Geographic Mosaic
Mostrando 13-24 de 28 artigos, teses e dissertações.
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13. Caracterização e mapeamento da vegetação da região da Floresta Nacional de Tapajós através de dados óticos, de radar e inventários florestais / Vegetation characterization and mapping of Tapajós national forest region through optico, radar and forest inventory data
The Tapajós National Forest (FNT) has been observed by several remote sensor types, for many years. As one of the main study sites of the Large Scale Biosphere-Atmosphere Experiment in Amazonia (LBA) project, the FNT has been object of several remote sensing campaigns. However, the papers that have tried to integrate the information originating from the mul
Publicado em: 2003
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14. Distribuição do maracanã-verdadeiro Primolius maracana (psittacidae): preferência de hábitat e fatores que influenciam na manutenção de sua populações remanescentes. / Distribution of blue-winged macaw primolius maracanã: habitat preferences and factors affecting the persistence of its remaining populations.
The blue-winged macaw is a vulnerable psittacidae, which has been suffering a rapid reduction of its populations in different parts of its occurrence. Thus, it was carried a detailed revision on the, historical and current, distribution and estatus of the species through using literature and specimens in museums data. We gathered 176 records of blue-winged m
Publicado em: 2003
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15. Analysis of accelerated erosion processes using aerial photographs and GIS: Rio Bonito basin (Descalvado, SP). / Análise de processos de erosão celerada, com base em fotografias aéreas e geoprocessamento: Bacia do Rio Bonito (Descalvado, SP).
Este trabalho relata a metodologia adotada para organização das informações do meio abiótico, relativas à caracterização de processos erosivos visíveis em fotografias aéreas, com a finalidade de contribuir em ações de planejamento da bacia de drenagem do Rio Bonito, sub-bacia do Rio Mogi-guaçu, no município de Descalvado-SP, Brasil. A área de
Publicado em: 2002
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16. Lobular pattern of choriocapillaris in pre-eclampsia with aldosteronism.
We report a case of geographic or mosaic pattern yellowish opaque foci in the left eye of a 36-year-old woman who suffered from severe pre-eclampsia. Though the geographic lesions resulted in chorioretinal atrophy, the mosaic lesion led to no significant atrophy. These two findings were both diagnosed as manifestations of choroidal ischaemia, the former due
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17. Multitasking in Replication Is Common among Geminiviruses
Geminiviruses package single-stranded circular DNA and replicate via double-stranded DNA intermediates. During the past decade, increasing evidence has led to the general acceptance that their replication follows a rolling-circle replication mechanism like bacteriophages with single-stranded DNA. In a recent study, we showed that this is also true for Abutil
American Society for Microbiology.
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18. Haplotypes That Are Mosaic for Wild-Type and T Complex-Specific Alleles in Wild Mice
Two outstanding problems pertaining to the population dynamics and evolution of the t complex in mice concern the frequency of t haplotypes in the wild and the degree to which these haplotypes recombine with their wild-type homologs. To address these problems, the frequency and distribution of several t complex-associated restriction fragment variants in wil
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19. Mosaic organization and heterogeneity in frequency of allelic recombination of the Plasmodium vivax merozoite surface protein-1 locus
The organization and allelic recombination of the merozoite surface protein-1 gene of Plasmodium vivax (PvMsp-1), the most widely prevalent human malaria parasite, were evaluated in complete nucleotide sequences of 40 isolates from various geographic areas. Alignment of 31 distinct alleles revealed the mosaic organization of PvMsp-1, consisting of seven inte
National Academy of Sciences.
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20. Genetic characterization of new West African simian immunodeficiency virus SIVsm: geographic clustering of household-derived SIV strains with human immunodeficiency virus type 2 subtypes and genetically diverse viruses from a single feral sooty mangabey troop.
It has been proposed that human immunodeficiency virus type 2 (HIV-2) originated from simian immunodeficiency viruses (SIVs) that are natural infections of sooty mangabeys (Cercocebus torquatus atys). To test this hypothesis, SIVs from eight sooty mangabeys, including six new viruses from West Africa, were genetically characterized. gag and env sequences sho
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21. Chemical phenotype matching between a plant and its insect herbivore
Two potential outcomes of a coevolutionary interaction are an escalating arms race and stable cycling. The general expectation has been that arms races predominate in cases of polygenic inheritance of resistance traits and permanent cycling predominates in cases in which resistance is controlled by major genes. In the interaction between Depressaria pastinac
The National Academy of Sciences.
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22. Primate postcrania from the late middle Eocene of Myanmar
Fossil primates have been known from the late middle to late Eocene Pondaung Formation of Myanmar since the description of Pondaungia cotteri in 1927. Three additional primate taxa, Amphipithecus mogaungensis, Bahinia pondaungensis and Myanmarpithecus yarshensis, were subsequently described. These primates are represented mostly by fragmentary dental and cra
The National Academy of Sciences.
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23. Historical demography of Müllerian mimicry in the neotropical Heliconius butterflies
We compare the historical demographies of two Müllerian comimetic butterfly species: Heliconius erato and Heliconius melpomene. These species show an extensive parallel geographic divergence in their aposematic wing phenotypes. Recent studies suggest that this coincident mosaic results from simultaneous demographic processes shaped by extrinsic forces over
National Academy of Sciences.
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24. Characterization of a Novel Simian Immunodeficiency Virus with a vpu Gene from Greater Spot-Nosed Monkeys (Cercopithecus nictitans) Provides New Insights into Simian/Human Immunodeficiency Virus Phylogeny
In the present study, we describe a new simian immunodeficiency virus (SIV), designated SIVgsn, naturally infecting greater spot-nosed monkeys (Cercopithecus nictitans) in Cameroon. Together with SIVsyk, SIVgsn represents the second virus isolated from a monkey belonging to the Cercopithecus mitis group of the Cercopithecus genus. Full-length genome sequence
American Society for Microbiology.