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| Registros recuperados: 117 | |
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| ZIELINSKI,Acácio Antonio Ferreira; ALBERTI,Aline; BONA,Evandro; BORTOLINI,Débora Gonçalves; BENVENUTTI,Laís; BACH,Fabiane; Demiate,Ivo Mottin; NOGUEIRA,Alessandro. |
| Abstract The consumption of yerba mate beverages is related to several health benefits. These desirable properties are mainly due to the bioactive compounds. However, the levels of those compounds are directly affected by factors such as geographical origin. This study aimed to use chemometrics to evaluate the antioxidant compounds of yerba mate (consumed as chimarrão) marketed in southern Brazil. Neochlorogenic acid and caffeine were the main bioactive compounds found in this type of yerba mate beverage (chimarrão). The dataset was analyzed by chemometrics, and principal component analysis using the first three principal components explained 61.30% of the total variance. Hierarchical cluster analysis suggested three clusters, with cluster 1 containing the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioactive compounds; Geographical origin; Chimarrão; HPLC; Pattern recognition. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612020005006204 |
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| El-Aziz,Tarek Mohamed Abd; Khoury,Sawsan Al; Jaquillard,Lucie; Triquigneaux,Mathilde; Martinez,Guillaume; Bourgoin-Voillard,Sandrine; Sève,Michel; Arnoult,Christophe; Beroud,Rémy; Waard,Michel De. |
| Abstract Background Sperm contains a wealth of cell surface receptors and ion channels that are required for most of its basic functions such as motility and acrosome reaction. Conversely, animal venoms are enriched in bioactive compounds that primarily target those ion channels and cell surface receptors. We hypothesized, therefore, that animal venoms should be rich enough in sperm-modulating compounds for a drug discovery program. Our objective was to demonstrate this fact by using a sperm-based phenotypic screening to identify positive modulators from the venom of Walterinnesia aegyptia. Methods Herein, as proof of concept that venoms contain interesting compounds for sperm physiology, we fractionated Walterinnesia aegyptia snake venom by RP-HPLC and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Snake venom; Walterinnesia aegyptia; Bioactive compounds; Fertility; Sperm motility; Venomics; Tandem mass spectrometry; De novo sequencing; Edman degradation. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992018000100301 |
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| Kirinus,Marines Batalha Moreno; Oliveira,Roberto Pedroso de; Silva,Pricila Santos da; Barreto,Caroline Farias; Malgarim,Marcelo Barbosa; Soares Filho,Walter dos Santos. |
| Abstract: The objective of this work was to evaluate the agronomic performance of 'Valência' sweet orange (Citrus sinensis) tree, in combination with 13 rootstocks cultivated in soil and climate conditions of the Brazilian state of Rio Grande do Sul. The following agronomic variables were evaluated: scion height and volume, plant production, production efficiency, productivity, fruit diameter, fruit mass, peel mass, juice yield, soluble solids content, titratable acidity, soluble solids:acidity ratio, ascorbic acid, peel color, antioxidant capacity, and phenolic compounds. A randomized complete block experimental design was used, with three replicates and nine plants per plot, in a two-factor arrangement (13 rootstocks and the 2015 and 2016 harvests). The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Citrus sinensis; Bioactive compounds; Fruit quality. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102700 |
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| CAVALCANTE, M. de A.; OLIVEIRA, J. dos S.; BARRETO, M. S. da S.; PINHEIRO, L. P.; CANTUÁRIA, P. de C.; BORGES, W. L.; SILVA, G. A. da; SOUZA, T. M. de. |
| Background: The Amazonian Region has a variety of medicinal plants with bioactive compounds, whose characterization could present the potential for sustainable development. Objectives: A method for separating, identifying, and quantifying a mixture of nine phenolic compounds (gallic acid, 3-hydroxybenzoic acid, p-coumaric acid, catechin, myricetin, rutin, quercetin, kaempferol, and cyanidin) was developed, validated, and applied to analyze aqueous and hydroethanolic extracts from Byrsonima crassifolia (L.) Kunth and Senna alata (L.) leaves. Materials and Methods: The separation was carried out by HPLC, using a Shim-pack VP-ODS C18 column (5 μm, 150 x 4.6 mm) at 40°C. Detection was performed at 254 nm and separation occurred in 35 min. Results: The... |
| Tipo: Artigo de periódico |
Palavras-chave: Compostos bioativos; Método cromatográfico; Extrato Vegetal; Cromatografia; Bioactive compounds; Plant extracts. |
| Ano: 2022 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1148941 |
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| Marques,Marcelo Rodrigues; Paz,Diego Damasceno; Batista,Lívia Patrícia Rodrigues; Barbosa,Celma de Oliveira; Araújo,Marcos Antônio Mota; Moreira-Araújo,Regilda Saraiva dos Reis. |
| This study assessed the antioxidant, total phenolic, and physicochemical properties of in vitro Terminalia Catappa Linn (locally called castanhola) using the DPPH assay. The castanhola fruits had an average weight of 19.60 ± 0.00 g, combining shell, pulp, and seed weight, and a soluble solids content of 8 °Brix. The chemical composition was determined with predominance of carbohydrates (76,88 ± 0,58%).The titration method was used to determine Vitamin C content using 2,6-dichlorophenolindophenol (DCFI), known as reactive Tillmans resulting in no significant levels. Aqueous extracts of castanhola pulp showed a higher concentration of phenolics, 244.33 ± 18.86 GAE.g-1 of fruit, and alcoholic extracts, 142.84 ± 2.09 GAE.g-1 of fruit. EC50 values of the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Tropical fruit; Functional properties; Bioactive compounds. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612012000100031 |
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| WOLFF, S. M.; SILVEIRA, A. C. da; LAZZAROTTO, M.. |
| O amido de Dioscorea bulbifera Linn, espécie conhecida também como cará moela, é um carboidrato pouco estudado. No entanto, a incorporação de extratos de erva-mate (Ilex paraguariensis) podem adicionar propriedades que agreguem valor ao produto. Este trabalho buscou adicionar extratos aquosos de erva-mate ao amido de D. bulbifera e avaliar os efeitos nas propriedades térmicas e reológicas. Assim, o amido nativo de D. bulbifera foi obtido e tratados com extrato aquosos de erva-mate em concentrações de 1,5%, 3% e 6%. Nas curvas TG, em atmosfera de ar sintético, dois eventos foram observados, no entanto a estabilidade e as propriedades térmicas do amido não foram alteradas significativamente. As temperaturas iniciais de gelatinização dos amidos incorporados... |
| Tipo: Anais e Proceedings de eventos |
Palavras-chave: Erva mate; Composto bioativo; TG-DSC; RVA; Ilex Paraguariensis; Composto Fenólico; Antioxidante; Phenolic compounds; Bioactive compounds; Antioxidant activity. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1115122 |
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| ANDRÉ, W. P. P.; PAIVA JUNIOR, J. R. de; CAVALCANTE, G. S.; RIBEIRO, W. L. C.; ARAÚJO FILHO, J. V. de; SANTOS, J. M. L. dos; ALVES, A. P. N. N.; MONTEIRO, J. P.; MORAIS, S. M. de; SILVA, I. N. G. da; OLIVEIRA, L. M. B. de; ABREU, F. O. M. da S.; BEVILAQUA, C. M. L.. |
| Abstract: The objective of this study was to evaluate the efficacy of carvacryl acetate (CVA) and nanoencapsulated CVA (nCVA) on gastrointestinal nematodes of sheep. The CVA was nanoencapsulated with chitosan/gum arabic and the efficacy of nanoencapsulation (EE), yield, zeta potential, nanoparticle morphology and release kinetics at pH 3 and 8 were analyzed. Acute and subchronic toxicity were evaluated in rodents and reduction of egg counts in the faeces (FECRT) of sheep. The sheep were divided into four groups (n = 10): G1, 250 mg/kg CVA; G2, 250 mg/kg nCVA; G3, polymer matrix and G4: 2.5 mg/kg monepantel. EE and nCVA yield were 65% and 57%, respectively. The morphology of the nanoparticles was spherical, size (810.6±286.7 nm), zeta potential in pH 3.2... |
| Tipo: Artigo de periódico |
Palavras-chave: Quitosana; Biocompostos; Acetilação; Nematoide gastrintestinal; Acetato de carvacrila; Segurança toxicológica; Biocompounds; Toxicological safety; Gastrointestinal parasitic nematodes; Ovino; Haemonchus Contortus; Helminto Gastrintestinal; Goma Arábica; Anti-Helmíntico; Parasitose; Chitosan; Gum arabic; Acetylation; Nematode control; Essential oils; Bioactive compounds. |
| Ano: 2020 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1125192 |
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| SHAHAB, M.; ROBERTO, S. R.; AHMED, S.; COLOMBO, R. C.; SILVESTRE, J. P.; KOYAMA, R.; SOUZA, R. T. de. |
| In colored table grapes, the anthocyanin contents are inhibited by the high temperature during ripening and berries suffer a lack of skin color, thus affecting their market value. In order to overcome this issue, a research study was planned to evaluate the influence of (S)-cis-abscisic acid (S-ABA) on rates of anthocyanin accumulation in table grapes when applied at different timings of ripening, and to quantify the gradual increase of berry color. The study was conducted in a commercial vineyard of ?Benitaka? table grapes (Vitis vinifera L.), grown under double annual cropping system in a subtropical area. The trials were carried out during two consecutive seasons (i.e., summer season of 2015 and off-season of 2016). The treatments used for the... |
| Tipo: Artigo de periódico |
Palavras-chave: Vitis vinifera L; Production system; S-ABA; Rate of anthocyanin accumulation; CIRG; Bioactive compounds. |
| Ano: 2019 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1118223 |
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| Manilal,A; Sujith,S; Selvin,J; Shakir,C; Seghal Kiran,G. |
| The antibacterial property of the red algae, Falkenbergia hillebrandii (Born) collected from the southwest coast of India (Indian Ocean) was evaluated against three multidrug resistant human pathogens. Four different solvents: ethyl acetate, dichloromethane, methanol and phosphate buffer saline (PBS) were used with this purpose. Dried samples extracted with methanol showed broadest and highest antimicrobial activity when compared to other solvents. However, PBS extract showed no antibacterial activity. The highly active compounds red alga, F. hillebrandii were fractionated and purified using different chromatographic systems, including reverse phase HPLC and GCMS. The analysis revealed that the most abundant metabolite was the oleic acid (51.33%) followed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial activity; F. hillebrandii; Multidrug resistant human pathogens; Methanolic extract; Bioactive compounds. |
| Ano: 2009 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572009000200013 |
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| MELO, I. S. de; SOUZA, W. R.; SILVA, L. J.; SANTOS, S. N.; ASSALIN, M. R.; ZUCCHI, T. D.; QUEIROZ, S. C. do N. de. |
| Abstract: Aims: Epiphytic bacteria, isolated from Deschampsia antarctica, were screened for their potential to inhibit the plant pathogen Botrytis cinerea, the causal agent of gray mold disease of strawberry pseudofruits. This phytopathogenic fungus is more active and the disease is more serious in temperate climate where the temperatures are lower. |
| Tipo: Separatas |
Palavras-chave: Compostos bioativos.; Botrytis cinerea; Bactéria; Controle biológico; Deschampsia antarctica; Pseudomonas frederiksbergensis; Antifungal agents; Bioactive compounds; Diketopiperazines; Psychrophilic bacteria.. |
| Ano: 2016 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1054794 |
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| Ferreira,Maria Jaiana Gomes; Nogueira,Patrícia Coelho do Nascimento; Dias,Flayanna Gouveia Braga; Silva,Larissa Morais Ribeiro da; Silveira,Edilberto Rocha; Figueiredo,Evânia Altina Teixeira de. |
| ABSTRACT: The plant, Amburana cearensis A. C. Smith (Fabaceae), commonly called cumaru, is widespread in the Caatinga cearense, a less known ecosystem in Brazil. A. cearensis is rich in several compounds like protocatechuic acid, tannins, coumarin, flavonoids and phenolic heterosides, such as amburosides A and B, that have been isolated. The aim of this study was to determine the antimicrobial potential and draw the chemical profile of the distinct characteristics of A. cearensis stem bark decoction, for its possible potential as a food conservation agent. The chemical compounds were characterized by one- and two-dimensional 1H and 13C NMR analyses and Liquid Chromatography-Mass Spectrometry (LCMS). The compounds of coumarin, amburosides A and B, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioactive compounds; Microorganisms; Natural antimicrobials. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000300452 |
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| 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 |
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| Sandri,Ivana Greice; Piemolini-Barreto,Luciani Tastch; Fontana,Roselei Claudete; Silveira,Mauricio Moura da. |
| In the present study, the effect of pectinases on the production of pulp and juice of araçá and the presence of bioactive compounds were evaluated. An enzyme extract (EE) produced by Aspergillus niger LB-02-SF in solid state fermentation and the commercial enzyme Ultrazym®AFP-L were used in this study. After enzyme treatment with the EE preparation, the extraction yield increased by 23.1% and viscosity decreased by 42.8%, during pulp maceration. During juice processing, there was an increase of 70.6% in clarification and a decrease of 72.87% in turbidity. Higher values of these parameters, 47.7, 69.0, 80.7, and 79.7%, respectively, were obtained using the Ultrazym®AFP-L, which also led to a significant increase in the polyphenol content, both in the pulp... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aspergillus niger; Yield; Clarification; Bioactive compounds. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612014000400002 |
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| Duarte,Patrícia Fonseca; Chaves,Marcia Alves; Borges,Caroline Dellinghausen; Mendonça,Carla Rosane Barboza. |
| ABSTRACT: This study aimed to present a literature review about the characteristics, applications, and potential of avocado (Persea americana). Avocado is considered one of the main tropical fruits, as it contains fat-soluble vitamins which are less common in other fruits, besides high levels of protein, potassium and unsaturated fatty acids. Avocado pulp contains variable oil content, and is widely used in the pharmaceutical and cosmetics industry, and in the production of commercial oils similar to olive oil. This fruit has been recognized for its health benefits, especially due to the compounds present in the lipidic fraction, such as omega fatty acids, phytosterols, tocopherols and squalene. Studies have shown the benefits of avocado associated to a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Avocado tree; Avocado oil; Unsaturated fatty acid; Bioactive compounds. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000400747 |
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| Dias,Flayanna Gouveia Braga; Ferreira,Maria Jaiana Gomes; Silva,Larissa Morais Ribeiro da; Menezes,Rayanne Clécia de Sousa; Figueiredo,Evânia Altina Teixeira de. |
| ABSTRACT Plant diversity around the world, as well as the chemical variation, involves a large amount of bioactive substances. The use of plant extracts with biological properties appears as a viable and healthy alternative when compared to synthetic substances. In this context, the objective of this study was to evaluate the aqueous extracts of native and cultivated leaves of Physalis angulata L., as well as the influence of the extraction method on the bioaccessibility of bioactive compounds, antioxidant activity and antimicrobial activity. The extracts were obtained from the native and cultivated leaves of P. angulata using three different extraction methods: decoction, maceration and an ultrasound-assisted method. The analysis of variance showed... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial potential; Antioxidant potential; Bioactive compounds. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902020000300411 |
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| Registros recuperados: 117 | |
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