Mark D. Johnson

ORCID: 0000-0002-0460-945X
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About
Contact & Profiles
Research Areas
  • Environmental DNA in Biodiversity Studies
  • Species Distribution and Climate Change
  • Microbial Community Ecology and Physiology
  • Plant Pathogens and Resistance
  • Identification and Quantification in Food
  • Protist diversity and phylogeny
  • Photochemistry and Electron Transfer Studies
  • Various Chemistry Research Topics
  • Axon Guidance and Neuronal Signaling
  • MicroRNA in disease regulation
  • Advanced Chemical Sensor Technologies
  • Analytical Chemistry and Sensors
  • Circular RNAs in diseases
  • Molecular Junctions and Nanostructures
  • Environmental remediation with nanomaterials
  • Respiratory Support and Mechanisms
  • Coastal wetland ecosystem dynamics
  • Digital and Traditional Archives Management
  • Cancer Mechanisms and Therapy
  • Arsenic contamination and mitigation
  • RNA and protein synthesis mechanisms
  • Photodynamic Therapy Research Studies
  • Spectroscopy and Quantum Chemical Studies
  • Water Quality and Resources Studies
  • Soil Moisture and Remote Sensing

University of Illinois Urbana-Champaign
2023-2025

Illinois Archaeological Survey
2025

Construction Engineering Research Laboratory
2023-2024

U.S. Army Engineer Research and Development Center
2023-2024

United States Department of the Army
2024

Brigham and Women's Hospital
1989-2023

Harvard University
1989-2023

Texas Tech University
2019-2023

Neurological Surgery
2023

Dana-Farber Brigham Cancer Center
2023

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTA connection between intramolecular long-range electron, hole, and triplet energy transfersGerhard L. Closs, Mark D. Johnson, John R. Miller, Piotr PiotrowiakCite this: J. Am. Chem. Soc. 1989, 111, 10, 3751–3753Publication Date (Print):May 1, 1989Publication History Published online1 May 2002Published inissue 1 1989https://pubs.acs.org/doi/10.1021/ja00192a044https://doi.org/10.1021/ja00192a044research-articleACS PublicationsRequest reuse...

10.1021/ja00192a044 article EN Journal of the American Chemical Society 1989-05-01

Abstract Analysis of environmental DNA (eDNA) from passively collected airborne dust has demonstrated broad success for sensitive and robust detection plants. Recent experiments at small spatial scales have suggested that animals can also be detected using eDNA. However, eDNA analysis never been used a long‐term whole‐community assessment natural terrestrial community or with passive collectors. We conducted metabarcoding survey targeting vertebrate carried in the air on an approximately...

10.1002/edn3.388 article EN cc-by-nc-nd Environmental DNA 2023-01-20

Abstract Arthropods can strongly impact ecosystems through pollination, herbivory, predation, and parasitism. As such, characterizing arthropod biodiversity is vital to understanding ecosystem health, functions, services. Emerging environmental DNA (eDNA) methods targeting trace eDNA left behind on flowers have the potential track interactions. The goal of this study was determine extent which metabarcoding identify plant‐arthropod arthropod‐arthropod interactions assess compared...

10.1002/edn3.411 article EN cc-by-nc-nd Environmental DNA 2023-03-29

ADVERTISEMENT RETURN TO ISSUEArticleNEXTDistance dependence of intramolecular hole and electron transfer in organic radical ionsMark D. Johnson, John R. Miller, Nancy S. Green, Gerhard L. ClossCite this: J. Phys. Chem. 1989, 93, 4, 1173–1176Publication Date (Print):February 1, 1989Publication History Published online1 May 2002Published inissue 1 February 1989https://pubs.acs.org/doi/10.1021/j100341a001https://doi.org/10.1021/j100341a001research-articleACS PublicationsRequest reuse...

10.1021/j100341a001 article EN The Journal of Physical Chemistry 1989-02-01

Abstract Background Airborne environmental DNA (eDNA) research is an emerging field that focuses on the detection of species from their genetic remnants in air. The majority studies into airborne eDNA plants has until now either focused single detection, specifically only pollen, or human health impacts, with no previous surveying entire plant community through metabarcoding. We therefore conducted metabarcoding survey and compared results to a traditional survey. Results Over course year,...

10.1186/s12862-021-01947-x article EN cc-by BMC Ecology and Evolution 2021-12-06

Abstract Airborne environmental DNA (eDNA) research has typically focused on the detection of pollen from anemophilous terrestrial plant species; however, recent findings have expanded definition airborne eDNA to include a variety sources, such as leaf and flower fragments. While methods for capturing are well studied, there is less known about how best analyze capture more broadly defined bulk samples. Therefore, this study aimed identify efficient techniques extraction amplification these...

10.1002/edn3.19 article EN cc-by-nc-nd Environmental DNA 2019-06-19

Genetic analysis of airborne plant material has historically focused (generally implicitly rather than as a stated goal) on pollen from anemophilous (wind-pollinated) species, such in multiple studies examining the relationship allergens to human health. Inspired by recent influx literature applying environmental DNA (eDNA) approaches targeted-species and whole-ecosystem study, we conducted proof-of-concept experiment determine whether samples reliably detect genetic non-anemophilous species...

10.1371/journal.pone.0225262 article EN cc-by PLoS ONE 2019-11-20

ABSTRACT Aim Freshwater mussels are considered among the most at‐risk taxa in world. As such, comprehensive monitoring assessments of what abiotic and biotic factors influence mussel occupancy will be vital for guiding effective conservation. Here, we analysed vertebrate environmental DNA (eDNA) metabarcoding data to explore (i.e., host fish diversity, predator presence, community composition) drainage size, forest cover, stream order) on freshwater populations. Location This study utilised...

10.1111/ddi.70008 article EN cc-by Diversity and Distributions 2025-03-01

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTNucleic acid-related compounds. 58. Periodinane oxidation, selective primary deprotection, and remarkably stereoselective reduction of tert-butyldimethylsilyl-protected ribonucleosides. Synthesis 9-(.beta.-D-xylofuranosyl)adenine or 3'-deuterioadenosine from adenosineMorris J. Robins, Vicente Samano, Mark D. JohnsonCite this: Org. Chem. 1990, 55, 2, 410–412Publication Date (Print):January 1, 1990Publication History Published online1 May...

10.1021/jo00289a004 article EN The Journal of Organic Chemistry 1990-01-01

Abstract Analysis of environmental DNA (eDNA) has been successfully used across freshwater ecological parasitology to inform management ecologically and economically important species. However, most studies have species‐specific quantitative polymerase chain reaction (qPCR) assays detect target taxa. While generally effective, this approach limits the amount community management‐supporting data that can be obtained from eDNA samples. If metabarcoding could conducted with same accuracy a...

10.1002/ece3.11382 article EN cc-by Ecology and Evolution 2024-05-01

Abstract Detecting environmental DNA (eDNA) of numerous organisms from the same samples has been revolutionized by metabarcoding. However, utilizing vast amounts data generated metabarcoding to predict occupancy probabilities for co‐occurring species is currently rare. Here, we demonstrate how can be used advance community ecology research through a case study using replicate stream water and Bayesian models test hypotheses eDNA occurrence native fish (brook trout, Salvelinus fontinalis ),...

10.1002/edn3.579 article EN cc-by Environmental DNA 2024-05-01

Sevarino, Feme B. MD; Johnson, Mark D. Lema, J. MD, PhD; Datta, Sanjay Ostheimer, Gerard W. Naulty, Steven MD Author Information

10.1213/00000539-198904000-00021 article EN Anesthesia & Analgesia 1989-04-01

Abstract Objective Gill lice Salmincola spp. are among the most widely reported parasites of freshwater salmonids and have been associated with recent declines in native Brook Trout Salvelinus fontinalis populations. Effective gill surveillance is vital for salmonid conservation success, but current survey approaches often inadequate or problematic. We developed an environmental DNA (eDNA)‐based approach to detect louse edwardsii explored viability this as a management tool rapid,...

10.1002/tafs.10439 article EN cc-by Transactions of the American Fisheries Society 2023-10-25

Algal 14 C uptake and bacterial 3 H leucine incorporation were measured over 20 months to assess the influence of macrophytes on spatial distribution magnitude microbial production relative importance algae versus whole‐system energy flow in a southeastern U.S. wetland. determined for water column plant‐, sediment‐, wood‐surface microhabitats four zones defined by aquatic vascular plant composition: no macrophyte, floating leaved ( Nymphaea odorata ), heterophyllous Proserpinaca palustris or...

10.4319/lo.2003.48.3.1101 article EN Limnology and Oceanography 2003-05-01

A polymer film, which incorporates phenothiazine as the chromophore, has been developed a personnel dosimeter for long wave ultraviolet radiation. It is stable, reproducible and particularly suited to monitoring doses received by patients undergoing photochemotherapy psoriasis.

10.1111/j.1365-2133.1977.tb15056.x article EN British Journal of Dermatology 1977-08-01

Recent research on environmental DNA (eDNA), genetic material shed by organisms into their environment that can be used for sensitive and species-specific detection, has focused the ability to collect airborne eDNA released plants carried wind use in terrestrial plant populations, including detection of invasive endangered species. Another possible application is detect changes communities response activity or a landscape-scale. Therefore, goal this study was demonstrate how honey mesquite,...

10.3389/fenvs.2020.563431 article EN cc-by Frontiers in Environmental Science 2021-01-25

This paper examines the practical limitations in using xenon flash lamps for direct photolysis of organic compounds air. Due to Cl• atom chain reactions, higher chlorinated ethenes photolyze rapidly enough compete with catalytic thermal oxidation. However, many common cocontaminants photooxidize slowly, limiting applications. The chloroethene chains can be inhibited by some cosolutes, but also sensitize oxidation cocontaminants. Trichloroethene (TCE) photolyzes give a >90% initial yield...

10.1021/es950047y article EN Environmental Science & Technology 1996-01-01

10.1016/s0169-8141(00)00058-5 article EN International Journal of Industrial Ergonomics 2001-05-01

Environmental DNA (eDNA) and RNA (eRNA) metabarcoding has become a popular tool for assessing biodiversity from environmental samples, but inconsistent documentation of methods, data metadata makes results difficult to reproduce synthesise. A working group scientists have collaborated produce set minimum reporting guidelines the constituent steps workflows, physical layout laboratories through archiving. We emphasise how suite should adhere findable, accessible, interoperable reproducible...

10.3897/mbmg.8.128689 article EN cc-by Metabarcoding and Metagenomics 2024-12-30
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