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Determination of acetonitrile and cyanide in rat blood: Application to an experimental study
(2005-03-01)
Methods were developed for the analysis of acetonitrile and its metabolite cyanide in the blood of rats exposed to acetonitrile. Acetonitrile was analyzed by the headspace technique coupled to gas chromatography with ...
Incidence of patulin in fruits and fruit juices marketed in Campinas, Brazil
(1999-02-06)
One hundred and eleven samples of processed fruit juices (apple, grape, pineapple, papaya, guava, banana and mango) and 38 samples of sound fruits (apple, papaya, mango, pear and peach) produced and marketed in Brazil, ...
Quick preparative separation of natural naphthopyranones with antioxidant activity by high-speed counter-current chromatography
(2002-11-01)
The natural naphthopyranones paepalantine (1), paepalantine-9O-β-D-glucopyranoside (2) and paepalantine-9-O-β-D-allopyranosyl-(1→6)-O-β-D-glucopyranoside (3) were separated in a preparative scale from the ethanolic extract ...
Biocompatible microemulsion modifies the pharmacokinetic profile and cardiotoxicity of doxorubicin
(2013-01-01)
Doxorubicin (DOX) is an anthracycline antibiotic with a broad antitumor spectrum. However, the clinical use of DOX is limited because of its cardiotoxicity, a dose-dependent effect. Colloidal drug delivery systems, such ...
Determination of the geometrical diarylpropenamine isomers in feces by high-performance liquid chromatography
(1999-05-14)
Diarylpropenamine derivatives are a class of compounds which have been evaluated as potential drug candidates. Here a specific and reproducible HPLC method for the determination of cis- and trans-isomers of the unsubstituted ...
HPLC determination of flumethrin, deltamethrin, cypermethrin, and cyhalothrin residues in the milk and blood of lactating dairy cows
(1997-09-01)
A procedure to determine residue concentrations of synthetic pyrethroid insecticides (flumethrin, deltamethrin, cypermethrin and cyhalothrin) in the milk and blood of lactating dairy cows was developed. Extraction was ...
Identification of ellagic acid derivatives in methanolic extracts from Qualea species
(2008-12-01)
The methanolic extract from the barks of the medicinal plant Qualea parviflora (Vochysiaceae) was fractionated by column chromatography over silica gel followed by gel permeation over Sephadex LH-20 to give 3,3′-di-O- ...
Application of HPLC-NMR coupling using C30 phase in the separation and identification of flavonoids of taxonomic relevance
(2000-12-01)
The on-line separation and identification of two important taxonomic markers for plant species of the Paepalanthus genus, the flavonoids 6-methoxykaempferol-3-O-β-D-glucopyranoside and 6-methoxykaempferol-3-O-β-D-6″(p-co ...