Washington State University

Pullman, Washington, United States

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School of Mechanical and Materials Engineering
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School of Electrical Engineering and Computer Science
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Department of Crop and Soil Sciences
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    ABSTRACT: Bulk-rock major-and trace-element composition, pehogaphy and mineral compositiolts are presented for a diverse suite of 22 prirn/.nve mafic lavas in the Cascade Range of northem Oregon and southern washington. ivltl tne exception of an early Western Cascade basalt, all the rocks are younger than 7 Ma Intensive parumeters lfGt2O),f(O2),T, pl for rhe magnas have been inferred mostly from equilibrium olivine-liquid and plagioclas€-liquid relations. Nearly anhydrous, MoRB-Ule, low-K tholeiite was probably derived from relatively high degreei ofdecompression-induced melting of sha[ow, depleted relatively qmetasomalze{ lithospheric mantle during intra-arc rifting. The degree of partial melting dJcreases northward along the ari, whereas the depth of average melt generation increases. OIB-like basalt reprJsents deeper, wetter, smallerdegree melts of more enriched asthenospheric mantle, unaffected by subduction. Olivine analcimite resembles the silicate melt considered resoonsible for within-plate mantle metasomatism. Post-7-Ma subduction-related basalt was derived by low degrees of partial milt"g of subduction-metasomatized gamet therzolite, similar to OIB-like basalt source-mantle beiore modification. The spectrum of subduction-related basalt from cooler and wetter (and stghtly more oxidized) absarokite to progressively hotter and drier high-K calc-alkaline basalt and calc-elkaline basalt seems to be due to varying degrees of metasomatism of the deep mantle wedgl by relatively cool, wet" ULE-ich absarokitic magmas coming from near the suMucted slab. Early Westem Cascade basalt is nore typically arc-like in is composilo1 and nineralogy, and was probably generatedunderHzO-riih conditions when more vigorous |ub{uction prevailed. Depleted basaltic andesite may have been generated by low degrees of partial melting of residual harzburgite' possibly formed during the generation of early westem cascade basalt.
    01/2019; 35:367-396.
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    ABSTRACT: Pentalonia nigronervosa (sensu Hardy 1931) samples from banana and from Zingiberaceae and Araceae species exhibit fixed differences in DNA sequence in mitochondrial cytochrome oxidase subunit 1 ("DNA barcode") and in the nuclear gene elongation factor 1α, and have morphometric differences, including non-overlapping ranges in the length of the distal rostral segment. It is thus proposed that the name P. nigronervosa Coquerel be restricted to banana-feeding 'nigronervosa' specimens, and that the name Pentalonia caladii van der Goot be restored to full species status for specimens typically feeding on Zingiberaceae and Araceae.
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    ABSTRACT: Leukotoxin-producing Mannheimia haemolytica consistently causes fatal pneumonia in bighorn sheep (BHS) under experimental conditions. Surprisingly, by culture methods, it has been isolated from pneumonic BHS lungs less frequently than other bacteria. However, in one study PCR assays detected M. haemolytica from over 70% of the pneumonic lung samples that were negative for this organism by culture, suggesting that the growth of M. haemolytica is inhibited by other bacteria. Previously, we have shown that Bibersteinia trehalosi inhibits the growth of M. haemolytica. Herein we report that 100% of a diverse panel of B. trehalosi isolates (n = 55) tested in a bacterial competition assay inhibited the growth of M. haemolytica, suggesting that the inhibitory phenotype is conserved. Further, no plasmids were isolated from any of the 30 B. trehalosi isolates tested, suggesting that the effectors are chromosomally-encoded. An earlier study by us showed that Pasteurella multocida also inhibits the growth of M. haemolytica. However, M. haemolytica has not been isolated even from pneumonic BHS lungs that did not carry B. trehalosi or P. multocida. Consequently, we tested Staphylococcus spp., Streptococcus spp., and Escherichia coli, the bacteria that have been detected frequently in pneumonic BHS lungs, for possible inhibition of M. haemolytica. Neither the Staphylococcus spp. nor the Streptococcus sp. strains inhibited the growth of M. haemolytica. E. coli inhibited the growth of M. haemolytica by a proximity-dependent mechanism. Growth inhibition of M. haemolytica by several bacterial species is likely to contribute to the infrequent detection of this bacterium from pneumonic BHS lungs by culture
    Veterinary Microbiology 08/2014;


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    100 Grimes Way, 99164, Pullman, Washington, United States
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International Journal of Hospitality Management. 01/2008;
Journal of Advanced Nursing 10/2008; 63(6):540-9.

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