Extraction of Campomanesia xanthocarpa fruit using supercritical Co2 and bioactivity assessments

This study reports extraction of Campomanesia xanthocarpa fruit using supercritical CO2 and its chemical composition and biological activity analysis. The experiments were carried out at 15.0, 20.0 and 25.0 MPa and 313.15, 333.15 and 353.15 K. The maximum yield observed was 3.90 wt% at 313.15 K and 25 MPa. The pressure had a significant and positive effect on extraction yields, whereas the temperature effect was significant and negative. Gas chromatography analysis showed that the main compounds identified were alpha-eudesmol, beta-eudesmol, gamma-eudesmol, caryophyllene (E), alpha-sabinene, beta- sabinene, germacrene B, delta-cadinene, humulene and selina-3,7(11)-diene. The highest values of antioxidant activity were found for the extracts obtained at (313.15 K and 25 MPa) and at (353.15K and 15.0 MPa), determined by the DPPH method and the phosphomolybdenum reduction method, respectively. The extract obtained at 353.15K and 25 MPa presented the highest phenolic content (39.12 mg GAE/g of extract). The extract obtained at 313.15 K and 15 MPa presented the maximum antibacterial activity against Staphylococcus aureus. The Gram-negative bacteria tested (Escherichia coli, Pseudomonas aeruginosa and Salmonella typhimuruim) and Listeria monocytogenes were completely resistant toward the C. xanthocarpa fruit extracts987985CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES485689/2012-0; 303573/2012-0sem informaçãoFundacao Araucari

Kinetics, composition and biological activity of Eupatorium intermedium flower extracts obtained from scCO(2) and compressed propane

The extraction of Eupatorium intermedium flowers was evaluated using supercritical CO2 (scCO(2)) and compressed propane. Experiments were carried out under the following conditions using scCO(2) as the solvent: 15.0, 20.0 and 25.0 MPa and at 303.15, 328.15 and 353.15 K, and the maximum extraction yield was 5.85 wt%. With propane as the solvent the conditions applied were 3.0, 6.5 and 10.0 MPa and 293.15, 313.15 and 333.15 K, and the maximum extraction yield was 9.34 wt%. When scCO(2) was used the pressure had a positive effect on the extraction yield while with the use of propane both variables (pressure and temperature) had a positive effect. Gas chromatographic analysis showed that the major compounds were spathulenol, caryophyllene oxide, caryophyllene (E), germacrene D, bicyclogermacrene and carotol, for the two solvents. The highest values for antioxidant activity were found for the extracts obtained using scCO(2) at 303.15 K and 15 MPa and propane at 333.15 K and 3.0 MPa, determined by the DPPH method and the phosphomolybdenum reduction method. The extract obtained using propane at 293.15 K and 3.0 MPa presented the highest phenolic content. The highest antibacterial activity was observed for the extracts obtained with scCO(2) against Staphylococcus aureus and Listeria monogtogenes97145153CONSELHO NACIONAL DE DESENVOLVIMENTO CIENTÍFICO E TECNOLÓGICO - CNPQCOORDENAÇÃO DE APERFEIÇOAMENTO DE PESSOAL DE NÍVEL SUPERIOR - CAPES477034/2013-6; 303573/2012-0sem informaçãoFundacao Araucari

O corpo na escola: mapeamentos necessários

Este estudo propõe um mapeamento do corpo na escola, na tentativa de possibilitar aos educadores iniciantes uma construção do olhar para o aluno com seu corpo, bem como estimular o educador a se situar com seu corpo nesse contexto. Partindo da análise de dois eixos interdependentes: (1) a concepção de sujeito-corpo e (2) espaços e tempos do corpo na escola, busca-se contribuir para a discussão educacional, expondo como o currículo, a didática e a avaliação, entre outros elementos, podem sinalizar as considerações dadas ao corpo. O estudo conclui mostrando o parodoxo representado pelos mesmos elementos, quando problematizados por meio das relações de poder