918 resultados para Bronze bug


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At head of title: New national edition.

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A collection of miscellaneous pamphlets.

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Added title pages, engraved.

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U.S. Olympic team, 1984, 1988, 1992, bronze medal in 3000 meter steeplechase, 1984

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Tree before 1858; boulder ca. 1883; bronze plaque 1904. In spring of 1858 the Class of 1858 named this oak (growing near center of campus) the Tappan Oak as a tribute to then Pres. Henry P. Tappan). Stone was given by the "Tappan Boys" (class of 58) and placed ca. 1883. Plaque created in 1904. Photograph is crumbled and creased.

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Tree before 1858; boulder ca. 1883; bronze plaque 1904. In spring of 1858 the Class of 1858 named this oak (growing near center of campus) the Tappan Oak as a tribute to then Pres. Henry P. Tappan). Stone was given by the "Tappan Boys" (class of 58) and placed ca. 1883.

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[Malchow (center) silver medalist in 200 meter butterfly at Atlanta games with gold medalist Denis Pankratov (Russia) and bronze medalist Scott Goodman (Australia.).

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L-R: Marilyn Ramenofsky (silver), Virginia Duenkel (gold), Teri Stickles (bronze)]

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Vols. 1-4 are reissues of the four volumes of the edition of 1830.

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Originally pub. under title "Svenska fornsaker" in 1871.

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Strontium isotope analysis of skeletal material as a means to reconstruct prehistoric residential patterns has previously mainly been applied to populations with terrestrial diets. Here we present a model for populations with mixed marine/terrestrial diets, which is based on two-component mixing of strontium isotopes. Applying this model, we can estimate the original strontium isotope value of the terrestrial component of the diet. Accordingly it is possible to identify non-local individuals even if they had a mixed marine/terrestrial diet. The model is applied to tooth enamel samples representing nine individuals recovered from a passage grave in Resmo, on the island of Öland in the Baltic Sea, where at least five non-local individuals, representing at least two different geographical regions of origin, were identified. Non-local individuals were more frequent during the Bronze Age than during previous phases.

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The aim of this study has been to revaluate Bronze Age society using rock art as an archaeological material. It has also sought to question certain prevailing interpretative trends within the research of rock art; ascribing it as ritual practices, expression of a social elite and the adoption of symbols from cultures along the Mediterranean Sea. This has chiefly been made possible through the application of Slavoj Žižeks ideas about the ideological fantasy and the sublime object of ideology. The thesis proposes a connection between art and ideology. A selected sampling of rock carvings from three areas in Sweden has been made in order to further investigate the relationship between different figurative motives both at a regional level, as well as a local. This study claims that rather than having been under the control of an elite, rock art has been accessible for the majority of the population both to produce and view. The depiction of human representation as rock carving does not depict a clear social stratification. It is also argued that the idea of images displayed on the rocks having roots in the imagery of Mediterranean civilizations is a construct of current western ideology, as the symbolic connection between the cultures is tenable at best, according to this study. 

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Pyrrhacoricin is a naturally occurring antimicrobial peptide from the European fire bug Pyrrhocoris apterus. It has submicromolar activity against a range of Gram-negative bacterial strains and has created recent interest as a lead for the development of novel antibiotic compounds. In this study, we have used NMR spectroscopy to determine the solution structures of pyrrhocoricin and a synthetic macrocyclic derivative that has improved in vivo pharmaceutical properties. Native pyrrhocoricin is largely disordered in solution, but there is evidence of a subpopulation with ordered turn regions over residues 2-5, 4-7, and 16-19. The macrocyclic derivative incorporates a nine amino acid linker joining the N- and C-termini, which does not adversely affect the antimicrobial potency but leads to a broader spectrum of activity. The NMR data suggest that the turn conformations in the cyclic derivative are similar to those in the native form, thus implicating them in the biological function. (C) 2004 Wiley Periodicals, Inc.

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1 The herbivorous bug Heteropsylla cubana Crawford (Homoptera: Psyllidae) is a pest of the cattle fodder crop Leucaena (Leguminosae: Mimosoideae). The interaction between the psyllid and three varieties of its Leucaena host plant was investigated in relation to the apparent resistance of some Leucaena varieties (Leucaena leucocephala, Leucaena pallida and their hybrids) to attack. 2 Field trials demonstrated that adult psyllids distinguished among the different varieties of Leucaena over a distance, and were attracted to L. leucocephala in significantly higher numbers than to L. pallida or to the hybrid. Pesticide treatment increased the attractiveness of Leucaena plants, even of those deemed to be psyllid resistant. Numbers of psyllid eggs and nymphs, sampled in the field, reflect the arrival rates of adults at the three plant varieties. 3 Wavelength reflectance data of the three Leucaena varieties were not significantly different from one another, suggesting that psyllids cannot discriminate among the three plants using brightness or wavelength cues. There was a differential release of caryophyllene among the three varieties. Release of caryophyllene in L. leucocephala and the hybrid appeared to be influenced by environmental conditions. 4 Experiments demonstrated that caryophyllene (at least on its own) did not influence the behaviour of leucaena psyllids in relation to leucaena plants. 5 The results suggest that host plant volatiles cannot be dismissed as significant in the interaction between the leucaena psyllid and its Leucaena host plants. Further avenues for investigation are recommended and these are related to novel ways of understanding resistance in insect plant inter-relationships.

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The increased demographic performance of biological invaders may often depend on their escape from specifically adapted enemies. Here we report that native taxa in colonized regions may swiftly evolve to exploit such emancipated exotic species because of selection caused by invaders. A native Australian true bug has expanded it host range to include a vine imported from tropical America that has become a serious environmental weed. Based on field comparisons and historical museum specimens, we show that over the past 30-40 years, seed feeding soapberry bugs have evolved 5-10% longer mouthparts, better suited to attack the forest-invading balloon vines, which have large fruits. Laboratory experiments show that these differences are genetically based, and result in a near-doubling of the rate at which seeds are attacked. Thus a native biota that initially permits invasion may rapidly respond in ways that ultimately facilitate control.