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au:Pedrosa, Rozangela Curi

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Rejeito de mineração de carvão como adsorvente para remoção da acidez, Fe (III), Al (III) e Mn (II) em drenagem ácida
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Geremias, Reginaldo

; Laus, Rogério

; Fávere, Valfredo Tadeu de

; Pedrosa, Rozangela Curi

Química Nova

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2010, Volume 33 N. 8 Pages 1677 - 1681

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

This study aimed the use of coal mining waste as a new adsorbent for H3O+ and removal of Al (III), Fe (III) and Mn (II) from acid mine drainage. Data from kinetic and equilibrium of the adsorption of H3O+ followed the pseudo second-order and Langmuir isotherm models. The maximum adsorption capacity of H3O+ was 316 mmol kg-1. The adsorbent removed 100% of Al (III), 100% of Fe (III) and 89% of Mn (II), suggesting its use as an alternative for the treatment of acid mine drainage.

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Composição química e atividades biológicas das folhas de Cynara scolymus L. (alcachofra) cultivada no Brasil
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Noldin, Vânia Floriani

; Cechinel Filho, Valdir

; Monache, Franco Delle

; Benassi, Jean Carlo

; Christmann, Irma Luiza

; Pedrosa, Rozangela Curi

; Yunes, Rosendo Augusto

Química Nova

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may 2003, Volume 26 N. 3 Pages 331 - 334

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

The present paper describes the chemical composition and biological activities of artichoke cultivated in Brazil. Our studies demonstrated that glycosyl flavonoids (cynaroside and scolymoside), are the major constituents, along with cynaropicrin, a sesquiterpene lactone, and the triterpene lupeol. Cynarin, which is the main compound described for artichoke, was detected in very low concentration. Hexanic fraction exhibited considerable cytotoxicity and diuretic activities.

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Fármacos e fitoterápicos: a necessidade do desenvolvimento da indústria de fitoterápicos e fitofármacos no Brasil
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Yunes, Rosendo A.

; Pedrosa, Rozangela Curi

; Cechinel Filho, Valdir

Química Nova

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feb 2001, Volume 24 N. 1 Pages 147 - 152

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

We discuss briefly the development and the present status of medicinal chemistry. In this context, we consider the therapeutic possibilities of the phytotherapy. On the basis of this analysis, the development of the phytopharmaceutical industry in Brazil is shown to be of essential importance for both the university and the Country due to the human and technological resources involved.

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