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  1. Article: Vegetative Compatibility and Seasonal Variation Among Isolates of Sclerotinia homoeocarpa.

    Powell, J F / Vargas, J M

    Plant disease

    2019  Volume 85, Issue 4, Page(s) 377–381

    Abstract: Dollar spot of amenity turf, caused by Sclerotinia homoeocarpa, occurs in two seasonal epidemics in the northern United States, one from May to late July and a second from mid-August through October. It is not known whether these seasonal epidemics are ... ...

    Abstract Dollar spot of amenity turf, caused by Sclerotinia homoeocarpa, occurs in two seasonal epidemics in the northern United States, one from May to late July and a second from mid-August through October. It is not known whether these seasonal epidemics are the result of multiple species or due to seasonal variation within a single species. Isolates of S. homoeocarpa were collected from dollar spot lesions obtained from golf courses in Michigan, Illinois, and Wisconsin. Vegetative compatibility reactions between isolates identified six vegetative compatibility groups (VCGs) among more than 1,300 isolates collected from the eight locations. Most VCGs were present throughout the season, but one was generally recovered only in the late epidemic. Sequences of the nuclear ribosomal internal transcribed spacer 1 (ITS1) were identical among VCGs, indicating that the VCGs represent a single species. The results of this study suggest that the seasonal dollar spot epidemics observed in the northern United States are caused by a single species.
    Language English
    Publishing date 2019-03-04
    Publishing country United States
    Document type Journal Article
    ZDB-ID 754182-x
    ISSN 0191-2917
    ISSN 0191-2917
    DOI 10.1094/PDIS.2001.85.4.377
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article: The solubility or distribution coefficient of carbon tetrachloride in water, whole blood, and plasma.

    POWELL, J F

    British journal of industrial medicine

    2010  Volume 2, Page(s) 212–216

    MeSH term(s) Carbon Tetrachloride/toxicity ; Carbon Tetrachloride Poisoning ; Plasma ; Solubility ; Water
    Chemical Substances Water (059QF0KO0R) ; Carbon Tetrachloride (CL2T97X0V0)
    Language English
    Publishing date 2010-10-27
    Publishing country England
    Document type Journal Article
    ZDB-ID 280395-1
    ISSN 0007-1072
    ISSN 0007-1072
    DOI 10.1136/oem.2.4.212
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Erratum: Genomes reveal genetic diversity of Piscine orthoreovirus in farmed and free-ranging salmonids from Canada and USA.

    Siah, A / Breyta, R B / Warheit, K I / Gagne, N / Purcell, M K / Morrison, D / Powell, J F F / Johnson, S C

    Virus evolution

    2021  Volume 7, Issue 1, Page(s) veab008

    Abstract: This corrects the article DOI: 10.1093/ve/veaa054.]. ...

    Abstract [This corrects the article DOI: 10.1093/ve/veaa054.].
    Language English
    Publishing date 2021-06-23
    Publishing country England
    Document type Published Erratum
    ZDB-ID 2818949-8
    ISSN 2057-1577
    ISSN 2057-1577
    DOI 10.1093/ve/veab008
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  4. Article: Management of Dollar Spot on Creeping Bentgrass with Metabolites of Pseudomonas aureofaciens (TX-1).

    Powell, J F / Vargas, J M / Nair, M G / Detweiler, A R / Chandra, A

    Plant disease

    2019  Volume 84, Issue 1, Page(s) 19–24

    Abstract: Antifungal extracts from four strains of bacteria that were selected for their ability to inhibit fungal turfgrass pathogens were compared for in vitro activity. The cell extract from Pseudomonas aureofaciens Tx-1 (ATCC 55670) exhibited the greatest ... ...

    Abstract Antifungal extracts from four strains of bacteria that were selected for their ability to inhibit fungal turfgrass pathogens were compared for in vitro activity. The cell extract from Pseudomonas aureofaciens Tx-1 (ATCC 55670) exhibited the greatest antifungal activity against selected turfgrass pathogens. Purification of the extract yielded a single active component that was identified as phenazine-1 carboxylic acid (PCA). Minimum inhibitory concentrations of PCA to tested fungal pathogens ranged from 10 to 25 µg/ml. In greenhouse studies, PCA provided management of dollar spot on creeping bentgrass equal to that of the commercial fungicides triadimefon and chlorothalonil at equivalent rates of active ingredient. Phytotoxic effects were observed on creeping bentgrass in greenhouse but not field evaluations of PCA at the rate of 0.48 g/m
    Language English
    Publishing date 2019-03-06
    Publishing country United States
    Document type Journal Article
    ZDB-ID 754182-x
    ISSN 0191-2917
    ISSN 0191-2917
    DOI 10.1094/PDIS.2000.84.1.19
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  5. Article: Genomes reveal genetic diversity of Piscine orthoreovirus in farmed and free-ranging salmonids from Canada and USA.

    Siah, A / Breyta, R B / Warheit, K I / Gagne, N / Purcell, M K / Morrison, D / Powell, J F F / Johnson, S C

    Virus evolution

    2020  Volume 6, Issue 2, Page(s) veaa054

    Abstract: Piscine orthoreovirus (PRV-1) is a segmented RNA virus, which is commonly found in salmonids in the Atlantic and Pacific Oceans. PRV-1 causes the heart and skeletal muscle inflammation disease in Atlantic salmon and is associated with several other ... ...

    Abstract Piscine orthoreovirus (PRV-1) is a segmented RNA virus, which is commonly found in salmonids in the Atlantic and Pacific Oceans. PRV-1 causes the heart and skeletal muscle inflammation disease in Atlantic salmon and is associated with several other disease conditions. Previous phylogenetic studies of genome segment 1 (S1) identified four main genogroups of PRV-1 (S1 genogroups I-IV). The goal of the present study was to use Bayesian phylogenetic inference to expand our understanding of the spatial, temporal, and host patterns of PRV-1 from the waters of the northeast Pacific. To that end, we determined the coding genome sequences of fourteen PRV-1 samples that were selected to improve our knowledge of genetic diversity across a broader temporal, geographic, and host range, including the first reported genome sequences from the northwest Atlantic (Eastern Canada). Nucleotide and amino acid sequences of the concatenated genomes and their individual segments revealed that established sequences from the northeast Pacific were monophyletic in all analyses. Bayesian inference phylogenetic trees of S1 sequences using BEAST and MrBayes also found that sequences from the northeast Pacific grouped separately from sequences from other areas. One PRV-1 sample (WCAN_BC17_AS_2017) from an escaped Atlantic salmon, collected in British Columbia but derived from Icelandic broodstock, grouped with other S1 sequences from Iceland. Our concatenated genome and S1 analysis demonstrated that PRV-1 from the northeast Pacific is genetically distinct but descended from PRV-1 from the North Atlantic. However, the analyses were inconclusive as to the timing and exact source of introduction into the northeast Pacific, either from eastern North America or from European waters of the North Atlantic. There was no evidence that PRV-1 was evolving differently between free-ranging Pacific Salmon and farmed Atlantic Salmon. The northeast Pacific PRV-1 sequences fall within genogroup II based on the classification of Garseth, Ekrem, and Biering (Garseth, A. H., Ekrem, T., and Biering, E. (2013) 'Phylogenetic Evidence of Long Distance Dispersal and Transmission of Piscine Reovirus (PRV) between Farmed and Wild Atlantic Salmon',
    Language English
    Publishing date 2020-07-31
    Publishing country England
    Document type Journal Article
    ZDB-ID 2818949-8
    ISSN 2057-1577
    ISSN 2057-1577
    DOI 10.1093/ve/veaa054
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  6. Article: Isolation of dipicolinic acid (pyridine-2:6-dicarboxylic acid) from spores of Bacillus megatherium.

    POWELL, J F

    The Biochemical journal

    2003  Volume 54, Issue 2, Page(s) 210–211

    MeSH term(s) Animals ; Bacillus ; Bacillus megaterium ; Dicarboxylic Acids ; Insecta ; Picolinic Acids ; Pyridines ; Spores, Bacterial
    Chemical Substances Dicarboxylic Acids ; Picolinic Acids ; Pyridines ; pyridine (NH9L3PP67S) ; dipicolinic acid (UE81S5CQ0G)
    Language English
    Publishing date 2003-07-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 2969-5
    ISSN 1470-8728 ; 0264-6021 ; 0006-2936 ; 0306-3275
    ISSN (online) 1470-8728
    ISSN 0264-6021 ; 0006-2936 ; 0306-3275
    DOI 10.1042/bj0540210
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  7. Article ; Online: Vulnerability to depression: what is the role of stress genes in gene x environment interaction?

    El Hage, W / Powell, J F / Surguladze, S A

    Psychological medicine

    2009  Volume 39, Issue 9, Page(s) 1407–1411

    Abstract: Vulnerability to depression has been linked to the interaction of genetic predisposition with stressful life events. This review considers the associations between serotonergic and hypothalamic-pituitary-adrenal (HPA) systems. We follow the standpoint of ...

    Abstract Vulnerability to depression has been linked to the interaction of genetic predisposition with stressful life events. This review considers the associations between serotonergic and hypothalamic-pituitary-adrenal (HPA) systems. We follow the standpoint of a previous Editorial Review (Bhagwagar & Cowen, Psychological Medicine 2008, 38, 307-313) and consider another possible mechanism of vulnerability to depressive disorder, that is we suggest that the gene x environment interaction involves complex participation of serotonergic genes modulating response to stress through the HPA system.
    MeSH term(s) Alleles ; Amygdala/physiopathology ; Arousal/genetics ; Arousal/physiology ; Depressive Disorder, Major/genetics ; Depressive Disorder, Major/physiopathology ; Depressive Disorder, Major/psychology ; Epistasis, Genetic/genetics ; Gene Expression Regulation/genetics ; Genetic Predisposition to Disease/genetics ; Gyrus Cinguli/physiopathology ; Humans ; Hypothalamo-Hypophyseal System/physiopathology ; Life Change Events ; Phenotype ; Pituitary-Adrenal System/physiopathology ; Polymorphism, Genetic/genetics ; Receptors, Glucocorticoid/genetics ; Receptors, Mineralocorticoid/genetics ; Serotonin Plasma Membrane Transport Proteins/genetics ; Social Environment
    Chemical Substances Receptors, Glucocorticoid ; Receptors, Mineralocorticoid ; SLC6A4 protein, human ; Serotonin Plasma Membrane Transport Proteins
    Language English
    Publishing date 2009-09
    Publishing country England
    Document type Editorial ; Research Support, Non-U.S. Gov't ; Review
    ZDB-ID 217420-0
    ISSN 1469-8978 ; 0033-2917
    ISSN (online) 1469-8978
    ISSN 0033-2917
    DOI 10.1017/S0033291709005236
    Database MEDical Literature Analysis and Retrieval System OnLINE

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    Zs.B 1003: Show issues Location:
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  8. Article: Culture clash

    Powell, J.F

    Grounds maintenance. Mar 2001. v. 36 (3)

    2001  

    Keywords lawns and turf ; cultural control ; fertilizers ; mowing ; top dressings ; thatch ; irrigation ; plant growth substances ; disease control ; plant diseases and disorders
    Language English
    Dates of publication 2001-03
    Size p. 17, 20, 22, 24.
    Document type Article
    ISSN 0017-4688
    Database NAL-Catalogue (AGRICOLA)

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  9. Article: Dental evidence for the peopling of the New World: some methodological considerations.

    Powell, J F

    Human biology

    1993  Volume 65, Issue 5, Page(s) 799–819

    Abstract: Turner (1985b) and Greenberg et al. (1986) proposed that New World populations originated in northern Asia and entered the Americas in three migratory waves: Macro-Indian, Aleut-Eskimo, and Na-Dene. Biological support for this model comes from Turner's ... ...

    Abstract Turner (1985b) and Greenberg et al. (1986) proposed that New World populations originated in northern Asia and entered the Americas in three migratory waves: Macro-Indian, Aleut-Eskimo, and Na-Dene. Biological support for this model comes from Turner's unweighted pair group (UPGMA) cluster analysis of discrete dental traits in world populations. Unfortunately, UPGMA analysis often creates suspect clusters and may not be valid as a method for displaying evolutionary relationships because it assumes that rates of evolution are equal among all populations. To test whether Turner's results are an artifact of his analytical method, I analyzed his published data (Turner 1985b) using two alternative techniques that do not assume homogeneous rates of change: a Wagner distance algorithm employing the Fitch-Margoliash criterion for goodness of fit and a maximum parsimony analysis using segment-coded dental trait frequencies. Both alternative methods produce trees that are similar to the UPGMA analysis results, supporting Turner's original results and basic conclusions. Comparisons of tree topology demonstrate that there is strong congruence between trees produced by all three methods, although the placement of certain populations, such as Na-Dene, depends on the method of analysis employed.
    MeSH term(s) Algorithms ; Americas ; Anthropometry ; Archaeology ; Cluster Analysis ; Emigration and Immigration ; Ethnic Groups ; Europe ; Humans ; Phylogeny ; Siberia ; Tooth/anatomy & histology
    Language English
    Publishing date 1993-10
    Publishing country United States
    Document type Journal Article ; Review
    ZDB-ID 1116-2
    ISSN 1534-6617 ; 0018-7143
    ISSN (online) 1534-6617
    ISSN 0018-7143
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  10. Article: Hexosamine-containing peptides in spores of Bacillus subtilis, B. megatherium and B. cereus.

    STRANGE, R E / POWELL, J F

    The Biochemical journal

    2003  Volume 58, Issue 1, Page(s) 80–85

    MeSH term(s) Bacillus ; Bacillus subtilis ; Hexosamines ; Hexoses ; Peptides/metabolism ; Spores, Bacterial
    Chemical Substances Hexosamines ; Hexoses ; Peptides
    Language English
    Publishing date 2003-07-22
    Publishing country England
    Document type Journal Article
    ZDB-ID 2969-5
    ISSN 1470-8728 ; 0264-6021 ; 0006-2936 ; 0306-3275
    ISSN (online) 1470-8728
    ISSN 0264-6021 ; 0006-2936 ; 0306-3275
    DOI 10.1042/bj0580080
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