Éditeur(s) : Melhoramentos Melhoramentos ( São Paulo )
Résumé : Added sub-title, vol. 1: "Fac-similes dos documentos do Senado da Camara do Rio de Janeiro"; added sub-title, vols.2-5: "Fac-similes da correspondencia recebida pelo Senado da Camara do Rio de Janeiro."
"Collecção do archivo municipal."
"Contribuição da prefeitura do Districto Federal".--cover.
Brazil
Brazil
Rio de Janeiro
Brazil
Brazil

ADE4878
20837304
000615626

Éditeur(s) : HAL CCSD Elsevier
Résumé : Integrated field, LA-MC-ICP-MS geochronology and geochemical data from the Novo Oriente Group have been investigated in order to determine their provenance and possible tectonic setting. This group in the southwestern portion of the Ceara Central Domain, is a well-preserved metavolcanosedimentary sequence, in part exhalative, composed of two distinct formations. The proximal coastal Bonsucesso Formation comprises mainly quartzite and minor basic metavolcanic rocks and is in gradational contact with the distal Caranbas Formation which constitutes a metapelitic-volcanic-carbonate sequence, including metabasic rocks with pillow structure and sheared serpentinized ultrabasic rocks. The youngest detrital zircon found in the quartzite of the Bonsucesso Formation yielded an age of ca. 2.1 Ga and well-defined peaks around 2.2.2.3-2.4 and 2.5 Ga. In addition, zircons from a related metabasalt yielded an upper intercept age of 2083 +/- 28 Ma. We interpret the zircons found in this metabasalt as inherited from the host quartzite. This fact is supported by depleted-mantle Nd model ages (T-DM age) from correlated metabasic and metaultrabasic rocks from other places in the Novo Oriente sequence, which have yielded ages between 1.36 and 1.69 Ga, that is younger than the zircon age obtained in the metabasalt extruded over the Bonsucesso quartzite. Geochemical data of the metasedimentary rocks from the Caraubas Formation indicates a provenance composed of a mixture of felsic and intermediate sources typical of old stable cratons and older continental roots of active tectonic settings. The rocks of the Crania (Medio Coreau Domain) and Bacaja Complexes (southeastern Amazonian Craton) exposed to the west of the Novo Oriente Group, and largely covered by the Phanerozoic Parnaiba intracratonic basin, are the most likely source rocks. Since the precise age of the Novo Oriente Group is not yet well constrained, two distinct settings may be proposed: (1) it may represent a more evolved basin developed from extensional processes during the Mesoproterozoic (ca. 1.5-1.3 Ga); and (2) it could constitute part of the passive margin systems developed during the break-up of the Rodinia crown copyright supercontinent (ca. 0.95-0.8 Ga), associated with a pre-Brasiliano/Pan-African ocean (e.g. Pharusian Ocean). Crown.
ISSN: 1342-937X

hal-00512825
https://hal.archives-ouvertes.fr/hal-00512825
DOI : 10.1016/j.gr.2010.02.001

Éditeur(s) : HAL CCSD Elsevier
Résumé : Guadua sarcocarpa and Guadua weberbaueri (Poaceae: Bambuseae) have a negative influence on tree regeneration and recruitment in bamboo-dominated forests of southwestern Amazonia. The lack of advanced regeneration and sparse canopy in this forest type present a considerable challenge for developing sustainable timber management plans. We conducted field studies in the Porto Dias Agroextractive Settlement Project in Acre, Brazil to assess influences of logging in bamboo-dominated forest sites. Taxonomic composition, stand structure, aboveground biomass, commercial timber volume, and commercial tree seedling and bamboo culm density were compared between five logged vs. unlogged sites in different landholdings, using modified 0.5 ha Gentry plots. No differences in taxonomic composition, aboveground biomass, adult and juvenile stem density, or woody seedling and bamboo culm density were detected between paired logged and unlogged sites. Commercial timber volume, however, was reduced by almost two-thirds in logged plots, suggesting that long-term timber management goals in this forest type are compromised since so few future crop trees remained onsite. Our findings indicate that in order to maximize local management objectives, community forest managers must approach logging in bamboo-dominated forests with caution. We suggest an integration of non-timber forest product extraction with low harvest intensity and low-impact logging, tending of natural regeneration, and diversification of commercial species.
ISSN: 0378-1127

hal-01204213
https://hal.archives-ouvertes.fr/hal-01204213
DOI : 10.1016/j.foreco.2013.12.022
PRODINRA : 263103

Éditeur(s) : HAL CCSD
Résumé : International audience
Fucoxanthin is a carotenoid present in brown micro-and macro algae, that induces apoptosis or autophagy in cancer cells grown in vitro. In vivo studies confirmed its interest as a natural anticancer compound, as it exerts antitumoral, antimetastatic and antiangiogenic activities in animal models. Studies focused on the pharmacology of fucoxanthin in cancer cells and tumors have revealed that it affects a wide panel of cellular, molecular and tissular processes, suggesting that its biological activity may be related in part to a nonspecific integration in cell membranes, and possible interaction with lipid rafts. Thus, preliminary data confirming this interaction of fucoxanthin with lipid rafts were obtained in mast cells and hepatoma WIF-B9 cells. We here discuss this hypothesis, in view of the critical function of lipid rafts in cancer cell survival, invasivity and communication with the tumoral microenvironment.
ISSN: 2141-2294

hal-01391001
https://hal.archives-ouvertes.fr/hal-01391001
https://hal.archives-ouvertes.fr/hal-01391001/document
https://hal.archives-ouvertes.fr/hal-01391001/file/could-fucoxanthin-interaction-with-lipid-rafts-mediate-its-cytotoxicity-incancer-cells-.pdf
DOI : 10.4172/jomr.1000144

Éditeur(s) : HAL CCSD Instituto de Medicina Tropical
Résumé : International audience
Malaria is a major health problem for people who live on the border between Brazil and French Guiana. Here we discuss Plasmodium vivax distribution pattern in the town of Oiapoque, Amapá State using the circumsporozoite (CS) gene as a marker. Ninety-one peripheral blood samples from P. vivax patients have been studied. Of these, 64 individuals were from the municipality of Oiapoque (Amapá State, Brazil) and 27 patients from French Guiana (August to December 2011). DNA extraction was performed, and a fragment of the P. vivax CS gene was subsequently analyzed using PCR/RFLP. The VK210 genotype was the most common in both countries (48.36% in Brazil and 14.28% in French Guiana), followed by the P. vivax-like (1.10% in both Brazil and French Guiana) and VK247 (1.10% only in Brazil) in single infections. We were able to detect all three CS genotypes simultaneously in mixed infections. There were no statistically significant differences either regarding infection site or parasitaemia among individuals with different genotypes. These results suggest that the same genotypes circulating in French Guiana are found in the municipality of Oiapoque in Brazil. These findings suggest that there may be a dispersion of parasitic populations occurring between the two countries. Most likely, this distribution is associated with prolonged and/or more complex transmission patterns of these genotypes in Brazil, bordering French Guiana.
ISSN: 0036-4665

inserm-01408935
http://www.hal.inserm.fr/inserm-01408935
http://www.hal.inserm.fr/inserm-01408935/document
http://www.hal.inserm.fr/inserm-01408935/file/2016%2C%20Gomes%20-%20Evaluation%20of%20circumsporozoite%20protein%20of%20Plasmodium%20vivax.pdf
DOI : 10.1590/S1678-9946201658072

Éditeur(s) : HAL CCSD Wiley
Résumé : Over the past three decades, many small-scale floristic studies of white-sand forests across the Amazon basin have been published. Nonetheless, a basin-wide description of both taxonomic and phylogenetic alpha and beta diversity at regional scales has never been achieved. We present a complete floristic analysis of white-sand forests across the Amazon basin including both taxonomic and phylogenetic diversity. We found strong regional differences in the signal of phylogenetic community structure with both overall and regional Net Relatedness Index and Nearest Taxon Index values found to be significantly positive leading to a pattern of phylogenetic clustering. Additionally, we found high taxonomic dissimilarity but low phylogenetic dissimilarity in pairwise community comparisons. These results suggest that recent diversification has played an important role in the assembly of white-sand forests causing geographic neo-endemism patterns at the regional scale.
ISSN: 0006-3606

hal-01532549
https://hal.archives-ouvertes.fr/hal-01532549
DOI : 10.1111/btp.12298
PRODINRA : 353398

Éditeur(s) : A Lahure A Lahure ( Paris )
Résumé : (Statement of Responsibility) présenté à Rome le 26 septembre 1903 par Joaquim Nabuco, envoyé extraordinaire et ministre plénipotentiaire du Brésil en mission spéciale auprès de Sa Majesté le roi d'Italie.
Brazil
Guyana
Guyana
Brazil

000128035
23886960
AAP4029

Éditeur(s) : A Lahure A Lahure ( Paris )
Résumé : (Statement of Responsibility) présenté à Rome le 26 septembre 1903 par Joaquim Nabuco, envoyé extraordinaire et ministre plénipotentiaire du Brésil en mission spéciale auprès de Sa Majesté le roi d'Italie.
Brazil
Guyana
Guyana
Brazil

000128035
23886960
AAP4029

Éditeur(s) : HAL CCSD Sociedade Entomológica do Brasil
Résumé : Variations in diel activity among hyperdiverse tropical communities of moths, despite representing a key component of niche partitioning between species, have barely been studied so far. Using light trapping from dawn to sunset over a 1-year period in French Guiana, we investigated these variations within and between two families of moths (Sphingidae and Saturniidae). Our results revealed contrasting patterns in flight activity at night between Sphingidae and Saturniidae. Sphingidae reached their peak in species richness and abundance between 7:00 and 8:00 p.m., followed by a decrease around 11:00 p.m. to midnight, whereas Saturniidae were continuously present throughout the night, with a peak around midnight. In addition, we found changes in diel activity among some of the most common genera in each family, highlighting distinct behavioral, physiological, and functional traits among taxa. Given differences in flight activity at different taxonomic levels, it is strongly recommended to monitor by light trapping throughout the night to effectively sample saturniid and sphingid assemblages, even though the activity of Sphingidae sharply declines after midnight. These results improve the general natural history information of tropical moths and reinforce the need of further research on the ecological and taxonomic consequences of differences in diel activity.
ISSN: 1519-566X

hal-01536447
https://hal.archives-ouvertes.fr/hal-01536447
DOI : 10.1007/s13744-014-0264-3
PRODINRA : 320714

Éditeur(s) : HAL CCSD [London] : Nature Pub. Group Nature Publishing Group
Résumé : International audience
The deeply eroded West Gondwana Orogen is a major continental collision zone that exposes numerous occurrences of deeply subducted rocks, such as eclogites. The position of these eclogites marks the suture zone between colliding cratons, and the age of metamorphism constrains the transition from subduction-dominated tectonics to continental collision and mountain building. Here we investigate the metamorphic conditions and age of high-pressure and ultrahigh-pressure eclogites from Mali, Togo and NE-Brazil and demonstrate that continental subduction occurred within 20 million years over at least a 2,500-km-long section of the orogen during the Ediacaran. We consider this to be the earliest evidence of large-scale deep-continental subduction and consequent appearance of Himalayan-scale mountains in the geological record. The rise and subsequent erosion of such mountains in the Late Ediacaran is perfectly timed to deliver sediments and nutrients that are thought to have been necessary for the subsequent evolution of sustainable life on Earth.
ISSN: 2041-1723

hal-01122789
https://hal.archives-ouvertes.fr/hal-01122789
DOI : 10.1038/ncomms6198