|
|
|
| Registros recuperados: 76 | |
|
|
| Dias, Thaís Gabrielle; Vilas Boas, Ana Carolina; Junqueira, Maria Beatriz Affonso; Lima, Luiz Carlos de Oliveira. |
| UV-C radiation is a food preservation method aimed to extend the life of the product, inactivate microorganisms, and stimulate the synthesis of phenolic compounds. This study aimed to physicochemically characterize and evaluate the antioxidant activity and phenolic content of ‘Gala’ apples subjected to different UV-C radiation doses.The fruits were harvested, sanitized, selected and inserted into a UV-C radiation chamber, and different radiation doses were applied as follows:0 KJ m-2 (0 min.), 0.68 KJ m-2 (2 minutes),2.73 KJ m-2 (4 minutes), and 4.10 KJ m-2 (6 minutes). The apples were stored for 120 days at 5 ± 1°C and analyzed after 0, 30, 60, 90, and 120 days of storage. Radiation doses had no influence on parameters, such as weight loss, firmness and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Malus sp.; Preservation; Quality; Bioactive compounds. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/30979 |
| |
|
|
| Kabiri, Ghizlane; Bouda, Said; Elhansali, Mohammed; Haddioui , Abdelmajid. |
| Biochemical composition and antioxidant activity were determined in kernel nuts for eleven Moroccan walnut (Juglans regia L.) accessions representing its main cropping area. Total oil, carbohydrates, crude protein, energy value, crude fiber and flavonoid have varied significantly between accessions, respectively within the range values of 54.50-65.48%, 8.17-19.25%, 11.5-25.58%, 648.91-713.83 Kcal, 4.17-6.75% and 12.59-62.11mg RE 100 g-1 DM. Besides, mineral composition (mg 100 g-1) of kernel have varied also significantly among accessions and particularly for phosphorus (338.1-675.87), copper (2.08-6.67), zinc (3.39-18.63), iron (1.17-2.64), chromium (0.16-0.20), nickel (1.26-1.45) and boron (0.07-1.49). However, dry matter (96.75-98.56%),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Variation; Proximate composition; Mineral composition; Bioactive compounds. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/46411 |
| |
|
|
| ALENCAR,DANIEL B. DE; SILVA,SUZETE R. DA; PIRES-CAVALCANTE,KELMA M.S.; LIMA,REBECA L. DE; PEREIRA JÚNIOR,FRANCISCO N.; SOUSA,MÁRCIA B. DE; VIANA,FRANCISCO A.; NAGANO,CELSO S.; NASCIMENTO,KYRIA S. DO; CAVADA,BENILDO S.; SAMPAIO,ALEXANDRE H.; SAKER-SAMPAIO,SILVANA. |
| Natural antioxidants found in marine macroalgae are bioactive compounds known to play an important role in the prevention of diseases associated with aging cells protecting them against the oxidative damage. The purpose of this study was to evaluate the antioxidant and cytotoxic activity of ethanolic extracts of two species of red seaweeds, Amansia multifida and Meristiella echinocarpa. In vitro antioxidant activity was determined by DPPH radical scavenging assay, ferric-reducing antioxidant power (FRAP) assay, ferrous ion chelating (FIC) assay, β-carotene bleaching (BCB) assay and total phenolic content (TPC) quantification. Cytotoxicity was evaluated with the brine shrimp Artemia sp. lethality test. The TPC values observed in the present study indicated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant; Bioactive compounds; Cytotoxic; Phenolic compounds; Rhodophyta. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100251 |
| |
|
|
| SILVA,LUIS FELIPE LIMA E; SOUZA,DOUGLAS C. DE; RESENDE,LUCIANE V.; NASSUR,RITA DE CÁSSIA M.R.; SAMARTINI,CAROLINA Q.; GONÇALVES,WILSON M.. |
| ABSTRACT The objective of this study was to characterize the nutritional compounds of interest present in vegetables known as non-conventional, in Brazil. The following evaluations were carried out: antioxidant activity, phenolic compounds, vitamin C, calories, carbohydrates, humidity, lipids, proteins, fiber, acidity and quantification of minerals (P, K, Ca, Mg, S, Cu, Fe, Mn, Zn and B). The species studied were Amaranthus hybridus L., Amaranthus viridis L., Basella alba L., Eryngium campestre L., Hibiscus sabdariffa L., Lactuca canadensis L., Rumex acetosa L., Stachys byzantina K. Koch, Tropaeolum majus L. and Xanthosoma sagittifolium L. Representative samples of plant structures of interest were harvested from each species suitable for human consumption... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioactive compounds; Food safety; Nutraceutical food; Traditional vegetables. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401775 |
| |
|
|
| LUGARESI,ADRIANA; UBERTI,ALISON; GIACOBBO,CLEVISON L.; LOVATTO,MAIKE; GIRARDI,GIAN C.; WAGNER JUNIOR,AMÉRICO. |
| Abstract The goal of this work was to evaluate blackberry cultivars in terms of productivity and bioactive compounds. Two experiments were conducted: in the first experiment four cultivars were evaluated (Cherokee, Guarani, BRS-Tupy and Xavante). In the second experiment, the effects of pruning management in the BRS-Tupy cultivar were evaluated with the following treatments: drastic winter pruning (zero primocane), and maintenance of two, three or four primocanes in the winter pruning. Vegetative, productive and fruit quality characteristics were determined, including measurement of bioactive compounds. Among the cultivars, the cultivar BRS-Tupy was superior in terms of productive characteristics, but for content of anthocyanins and flavonoids, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rubus sp; Primocane management; Bioactive compounds; Cultivars. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703879 |
| |
|
|
| BARROS,BÁRBARA R.S.; BARBOZA,BRUNO RAFAEL; RAMOS,BÁRBARA A.; MOURA,MAIARA C. DE; COELHO,LUANA C.B.B.; NAPOLEÃO,THIAGO HENRIQUE; CORREIA,MARIA TEREZA S.; PAIVA,PATRÍCIA MARIA G.; CRUZ FILHO,IRANILDO JOSÉ DA; SILVA,TÚLIO DIEGO DA; LIMA,CLÁUDIA S.A.; MELO,CRISTIANE M.L. DE. |
| Abstract: Currently, the research of new natural compounds with biological potential demonstrates great ethnopharmacological importance. In this study, we evaluated the biological properties promoted by saline extract from Malpighia emarginata DC leaves, whose objective is to evaluate the antioxidant, antimicrobial and cytotoxicity potential. Phytochemical characterization was performed by UPLC-MS chromatography to identify the chemical compounds. For the antioxidant potential, DPPH, ATT and FRAP methods were used. The antibacterial and antifungal tests were performed evaluating the MIC50, MIC90, CMB and CMF parameters. Moreover, antibiofilm action was evaluated. Cytotoxicity and proliferation were performed using splenocytes from Balb/c mice and were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioactive compounds; Cytotoxicity; Malpighia emarginata DC; Phytochemical. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000100627 |
| |
|
|
| MILANI,PAULA G.; FORMIGONI,MAYSA; DACOME,ANTONIO S.; BENOSSI,LIVIA; COSTA,CECÍLIA E.M. DA; COSTA,SILVIO C. DA. |
| ABSTRACT The aim of this study was to determine the composition and antioxidant potential of leaves of a new variety of Stevia rebaudiana (Stevia UEM-13). Stevia leaves of UEM-13 contain rebaudioside A as the main glycoside, while most wild Stevia plants contain stevioside. Furthermore can be multiplied by seed, which reduces the cost of plant culture techniques as other clonal varieties are multiplied by buds, requiring sophisticated and expensive seedling production systems. Ethanol and methanol were used in the extraction to determine the bioactive compounds. The methanolic extract was fractionated sequentially with hexane, chloroform, ethyl acetate and isobutanol, and the highest concentration of phenolic compounds and flavonoids was obtained in the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioactive compounds; Glycosides; Leaf extracts; Phenolic compounds; New cultivar of Stevia. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401841 |
| |
|
| |
|
|
| Ito,Vivian Cristina; Zielinski,Acácio Antônio Ferreira; Demiate,Ivo Mottin; Spoto,Marta; Nogueira,Alessandro; Lacerda,Luiz Gustavo. |
| Abstract The effects of gamma radiation (0, 1, 2 and 3 kGy) were used to evaluate the stability and thermal degradation kinetics of anthocyanins, as well as the stability of total phenolic compounds (TPC) and antioxidant activity at different temperatures (4, 25, 35 and 45 °C) during the storage (0, 30, 60, 90 and 120 days) of black rice flour. This flour can be used as ingredient for gluten-free cereal products with higher nutritional value. For this it is necessary to preserve the anthocyanin content during thermal processing and shelf-life periods. At time 0, the dose of 3 kGy provided all of the most available bioactive compounds, raising their antioxidant potential, except for TPC. During the storage at different temperatures up to 120 days, gradual... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anthocyanins; Bioactive compounds; Irradiation; Stability; Thermodynamic parameters; Pigmented rice. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100500 |
| |
|
| |
|
|
| Silva,Clédia Flores; Nardin,Patrícia; Grings,Mateus; Uecker,Julia Neitzel; Cerqueira,Jenifer Heller; Rincón,Joao Alvarado; Abib,Renata Torres; Schneider,Augusto; Barros,Carlos Castilho; Andreazza,Robson; Pieniz,Simone. |
| ABSTRACT This study aimed to evaluate the effect of Ilex paraguariensis infusion on redox state of Wistar rats submitted to high-fat and standard diet. Glutathione determination and lipid peroxidation in the hippocampus tissues and liver was performed, as well as the analysis of gene expression of superoxide dismutase, catalase and glutathione peroxidase by real-time polymerase chain reaction. The results from hippocampus showed that the groups fed with standard diet exhibited significant reduction of lipid peroxidation when supplemented with Ilex paraguariensis. The analysis from glutathione determination in the hippocampus showed a significant increase in glutathione activity in the group treated with high-fat diet and Ilex paraguariensis. In the liver,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ilex paraguariensis; Bioactive compounds; Oxidative stress; Antioxidant defense. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100328 |
| |
|
|
| Lima,Fernando Freitas de; Lescano,Caroline Honaiser; Oliveira,Elaine Florinda Rodrigues de; Fakhouri,Farayde Matta; Moraes,Izabel Cristina Freitas; Kassuya,Cândida Aparecida Leite; Sanjinez-Argandoña,Eliana Janet. |
| This study aimed microencapsulating Attalea phalerata Mart. oil, containing high carotenoid and phenolic compounds content, with Arabic gum and gelatin, using the complex coacervation method. The yield, efficiency, morphology of microcapsules and content of phenolic compounds, carotenoids and antioxidant activity in different processes conditions (concentration of the filling, temperature and agitation speed) were evaluated. The results showed 88% of yield, efficiency up to 70% and a characteristic size of microcapsules. The amount of carotenoids was high in crude oil (394.84 µg of carotenoids/g oil) and the microencapsulation tests showed amounts of 19.19 to 166.40 µg of carotenoids/g oil. The phenolic compounds in the crude oil were 20.73 mg GAE/g sample... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carotenoids; Phenolic compounds; Antioxidant activity; Bioactive compounds; Bioactive maintenance. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100580 |
| |
|
|
| Fernandes,Maurette dos Reis Vieira; Silva,Tales Alexandre Costa e; Pfenning,Ludwig Heinrich; Costa-Neto,Cláudio Miguel da; Heinrich,Tassiela Andréa; Alencar,Severino Matias de; Lima,Marisa Aparecida de; Ikegaki,Masaharu. |
| A total of 22 endophytic fungi isolated from coffee (Coffea arabica L.) were cultivated in vitro and their crude extracts tested. The screening was carried out using the agar diffusion method against Staphylococcus aureus, Escherichia coli and Candida albicans. The most effective isolate was Alternaria alternata, and subsequently, its extract was assayed. The total phenolic content was 3.44 μg GAE/mg of the crude extract. For the antibacterial and antifungal activity assays, minimum inhibitory concentrations (MIC) and minimum bactericidal and fungicidal concentrations (MBC and MFC) were determined. The ranges of MIC values were 50-100 μg/mL for S. aureus and 400-800 μg/mL for E. coli. The extract did not show activity in the tested concentrations for C.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Endophytic fungi; Bioactive compounds; Alternaria alternata/extract/antioxidant activity. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502009000400010 |
| |
|
|
| Vidal J,Leslie; Avello L,Marcia; Loyola C,Cristina; Campos P,Jorge; Aqueveque M,Pedro; R. Dungan,Stephanie; Galotto L,Maria; Guarda M,Abel. |
| Microencapsulation technology is an alternative to stabilize stress factors and protect food ingredients or additives, which include environmentally sensitive bioactive principles in protective matrices to increase their functionality and life span. The objective of this research was to study conditions to obtain microcapsules with antioxidant capacity from a maqui (Aristotelia chilensis [Molina] Stuntz, Elaeocarpaceae) leaf extract by emulsification and subsequent retention after microencapsulation. Microcapsules were produced by water-in-oil emulsion (W/O) using a phase of the aqueous maqui leaf extract and gum arabic, and a liquid vaseline phase. Maqui leaf extract antioxidant capacity was 99.66% compared with the aqueous phase of the emulsion at 94.38... |
| Tipo: Journal article |
Palavras-chave: Maqui; Antioxidant capacity; Bioactive compounds; Gum arabic. |
| Ano: 2013 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000100003 |
| |
|
|
| Sepúlveda,Elena; Sáenz,Carmen; Peña,Álvaro; Robert,Paz; Bartolomé,Begoña; Gómez-Cordovés,Carmen. |
| The bioactive compounds content in pomegranate (Punica granatum L.) juice is variable and depends on agronomic factors, genetic and fruit maturity. In Chile, the areas with this crop have increased more than 65% in the last 5 years. This paper aims to determine the phenolic composition, antioxidant capacity and chromatic parameters of juices from eight Chilean pomegranate genotypes (PG2 to PG9), containing red (PG2 to PG6) or pink arils (PG7 to PG9). Color, total polyphenol content (using Folin-Ciocalteu reagent), total anthocyanins (by differences in absorbance at different pHs of the juice) and antioxidant capacity (oxygen-radical absorbance capacity, ORAC) were determined. Anthocyanins were identified and quantify using HPLC-DAD and HPLC/ESI-MS, the... |
| Tipo: Journal article |
Palavras-chave: Polyphenols; Bioactive compounds. |
| Ano: 2010 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392010000100005 |
| |
|
|
| Ferreira,Talita de Oliveira; Costa,Rayssa Ribeiro da; Félix,Débora Tamara; Andrade Neto,Eugenio Ribeiro de; Cruz,Maísa de Macedo; Lima,Maria Auxiliadora Coêlho de. |
| ABSTRACT The Submedium São Francisco Valley is renowned for its particular conditions for cultivating grapes for different uses. The production of grapes for juice is relatively recent, and thus, knowledge is still limited on components of the production system. The aim of this study was to characterize the quality and antioxidant activity of ‘BRS Magna’ grapes in irrigated crops of the Submedium São Francisco River Valley under the influence of training systems and rootstocks, in production cycles of the first half of the year. The experiment was conducted in the Experimental Field of Bebedouro/Embrapa Semiárido, in Petrolina, Pernambuco, Brazil. The following were studied: overhead trellis, lyre, and vertical shoot positioning (VSP) systems and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioactive compounds; Quality; Hybrid grapes; Grapes for juice.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100215 |
| |
|
|
| Reis,Tamiris Aparecida Diniz dos; Conti,Antonio José de; Barrientos,Eliseo Alexander López; Mori,André Luiz Buzzo; Benassi,Marta de Toledo. |
| ABSTRACT Around 20% of Brazilian coffee production corresponds to defective beans (PVA), which decreases the quality of the coffee brews. Steam treatment has been reported as an alternative to improve the cup quality of coffee products. This research aimed to study the feasibility of using steamed Robusta PVA beans in instant coffee products. After the steam treatment (2 bar for 3 min), the Robusta PVA was dried, roasted, subjected to extraction in a pilot plant, and freeze-dried. The steamed and untreated Robusta PVA materials (raw, roasted, and instant coffees) and blends of instant Arabica coffee with PVA were characterized. The steamed Robusta PVA instant coffee presented 7.01 g caffeine and 8.74 g total chlorogenic acids in 100 g product. Instant... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Coffea canephora; Defects; Blends; Bioactive compounds; Steam treatment.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100248 |
| |
|
|
| SILVA,Edson Pablo da; SIQUEIRA,Heloisa Helena; DAMIANI,Clarissa; VILAS BOAS,Eduardo Valério de Barros. |
| Abstract The objective of this work was to characterize promising fruit crops and to explore opportunities for the sustainable and commercial use of flours obtained from fruits as an ingredient in snack bars. The fruit selected was Jeriva, which grow from north to eastern Brazil, and can be found in the Savanna biome. The fruit flour was obtained from dehydrated pulps and the proximate composition, dietary fiber, vitamin C, % scavenging free radicals, mineral composition, pH, ºBrix, titratable acidity and sensory analysis were determined. The flour was incorporated into the formulation by partial substitution of the standard ingredients of snack bars. The presence of increasing amounts (up to 20%) of Jeriva fruit flour resulted in sensory accepted snack... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Nutritional source; Chemical characteristics; Fiber content; Bioactive compounds; Queen palm. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612016000300421 |
| |
|
|
| Moraes,Érica Aguiar; Dantas,Maria Inês de Souza; Morais,Dayane de Castro; Silva,Cassiano Oliveira da; Castro,Fátima Aparecida Ferreira de; Martino,Hércia Stampini Duarte; Ribeiro,Sônia Machado Rocha. |
| The objective of this study was to evaluate the nutritional value, the oxidative stabilitiy, and consumer acceptance of cakes containing four different concentrations of flaxseed flour (5, 15, 30 and 45%) as partial replacement for wheat flour. The oxidative stability of polyunsaturated fatty acids was evaluated through the lipid peroxidation test (TBARS) in the flour and cakes. Linolenic acid was determined by gas chromatography as well as contents of protein, lipid, ash, and dietary fiber. Consumer acceptance was assessed using a structured hedonic scale of nine points. The oxidative stability of lipid flaxseeds was not affected by the heat treatment during flour processing and cake baking. Cakes made with 5, 15, and 30% of flaxseed flour, the most... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flaxseed flour; Cakes; Lipid peroxidation; Bioactive compounds; Acceptance. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612010000400021 |
| |
|
|
| DAVIES,Cristina Verónica; GERARD,Liliana Mabel; FERREYRA,María Mercedes; SCHVAB,María del Carmen; SOLDA,Carina Alejandra. |
| Abstract Citrus fruits are significant sources of bioactive compounds, such as ascorbic acid, polyphenols and carotenoids, due to their antioxidant properties important for human nutrition. In addition, since oranges possess high sugar content (8-15%), making vinegars from alcoholic orange substrates, with functional characteristics is a possible development of novel products. The aim of this research work was to analyze changes in ascorbic acid, total phenolics, total carotenoids and antioxidant activity during orange vinegar processing. In order to analyze the influence of acetification and aging in these characteristics, samples were taken in three stages: orange alcoholic substrate for acetification (SNA), young orange vinegar or recently obtained... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Orange vinegar; Antioxidant activity; Bioactive compounds. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612017000300449 |
| |
| Registros recuperados: 76 | |
|
|
|
