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| Registros recuperados: 91 | |
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| Palma Tenango, Mariana. |
| Caléndula (Calendula officinalis L.) es una planta herbácea anual que destaca por los usos medicinales de sus capítulos (flores). En esta especie se ha demostrado diversidad genética y de composición química entre variedades. En México no se cultivan diferentes variedades ni se ha investigado la variación posible en el rendimiento de capítulos, concentración de flavonoides y carotenoides en función de la variedad y de cortes, como es el efecto causado por cosechas continuas de los capítulos florales. El objetivo de este estudio fue determinar el rendimiento, concentración de flavonoides y carotenoides en seis variedades de caléndula aquí seleccionadas, cuyos capítulos fueron cosechados a lo largo de siete cortes en 2010 y de nueve cortes en 2011, de... |
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Palavras-chave: Caléndula; Flavonoides; Carotenoides; Descripción varietal; Pot marigold; Flavonoids; Carotenoids; Description varietal; Fisiología vegetal; Doctorado. |
| Ano: 2014 |
URL: http://hdl.handle.net/10521/2274 |
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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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| Alvarenga,Ivan Caldeira Almeida; Valadares,Rafael Vasconcelos; Martins,Ernane Ronie; Oliveira,Flávio Gonçalves; Figueiredo,Lourdes Silva de; Kobayashi,Mauro Koji. |
| The objective of this work was to assess the effect of different periods of water stress before harvest of pepper-rosmarin (Lippia sidoides) on the contents of essential oil and flavonoids. The experiment was carried out during 270 days of cultivation, with drainage lysimeters, in a completely randomized block design with five treatments: 0, 2, 4, 6, and 8 days of water suppression before harvest, with four replicates. Fresh and dry matter yield, essential oil content, total flavonoids content, and water potential and temperature of leaves were determined. There was a decrease of approximately 50% in oil content and of 60% in total flavonoid content with the reduction of leaf water potential in 0.3 MPa. Essential oil is more sensitive to water stress than... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lippia sidoides; Essential oil; Flavonoids; Leaf water potential; Medicinal plant; Water stress. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2011000700005 |
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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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| Corrêa,Carline Barroso; Veras,Galileu Crovatto; Silva,Giselle Paula Silva da; Brabo,Marcos Ferreira; Silva,Evaldo Martins. |
| Abstract: The objective of this work was to evaluate the performance, body composition, and physiological state of tambaqui (Colossoma macropomum) fingerlings fed diets containing different levels of green tea (Camellia sinensis) extract (GTE). A completely randomized design was used with five treatments, different levels of GTE (0.00, 0.05, 0.30, 0.55, and 0.80 g kg-1) and three replicates. The diets were offered to fingerlings twice a day, for 90 days. The increase of dietary GTE levels promoted a positive quadratic effect on body lipids, hepatic lipids, retention of body lipids, glucose, and total triglycerides, and the minimum values of these variables were estimated with 0.61, 0.54, 0.73, 0.60, and 0.30g kg-1 GTE in the diet, respectively. There was a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Camellia sinensis; Colossoma macropomum; Flavonoids; Lipid reduction; Phytotherapy; Plant extracts. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000500540 |
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| Peña,JEM; Vieira,SL; López,J; Reis,RN; Barros,R; Furtado,FVF; Silva,PX. |
| The aim of this study was to evaluate the effects of increasing doses of ascorbic acid (AA) and citric flavonoids (quercetin and rutin) on the performance and meat quality characteristics of broilers submitted to cyclic heat stress. Four-hundred one-day-old female Ross 308 were housed in 40 battery cages a in temperature controlled room. Treatments consisted of 0, 250, 500, and 1000 g/ton on of AA + citric flavonoids. Birds were fed ad libitum until 32 day of age. Beginning on day 14 post-hatch until the end of the experiment, in order to simulate cyclic heat stress, the temperature inside the room was increased to 32°C for 5 hours, and decreased until reaching the comfort temperature corresponding to the age of the animals. Birds were slaughtered at 33... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ascorbic acid; Broiler; Heat stress; Flavonoids. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2008000200008 |
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| Türkoğlu,E.A; Kuzu,M; Ayasan,T; Inci,H; Eratak,SV. |
| ABSTRACT Thioredoxin reductases (TrxRs) are selenocysteine-containing flavoenzymes that reduce Trxin NADPH-dependent manner. In the view of the direct vital role of TrxR in a wide range of biochemical and physiological processes, methods to inhibit this enzyme are clinically important. TrxR has recently emerged as a new candidate in anticancer drug investigations because of overexpression in tumorous cells. In this study, TrxR from chick liver was purified 94.6-fold with a yield of 4.86% and a specific activity of 0.19 EU/mg. KM and Vmax values of TrxR for DTNB were calculated as 0.9 mM and 0,03 EU/mL, respectively. Then, the effects of the flavonoids hesperidin, naringenin, chlorogenic acid, ferulic acid, naringin, 3,4-dihydoxybenzoic acid, and ellagic... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flavonoids; Inhibitors; Natural products; Thioredoxin reductase. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000200345 |
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| CELANT,VIVIANE MARCELA; BRAGA,GILBERTO COSTA; VORPAGEL,JESSICA ARIANE; SALIBE,ARIANE BUSCH. |
| ABSTRACT The objective of this work was to evaluate the content of phenolic compounds, anthocyanins and flavonoids extracted with 80% ethanol and water, and antioxidant capacity (DPPH and ABTS) of five blackberry cultivars produced in Western Paraná, Brazil. Brazos, Tupy, Arapaho, Choctaw and Guarani blackberries were studied. Soluble solids, titratable acidity and ascorbic acid of fruits were also characterized. Total phenolic compounds ranged from 8.23 to 14.98 mg GAE g-1 (f.w.) and Arapaho cultivar exhibited the highest contents in both solvents. Anthocyanins ranged from 2.57 to 9.42 mg ECy3glu g-1 (f.w.), being the solvent ethanol 80% more efficient than the water, and Choctaw cultivar showing the highest content. Flavonoids ranged from 0.46 to 1.14... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rubus spp.; Total phenolic; Flavonoids; Anthocyanins. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452016000200202 |
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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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| Ítavo,Camila Celeste Brandão Ferreira; Graça Morais,Maria da; Ramos,Cristhian Liber; Ítavo,Luís Carlos Vinhas; Tomich,Thierry Ribeiro; Silva,Jonilson Araújo da. |
| The objective of this paper is to assess the effects of the inclusion of different levels of green propolis extract in the diet of lambs in feedlot on ingestive behavior, nutrients digestibility, physiological parameters and performance. Eight lambs were distributed in double Latin Square with four treatments, corresponding to the inclusion levels (4, 8, 12, 16 mL) of green propolis ethanolic extract (30 g of ground crude propolis was infused in a 100-mL hydroalcoholic solution, 700 mL/L). The diets were composed of Brachiaria brizantha cv. MG5 hay and a commercial concentrate (roughage:concentrate ratio was 50:50) in a dry matter basis. No effect was observed on dry matter (31.2 g/kg of BW), crude protein, ether extract, neutral detergent fiber,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Additive; Apis mellifera; Flavonoids; Ionophore. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000900021 |
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| Silva,Jonilson Araújo da; Ítavo,Camila Celeste Brandão Ferreira; Ítavo,Luís Carlos Vinhas; Morais,Maria da Graça; Franco,Gumercindo Loriano; Zeoula,Lucia Maria; Heimbach,Natália da Silva. |
| The present study tested brown propolis in crude or extract form as a feed supplement for feedlot lambs to identify the type that most improves in vivo nutrient digestibility. Digestibility was assessed by both total fecal collection and internal markers and the results obtained by these techniques were compared. The completely randomized design was used to compare feed intake and nutrient digestibility of 24 male lambs aged seven months among four dietary treatments (crude brown propolis, propolis ethanol extract, monensin sodium, and control). Methods of feces collection were compared using a completely randomized split-plot design, with experimental diets corresponding to the main factor and the methods to estimate fecal production as the sub-factor.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Flavonoids; Monensin; Ruminants. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000700376 |
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| Registros recuperados: 91 | |
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