Antiradical Assay
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. In vitro Antioxidant and Anticholinesterase Activities of Ouratea fieldingiana (Gardner) Eng. Leaf Extract and Correlation with Its Phenolics Profile with an in silico Study in Relation to Alzheimer’s Disease
Ouratea fieldingiana is a native medicinal plant from Northeastern Brazil and many biological properties are due to the phenolic constituents. The objective of this work was performing the characterization of O. fieldingiana leaf constituents to correlate with antioxidant and anticholinesterase activities by in vitro and in silico studies and thus contribute
Journal of the Brazilian Chemical Society. Publicado em: 2022
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2. Kinetic modeling and evaluation of free radical-scavenging behavior in oils: application to four tropical and subtropical fruits in a DPPH system
Abstract A kinetic model was developed to represent the radical-scavenging capacity (RSC) for the oxidation of oils. The model was developed using second-order rate constants (k2) to represent the RSC. The RSC of the oils can be compared by the k2 values indicating their scavenging capacity. Furthermore, the k2 values can be used to determine the decay kinet
Food Sci. Technol. Publicado em: 2020-06
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3. Potential of some autochthonous wild plants of Burundi for vegetable oil and valuable compounds production
Resumo Doze espécies de plantas indígenas foram estudadas para valorizar alguns recursos naturais do Burundi (África Oriental), para investigar as possibilidades de produção de óleo vegetal. As propriedades físico-químicas e o conteúdo de óleo foram determinados com base em sementes colhidas em cinco zonas ecogeográficas. A partir de extratos de b
Braz. J. Biol.. Publicado em: 02/12/2019
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4. Kinetic modeling and evaluation of free radical-scavenging behavior in oils: application to four tropical and subtropical fruits in a DPPH system
Abstract A kinetic model was developed to represent the radical-scavenging capacity (RSC) for the oxidation of oils. The model was developed using second-order rate constants (k2) to represent the RSC. The RSC of the oils can be compared by the k2 values indicating their scavenging capacity. Furthermore, the k2 values can be used to determine the decay kinet
Food Sci. Technol. Publicado em: 09/09/2019
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5. Characterization of biochemical and functional properties of water-soluble tempe flour
Abstract Characteristics of water-soluble flours from soy (SF), soy tempe (STF), and germinated-soy tempe (GTF) were compared with those of commercial soy protein isolate (SPI). Defatted flour of soy, soy tempe, and germinated soy tempe were extracted in alkaline water (pH 9) and freeze dried to produce water-soluble flours. Protein contents of SF, STF, and
Food Sci. Technol. Publicado em: 11/06/2018
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6. Evaluation of antiradical assays used in determining the antioxidant capacity of pure compounds and plant extracts
The efficiency of the chemiluminescence luminol method and colorimetric DPPH and ABTS methods in evaluating the antiradical capacity of pure compounds and plant extracts with antioxidant potential is compared. In case of pure compounds, the values of parameter 'n' (number of radicals quenched per molecule of antiradical) for ascorbic acid, p-hydroquinone, ca
Quím. Nova. Publicado em: 2014-06
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7. Determinação da capacidade antirradicalar de produtos naturais utilizando-se a quimiluminescência do luminol e ensaios fotométricos com radicais estáveis / Determination of natural product antiradical capacity using luminol chemiluminescence and photometric assays with stable radicals
Living organisms are exposed to the oxidative action of reactive oxygen species (ROS), causing a series of degenerative diseases such as cancer, atherosclerosis, diabetes, arthritis and heart disease. Studies have shown that consumption of antioxidant substances in the daily diet can prevent these oxidative processes that cause premature aging of the organis
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/09/2011
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8. Estudo Químico e Bioprospecção de Produtos da abelha Apis mellifera L. do Estado do Ceará / Study Chemical Products and Bioprospecting bee Apis mellifera L. Ceará State
Ceará is one of the largest producer and exporter of Apis mellifera L. honey in Brazil but there is little information about its physical and chemical properties and biological activities. The main aim of this thesis is the chemical study and bioprospection of honeys, propolis and pollen produced by Apis mellifera L. in Ceará State, as manner of to obtain
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/03/2011
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9. Identificação de alguns constituintes químicos de Indigofera hirsuta Linn. (Fabaceae) por CLAE-IES-EM (TOF) e avaliação da atividade antirradicalar
A rapid analytical approach, suitable to characterize the compounds present in the aqueous and methanol extracts prepared from the aerial parts of Indigofera hirsute, was developed. The method based on high-performance liquid chromatography coupled to mass spectrometry, electrospray positive ionization and detection by time of flight (HPLC-ESI-MS-TOF) identi
Química Nova. Publicado em: 2011
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10. AGREGACAO DE VALOR A PLANTAS DO GENERO SPONDIAS: PROSPECCAO DE PROPRIEDADES ANTIVIRAIS, ANTIOXIDANTES E ANTIMICROBIANAS. / Adding Value to PLANTS Spondias genus: PROSPECTION antiviral properties, ANTIOXIDANT AND ANTIMICROBIAL.
In Ceará there are two native Spondias species: S. mombin and S. tuberosa,commonly known as cajá and umbu, respectively. These plants are popularly used for various medicinal purposes. The medicinal properties are often related to the power of their phenolic compounds. The aim of this study was to evaluate the antioxidant,antimicrobial and antiviral, relat
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/12/2010
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11. Chemiluminescent oxidation of luminol in micellar media: development of an anti-radical capacity assay / Oxidação quimiluminescente do luminol em meios micelares: desenvolvimento de uma ensaio para determinação da capacidade anti-radicalar
In this work, a methodology to evaluate the anti-radical capacity of hydrophilic and lipophilic compounds based on luminol chemiluminescence in micellar media was developed. The reaction of luminol, hemin and hydrogen peroxide was studied in the presence of charged surfactants (CTAB/CTAC and SDS). The concentration of each reagent was independently varied in
Publicado em: 2008
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12. Carotenoides e compostos bioativos : relação com propriedades anti-radical livre e corante em frutas tropicais / Carotenoids and bioactive compounds : relationship between free radical scavenger properties and color in tropical fruits
The increased demand for high life quality has been associated to healthy food, increasing the industry interest for functional foods, which are defined as any food or bioactive compounds with potential to be benefic for the consumer health. The bioactive compounds found in foods, such as carotenoids, phenolic compounds and ascorbic acid (AA) are involved wi
Publicado em: 2008