in this situation. The study confirmed the need for caution because of the respiratory depressant effects of both drugs.
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Graham JL, Hall DL, Dellinger B. Laboratory investigation of the thermal degradation of a mixture of hazardous organic compounds. 1. Environ Sci Technol 1986; 20:703-710. [PMID: 22185315 DOI: 10.1021/es00149a009] [Citation(s) in RCA: 36] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
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Reith S, Graham JL, McEwan C. Diabetes under your control: microcomputer quiz--a pilot study. Diabet Med 1984; 1:318. [PMID: 6242825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
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Graham JL, McEwan C, Reith S. Video medicine. West J Med 1983. [DOI: 10.1136/bmj.286.6377.1576-b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Abstract
In order to investigate the time course of the late respiratory depression which has been reported following epidural opiates, the response to CO2 was measured in 11 patients. Epidural morphine 2 mg was given 1 hour after operation under bupivacaine epidural anaesthesia, and the patients nursed supine. The results show a consistent pattern of respiratory depression commencing at approximately 48 hours, and continuing until 18-24 hours after administration of morphine. A similar group of 10 patients nursed in a sitting position did not show the same degree of depression, and a modifying effect of posture on the development of central effects is suggested.
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Aronstam RS, Graham JL, Narayanan L. Receptor--ion channel interactions in Torpedo electric organ: influence of thiol group modification. Neurosci Lett 1982; 31:53-8. [PMID: 6289201 DOI: 10.1016/0304-3940(82)90053-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The influence of sulfhydryl and disulfide reagents on nicotinic cholinergic receptors and ion channels and their interactions was investigated using specific probes for receptor and channel binding sites in electric organs from Torpedo californica. N-ethylmaleimide, a sulfhydryl alkylating agent, did not alter receptor or ion channel binding, or receptor-mediated ion channel binding activation or desensitization. Alteration of receptor--ion channel coupling produced by treatment with an organic sulfhydryl, dithiothreitol, could be accounted for on the basis of decreases in receptor affinity for agonists. These changes were reversed by exposure to an oxidizing agent. Following reduction by dithiothreitol, N-ethylmaleimide treatment produced large decreases in the extent and affinity of both receptor and channel binding. No evidence for a direct role of thiol groups in ion channel function was obtained.
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Graham JL. Health education: focusing on the video show. Health Soc Serv J 1980; 90:948-9. [PMID: 10247943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
In his second article on patient education Dr J. L. Graham, chief administrative medical officer, Forth Valley Health Board, describes how six short videotapes are being produced and evaluated in a research project. The research consists of four main areas: preliminary work, exploratory work, production of the videotape and, lastly, evaluation of its effectiveness.
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Graham JL. Health education: message and medium. Health Soc Serv J 1980; 90:911-2. [PMID: 10315107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Abstract
During 1979, 1980 and 1981, the Scottish Health Education Unit of the Scottish Health Service Common Services Agency is funding a research project involving the production and evaluation of six video recorded health education programmes. The project is being undertaken by the Department of Community Medicine of the Forth Valley Health Board and the Department of Continuing Medicine, Stirling University. In the first of two articles, Dr J.L. Graham, Chief Administrative Medical Officer, Forth Valley Health Board, and Chairman of the project's steering committee, describes the benefits of this approach.
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Abstract
In postoperative prostatectomy patients, morphine 2 mg in 10 ml 0.9% saline was given epidurally for pain relief and its effectiveness compared with bupivacaine. The duration of analgesia with morphine was approximately double that with bupivacaine. Significant hypotension occurred in approximately 5% of the patients receiving bupivacaine, but was not seen following morphine. These seem to be important advantages in the use of morphine by this route.
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Graham JL, Merwin CF. The tent sign of pilomatricoma. Cutis 1978; 22:577-80. [PMID: 729402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Smith EB, Graham JL, Ledman JA, Snyder RD. Fucosidosis. Cutis 1977; 19:195-8. [PMID: 402253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Disseminated angiokeratomas can be seen in patients with an inherited deficiency of alpha-l-fucosidase as well as in patients with classic Fabry's disease. Patients with deficiency of this lysosomal enzyme, or fucosidosis, have spasticity, mental retardation, and retardation of growth in addition to angiokeratomas. We herein report three new cases of this rare syndrome.
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Abstract
One hundred and four patients with mycologically confirmed tinea pedis took part in a controlled clinical trial to determine the efficacy of undecylenic acid powder preparations in the treatment of their fungal infections. Clinical and mycological cures were obtained in 53% of those subjects treated with undecylenic acid powders as compared with 7% of those treated with the talc vehicle or left untreated. Undecylenic acid in a powder vehicle appears to be a safe and effective agent in the treatment of tinea pedis.
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Abstract
Clotrimazole is a new antifungal agent which is effective topically in dermatophytosis, cutaneous candidiasis, and tinea vesicolor. The authors performed a controlled double-blind clinical trial comparing topical clotrimazole with its vehicle in the treatment of 66 patients with dermatophytic infections of the skin of the feet. Clotrimazole proved to be effective in the treatment of tinea pedis of both the interdigital and the plantar hyperkeratotic types.
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Graham JL, Soderquist MR. Fruit, vegetable, and grain processing wastes. J Water Pollut Control Fed 1976; 48:1223-57. [PMID: 781323] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Smith EB, Powell RF, Graham JL. Letter: Periorbital dermatitis. Arch Dermatol 1976; 112:563. [PMID: 1267477] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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Stewart RF, Graham JL. Evaluation tools in public health nursing education. Nurs Outlook 1968; 16:50-1. [PMID: 5183835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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