Polyphenolics
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Composition of polyphenols of asparagus spears (Asparagus officinalis) and their antioxidant potential
RESUMO: O objetivo deste estudo foi examinar o impacto da cor da cultivar e da cor dos turiões na composição de polifenóis em aspargos (Asparagus officinalis). Os cinco genótipos (Schwetzinger Meisterschuss, Huchel’s Alpha, Gijnlim, Grolim e Eposs) e três condições de cultivo de aspargos (Asparagus officinalis) foram investigados. Os polifenóis f
Cienc. Rural. Publicado em: 08/04/2019
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2. Chemical and technological evaluation of the Phyllanthus niruri aerial parts as a function of cultivation and harvesting conditions
Tea from Phyllanthus niruri L., Phyllanthaceae, aerial parts is commonly used by Brazilian folk medicine for its benefits on the treatment of genitourinary disorders, for what the polyphenolic compounds are mainly responsible. The yield of such compounds may be influenced by several variables related with the plant growth. The effects of planting periods and
Rev. bras. farmacogn.. Publicado em: 01/02/2013
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3. Bidens sulphurea (Sch. Bip.): efeitos fotodinâmico e antibiótico dos extratos etanólicos de suas flores
Este trabalho teve por objetivo, avaliar alguns efeitos biologicos do extratos bruto (etanolico) das ores de Bidens sulphurea (Asterace), os efeitos avaliados foram: citotoxicidade, efeito antibiotico e fototoxico. Deu-se ênfase aos efeitos fototoxicos, pois o objetivo primario era avaliar se os pigmentos desta planta poderiam ser utilizados como fotosensit
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2011
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4. Evaluation of antidiabetic, antihyperlipidemic and antioxidant effects of Boehmeria nivea (L.) Gaudich., Urticaceae, root extract in streptozotocin-induced diabetic rats
The potential role of 80% methanolic extract of Boehmeria nivea (L.) Gaudich., Urticaceae, root in the treatment of diabetes, along with its antihyperlipidemic and antioxidant effects, was studied in streptozotocin-induced diabetic male Wistar rats. Preliminary screening of the extract revealed the presence of polyphenolics and flavonoids. The animal study w
Revista Brasileira de Farmacognosia. Publicado em: 25/02/2011
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5. Inclusion of polyvinylpyrrolidone in the polymerase chain reaction reverses the inhibitory effects of polyphenolic contamination of RNA.
Polysaccharides, secondary metabolites and poly-phenolics are known to co-isolate with nucleic acids from plant tissues resulting in inhibition of molecular manipulations. RNA isolated from the polyphenolic-rich resurrection plant, Myrothamnus flabellifolius, was demonstrated to inhibit a standard polymerase chain reaction used as an assay despite the inclus
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6. An efficient method for isolation of RNA and DNA from plants containing polyphenolics.
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7. Midiprep method for isolation of DNA from plants with a high content of polyphenolics.
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8. A Strain of Rosa damascena Cultured Cells Resistant to Ultraviolet Light 1
A strain of cultured cells of Rosa damascena Mill. which showed unusual resistance to damage by short wave (254 nanometers) ultraviolet radiation was isolated. The resistant cells were 2.2 to 2.8 times larger and had about twice the amount of DNA and more chromosomes than the parental, sensitive cells. The resistant cells also produced larger quantities of p
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9. A simple and rapid method for isolation of high quality genomic DNA from fruit trees and conifers using PVP.
Because DNA degradation is mediated by secondary plant products such as phenolic terpenoids, the isolation of high quality DNA from plants containing a high content of polyphenolics has been a difficult problem. We demonstrate an easy extraction process by modifying several existing ones. Using this process we have found it possible to isolate DNAs from four
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10. A novel multifunctional O-methyltransferase implicated in a dual methylation pathway associated with lignin biosynthesis in loblolly pine
S-adenosyl-l-methionine (SAM)-dependent O-methyltransferases (OMTs) catalyze the methylation of hydroxycinnamic acid derivatives for the synthesis of methylated plant polyphenolics, including lignin. The distinction in the extent of methylation of lignins in angiosperms and gymnosperms, mediated by substrate-specific OMTs, represents one of the fundamental d
The National Academy of Sciences of the USA.
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11. Effects of Compounds Found in Propolis on Streptococcus mutans Growth and on Glucosyltransferase Activity
Propolis, a resinous bee product, has been shown to inhibit the growth of oral microorganisms and the activity of bacterium-derived glucosyltransferases (GTFs). Several compounds, mainly polyphenolics, have been identified in this natural product. The present study evaluated the effects of distinct chemical groups found in propolis on the activity of GTF enz
American Society for Microbiology.
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12. nip, a Symbiotic Medicago truncatula Mutant That Forms Root Nodules with Aberrant Infection Threads and Plant Defense-Like Response1
To investigate the legume-Rhizobium symbiosis, we isolated and studied a novel symbiotic mutant of the model legume Medicago truncatula, designated nip (numerous infections and polyphenolics). When grown on nitrogen-free media in the presence of the compatible bacterium Sinorhizobium meliloti, the nip mutant showed nitrogen deficiency symptoms. The mutant fa
American Society of Plant Biologists.