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| Registros recuperados: 101 | |
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| Aguiar,Ana Carolina de; Boroski,Marcela; Bonafé,Elton Gutendorfer; Almeida,Vanessa Vivian de; Souza,Nilson Evelázio de; Visentainer,Jesuí Vergílio. |
| The objective of this study was to quantify alpha-linolenic acid (LNA, 18:3n-3) of dried wheat leaves, harvested at different development stages (20, 40 and 80 days), to determine the antioxidant potential and the total phenolic compounds of leaves harvested at 80 days, as well as to perform mineral analysis (Na, K, Fe, Ca, Mg, P, Zn, Cu and Mn). It was observed a predominance of polyunsaturated fatty acids (PUFA) compared to saturated fatty acids (SFA) in the lipid fraction of leaves. Leaves collected in all periods presented ratios of PUFA/SFA, omega-6 and omega-3 fatty acids (n-6/n-3) considered suitable for food. The highest content of LNA was found in leaves harvested at 60 days, corresponding to 2.146,72 mg 100 g-1 dried matter. The range time... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alpha-linolenic acid; Phenolic compounds; Antioxidant activity. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000400012 |
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| ALENCAR,DANIEL B. DE; DINIZ,JAÉCIO C.; ROCHA,SIMONE A.S.; PIRES-CAVALCANTE,KELMA M.S.; LIMA,REBECA L. DE; SOUSA,KAROLINA C. DE; FREITAS,JEFFERSON O.; BEZERRA,RAYSSA M.; BARACHO,BÁRBARA M.; SAMPAIO,ALEXANDRE H.; VIANA,FRANCISCO A.; SAKER-SAMPAIO,SILVANA. |
| ABSTRACT This study evaluated the chemical composition and antioxidant activity of fatty acids from the marine red algae Pterocladiella capillacea (S. G. Gmelin) Santelices & Hommersand 1997 and Osmundaria obtusiloba (C. Agardh) R. E. Norris 1991. The gas chromatography mass spectrometry (GC-MS) identified nine fatty acids in the two species. The major fatty acids of P. capillacea and O. obtusiloba were palmitic acid, oleic acid, arachidonic acid and eicosapentaenoic acid. The DPPH radical scavenging capacity of fatty acids was moderate ranging from 25.90% to 29.97%. Fatty acids from P. capillacea (31.18%) had a moderate ferrous ions chelating activity (FIC), while in O. obtusiloba (17.17%), was weak. The ferric reducing antioxidant power (FRAP) of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fatty acids; Antioxidant activity; Palmitic acid; Rhodophyta. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000100449 |
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| Almeida,Tânia Santos de; Araújo,Maria Eduarda Machado; Rodríguez,Lucía González; Júlio,Ana; Mendes,Beatriz Garcia; Santos,Rui Miguel Borges dos; Simões,José Artur Martinho. |
| The influence of common tea preparation procedures (temperature, infusion time, consumption time interval and tea bag/loose-leaf) and the type of water used, on the total phenolic content (TPC), the radical scavenging activity and the α-glucosidase inhibitory activity were assessed. Higher TPC and antioxidant activity were obtained when using lower mineralized waters. Tea bags also evidenced higher antioxidant activity than loose-leaf samples. Under the same conditions (90 ºC and five minutes of infusion time) green tea contains almost twice the quantity of polyphenols and the free radical scavenging ability of black tea. In the α-glucosidase assay all infusions were active (97-100 %). Furthermore, HPLC allowed to identify some of the polyphenols present... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Black tea; Green tea; Antioxidant activity; Α-Glucosidase activity; Water mineralization. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100529 |
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| ALPAY,MERVE; DULGER,GORKEM; SAHIN,IBRAHIM E.; DULGER,BASARAN. |
| Abstract: In this study, the antimicrobial, antioxidant and antitumor activity of ethanol extracts obtained from Phlomis russeliana (Sims.) Lag. ex Benth. (Lamiaceae) were evaluated. Disc diffusion and microdilution methods were used to test the extracts for antimicrobial activity against seven bacteria strains (Bacillus cereusATCC 7064, Bacillus subtilisATCC 6633, Staphylococcus aureusATCC 6538P, Escherichia coliATCC 10538, Proteus vulgarisATCC 6899, Salmonella typhimuriumCCM 5445 and Pseudomonas aeruginosaATCC 27853) and four yeast strains (Kluyveromyces fragilisATCC 8608, Rhodotorula rubraATCC 70403, Debaryomyces hanseniiDSM 70238 and Candida albicansATCC 10239). Notably, they were more effective against the yeast strains than the bacterial strains. Of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phlomis russeliana; Antioxidant activity; Cytotoxic effect; Antimicrobial activity; Endemic plant. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500604 |
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| Al-Reza,Sharif M.; Rokonuzzaman,M.; Afroz,Monira; Hussain,Md. Iqbal; Rashid,M. A.; Rahman,Atiqur. |
| ABSTRACT This study was designed to examine the chemical composition and in vitro antioxidant activity of the hydrodistillated essential oil and various extracts obtained from Premna integrifolia Linn. GC-MS analysis of the essential oil was resulted in determination 29 different compounds, representing 95.73% of total oil. Antioxidant activities of the essential oil and organic extracts of chloroform, ethyl acetate and methanol were determined by three different test systems namely DPPH (2,2-diphenyl-1-picrylhydrazyl), superoxide and nitric oxide radical scavenging assays. The essential oil and methanol extract showed potent antioxidant activity among all the tested samples. Furthermore, the amount of total phenolic compounds was determined and its... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Premna integrifolia Linn; Antioxidant activity; Essential oil; Total phenolics. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100203 |
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| Balois-Morales,Rosendo; Jiménez-Zurita,José Orlando; Alia-Tejacal,Irán; López-Guzmán,Graciela Guadalupe; Palomino-Hermosillo,Yolotzin Apatzingán; Sánchez-Herrera,Leticia Mónica. |
| Abstract The changes in concentration of vitamin C, enzymatic and antioxidant activity during the ripening of two soursop selections (G1 and G2) at room temperature (22 ºC) and refrigeration (15 ºC) with an HR 85% were evaluated. The content of soluble protein, the activity of catalase (CAT), superoxide dismutase (SOD), peroxidase (POD), the concentration of vitamin C, as well as the antioxidant activity was evaluated by DPPH, ABTS and FRAP methods. The initial soluble protein concentration of the G1 and G2 selections diminished at 22 and 15 °C during ripening. Fruits stored at 22 °C showed the highest CAT activity. The maximum activity of SOD was recorded on the sixth and fourth day in fruits stored at 22 and 15 ºC, respectively. Fruits stored at 22 °C... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Annona muricata; Ripening; Enzymatic activity; Antioxidant activity; Refrigeration. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000100303 |
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| Belisário,Celso Martins; Soares,Antônio Gomes; Coneglian,Regina Celi Cavestré; Plácido,Geovana Rocha; Castro,Carlos Frederico de Souza; Rodrigues,Lamonier Antônio Nery. |
| ABSTRACT: Native fruits are economically important to small producers, and they are a important part of the diet of several communities. Therefore, postharvest studies of these fruits are essential. In addition, research involving their chemical composition can identify substances that add potential value to the fruits, especially from a nutritional and medicinal standpoint. This study characterized the fruits of the muricizeiro shrub (Byrsonima crassifolia, Malpighiaceae), which were harvested from native plants on private properties and stored for 16 days at a mean temperature of 12 °C. The fruits were evaluated during storage for: 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, ascorbic acid content, phenolics and carotenoids total,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Postharvest; Native fruits; Byrsonima crassifolia; Malpighiaceae; Antioxidant activity. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000400751 |
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| Cardoso,Priscylla Maria Martins; Mazuco,Renata Alves; Macedo,Lucas Soares Dazzi; Polese,Ariele Abreu Venturini; Barroso,Maria Eduarda de Souza; Baratella,Waléria Gramilich; Andrade,Tadeu Uggere de; Lenz,Dominik; Pereira,Thiago de Melo Costa; Endringer,Denise Coutinho. |
| Contrast-induced nephropathy (NIC) is directly related to increased morbidity and mortality, and its treatment and prevention might be achieved by the administration of antioxidant products. The juçara palmetto (Euterpe edulis Martius) has fruits rich in phenolic compounds, which are known for their antioxidant activity. This work aimed to evaluate the nephroprotective activity of E. edulis pulp in the NIC animal model. The collected fruits were pulped, their contents of polyphenols and anthocyanins were quantified, and their antioxidant activity were evaluated. The nephroprotective effects were determined based on iodine contrast induction and evaluated by biochemical and histological analyses. The results showed that E. edulis pulp was rich in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nephroprotection; Euterpe edulis Martius; Polyphenols; Anthocyanins; Antioxidant activity. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100522 |
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| CARNEIRO,NÁRGELLA S.; ALVES,CASSIA C.F.; ALVES,JOSÉ M.; EGEA,MARIANA B.; MARTINS,CARLOS H.G.; SILVA,THAYNÁ S.; BRETANHA,LIZANDRA C.; BALLESTE,MAIRA P.; MICKE,GUSTAVO A.; SILVEIRA,EDUARDO V.; MIRANDA,MAYKER L.D.. |
| ABSTRACT Many essential oils (EOs) of different plant species possess interesting antimicrobial effects on buccal bacteria and antioxidant properties. Eugenia klotzschiana Berg (pêra-do-cerrado, in Portuguese) is a species of Myrtaceae with restricted distribution in the Cerrado. The essential oils were extracted through the hydrodistillation technique using a modified Clevenger apparatus (2 hours) and chemically characterized by GC-MS. The major compounds were α-copaene (10.6 %) found in oil from leaves in natura, β-bisabolene (17.4 %) in the essential oil from dry leaves and α-(E)-bergamotene (29.9 %) in oil from flowers. The antioxidant activity of essential oils showed similarities in both methods under analysis (DPPH and ABTS˙+) and the results... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant activity; Antibacterial activity; Brazilian pear; Drying; Eugenia klotzschiana; Sesquiterpenes. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401907 |
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| Cavalcante,Maisa D.; Belisário,Celso M.; Oliveira,Daniel Emanuel C. de; Maia,Geisa Priscilla A. G.. |
| ABSTRACT One of the factors that hinder the usability of Cerrado fruits is their perishable nature, requiring industrial processing to ensure prolonged shelf life. This study aims to determine the optimal foaming agent for industrial processing of this fruit, and to evaluate the physicochemical characteristics and antioxidant activity of dried cagaita powder (Eugenia dysenterica DC) in foam layers at temperatures of 40, 50, 60, and 70 °C. The effectiveness of three foaming agents at various concentrations were tested, and suitable agents were identified based on a factorial analysis of density, expansion, and stability. The physicochemical characteristics of the powder, along with its vitamin A and C and total carotenoid content and antioxidant activity,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cerrado fruits; Cagaita powder; Bioactive compounds; Antioxidant activity; Vitamin C; Vitamin A; Carotenoids; Foam layer drying. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162020000300381 |
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| Certain, Cassandre; Della Patrona, Luc; Gunkel-grillon, Peggy; Leopold, Audrey; Soudant, Philippe; Le Grand, Fabienne. |
| Cultivation of salt-tolerant crops help to face to irreversible global salinization of freshwater and soils. In New-Caledonia, three halophytes are candidates for saline crops, Salsola australis R.Br., Suaeda maritima (L.) Dumort and Enchylaena tomentosa R.Br. Their success and quality depend yet on availabilities of salinity and essential nutrients in agrosystems. So, we investigated effects of three salinities, i.e., control moderate and high, and five nitrogen ratios, i.e., 100:0, 75:25, 50:50, 25:75 or 0:100 NO3−-N:NH4+-N ratio on their growth and functional value for fatty acids and antioxidants. Results show that the leaf fatty acid and antioxidant profiles of species, emphasize their good potential to become functional crop products, based on... |
| Tipo: Text |
Palavras-chave: Halophyte; Salsola australis; Suaeda maritima; Enchylaena tomentosa; Salt tolerance; Nitrogen form; Fatty acid; Phenolic compounds; Antioxidant activity. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00682/79411/81960.pdf |
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| Chulaluck Charunuch; Plerncha Tangkanakul; Saovaluk Runggaeng. |
| Owing to creation of Thai rice snack with health benefits for higher potential in commercial scale, mulberry leaf was applied in the production of extruded snack product. Mulberry leaf in dried powder was mixed with rice, corn, soy, sugar, oil, vitamins and minerals to investigate the operating conditions with twin-screw extruder at varying mulberry content (5, 7.5 and 10%), screw speed (300 and 350 rpm) and feed moisture (13, 15 and 17%) in the 3 × 2 × 3 factorial experiment. The extrudates were examined of functional properties (antioxidant activity and phenolic compounds) and some physical characteristics (expansion ratio, bulk density, texture measurement and organoleptic test). The results had shown that at higher mulberry content (10%), the product... |
| Tipo: PhysicalObject |
Palavras-chave: Mulberry; Extruded snack; Antioxidant activity; Phenolic compounds; หม่อน; ฤทธิ์ต้านอนุมูลอิสระ; สารฟีโนลิก; เอ็กซ์ทรูดเดอร์; ผลิตภัณฑ์ขนมขบเคี้ยว; ผลิตภัณฑ์แปรรูปจากข้าว; คุณภาพทางประสาทสัมผัส. |
| Ano: 2006 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5256 |
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| Comlekcioglu,Nazan. |
| Abstract This study was undertaken to evaluate the health-promoting potentials of Isatis aucherii, Isatis buschiana, Isatis candolleana, Isatis tinctoria subsp. corymbosa and Isatis tinctoria. I. aucherii and I. candolleana are endemic, I. buschiana, I. tinctoria subsp. corymbosa are native in Turkey. While I. tinctoria is a well studied species, there is insufficient information about other endemic and native species. Therefore, this study is focused to reveal the bioactive compounds of poorly studied endemic and native species. In this context, protein, ash, glucosinolates, fatty acids, total phenolic and flavonoid content, and antioxidant activities were determined in leaf extracts. The highest protein and fatty oil contents were observed in I.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant activity; Fatty acids; Flavonoid; Glucosinolate; Isatis; Phenolic. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100411 |
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| Cortés,Soledad; Pulgar,Hugo; Sanhueza,Verónica; Aspé,Estrella; Fernández,Katherina. |
| The bark of Pinus radiata D. Don is recognized as a rich natural source of proanthocyanidins (PAs). Barks of Pinus radiata D. Don were extracted to produce a raw extract, and then purified to produce 4 fractions, with the aim of correlating its structural characteristics with the extract antioxidant capacity. The structural characterization was performed by acid catalysis in presence of phloroglucinol, foliowed by the detection of the components by High Precision Liquid Chromatography (HPLC). The subunits identified in the bark of Pinus radiata were: epicatechin- (4ß-2) - phloroglucinol (EC-P), catechin- (4á-2) - phloroglucinol (C-F) and (+) -catechin (C). The purified fractions showed different mean degree of polymerization (mDP), average molecular weight... |
| Tipo: Journal article |
Palavras-chave: Antioxidant activity; Bark; Pinus radiata; Tannins. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000200002 |
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| Damasceno,Carolina Sette Barbosa; Oliveira,Letícia Freire de; Szabo,Ellis Marina; Souza,Ângela Maria; Dias,Josiane Fatima Gaspari; Miguel,Marilis Dalarmi; Miguel,Obdúlio Gomes. |
| ABSTRACT The essential oil composition of the Ocotea bicolor, native plant of Brazil, was studied for the first time. The essential oil of the leaf was obtained by hydrodistillation and analyzed by GC/MS. The analytical procedure revealed a predominance of sesquiterpenes, δ-cadinene (7.39%), β-sesquiphellandrene (6.67%), β-elemene (5.41%) and α-cadinol (5,23%). The essential oil was submitted to brine shrimp toxicity evaluation, antioxidant and antibacterial tests. The antioxidant activity by the formation of phosphomolybdenum complex method presented positive results. The minimum inhibitory concentration (MIC) values were higher than 1000 μg/mL for the microorganisms tested. Toxicity activity revealed LC50 results of 40.10 (μg/mL), being toxic to the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ocotea bicolor/Oil essential/chemical composition; Lauraceae; Antioxidant activity; Biological activity. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502017000400615 |
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| Dawood, Mona Gergis. |
| Two field experiments were conducted during two successive seasons (2014/2015 and 2015/2016) at the Experimental Station of National Research Centre, Nubaria district, Beheira Governorate, Egypt, to study the effect of foliar treatment of quinoa plants with trehalose (Tre) (100µM and 500µM) on growth, photosynthetic pigments, seed yield quantity & quality, in fever of nutritional and antioxidant compounds in the yielded quinoa seeds which subjected to water deficiency (skipping two irrigation times at 50 & 60 days after sowing). Water deficiency caused marked decreases in quinoa plant growth parameters (shoot height, fresh and dry weights of shoot/plant) and photosynthetic pigments with marked increases in root growth parameters (root length, fresh... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant activity; Drought; Flavonoids; Oil; Phenolics; Protein; Quinoa; Trehalose. |
| Ano: 2018 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/4539 |
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| Registros recuperados: 101 | |
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