Botanical
Mostrando 1-12 de 396 artigos, teses e dissertações.
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1. Fast and novel botanical exploration of a 320-km transect in eastern Amazonia using DNA barcoding
RESUMO Um transecto de 320 km foi explorado na Serra do Tumucumaque, ao longo da fronteira entre o sul da Guiana Francesa e o Brasil por meio da amostragem de todas as árvores e lianas com DAP ≥ 10 cm em sete parcelas de 25 x 25 m instaladas perto de sete marcos fronteiriços. Isolamos DNA de tecido cambial e sequenciamos dois códigos de barra de DNA (rb
Acta Amazonica. Publicado em: 2022
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2. METABOLIC PROFILING AND CYTOTOXIC ACTIVITY OF METHANOL EXTRACTS FROM CHAMAECRISTA DUCKEANA (P. BEZERRA & A. FERN.) H. S. IRWIN & BARNEBY (LEGUMINOSAE, CAESALPINIOIDEAE)
The genus Chamaecrista comprises more than 330 species, with only a few studies on their chemical composition and biologic activities. In this study, the phytochemical profile of leaf, stems, and fruits extracts of the C. duckeana were examined by UPLC ESI HRMS analysis to determine possibly bioactive constituents. The antioxidant activity was carried out th
Química Nova. Publicado em: 2022
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3. Honey sample collection methods influence pollen composition in determining true nectar-foraging bee plants
ABSTRACT This study investigated the suitability of honey sample collection methods for determining the botanical origin of honey through palynological analysis. We used three methods to collect honey samples in three different modes viz. extracted honey using a honey extractor, squeezed honey and pipetted honey (collected by micropipette/dropper from honey
Acta Bot. Bras.. Publicado em: 2020-09
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4. Early induction of orthotropic shoots in Coffea canephora
ABSTRACT In Coffea canephora, the number of orthotropic shoots is directly related to plant yield. The objective of this study was to evaluate the vegetative and yield performance of Coffea canephora, from the botanical variety Conilon, under different management systems for early emission of orthotropic shoots. The experiment was carried out in Ouro Preto d
Rev. Ceres. Publicado em: 2020-08
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5. 180 years of Botanical Investigations in Antarctica and the Role of Brazil
ABSTRACT Botany is one of the oldest sciences done above the 60oS parallel with more than 180 years passing since the first professional botanist collected plants in Antarctica. Far from being a barren place, plants constitute an important part of polar ecosystems. Brazil is one of only 29 countries in the world with consultative status and to currently d
Acta Bot. Bras.. Publicado em: 2020-06
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6. Pollen sources used by Frieseomelitta Ihering 1912 (Hymenoptera: Apidae: Meliponini) bees along the course of the Rio Negro, Amazonas, Brazil
ABSTRACT Insect pollination has influenced the evolution and diversification of angiosperms. Consequently, knowing plants used as food sources by bees, the most important pollinator group, is the first step toward understanding how their ecological relationships works. Pollen source information is also highly relevant for bee management and associated fruit
Acta Bot. Bras.. Publicado em: 2020-06
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7. Adaptability and stability of Coffea canephora Pierre ex Froehner genotypes in the Western Amazon
RESUMO: O desenvolvimento de novas cultivares de Coffea canephora fundamenta-se na caracterização do comportamento diferenciado dos clones em diferentes locais de cultivo. O objetivo deste trabalho foi estudar a interação genótipo x ambientes visando selecionar clones de adaptação ampla e específica à diferentes ambientes da Amazônia Ocidental. Do
Cienc. Rural. Publicado em: 10/01/2020
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8. Resorcinolic Lipids from Yucatecan Propolis
Propolis is a material produced by bees from a combination of plant exudates and wax, used to fill out cracks in the beehive and to defend against intruders and pathogenic microorganisms; it is recognized for its many biological activities and its chemical composition depends on the botanical sources close to the beehive. The objective of this investigation
J. Braz. Chem. Soc.. Publicado em: 2020-01
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9. Integrative Approach Based on Leaf Spray Mass Spectrometry, HPLC-DAD-MS/MS, and NMR for Comprehensive Characterization of Isoquinoline-Derived Alkaloids in Leaves of Onychopetalum amazonicum R. E. Fr.
Onychopetalum is an Amazonian botanical genus close-related with Bocageopsis and Unonopsis, whose species are used in traditional medicine. Although these genera are widely investigated from the phytochemical viewpoint, the knowledge about Onychopetalum remains almost unexplored. In order to perform a comprehensive characterization of isoquinoline-derived al
J. Braz. Chem. Soc.. Publicado em: 2020-01
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10. Floral Diversity in Different Types of Honey
Abstract Many different types of honey are available in the Brazilian market. They vary in color, flavor, smell, thereby increasing interest in honey characterization relating to botanical origin. A total of 155 honey samples belonging to Brazilian flora were examined on the pollen analysis; sampling is made in a span of one year. The preparation followed me
Braz. arch. biol. technol.. Publicado em: 20/12/2019
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11. Synopsis of Capparaceae to the flora of Colombia
Resumo Foi realizada uma sinopse taxonômica de Capparaceae da Colômbia e sua distribuição com a revisão de 1.800 amostras botânicas de 13 herbários da Colômbia, cinco instituições internacionais e cerca de 100 amostras coletadas em campo. Foram encontradas 32 espécies e oito gêneros de acordo com a última modificação taxonômica proposta para
Rodriguésia. Publicado em: 20/12/2019
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12. Composição florística de um inselberg no semiárido paraibano, nordeste brasileiro
Resumo Este trabalho objetivou catalogar a flora vascular de um inselberg no município de Patos, estado da Paraíba, Brasil e reconhecer a distribuição das espécies arbóreas em diferentes classes de altitude. O estudo foi desenvolvido no afloramento rochoso localmente conhecido como Morro do Carioca. Coletas botânicas foram realizadas mensalmente duran
Rodriguésia. Publicado em: 20/12/2019