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Some podand sulfonamides were designed to Cu2+ ion recognition. Some green chemistry metrics were evaluated in order to know the environmental impact of the reactions. Cu2+ complexes studio with the ligands were done, given adequate complexation constants for Cu2+ recognition by ligands LA2 y LA6. All complexes precipitated instantaneously when directly react with copper ions resulting in blue complexes. For LA2 a color change to olive green in 8 minutes was observed maybe due to a molecular reorganization. LA2 can be used as a part of an ion recognition kit that detect concentration in the order of 10-3 mol·dm-3. [ABSTRACT FROM AUTHOR]

Aim: To evaluate the antioxidant and anti-inflammatory activity in hydroalcoholic extracts of the aerial parts of Kalanchoe daigremontiana Raym. -Hamet & H. Perrier. Materials and methods: Extracts were obtained using ethanol (EtOH) and methanol (MeOH) as solvents at different concentrations. Total phenols and flavonoids were quantified using the Folin-Ciocalteu method and the aluminum complexation reaction, respectively. Methodology: The antioxidant activity of the extracts was determined using the DPPH• (2,2-diphenyl-1-picrylhydracil) free radical discoloration technique, while lipoxygenase (LOX) inhibition assays were used to measure the anti-inflammatory activity. Results: The 70% ethanolic extract showed a greater antioxidant capacity against DPPH• and a greater inhibition of the lipoxygenase enzyme, which should be related to the overall phenols and flavonoids content, suggesting that K. daigremontiana exhibits antioxidant and anti-inflammatory properties. [ABSTRACT FROM AUTHOR]

The aim of this study was to evaluate the antioxidant activity in hydroalcoholic extracts of the aerial parts of Portulaca oleracea L. Extracts were obtained using methanol and ethanol as solvents. Total phenols and flavonoids were quantified using the Folin-Ciocalteu method and the aluminum complexation reaction. The antioxidant activity of the extracts was screened using the DPPH• (2,2-diphenyl-1-picrylhydracil) radical scavenging method and the ABTS•+ (2,2'-azino-bis(3-ethylbenzothiazolin)- 6-sulfonic acid) assay. The methanolic extract showed a greater antioxidant capacity against DPPH• and ABTS•+, as well as a higher content of total phenols and flavonoid, in comparison to the ethanolic extract. These results suggest that the aerial parts of P. oleracea exhibit antioxidant activity. [ABSTRACT FROM AUTHOR]