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Bruna M. Damm; Izabela de F. Schaffel; Gabriel F. S. dos Santos; Lilia E. S. Azevedo; Rafael de Q. Ferreira; Paulo R. G. de Moura – Journal of Chemical Education, 2023
Antioxidants are molecules that act against free radicals, and this effect can bring many benefits to health and society. Antioxidants can be found in various matrices of nature, such as fruits and plants. Some studies have shown that "Rhizophora mangle," a typical mangrove plant, is rich in antioxidants. People report its use for…
Descriptors: Chemistry, Science Instruction, Scientific Concepts, Plants (Botany)
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Bartoszeck, Amauri Betini; Cosmo, Claudete Rosa; da Silva, Bernadete Rocha; Tunnicliffe, Sue Dale – European Journal of Educational Research, 2015
Children from southern and northern Brazil have a basic knowledge of plants, which they observe during their everyday life. Children ages between 3 to 10 years old (kindergarten & primary school), but the majority of them in the age group of 4-5 (total 145) were asked to draw what they think is a plant (total sample = 332). Afterwards, a equal…
Descriptors: Foreign Countries, Plants (Botany), Young Children, Children
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Teixeira, Zaine; Duran, Nelson; Guterres, Silvia S. – Journal of Chemical Education, 2008
In this experiment, the extract from annatto seeds was encapsulated in poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) particles by the emulsion-solvent evaporation method. The particles were washed and centrifuged to remove excess stabilizer and then freeze-dried. The main compound of annatto seeds, bixin, has antioxidant properties as well…
Descriptors: Research Methodology, Chemistry, Scientific Concepts, Hands on Science