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  1. An alternative physiological role for the EmhABC efflux pump in Pseudomonas fluorescens cLP6a

    by Adebusuyi, A.A.; Foght, J.M.

    Background Efflux pumps belonging to the resistance-nodulation-division (RND) superfamily in bacteria are involved in antibiotic...

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  2. Alternative Requirements for Vestigial, Scalloped, and Dmef2 during Muscle Differentiation in Drosophila melanogaster

    by Deng, H.; Hughes, S. C.; Bell, J. B.; Simmonds, A. J.

    Abstract: Vertebrate development requires the activity of the myocyte enhancer factor 2 (mef2) gene family for muscle cell...

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  3. Amino acid polymorphisms in strictly conserved domains of a P-type ATPase HMA5 are involved in the mechanism of copper tolerance variation in Arabidopsis

    by Kobayashi, Y.; Kuroda, K.; Kimura, K.; Southron-Francis, J. L.; Furuzawa, A.; Kimura, K.; Iuchi, S.; Kobayashi, M.; Taylor, G. J.; Koyama, H.

    Copper (Cu) is an essential element in plant nutrition, but it inhibits the growth of roots at low concentrations. Accessions...

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  4. Amino Acid Utilization in Seeds of Loblolly Pine during Germination and Early Seedling Growth: I. Arginine and Arginase Activity

    by King, J. E.; Gifford, D. J.

    Abstract: The mobilization and utilization of the major storage proteins in loblolly pine (Pinus taeda L.) seeds following...

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  5. Amplified mitochondrial DNA as a diagnostic marker for species of conifer-feeding Choristoneura (Lepidoptera: Tortricidae)

    by Sperling, F. A. H.; Hickey, D. A.

    Abstract: We describe a method for identifying conifer-feeding species and lineages of Choristoneura Lederer in Canada and...

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  6. Analysis of inhibitors of bacteriophage T4 DNA polymerase

    by Khan, N.N.; Reha-Krantz, L.J.; Wright, G.E.

    Bacteriophage T4 DNA polymerase was Inhibited by butylphenyl nucleotldes, aphldlcolin and pyrophosphate analogs, but with...

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  7. Analysis of the linear determinacy for spread in cooperative models.

    by Weinberger, H.F.; Lewis, M.A.; Li, B.T.

    The discrete-time recursion system \un+1=Q[\un] with \un(x) a vector of population distributions of species and Q an operator...

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  8. Analyzing taphonomic deformation of ankylosaur skulls using retrodeformation and finite element analysis

    by Arbour, V. M.; Currie, P. J.

    Taphonomic deformation can make the interpretation of vertebrate fossil morphology difficult. The effects of taphonomic deformation...

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  9. Anatomically preserved Cycadeoidea (Cycadeoidaceae), with a reevaluation of systematic characters for the seed cones of Bennettitales

    by Rothwell, G.W.; Stockey, R.A.

    Four anatomically preserved ovulate cycadeoid cones have been recovered from three localities in Upper Cretaceous (Turonian/ Coniacian-Late...

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  10. Anatomically Preserved Staminate Inflorescences of Gynoplatananthus oysterbayensis gen. et sp. nov. (Platanaceae) and Associated Pistillate Fructifications from the Eocene of Vancouver Island, British Columbia

    by Mindell, R.A.; Stockey, R.A.; Beard, G.

    Anatomically preserved specimens of globose staminate and pistillate inflorescences belonging to Platanaceae have been found...

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  11. Anatomically Preserved Williamsonia (Williamsoniaceae): Evidence for Bennettitalean Reproduction in the Late Cretaceous of Western North America

    by Stockey, R.A.; Rothwell, G.W.

    An anatomically preserved ovulate cycadeoid cone has been discovered in Upper Cretaceous (Campanian) sediments of Vancouver...

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  12. Anatomy and development of fruits of Lauraceae from the Middle Eocene Princeton Chert

    by Little, S.A.; Stockey, R.A.; Penner, B.

    Investigations of the Middle Eocene Princeton Chert reveal evidence for the connection of lauraceous flowers to fruits through a...

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  13. Ancient vicariance or recent long-distance dispersal? Inferences about phylogeny and South American-African disjunctions in rapateaceae and bromeliaceae based on ndhF sequence data

    by Givnish, T.J.; Millam, K.C.; Evans, T.M.; Hall, J.C.; Pires, J.C.; Berry, P.E.; Sytsma, K.J.

    Rapateaceae and Bromeliaceae each have a center of diversity in South America and a single species native to a sandstone...

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  14. Anemia quatsinoensis sp nov (Schizaeaceae), a permineralized fern from the lower Cretaceous of Vancouver Island.

    by Hernandez-Castillo, G. R.; Stockey, R. A.; Rothwell, G. W.

    Anatomically preserved schizaeaceous vegetative and fertile organs have been identified from the Apple Bay locality (Lower...

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  15. An ankylosaurid dinosaur from Mongolia with in situ armour and keratinous scale impressions

    by Arbour, V. M.; Lech-Hernes, N. L.; Guldberg, T. E.; Hurum, J. H.; Currie, P. J.

    A Mongolian ankylosaurid specimen identified as Tarchia gigantea is an articulated skeleton including dorsal ribs, the sacrum,...

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  16. Annual variation in wild rice (Zizania palustris L.) in Saskatchewan; growth and potential yield

    by Archibold, O. W.; Good, A. G.; Sutherland, J. M.

    Mature wild rice plants collected from 20 sites across northern Saskatchewan over the period 1984-1987 were measured for...

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  17. Antimicrobial activity in the egg wax of the African cattle tick Amblyomma hebraeum (Acari: Ixodidae)

    by Arrieta, M. C.; Leskiw, B. K.; Kaufman, W. R.

    Abstract: Eggs of the tick Amblyomma hebraeum Koch (Acari: Ixodidae) inhibited the growth of Escherichia coli and Serratia...

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  18. Antimicrobial activity in the egg wax of the tick Amblyomma hebraeum (Acari: Ixodidae) is associated with free fatty acids C16:1 and C18:2

    by Yu, Z.; Thomson, E. L. S.; Liu, J.; Dennis, J. J.; Jacobs, R. L.; Kaufman, W. R.

    Abstract: Untreated eggs of the tick Amblyomma hebraeum Koch (Acari: Ixodidae) exhibited antimicrobial activity (AMA) against...

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  19. The APETALA-2-Like Transcription Factor OsAP2-39 Controls Key Interactions between Abscisic Acid and Gibberellin in Rice

    by Yaish, Mahmoud W.; El-kereamy, Ashraf; Zhu, Tong; Beatty, Perrin H.; Good, Allen G.; Bi, Yong-Mei; Rothstein, Steven J.

    The interaction between phytohormones is an important mechanism which controls growth and developmental processes in plants....

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  20. Apparent Survival of Male Ovenbirds in Fragmented and Forested Boreal Landscapes

    by Bayne, E. M.; Hobson, K. A.

    From 1996 to 1999, apparent annual survival of male Ovenbirds (Seiurus aurocapillus) was compared in forest fragments created...

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