O Coumaric Acid
Mostrando 13-24 de 34 artigos, teses e dissertações.
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13. Stimulation of Acidic Reduction of Nitrite to Nitric Oxide by Soybean Phenolics: Possible Relevance to Gastrointestinal Host Defense
This study aimed to evaluate the potential of soybean-promoted acidic nitrite reduction and to correlate this activity with the content of phenolics and with the bactericidal activity againstEscherichia coliO157:H7. Extracts of embrionary axes and cotyledons enriched in phenolics increased •NO formation at acidic pH at values that were 7.1 and 4.5 times hi
Publicado em: 15/06/2013
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14. Antioxidant activities of isolated compounds from stems of Mimosa invisa Mart. ex Colla
This work describes the phytochemical study of stems of Mimosa invisa (Mimosaceae) and the evaluation of the antioxidant potential of isolated compounds. Cromatografic techniques were employed to isolate salicifoliol, pinoresinol, quercetin, quercetin-3-O-rhamnopyranosyl, quercetin-3-O-arabinofuranosyl lupeol, β-amyrin, sitosterol, p-hydroxy coumaric acid,
Química Nova. Publicado em: 2012
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15. Jasmonic acid elicits oxidative defense and detoxification systems in Cucumis melo L. cells
This study investigated whether a jasmonic acid (JA) elicitation strategy developed in a conventional cell suspension culture could evoke melon resistance mechanisms, including secondary metabolite production. Twenty one day cultured melon cell suspensions grown in MS1 medium were supplemented with JA at the concentrations of 0.5, 5.0 and 10 µmol. Melon cul
Brazilian Journal of Plant Physiology. Publicado em: 2011
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16. Chemical characterization and quantification of phenolic compounds in forage grasses / CaracterizaÃÃo quÃmica e quantificaÃÃo de compostos fenÃlicos em forrageiras
The chemical characterization and determination of the phenolic compounds present in forage is of great importance as it allows for a better use of these plants in animal nutrition. This study characterized the chemical and bromatological composition of the forages Stylosanthes guianensi; MineirÃo and Campo Grande cultivars, and Arachis pintoi; Amendoim Bel
Publicado em: 2009
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17. Sistemas modelos de formação de lignina utilizando recursos sintéticos e celulares de Eucalyptus grandis (Hill ex Maiden). / Systems models of lignin formation using synthetic and cellular resources of Eucalyptus grandis (Hill ex Maiden).
The main objective of this research was to work out models for the study of the lignification. Eucalyptus grandis seedlings were produced in vitro, and the stem segments explants were used to obtain friable callus. For such, the auxins tested were TDZ, 2,4-D, NAA and IAA. The treatments with 50,0 μM 2,4-D; 3,0 μM TDZ and in the absence of growth re
Publicado em: 2009
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18. Aspectos quÃmicos do estudo interdisciplinar (quÃmica-agronomia-farmacologia) de Amburana cearensis A.C. Smith / Chemical aspects of the investigations to interdisciplinar (chemistry-agronomy-pharmacology)de Amburana cearensis A. C. Smith
Amburana cearensis A.C. Smith is a typical tree of the northeastern Brazil flora designated âcaatingaâ. It is popularly known either as âimburana-de-cheiroâ or âcumaruâ and characterized by its red-gray bark of peculiar and pleasant smell due to coumarin. Despite A. cearensis relevant economical (particularly for carpentry and perfumery) and medicinal
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 10/08/2007
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19. Chemical constituents from Bakeridesia pickelii Monteiro (Malvaceae) and the relaxant activity of kaempferol-3-O-beta-D-(6"-E-p -coumaroyl) glucopyranoside on guinea-pig ileum
The phytochemical investigation of Bakeridesia pickelii Monteiro led to the isolation of seven compounds: beta-sitosterol, a mixture of sitosteryl-3-O-beta-D-glucopyranoside and stigmasteryl-3-O-beta-D-glucopyranoside, vanillic acid, p-coumaric acid, quercetin 3-O-beta-D-glucopyranoside (isoquercitrin) and kaempferol-3-O-beta-D-(6"-E-p -coumaroyl) glucopyran
Química Nova. Publicado em: 2007-08
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20. Chromatographical profiles of fluid extracts and tinctures obtained from Mikania glomerata Sprengel sterilized by gamma ray irradiation
Aerial parts of Mikania glomerata Sprengel, were irradiated with gamma rays in an apparatus with a Cesius-137 source in two different doses: 3.5 and 5.0 KGy. Double-blind HPLC studies on fluid extracts and tinctures prepared from the irradiated drug material were utilized to verify possible chemical changes. Extracts from the same plant (untreated) were used
Revista Brasileira de Farmacognosia. Publicado em: 2005-09
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21. CARACTERIZAÇÃO CROMATOGRÁFICA DE EXTRATOS MEDICINAIS DE GUACO: Mikania laevigata SCHULTZ BIP. EX BAKER E M. glomerata SPRENGEL E AÇÃO DE M. laevigata NA INFLAMAÇÃO ALÉRGICA PULMONAR / LC CARACTERIZATION OF GUACO MEDICINAL EXTRACTS: Mikania laevigata SCHULTZ BIP. EX BAKER AND M. glomerata SPRENGEL, AND EFFECTS ON PULMONARY ALLERGIC INFLAMMATION
Mikania laevigata Schultz Bip e Mikania glomerata Sprengel são popularmente conhecidas como guaco e utilizadas para o tratamento de doenças respiratórias. Com o objetivo de contribuir para o controle de qualidade de extratos medicinais de guaco, neste trabalho, foi desenvolvida e validada uma metodologia para quantificar simultaneamente três marcadores q
Publicado em: 2005
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22. Properties of a Maize Glutathione S-Transferase That Conjugates Coumaric Acid and Other Phenylpropanoids.
A glutathione S-transferase (GST) enzyme from corn (Zea mays L. Pioneer hybrid 3906) that is active with p-coumaric acid and other unsaturated phenylpropanoids was purified approximately 97-fold and characterized. The native enzyme appeared to be a monomer with a molecular mass of approximately 30 kD and an apparent isoelectric point at pH 5.2. The enzyme ha
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23. Intracellular Localization of Two Enzymes Involved in Coumarin Biosynthesis in Melilotus alba1
The localization of phenylalanine ammonia-lyase [EC 4.3.1.5] within sweet clover (Melilotus alba) leaves was investigated. Apical buds and axillary leaves contained 15 to 30 times more enzyme activity than did mature leaves. Mesophyll protoplasts were prepared by digesting young leaves with Cellulysin and Macerase and were gently ruptured yielding intact chl
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24. Pathway of Salicylic Acid Biosynthesis in Healthy and Virus-Inoculated Tobacco.
Salicylic acid (SA) is a likely endogenous regulator of localized and systemic disease resistance in plants. During the hypersensitive response of Nicotiana tabacum L. cv Xanthi-nc to tobacco mosaic virus (TMV), SA levels rise dramatically. We studied SA biosynthesis in healthy and TMV-inoculated tobacco by monitoring the levels of SA and its likely precurso