|
|
|
| Registros recuperados: 10.106 | |
|
|
| SOLLERO, B. P.; CARDOSO, F. F.; GASPAR, E. B.; MINHO, A. P.; GULIAS-GOMES, C. C.. |
| As raças taurinas de corte puras e suas compostas aliam atributos de interesse, como ata produtividade, precocidade e especialmente qualidade da came, mas sua criação em larga escala em ambientes tropicais e subtropicais é, frequentemente, limitada por problemas sanitários, que demandam tratamentos intensivos baseados em insumos químicos com eficácia limitada. |
| Tipo: Artigo de divulgação na mídia (INFOTECA-E) |
Palavras-chave: Melhoramento genético animal; Bovino; Ferramenta. |
| Ano: 2015 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1034124 |
| |
|
|
| Van Sebille, Erik; Wilcox, Chris; Lebreton, Laurent; Maximenko, Nikolai; Hardesty, Britta Denise; Van Franeker, Jan A.; Eriksen, Marcus; Siegel, David; Galgani, Francois; Law, Kara Lavender. |
| Microplastic debris floating at the ocean surface can harm marine life. Understanding the severity of this harm requires knowledge of plastic abundance and distributions. Dozens of expeditions measuring microplastics have been carried out since the 1970s, but they have primarily focused on the North Atlantic and North Pacific accumulation zones, with much sparser coverage elsewhere. Here, we use the largest dataset of microplastic measurements assembled to date to assess the confidence we can have in global estimates of microplastic abundance and mass. We use a rigorous statistical framework to standardize a global dataset of plastic marine debris measured using surface-trawling plankton nets and coupled this with three different ocean circulation models... |
| Tipo: Text |
Palavras-chave: Marine debris; Ocean circulation; Model comparison. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00309/42053/41349.pdf |
| |
|
|
| Doorenweerd, C.; Nieukerken, E.J. van; Menken, S.B.J.. |
| Background: Host association patterns in Ectoedemia (Lepidoptera: Nepticulidae) are also encountered in other insect groups with intimate plant relationships, including a high degree of monophagy, a preference for ecologically dominant plant families (e.g. Fagaceae, Rosaceae, Salicaceae, and Betulaceae) and a tendency for related insect species to feed on related host plant species. The evolutionary processes underlying these patterns are only partly understood, we therefore assessed the role of allopatry and host plant family shifts in speciation within Ectoedemia. Methodology: Six nuclear and mitochondrial DNA markers with a total aligned length of 3692 base pairs were used to infer phylogenetic relationships among 92 species belonging to the subgenus... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Ectoedemia; Moths; Nepticulidae; Plant relationships; Host shift; Leafminers. |
| Ano: 2015 |
URL: http://www.repository.naturalis.nl/record/648511 |
| |
|
| |
|
| |
|
| |
|
|
| Belik,Walter. |
| O artigo faz uma rápida revisão sobre os trabalhos que tratam da heterogeneidade da agricultura brasileira, demonstrando que essa é uma condição historicamente verificada no nosso meio rural e que pode ser encontrada em outras agriculturas, mais tecnificadas ou intensivas em mão de obra. Procura-se evidenciar que, mais que a heterogeneidade, a política pública deve voltar a sua atenção para a redução das desigualdades que têm suas causas ligadas ao acesso diferenciado aos fatores de produção e à baixa capacidade dos produtores em obter ganhos líquidos nas suas explorações. Recomenda-se a adoção de ações simples ligadas à assistência técnica, extensão rural, financiamento da produção e comercialização. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Política agrícola; Desenvolvimento rural; Heterogeneidade.. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-20032015000100009 |
| |
|
|
| Mougel, Berengere; Moreira, Manuel; Agranier, Arnaud. |
| We investigate in details helium isotope data reported in Mougel et al. (2014) for 14 basaltic samples collected on the East Pacific Rise by submersible (15 degrees 4N) where the ridge interacts with the Mathematician seamounts. Samples locations are separated by only few hundred meters across a 15km along-axis profile. The data reveal a strong geochemical variability that has never been observed at such high spatial resolution for helium isotope compositions. Moreover, they reveal an unusually high He-4/He-3 mantle component also characterized by unradiogenic lead, atypical in oceanic basalts. He-Pb systematics suggests a mixture between a nonradiogenic lead and radiogenic helium pyroxenitic component, recycled from the deep continental lithosphere and... |
| Tipo: Text |
Palavras-chave: Helium; Isotopes; Mantle geochemistry; MORB; Hot spot; EPR. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00639/75140/75500.pdf |
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Goswami, Bedanta K.; Weitemeyer, Karen A.; Minshull, Timothy A.; Sinha, Martin C.; Westbrook, Graham; Chabert, Anne; Henstock, Timothy J.; Ker, Stephan. |
| We acquired coincident marine controlled-source electromagnetic (CSEM), high-resolution seismic reflection and ocean-bottom seismometer (OBS) data over an active pockmark in the crest of the southern part of the Vestnesa Ridge, to estimate fluid composition within an underlying fluid-migration chimney. Synthetic model studies suggest resistivity obtained from CSEM data can resolve gas or hydrate saturation greater than 5% within the chimney. Acoustic chimneys imaged by seismic reflection data beneath the pockmark and on the ridge flanks, were found to be associated with high-resistivity anomalies (+2-4 m). High-velocity anomalies (+0.3 km/s), within the gas hydrate stability zone (GHSZ) and low-velocity anomalies (-0.2 km/s) underlying the GHSZ, were also... |
| Tipo: Text |
Palavras-chave: Gas hydrate; Svalbard; CSEM; Saturation; Pockmark; Vestnesa. |
| Ano: 2015 |
URL: http://archimer.ifremer.fr/doc/00283/39458/37928.pdf |
| |
| Registros recuperados: 10.106 | |
|
|
|
