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Abstract
The evaluation and composition of the leaves extracts profile of Parapiptadenia rigida and Piptadenia gonoacantha using supercritical CO2 in different conditions of temperature (40, 60, 80oC) and pressure (100, 150, 200 bar) were studied. Experiments were performed in a unit mainly containing a stainless steel extractor and a micrometer valve for sampling. The better pressure for the extraction was 200 bar. The best temperature for extraction was 60oC for Parapiptadenia rigida (0.73%), and 80oC for Piptadenia gonoacantha (1.13%). Benzene sulfonamide was presented in all extracts and makes an interesting characteristic of the extracts due to the antifungal activity against plant pathogens.
Highlights
The Piptadenia genus belongs to Mimosoideae (Leguminosae) family and contains about 133 tropical species commonly found in Brazil and South America
The leaves samples of Parapiptadenia rigida and Piptadenia gonoacantha were collected in the Forest Institute (FI) of the Federal Rural University of Rio de Janeiro by Professor Acácio Geraldo de Carvalho and Professor José Aguiar Sobrinho
The best extraction conditions were obtained at 60 °C and under pressure of 200 bar with the yield of 0.73%, for P. rigida leaves
Summary
The Piptadenia genus belongs to Mimosoideae (Leguminosae) family and contains about 133 tropical species commonly found in Brazil and South America. The Piptadenia species are known, in Brazil, as “angico” and in Argentina and Paraguay, as “cebil” The plants of this genus have been used in the tannery industry due to its bark that is rich in tannins. They helped the forests recovery because they can growth in poor and degraded soil (CORREA, 1984; LORENZI, 2002). The Parapiptadenia rigida (Benth) Brenan, and the former synonym Piptadenia rigida, species is a tree that reaches between 20 and 30 m in height It is popularly known as angico red and is often found in the Atlantic Forest. The plant has ornamental features that recommend it for the landscaping in general (LORENZI, 2002)
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