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| Registros recuperados: 91 | |
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| Cardoso,Claudia Andréa Lima; Coelho,Roberta Gomes; Honda,Neli Kika; Pott,Arnildo; Pavan,Fernando Rogério; Leite,Clarice Queico Fujimura. |
| Serjania erecta Radlk.(Sapindaceae) is a medicinal plant traditionally used in Brazil. We assayed the ethanolic extract of leaves and roots against seven microorganisms. The REMA (Resazurin Microtiter Assay) assay was used to measure the biological activity in vitro against Mycobacterium tuberculosis and our results showed moderate activity of the ethanolic extract. On the other hand S. aureus, P. aeruginosa, S. setubal, C. albicans, S. cerevisiae and E. coli revealed that the leaves and roots of S. erecta inhibited the growth of all microorganisms. The ethanolic extracts of leaves and roots showed low values of antioxidant activities. The ethanolic extracts of leaves and roots were analyzed by chromatographic and spectrometric methods. (-)-Epicatechin,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Serjania erecta Radlk/pharmacognosy; Serjania erecta Radlk/ethanolic extract; Serjania erecta Radlk/antioxidant activity; Serjania erecta Radlk/ethanolic extract; Serjania erecta Radlk/antimicrobial activity; Sapindaceae/pharmacognosy; Cipó-cinco-folhas/pharmacognosy; Flavonoids; Medicinal plants. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502013000400017 |
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| D’abadia,Ana Claudia Alves; Costa,Ana Maria; Faleiro,Fábio Gelape; Malaquias,Juaci Vitória; Araújo,Francisco Pinheiro de. |
| Abstract Passiflora cincinnata Mast. or Caatinga passion fruit is widely cultivated in the northeastern semi-arid regions of Goiás, Minas Gerais, and Bahia. The system of cultivation and field management of the Passiflora species affects the physicochemical quality of its fruits. In this study, we evaluated the chemical and physico-chemical characteristics of the fruits of 2 progenies (CPEF2220 and CBAF2334) of P. cincinnata species using the vertical and horizontal trellis system. Fruits were collected from the plants at their physiological maturation stage and tested for the fruit skin color and texture and the pH, total soluble solids, titratable acidity, pulp acidity ratio, and the contents of flavonoids, anthocyanins, and polyphenols in the seedless... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flavonoids; Coloration; Polyphenols; Acidity. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000600901 |
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| Amarante,Cassandro Vidal Talamini do; Souza,Alexandra Goede de; Benincá,Thalita Dal Toé; Steffens,Cristiano André; Ciotta,Marlise Nara. |
| Abstract: The objective of this work was to characterize entire flowers of the feijoa (Acca sellowiana) genotypes 'Alcântara', 'Helena', 'Mattos', 'Nonante', and the accession 2316 for dry matter, total antioxidant activity (TAA), and the contents of soluble solids, ascorbic acid, total anthocyanins, total flavonoids, and total phenolic compounds (TPC), as well as for the petal surface areas and colors. The TAA was quantified by the ABTS and DPPH methods. Flowers of the accession 2316 and of the cultivars Alcântara and Helena showed the highest contents of anthocyanins and flavonoids, as well as the highest values of TPC and TAA. The feijoa genotypes cultivated in Southern Brazil show high contents of soluble solids and represent a natural source of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acca sellowiana; Anthocyanins; Ascorbic acid; Flavonoids; Soluble solids; Total antioxidant activity; Total phenolic compounds. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000102701 |
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| Oliveira,Ademir Kleber M; Rizzi,Elvia Silvia; Pereira,Kelly Cristina L; Bono,José Antônio M; Matias,José Carlos Pina; Rosemary. |
| ABSTRACT The use of plant extracts can be an alternative to reduce the use of pesticides, to control diseases and pests that affect agricultural production. The aim of this study was the chemical characterization of the extract and fractions of Pouteria ramiflora leaves and to determine its fungistatic potential on Lasiodiplodia theobromae. The ethanolic extract of dried and crushed leaves was obtained by maceration. Part of this extract was sequentially partitioned and the following fractions were obtained: hexane, dichloromethane, chloroform, ethyl acetate, n-butyl, and hydromethanol for subsequent bioassay, and qualitative and quantitative phytochemical analysis. Experimental development comprises of adding a L. theobromae mycelial disk (5 mm), obtained... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pathogen; Natural products; Organic farming; Flavonoids. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362017000400564 |
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| Kalegari,Milena; Miguel,Marilis Dallarmi; Dias,Josiane de Fátima Gaspari; Lordello,Ana Luísa Lacava; Lima,Cristina Peitz de; Miyazaki,Cristina Mayumi Sasaki; Zanin,Sandra Maria Warumby; Verdam,Maria Christina dos Santos; Miguel,Obdulio Gomes. |
| Most active plants are toxic at high doses and it is therefore important to investigate the preliminary toxicity of plant extracts. The Rourea induta species is a potential drug with no phytochemical or biological studies registered in the literature. Thus, a phytochemical study and a toxicity analysis of the ethanolic extract obtained from the leaves of Rourea induta Planch., Connaraceae, was run. A long chain hydrocarbon, n-tetracosane, and four flavonoids were identified: quercetin, and three glycosylated derivates, quercetin-3-O-α-arabinofuranoside, quercetin-3-O-β-xyloside and quercetin-3-O-β-galactoside. This is the first time these have been isolated in this species. The structures were elucidated by 13C NMR, ¹H NMR, UV and IR spectroscopy. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rourea induta/phytochemistry; Connaraceae/phytochemistry; Flavonoids; N-tetracosane; Plant extracts/toxicity. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502011000300023 |
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| Vera-Guzmán,Araceli Minerva; Chávez-Servia,José Luis; Carrillo-Rodríguez,José Cruz; G. López,Mercedes. |
| Reports of the last decade show that some types of food and spices included in the human diet, such as pepper (Capsicum annuum L.) can have a positive effect on human health. The Mexican pepper germplasm is poorly documented with regard to variety and the amount of phytochemical compounds that it contains. In the present study, the variation of phytochemical compounds was evaluated in nine fruit variants (morphotypes) of wild and cultivated pepper grown in Oaxaca. ANOVA detected significant differences among pepper morphotypes and ripeness stages of fruits; vitamin C, total phenols, flavonoids, P-carotene, coordinated chromatic of color, and capsaicinoids. The highest values of vitamin C were found in 'Tabaquero', 'Guero' and 'Costeño' morphotypes (151.6... |
| Tipo: Journal article |
Palavras-chave: Capsaicionids; Carotenoids; Phenols; Flavonoids; Vitamin C. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000400013 |
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| GIRARDI,FELIPE A.; TONIAL,FABIANA; CHINI,SILVIA O.; SOBOTTKA,ANDRÉA M.; SCHEFFER-BASSO,SIMONE M.; BERTOL,CHARISE D.. |
| The phytochemical profile and antimicrobial activity of cultivar (cv.) extracts of Lotus uliginosus (cvs. Trojan and Serrano), L. tenuis (cv. Larrañaga) and L. corniculatus (cv. São Gabriel) were investigated. The phytochemical analysis revealed tannins, coumarins and flavonoids in all extracts, with variations among cultivars, showing genotypic variability. By High Performance Liquid Chromatographic method, the cvs. Larrañaga and São Gabriel showed the highest percentage of catechin and epicatechin, respectively, and presented rutin, which was not detected in the other ones. These genotypes showed antifungal activity but not antibacterial one. The cv. Larrañaga inhibited the mycelia growth of Alternaria sp. and Fusarium graminearum while the cv. São... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Alternaria; Flavonoids; Fusarium; Tannins. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301295 |
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| Santos,Geraldo Tadeu dos; Schogor,Ana Luiza Bachmann; Romero,Jakeline Vieira; Lima,Luciano Soares de; Matumoto-Pintro,Paula Toshimi; Grande,Paula Adriana; Kazama,Daniele Cristina da Silva; Santos,Fabio Seiji dos. |
| Four lactating Holstein cows were assigned to a 4 × 4 Latin square design to determine the effects of feeding sticky coffee hull (SCH) as a source of antioxidants on dairy cows fed with high PUFA diets. The treatments (on DM basis) were control diet, diet with 30 g/kg of soybean oil, diet with 30 g/kg of soybean oil and 100 g/kg of SCH, and diet with 30 g/kg of soybean oil and 150 g/kg of SCH. Inclusion of 150 g/kg of SCH decreased the crude protein digestibility. Lower values of NDF digestibility were also observed when cows were fed with 100 g/kg and 150g/kg of SCH. The digestibility of NDT was lower in the control and 150 g/kg of SCH diets. Milk production and composition did not differ among the treatments. Inclusion of SCH increased the total... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: By-product; Coffea arabica; Digestibility; Flavonoids; Milk stability; Polyphenols. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000400493 |
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| Milech, Cristini; Lucho, Simone Ribeiro; Kleinowski, Alítcia Moraes; Dutra, Débora Barwaldt; Soares, Mariana Mühlenberg; Braga, Eugenia Jacira Bolacel. |
| Among the compounds produced by plants, pigments such as betalains have received attention from both food and pharmaceuticals industries. The Alternanthera sessilis species produces these pigments, though in small quantities, and so it is necessary to increase production. Thus, many studies use elicitors that are capable of triggering physiological or morphological responses in plants. The objective was to establish callus production in A. sessilis grown under different combinations of growth regulators and light qualities and to assess whether these factors can increase betalain and flavonoid production. Leaf and internodal explants in MS medium with different growth regulators were used to obtain calli, which were subsequently transferred to a betacyanin... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Betalain; Flavonoids; Secondary metabolites; Medicinal plants.. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/36312 |
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| Soares, Jefferson de Jesus; Rosa, Anderson da Silva; Motta, Paola Ribeiro; Cibin, Francielli Weber Santos; Roehrs, Rafael; Denardin, Elton Luís Gasparotto. |
| The aim of this study was to evaluate the protective effect of three different extracts prepared from Syzygium cumini leaves against paraquat-induced toxicity in Saccharomyces cerevisiae strains deficient in superoxide dismutase (SOD). Additionally, the extracts phenolic and flavonoid contents, in vitro antioxidant activity, and phytochemical composition (using high-pressure liquid chromatography) were determined. Bioactive compounds from S. cumini leaves were extracted with infusion (traditional method) or ultrasound (aqueous or hydroalcoholic). Compared to the infusion extract, the ultrasound extracts exhibited a greater protective capacity against paraquat toxicity in the yeast cells as well as higher antioxidant activity. These results may be directly... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Traditional medicine; Antioxidant activity; Phenolic compounds; Flavonoids; Syzygium cumini; Saccharomyces cerevisiae.. |
| Ano: 2019 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/47139 |
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| FONTOURA,Fernanda Mussi; MATIAS,Rosemary; LUDWIG,Juliane; OLIVEIRA,Ademir Kleber Morbeck de; BONO,José Antonio Maior; MARTINS,Pedro de Figueiredo Rocha Barbosa; CORSINO,Joaquim; GUEDES,Neiva Maria Robaldo. |
| In the Southern Pantanal, the hyacinth macaw (Anodorhynchus hyacinthinus), an endangered species, often chooses the manduvi tree (Sterculia apetala) as a nesting site, because of its physical properties. In addition, the chemical composition of the wood may also contribute to a nesting selection by the hyacinth macaws. The objective of this study was to determine the main chemical components of S. apetala bark for two seasons, and evaluate its fungicidal potential. Bark samples from S. apetala trees with and without nests of A. hyacinthinus were collected in January (wet season) and August (dry season) of 2012. The inhibition of mycelium growth (MGI) from tree samples with and without nests were assessed using a phytochemical analysis to evaluate their... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Manduvi; Anodorhynchus hyacinthinus; Trichoderma sp.; Secondary metabolites; Flavonoids. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672015000300283 |
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| OLIVEIRA,DÉBORA R. DE; NEPOMUCENO,DELCI D.; CASTRO,ROSANE N.; BRAZ FILHO,RAIMUNDO; CARVALHO,MÁRIO G. DE. |
| ABSTRACT This study aims to identify special metabolites in polar extracts from Urochloa humidicola (synonym Brachiaria humidicola) that have allelopathic effects and induce secondary photosensitization in ruminants. The compounds were isolated and identified via chromatographic and spectroscopic techniques. The compounds 4-hydroxy-3-methoxy-benzoic acid, trans-4-hydroxycinnamic acid, and p-hydroxy-benzoic acid; the flavonols isorhamnetin-3-O-β-d-glucopyranoside and methyl quercetin-3-O-β-d-glucuronate; and kaempferitrin, quercetin-3-O-α-l-rhamnopyranoside, and tricin were identified in the extract from the leaves of Urochloa humidicola. Two furostanic saponins, namely, dioscin and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Brachiaria humidicola; Flavonoids; Steroidal saponins; Urochloa. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000300789 |
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| Rodríguez-Amado,Jesús; Pérez Rosés,Renato; Escalona-Arranz,Julio César; Lafourcade Prada,Ariadna; Sierra González,Gustavo. |
| Introduction: Tamarindus indica L or Tamarind as commonly known is a medicinal plant witha broad spectrum of application in medicine. Tamarind is the most useful plant for liver disorders treatment in Cuba and The Caribbean. People use it as decoction and have to take up to four liters a day of this preparation, because the use of alcohol in the Tamarind fluid extracts prevent its use in patient with lever desorders. Objective: the aim of this study was the preliminary establisment of quality control parameters of the Tamarindus indica L. soft extract as a novel alcohol-free active ingredient for solids pharmaceutical formulation. Methods: organoleptics properties, total solids, relative density, pH, and total ashes were stablished. The polyphenols content... |
| Tipo: Journal article |
Palavras-chave: Soft extract; Polyphenols; Flavonoids; Antioxidant; Tamarind; Tamarindus indica. |
| Ano: 2012 |
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1028-47962012000100012 |
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| Devia,Cristina M.; Pappano,Nora B.; Debattista,Nora B.. |
| The bacteriostatic activity of 2,4,2-trihydroxychalcone; 2,4,3-trihydroxychalcone and 2,4,4-trihydroxychalcone, prepared by condensation of 2,4-dihydroxyacetophenone and benzaldehyde substituted, against Staphylococcus aureus ATCC 25923 was assayed by agar plate method. The three compounds presented important inhibition halos. In order to elucidate structure-activity relationships, the minimal inhibitory concentrations against S. aureus were determined by the broth dilution method and the results obtained were compared to that of 2',4'-dihydroxychalcone. The sequence observed was: MIC 2,4,3-(OH)3 > MIC 2,4-(OH)2 > MIC 2,4,4-(OH)3 > > MIC 2,4,2-(OH)3. These results showed that the introduction of an electron... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bacteriostatic activity; Structure-activity relationship; Flavonoids; Trihydroxylated chalcones. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141998000400014 |
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| Jin,Qing-Hao; Fu,Zhi-Yang; Xia,Ya-Nan; Liu,Bing-Yu; Jiang,Hai-Ying. |
| In the present study, a series of novel 5,7-diisoprenyloxyflavone derivatives were designed, synthesized, and evaluated for their antibacterial activity. Most of these compounds displayed significant antibacterial effects against Gram-positive bacteria, especially against strains of multidrug-resistant clinical isolates. Compounds 4c, 4g, 4i, 4j, 4k, 4l, 4n, 4q and 4t showed high levels of antimicrobial activity against Staphylococcus aureus RN4220 with minimum inhibitory concentrations of 4.0-20 µM. Compound 4k showed the most potent activity among these compounds against all multidrug-resistant clinical isolates tested. Unfortunately, none of the compounds were active against Gram-negative bacteria at the doses of 24-164 µM. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flavonoids; Synthesis; Isoprenyloxyflavones; Antibacterial activity. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100541 |
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| Registros recuperados: 91 | |
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