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Registros recuperados: 27
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Alternatives for methane emission mitigation in livestock systems R. Bras. Zootec.
Lascano,Carlos E.; Cárdenas,Edgar.
Human activities are contributing to Global Climate Change through the production of Green House Gases (GHG), which result in increased air, land and ocean temperatures and extreme changes in precipitation in regions of low and high rainfall. The most important GHG's are carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O). It is estimated that 18 % of the annual GHG emissions come from different types of livestock and that 37% of CH4, with higher global warming potential (23) relative to CO2 (1), comes from fermentation processes in ruminants. It is possible that in the future beef and milk exports from producing countries is subject to bans if cattle systems do not comply with measures to reduce GHG. There are several alternatives available and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Climate change; Defaunation; Feed chemical additives; Genetic transformation of bacteria; Greenhouse gases; Immunization; Saponins; Tannins.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001300020
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Bioconversion of apple pomace into a multienzyme bio-feed by two mixed strains of Aspergillus niger in solid state fermentation Electron. J. Biotechnol.
Zhong-Tao,Sun; Lin-Mao,Tian; Cheng,Liu; Jin-Hua,Du.
Apple pomace is a wasted resource produced in large quantities and its deposit has caused serious environmental problems, so it is significance to make the full utilization of the residues. The objectives of this work were to produce multienzyme bio-feed, biodegrade the anti-nutritional factors such as pectin and tannins in apple pomace, and obtain the nutritional enrichment of the fermented substrate. The mixture of apple pomace and cottonseed powder (1:1, w/w), supplemented with 1% (w/w) (NH4)2SO4 and 0.1% (w/w) KH2PO4, was proved to be the optimum medium for the mixed strains of Aspergillus niger M2 and M3 (2:1, w/w). The activities of pectinase, proteinase and cellulase achieved 21168 u/g, 3585 u/g and 1208u/g, and the biodegradation rates of pectin...
Tipo: Journal article Palavras-chave: Apple pomace; Aspergillus niger; Multienzyme bio-feed; Pectin; Solid state fermentation; Tannins.
Ano: 2009 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582009000100002
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Características morfológicas, culinarias y contenido de taninos de semillas de frijol criollo (Phaseolus vulgaris L.) cultivado en comunidades de la región montaña de Guerrero. Colegio de Postgraduados
Dios Espinobarros, Orquidea de.
Un total de 31 variedades de frijol de mata cultivadas en diferentes comunidades de la Región Montaña de Guerrero fueron colectadas con la finalidad de conocer la variabilidad presente en las características morfológicas, culinarias y contenido de taninos en las semillas. Se aplicó un cuestionario a los productores que aportaron sus variedades para obtener información relacionada con los sistemas de siembra utilizados en frijol, modalidad de siembra, destino de la producción y formas de consumo. Los sistemas de cultivos de frijol practicados son en monocultivo e intercalado, la siembra es bajo riego y temporal, la mayoría de los colores de frijol son sembrados en julio. La producción es destinada al autoconsumo y a la venta. El frijol se consume en...
Palavras-chave: Características culinarias; Características morfológicas; Phaseolus vulgaris; Taninos; Variedades nativas; Desarrollo Sostenible de Zonas Indígenas; Maestría Tecnológica; Culinary characteristics; Morphological characteristics; Tannins; Native varieties.
Ano: 2012 URL: http://hdl.handle.net/10521/1825
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Changes in enzymes, phenolic compounds, tannins, and vitamin C in various stages of jambolan (Syzygium cumini Lamark) development Ciênc. Tecnol. Aliment.
Brandão,Taís Silva de Oliveira; Sena,Amanda Reges de; Teshima,Elisa; David,Jorge Maurício; Assis,Sandra Aparecida.
The physiological state of a fruit is closely related to ripening and climatic conditions during the growing period when the fruit undergo changes in color, texture, and flavor. The ripening of the fruit can involve a complex series of biochemical reactions with alteration in enzymes activities, phenols, tannins, and ascorbic acid. The activity of enzymes (carboximethylcellulase, polygalacturonase, and pectinlyase), the total concentration of phenolic compounds, condensed tannins, and vitamin C in five stages of maturation were studied. Significant changes were observed between the maturity stages. The phenolic compounds were higher at green stage (705.01 ± 7.41); tannins were higher at green/purple stage (699.45 ± 0.22). The results showed that the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Syzygium cumini Lam.; Maturity; Total phenolic compounds; Tannins; Vitamin C; Enzymatic activity.
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612011000400004
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Diversity and spatial heterogeneity of mangrove associated sponges of Curaçao and Aruba Naturalis
Hunting, E.R.; Soest, R.W.M. van; Geest, H.G. van der; Vos, A.; Debrot, A.O..
Sponges are major epibionts of mangrove roots in the Caribbean. Mangrove sponge communities in the Caribbean mainly consist of species that are typical to this habitat and community compositions often differ from those found on coral reefs nearby. Heterogeneity in species distributions between locations and within locations between roots is often reported. This study quantifies the diversity and abundance of mangrove associated sponges in the inner bays of Curaçao and Aruba and correlates variability of regional sponge diversity with environmental variables measured along the surveyed sites. Tannin concentrations vary between mangrove roots, and were correlated to sponge cover as a possible cause for habitat heterogeneity on a smaller scale. A total of 22...
Tipo: Article / Letter to the editor Palavras-chave: Epibionts; Heterogeneity; Mangroves; Spatial variations; Sponges; Tannins; 42.72.
Ano: 2008 URL: http://www.repository.naturalis.nl/record/291892
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Efeito de desordens nutricionais na síntese de polifenóis em guandu e leucena utilizadas na alimentação animal. Infoteca-e
LIMA FILHO, O. F. de; ABDALLA, A. L..
Tipo: Folhetos Palavras-chave: Síntese foliar; Desordem nutricional; Deficiency; Composto Fenólico; Nutriente; Silício; Toxidez; Deficiência; Guandu; Tanino; Phenolic compounds; Silicon; Toxicity; Tannins; Nutrition.
Ano: 2020 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1122593
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Efficacy of condensed tannin presents in acacia extract on the control of Trichostrongylus colubriformis in sheep Ciência Rural
Minho,Alessandro Pelegrine; Filippsen,Laerte Francisco; Amarante,Alessandro Francisco Talamine do; Abdalla,Adibe Luiz.
The aim of this study was to evaluate the potential uses of acacia extract (AE) on Trichostrongylus colubriformis control in sheep. The lambs were allocated in three groups of six animals. Two groups were experimentally infected with third-stage larvae of T. colubriformis and one was remained as non-infected control. Thirty days post-infection, the infected animals from treated group were supplemented with AE. During and after the treatment, the values of faecal eggs counts (FEC), number of third-stage larvae recovered per gram of faeces (LPG), number of FEC accumulated per animal during the treatment period, nematode egg viability, and worm burden were determined. Animals from non-infected group did not presented FEC values, during the experimental...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Sheep; Tannins; Nematodes; Egg count.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782010000600019
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Evaluation of the Folin-Ciocalteu Method and Quantification of Total Tannins in Stem Barks and Pods from Libidibia ferrea (Mart. ex Tul) L. P. Queiroz BABT
Galvão,Marcos Aurelio Morais; Arruda,Alice Oliveira de; Bezerra,Isabelle Cristinne Ferraz; Ferreira,Magda Rhayanny Assunção; Soares,Luiz Alberto Lira.
ABSTRACT The stem bark and pods of “jucá” are widely used in Brazilian folk medicine and, despite their therapeutic relevancies, there are insufficient reports about their quality control. Both herbal drugs from the species are rich in tannins, which showed a lot of biological and economic interest. Thus, the purpose of this study was to evaluate the method for quantification of tannins in the stem bark and pods from L. ferrea. The performance of the method was tested against the influence of the most relevant parameters (reaction time; amount of drug; type and amount of precipitationagents; and, concentration of the reagents). The procedure was validated according to the literature. After optimization, the experimental conditions were established as: 30...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Libidibia ferrea; Quality control; Spectrophotometry; Tannins.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100431
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Grape and wine phenolics: Observations and recent findings Ciencia e Investigación Agraria
Kennedy,James A.
What consumers taste in wine is the culmination of management practices from the vineyard to the glass. As researchers, in order to have control over the composition of wine at the time of consumption, it is important to understand how production practices affect wine chemistry. Because phenolic compounds are so important to the overall quality of wine, they are the subject of intense investigation throughout the world. This review is a summary of current knowledge and some recent findings that have taken place in this area.
Tipo: Journal article Palavras-chave: Anthocyanins; Proanthocyanidins; Red wine; Tannins; Vitis vinifera.
Ano: 2008 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202008000200001
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Identification of proanthocyanidins extracted from Pinus radiata D. Don bark Ciencia e Investigación Agraria
Cortés,Soledad; Pulgar,Hugo; Sanhueza,Verónica; Aspé,Estrella; Fernández,Katherina.
The bark of Pinus radiata D. Don is recognized as a rich natural source of proanthocyanidins (PAs). Barks of Pinus radiata D. Don were extracted to produce a raw extract, and then purified to produce 4 fractions, with the aim of correlating its structural characteristics with the extract antioxidant capacity. The structural characterization was performed by acid catalysis in presence of phloroglucinol, foliowed by the detection of the components by High Precision Liquid Chromatography (HPLC). The subunits identified in the bark of Pinus radiata were: epicatechin- (4ß-2) - phloroglucinol (EC-P), catechin- (4á-2) - phloroglucinol (C-F) and (+) -catechin (C). The purified fractions showed different mean degree of polymerization (mDP), average molecular weight...
Tipo: Journal article Palavras-chave: Antioxidant activity; Bark; Pinus radiata; Tannins.
Ano: 2010 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202010000200002
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Nitrogenous compounds, phenolic compounds and morphological aspects of leaves: comparison of deciduous and semideciduous arboreal legumes Scientia Agricola
Lima,Ana Lúcia da Silva; Zanella,Fábio; Schiavinato,Marlene Aparecida; Haddad,Claudia Regina Baptista.
In general, perennial species contain higher concentrations of certain secondary compounds, such as phenolics, lower levels of nitrogenous compounds, and greater specific leaf mass (SLM) than deciduous species. The aim of this study was to verify whether the comparative data reported in the literature regarding deciduous and evergreen species, also applies to four selected species of a semideciduous tropical forest (a remnant of the Atlantic Forest). The four species chosen for this study, each with apparently different leaf life spans, were two semideciduous (Hymenaea courbaril L. var. stilbocarpa (Hayne) Lee et Lang., and Lonchocarpus guilleminianus (Tul.) Malme, and two deciduous (Enterolobium contortisiliquum (Vell.) Morong., and Peltophorum dubium...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Leaf life span; Specific leaf mass; Total nitrogen; Tannins; Atlantic forest.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000100007
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Nutritious tissue in petals of Annonaceae and its function in pollination by scarab beetles Acta Botanica
Gottsberger,Gerhard; Webber,Antonio Carlos.
ABSTRACT The feeding of pollinating dynastid-scarab beetles on nutritious tissue of Annonaceae flowers results in macroscopically visible gnawing marks on petals. In the present paper, we present and discuss examples of such gnawing marks on Annonaceae from the Cerrado and the Amazon Forest in Brazil. The localization of gnawing marks on the petals and the histochemistry of the nutritious tissues are emphasized. In some species, nutritious tissue is apparently distributed among all petals, while in other species it is more or less diffusely localized. There are also cases in which nutritious tissue occurs only on clearly localized regions of the inner petals. Petals of selected Amazon species were stained, and studied by light and scanning electron...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Cerrado and Amazon forest Annonaceae; Electron microscopy; Histochemistry; Lipids; Mucilage cells in petals; Starch; Tannins.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062018000200279
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Otimização e validação de técnica voltamétrica para a detecção e quantificação de compostos fenólicos de interesse agrícola: ácidos fenólicos, flavonoides, taninos e estilbenos. Infoteca-e
MAGARELLI, G.; CAVALCANTE, R. S.; CASTRO, C. S. P. de.
Tipo: Folhetos Palavras-chave: Voltammetry; Method validation; Reducing power; Oxidation potential; Voltametria; Validação de métodos; Poder redutor; Potencial de oxidação; Phenolic acids; Flavonoids; Tannins; Stilbenes.
Ano: 2020 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/1126457
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Phenolic compounds in Merlot wines from two wine regions of Rio Grande do Sul, Brazil Ciênc. Tecnol. Aliment.
Daudt,Carlos Eugenio; Fogaça,Aline de Oliveira.
In Brazil, the grape and wine production takes place mainly in the state of Rio Grande do Sul, and the region "Serra" is known as the traditional wine region. In the last years, new areas have emerged, with emphasis for the Campanha region; the red wines from this region have low acidity, little color intensity, and are wines to drink while young, even when produced from grape varieties such as Merlot and Cabernet Sauvignon. The objective of this study was to evaluate the influence of different maceration types on the phenolic compounds of Merlot wines made with grapes produced in two regions of Rio Grande do Sul, Serra and Campanha, as well as to identify the key differences between the wines produced. The localization of the vineyards seems to have more...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Copigmentation; Anthocyanin; Tannins.
Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612013000200021
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Physicochemical characteristics and sensory acceptance of jambolan nectars ( Syzygium cumini) Ciênc. Tecnol. Aliment.
SOARES,Jackeline Cintra; SOARES JÚNIOR,Manoel Soares; FERREIRA,Karen Carvalho; CALIARI,Márcio.
Abstract The market for ready-to-drink fruit nectars is one of the fastest growing ones, because fruits provide beneficial effects for health maintenance and disease prevention, mainly due to the presence of phenolic compounds and their antioxidant activity. Amongst these, jambolan stands out, but is still little explored. The objective of the present work was to evaluate the influence of different proportions of jambolan pulp, sucrose and water on the physicochemical characteristics and sensory acceptance of jambolan nectars, besides determining the content of some bioactive compounds and the antioxidant capacity of the selected nectar, with a view to adding value to the fruit. Six jambolan nectar formulations were established using a Simplex design. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Color; Total phenolics; Anthocyanin; Tannins; Functional beverage.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612019000500008
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Phytochemical profile and antimicrobial properties of Lotus spp. (Fabaceae) Anais da ABC (AABC)
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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Pithecellobium dulce, Tagetes erecta and Cosmos bipinnatus on reducing enteric methane emission by dairy cows Ciência Rural
Pineda,Gloria Stefanny Hernández; Beltrán,Paulina Elizabeth Pedraza; Benaouda,Mohammed; García,José Manuel Palma; Nova,Francisca Avilés; Molina,Luisa; Ortega,Octavio Alonso Castelán.
ABSTRACT: The aim of the present research was to evaluate the effect of Pithecellobium dulce, Tagetes erecta and Cosmos bipinnatus on methane emission, milk yield and dry matter intake in dairy cattle. A 4×4 Latin square experimental design was employed, using four multiparous Holstein cows of 553±72.4kg body weight, at mid lactation and average milk yield of 17.3±3kg/day. The experiment lasted 92 days, divided into four experimental periods of 23 days each. All cows had free access to maize and alfalfa silage in a 50:50 proportion, 4kg of concentrate/day and ad libitum access to water. Treatments consisted in supplementation of 0.5kg/day of the experimental plants, with one control treatment without supplementation. Each cow received one of each treatment...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Methane; Cattle; Climate change; Mitigation; Tannins.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018001000650
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Produção de madeira, casca e tanino de Acacia mearnsii com sete anos, em solos derivados de micaxistos e arenito no município de Piratini, RS. Infoteca-e
RACHWAL, M. F. G.; DEDECEK, R. A.; CURCIO, G. R.; SIMON, A. A..
Tipo: Folhetos Palavras-chave: Wood production; Espécie exótica; Madeira; Energia; Produção; Acácia negra; Acácia Mearnsii; Tanino; Tannins.
Ano: 2001 URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/304133
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Production of tannase by Aspergillus tamarii in submerged cultures BABT
Costa,Andréa M.; Ribeiro,Wanessa X.; Kato,Elaine; Monteiro,Antonio Roberto G.; Peralta,Rosane Marina.
The production of tannase by Aspergillus tamarii was studied in submerged cultures. The fungus produced an extracellular tannase after two days of growth in mineral medium containing tannic acid, gallic acid and methyl gallate as carbon source. The best result was obtained using gallic acid as inducer (20.6 U/ml). The production of enzyme was strongly repressed by the presence of glucose. Crude enzyme was optimally active at pH 5.0 and 30º C. The enzyme was stable in a large range of pH and up to the temperature of 45º C.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aspergillus tamarii; Enzyme; Fungal biomass; Submerged cultures; Tannase; Tannins.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000200021
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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
Registros recuperados: 27
Primeira ... 12 ... Última
 

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