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Phenolic content and antibacterial activity of extracts of Hamelia patens obtained by different extraction methods BJM
Paz,Jorge Enrique Wong; Contreras,Carolina Rubio; Munguía,Abigail Reyes; Aguilar,Cristóbal Noé; Inungaray,María Luisa Carrillo.
Abstract Hamelia patens, is a plant traditionally used to treat a variety of conditions among the Huastec people of Mexico. The objective of this study is to characterize the phenolic content and critically examine the antimicrobial activity of leaf extracts H. patens, obtained by maceration, Soxhlet and percolation, using ethanol as 70% solvent. Phenolic compounds are characterized by liquid chromatography, coupled to a High Resolution Mass Spectrometry, and the antimicrobial activity was studied from the inhibitory effect of each extract for Escherichia coli, Staphylococcus aureus, Salmonella typhi and S. paratyphi, and by the Minimum Bactericidal Concentration, the percentage of activity and the Index of Bacterial Susceptibility of each extract. The...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Antibacterial activity; Hamelia patens; Polyphenols; HPLC-MS.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000300656
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Effect of seed maturation stages on physical properties and antioxidant activity in flaxseed ( Linum usitatissimum L.) Ciênc. Tecnol. Aliment.
HERCHI,Wahid; BAHASHWAN,Saleh; TRABELSI,Hajer; SEBEI,Khaled; BOUKHCHINA,Sadok.
Abstract The changes in flaxseed constituents at different stages of maturity are reported. The physical properties and antioxidant activity of flaxseed oil during flaxseed development have been evaluated. Continuous decrease in total polyphenol content during flaxseed development. All the results showed no significant differences between HPLC-MS and TLC for quantitative determination of phospholipids classes. The fatty acid compositions of individual phospholipids were also reported. The antioxidant activity of oilseed was assessed by means of 2, 2-diphenyl-1-picryl-hydrazyl (DPPH) radical scavenging assay. The test demonstrated that the antioxidant activity of the flaxseed oil was found to be harvesting time-dependant.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Physical properties; Antioxidant activity; Total polyphenol content; Flaxseed oil; HPLC-MS; Maturation.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612015000400598
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Anthocyanin characteristics of wines in Vitis germplasms cultivated in southern China Ciênc. Tecnol. Aliment.
CHENG,Guo; ZHOU,Si-Hong; WEN,Ren-De; Xie,Tai-Li; HUANG,Yu; YANG,Ying; GUAN,Jing-Xi; XIE,Lin-Jun; ZHANG,Jin.
Abstract The anthocyanin profiles and CIELAB color values of nine wines in Vitis germplasms from southern China were compared. The results showed that the anthocyanin composition of wines from one hybrid between V. vinifera and V. labrusca (‘Moldova’), two V. labrusca varieties (‘Conquistador’ and ‘Saint-Croix’), one V. quinquangularis variety (‘Yeniang No.2’), one hybrid between V. quinquangularis and V. vinifera (‘NW196’), one V. davidii variety (‘Xiangniang No.1’) and one V. rotundifolia variety (‘Noble’) were dominated by anthocyanidin 3,5-O-diglucosides. All these were quite different from V. vinifera wines (‘Cabernet Sauvignon’ and ‘Marselan’), which were characterized by the monoglucoside and pyranoanthocyanins. 3',4',5'-substituted anthocyanins...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Anthocyanin; Wine; HPLC-MS; V. germplasm; Variety.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000300513
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