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Viabilidade e superação da dormência em sementes de Araçá-boi (Eugenia stipitata ssp. sororia) Acta Amazonica
GENTIL,Daniel Felipe de O; FERREIRA,Sidney Alberto do N.
O araçá-boi (Eugenia stipitata ssp. sororia McVaugh - Myrtaceae) é uma frutífera amazônica com potencial agroindustrial. O presente trabalho verificou os efeitos da desidratação sobre a viabilidade de sementes e avaliou métodos de escarificação mecânica (por descascamento e lixamento) na superação da dormência de sementes dessa espécie. A qualidade fisiológica das sementes é afetada pela redução do teor de água. As sementes apresentam comportamento recalcitrante, sendo que o nível crítico de umidade pode estar situado entre 58,8 e 47,1%. A desidratação a níveis iguais ou inferiores a 25,76% de água provocou a morte em 100% das sementes. As sementes devem ser semeadas, preferencialmente, logo após a extração e limpeza. O tegumento das sementes apresenta...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Fisiologia de sementes; Teor de água; Recalcitrante; Escarificação mecânica.
Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671999000100021
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Victoria amazonica ou Victoria regia? Acta Amazonica
Prance,Ghillean T..
RESUMO Um resumo da história taxonômica do gênero Victoria Lindl. é apresentado. É mostrado que a espécie freqüentemente chamada Victoria regia Lindl., em verdade deve ser chamada Victoria amazonica (Poeppig) Sowerby. Embora Sowerby tenha feito a nova combinação nomenclatural no ano de 1850, o nome correto é ainda pouco usado. Espera o autor que o trabalho chame a atenção para a nomenclatura e estimule o uso do nome correto — Victoria amazonica.
Ano: 1974 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671974000300005
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Virgilio de Portugal brito Araújo (1919 - 1983) Acta Amazonica
Kerr,Warwick Ε..
Ano: 1984 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671984000100327
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Virola theiodora como alucinógena e tóxica Acta Amazonica
Maia,J. G. Soares; Rodrigues,William A..
Sinopse Comprova-se por análise cromatográfica (CCD) e espectrometrias no infravermelho (IV) e no ultravioleta (UV) o duplo emprego da casca de Virola theiodora (Spruce ex Benth.) Warb. (Myristicaceae) no preparo de rapé alucinogênico e envenenamento de flechas, pelos índios Yomanê, da região do rio Tototobi, Território Federal de Roraima.
Ano: 1974 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671974000100021
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Vitamins in fruits and vegetables of the Amazon. 1. Methods for the determination of β—carotene, tocopherol and ascorbic acid with high performance liquid chromatography (HPLC) Acta Amazonica
Marx,F.; Maia,J.G.S..
Summary At the beginning of on inventory of the chemical composition of regional fruits and vegetables of the Amazon, analytical methods were adapted for the high performance liquid chromatography (HPLC) determination of pro-vitamin A (β—carotene), vitamin C (ascorbic acid) and vitamin E (tocopherol) The first analyses indicate as excellent sources of β—carotene, Mauritia flexuosa L., Astrocaryum tucuma Mart. and Cucurbita pepa L.; of asco bic acid Theobroma grandiflorum (Culis ex Spreng.) Schum. and Gnetum paniculatum Spr. ex Ben. th. and of vitamin E, Mauritia flexuosa L. and Euterpe oleracea Mart.
Ano: 1983 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671983000600823
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Vocalizations of primary forest frog species in the Central Amazon. Acta Amazonica
Zimmerman,Barbara L.; Bogart,James P..
The calls of 18 species of Amazonian forest frogs were recorded in 3 localities: the Tapajos National Park near Itaituba, the Reserva Ducke near Manaus, and the INPA-WWF reserves near Manaus. Structural and time parameters and sonographs of these calls including previously undescribed vocalization by 10 species are presented. Unlike open habitat species, several forest frong species characteriscally demonstrated one on more of the following temporal parameters: very low call rates, sporadic intervals, infrequent nights of calling and synchronized chorusing. It is hypothesized that predation has influenced the evolution of vocal behaviour in Amazonian forest frogs.
Tipo: Info:eu-repo/semantics/article
Ano: 1984 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671984000200473
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Water and cation movement in a tropical rainforest environment. I. Objectives, experimental design and preliminary results. Acta Amazonica
Nortcllff,S.; Thornes,J. B..
Abstract The paper briefly outlines work being done on the movement of cations under a Palmetum-type rain forest near Manaus, Amazonas. It is suggested that the low cation content of river waters Is concerned with the nature and dynamics of water movement in relation to soil moisture and tension as much as lack of availability of cations in the soil. Preliminary results support the idea of a 'by-pass' mechanism whereby the smaller pore spaces, saturated with water, only drain and provide cation-rich water late in the dry season.
Ano: 1978 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671978000200245
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Water recycling in tropical forests as a stochastic process Acta Amazonica
Clarke,R. T.; Cooper,D. M..
Tipo: Info:eu-repo/semantics/article
Ano: 1986 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671986000100239
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Weekly water-loss from Spherical Water-loss Integrators on a Clearing and below Secondary Growth in Central Amazonia () Acta Amazonica
Brinkmann,W. L. F..
Abstract: Spherical ceramic bulbs were set up as weekly water-loss integrators on a clearing and below a 2 year-old Cecropia-commumty at Km 18 of the Manaus-Itacoatiara Road. The instruments worked well in distinguishing the particular responses of individual sites to the impact of atmospheric agents as solar radiation, air temperature, air humidity and wind. Water-loss was primarily dependent on the order of magnitude of the weekly total of solar radiation and the presence or lack of a standing crop. Already a scarce secondary growth will reduce the weekly amount of water lost to the atmosphere considerably. Shelter-wood, however, considering the crop specific demands if introduced to tropical agriculture would provide favourable conditions as far as the...
Ano: 1972 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671972000100033
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Why further investigation of brazilian Strychnos? Acta Amazonica
Angenot,L..
During the past fifteen years, African Strychnos species have been pharmacologically and chemically screened by some European Universities, sometimes with the collaboration of some African Institutes. Strychnos usambarensis will be discussed here because of our interest in it, after the discovery of its use in the preparation arrow poison with curarizing activity.The European studies have show thah the African species of Strychnoschemically are very similar to certain South-American species. Indeed, the occurrence in the African species of curarizing quaternary bases, and in the American species of tetanizing tertiary bases, such as akagerine, emphasizes the unity of genus Strychnos in terms of it alkaloids. Many biological activities (antmicrobial,...
Tipo: Info:eu-repo/semantics/article
Ano: 1988 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671988000500241
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Wood density of trees in black water floodplains of Rio Jaú National Park, Amazonia, Brazil Acta Amazonica
PAROLIN,Pia; WORBES,Martin.
The Jaú National Park is the largest protected forested area in the world. The Vitória Amazônica Foundation is working towards understanding its ecosystem, to which this paper contributes. Wood density was analysed in 27 common tree species growing in the blackwater flood-plains of the Rio Jaú, an affluent of the Rio Negro (Amazonia, Brazil). Wood was sampled with an increment borer. Mean wood density of the analysed species ranged from 0.35 to 0.87 g cm-3. The mean of all sampled species was 0.67 g cm-3 (st. dev. 0.13). Lowest density was found for Hevea spruceana with 0.32 g cm-3 and highest for Crudia amazonica with 0.9 g cm-3.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Wood specific gravity; Wood density; Increment rings; Blackwater floodplain forest; Igapó; Rio Jaú; Central Amazonia.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672000000300441
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Wood specific gravity of trees and forest types in the southern Peruvian Amazon Acta Amazonica
WOODCOCK,Deborah W..
Estimates of terrestrial biomass depend critically on reliable information about the specific gravity of the wood of forest trees. The study reported on here was carried out in the southern Peruvian Amazon and involved collection of wood samples from trees (70 spp.) in intact forest stands. Results demonstrate the high degree of variability in specific gravity (ovendry weight/green volume) in trees at single locations. Three forest types (swamp, high terrace forest with alluvial soil, and sandy-soil forest) had values close to the average reported for tropical forest woods (.69). Two early successional forest types, which make up as much as 12% of the total vegetated area in this part of the Amazon, had values significantly lower (.40). An increase in...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Wood specific gravity; Tropical forest biomass; Southern Peruvian Amazon.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672000000400589
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Yield of essential oil and safrole content based on fresh and dry biomass of long pepper in the Brazilian Amazon Acta Amazonica
NEGREIROS,Jacson Rondinelli da Silva; MIQUELONI,Daniela Popim; CARTAXO,Cleísa Brasil da Cunha.
Long pepper (Piper hispidinervum) is an Amazonian species of commercial interest due to the production of safrole. Drying long pepper biomass to extract safrole is a time consuming and costly process that can also result in the contamination of the material by microorganisms. The objective of this study was to analyze the yield of essential oil and safrole content of fresh and dried biomass of long pepper accessions maintained in the Active Germoplasm Bank of Embrapa Acre, in the state of Acre, Brazil, aiming at selecting genotypes with best performance on fresh biomass to recommend to the breeding program of the species. Yield of essential oil and safrole content were assessed in 15 long pepper accessions. The essential oil extraction was performed by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Piper hispidinervum; Breeding program; Oil extraction.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000100075
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Zootherapy in the Amazon: green anaconda ( Eunectes murinus ) fat as a natural medicine to treat wounds Acta Amazonica
SOUZA,Erika; WERNECK,Fernanda P.; MATOS,Leonardo B.; FRAGA,Rafael de.
ABSTRACT Zootherapy (the use of the therapeutic potential of animals) is at least 6,000 years old, and has been kept active throughout generations until modern days. Animal fat is commonly used in the zootherapeutic folk medicine from South America, specially the green anaconda’s fat, which is widely promoted as a natural medicine to treat wounds, even though there is no scientific evidence showing its efficacy. In this study we compared the total healing time and the proportional daily reduction of dorsal epithelial incisions in adult male Wistar rats treated with nitrofural (a commercial cicatrizing ointment) and with anaconda fat. We applied the treatments every two days and measured the incision diameter daily, during ten consecutive days. Differences...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Ethnozoology; Folk medicine; Snakes; Wistar.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672017000400341
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ΒΟΜΒΑ COM BRAÇO OSCILANTE ACIONADA POR CORRENTEZA DE RIOS Acta Amazonica
Harwood,John H.; Moraes,Rejane de Siqueira.
Uma bomba d'água acionada por correnteza de rios foi construída e testada. O desenho incorporou um hidrofólio suportado por um braço oscilante. Uma mudança automática do ângulo de ataque do hidrofólio faz com que o braço levante e desça continuamente, acionando uma boma de pistão. Com correntezas de 0,6 a 1,1m2 a vazão da bomba foi de 3 a 6 m3 de água por dia a uma altura de 9 m. A bomba tem boas possibilidades de poder abastecer casas situadas pertos de rios de terra firme com água desses rios.
Tipo: Info:eu-repo/semantics/article
Ano: 1992 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671992000300421
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Ο INPA e os grandes projetos na Amazonia Acta Amazonica
Santos,Jesus Marden dos.
Tipo: Info:eu-repo/semantics/other
Ano: 1982 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59671982000200245
Registros recuperados: 2.916
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