1
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Cornish CM, Johnson OF, Bansal S, Meier JA, Harris TD, Sweetman JN. Common use herbicides increase wetland greenhouse gas emissions. Sci Total Environ 2024; 933:172881. [PMID: 38701922 DOI: 10.1016/j.scitotenv.2024.172881] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 04/27/2024] [Accepted: 04/27/2024] [Indexed: 05/05/2024]
Abstract
Wetlands play a disproportionate role in the global climate as major sources and sinks of greenhouse gases. Herbicides are the most heavily used agrochemicals and are frequently detected in aquatic ecosystems, with glyphosate and 2,4-Dichlorophenoxyacetic acid (2,4-D), representing the two most commonly used worldwide. In recent years, these herbicides are being used in mixtures to combat herbicide-tolerant noxious weeds. While it is well documented that herbicide use for agriculture is expected to increase, their indirect effects on wetland greenhouse gas dynamics are virtually unknown. To fill this knowledge gap, we conducted a factorial microcosm experiment using low, medium, and high concentrations of glyphosate or 2,4-D, individually and in combination to investigate their effects on wetland methane, carbon dioxide, and nitrous oxide fluxes. We predicted that mixed herbicide treatments would have a synergistic effect on greenhouse gases compared to individual herbicides. Our results showed that carbon dioxide flux rates and cumulative emissions significantly increased from both individual and mixed herbicide treatments, whereas methane and nitrous oxide dynamics were less affected. This study suggests that extensive use of glyphosate and 2,4-D may increase carbon dioxide emissions from wetlands, which could have implications for climate change.
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Affiliation(s)
- Christine M Cornish
- Environmental and Conservation Sciences, North Dakota State University, 1340 Administration Avenue, Fargo, ND 58105, United States.
| | - Olivia F Johnson
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND, United States; Department of Biological Sciences, Kent State University, Kent, OH, United States
| | - Sheel Bansal
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND, United States
| | - Jacob A Meier
- U.S. Geological Survey, Northern Prairie Wildlife Research Center, Jamestown, ND, United States
| | - Ted D Harris
- Kansas Biological Survey and Center for Ecological Research, Lawrence, KS, United States
| | - Jon N Sweetman
- Department of Ecosystem Science and Management, The Pennsylvania State University, 457 ASI Building, University Park, PA 16802, United States
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2
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Rider Z, Percich A, Hiripitiyage Y, Harris TD, Sturm BSM, Wilson AE, Pollock ED, Beaver JR, Husic A. Drivers of cyanotoxin and taste-and-odor compound presence within the benthic algae of human-disturbed rivers. Water Res 2024; 253:121357. [PMID: 38401471 DOI: 10.1016/j.watres.2024.121357] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/18/2024] [Accepted: 02/21/2024] [Indexed: 02/26/2024]
Abstract
Freshwater benthic algae form complex mat matrices that can confer ecosystem benefits but also produce harmful cyanotoxins and nuisance taste-and-odor (T&O) compounds. Despite intensive study of the response of pelagic systems to anthropogenic change, the environmental factors controlling toxin presence in benthic mats remain uncertain. Here, we present a unique dataset from a rapidly urbanizing community (Kansas City, USA) that spans environmental, toxicological, taxonomic, and genomic indicators to identify the prevalence of three cyanotoxins (microcystin, anatoxin-a, and saxitoxin) and two T&O compounds (geosmin and 2-methylisoborneol). Thereafter, we construct a random forest model informed by game theory to assess underlying drivers. Microcystin (11.9 ± 11.6 µg/m2), a liver toxin linked to animal fatalities, and geosmin (0.67 ± 0.67 µg/m2), a costly-to-treat malodorous compound, were the most abundant compounds and were present in 100 % of samples, irrespective of land use or environmental conditions. Anatoxin-a (8.1 ± 11.6 µg/m2) and saxitoxin (0.18 ± 0.39 µg/m2), while not always detected, showed a systematic tradeoff in their relative importance with season, an observation not previously reported in the literature. Our model indicates that microcystin concentrations were greatest where microcystin-producing genes were present, whereas geosmin concentrations were high in the absence of geosmin-producing genes. Together, these results suggest that benthic mats produce microcystin in situ but that geosmin production may occur ex situ with its presence in mats attributable to adsorption by organic matter. Our study broadens the awareness of benthic cyanobacteria as a source of harmful and nuisance metabolites and highlights the importance of benthic monitoring for sustaining water quality standards in rivers.
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Affiliation(s)
- Zane Rider
- Department of Civil, Environmental and Architectural Engineering, University of Kansas, 2150 Learned Hall, Lawrence, KS 66045, United States
| | - Abigal Percich
- Department of Civil, Environmental and Architectural Engineering, University of Kansas, 2150 Learned Hall, Lawrence, KS 66045, United States
| | - Yasawantha Hiripitiyage
- Department of Civil, Environmental and Architectural Engineering, University of Kansas, 2150 Learned Hall, Lawrence, KS 66045, United States
| | - Ted D Harris
- Kansas Biological Survey, University of Kansas, Lawrence, KS 66045, United States
| | - Belinda S M Sturm
- Department of Civil, Environmental and Architectural Engineering, University of Kansas, 2150 Learned Hall, Lawrence, KS 66045, United States
| | - Alan E Wilson
- School of Fisheries, Aquaculture, and Aquatic Sciences, Auburn University, Auburn, AL 36849, United States
| | - Erik D Pollock
- Stable Isotope Laboratory, University of Arkansas, Fayetteville, AR 72701, United States
| | - John R Beaver
- BSA Environmental Services, Beachwood, OH 44122, United States
| | - Admin Husic
- Department of Civil, Environmental and Architectural Engineering, University of Kansas, 2150 Learned Hall, Lawrence, KS 66045, United States.
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3
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Harris TD, Reinl KL, Azarderakhsh M, Berger SA, Berman MC, Bizic M, Bhattacharya R, Burnet SH, Cianci-Gaskill JA, Domis LNDS, Elfferich I, Ger KA, Grossart HPF, Ibelings BW, Ionescu D, Kouhanestani ZM, Mauch J, McElarney YR, Nava V, North RL, Ogashawara I, Paule-Mercado MCA, Soria-Píriz S, Sun X, Trout-Haney JV, Weyhenmeyer GA, Yokota K, Zhan Q. What makes a cyanobacterial bloom disappear? A review of the abiotic and biotic cyanobacterial bloom loss factors. Harmful Algae 2024; 133:102599. [PMID: 38485445 DOI: 10.1016/j.hal.2024.102599] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 01/31/2024] [Accepted: 02/05/2024] [Indexed: 03/19/2024]
Abstract
Cyanobacterial blooms present substantial challenges to managers and threaten ecological and public health. Although the majority of cyanobacterial bloom research and management focuses on factors that control bloom initiation, duration, toxicity, and geographical extent, relatively little research focuses on the role of loss processes in blooms and how these processes are regulated. Here, we define a loss process in terms of population dynamics as any process that removes cells from a population, thereby decelerating or reducing the development and extent of blooms. We review abiotic (e.g., hydraulic flushing and oxidative stress/UV light) and biotic factors (e.g., allelopathic compounds, infections, grazing, and resting cells/programmed cell death) known to govern bloom loss. We found that the dominant loss processes depend on several system specific factors including cyanobacterial genera-specific traits, in situ physicochemical conditions, and the microbial, phytoplankton, and consumer community composition. We also address loss processes in the context of bloom management and discuss perspectives and challenges in predicting how a changing climate may directly and indirectly affect loss processes on blooms. A deeper understanding of bloom loss processes and their underlying mechanisms may help to mitigate the negative consequences of cyanobacterial blooms and improve current management strategies.
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Affiliation(s)
- Ted D Harris
- Kansas Biological Survey and Center for Ecological Research, University of Kansas, 2101 Constant Ave., Lawrence, KS, 66047
| | - Kaitlin L Reinl
- Lake Superior National Estuarine Research Reserve, University of Wisconsin - Madison Division of Extension, 14 Marina Dr, Superior, WI 54880
| | - Marzi Azarderakhsh
- Department of Construction and Civil Engineering, New York City College of Technology, 300 Jay Street, New York, NY 11201
| | - Stella A Berger
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Zur alten Fischerhütte 2, 16775 Stechlin, Germany
| | - Manuel Castro Berman
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180 and Darrin Freshwater Institute, Rensselaer Polytechnic Institute, Bolton Landing, NY, 12814
| | - Mina Bizic
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Zur alten Fischerhütte 2, 16775 Stechlin, Germany
| | - Ruchi Bhattacharya
- Department of Biological, Geological & Environmental Sciences, Cleveland State University, Cleveland, OH 44115
| | - Sarah H Burnet
- University of Idaho, Fish and Wildlife Sciences, Moscow, ID, USA, 83844
| | - Jacob A Cianci-Gaskill
- Old Woman Creek National Estuarine Research Reserve, Ohio Department of Natural Resources, 2514 Cleveland Rd East, Huron, OH 44839
| | - Lisette N de Senerpont Domis
- Department of Aquatic Ecology, Netherlands Institute of Ecology (NIOO-KNAW), P.O. Box 50, 6708 PB Wageningen, The Netherlands; Department of Water Resources and Pervasive Systems Group, faculty of EEMCS and ITC, University of Twente, The Netherlands
| | - Inge Elfferich
- Cardiff University, Earth and Environmental Sciences, Main Building, Park Place CF10 3AT, Cardiff, UK
| | - K Ali Ger
- Department of Ecology, Center for Biosciences, Universidade Federal do Rio Grande do Norte, R. das Biociencias, Lagoa Nova, Natal, RN, 59078-970, Brazil
| | - Hans-Peter F Grossart
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Zur alten Fischerhütte 2, 16775 Stechlin, Germany; Potsdam University, Institute of Biochemistry and Biology, Maulbeeralle 2, 14469 Potsdam, Germany
| | - Bas W Ibelings
- Department F.-A. Forel for Environmental and Aquatic Sciences, University of Geneva, 66 Blvd Carl Vogt, 1205, Geneva, Switzerland
| | - Danny Ionescu
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Zur alten Fischerhütte 2, 16775 Stechlin, Germany
| | - Zohreh Mazaheri Kouhanestani
- School of Natural Resources, University of Missouri-Columbia, Anheuser-Busch Natural Resources Building, Columbia, MO, 65211-7220
| | - Jonas Mauch
- Department of Community and Ecosystem Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Müggelseedamm 301, 12587 Berlin, Germany
| | - Yvonne R McElarney
- Fisheries and Aquatic Ecosystems, Agri-Food and Biosciences Institute, Belfast, Northern Ireland
| | - Veronica Nava
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza 1, 20126 Milano, MI, Italy.
| | - Rebecca L North
- School of Natural Resources, University of Missouri-Columbia, Anheuser-Busch Natural Resources Building, Columbia, MO, 65211-7220
| | - Igor Ogashawara
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Zur alten Fischerhütte 2, 16775 Stechlin, Germany
| | - Ma Cristina A Paule-Mercado
- Institute of Hydrobiology, Biology Centre of the Czech Academy of Sciences, Na Sádkách 7, České Budějovice 370 05, Czech Republic
| | - Sara Soria-Píriz
- Département des sciences biologiques, Université du Québec à Montréal, 141 Av. du Président-Kennedy, Montréal, QC H2 × 1Y4, Montréal, QC, Canada
| | - Xinyu Sun
- Department of Fisheries and Wildlife, Michigan State University, East Lansing, MI 48824, USA
| | | | - Gesa A Weyhenmeyer
- Department of Ecology and Genetics/Limnology, Uppsala University, Norbyvägen 18D, 75236 Uppsala, Sweden
| | - Kiyoko Yokota
- Biology Department, State University of New York at Oneonta, Oneonta, NY 13820, USA
| | - Qing Zhan
- Department of Aquatic Ecology, Netherlands Institute of Ecology (NIOO-KNAW), P.O. Box 50, 6708 PB Wageningen, The Netherlands
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4
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Nava V, Chandra S, Aherne J, Alfonso MB, Antão-Geraldes AM, Attermeyer K, Bao R, Bartrons M, Berger SA, Biernaczyk M, Bissen R, Brookes JD, Brown D, Cañedo-Argüelles M, Canle M, Capelli C, Carballeira R, Cereijo JL, Chawchai S, Christensen ST, Christoffersen KS, de Eyto E, Delgado J, Dornan TN, Doubek JP, Dusaucy J, Erina O, Ersoy Z, Feuchtmayr H, Frezzotti ML, Galafassi S, Gateuille D, Gonçalves V, Grossart HP, Hamilton DP, Harris TD, Kangur K, Kankılıç GB, Kessler R, Kiel C, Krynak EM, Leiva-Presa À, Lepori F, Matias MG, Matsuzaki SIS, McElarney Y, Messyasz B, Mitchell M, Mlambo MC, Motitsoe SN, Nandini S, Orlandi V, Owens C, Özkundakci D, Pinnow S, Pociecha A, Raposeiro PM, Rõõm EI, Rotta F, Salmaso N, Sarma SSS, Sartirana D, Scordo F, Sibomana C, Siewert D, Stepanowska K, Tavşanoğlu ÜN, Tereshina M, Thompson J, Tolotti M, Valois A, Verburg P, Welsh B, Wesolek B, Weyhenmeyer GA, Wu N, Zawisza E, Zink L, Leoni B. Plastic debris in lakes and reservoirs. Nature 2023; 619:317-322. [PMID: 37438590 DOI: 10.1038/s41586-023-06168-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 05/04/2023] [Indexed: 07/14/2023]
Abstract
Plastic debris is thought to be widespread in freshwater ecosystems globally1. However, a lack of comprehensive and comparable data makes rigorous assessment of its distribution challenging2,3. Here we present a standardized cross-national survey that assesses the abundance and type of plastic debris (>250 μm) in freshwater ecosystems. We sample surface waters of 38 lakes and reservoirs, distributed across gradients of geographical position and limnological attributes, with the aim to identify factors associated with an increased observation of plastics. We find plastic debris in all studied lakes and reservoirs, suggesting that these ecosystems play a key role in the plastic-pollution cycle. Our results indicate that two types of lakes are particularly vulnerable to plastic contamination: lakes and reservoirs in densely populated and urbanized areas and large lakes and reservoirs with elevated deposition areas, long water-retention times and high levels of anthropogenic influence. Plastic concentrations vary widely among lakes; in the most polluted, concentrations reach or even exceed those reported in the subtropical oceanic gyres, marine areas collecting large amounts of debris4. Our findings highlight the importance of including lakes and reservoirs when addressing plastic pollution, in the context of pollution management and for the continued provision of lake ecosystem services.
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Affiliation(s)
- Veronica Nava
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milan, Italy.
| | - Sudeep Chandra
- Global Water Center, Department of Biology, University of Nevada, Reno, NV, USA
- Department of Biology, University of Nevada, Reno, NV, USA
| | - Julian Aherne
- School of the Environment, Trent University, Peterborough, Canada
| | - María B Alfonso
- Research Institute for Applied Mechanics, Kyushu University, Fukuoka, Japan
| | - Ana M Antão-Geraldes
- Centro de Investigação de Montanha (CIMO), Instituto Politécnico de Bragança, 5300-253 Bragança, Portugal
- Laboratório Associado para a Sustentabilidade e Tecnologia em Regiões de Montanha (SusTEC), Instituto Politécnico de Bragança, 5300-253 Bragança, Portugal
| | - Katrin Attermeyer
- WasserCluster Lunz - Biologische Station, Lunz am See, Austria
- Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria
| | - Roberto Bao
- Centro Interdisciplinar de Química e Bioloxía (CICA), GRICA Group, University of A Coruña, A Coruña, Spain
| | - Mireia Bartrons
- Aquatic Ecology Group, University of Vic - Central University of Catalonia, Vic, Spain
| | - Stella A Berger
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Stechlin, Germany
| | - Marcin Biernaczyk
- Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology, Szczecin, Poland
| | - Raphael Bissen
- Department of Mining and Petroleum Engineering, Chulalongkorn University, Bangkok, Thailand
| | - Justin D Brookes
- School of Biological Sciences, University of Adelaide, North Terrace, Adelaide, Australia
| | - David Brown
- Department of Environmental Data, Horizons Regional Council, Palmerston North, New Zealand
| | - Miguel Cañedo-Argüelles
- Institute of Environmental Assessment and Water Research (IDAEA-CSIC), FEHM-Lab, Barcelona, Spain
| | - Moisés Canle
- Cátedra EMALCSA-UDC, React! Group, Faculty of Sciences & CICA, University of A Coruña, A Coruña, Spain
| | - Camilla Capelli
- Institute of Earth Sciences, University of Applied Sciences and Arts of Southern Switzerland (SUPSI), Mendrisio, Switzerland
| | - Rafael Carballeira
- Centro Interdisciplinar de Química e Bioloxía (CICA), GRICA Group, University of A Coruña, A Coruña, Spain
- Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, Valencia, Spain
| | - José Luis Cereijo
- Water and Environmental Engineering Group, University of A Coruña, A Coruña, Spain
| | | | | | | | | | - Jorge Delgado
- Water and Environmental Engineering Group, University of A Coruña, A Coruña, Spain
| | - Tyler N Dornan
- School of Biological Sciences, University of Adelaide, North Terrace, Adelaide, Australia
| | - Jonathan P Doubek
- School of Natural Resources & Environment, Lake Superior State University, Sault Sainte Marie, MI, USA
- Center for Freshwater Research and Education, Lake Superior State University, Sault Sainte Marie, MI, USA
| | - Julia Dusaucy
- Savoie Mont Blanc University, CNRS, Université Grenoble Alpes, EDYTEM, Chambéry, France
| | - Oxana Erina
- Department of Hydrology, Lomonosov Moscow State University, Moscow, Russia
- Faculty of Biotechnology and Fisheries, Moscow State University of Technologies and Management (FCU), Moscow, Russia
| | - Zeynep Ersoy
- FEHM-Lab (Freshwater Ecology, Hydrology and Management), Departament de Biologia Evolutiva, Ecologia i Ciències Ambientals, Facultat de Biologia, Universitat de Barcelona (UB), Barcelona, Spain
- Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona (UB), Barcelona, Spain
- Rui Nabeiro Biodiversity Chair, Mediterranean Institute for Agriculture, Environment and Development (MED), Universidade de Évora, Évora, Portugal
| | - Heidrun Feuchtmayr
- Lake Ecosystems Group, UK Centre for Ecology & Hydrology, Lancaster, United Kingdom
| | - Maria Luce Frezzotti
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milan, Italy
| | - Silvia Galafassi
- Water Research Institute, National Research Council, Verbania, Italy
| | - David Gateuille
- Savoie Mont Blanc University, CNRS, Université Grenoble Alpes, EDYTEM, Chambéry, France
| | - Vitor Gonçalves
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, BIOPOLIS Program in Genomics, Biodiversity and Land Planning; UNESCO Chair - Land Within Sea: Biodiversity & Sustainability in Atlantic Islands, Universidade dos Açores, Ponta Delgada, São Miguel, Açores, Portugal
- Institute of Biochemistry and Biology, Potsdam University, Potsdam, Germany
| | - Hans-Peter Grossart
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Stechlin, Germany
- Institute of Biochemistry and Biology, Potsdam University, Potsdam, Germany
| | - David P Hamilton
- Australian Rivers Institute, Griffith University, Nathan, Queensland, Australia
| | - Ted D Harris
- Kansas Biological Survey & Center for Ecological Research, University of Kansas, Lawrence, KS, USA
| | - Külli Kangur
- Estonian University of Life Sciences, Tartu, Estonia
| | | | - Rebecca Kessler
- Kansas Biological Survey & Center for Ecological Research, University of Kansas, Lawrence, KS, USA
| | - Christine Kiel
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Stechlin, Germany
| | - Edward M Krynak
- Global Water Center, Department of Biology, University of Nevada, Reno, NV, USA
- Department of Biology, University of Nevada, Reno, NV, USA
| | - Àngels Leiva-Presa
- Aquatic Ecology Group, University of Vic - Central University of Catalonia, Vic, Spain
| | - Fabio Lepori
- Institute of Earth Sciences, University of Applied Sciences and Arts of Southern Switzerland (SUPSI), Mendrisio, Switzerland
| | - Miguel G Matias
- Rui Nabeiro Biodiversity Chair, Mediterranean Institute for Agriculture, Environment and Development (MED), Universidade de Évora, Évora, Portugal
- Museo Nacional de Ciencias Naturales, CSIC, Madrid, Spain
| | | | - Yvonne McElarney
- Fisheries and Aquatic Ecosystems, Agri-Food and Biosciences Institute, Belfast, Northern Ireland
| | - Beata Messyasz
- Department of Hydrobiology, Institute of Environmental Biology, Adam Mickiewicz University, Poznań, Poland
| | - Mark Mitchell
- Department of Science and Innovation, Horizons Regional Council, Palmerston North, New Zealand
| | - Musa C Mlambo
- Department of Freshwater Invertebrates, Albany Museum, Grahamstown, South Africa
| | - Samuel N Motitsoe
- Department of Zoology and Entomology, Rhodes University, Grahamstown, South Africa
| | - Sarma Nandini
- FES Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Mexico
| | - Valentina Orlandi
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milan, Italy
| | - Caroline Owens
- Department of Ecology, Evolution, and Marine Biology, University of California, Santa Barbara, Santa Barbara, CA, USA
| | - Deniz Özkundakci
- Environmental Research Institute - Te Pūtahi Rangahau Taiao, The University of Waikato, Hamilton, New Zealand
| | - Solvig Pinnow
- Department of Plankton and Microbial Ecology, Leibniz Institute of Freshwater Ecology and Inland Fisheries, Stechlin, Germany
| | - Agnieszka Pociecha
- Department of Freshwater Biology, Institute of Nature Conservation, Polish Academy of Sciences, Kraków, Poland
| | - Pedro Miguel Raposeiro
- CIBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, InBIO Laboratório Associado, BIOPOLIS Program in Genomics, Biodiversity and Land Planning; UNESCO Chair - Land Within Sea: Biodiversity & Sustainability in Atlantic Islands, Universidade dos Açores, Ponta Delgada, São Miguel, Açores, Portugal
- Faculdade de Ciências e Tecnologias, Universidade dos Açores, Ponta Delgada, Portugal
| | - Eva-Ingrid Rõõm
- Institute of Agricultural and Environmental Sciences, Estonian University of Life Sciences, Tartu, Estonia
| | - Federica Rotta
- Institute of Earth Sciences, University of Applied Sciences and Arts of Southern Switzerland (SUPSI), Mendrisio, Switzerland
| | - Nico Salmaso
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Italy
| | - S S S Sarma
- FES Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Mexico
| | - Davide Sartirana
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milan, Italy
| | - Facundo Scordo
- Instituto Argentino de Oceanografía, Universidad Nacional del Sur (UNS)-CONICET, Bahía Blanca, Argentina
- Departamento de Geografía y Turismo, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Claver Sibomana
- Center of Research in Natural and Environmental Sciences, University of Burundi, Bujumbura, Burundi
| | | | - Katarzyna Stepanowska
- Faculty of Food Sciences and Fisheries, West Pomeranian University of Technology, Szczecin, Poland
| | | | - Maria Tereshina
- Department of Hydrology, Lomonosov Moscow State University, Moscow, Russia
| | - James Thompson
- Fisheries and Aquatic Ecosystems, Agri-Food and Biosciences Institute, Belfast, Northern Ireland
- School of Geography and Environmental Sciences, Ulster University, Coleraine, Northern Ireland
| | - Monica Tolotti
- Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Italy
| | - Amanda Valois
- National Institute of Water and Atmospheric Research, Freshwater Ecology, Hamilton and Wellington, New Zealand
| | - Piet Verburg
- National Institute of Water and Atmospheric Research, Freshwater Ecology, Hamilton, New Zealand
| | - Brittany Welsh
- School of the Environment, Trent University, Peterborough, Canada
| | - Brian Wesolek
- Biological Services Department, Bay Mills Indian Community, Brimley, MI, USA
| | - Gesa A Weyhenmeyer
- Department of Ecology and Genetics, Limnology Group, Uppsala University, Uppsala, Sweden
| | - Naicheng Wu
- Department of Geography and Spatial Information Techniques, Ningbo University, Ningbo, China
| | - Edyta Zawisza
- Institute of Geological Sciences, Polish Academy of Sciences, Warsaw, Poland
| | - Lauren Zink
- Department of Biological Sciences, University of Lethbridge, Lethbridge, Alberta, Canada
| | - Barbara Leoni
- Department of Earth and Environmental Sciences, University of Milano-Bicocca, Milan, Italy
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5
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Reinl KL, Harris TD, Elfferich I, Coker A, Zhan Q, De Senerpont Domis LN, Morales-Williams AM, Bhattacharya R, Grossart HP, North RL, Sweetman JN. The role of organic nutrients in structuring freshwater phytoplankton communities in a rapidly changing world. Water Res 2022; 219:118573. [PMID: 35643062 DOI: 10.1016/j.watres.2022.118573] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 02/09/2022] [Revised: 04/27/2022] [Accepted: 05/07/2022] [Indexed: 06/15/2023]
Abstract
Carbon, nitrogen, and phosphorus are critical macroelements in freshwater systems. Historically, researchers and managers have focused on inorganic forms, based on the premise that the organic pool was not available for direct uptake by phytoplankton. We now know that phytoplankton can tap the organic nutrient pool through a number of mechanisms including direct uptake, enzymatic hydrolysis, mixotrophy, and through symbiotic relationships with microbial communities. In this review, we explore these mechanisms considering current and projected future anthropogenically-driven changes to freshwater systems. In particular, we focus on how naturally- and anthropogenically- derived organic nutrients can influence phytoplankton community structure. We also synthesize knowledge gaps regarding phytoplankton physiology and the potential challenges of nutrient management in an organically dynamic and anthropogenically modified world. Our review provides a basis for exploring these topics and suggests several avenues for future work on the relation between organic nutrients and eutrophication and their ecological implications in freshwater systems.
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Affiliation(s)
- Kaitlin L Reinl
- Lake Superior National Estuarine Research Reserve, University of Wisconsin-Madison Division of Extension, 14 Marina Drive, Superior, Wisconsin 54880, US; University of Wisconsin-Madison, Center for Limnology, 608 N. Park St., Madison, WI, US; University of Minnesota-Duluth, Large Lakes Observatory, 2205 E. 5th St., Duluth, MN, US.
| | - Ted D Harris
- Kansas Biological Survey and Center for Ecological Research, 2101 Constant Ave., Lawrence, KS, US
| | - Inge Elfferich
- Cardiff University, Earth and Environmental Sciences, Main Building, Park Place CF10 3AT, Cardiff, UK
| | - Ayooluwateso Coker
- University of Minnesota-Duluth, Large Lakes Observatory, 2205 E. 5th St., Duluth, MN, US
| | - Qing Zhan
- Netherlands Institute of Ecology, Dept. of Aquatic Ecology, Droevendaalsesteeg 10, Wageningen, NL
| | | | - Ana M Morales-Williams
- University of Vermont, Rubenstein School of Environment and Natural Resources, 81 Carrigan Drive, Burlington, VT, US
| | - Ruchi Bhattacharya
- University of Waterloo, Department of Earth and Environmental Sciences, 200 University Ave., N2L 1V6, Waterloo, ON, CA
| | - Hans-Peter Grossart
- Leibniz Institute for Freshwater Ecology and Inland Fisheries (IGB), Dept. Plankton and Microbial Ecology, Zur alten Fischerhuette 2, D-16775 Stechlin, DE; Potsdam University, Institute of Biochemistry and Biology, Maulbeerallee 2, 14469 Potsdam
| | - Rebecca L North
- University of Missouri-Columbia, School of Natural Resources, 303L Anheuser Busch Natural Resource Building, Columbia, MO, US
| | - Jon N Sweetman
- Pennsylvania State University, Ecological Science and Management, 457 Agriculture Sciences and Industries Building, State College, PA, US
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Xiao M, Burford MA, Wood SA, Aubriot L, Ibelings BW, Prentice MJ, Galvanese EF, Harris TD, Hamilton DP. Schindler's legacy: from eutrophic lakes to the phosphorus utilization strategies of cyanobacteria. FEMS Microbiol Rev 2022; 46:6617595. [PMID: 35749580 PMCID: PMC9629505 DOI: 10.1093/femsre/fuac029] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 06/01/2022] [Accepted: 06/22/2022] [Indexed: 01/09/2023] Open
Abstract
David Schindler and his colleagues pioneered studies in the 1970s on the role of phosphorus in stimulating cyanobacterial blooms in North American lakes. Our understanding of the nuances of phosphorus utilization by cyanobacteria has evolved since that time. We review the phosphorus utilization strategies used by cyanobacteria, such as use of organic forms, alternation between passive and active uptake, and luxury storage. While many aspects of physiological responses to phosphorus of cyanobacteria have been measured, our understanding of the critical processes that drive species diversity, adaptation and competition remains limited. We identify persistent critical knowledge gaps, particularly on the adaptation of cyanobacteria to low nutrient concentrations. We propose that traditional discipline-specific studies be adapted and expanded to encompass innovative new methodologies and take advantage of interdisciplinary opportunities among physiologists, molecular biologists, and modellers, to advance our understanding and prediction of toxic cyanobacteria, and ultimately to mitigate the occurrence of blooms.
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Affiliation(s)
- Man Xiao
- Corresponding author: Nanjing Institute of Geography & Limnology, Chinese Academy of Sciences, Nanjing, Jiangsu, China. E-mail:
| | - Michele A Burford
- Australian Rivers Institute, Griffith University, Nathan, QLD 4111, Australia
| | - Susanna A Wood
- Coastal and Freshwater Group, Cawthron Institute, Nelson, 7010, New Zealand
| | - Luis Aubriot
- Phytoplankton Physiology and Ecology Group, Sección Limnología, Instituto de Ecología y Ciencias Ambientales, Facultad de Ciencias; Universidad de la República, Montevideo, 11400, Uruguay
| | - Bas W Ibelings
- Department F.-A. Forel for Aquatic and Environmental Sciences and Institute for Environmental Sciences, University of Geneva, Geneva, 1290, Switzerland
| | - Matthew J Prentice
- Australian Rivers Institute, Griffith University, Nathan, QLD 4111, Australia
| | - Elena F Galvanese
- Laboratório de Análise e Síntese em Biodiversidade, Departamento de Botânica, Setor de Ciências Biológicas, Universidade Federal do Paraná, Curitiba-PR, 81531-998, Brazil,Programa de Pós-graduação em Ecologia e Conservação, Setor de Ciências Biológicas, Universidade Federal do Paraná, Curitiba-PR, 80060-140, Brazil
| | - Ted D Harris
- Kansas Biological Survey and Center for Ecological Research, Lawrence, KS, 66047, United States
| | - David P Hamilton
- Australian Rivers Institute, Griffith University, Nathan, QLD 4111, Australia
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Liu H, Zheng ZC, Young B, Harris TD. Three-dimensional numerical modeling of the cyanobacterium Microcystis transport and its population dynamics in a large freshwater reservoir. Ecol Modell 2019. [DOI: 10.1016/j.ecolmodel.2019.01.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Kelty ML, Morris W, Gallagher AT, Anderson JS, Brown KA, Mirkin CA, Harris TD. High-throughput synthesis and characterization of nanocrystalline porphyrinic zirconium metal-organic frameworks. Chem Commun (Camb) 2018; 52:7854-7. [PMID: 27247981 DOI: 10.1039/c6cc03264h] [Citation(s) in RCA: 52] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
We describe and employ a high-throughput screening method to accelerate the synthesis and identification of pure-phase, nanocrystalline metal-organic frameworks (MOFs). We demonstrate the efficacy of this method through its application to a series of porphyrinic zirconium MOFs, resulting in the isolation of MOF-525, MOF-545, and PCN-223 on the nanoscale.
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Affiliation(s)
- M L Kelty
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA.
| | - W Morris
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA.
| | - A T Gallagher
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA.
| | - J S Anderson
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA.
| | - K A Brown
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA. and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA
| | - C A Mirkin
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA. and International Institute for Nanotechnology, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA and Department of Materials Science and Engineering, Northwestern University, 2220 Campus Drive, Evanston, IL 60208, USA
| | - T D Harris
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208, USA.
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Lahoutte T, Vanhove C, Caveliers V, Defrise M, Everaert H, Bossuyt A, Franken PR, Schäfers KP, Kriens M, Barnard C, Schober O, Schäfers M, Kopka K, Wagner S, Law MP, Riemann B, Pike VW, Herrero P, Dence CS, Kisrieva-Ware Z, Eisenbeis P, Welch MJ, Gropler RJ, Bucerius J, Joe AY, Schmaliohann J, Gündisch D, Reinhardt MJ, Biersack HJ, Wüllner U, Ranney DF, Peshock RM, McDonald GG, Slomka PJ, deKemp RA, Beanlands RSB, Nishina H, Abidov A, Berman DS, Germano G, Riou LM, Goode AR, Hatada K, Ruiz M, Lima R, Harris TD, Beller GA, Glover DK, Kim H, Miceli MH, Delbeke D, Bhargava P, Jackson LBJ, Walker RC, Anaissie E, Alavi A, Hanrahan SM, Janabi M, Taylor SE, Rychak JJ, Klibanov AL, Leppanen A, Cummings RD, Ley K, Rychak JJ, Klibanov AL, Hossack J, Dence CS, Herrero P, Gropler RJ, Welch MJ, Veress AI, Feng B, Yang Y, Weiss JA, Huesman RH, Gullberg GT, Sharp TL, Herrero P, Englebach JA, Fettig NM, Gropler RJ, Welch MJ, Dobrucki LW, Hua J, Bourke BN, Sadeghi MM, Cavaliere P, Mendizabal M, VanRoyen N, Buschmann IR, Sinusas AJ, Sadeghi MM, Zhang J, Fassaei HR, Krassilnikova S, Esmailzadeh L, Gharaei AA, Kooshkabadi A, Edwards DS, Harris TD, Yalamanchili P, Sinusas AJ, Zaret BL, Bender JR, Epstein FH, Gilson WD, Sureau FC, Yang Z, French BA, Lewis S, Lu XE, Tom EM, Felix MM, Gretton JE, Varghese RP, Wagner WR, Villanueva FS. Abstracts of Original Contributions Cardiovascular Molecular Imaging Symposium May 3–4, 2004 Bethesda, Maryland. J Nucl Cardiol 2004. [DOI: 10.1007/bf02972758] [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: 10/21/2022]
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Brouwers AH, Laverman P, Boerman OC, Oyen WJ, Barrett JA, Harris TD, Edwards DS, Corstens FH. A 99Tcm-labelled leukotriene B4 receptor antagonist for scintigraphic detection of infection in rabbits. Nucl Med Commun 2000; 21:1043-50. [PMID: 11192710 DOI: 10.1097/00006231-200011000-00010] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [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: 11/25/2022]
Abstract
In a search for a rapid and accurate imaging agent for scintigraphic detection of infection and inflammation, an LTB4 receptor antagonist, 99Tcm-RP517, which contains the hydrazino nicotinamide moiety, has been developed recently. To study the in vivo behaviour of 99Tcm-RP517, rabbits with Escherichia coli infection were injected intravenously with 99Tcm-RP517. Gamma camera images were obtained and ex vivo bio-distribution was determined at several hours post-injection (p.i.). In a separate set of rabbits the choledochal duct was cannulated to quantitatively monitor the hepatobiliary clearance of the radiopharmaceutical. The receptor binding fraction of the radiolabelled RP517 exceeded 70%. Accumulation of 99Tcm-RP517 in the abscess was visualized as early as 1 h p.i. Due to rapid blood clearance (t1/2 alpha=18+/-0.6 min, t1/2 beta=6.5+/-0.4 h) and high abscess uptake, the abscess-to-muscle ratios increased with time from 7.0+/-2.3 at 1 h p.i. to 44.3+/-4.6 at 20 h p.i. The agent mainly cleared via the hepatobiliary route: 50% of the radiolabel was recovered in the small bowel at 1 h p.i., whereas 85% was found in cecum and sigmoid at 20 h p.i. In conclusion, 99Tcm-RP517 rapidly visualized E. coli abscesses in rabbits. The agent rapidly cleared from the blood, mainly via the hepatobiliary route. High abscess-to-background ratios were achieved. The accumulation in the intestines could limit the applicability of this agent for detecting infectious processes in the abdominal area. The development of a more hydrophilic analogue of 99Tcm-RP517 could improve the clinical applicability of this agent.
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Affiliation(s)
- A H Brouwers
- Department of Nuclear Medicine, University Medical Center Nijmegen, The Netherlands.
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Harris TD, Sworin M, Williams N, Rajopadhye M, Damphousse PR, Glowacka D, Poirier MJ, Yu K. Synthesis of stable hydrazones of a hydrazinonicotinyl-modified peptide for the preparation of 99mTc-labeled radiopharmaceuticals. Bioconjug Chem 1999; 10:808-14. [PMID: 10502347 DOI: 10.1021/bc9900237] [Citation(s) in RCA: 48] [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: 11/30/2022]
Abstract
Hydrazones of a 6-hydrazinonicotinyl-modified cyclic peptide IIb/IIIa receptor antagonist were prepared in order to protect the hydrazine moiety from reaction with trace aldehyde and ketone impurities encountered during the process of manufacturing and compounding lyophilized kits used in radiolabeling with (99m)Tc. Hydrazones were prepared by either a direct reaction of the 6-hydrazinonicotinyl-modified cyclic peptide with carbonyl compounds or by conjugation of the cyclic peptide with hydrazones of succinimidyl 6-hydrazinonicotinate. Stability of the hydrazones was evaluated by treatment with formaldehyde. Hydrazones derived from simple aliphatic aldehydes underwent an exchange reaction with formaldehyde, while hydrazones of aromatic aldehydes and ketones provided the greatest level of stability when challenged with formaldehyde. We have been successful in protecting 6-hydrazinonicotinyl-modified cyclic peptides from reacting with formaldehyde, while still allowing sufficient reactivity for radiolabeling with (99m)Tc. The hydrazones of succinimidyl 6-hydrazinonicotinate are convenient and general reagents for forming 6-hydrazinonicotinyl conjugates with amino-functionalized bioactive molecules.
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Affiliation(s)
- T D Harris
- DuPont Pharmaceutical Co., 331 Treble Cove Road, North Billerica, Massachusetts 01862, and Upsher-Smith Laboratories, Inc., 14905 23rd Avenue North, Minneapolis, Minnesota 55447, USA.
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12
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Grober RD, Rutherford T, Harris TD. Modal approximation for the electromagnetic field of a near-field optical probe. Appl Opt 1996; 35:3488-3495. [PMID: 21102739 DOI: 10.1364/ao.35.003488] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
A formalism is given in which the optical field generated by a near-field optical aperture is described as an analytic expansion over a complete set of optical modes. This vectoral solution preserves the divergent behavior of the near field and the dipolar nature of the far field. Numerical calculation of the fields requires only evaluation of a well behaved, one-dimensional integral. The formalism is directly applicable to experiments in near-field scanning optical microscopy when relatively flat samples are evaluated.
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13
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Schuppler S, Friedman SL, Marcus MA, Adler DL, Xie Y, Ross FM, Chabal YJ, Harris TD, Brus LE, Brown WL, Chaban EE, Szajowski PF, Christman SB, Citrin PH. Size, shape, and composition of luminescent species in oxidized Si nanocrystals and H-passivated porous Si. Phys Rev B Condens Matter 1995; 52:4910-4925. [PMID: 9981675 DOI: 10.1103/physrevb.52.4910] [Citation(s) in RCA: 130] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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Abstract
Luminescent centers with sharp (<0.07 millielectron volt), spectrally distinct emission lines were imaged in a GaAs/AIGaAs quantum well by means of low-temperature near-field scanning optical microscopy. Temperature, magnetic field, and linewidth measurements establish that these centers arise from excitons laterally localized at interface fluctuations. For sufficiently narrow wells, virtually all emission originates from such centers. Near-field microscopy/spectroscopy provides a means to access energies and homogeneous line widths for the individual eigenstates of these centers, and thus opens a rich area of physics involving quantum resolved systems.
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Schuppler S, Friedman SL, Marcus MA, Adler DL, Xie Y, Ross FM, Harris TD, Brown WL, Chabal YJ, Brus LE, Citrin PH. Dimensions of luminescent oxidized and porous silicon structures. Phys Rev Lett 1994; 72:2648-2651. [PMID: 10055937 DOI: 10.1103/physrevlett.72.2648] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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16
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Hines MA, Chabal YJ, Harris TD, Harris AL. Raman studies of steric hindrance and surface relaxation of stepped H-terminated silicon surfaces. Phys Rev Lett 1993; 71:2280-2283. [PMID: 10054633 DOI: 10.1103/physrevlett.71.2280] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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17
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Betzig E, Trautman JK, Weiner JS, Harris TD, Wolfe R. Polarization contrast in near-field scanning optical microscopy. Appl Opt 1992; 31:4563-8. [PMID: 20725460 DOI: 10.1364/ao.31.004563] [Citation(s) in RCA: 30] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Recent advances in probe design have led to enhanced resolution (currently as significant as ~ 12 nm) in optical microscopes based on near-field imaging. We demonstrate that the polarization of emitted and detected light in such microscopes can be manipulated sensitively to generate contrast. We show that the contrast on certain patterns is consistent with a simple interpretation of the requisite boundary conditions, whereas in other cases a more complicated interaction between the probe and the sample is involved. Finally application of the technique to near-filed magneto-optic imaging is demonstrated.
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Abstract
In near-field scanning optical microscopy, a light source or detector with dimensions less than the wavelength (lambda) is placed in close proximity (lambda/50) to a sample to generate images with resolution better than the diffraction limit. A near-field probe has been developed that yields a resolution of approximately 12 nm ( approximately lambda/43) and signals approximately 10(4)- to 10(6)-fold larger than those reported previously. In addition, image contrast is demonstrated to be highly polarization dependent. With these probes, near-field microscopy appears poised to fulfill its promise by combining the power of optical characterization methods with nanometric spatial resolution.
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Abstract
A novel signal amplification method, catalyzed reporter deposition (CARD), and its application to immunoassays is described. The method involves utilizing an analyte-dependent reporter enzyme (ADRE) to catalyze the deposition of additional reporter on the surface in a solid-phase immunoassay. In the examples described, deposition of reporter is facilitated by using a horseradish peroxidase (HRP) ADRE to catalyze the deposition of biotin labeled phenols. The deposited biotins are then reacted with streptavidin-labeled enzyme, thereby resulting in deposition of enzyme. Using the ADRE to catalyze the deposition of additional enzyme results in an amplification of the signal of the ADRE alone and improves the detection limit of the assay. The method is highly sensitive, simple, flexible, and easy to implement.
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Affiliation(s)
- M N Bobrow
- Medical Products Department, E.I. Du Pont De Nemours & Co., North Billerica, MA 01862
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Sauer R, Harris TD, Tsang WT. Tunneling-controlled photoluminescence in nonresonantly coupled single quantum wells. Phys Rev B Condens Matter 1989; 39:12929-12932. [PMID: 9948174 DOI: 10.1103/physrevb.39.12929] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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21
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Schubert EF, Harris TD, Cunningham JE, Jan W. Multisubband photoluminescence in sawtooth doping superlattices. Phys Rev B Condens Matter 1989; 39:11011-11015. [PMID: 9947914 DOI: 10.1103/physrevb.39.11011] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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22
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Schubert EF, Ullrich B, Harris TD, Cunningham JE. Quantum-confined interband absorption in GaAs sawtooth-doping superlattices. Phys Rev B Condens Matter 1988; 38:8305-8308. [PMID: 9945585 DOI: 10.1103/physrevb.38.8305] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Sauer R, Harris TD, Tsang WT. Spectroscopy of excited states in In0.53Ga0.47 As-InP single quantum wells grown by chemical-beam epitaxy. Phys Rev B Condens Matter 1986; 34:9023-9026. [PMID: 9939647 DOI: 10.1103/physrevb.34.9023] [Citation(s) in RCA: 35] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Skolnick MS, Tu CW, Harris TD. High-resolution spectroscopy of defect-bound excitons and acceptors in GaAs grown by molecular-beam epitaxy. Phys Rev B Condens Matter 1986; 33:8468-8474. [PMID: 9938245 DOI: 10.1103/physrevb.33.8468] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
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Abstract
Stereoradiographs have been used on occasion for three-dimensional reconstruction and measurement of objects in radiology and radiotherapy. The lack of a good stereoradiographic technique has limited the uses of steroradiographic exposures. In this paper, the principle of the double-image is outlined and a method of applying this principle to stereoradiographic exposures is developed. A computer program has been developed from geometrical considerations to analyze the stereobronchogram and to calculate the dimensions of the objects in question. The applications of this technique are discussed and its use in evaluating lung casts is described.
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