Maria Luiza Feitosa Menezes

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For assessing the impact of chlorinated compounds, such as organochlorine pesticides, polychlorinated biphenyls, chlorotriazines (atrazine, simazine), and chlorinated phenylureas (diuron), on the Ponta Grossa lake South of Brazil, ten freshwater trahira fish (Hoplias malabaricus) were collected in October 2005. The contamination status was evaluated by the(More)
Piperine, an alkaloid present in the Piper genus, was shown to have an anticonvulsant activity, evaluated by the pilocarpine-induced model, in mice. Pilocarpine (350mg/kg, i.p.) was administered 30min after piperine (2.5, 5, 10 and 20mg/kg, i.p.) which significantly increased latencies to 1st convulsion and to death, and percentage of survivals. These(More)
Catecholamines act as neurotransmitters and hormones. Studies conducted to understand the synthesis and metabolism of these monoamines during stress have been the main concern of many authors. This work proposes to investigate the time course of changes in epinephrine and norepinephrine concentration in adrenal gland obtained from rats submitted to acute(More)
A new IS-anionic stationary phase was synthesized to make on-line extraction of the ochratoxin A and B from samples of beer for HPLC. The pro-pyltriethylammonium chloride stationary phase was characterized affecting it's elementary determination and RI specter, respectively. Evaluation of the IS-anionic column for the extraction and quantification of OTA(More)
In the present research, assays were improved for the determination of catecholamines in adrenal gland. High-performance liquid chromatography with electrochemical detection was employed for quantitative analysis. The method involved direct injection of acid extract on to a serum albumin dimethylocadecyl-silane (HSA-C18) and the utilization of phosphate(More)
The importance of anti-reticulin antibodies (ARA)--R1 pattern--has been evaluated as a diagnostic and monitoring test for childhood coeliac disease. A prospective study was performed in 140 patients: 68 children with coeliac disease, 32 with miscellaneous diarrhoea, and 40 controls. An indirect immunofluorescent test was used for ARA screening. The indirect(More)
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