isolation of phenolic antioxidant compounds by sfc at brazil
Isolation of phenolic antioxidant compounds by SFC
As a conclusion, the present study shows, for the first time, the possibility of separating phenolic compounds with antioxidant properties, such as carnosic acid, by SFC using coated packed capillary columns and pure CO 2. This work can be considered as a first step towards the optimization of separation conditions to fractionate complex extracts using a preparative scale SFC.
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Isolation of phenolic antioxidant compounds by SFC
The separation of polar compounds by supercritical-fluid chromatography (SFC) is reviewed. New developments in mobile and stationary phase tuning are reviewed for packed and packed capillary SFC.
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Isolation of phenolic antioxidant compounds by SFC, The
Isolation of phenolic antioxidant compounds by SFC Columns studied involved the use of commercial octadecylsilica particles (ODS) and silica particles coated with a stationary phase commonly used in gas chromatography, such as CW20M (polyethylene glycol) of high polarity.
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Phenolic compounds and anticancer activity of commercial
compounds. A bioguided study of the juice from culms of S. officinarum led to isolation of the flavone tricin-7--β-(6’’-methoxycinnamic)-O glycoside, which has shown considerable antiproliferative and antioxidant potential (Almeida et al. 2007). Other studies have shown that extracts of sugarcane leaves could improve health quality,
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Phenolic compounds and antioxidant activity of Brazil nut
The phenolic compounds present may have acted as free radical scavengers by virtue of their hydrogen-donating ability (Shahidi et al., 2007) and as soluble phenolic compounds are better assimilated in the body, the higher radical scavenging activity of the soluble phenolics in the Brazil nut may also be an indication of their better activity in ...
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Extraction of Phenolic Compounds from Palm Oil Processing
Agro-industrial byproducts are good sources of phenolic compounds and they have been explored as a source of natural antioxidants for the maintenance of nutritional quality through the stabilization or shelf life extension of lipids and lipid-containing food products.
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Chemical analysis, antioxidant, antichemotactic
Therefore, the aims of this study were to investigate the in vitro antioxidant and antichemotactic activities of different species of ferns from Southern and Southeastern Brazil and to evaluate the inhibitory effects displayed by ferns extracts on monoamine oxidase subunits A (MAO-A) and B (MAO-B) obtained from rat brain mitochondria. Chemical analysis was also carried out, by rapid performance liquid chromatography (RP-LC), on some active fern extracts that have still be little studied.
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Extraction and Analysis of Phenolic Compounds in Rice: A
As for the actual extraction phase, maceration is the most adopted procedure for the isolation of rice phenolic compounds. In the last years, a variety of polar solvent mixtures has been employed for this aim depending on the nature of the target analytes.
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Determination of Parameters for the Supercritical
Determination of Parameters for the Supercritical Extraction of Antioxidant Compounds from Green Propolis Using Carbon Dioxide and Ethanol as Co-Solvent. Machado BA(1), Barreto Gde A(2), Costa AS(2), Costa SS(2), Silva RP(2), da Silva DF(3), Brandão HN(3), da Rocha JL(3), Nunes SB(2), Umsza-Guez MA(4), Padilha FF(5).
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Extraction of bioactive compounds from genipap (Genipa
The endocarp + seeds and whole fruit were studied to determine if together these parts contain a high content of the bioactive compounds (iridoids, phenolic content and antioxidant activity), which would thus eliminate the cost and time required for separating the fruit into parts. After separation, each part was homogenized in a mixer.
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Isolation of phenolic antioxidant compounds by SFC | Request PDF
The antioxidant activity of phenolic compounds is related to the hydroxyl groups linked to the aromatic ring, which are capable of donating hydrogenThe approach of tuning the polarity of the stationary phase as a way of increasing the range of polar compounds analyzed by SFC using pure
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The antioxidant/anticancer potential of phenolic compounds
All of these phenolic substances are potent inhibitors of reactive oxygen species attack on, e.g. salicylic acid, 2-deoxyguanosine.However, using the newly developed methodology we can demonstrate that the antioxidant phenolic compounds present in olive oil are potent inhibitors of
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Isolation, structure elucidation and antioxidant potential
The major phenolic antioxidants in two types of brined olives were isolated and purified by semi-preparative high performance liquid chromatography. Structural analysis was conducted using UV spectrophotometry, mass spectrometry and nuclear magnetic resonance spectroscopy.
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Antioxidants, Phenolic Compounds, and - MAFIADOC.COM
Isolation and Characterization of Phenolic Antioxidants Antioxidants, Phenolic Compounds, and Nutritional Quality of Different Strawberry Genotypes SARA TULIPANI,† BRUNO MEZZETTI,‡ FRANCO CAPOCASA,‡ STEFANO BOMPADRE,§ JULES BEEKWILDER,# C. H. RIC DE VOS
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Antioxidant Activity of Phenolic Compounds | Antioxidant
Phenolic compounds act as antioxidants due to their capacity of transferring single-electron(2013) when comparing the antioxidant activity of canola phenolic compounds by in vitro assays(2011). Isolation and analysis of bioactive isoavonoids and chalcone from a new type of Brazilian propolis.
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Phenolic Compounds: Functional Properties, Impact of | IntechOpen
Phenolic compounds comprise one (phenolic acids) or more (polyphenols) aromatic rings with attachedSao Paulo State University, UNESP, Botucatu, Brazil. Maria Izabela Ferreira.The antioxidant activity of phenolic compounds is attributed to the capacity of scavenging free radicals
Send InquiryEvaluation of solvent effect on the extraction of phenolic compounds
The chemical nature of phenolic compounds, the extraction method employed, the sample particle size, storage time and conditions, as well asThis work is the first attempt to identify the best solvents in the extraction of antioxidant compounds from three different berries cultivated in southern Brazil.
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Recovery of Phenolic Antioxidants and Functional Compounds from
The recovery process of the phenolic compounds from the coffee industry by-productsThis is the first report on the isolation of bioactive and functional compounds from coffee by-products and can be a source of new value-added products such as phenolic antioxidant adjunct for food processing.
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Phenolic Antioxidant - an overview | ScienceDirect Topics
Among phenolic antioxidant compounds, especially flavonoids offer an intriguing promise, as they are typically both ROS scavenger and metal chelators, potentially offering double protection. Flavonoids are a class of polyphenol compounds found ubiquitously in food and beverages.
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Plants | Free Full-Text | Phytochemicals: Extraction, Isolation,
Therefore, extraction of phenolic compounds by ultrasound has grown during recent years due to its role in reducing the amount of solvent and energy used.Higher values of antioxidant activity have been obtained by using a methanolic solvent to extract the bioactive compounds from Anacardium
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