Consulta: subjectFacets:"Pyrene"
Registros recuperados: 7
Data/hora: 07/06/2024 00:43:24

CHEMICAL COMPOSITION AND TETRAZOLIUM TEST OF Syagrus romanzoffiana (Cham.) Glassman SEEDS
Provedor de dados: 94
Autores: IOSSI,EMERSON; MORO,FABIOLA VITTI; VIEIRA,BRUNO GUILHERME TORRES LICURSI; BARBOSA,RAFAEL MARANI; VIEIRA,ROBERVAL DAITON.
ABSTRACT  Queen palm is a tropical species of ecological importance and economic potential in various uses, including food. However, the knowledge about the nutritional value of fruits and the estimation of seed viability are still scarce. The aims of this work were to study the biometrics and chemical composition of fruits and seeds; describe the anatomy of embryos and assess the viability of the tetrazolium test. Mature fruits were collected, processed and submitted to biometry, water content, pulp and seeds chemical composition, germination and emergence in the laboratory evaluations. For the tetrazolium test, whole embryos were immersed in solution at 40 °C for one, two, four and six hours and compared with germination. The fruit pulp is rich in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Queen palm; Embryo; Germination; Palm; Pyrene.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000402001

PHYSIOLOGICAL POTENTIAL AND CONSERVATION OF MURUCI (Byrsonima crassifolia) SEEDS
Provedor de dados: 94
Autores: GRZYBOWSKI,CAMILA RIBEIRO DE SOUZA; NASCIMENTO,WALNICE MARIA OLIVEIRA DO; SILVA,ROSEMEIRE CARVALHO DA; VIEIRA,ELISA SERRA NEGRA; PANOBIANCO,MARISTELA.
ABSTRACT  The goal of the present study is to assess the physiological potential of Byrsonima crassifoliaseeds and analyze the procedures of the germination and tetrazolium tests, as well as the conservation of such seeds by testing different combinations of packaging and environment. The experiment used pyrenes of the clone Açu, collected from mother plants in the germplasm collection of muruci plants of Embrapa Amazonia Oriental, in Belém, Brazil. Different temperatures were tested in the germination test (25, 30, 35 and 20 - 30 ºC). The best methodology and assessment dates were determined for the test, and the seedlings of the species were characterized. Viability was assessed with the tetrazolium test, with combinations of hydration methods (by...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pyrene; Germination; Tetrazolium test; Storage.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452017000502001

Seed anatomy and germination of Phoenix roebelenii O'Brien (Arecaceae)
Provedor de dados: 95
Autores: Iossi,Emerson; Moro,Fabiola Vitti; Sader,Rubens.
The objective of this study was to investigate the morphology, anatomy and germination behaviour of Phoenix roebelenii seeds. Biometric data were obtained by measuring 100 seeds extracted from recently harvested fruits and air-dried for one day. Four replications of 50 seeds each were previously treated with Vitavax-Thiran and then put to germinate in Sphagnum sp. in plastic trays at room temperature. Morphological details of the seeds were documented with the help of a scanning electronic microscope and then drawings were made with the help of a clear camera coupled to a stereomicroscope. Permanent lamina containing embryo sections were prepared to study its anatomy. The mean dimensions of the seeds were: length of 10.32mm, width of 5.21mm and thickness...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Palm; Pigmy date palm; Pyrene; Seedling.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-31222006000300018

Tolerance to Polycyclic Aromatic Hydrocarbons (PAHs) by filamentous fungi isolated from contaminated sediment in the Amazon region
Provedor de dados: 3
Autores: Souza, Hilton Marcelo de Lima; Barreto, Lindimar Rosas; Mota, Adolfo José da; Oliveira, Luiz Antônio de; Barroso, Hileia dos Santos; Zanotto, Sandra Patricia.
 Tolerance to Polycyclic Hydrocarbons Aromatic (PAHs) is considered an important characteristic when assessing the bioremediation potential of microorganisms. Given this, the objective of this research was to assay filamentous fungi from the Amazon region, isolated from sediments with differents levels of contamination by PAHs, for tolerance to phenanthrene and pyrene. To achieve this, fungal cultures plugs (5 mm), obtained after 7 days growth, were transferred to petri dishes containing 20% Sabouraud dextrose agar medium, after surface innoculation with phenanthrene and pyrene crystals, separately. Radial mycelial growth was evaluated after 10 days at five different concentration levels for each contaminant and control group, all in triplicate for each...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.12.00.00-9 phenanthrene; Pyrene; Fungal growth inhibition; Amazon. Microbiologia ambiental.
Ano: 2017
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/34709

Selectivity and efficiency of pyrene attachment to alkanes induced by broadband X-rays
Provedor de dados: 42
Autores: BROWN,GERALD O.; GUARDALA,NOEL A.; PRICE,JACK L.; WEISS,RICHARD G.
Bombardment of pyrene-doped n-heneicosane (C21H44) in its orthorhombic solid phase with &lt;1.3&gt; MeV broadband X-rays results in the formation of both mono- and di-heneicosylpyrenes, whereas the same dose in liquid cyclohexane yields only monosubstituted pyrene. In both cases, the reaction efficiency decreases as pyrene concentration is increased from 10-5 to 10-2 M. Qualitatively, the overall attachment efficiency is higher in orthorhombic n-heneicosane than in liquid cyclohexane, but the selectivity of attachment is greater in cyclohexane. Differences between these results and those from irradiations of the same samples with eV range photons are discussed.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Broadband x-rays; Pyrene; Cyclohexane; Heneicosane.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652003000100005

Monitoring the effect of pyrene on the germination and radial growth of the wild and mutant strains of Rhizopus arrhizus UCP402
Provedor de dados: 52
Autores: Shiosaki,Ricardo Kenji; Albuquerque,Clarissa Daisy da Costa; Okada,Kaoru; Fukushima,Kazutaka; Campos-Takaki,Galba Maria.
The physiological mutant of Rhizopus arrhizus was obtained in the pyrene resistance gradient test. Comparative studies were carried out about the behavior of the germination process and the radial growth of the mutant and wild strains of R. arrhizus UCP 402. Sabouraud Sucrose and Yeast Malt Broth cultures containing pyrene (10 mg/L) induced the germination process of the sporangiospores of the wild and mutant strains of R. arrhizus. The radial growth of the strains was inversely proportional to the pyrene concentration in the culture medium. The results showed an adaptation of R. arrhizus UCP 402x (mutant) in the pyrene (50mg/L) and suggested a higher ability of application in the removal of pyrene from the contaminated areas.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pyrene; Rhizopus arrhizus; Mutant; Radial growth; Germination.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000300024

Characterization of pyrene utilizing Bacillus spp. from crude oil contaminated soil
Provedor de dados: 58
Autores: Khanna,Purnima; Goyal,Dinesh; Khanna,Sunil.
Pyrene, a high molecular weight polycyclic aromatic hydrocarbon (PAH), is a priority pollutant present in soil contaminated with crude oil, coal-tar and complex PAHs. Bacterial consortium CON-3 developed from crude oil contaminated soil of Patiala, Punjab (India) cometabolized 50 µg ml-1 pyrene in the presence of glucose (0.5 %; w/v) at 30 °C, as determined by reverse-phase high performance liquid chromatography (HPLC). Bacillus sp. PK-12, Bacillus sp. PK-13 and Bacillus sp. PK-14 from CON-3, identified by 16S rRNA gene sequence analysis, were able to cometabolize 64 %, 55 % and 53 % of pyrene in 35 days, respectively. With the increase in glucose concentration to 1.0 % (w/v) in growth medium isolates PK-12, PK-13 and PK-14 showed 19 - 46 % uptake of 50 µg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pyrene; Bacillus; Crude oil contaminated soil; High performance liquid chromatography (HPLC).
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000200024