D. J. Mitchell

ORCID: 0000-0001-8868-1848
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About
Contact & Profiles
Research Areas
  • Advanced ceramic materials synthesis
  • Plant Pathogens and Resistance
  • Plant Pathogens and Fungal Diseases
  • Plant Disease Management Techniques
  • Tribology and Wear Analysis
  • Plant Disease Resistance and Genetics
  • Metal and Thin Film Mechanics
  • Advanced materials and composites
  • Mycorrhizal Fungi and Plant Interactions
  • Entomopathogenic Microorganisms in Pest Control
  • Nematode management and characterization studies
  • Mechanical stress and fatigue analysis
  • Metal Alloys Wear and Properties
  • Semiconductor materials and devices
  • Additive Manufacturing and 3D Printing Technologies
  • Composting and Vermicomposting Techniques
  • Nuclear Materials and Properties
  • Lubricants and Their Additives
  • Fungal Biology and Applications
  • Gut microbiota and health
  • Agronomic Practices and Intercropping Systems
  • Plant Pathogenic Bacteria Studies
  • Microtubule and mitosis dynamics
  • Probiotics and Fermented Foods
  • Cellular transport and secretion

Oak Ridge National Laboratory
1999-2024

Office of Scientific and Technical Information
2024

Physical Sciences (United States)
2019-2021

College of Saint Benedict and Saint John's University
2020

Saint Joseph Seminary College
2020

St. John's University
2020

Loyola Marymount University
2020

Ministry of Law and Justice
2020

University of Virginia
2012-2015

James Madison University
2009

10.1016/j.jeurceramsoc.2021.05.055 article EN publisher-specific-oa Journal of the European Ceramic Society 2021-05-30

Background.Citrobacter rodentium is a naturally occurring murine pathogen that causes colonic epithelialcell hyperplasia, disrupts the mucosa, and elicits predominantly T helper 1 cellular immune response; it thereby serves as model for study of mechanisms disease induced by human attaching-effacing pathogens. We sought to determine whether pretreatment mice with mixture Lactobacillus rhamnosus L. acidophilus probiotics would attenuate C. rodentium—induced in mice. Methods. Mice were...

10.1086/430318 article EN The Journal of Infectious Diseases 2005-05-20

The retrograde transport of Trk-containing endosomes from the axon to cell body by cytoplasmic dynein is necessary for axonal and neuronal survival. We investigated recruitment signaling in rat embryonic neurons PC12 cells. identified a novel phosphoserine on intermediate chains (ICs), we observed time-dependent neurotrophin-stimulated increase chain phosphorylation this site both types. Pharmacological studies, overexpression constitutively active MAP kinase kinase, an vitro assay with...

10.1523/jneurosci.5599-11.2012 article EN cc-by-nc-sa Journal of Neuroscience 2012-10-31

The beta-ketoadipate pathway of Acinetobacter calcoaceticus comprises two parallel metabolic branches. One branch, mediated by six enzymes encoded the cat genes, converts catechol to succinate and acetyl coenzyme A (acetyl-CoA); other catalyzed products pca protocatechuate acetyl-CoA reactions analogous or identical those sequence. We used expression plasmid pUC18 construct libraries DNA from an A. mutant strain which genes had been deleted. Immunological screening with antiserum pcaE gene...

10.1128/jb.169.7.3168-3174.1987 article EN Journal of Bacteriology 1987-07-01

An additive manufacturing process for fabricating ceramic matrix composites has been developed based on the C/C-SiC system. Automated fiber placement of continuous carbon fibers in a polyether ether ketone was performed to consolidate into printed preform. Pyrolysis convert polymer porous carbon, and then Si introduced by reactive melt infiltration portion silicon carbide. The densities microstructures were characterized after each step during processing, mechanical properties measured....

10.3390/jcs6120359 article EN Journal of Composites Science 2022-11-23

Most citrus nurseries and orchards in Florida are infested with Phytophthora nicotianae, the causal agent of root rot. Although fungicides control disease increase seedling growth tree yields, they not always economically or environmentally sustainable. Amendment soils composted municipal waste (CMW) may provide an alternative to for management. Citrus decreased increasing proportions one CMW source, indicating potential phytotoxicity from soluble salts acetic acid when proportion soil...

10.1094/pdis.1998.82.6.683 article EN other-oa Plant Disease 1998-06-01

The ribosomal internal transcribed spacer 1 region was sequenced for 10 species of Pythium and eight Phytophthora. Alignment the sequences revealed considerable sequence microheterogeneity, which utilized to prepare a capture probe unique each species. probes were tested by PCR ELISA, combining sensitivity specificity polymerase chain reaction (PCR) enzyme-linked immunosorbent assay (ELISA). entirely specific, enabling detection identification amplified DNA from individual cultures or mixed...

10.1111/j.1574-6968.2002.tb11044.x article EN FEMS Microbiology Letters 2002-02-01

The effects of soil solarization with or without cabbage leaf amendments on the survival Phytophthora spp. were evaluated in several North Florida soils. Soil temperature under treatments reached a maximum 47°C at 10-cm depth, but only 41°C 25 cm. Solarization clear, gas-impermeable film was as effective methyl bromide reducing populations P. nicotianae depth had no effect Populations capsici after either low-density polyethylene similar to treatment while 25-cm reduction observed....

10.1094/pdis.1999.83.3.293 article EN other-oa Plant Disease 1999-03-01

Ten species of Pythium and a group isolates that produced filamentous sporangia but did not form sexual structures (Pythium ‘group F’) were recovered from the root systems fresh market bell pepper plants grown on polyethylene-mulched production in Florida. Pathogenicity tests using pasteurized field soil inoculated with infested wheat seed demonstrated P. aphanidermatum, myriotylum, helicoides, splendens can cause significant rot reductions growth pepper. aphanidermatum myriotylum caused...

10.1094/pdis.2000.84.12.1271 article EN other-oa Plant Disease 2000-12-01

Abstract This study focuses on the computational thermodynamic analysis of chemical vapor deposition (CVD) SiC from methyltrichlorosilane‐hydrogen (MTS‐H 2 ) using up‐to‐date databases. High‐resolution computation has been performed with fine intervals temperature and pressure at various H /MTS ratios interest to systematically investigate condition range (800 1600°C, 0 26 664 Pa, 0.1 100) guide experimental exploration. The influence parameters compositions phase stabilities deposit gas...

10.1111/jace.17742 article EN Journal of the American Ceramic Society 2021-02-20

The oversummer survival of Colletotrichum gloeosporioides in strawberry crown tissue under field conditions was investigated 1998 and 1999. Strawberry crowns infected naturally with C. were placed inside cloth bags containing soil, buried the at 5 or 13 cm, then recovered over 6 months each year. plated onto a spp. semiselective medium speciated by colony, spore morphology, molecular markers species-specific DNA primers. Pathogenicity selected isolates confirmed greenhouse bioassays on...

10.1094/pdis.2001.85.7.750 article EN other-oa Plant Disease 2001-07-01

Transcriptional changes of the enzyme nitric oxide synthase I (NOS1) are believed to play a role in development many diseases. The gene for NOS1 has 12 alternative first exons (1A-1L). 1F exon is one most highly utilized brain and polymorphism ((TG)(m)TA(TG)(n)) located its promoter region. polymorphism's length been suggested affect transcription Parkinson's disease (PD); however, actual influence on not studied. To better characterize links with PD, genotyping study was done comparing...

10.1002/jnr.22045 article EN Journal of Neuroscience Research 2009-03-26

The potential for compostcd municipal solid waste (CMW) to suppress Phytophthora root rot and promote growth of Sunburst tangerine trees on Sun Chu Sha rootstock was evaluated in orchard soils infested with nicotianae not this pathogen. planting site one-year-old treated two sources CMW by either incorporating the into backfill at time (20 percent v/v) or applying it as a mulch soil surface tons/ha). Controls were CMW. One source increased rate tree trunks over 1.5 years compared controls,...

10.1080/1065657x.1999.10701959 article EN Compost Science & Utilization 1999-03-01
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