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Phytochemical screening and antioxidant activity of ethanol extract of Tithonia diversifolia(Hemsl)*** dry flowers

Asian Pacific Journal of Tropical Biomedicine 2014年第9期4卷 740-742页

作者： robson miranda da gama Marcelo Guimares Luiz Carlos de Abreu José Armando-Junior Laboratorio de Pesquisa do Curso de Farmacia Faculdade de Medicina do ABC.Avenida Principe de Gales821Vila Principe de Gales09060-870Santo AndreSPBrasil Departamento de Saude Materno-Infantil Faculdade de Saude Publica.Universidade de Sao PauloBrasil

Objective:To evaluate the antioxidant activity of extracts of dried flowers of Tithonia diversifolia(Hemsl) ***(***) dry flower-a slirubby plant belonging to the Asteraceac family and very common in Brazil,providing data to help prevent premature aging ***:The tests of phytochemical screening included total phenols,tannins,flavonoids,alkaloids and *** active antioxidant was determined by 2,2-diphenyl-1-picrylhydrazyl ***:The phytoehemical screening of *** dry flowers revealed the presence of phenolic compounds(tannins,flavonoids and total phenolsi,while alkaloids and saponins were not *** IC_(50) values showed a strong antioxidant activity of the plant ***:Therefore,this study suggests the possibility of using dry flowers extracts of *** for the prevention of cell aging,as was shown to have significant antioxidant activity.

关键词： Antioxidant activity Phytochemical screening Tithonia diversifolia(Hemsl) A.Gray

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Hair Protective Effect of Argan Oil (Argania spinosa Kernel Oil) and Cupuassu Butter (Theobroma grandiflorum Seed Butter) Post Treatment with Hair Dye

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Journal of Cosmetics, Dermatological Sciences and Applications 2013年第3期3卷 40-44页

作者： Pamella Mello Faria Luciana Neves Camargo Regina Siqueira Haddad Carvalho Luis Antonio Paludetti Maria Valeria Robles Velasco robson miranda da gama Pharmacy School University of Santo AmaroSao PauloSPBrazil School of Pharmaceutical Sciences of University of Sao Paulo Sao PauloBrazil School of Pharmaceutical Sciences of Faculty of Medicine ABC Santo AndreBrazil

Hair coloring is widely used by women and men either to change their natural hair color or to delay the onset of gray hair. Oxidative dyes may damage the hair, since chemical and physical procedures are involved to alter the structure hair and consequently, alterations in its mechanical and of surface properties. One benefit of hair conditioners is to prevent flyaway hair, make the hair “shine”, and protect the hair from further damage. In this research we analyzed the hair protective effect conditioner agents Argania spinosa kernel oil and/or Theobroma grandiflorum seed butter in hair care on Caucasian hair post treatment with hair dye. The hairs were submitted by quantifying protein loss. The samples were classified as: hair untreated (I);hair treated with a commercial oxidative ultra-blond hair dye (II);hair post treatment II and F1: Base hair care formulation (III), hair post treatment II and F2: Base hair care formulation containing 1.0% (w/w) Argania spinosa kernel oil (IV), hair post treatment II and F3: Base hair care formulation containing 1.0% (w/w) Theobroma grandiflorum seed butter (V) and hair post treatment II and F4: Base hair care formulation containing 0.5% (w/w) Argania spinosa kernel oil and 0.5% (w/w) Theobroma grandiflorum seed butter (VI). For the protein loss, the results were: IIA = IIIA > IB = IVB = VB = VIB. Results classified with different letters present statistically significant differents, for α = 5, p ≤ 0.05, n = 6. Based on the results, the incorporation of conditioners agents Argania spinosa kernel oil and/or Theobroma grandiflorum seed butter in base hair care formulation applied in Caucasian hair post treatment with hair dye decreased the damage caused to hair by the coloring process.

关键词： Protein Loss damage Hair Argania spinosa Kernel Theobroma grandiflorum

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Potential for Use of Iron Mining Tailings Calcined in a Flash Furnace as Pozzolanic Material

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Geomaterials 2023年第3期13卷 35-50页

作者： Evandro Moraes da gama Paulo Roberto Gomes Brandão Talita Caroline miranda Tamiris Seerig Scott Ferson Department of Transport Engineering and Geotechnics School of Engineering Federal University of Minas Gerais Belo Horizonte Brazil School of Engineering Federal University of Minas Gerais Belo Horizonte Brazil Vale Belo Horizonte Brazil Institute for Risk and Uncertainty University of Liverpool Liverpool UK

This paper presents a study of the potential use of iron mining tailings as artificial pozzolan (metakaolin) after their submission to thermal treatment via calcination in a flash furnace. The research consists of the characterization of the tailings before and after calcination, chemical, mineralogical, thermogravimetric, and mechanical strength analyses were conducted. The results were compared with those for commonly used pozzolans, metakaolin, and similarities were identified. The study of the morphology of the particles before and after calcination was conducted through analyses of images obtained by scanning electronic microscope. The pozzolanic activity of the fine mining tailings calcined with flash technology was evaluated in uniaxial compression trials, which showed excellent results.

关键词： Mine Tailings Flash Calcination Pozzolanic Activity Compressive Strength

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