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Poly(glutamic acid) nanofibre modified glassy carbon electrode: Characterizatio...
Santos, Daniela Pereira; Zanoni, Maria Valnice Boldrin; Bergamini, Márcio Fernando; Chiorcea-Paquim, Ana-Maria; Diculescu, Victor ConstantinGlassy carbon electrodes (GCE) were modified with poly(glutamic acid) acid films prepared using three different procedures: glutamic acid monomer electropolymerization (MONO), evaporation of poly(glutamic acid) (PAG) and evaporation of a mixture of poly(glutamic acid)/glutaraldehyde (PAG/GLU). All three films showed good adherence to the electrode surface. The performance of the modified GCE was investigated by...
Constituintes químicos de Galianthe brasiliensis (RUBIACEAE)
Moura,Vagner Marques de; Santos,Daniela Pereira dos; Santin,Silvana Maria de Oliveira; Carvalho,João Ernesto de; Foglio,Mary AnnThis paper describes the chemical constituents isolated from aerial parts of the plant Galianthe brasiliensis. From a methanol extract, the iridoid glycosides asperuloside, deacetylasperuloside, mixture of Z- and E-6-O-p-coumaroylscandoside methyl ester, the triterpene ursolic acid and the steroids stigmasterol, campesterol, beta-sitosterol and 3-O-beta-glycopiranosyl sitosterol were isolated. The structures of...
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