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| Registros recuperados: 103 | |
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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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| FUNARI,Cristiano S.; ALMEIDA,Letícia de; PASSALACQUA,Thais G.; MARTINEZ,Isabel; AMBRÓSIO,Daniela L.; CICARELLI,Regina Maria B.; SILVA,Dulce Helena S.; GRAMINHA,Márcia A. S.. |
| ABSTRACT Leishmaniasis and Chagas disease affect millions of people in tropical and subtropical regions. Drugs used currently to treat such diseases often present undesirable side effects and low efficiency. The aim of this work was to identify extracts and isolated compounds from the genus Lippia with leishmanicidal and trypanocidal activity. Fifteen extracts from different plant parts of Lippia species with partially known chemical compositions, four partition fractions, six compounds and a mixture of four interconverting flavanones previously isolated from Lippia salviaefolia and Lippia lupulina were assayed in vitro towards epimastigote forms of Trypanosoma cruzi and promastigote forms of Leishmania amazonensis. The root extract of L. lupulina had... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Leishmanicidal; Trypanocidal; Triterpenoids; Flavonoids; T. cruzi. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672016000400411 |
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| Gomaa,Nasr Hassan; Hassan,Mahmoud Omar; Fahmy,Gamal Mohammad; González,Luís; Hammouda,Ola; Atteya,Atteya Mostafa. |
| Annual sowthistle (Sonchus oleraceus) has been reported to produce allelopathic effects. Two greenhouse experiments were conducted to estimate the allelopathic potential of both plant residue and root exudates of S. oleraceus on flavonoid composition and nodulation in a leguminous crop, Trifolium alexandrinum, and in two leguminous weeds, Melilotus indicus and T. resupinatum. The results of high performance liquid chromatography-mass spectrometry (HPLC-MS/MS) showed that all three legumes contained six flavonoid aglycones: apigenin, daidzein, kaempferol, luteolin, myricetin and quercetin; and seven flavonoid glycosides: daidzin, genistin, hesperidin, hyperoside, kaempferol-7-O-glucoside, naringin and rutin. In general, both plant residue and root exudates... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Allelopathy; Flavonoids; Legumes; Nodulation; Sonchus oleraceus. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400553 |
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| Klein,Fátima Rosane S.; Reis,Andressa; Kleinowski,Alítcia M.; Telles,Renata T.; Amarante,Luciano do; Peters,José A.; Braga,Eugenia Jacira B.. |
| ABSTRACT Ultraviolet B radiation has been described as a potential elicitor agent of the synthesis of secondary metabolites in plants. Thus, the present study aimed to investigate the production of betalains and total flavonoids, as well as the antioxidant activity, of Alternanthera sessilis, A. brasiliana, A. tenella and A. philoxeroides exposed to different periods of UV-B radiation (280-315 nm). Plants of these four species were exposed to UV-B radiation for 0, 2, 4, 6, and 8 hours, which amounts to 0, 10, 20, 30, and 40 J cm−2 of radiation, respectively. Significant increases in betacyanin and betaxanthin levels were observed in A. sessilis and A. brasiliana during the period of UV-B exposure, while no differences were observed for the others species.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Abiotic elicitor; Antioxidants; Flavonoids; Medicinal plants; Pigments; Ultraviolet radiation. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000400615 |
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| Aguiar, Sílvia Cristina de; Universidade Estadual de Maringá; Zeoula, Lúcia Maria; Universidade Estadual de Maringá; Moura, Lucimar Pontara Peres de; Universidade Estadual de Maringá; Prado, Ivanor Nunes do; Universidade Estadual de Maringá; Paula, Eduardo Marostegan de; Universidade Estadual de Maringá; Samensari, Rafael Barreiros; Universidade Estadual de Maringá. |
| The objective was to evaluate the effect of propolis-based products (PBP) on performance, digestibility, microbial production and carcass characteristics of feedlot young bulls. Twenty-seven crossbred young bulls were used, with 353 ± 28 kg of body weight in a completely randomized experimental design, divided in three treatments: two diets with PBP with different dosages (PBP1= 0.018 mg g-1 and PBP2= 0.036 mg g-1 of total flavonoids in chrysin) and control diet (CON). To determine total digestibility, the indigestible dry matter was used as an internal marker, while microbial production was estimated from purine derivatives in urine, collected by the spot method. The evaluated carcass characteristics were: hot carcass weight, dressing percentage,... |
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Palavras-chave: 5.04.00.00-2 additive; Flavonoids; Meat quality; Microbial efficiency; Ruminant additive; Flavonoids; Meat quality; Microbial efficiency; Ruminant.. |
| Ano: 2012 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/15167 |
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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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| 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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| 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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| García-Mateos,Rosario; Aguilar-Santelises,Leonor; Soto-Hernández,Marcos; Nieto-Angel,Raúl; Kite,Geoffrey. |
| There are a number of medicinally active phytochemicals isolated from hawthorn with most of the data generated in studies of those species that are native to Europe and Asia. Comparatively little is known about the North American, specifically the Mexican Crataegus species. The objective of this study was to evaluate phenolic compounds, flavonoids and antioxidant activity of extracts of flowers from six Mexican accessions of Crataegus in order to contribute to the chemistry of the Germplasm Bank accessions at the Universidad Autonóma Chapingo. Antioxidant activity was evaluated using DPPH (2,2-diphenyl-1-picrylhydrazyl) method and the flavonoids were identified by HPLC-MS. Quercetin- 3-O-glucoside, quercetin-3-O-rhamnoside, quercetin... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Crataegus; Flavonoids; Flowers; Mexican hawthorn; Radical scavenging activity. |
| Ano: 2012 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952012000700002 |
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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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| SILVA,EWERTON A.S. DA; LÔBO,LÍVIA T.; SILVA,GEILSON A. DA; SOUZA FILHO,ANTONIO PEDRO DA S.; SILVA,MILTON N. DA; ARRUDA,ALBERTO C.; GUILHON,GISELLE M.S.P.; SANTOS,LOURIVALDO S.; ARRUDA,MARA S.P.. |
| In some previous studies, we described the isolation of nine compounds from leaves of Derris urucu, a species found widely in the Amazon rainforest, identified as five stilbenes and four dihydroflavonols. In this work, three of these dihydroflavonols [urucuol A (1), urucuol B (2) and isotirumalin (3)] were evaluated to identify their potential as allelochemicals, and we are also reporting the isolation and structural determination of a new flavonoid [5,3′-dihydroxy-4′-methoxy-(7,6:5″,6″)-2″,2″-dimethylpyranoflavanone (4)]. We investigated the effects of the dihydroflavonols 1-3 on seed germination and radicle and hypocotyl growth of the weed Mimosa pudica, using solutions at 150 mg.L–1. Urucuol B, alone, was the substance with the greatest potential to... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Derris urucu; Flavonoids; Allelopathy; Development of weeds; Seed germination. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652013000300881 |
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| LIMA-DELLAMORA,ELISANGELA C.; WALDHELM,KASSIA C.V.; ALVES,ADRIANA M.; LAGE,CLAUDIA A.S.; LEITÃO,ALVARO A.C.; KUSTER,RICARDO M.. |
| Extracts of Echinodorus grandiflorus obtained from dried leaves by three different techniques were evaluated by bacterial lysogenic induction assay (Inductest) in relation to their genotoxic properties. Before being added to test cultures, extracts were sterilized either by steam sterilization or ultraviolet light. Only the extracts prepared by infusion and steam sterilized have shown genotoxic activity. The phytochemical analysis revealed the presence of the flavonoids isovitexin, isoorientin, swertisin and swertiajaponin, isolated from a genotoxic fraction. They were assayed separately and tested negative in the Inductest protocol. The development of browning color and sweet smell in extracts submitted to heat, prompted further chemical analysis in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Echinodorus grandiflorus; Genotoxicity; Maillard's Reaction; Flavonoids. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000301385 |
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| Magalhães,Aderbal F.; Tozzi,Ana Maria G.A.; Magalhães,Eva G.; Sannomiya,Miriam; Soriano,Maria del Pilar C.; Perez,Mary A.F.. |
| The analysis of root extracts from Lonchocarpus montanus A.M.G. Azevedo resulted in the isolation of twenty three compounds chiefly flavonoids of which five (four flavonoids and one benzophenone) are described for the first time. The molecular structures of the new compounds (1-5) were determined through spectral analysis (UV, IR, MS and NMR) as being: 2'-hydroxy-8-(<FONT FACE=Symbol>a,a</FONT>-dimethylallyl)-2", 2"-dimethylpyrano-(5",6":3',4')-dibenzoylmethane (1), 2'-methoxy-8-(<FONT FACE=Symbol>a, a</FONT>-dimethylallyl)-2", 2"-dimethylpyrano-(5",6":3',4')-dibenzoylmethane (2), 4'-methoxy-2",2"-dimethylpyrano-(5",6":8,7)-flavone (3), 2"-(1-hydroxy-1-methylethyl)-furano-(4",5":8,7)-flavone (4) and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lonchocarpus montanus A.M.G. Azevedo; Leguminosae; Dibenzoylmethanes; Flavonoids; Flavones; Benzophenone; Bioautography; Artemia salina lethality. |
| Ano: 2007 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652007000300001 |
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| Cruz,Bruna P.; Chedier,Luciana M.; Fabri,Rodrigo L.; Pimenta,Daniel S.. |
| This study compares the development of Kalanchoe brasiliensis and Kalanchoe pinnata, which are medicinal species known as "saião" and "folha da fortuna" that are used interchangeably by the population for medicinal purposes. The experiment consisted of 20 plots/species planted in plastic bags with homogeneous substrate in a randomized design, which grown under light levels (25%, 50%, 70%, full sunlight) at environment temperature, and a treatment under a plastic with greater temperature range than the external environment. It was obtained for K. pinnata a greater plant height, total length of sprouts, stems, production and dry matter content of leaves than that obtained for K. brasiliensis, which achieved higher averages only for the length of lateral... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Kalanchoe; Luminosity; Mucilage; Flavonoids. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000400030 |
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| GONZÁLEZ-MENDOZA,DANIEL; TRONCOSO-ROJAS,ROSALBA; GONZALEZ-SOTO,TANIA; GRIMALDO-JUAREZ,ONECIMO; CECEÑA-DURAN,CARLOS; DURAN-HERNANDEZ,DAGOBERTO; GUTIERREZ-MICELI,FEDERICO. |
| ABSTRACT The aim of the present work is to evaluate the changes on the phenylalanine ammonia lyase (PAL) activity, phenolic compounds accumulation and photochemical efficiency in leaves of P. glandulosa treated with Cd2+ (0.001 M) and Cu2+ (0.52 M) concentrations for 96 h under hydroponic conditions. The results showed that only leaves treated with copper had a decrease in photochemical efficiency and leaf epidermal polyphenols in P. glandulosa leaves after 96 h of exposure. On the other hand the reverse-phase HPLC analysis revealed higher levels of phenolic compound (gallic, vanillic and caffeic acids) and flavonoids (rutin and kaempferol-3-O-glucosides) in plant leaves from Cu and Cd-treatments with respect to control plants. Finally, highest increments... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Heavy metals; Prosopis glandulosa; Flavonoids; Chlorophyll a fluorescence. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401465 |
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| Magalhães,Aderbal F.; Tozzi,Ana M.G.A.; Magalhães,Eva G.; Blanco,Ivani S.; Soriano,Maria-Del-Pilar C.. |
| The light petroleum extract from the roots of Lonchocarpus muehlbergianus Hassl contained nine flavonoids, including six new ones. These are 2,4-cis-2,4,5,8-tetramethoxy-(2´´,3´´:6,7)-furanoflavan; 2,4-cis-4-hydroxy-2,5,8-trimethoxy-(2´´,3´´:6,7)-furanoflavan; 2,4-cis-2-prenyloxy-4,5,8-trimethoxy-(2´´,3´´:6,7)-fu-ranoflavan; 2,4-cis-2-prenyloxy-4-hydroxy-5,8-dimethoxy-(2´´,3´´:6,7)-furanoflavan; 2',5',6'-trimethoxy-9-(1,1-dimethylallyoxy)-[2´´,3´´:3´,4´]-furanochalcone; 5,6-dimethoxy-(2´´,3´´:7,8)-furanoflavone, identi-fied by analysis of their spectral data (UV, IR, ¹H and 13C NMR, 2D-NMR, NOE and MS). The natural occurrence of 2,4-dioxygenated flavan derivatives is being reported for the first time. Quantitative analysis of the petrol extract, by using... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lonchocarpus muehlbergianus; Leguminosae; Flavonoids; Flavans. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652004000400004 |
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| J. SIMÃO,MARIELA; J.S. BARBOZA,THIAGO; G. VIANNA,MARCELA; GARCIA,RENATA; MANSUR,ELISABETH; P.R. IGNACIO,ANA CLAUDIA; PACHECO,GEORGIA. |
| Abstract Passiflora species are well known for their common use in popular medicine for the treatment of several diseases, such as insomnia, anxiety, and hysteria, in addition to their anti-inflammatory, antioxidant, analgesic and antibacterial potential. However, few data about the chemical composition and the medicinal potential of in vitro derived materials are available. Therefore, the goal of this work was to compare, for the first time, the phytoconstituents of in vitro derived materials of four Passiflora species, and evaluate the antibacterial potential of their extracts against 20 Gram-positive and negative strains. Chromatographic analysis indicated the presence of saponins in roots extracts from all studied species, whereas leaf extracts... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibacterial; Chromatography; Flavonoids; Passiflora; Saponins. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000602805 |
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| DEL-VECHIO-VIEIRA,GLAUCIEMAR; SANTOS,BRUNA C.S.; ALVES,MARIA SILVANA; ARAÚJO,AÍLSON L.A.; YAMAMOTO,CÉLIA H.; PINTO,MÍRIAM A.O.; KAPLAN,MARIA AUXILIADORA C.; SOUSA,ORLANDO V.. |
| ABSTRACT The present study was designed to investigate the antioxidant, antinociceptive and anti-inflammatory activities of the ethanol extract from Ageratum fastigiatum branches. Phytochemical screening and total phenol and flavonoid contents were determined. The antioxidant activity was assessed by 2,2-diphenyl-1-pycrilhydrazin (DPPH) and iron reducing power methods. The antinociceptive effect was evaluated using the acetic acid-induced writhing, formalin, hot plate and tail immersion assays; while the carrageenan-induced paw edema and pleurisy tests were performed to examine the anti-inflammatory activity against acute inflammation. The extract revealed the presence of flavonoids, tannins, coumarins, terpenes, sterols and saponins. Expressive levels of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ageratum fastigiatum; Analgesic; Anti-inflammatory; Antioxidant; Flavonoids; Total phenols. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000401471 |
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| Registros recuperados: 103 | |
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