Influence of the drying air temperature on the contents and chemical composition of the essencial oil of Melaleuca alternifolia Cheel / Influência da temperatura do ar de secagem no teor e na composição química do óleo essencial de Melaleuca alternifolia Cheel

AUTOR(ES)

Diana Rodrigues Henrique Lemos

DATA DE PUBLICAÇÃO

2008

RESUMO

The Melaleuca alternifolia Cheel (melaleuca), also known as "Tea Tree", is a plant belonging to the family Myrtaceae. Recent studies show the use of essential oils for medical use: anti activities, acaricides, antimicrobial. Because of its medical importance, the study of the chemical and pharmacological features has been widely developed. However, the steps after the harvest, including drying, have not received such attention. This study aims to evaluate the influence of the temperature of air-drying on the content and chemical composition of essential oil Melaleuca alternifolia Cheel. To achieve this goal an experiment was conducted where the plant under study was submitted to drying, using hair-trays, with heated air at 40, 50, 60, 70 and 80 C. The influence of air temperature of drying was evaluated through extractions of essential oil of the plants of melaleuca in Clevenger apparatus and its analyses on the gas chromatograph (GC-MS and GC-FID). It was concluded that: the levels of essential oil extracted from crushed dried plants were not affected by different drying temperatures, however, the drying caused reduction in the essential oil extracted from the fresh Plants crushed; The drying caused significant increase in content of terpinen-4-ol and a-terpineol and significant decreasing in the a-pinene on plants fresh ground. The ground plants can be dried with air temperature of drying up to 80 C, w ithout damage the quality of essential oil.

ASSUNTO(S)

rendimento active principle princípio ativo pre-processamento de produtos agricolas yield plantas medicinais quantificação quantification medicinal plants

Documentos Relacionados

• Análise econômica do cultivo e extração do óleo essencial de Melaleuca alternifolia Cheel
• Efeito da temperatura do ar de secagem sobre o teor e a composição química do óleo essencial de Pectis brevipedunculata
• Influência da temperatura do ar de secagem sobre o teor e a composição química do óleo essencial de Lippia alba (Mill) N. E. Brown
• Óleo de melaleuca (Melaleuca alternifolia Maiden & Betche, Cheel) no controle de cercosporiose em beterraba
• Influência da temperatura do ar de secagem e da utilização do ácido etilenodiaminotetracético na qualidade do óleo e caracterização do fruto de macaúba