Tropics
Mostrando 1-12 de 225 artigos, teses e dissertações.
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1. Gênero Cryptostegia: fitoquímica, atividades biológicas e aplicações industriais
The genus Cryptostegia comprises two species, C. madagascariensis (Bojer) and C. grandiflora (Roxb. Ex R. Br) that belong to the Apocynaceae family and are widely distributed in the tropics, as in Australia, New Zealand, India and Brazil, where they cause great socioeconomic and environmental damage, as they are invaders causing damage, mainly in the cultiva
Quím. Nova. Publicado em: 2021-06
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2. Dermoscopy - a simple and rapid in vivo diagnostic technique for tinea incognito
Abstract Tinea incognito resulting from corticosteroid abuse is becoming very common in the tropics. Its diagnosis is tricky owing to its confusing morphology, as well as practical and technical issues associated with mycological tests. Dermoscopy has now evolved as a novel diagnostic tool for diagnosing tinea incognito in such challenging situations, since
An. Bras. Dermatol.. Publicado em: 09/12/2019
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3. Anthropogenic impacts on aquatic bacteria: a perspective from the tropics
Resumo O bacterioplâncton compreende um grupo altamente diversificado de microrganismos, que são dominantes nos ecossistemas aquáticos e desempenham um papel central no funcionamento desses ecossistemas e nos ciclos biogeoquímicos. Devido às suas elevadas taxas de dispersão e de mudança na composição, bem como alta adaptabilidade e plasticidade, os
Acta Limnol. Bras.. Publicado em: 14/11/2019
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4. Germination of spores of Amazonian ferns Polypodium aureum in different culture media
Resumo A maior diversidade de samambaias ocorre nos trópicos onde aproximadamente três quartos das espécies são encontradas. Na flora brasileira, as pteridófitas possuem uma megadiversidade, sendo importante grupo vegetal. O objetivo foi estudar a germinação dos esporos de samambaias Polypodium aureum em diferentes tipos de meio de cultura. Os esporâ
Ornam. Hortic.. Publicado em: 28/10/2019
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5. Phosphorus acquisition by wheat from organic and inorganic sources labelled with 32P and 33P radioisotopes
ABSTRACT: Investment in soil phosphorus (P) capital in the tropics is often constrained by poor availability of mineral fertiliser to small-scale farmers. Consequently, new sustainable agricultural cropping strategies are required to maintain fertility and maximise crop yields. The co-application of Tithonia diversifolia (Tithonia) green manure and mineral f
Sci. agric. (Piracicaba, Braz.). Publicado em: 05/09/2019
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6. Entre a Yeomanry tropical e os Trobriandenses coloniais: origens e debates da historiografia sobre a formação do Brasil
RESUMO A historiografia sobre os primeiros três séculos da história do Brasil tem sido vincada, nas últimas duas décadas, por um acirrado debate entre duas correntes de interpretação de nossa formação colonial, a saber, a do Antigo Sistema Colonial e a do Antigo Regime nos Trópicos. Além de indicar as principais linhas de formação historiográfi
História. Publicado em: 01/07/2019
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7. Optimal plant density and nitrogen rates for improving off-season corn yields in Brazil
ABSTRACT: Integrating plant density and nitrogen (N) management is a strategy for improving corn yields, especially for off-season corn production in the tropics. This study tested the hypothesis that increasing plant densities and N rates promotes yield gains for off-season corn production in high-yielding environments. The aim of the study was to investiga
Sci. agric. (Piracicaba, Braz.). Publicado em: 2019-07
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8. Mycophagous Drosophilidae (Diptera) guild and their hosts in the Brazilian Amazon
Abstract The composition and potential hosts of mycophagous Drosophilidae from a section of the Brazilian Amazon forest in the Caxiuanã National forest were investigated. Sampling was performed in three different periods at long the wet season (January (beginning) and July (end) 2013 and May (middle) 2014). The samples were collected from existing trails by
Pap. Avulsos Zool.. Publicado em: 20/05/2019
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9. Allometric models to estimate tree height in northern Amazonian ecotone forests
RESUMO Modelos alométricos que definem o relacionamento entre diâmetro do tronco e a altura total da árvore na bacia amazônica são importantes porque refinam as estimativas de fluxo e estoques de carbono arbóreo na região. Este estudo testou diferentes modelos alométricos para estimar a altura total de árvores a partir do diâmetro do tronco em uma
Acta Amaz.. Publicado em: 06/05/2019
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10. Effect of hydration in vase life of two Heliconia cultivars
Resumo Assegurar a extensão do período de durabilidade de hastes comerciais de Heliconia é fundamental no processo de aceitação do consumidor final. Para isso, o objetivo da pesquisa foi avaliar o efeito da hidratação na vida dos vasos de duas cultivares de Heliconia. Foram utilizados delineamentos experimentais de blocos ao acaso com parcelas subdivi
Ornam. Hortic.. Publicado em: 29/04/2019
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11. Advances in the production of temperate fruits in the tropics
ABSTRACT. The present study aimed to review the advances in the production of temperate fruits to determine future research directions that improve production in the tropics. Temperate fruits are no longer only produced in regions characterized by a cold winter period. These fruits are also produced in the sub-tropical and tropical regions characterized by m
Acta Sci., Agron.. Publicado em: 17/12/2018
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12. Potential role of dengue virus, chikungunya virus and Zika virus in neurological diseases
This study showed that laboratory markers of recent infection by dengue, Zika or chikungunya arboviruses were detected in the biological samples of approximately one-third of patients with encephalitis, myelitis, encephalomyelitis or Guillain-Barré syndrome, in a surveillance programme in Piauí state, Brazil, between 2015-2016. Fever and myalgia had been a
Mem. Inst. Oswaldo Cruz. Publicado em: 29/10/2018