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	Provedor de dados BJPS (2) Autor Bottoli,Carla Beatriz Grespan (2) Aguiar,Valeska Soares (1) Aquino,Walkyria Moraes de (1) Gutiérrez-Ponce,María de Jesús Santa (1) Salvador,Marcos José (1) Silva,Gisláine Correa da (1) Mais... Palavra-chave Antioxidant (1) Capillary eletrochromatography/quantitative analysis (1) Emulsion (1) HPLC-DAD (1) Isovitexin (1) Parabenos/determination (1) Passiflora coccinea (1) SPF (1) Sweeteners/quantitative analysis (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2020 (1) 2011 (1) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Determination of parabens in sweeteners by capillary electrochromatography BJPS Bottoli,Carla Beatriz Grespan; Gutiérrez-Ponce,María de Jesús Santa; Aguiar,Valeska Soares; Aquino,Walkyria Moraes de. Parabens, common food preservatives, were analysed by capillary electrochromatography, using a commercial C18 silica (3 µm, 40 cm × 100 µm i. d.) capillary column as separation phase. In order to optimise the separation of these preservatives, the effects of mobile phase composition on the separation were evaluated, as well as the applied voltage and injection conditions. The retention behavior of these analytes was strongly influenced by the level of acetonitrile in the mobile phase. An optimal separation of the parabens was obtained within 18.5 minutes with a pH 8.0 mobile phase composed of 50:50 v/v tris(hydroxymethyl)aminomethane buffer and acetonitrile. The method was successfully applied to the quantitative analysis of paraben preservatives in... Tipo: Info:eu-repo/semantics/article Palavras-chave: Capillary eletrochromatography/quantitative analysis; Parabenos/determination; Sweeteners/quantitative analysis. Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502011000400015 Towards the cosmetic application of Passiflora coccinea (Aubl.): antioxidant activity and photo protective capacity of the methanolic and glycolic leaf extracts BJPS Silva,Gisláine Correa da; Salvador,Marcos José; Bottoli,Carla Beatriz Grespan. The present study aimed at the evaluation of Passiflora coccinea (Aubl.) antioxidant and photo protective in vitro activities, looking forward to their application as antiaging or sunscreen agents in cosmetic formulations. Methanolic and glycolic leaf extracts were prepared by three methods: ultrasound assisted extraction (UAE, 30 min.), maceration at room temperature (72 h) and maceration at 30 ºC (72 h). The antioxidant activities of the extracts were measured by DPPH and ORAC-FL assays and they were incorporated into a cosmetic emulsion to have their sun protection factor (SPF) measured spectrophotometricaly. The antioxidant activity of the emulsions were measured by DPPH and ORAC as well. C-glycosyl-flavones were identified in the extracts by... Tipo: Info:eu-repo/semantics/article Palavras-chave: Passiflora coccinea; Emulsion; Antioxidant; SPF; Isovitexin; HPLC-DAD. Ano: 2020 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100511 Registros recuperados: 2 Primeira ... 1 ... Última

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