Development of a hyphenated procedure of heat-reflux and ultrasound-assisted extraction followed by RP-HPLC separation for the determination of three flavonoids content in Scutellaria barbata D. Don

Antileukemic activity of the chemical constituents from Scutellaria barbata D. Don

“…Previous phytochemical investigations have indicated that S. barbata D. Don contains numerous active components such as flavonoids, including scutellarin, scutellarein, luteolin, apigenin, and baicalin [11,12]; diterpenoids, namely, barbatins A-E, scutebarbatine B, scutehenanines A-D, 6-O-acetylscutehenanine A, 6-O-(2-carbonyl-3-methylbutanoyl) scutehenanine A, scutebatas A-G, and scutelinquanines A-C [13][14][15][16][17]; triterpene acids such as oleanolic acid and ursolic acid [18]; and polysaccharides [10]. However, there were just a few investigations about S. barbata D. Don according to bioactivity-directed fractionation and isolation [19,20].…”

Estudo Da Extração E Quantificação De Fenólicos Presentes No Resíduo De Acerola

“…Com isso, o método da extração assistida por ultrassom vem sendo incorporada a fim de melhorar os métodos de extração com solventes. O método utilizando-se o ultrassom Vem sendo utilizada para análise de fenólicos em ervas medicinais (Wei et al, 2013), frutas (Goula et al, 2016), plantas (Xu et al, 2017;Baghdikian et al, 2016) e resíduos agroindustriais (Melo, 2010).…”

“…Com isso, o método da extração assistida por ultrassom vem sendo incorporada a fim de melhorar os métodos de extração com solventes. O método utilizando-se o ultrassom Vem sendo utilizada para análise de fenólicos em ervas medicinais (Wei et al, 2013), frutas (Goula et al, 2016), plantas (Xu et al, 2017; Baghdikian et al, 2016) e resíduos agroindustriais (Melo, 2010).Durante o processo de extração, vários fatores podem influenciar no resultado, tais como temperatura, a concentração do solvente extrator, o tempo de extração e a razão solvente/amostra. Considerando isso, este trabalho objetivou encontrar a condição desejável para obtenção de resultados melhores das variáveis influenciadoras frente aos compostos bioativos presentes na acerola, tais como os fenólicos totais, flavonoides totais e a atividade…”

Kinetic and characterization studies for three bioactive compounds extracted from Rabdosia rubescens using ultrasound

“…At present, UAE is an attractive alternative to conventional solid-liquid extractions in various areas, including the food, nutraceutical, pharmacy, biotechnology and cosmetic industries as well as environmental engineering. This method is a valuable alternative because it can significantly improve the extraction efficiency, reduce the solvent requirements, shorten the extraction time and extract thermally labile compounds under mild conditions (Wei et al, 2013;Yang et al, 2013d).…”

“…Ultrasound-assisted extraction can be coupled to other extraction techniques, such as heat-reflux extraction (HRE) (Wei et al, 2013;Yang et al, 2013d), supercritical carbon dioxide extraction (Yang et al, 2013e; and microwave-assisted extraction (Bagherian et al, 2011;Cheng et al, 2011;Leonelli and Mason, 2010). Combined or hyphenated extraction processes may significantly improve the extraction process, shorten the extraction time, lower the solvent requirement and increase the extraction yield relative to the individual operations (Da Porto and Decorti, 2009).…”