Home Itens selecionados Provedores de dados OAI Créditos Sobre Ajuda

			Busca avançada
	Provedor de dados Infoteca-e (2) Autor BARBIERI, F. da S. (2) BARROS-BATTESTI, D. M. (2) BRITO, L. G. (2) FAMADAS, K. M. (2) LABRUNA, M. B. (2) CAMARGO, L. M. A. (1) FACCINI, J. L. (1) FACCINI, J. L. H. (1) Mais... Palavra-chave Carrapato. (2) Larvas (2) Amblyomma. (1) Metodologia. (1) Porotaxia (1) Região Neotropical. (1) Mais... Tipo do documento Boletim de Pesquisa e Desenvolvimento (INFOTECA-E) (1) Comunicado Técnico (INFOTECA-E) (1) Ano 2007 (1) 2006 (1) País Brazil (2) Idioma Português (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 98 Primeira ... 1 2 3 4 5 ... Última In vitro evaluation of Mucuna pruriens (L.) DC. antioxidant activity BJPS Longhi,Joy Ganem; Perez,Elisa; Lima,Jair José de; Cândido,Lys Mary Bileski. Mucuna pruriens (L). Dc is a plant of the Fabaceae family, commonly known as velvet bean, itchy bean, chiporro bean, mucuna, among others. This plant has several medicinal properties, including its potential to treat Parkinson's disease (PD). International studies have shown that this plant surpasses the benefits of the substance levodopa in the treatment of PD. Taking into account that nerve cells are highly sensitive to oxidative substances, this study evaluated the antioxidant activity of mucuna and compared it to that of levodopa. The plant seeds' phenolic concentration was quantified by using the Folin-Denis reagent and the antioxidant activity assays were performed by using three different methods: the reduction of the phosphomolybdenium complex, the... Tipo: Info:eu-repo/semantics/article Palavras-chave: Mucuna pruriens; Antioxidant; Phenolic compounds. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502011000300011 Determination of phenolic and triterpenic compounds in Jatropha gossypiifolia L by Ultra-high performance liquid chromatography-tandem mass spectrometric (UHPLC-MS/MS) BJPS Silveira,Rudinei da Silva; Leal,Gabriela Camera; Molin,Thais Ramos Dal; Faccin,Henrique; Gobo,Luciana Assis; Silveira,Géssica Domingos da; Souza,Mariana Tatsch da Silva; Lameira,Osmar Alves; Carvalho,Leandro Machado de; Viana,Carine. This work describes the chemical characterization of extracts of Jatropha gossypiifolia (from Amazonia region) concerning the presence of phenolic and triterpenic compounds using Ultra High Perfomance Liquid chromatography coupled to Mass Spectrometry in Tandem (UHPLC-MS/MS) methods. The studied compounds belong to the most frequently found classes in medicinal plants (triterpenes, flavonoids, flavones, hydroxycinnamic acids, coumarins, catechins and stilbenes), which have been analyzed as chemical and bioactive markers in hydroethanolic and aqueous extracts. Several polyphenolic compounds identified herein are unprecedented in the scientific literature for this species. The chemical markers identified and quantified in the studied extracts of J.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Jatropha gossypiifolia L; UHPLC-MS/MS; Phenolic compounds; Triterpenic compounds. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100539 Morpho-anatomical characters of the leaf and stem of Mandevilla coccinea (Hook. et Arn.) Woodson, Apocynaceae BJPS Duarte,Márcia do Rocio; Larrosa,Carina Rau Rivas. Mandevilla coccinea (Hook. et Arn.) Woodson, Apocynaceae is a herb native to South America employed in folk medicine as an analgesic, anti-inflammatory and to inhibit snake venom effects. This work was carried out to study the morpho-anatomical characters of the leaf and stem in order to advance knowledge on this medicinal plant and on pharmacognostic quality control. The plant material was fixed and prepared according to light and scanning electron microtechniques. Its leaves are simple, alternate and ovate-obovate. The epidermis is uniseriate and coated with a thick and striate cuticle. The stomata are paracytic and occur on both foliar surfaces. The dorsiventral-like mesophyll has a sub-epidermal parenchymatic layer containing phenolic substances and is... Tipo: Info:eu-repo/semantics/article Palavras-chave: Mandevilla coccinea (Hook. et Arn.) Woodson/pharmacognosy; Mandevilla coccinea (Hook. et Arn.) Woodson/morpho-anatomical characters; Apocynaceae/pharmacognosy; Medicinal plants/pharmacognostic quality control; Phenolic compounds. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502011000100017 Enzymes modulation by dried grape pomace from the manufacture of wines and juices BJPS Freire,Juliana Mesquita; Barroso,Amanda Ribeiro; Assis,Amanda Araújo de; Texeira,Bruna Helena; Braga,Jonatas Henrique Guimarães; Oliveira,Daniela Aparecida; Braga,Mariana Aparecida; Marcussi,Silvana. The processing of grapes for the manufacture of juices and wines, generates large quantities of by-products rich in metabolites with antioxidant, antimicrobial, anti-inflammatory and cicatrizing activities. The high homology between human enzymes and snake venoms makes the latter valuable laboratory tools for the study of pathophysiological processes. Proteases and phospholipases A2 act in processes related to hemostasis and inflammatory response. Thus, in this work, dried pomace obtained from grape (Isabel, Niagara, Bordô, BRS Violeta and Blend cultivars) processing were evaluated on phospholipase, proteolytic, hemolytic and thrombolytic activities induced by snakes venoms and the content of phenolic compounds and minerals was evaluated. The dried pomace... Tipo: Info:eu-repo/semantics/article Palavras-chave: Grape extracts; Industrial wastes; Phenolic compounds; Protease modulators; Phospholipase A2 modulators. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100609 Inhibition of DNA virus: Herpes-1 (HSV-1) in cellular culture replication, through an antioxidant treatment extracted from rosemary spice BJPS Mancini,Dalva Assunção Portari; Torres,Rosângela Pavan; Pinto,José Ricardo; Mancini-Filho,Jorge. This work aimed to evaluate antiviral properties in antioxidants from spices. Phenolic compounds extracted from rosemary (Rosmarinus officinallis, L) by hot water, had their antioxidant activity determined by spectrophotometry using β carotene/linoleic acid system. The rosemary extract was evaluated by antiviral assay of Herpes Virus type-1 (HSV-1) replication in VERO cells, in the presence or absence of the spice. 10,000 TCID50/mL of the HSV-1 was kept for 3 h at 4º C, with 300 ppm of rosemary extract, and 100 ppm of butyl hydroxyl toluene (BHT). Then, these viruses were inoculated in VERO cells incubated at 37º C in CO2-5 %, for seven days. Daily, they were examined and the end point was based on 100% of CPE in virus control (without antioxidants). The... Tipo: Info:eu-repo/semantics/article Palavras-chave: Natural antioxidants; Virus replication; Phenolic compounds; Herpesvirus; Rosemary. Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502009000100016 Characterization and optimization of oil microcapsules from Attalea phalerata Mart. for the preservation of bioactive compounds BJPS 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 Influence of contrasting environments on seed composition of two quinoa genotypes: nutritional and functional properties Chilean J. Agric. Res. Miranda,Margarita; Vega-Gálvez,Antonio; Martínez,Enrique A; López,Jéssica; Marín,Rosa; Aranda,Mario; Fuentes,Francisco. Quinoa (Chenopodium quinoa Willd.) in Chile represents a source of germplasm with high nutritional value. However, there is little information available related to quinoa seed quality grown under contrasting environments. In this study we evaluated the changes on seed composition of seeds of two lowland/coastal quinoa genotypes grown under arid (Vicuna) and cold-temperate (Temuco) conditions in Chile. Results showed that in the case of 'Regalona Baer' and 'Villarrica' genotypes the arid location (with irrigation) led to a significant increase (P < 0.05) in grain yield (4.2 and 5.1 t ha-1, respectively), soluble dietary fiber (16.8 ± 0.4 and 28.9 ± 2.1 g kg-1 DM, respectively), vitamin B3 (2.44 ± 0.005 and 2.26 ± 0.04 mg 100 g-1 DM, respectively),... Tipo: Journal article Palavras-chave: Chenopodium quinoa; Climate stress; Antioxidant activity; Phenolic compounds; Protein; Mineral content. Ano: 2013 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392013000200004 Improving meat quality through natural antioxidants Chilean J. Agric. Res. Velasco,Valeria; Williams,Pamela. Nowadays, consumers are demanding more natural foods, obliging the industry to include natural antioxidants in foods. Natural antioxidants have been used instead of synthetic antioxidants to retard lipid oxidation in foods to improve their quality and nutritional value. This review discusses some aspects of recent research on antioxidant activity of plant extracts and natural compounds to improve meat quality. Many herbs, spices, and their extracts have been reported as having high antioxidant capacity, such as some plants of the Lamiaceae family, e.g., oregano (Origanum vulgare L.), rosemary (Rosmarinus officinalis L.), and sage (Salvia officinalis L.). The antioxidant activity of these plants is attributed to their phenolic compound content, which... Tipo: Journal article Palavras-chave: Antioxidant activity; Essential oils; Phenolic compounds; Meat quality. Ano: 2011 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392011000200017 Physical and Chemical Characterization of Melia azedarach L. Fruit and Leaf for Use as Botanical Insecticide Chilean J. Agric. Res. Chiffelle G,Italo; Huerta F,Amanda; Lizana R,Diego. A study was undertaken of the physical and chemical characteristics and insecticide properties of melia (Melia azedarach L.) (Meliaceae) fruit and leaves; melia has been introduced in Chile for ornamental purposes. The physical and chemical properties were evaluated in two stages of fruit and leaf maturity, i.e., green /mature, and mature/juvenile, respectively. Laboratory bioassays were carried out on Drosophila melanogaster Meigen (Diptera: Drosophilidae) as an insect model. The diameter of M. azedarach fruit was in the lower limit in relation to other studies. The flour obtained from green fruit had an average dry weight inferior to that of mature fruit. The average dry leaf weights were similar in both juvenile and mature states. The green fruits had... Tipo: Journal article Palavras-chave: Chinaberry tree; Meliaceae; Phenolic compounds. Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-58392009000100005 Photosynthetic and antioxidant performance are differentially affected by short-term nitrogen supply in highbush blueberry cultivars Ciencia e Investigación Agraria Yañez-Mansilla,Erwin; Cartes,Paula; Reyes-Díaz,Marjorie; Ribera-Fonseca,Alejandra; Alberdi,Miren. Nitrogen (N) is an essential nutrient for photosynthesis and may influence phenolic compound synthesis in higher plants. The effect of different amounts of N (0 to 38 mM) provided on a short-term (4 d) basis on the photosynthetic and antioxidant performance of highbush blueberry cultivars (Legacy and Bluegold) grown in a nutrient solution was studied. In both cultivars, the N concentration of leaves slightly increased in response to the N supply, with Bluegold frequently showing higher N concentrations than Legacy. Photosynthesis was reduced in Bluegold at the highest N dose, whereas in Legacy, a decrease of CO2 assimilation occurred under N starvation. This decrease in photosynthesis was accompanied by enhanced lipid peroxidation but only in Bluegold. In... Tipo: Journal article Palavras-chave: Nitrogen; Oxidative damage; Phenolic compounds; Superoxide dismutase; Vaccinium corymbosum. Ano: 2014 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202014000100006 Agro-industrial wastes as sources of bioactive compounds for food and fermentation industries Ciência Rural Shirahigue,Ligianne Din; Ceccato-Antonini,Sandra Regina. ABSTRACT: Agro-industrial wastes are of great interest because they are important natural sources of bioactive compounds and can generate value-added byproducts. Recent studies have shown that byproducts generated by the food processing industry are rich in bioactive compounds, such as phenolic compounds, organic acids, and carotenoids, among others. The growing interest in replacing synthetic antioxidant and antimicrobial compounds with natural ones has stimulated a search for these bioactive compounds from plant sources, especially from fruit-processing wastes. The study aims to project the agro-industrial wastes as potential natural sources of antioxidants and antimicrobials and the feasible technological applications in food and fermentation... Tipo: Info:eu-repo/semantics/article Palavras-chave: Phenolic compounds; Antioxidant activity; Antimicrobial activity; Agro-industrial waste. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000400754 Antioxidant properties, quantification and stability of betalains from pitaya (Hylocereus undatus) peel Ciência Rural Mello,Fernanda Robert de; Bernardo,Claudia; Dias,Caroline Odebrecht; Gonzaga,Luciano; Amante,Edna Regina; Fett,Roseane; Candido,Lys Mary Bileski. Pitaya peel can be used as a raw material for betalains extraction. The aim of this research was to quantify phenolic compounds, antioxidant activity and betalains on pitaya peel. Furthermore, evaluate the betalains stability against various pH conditions and exposure time of heating. The results showed that pitaya peel contains phenolic compounds and presented antioxidant activity. Moreover it showed high concentration of betalains (101.04mg equivalent to betanin. 100g-1) which were stable over a wide pH range (3.2 - 7.0) and were resistant to heating (100oC) up to 10 minutes at pH range from 3.7 to 5.5. Therefore, pitaya peel is a promising source of betalains which can be applied as a natural colorant for food. Tipo: Info:eu-repo/semantics/article Palavras-chave: Betalains; Antioxidant activity; Colorant; Phenolic compounds. Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000200323 Long-term maintenance of in vitro cultures affects growth and secondary metabolism of St. John's Wort Ciência Rural Figueiró,Adriana de Andrade; Correa,Cynthia Manira; Astarita,Leandro Vieira; Santarém,Eliane Romanato. Hypericum perforatum is a traditional medicinal plant with wound healing and antidepressant properties. Efficiency of micropropagation is often related to the long term maintenance of tissues in culture, which may alter the secondary metabolism of plants. The objective of this study was to evaluate growth and secondary metabolism of in vitro shoots of H. perforatum on short and long term maintenance of cultures (30 and 100 days). The effect of BA and NAA supplementation was evaluated during 30 days of culture. Adventitious shoots were cultivated on MS medium supplemented with 4.4mM BA alone or in combination with 0.05mM NAA for 30 days. A hormone-free medium was used as control. Shoots cultivated for 100 days were maintained in presence of 4.4mM BA.... Tipo: Info:eu-repo/semantics/article Palavras-chave: Tissue culture; Hypericum perforatum; Hypericin; Phenolic compounds. Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010001000010 Salicylic acid on antioxidant activity and betacyan in production from leaves of Alternanthera tenella Ciência Rural Rodrigues-Brandão,Isabel; Kleinowski,Alítcia Moraes; Einhardt,Andersom Millech; Lima,Milene Conceição; Amarante,Luciano do; Peters,José Antonio; Braga,Eugenia Jacira Bolacel. This research investigates effects of salicylic acid (an abiotic elicitor) on the antioxidant activity and betacyan production from leaves of Alternanthera tenella cultured in vitro was evaluated. Plants were grown in a liquid MS medium and vermiculite substrate. After 35 days salicylic acid was added to the medium. Content of betacyanins, total phenols and flavonoids and non-enzymatic antioxidant capacity were determined in leaves of A. tenella after 0, 12, 36 and 48h of treatment. After 36h, concentration of betacyanins and total phenols increased. On the other hand, the increase of the treatment time caused a slight decrease in total flavonoids and reduced the DPPH free radical activity. As result the antioxidant activity of the leaves of A. tenella is... Tipo: Info:eu-repo/semantics/article Palavras-chave: Alternanthera tenella; DPPH; Total flavonoids; Phenolic compounds; Betacyanins.. Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014001001893 Phytochemical screening and antimicrobial activity testing of crude hydroalcoholic extract from leaves of Sphagneticola trilobata (Asteraceae) Ciência Rural Leite,Ana Greice Borba; Farias,Eulina Tereza Nery; Oliveira,Ana Paula de; Abreu,Ruan Emmanuell Franco de; Costa,Mateus Matiuzzi da; Almeida,Jackson Roberto Guedes da Silva; Estevão,Lígia Reis de Moura; Evêncio-Neto,Joaquim. ABSTRACT: This study aimed to perform phytochemical analysis and to test the antimicrobial activity of the crude hydroalcoholic extract obtained from the leaves of Sphagneticola trilobata. Classes of secondary metabolites present in the extract were identified through phytochemical screening using analytical thin-layer chromatography. Antimicrobial activity was evaluated by testing cultures of Staphylococcus aureus, S. epidermidis, Staphylococcus spp., Escherichia coli, Serratia marcescens, Enterococcus faecalis, Pseudomonas aeruginosa, Salmonella Typhimurium, and Klebsiella pneumoniae isolated from human skin and those of Staphylococcus spp. isolated from dog skin using the broth microdilution method. In the phytochemical screening, classes of... Tipo: Info:eu-repo/semantics/article Palavras-chave: Antimicrobial; Phytochemical Screening; Phenolic compounds. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400452 Relationship between chemical components, bacterial adherence and in vitro fermentation of tropical forage legumes Ciência e Agrotecnologia Fluck,Ana Carolina; Kozloski,Gilberto Vilmar; Martins,Andressa Ana; Mezzomo,Mariana Patricia; Zanferari,Filipe; Stefanello,Simone. Inclusion of forage legumes in diet may improve tropical ruminant systems productivity and sustainability. However, it is not well stablished which chemical components more impact their nutritional value. The relationship between chemical composition and in vitro fermentation of tropical forage legume was evaluated with the objective of obtaining indicators of their nutritional value. Samples of Crotalaria spectabilis, Cajanus cajan, Macrotyloma axillare, Mucuna aterrina, Stylosantis sp. and Canavalia ensiformis, cut from plants at growth age between 47 to 110 days, were analysed. Total gas production showed negative correlation (P<0.05) with total N (R=-0.51), acid detergent fibre (ADF, R=-0.62) and acid detergent lignin (ADL, R=-0.65), and positive... Tipo: Info:eu-repo/semantics/article Palavras-chave: Gas production; Lignin; Nutritional value; Phenolic compounds; Tannins. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000500010 Evaluation of omega-3 fatty acids content and antioxidant activity in wheat (Triticum aestivum L.) leaves Ciência e Agrotecnologia Aguiar,Ana Carolina de; Boroski,Marcela; Bonafé,Elton Gutendorfer; Almeida,Vanessa Vivian de; Souza,Nilson Evelázio de; Visentainer,Jesuí Vergílio. The objective of this study was to quantify alpha-linolenic acid (LNA, 18:3n-3) of dried wheat leaves, harvested at different development stages (20, 40 and 80 days), to determine the antioxidant potential and the total phenolic compounds of leaves harvested at 80 days, as well as to perform mineral analysis (Na, K, Fe, Ca, Mg, P, Zn, Cu and Mn). It was observed a predominance of polyunsaturated fatty acids (PUFA) compared to saturated fatty acids (SFA) in the lipid fraction of leaves. Leaves collected in all periods presented ratios of PUFA/SFA, omega-6 and omega-3 fatty acids (n-6/n-3) considered suitable for food. The highest content of LNA was found in leaves harvested at 60 days, corresponding to 2.146,72 mg 100 g-1 dried matter. The range time... Tipo: Info:eu-repo/semantics/article Palavras-chave: Alpha-linolenic acid; Phenolic compounds; Antioxidant activity. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542011000400012 Domestic processing and storage on the physical-chemical characteristics of acerola juice (Malpighia glabra L.). Ciência e Agrotecnologia Dala-Paula,Bruno Martins; Santos,Taís Pereira dos; Araújo,Laura de Souza; Bastos,Renata Rosane Andrade; Moraes,Juliana de Oliveira; Carbonera,Nádia. ABSTRACT Acerola is a tropical fruit that stands out for its high content of ascorbic acid and phenolic compounds. However, there is currently a lack of information on the effects of the preparation and domestic storage of fruit juices, especially that of acerola. The objective of this work was to evaluate the effect of different liquefying times (10, 30 and 50 s) and cold storage at 4 °C for 0, 24, 48 and 72 h in domestic acerola juice. In relation to such, physicochemical determinations were performed, including pH, total titratable acidity, antioxidant potential, contents of phenolic compounds and total flavonoids in juices produced from the whole fruit, the pulp and acerola seed extracts. Whole fruit juice, liquefied for 10 s, had the highest pH and... Tipo: Info:eu-repo/semantics/article Palavras-chave: Antioxidant potential; Phenolic compounds; Flavonoids. Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100405 Registros recuperados: 98 Primeira ... 1 2 3 4 5 ... Última

Empresa Brasileira de Pesquisa Agropecuária - Embrapa Todos os direitos reservados, conforme Lei n° 9.610 Política de Privacidade Área restrita		Embrapa Parque Estação Biológica - PqEB s/n° Brasília, DF - Brasil - CEP 70770-901 Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco