Bibliometric reviews, carried out from access to databases of scientific articles associated with software for data processing, can be helpful for qualitative and quantitative assessments of existing publications on a given topic. Several petroleum hydrocarbons are carcinogenic and immunotoxic agents, causing adverse effects on the biota, and the study of metabolites generated in bioremediation processes has been the object of current research. Therefore, in this work, the use of bibliometric analysis as a tool for surveying studies on the applied metabolomics bioremediation of areas impacted by hydrocarbons is presented. A bibliometric review was carried out in the Scopus Preview and Web of Science databases with data analysis using RStudio software with the bibliometrix package. The survey gathered the studies and prominent publications of the last seven years, making it possible to present gaps and opportunities in the area. reviews processing topic agents biota research Therefore work presented package years area

ABSTRACT At the Brazilian Amazon forest, studies were carried out to estimate the community of arbuscular mycorrhizal fungi (AMF), from this it was used a bioassay of dilutions of samples collected from preserved and regenerated areas after bauxite extraction. To regenerate areas, tree species were introduced and samples were taken after 2, 6, 12, and 16 years, the spores obtained were compared to those obtained by direct extraction and the number of species recovered from the bioassay was significantly higher. Therefore, the species founded after different periods regeneration was similar to the ones from the native forest. Since the early years of revegetation, the number of rare species was high with strong dominance of G. macrocarpum. Among older communities this high dominance decreased while at the same time, there was an increase in the number of individuals from other AMF species, concluding that the number of species did not change with the age of the revegetation.

RESUMO A Portulaca oleracea L. (Portulacaceae) é uma espécie cosmopolita com uma vasta gama de atividades biológicas, incluindo as ações antioxidante e neuroprotetora. No presente trabalho foram investigados os efeitos do tratamento com extratos de P. oleracea em modelo animal (aplicação de 6-hidroxidopamina) para estudo da doença de Parkinson, uma desordem debilitante para a qual não há tratamentos efetivos. Os perfis químicos do extrato aquoso e etanólico obtidos a partir de todas as partes da planta foram analisados por cromatografia em camada delgada e a atividade antioxidante foi avaliada pelo método de 2,2-difenil-1-picrilhidrazil (DPPH). Ratos Wistar machos receberam aplicação intraestrial de 6-hidroxidopamina e foram tratados com veículo ou com os extratos (por via oral, 200 e 400 mg/kg) diariamente durante duas semanas. O teste comportamental de campo aberto foi realizado nos dias 1 e 15. A análise imunohistoquímica foi realizada 4 semanas depois da cirurgia a fim de quantificar as células positivamente marcadas para a enzima tirosina-hidroxilase na substância negra compacta. Os extratos apresentaram atividade antioxidante em concentrações superiores a 300 µg/kg. A análise cromatográfica revelou a presença de levodopa, alcalóides, flavonóides, saponinas, taninos, terpenóides e polissacáridos. Ambos os extratos promoveram recuperação da função motora 15 dias após a lesão e protegeram contra a perda de neurônios positivos para a tirosina-hidroxilase depois de 4 semanas, mas estes efeitos foram mais evidentes para o extrato aquoso. Considerando a presença no precursor dopaminérgico e de compostos com ação antioxidante e neuroprotetora nos extratos, a P. oleracea pode representar uma potencial alternativa para o tratamento da doença de Parkinson.

ABSTRACT The Portulaca oleracea L. (Portulacaceae) is a cosmopolitan species with a wide range of biological activities, including antioxidant and neuroprotective actions. We investigated the effects of P. oleracea extracts in a 6-hydroxydopamine rat model of Parkinson's disease, a debilitating disorder without effective treatments. Chemical profiles of aqueous and ethanolic extracts of whole plant were analyzed by thin layer chromatography and the antioxidant activity was assessed by 2,2-diphenyl-1-picrilhidrazila method. Male Wistar rats received intrastriatal 6-hydroxydopamine and were treated with vehicle or extracts (oral, 200 and 400 mg/kg) daily for two weeks. The behavioral open field test was conducted at days 1 and 15. Immunohistochemical analysis was performed 4 weeks after surgery to quantify tyrosine-hydroxylase cell counts in the substantia nigra pars compacta. Extracts presented antioxidant activity in concentrations above 300 µg/kg. The chromatographic analysis revealed the presence of Levodopa, alkaloids, flavonoids, saponins, tannins, terpenoids and polysaccharides. Both extracts improved motor recovery 15 days after lesion and protected from tyrosine-hydroxylase cell loss after 4 weeks, but these effects were more evident for the aqueous extract. Because the dopamine precursor is present, in addition to antioxidant compounds and neuroprotective effects, P. oleracea can be considered as potential strategy for treating Parkinson's disease.

The objective of this study was to identify the pharmacological effects of bee venom and its major component, melittin, on the nervous system of mice. For the pharmacological analysis, mice were treated once with saline, 0.1 or 1.2 mg/kg of bee venom and 0.1 mg/kg of melittin, subcutaneously, 30 min before being submitted to behavioral tests: locomotor activity and grooming (open-field), catalepsy, anxiety (elevated plus-maze), depression (forced swimming test) and apomorphine-induced stereotypy. Haloperidol, imipramine and diazepam were administered alone (positive control) or as a pre-treatment (haloperidol).The bee venom reduced motor activity and promoted cataleptic effect, in a similar manner to haloperidol.These effects were decreased by the pretreatment with haloperidol. Both melittin and bee venom decreased the apomorphine-induced stereotypies. The data indicated the antipsychotic activity of bee venom and melittin in a murine model.

A sensitive spectrophotometric method was developed for sulphate determination in automotive ethanol fuel. The method based on the reaction of the analyte with barium-dibromosulphonazo(III) complex lead to a decrease in the magnitude of the absorbance signals monitored at 649 nm. No sample pretreatment is required and the proposed method allows sulphate determination in the 0.45 - 6.50 mg L-1 range with R.S.D. < 2% and limit of detection of 0.14 mg L-1. The method has been successfully applied for sulphate determination in automotive ethanol fuel and the results agreed with the reference chromatographic method.